The defrosting device for a refrigerator and method of operating such a device

 

(57) Abstract:

The invention relates to a defrosting device for controlling the operation of the defrosting of the evaporators associated with the freezing and refrigerating chambers of the refrigerator, and method of operating such a device. The technical result of the invention is to improve the reliability of the elements of the device and securing the quality of stored products. The defrosting device for a refrigerator and a control method that the defrosting device in which the cooling chamber is cooled regardless of the internal temperature of the freezing chamber, when the internal temperature of the refrigerating chamber exceeds the set temperature, so that the cooling chamber is maintained at a temperature below a predetermined temperature. Defrosting is carried out in accordance with the times of the compressor and fan of the refrigerating chamber, when the internal temperature of the refrigerating chamber exceeds the set temperature, even if the compressor and fan cooling chambers operate continuously. Therefore, it is possible to improve the cooling efficiency. In the case of fast cooling time, when it starts thawing you can see what na temperature of the refrigerating chamber. In the case of defrost time when operation begins defrosting freezers, accurately determined by calculating the gradient of the temperature drop on the basis of the internal temperature of the freezing chamber. In any case, accordingly, the defrosting operation can be performed efficiently. 6 S. p. and 12 C.p. f-crystals, 15 ill.

Engineering

The invention relates to a defrosting device for controlling the operation of the defrosting of the evaporators, respectively, associated with the freezing and refrigerating chambers of the refrigerator, and method of operating such a defrosting device.

Prior art

An example of such a defrosting device for a refrigerator is provided in the publication of Japanese laid out the application for a utility model N 56-149859, published November 10, 1981, the Defrosting device, disclosed in this publication includes a reservoir connected in parallel to the intake pipe connecting between the evaporator of the refrigerator, solenoid valve, located in the same pipe coming out of the tank, and the timer is designed to supply termination power to the compressor of the refrigerator when , is when the compressor is carried out within a certain period of time.

Another defrosting device disclosed in the publication of Japanese laid out the application for a utility model N 56-1082, published January 7, 1981, That the defrosting device includes electric heaters located in the immediate vicinity of the inlet and the evaporator. Above and below the evaporator are thermal switches for controlling electric heaters. Thermal switches are configured to the same temperature.

In Fig. 1 shows a typical refrigerator having a conventional structure, and Fig. 2 shows a refrigeration cycle used in this refrigerator. As shown in Fig. 1, the refrigerator includes a body 1 of the refrigerator, equipped with cameras for storage of products, namely, the freezing chamber 2 and the refrigerating chamber 3. In the front part of the body 1 of the refrigerator is installed door 2 and which are designed to open and close the freezing and refrigerating chambers 2 and 3, respectively.

Between the freezing and refrigerating chambers 2 and 3 is the evaporator 4, which performs heat exchange between air injected into the freezing cold and the latent heat of the air while cooling. On the rear side of the evaporator 4 has a fan 5A, the rotation of which provides the electric motor 5 fan to circulate cold air is brought into heat exchange by the evaporator 4 through the freezing and refrigerating chambers 2 and 3.

To control the amount of cold air supplied to the refrigerating chamber 3, is provided by the damper 6, which allows cold air in the refrigerating chamber 3 or stops the flow of cold air in accordance with the internal temperature of the refrigerating chamber 3. As in the freezing and refrigerating chambers 2 and 3 separately are lots of shelves 7 for the separation of cells into several compartments for food storage.

In the respective rear parts of the freezing and refrigerating chambers 2 and 3 with the channel elements 8 and 9, which guide the flow of cold air involved in the heat exchange by the evaporator 4 so that these threads get into and circulate through the freezing and refrigerating chambers 2 and 3. The freezing and refrigerating chambers 2 and 3 have openings 8A and 9a for air release, respectively. Through these holes 8A and 9a for venting the flow of cold air directed channels 2 and 3.

In the lower part of the body 1 of the refrigerator has a compressor 10 for compressing gaseous low temperature low pressure refrigerant leaving the evaporator 4, to obtain the high-temperature high-pressure refrigerant. On the front side (left when viewed in Fig. 1) the compressor 10 is also the pallet 11 to melt water. The pallet 11 to melt water collected (dropwise) water, resulting from the air blowing fan 5A, after cooling in the heat exchange at the evaporator 4, and the water (ice water), obtained after thawing of the frost formed on the inside of the refrigerator, and it was poured out of the fridge.

Under the tray 11 for melt water is an auxiliary condenser 12 for evaporation of water collected in the sump 11 for melt water. The main condenser 13, which has the form of zigzag tubes located on both side walls 1A, the upper wall 1b and the rear wall of the body 1 of the refrigerator. Through the main condenser 13 is gaseous high-temperature high-pressure refrigerant compressed by the compressor 10. While passing through the main condenser 13, the gaseous refrigerant carries out heat exchange with the ambient air in the line is Ecodom in the liquid phase at low temperature and high pressure.

On one side of the compressor 10 is installed capillary tube 14. Capillary tube 14 serves to sudden expansion in the liquid phase of low-temperature high-pressure refrigerant, condensed the main condenser 13, thereby reducing the pressure of the refrigerant to the evaporation pressure. Around the front wall of the body 1 of the refrigerator is antiflamitory tube 15 to prevent the formation of droplets of moisture due to temperature difference between the surrounding warm air and cold air present in the body 1 of the refrigerator.

To start the refrigerator in operation, the user includes the power switch after setting the desired temperatures of the freezing and refrigerating chambers 2 and 3. Immediately after plugging in the fridge in the network supply temperature of the freezing chamber 2 starts to measure a temperature sensor mounted in the freezing chamber 2. The temperature sensor outputs a signal corresponding to the measured temperature to the control unit (not shown), which, in turn, determines exceeds or not the measured temperature is the set temperature.

When the temperature in the freezing chamber 2 exceeds the set temperature, include the computer the fan 5A.

When powered compressor 10, the refrigerant is compressed in the gas phase at high temperature and pressure. Then, this refrigerant is served in the auxiliary capacitor 12. When passing through the auxiliary condenser 12, the refrigerant vaporizes the water collected in the sump 11 for melt water. Then the refrigerant enters the main condenser 13. Passing through the main condenser 13, the refrigerant performs heat exchange with the ambient air in accordance with the phenomenon of natural or forced convection, resulting cooled with the transition into the liquid phase at low temperature and high pressure.

Located in the liquid phase low-temperature high-pressure refrigerant that is condensed in the tube 13 of the main capacitor reaches in antiflamitory pipe 15. Passing through antiplatelet pipe 15, the refrigerant undergoes a phase transition from a more or less high temperature by approximately 6 - 13oC. as a result preventing the formation of moisture in the refrigerator. Then in the liquid phase low-temperature high-pressure refrigerant passes through the capillary tube 14, which is designed to expand the refrigerant, thereby reducing its pressure to the pressure the UNT, emerging from the capillary tube 14, enters the evaporator 4.

When passing through the evaporator 4, which consists of many tubes, low-temperature high-pressure refrigerant carries out heat exchange with the ambient air. Due to this heat exchange, the refrigerant is evaporated while cooling. The resulting gaseous low temperature low pressure refrigerant leaving the evaporator 4, and then is introduced into the compressor 10. Thus, the refrigerant re-circulates in the refrigeration cycle, as shown in Fig. 2.

On the other hand, cold air, involved in heat transfer of the evaporator 2, is pumped through the rotational effort of the fan 5A and routed channel elements 8 and 9 so that comes in the freezing and refrigerating chambers 2 and 3 through the openings 8A and 9a for the release of cold air.

With the help of cold air produced in the freezing and refrigerating chambers 2 and 3 through the openings 8A and 9a for the release of cold air, the internal temperature in the freezing and refrigerating chambers 2 and 3, respectively, are gradually being reduced to a certain level.

During the production of cold air flap 6, the arrangement is the basis of variable internal temperature of the refrigerating chamber 3, so in the refrigerating chamber 3 is maintained the proper temperature.

As apparent from the above description, in the above conventional refrigerator uses a control system designed to control the internal temperatures of the freezing and refrigerating chambers 2 and 3 on the basis of the internal temperature of the freezing chamber 2. That is, this temperature control carried out so that the compressor 10 and the electric motor 5 fan included for circulation of cold air through the freezer 2 when the internal temperature of the freezing chamber 2 above the set temperature, but turned off to stop the flow of the cooling air in the freezing chamber 2, when the internal temperature of the freezing chamber 2 does not exceed the set temperature.

Although to control the compressor 10 is used only the internal temperature of the freezing chamber 2, the conventional refrigerator has a lot of different problems. For example, the internal temperature of the freezing chamber may be at a low level even when the internal temperature of the refrigerating chamber unexpectedly exceeded prescribed for her level due to overload of the refrigerating chamber or increased to the ATA internal temperature of the refrigerating chamber 3 is constantly increasing, so the food stored in the refrigerating chamber can easily be damaged. Therefore, the reliability is reduced.

In conventional refrigerators, including one evaporator 4 and one fan 5A, the moisture present in the air and blowing fan 5A, freezes on the evaporator when the air is cooled by the cooling agent passing through the evaporator 4.

To thaw the frost formed on the evaporator 4, a heater (not shown) serves the power supply. When the heater is heated, the frost on the evaporator 4 melts, and then flows into the sump 11 for melt water located in the lower part of the body 1 of the refrigerator.

Although more or fewer frost formed on the evaporator is removed when the defrosting frost, melt water is obtained between adjacent rods of the evaporator, still linked with the evaporator 4 due to its cohesion. This melt water is frozen by cold air, involved in heat transfer in the evaporator, thereby reducing the heat transfer capability of the evaporator. In addition, it may freeze and the evaporator. In this case, damage can occur evaporator.

In order to solve these problems, recently was offered another fridge that has the a defrosting operation to remove frost, formed on the evaporators can be done for these evaporators separately. However, this increases the period of downtime of the compressor, since the defrosting operation for the freezing and refrigerating chambers are executed sequentially. For this reason, it is difficult to maintain in the refrigerating chamber temperature below a certain temperature.

A brief statement of the substance of the invention

The objective of the invention is to solve the aforementioned problems and to develop the defrosting device for a refrigerator and a control method that the defrosting device in which the cooling chamber is cooled regardless of the internal temperature of the freezing chamber when the temperature of the refrigerating chamber exceeds the desired temperature and maintain the temperature of the refrigerating chamber below the set temperature.

Another objective of the present invention is to develop a defrosting device for a refrigerator and a control method that the defrosting device in which the defrosting operation is carried out in accordance with the times of the compressor and fan of the refrigerating chamber, when the internal temperature of the refrigerating chamber in order to increase the cooling efficiency.

Another object of the invention is to develop a defrosting device for a refrigerator and a control method that the defrosting device in which the time when the operation begins defrosting, determined on the basis of conditions at ambient temperature, to increase the efficiency of the defrost.

Another object of the invention is to develop a defrosting device for a refrigerator and a control method that the defrosting device in which the operation of defrosting the freezer delay, when the defrosting operation of the refrigerating chamber finish within a specified time when defrosting the freezer, to the operation of the defrosting of the freezing and refrigerating chambers to run simultaneously.

Another object of the invention is to develop a defrosting device for a refrigerator and a control method that the defrosting device in which the operation of the defrosting of the freezing and refrigerating chambers are at the same time, regardless of the conditions of defrosting of the refrigerating chamber, when the freezer is in defrost for povysheniya device for a refrigerator and a control method that the defrosting device, in which the operation of the defrosting of the freezing and refrigerating chambers are at the same time, regardless of the conditions, requiring defrost the freezer when the freezer is in need of defrosting, to improve cooling efficiency.

Another object of the invention is to develop a defrosting device for a refrigerator and a control method that the defrosting device in which rapid cooling of the time when operation begins defrosting of the refrigerating chamber, accurately determined by calculating the gradient of the temperature drop on the basis of changes in the internal temperature of the coolant chamber to improve the efficiency of the defrost.

Another object of the invention is to develop a defrosting device for a refrigerator and a control method that the defrosting device that allows for quick freezing a moment in time when operation begins defrosting of the refrigerating chamber, accurately determined by calculating the gradient of the temperature drop on the basis of changes in the internal temperature of the freezing chamber to improve the efficiency of the defrost.

In accordance with another aspect, the present invention provides a method of controlling the defrosting of the refrigerator, namely, that determine the temperature corresponding to the desired temperature of the freezing and refrigerating chambers by means of set temperatures of the freezing and refrigerating chambers, reducing the corresponding internal temperatures of the freezing and refrigerating chambers to a predetermined temperature by the compressor and means of ventilation freezer and refrigeration mperature, given the task tool temperature freezers, determine the temperature of the refrigerating chamber when the compressor is running, when specified internal temperature of the freezer and exceeds the desired temperature, and then determine, exceeds or not the internal temperature of the refrigerating chamber to the desired temperature set by means of the set temperature of the refrigerating chamber include means for venting the refrigerating chamber, when the internal temperature of the refrigerating chamber exceeds the desired temperature set by means of the set temperature of the refrigerating chamber, and the lower the internal temperature of the refrigerating chamber, turn off the tool ventilation of the refrigerating chamber, when the internal temperature of the refrigerating chamber lower than the temperature set by means of the set temperature of the refrigerating chamber, include means for venting the freezer when the internal temperature of the refrigerating chamber below the temperature set by means of the set temperature of the refrigerating chamber, after the enabling and disabling means of ventilation of the refrigerating chamber, measure the temperature of the refrigerating chamber with the compressor off and the vehicle ventilation freezers, coseley camera, and then measure the internal temperature of the refrigerating chamber, determine the temperature of the refrigerating chamber and find out whether the internal temperature of the refrigerating chamber set temperature stored in the management tool, define, expired, whether the set time of the refrigerating chamber in a state where the internal temperature of the refrigerating chamber exceeds the set temperature determine the time-of-band compressor and means of ventilation of the refrigerating chamber when the specified time of their inclusion has expired, and then calculate the time means of ventilation of the refrigerating chamber, determine the total on-time means of ventilation of the refrigerating chamber and specify, whether it exceeded the set time stored in the management tool, specify time of inclusion means of ventilation of the refrigerating chamber and precise, less is it than the set time stored in the management tool, and then determine, exceeds or not the total time the compressor set the total time, stored in the control unit? include a means of heating the evaporator of the refrigerating chamber for heating, when the total turn-on time exceeds the total time and defrost ipgrave evaporator of the refrigerating chamber, determine the temperature of the pipe of the refrigerating chamber to determine whether the temperature of the piping of the evaporator of the refrigerating chamber set temperature of the pipeline, stored in the management tool.

In accordance with another aspect, the present invention provides a method of controlling the defrosting operation of the refrigerator, namely, that counts the time the compressor and the corresponding times incorporating ventilation freezing and refrigerating chambers, define the conditions requiring the implementation of defrosting the evaporator of the freezing and refrigerating chambers, on the basis of the on-time of the compressor and means of ventilation freezing and refrigerating chambers, conduct defrost to remove frost formed on the evaporator of the freezing and refrigerating chambers, in accordance with the conditions of defrosting the evaporator of the freezing and refrigerating chambers; to determine the end of the defrost measure the temperature of the piping of the evaporator of the freezing and refrigerating chambers, changing during the defrosting operation, and determine, or not fully removed the frost on the evaporator of the freezing and refrigerating chambers, on the basis of isparent the method of controlling the defrosting operation of the refrigerator, namely, that calculates the on-time means of ventilation cooling chamber in accordance with the operation mode of the refrigerator, changing during operation of the fan of the refrigerating chamber, determine the conditions, requiring defrosting of the evaporator of the refrigerating chamber on the basis of on-time means of ventilation of the refrigerating chamber, calculate the on-time means of ventilation freezer when the fan freezer included in accordance with the internal freezer temperature, determine the conditions requiring defrosting of the evaporator freezer on the basis of on-time means of ventilation freezers, calculated at the stage of determining on-time means of ventilation freezers, and at the same time defrost to remove frost formed on the evaporator of the freezing and refrigerating chambers, when it is determined that the evaporator of the refrigerating chamber is in need of defrosting.

In accordance with another aspect, the present invention provides a method of controlling the defrosting operation of the refrigerator, namely, that for rapid cooling measure is strictly cooling measure the internal temperature of the refrigerating chamber, which is changed at predetermined intervals when calculating on-time means of ventilation of the refrigerating chamber, determine the changes of the gradient of the temperature drop corresponding to the change of the internal temperature of the refrigerating chamber relative to the initial temperature, determine the start of the defrosting of the evaporator of the refrigerating chamber, on the basis of temperature changes, perform the defrosting of the evaporator of the refrigerating chamber in accordance with the start of defrosting.

In accordance with another aspect, the present invention provides a method of controlling the defrosting operation of the refrigerator, namely, that provide cooling, powering the compressor on the basis of the internal temperature of the freezing chamber, and driving means ventilation cooling chambers with respective internal temperatures of the freezing and refrigerating chambers, measure the internal temperature of the freezing and refrigerating chambers, changing during cooling during normal operation, determine whether the freezing and refrigerating chambers in the abnormal temperature condition on the basis of the th and refrigerating chambers, measure the internal temperature of the freezing and refrigerating chambers, changing after incorporating ventilation freezing and refrigerating chambers simultaneously with the compressor, determine the points in time when the start operation of the defrosting of the freezing and refrigerating chambers, based on the respective times incorporating ventilation freezing and refrigerating chambers and on-time of the compressor when the temperature of the freezing and refrigerating chambers exceeding a prescribed temperature and carry out the defrosting of the evaporator of the freezing and refrigerating chambers, respectively, in accordance with the moments of the beginning of the defrost.

Brief description of drawings

Other objectives and aspects of the invention will become apparent from the description of a specific embodiment variants of the invention with reference to the accompanying drawings, in which:

Fig. 1 depicts a General view of a typical refrigerator with a partial tear-out;

Fig. 2 is a schematic diagram illustrating a refrigeration cycle used in a known refrigerator;

Fig. 3 - the fridge (longitudinal section), which used the defrosting device corresponding to the present invention;

Fig. 4 - when is it device, according to the present invention;

Fig. 6A-6C sequence of operations of the method of controlling the defrosting of a refrigerator according to the first variant embodiment of the present invention;

Fig. 7A-7C is a sequence of operations of the method of controlling the defrosting of a refrigerator according to the second variant embodiment of the present invention;

Fig. 8A-8B is a sequence of operations of a method of controlling the defrosting of a refrigerator according to a third variant embodiment of the present invention; and

Fig. 9A-9B - sequence method of controlling the defrosting of a refrigerator according to the fourth variant embodiment of the present invention.

Detailed description of the invention

In Fig. 3 shows the fridge, which used the defrosting device corresponding to the present invention. On the other hand, in Fig. 4 illustrates a refrigeration cycle used in this refrigerator.

The refrigerator includes a housing 20 (Fig. 3) refrigerator, divided vertically intermediate partition wall 21 into two chambers - freezing compartment 22 and the cooling chamber 24. In the front part of the body 20 of the refrigerator is installed doors 22A and 24A which case holodilina cameras 22 and 24 serve as chambers for food storage, respectively.

In the rear part of the freezing chamber 22 is installed evaporator 26 freezers, which performs heat exchange between air injected into the freezing chamber 22, and the refrigerant passing through the first evaporator 26, vaporizing the refrigerant through the warm air while cooling of the air. Over the evaporator 26 of the freezing chamber fan is 30 freezer. The fan 30 freezers driven by a motor 28 of the fan for the implementation of the circulation of cold air, involved in heat transfer of the evaporator 26 in the freezing chamber 22.

Before the evaporator 26 in the rear part of the freezing chamber 22 is channel element 32, which serves to guide the flow of cold air, involved in heat transfer of the evaporator 26. This air circulates through the freezing chamber 22 under the action of the fan 20 freezer. Channel element 32 of the freezing chamber is provided with a hole 32A for discharge of the air through which cold air is directed to the channel element 32 freezer after heat exchange in the evaporator 26 is introduced into the freezing chamber 22.

Under the evaporator 26 freezer to the e 26 freezers, when the air blowing fan 26 of the freezing chamber is cooled by the refrigerant passing through the evaporator 26 freezers.

Lower heater 33 freezers is the pallet 34 to melt water, which is required for the evaporator 26 freezers. The pallet 34 is going to melt water, and then drained through the drain hose 52 to the evaporator tray 54, located at the bottom of the body 20 of the refrigerator. At the front side of the fan 30 freezer is thermistor 37 for measuring the internal temperature Tf of the freezing chamber 22. thermistor 36 is a block 111 temperature measurement unit 110 temperature measurement, which is included in the defrosting device which will be described below.

On the other hand, on the rear side of the refrigerating chamber 24 has an evaporator of the refrigerating chamber 40. The evaporator of the refrigerating chamber 40 carries out heat exchange between the air pumped into the cooling chamber 24, and the refrigerant passing through the evaporator of the refrigerating chamber 40. The refrigerant evaporates from warm air while cooling of the air. Over the evaporator of the refrigerating chamber 40 to the rotating shaft of the electric motor 42 ventilationen for circulation of cold air, involved in the heat exchange by the evaporator 40 of refrigerant in the refrigeration chamber 24.

Before the evaporator of the refrigerating chamber 40 is channel element 46 of the refrigerating chamber, which serves to guide the cold air involved in the heat exchange by the evaporator of the refrigerating chamber 40, so that the air circulates through the refrigeration chamber 24 due to the rotational effort of the fan 44 of the refrigerating chamber. Channel element 46 of the refrigerating chamber is provided with a hole 46a for air release. Through the opening 46a for exhaust, cold air is directed channel element 46 of the refrigerating chamber into the cooling chamber 24.

Under the evaporator of the refrigerating chamber 40 is another heater 47. The heater 47 generates heat to remove frost formed on the evaporator of the refrigerating chamber 40, when the air blowing fan 44 of the refrigerating chamber, is cooled by the refrigerant passing through the evaporator of the refrigerating chamber 40.

Below the heater 47 is another pallet 48 for the drops of melt water, which is required for the evaporator of the refrigerating chamber 40. Pallet 48 collects melt water, and then drain the collected water through the drain hose 52 to the evaporator under the one thermistor 50 for measuring the internal temperature Tr of the refrigerating chamber 24. thermistor 50 is a block 112 measure the temperature of the refrigerating chamber unit 110 temperature measurement, which will be described below.

In the lower part of the body 20 of the refrigerator is the compressor 56 to compress gaseous low temperature low pressure refrigerant leaving the evaporator 26 and 40 of the freezing and refrigerating chambers, obtaining high-temperature high-pressure refrigerant. In the rear of the body 20 of the refrigerator is the main condenser 58. Through the main condenser 58 passes gaseous high-temperature high-pressure refrigerant compressed by the compressor 56. When passing through the main condenser 58 gaseous refrigerant carries out heat exchange with the ambient air in accordance with the phenomenon of natural or forced convection, resulting forcibly cooled with the transition into the liquid phase at low temperature and high pressure.

Under evaporative tray 54 is an auxiliary capacitor 60 to the evaporation of water collected in the evaporation tray 54. As in the freezing and refrigerating chambers 22 and 24 are lots of shelves 62 for separating cells into multiple compartments for storing dilego cycle, it is shown in Fig. 4. That is, high-temperature high-pressure refrigerant compressed by the compressor 56 and is fed in the auxiliary capacitor 60. Passing through the auxiliary condenser 60, the refrigerant heats the water in the evaporation tray 54 and vaporizes it. Of the auxiliary capacitor 60, the refrigerant then enters the main condenser 58. Passing through the main condenser 58, the high-temperature high-pressure refrigerant is cooled so that it can be liquefied with obtaining low temperature low pressure refrigerant. The refrigerant leaving the main condenser 58, and then passes through the capillary tube 57, which reduces the pressure of the refrigerant. Then, the refrigerant returns to the compressor 56 after passing through the evaporators 26 and 40 of the freezing and refrigerating chambers.

Described in detail below freezing device corresponding to the present invention, applied in the refrigerator having the above construction.

Freezing device includes a block 90 (Fig. 5) DC power supply for converting a voltage from a commercial source of AC power supplied to the power input cascade changes the units of the refrigerator.

You can also block 100 of temperature setting, which is a rocker switch, which manipulates the user to set the desired internal temperature Tfs and Trs freezing and refrigerating chambers. Block 100 job includes temperature unit 101 set temperature of the freezer, designed to set the desired internal temperature Tfs of the freezing chamber 22 and the block 102 of the set temperature of the refrigerating chamber, designed to set the desired internal temperature Trs cooling chamber 24. Block 101 set temperature of the freezing chamber is also used to select the fast freezing, while the block 102 of the set temperature of the refrigerating chamber is also used to select the operation quick cooling.

Block 110 temperature measurement, which is also included in the defrosting device is used for measurement of internal temperatures Tf and Tr of the freezing and refrigerating chambers 22 and 24. This block 110 temperature measurement includes the block 111 measuring the temperature of the freezing chamber, which contains thermistor 36 for measuring the internal temperature Tf of the freezing chamber 22, and the block 112 measure the temperature of the refrigerating chamber, to arivudai the device also includes a control unit 120, which is a micro-computer. The control unit 120 receives the DC voltage from block 90 DC power and supplies it to the fridge. The control unit 120 also receives output signals from the block 110 temperature measurement that reflects the corresponding measured internal temperature Tf and Tr, and determines exceed if the measured internal temperature Tf and Tr the desired temperature Tfs and Trs defined by block 100 of temperature setting. On the basis of the obtained result, the control unit 120 controls the overall operation of the refrigerator. The control unit 120 also controls the operation of the defrosting of the freezing and refrigerating chambers 22 and 24. To implement this control, the control unit 120 determines the time required to defrost the evaporators 26 and 40 of the freezing and refrigerating chambers, on the basis of the operating time of the compressor 56 and the respective times of operation of the fan 30 and 44 of the freezing and refrigerating chambers, the respective internal temperatures Tf and Tr of the freezing and refrigerating chambers 22 and 24 and changes the operation mode of the refrigerator (in particular the transition from mode overload to the normal mode of operation and Vice versa).

To control the operation razmorozhenie of the refrigerating chamber 24, the control unit 120 also determines whether formed or not the frost on the evaporators 26 and 40 of the freezing and refrigerating chambers, based on the respective temperature gradients The temperatures Tf and Tr of the cameras.

To the control device 120 is connected to the block 130 of the actuator heaters. Block 130 of the actuator heater turns the heaters 33 and 47 associated with the evaporators 26 and 40 of the freezing and refrigerating chambers. Block 130 of the actuator heater includes a heater 33 and 47, when the control unit 120 determines whether to defrost the evaporators 26 and 40 of the freezing and refrigerating chambers, on the basis of the operating time of the compressor 56 and the inclusion of the fan 30 and 44 of the freezing and refrigerating chambers, the respective temperatures Tf and Tr of the freezing and refrigerating chambers 22 and 24 and the corresponding temperature gradients The temperatures Tf and Tr of cells that occur during rapid freezing or cooling. Block 130 of the actuator heaters includes the block 131 of the actuator heater freezer to turn on the heater 33 of the evaporator of the freezing chamber, which is located under the evaporator 26 of the freezing chamber, for removing frost formed on the evaporator 26 of the freezing chamber when the flow control signal from the control unit is a soaring glider 40 of the refrigerating chamber, to remove frost formed on the evaporator of the refrigerating chamber 40, when a signal is sent from the control unit 120.

The defrosting device also includes block 140 measuring temperature pipelines, designed to measure the respective temperatures of P1 and P2 pipelines evaporators 26 and 40 of the freezing and refrigerating chambers, i.e., the respective temperatures of the flows of the refrigerant passing through the evaporator 26 and 40 when turning on the heaters 33 and 47, and the subsequent sending of the received data about the temperature of the piping to the control unit 120, so that the control unit 120 may determine whether the termination of the defrosting of the evaporators 26 and 40. Block 140 measuring temperature pipelines includes block 141 temperature measurement pipe freezer designed for temperature measurement P1 evaporator 26 freezers, changing when turning on the heater 33 of the evaporator of the freezing chamber, and to transfer the received data reflecting the measured temperature P1 of the pipeline, the control unit 120, and the block 142 temperature measurement P2 piping of the evaporator of the refrigerating chamber 40, changing when turning on the heater 47 of the evaporator of the refrigerating chamber, and PE is To the control unit 120 is also connected unit 150 to drive the compressor. Block 150 drive unit receives the control signal from the control unit 120, developed on the basis of the difference between the desired chamber temperature Tfs or Trs, given consumer with the help of block 100 set temperature, and the temperature Tf or Tr cameras, measured by block 110 temperature measurement. In accordance with the signal control unit 150 of the drive unit controls the compressor 56 to cool the refrigerator.

In Fig. 5 position 160 denotes a drive unit fan motors, which serves to control the motors 28 and 42 fans of the freezing and refrigerating chambers under control of the control unit 120 so that the respective internal temperatures Tf and Tr of the freezing and refrigerating chambers 22 and 24 are maintained at desired levels specified by the consumer. Block 160 drive fan motors includes unit 161 of the drive of the fan motor freezer designed for motor control 28 fan freezer, which circulates cold air, involved in heat transfer of the evaporator 26 freezers, under control of the control unit 120 to maintain internal s, specified by the user, and the block 162 of the drive of the fan motor of the refrigerating chamber, designed for motor control 42 fan of the refrigerating chamber, which circulates cold air involved in the heat exchange by the evaporator of the refrigerating chamber 40, under control of the control unit 120 to maintain the internal temperature Tr of the refrigerating chamber 24, as measured in block 112 measure the temperature of the refrigerating chamber, at a desired level Trs specified by the user.

The following describes the operation of the defrosting device having the above construction, to defrost the refrigerator.

In Fig. 6A-6C presents the flow diagrams illustrating the sequence of operations of a method of controlling the defrosting of a refrigerator in accordance with a first variant embodiment of the invention.

After supplying power to the refrigerator, block 90 DC power supply converts the AC power received from the commercial power source AC power input cascade of alternating current (not shown), the DC voltage with a voltage level required to enable various Blackline 120, as well as on various schemes of the drive.

In step S1 shown in Fig. 6A, the control unit 120 causes the fridge pre-operational state in response to the DC voltage received from the block 90 DC power. In step S2 set the desired internal temperature Tfs and Trs in the freezing and refrigerating chambers 22 and 24, using the blocks 101 and 102 set temperatures of the freezing and refrigerating chambers block 100 of temperature setting.

Then, the procedure proceeds to step S3 to turn on the compressor 56. After that, in step S4 includes the fan 44 of the refrigerating chamber and the fan 30 freezer. After that, in step S5 determines whether the internal temperature Tr of the refrigerating chamber 24, as measured in block 112 measure the temperature of the refrigerating chamber, the desired room temperature Trs defined in the control unit 120.

If the internal temperature Tr of the refrigerating chamber 24 defined at the step S5 as exceeding the desired room temperature Trs (namely if the answer is "Yes" (YES), the procedure proceeds to step S6. In step S6 continues to operate the fan 44 of the refrigerating chamber for lowering the internal temperature of the refrigerating chamber 24. On the other hand, when the internal temperature Tr Kholodilin the O)), the procedure proceeds to step S7 to turn off the fan 44 of the refrigerating chamber.

When the compressor 56 and the fan 44 of the refrigerating chamber is turned off, and the fan 30 freezer is disabled, only the evaporator of the refrigerating chamber 40 can perform the heat exchange between the refrigerant and the ambient air. That is, the refrigerant compressed to the formation of the gaseous phase at high temperature and pressure out of the compressor 56 and is directed to the auxiliary capacitor 60. Passing through the auxiliary condenser 60, the refrigerant vaporizes the water collected in the evaporation tray 54. Then the refrigerant enters the main condenser 58. Passing through the main condenser 58, the refrigerant performs heat exchange with the ambient air in accordance with the phenomenon of natural or forced convection, resulting cooled with the transition into the liquid phase at low temperature and high pressure, i.e., the refrigerant is liquefied.

Located in the liquid phase low-temperature high-pressure refrigerant that is condensed in the main condenser 58, passes through the capillary tube 57. In the capillary tube 57, the refrigerant changes and becomes a low-temperature refrigerant low pressure the evaporators 26 and 40 of the freezing and refrigerating chambers.

Passing through the evaporators 26 and 40 of the freezing and refrigerating chambers, each of which consists of many tubes, low temperature low pressure refrigerant undergoes heat exchange with the air blown into the freezing and refrigerating chambers 22 and 24. Due to this heat exchange, the refrigerant is evaporated while cooling. The resulting flows of low-temperature gaseous refrigerant of low pressure, respectively, leaving the evaporators 26 and 40 of the freezing and refrigerating chambers, and then into the compressor 56. Thus, the refrigerant re-circulates in the refrigeration cycle shown in Fig. 4.

However, in this case there is no flow of air blown toward the freezing chamber 22, since it does not involve the fan 30 freezer. Therefore, the heat transfer at the evaporator 26 freezer does not occur. Heat transfer takes place in the evaporator of the refrigerating chamber 40.

Cold air involved with the evaporator of the refrigerating chamber 40 in heat exchange with the refrigerant, is pumped through the rotational effort of the fan 44 of the refrigerating chamber and is directed channel element 46 of the refrigerating chamber so that's released VA 24 is cooled.

On the other hand, if the fan 30 freezer works together with the compressor 56, realizing due to this cooling operation of the freezing chamber 22 within a certain period of time, the internal temperature Tf of the freezing chamber is gradually reduced. This internal temperature Tf of the freezing chamber 22 measures the block 111 temperature measurement freezer unit 110 temperature measurement. The received signal from the block 111 measuring the temperature of the freezing chamber and then supplied to the control unit 120.

After that, in step S8 determines, below or not the internal temperature Tf of the freezing chamber 22, as measured in block 111 than the target temperature Tfs.

When the internal temperature Tf of the freezing chamber 22 exceeds the target temperature Tfs (namely if the answer is "No"), returns to step S3. After this procedure is repeated from step S3 for continuous cooling of the freezing chamber 22. On the other hand, when the internal temperature Tf of the freezing chamber 22 is lower than the target temperature Tfs (namely, if Yes), the procedure proceeds to step S9 shown in Fig. 6V. In step S9, the control unit 120 generates a signal to stop the operation of the cooling morosi the ameres unit 160 of the drive motors of the fans.

Accordingly, the block 150 of the drive of the compressor shuts down the compressor 56. Block 161 of the drive of the fan motor freezer also disables the motor 28 of the fan freezers, stopping the fan 30 freezer. In the operation of the cooling of the freezing chamber 22 is completed.

As mentioned above, the compressor 56 is carried out in accordance with the internal temperature of the freezing chamber 22. When the compressor 56 is open from the beginning, the first is driven by the fan 44 of the refrigerating chamber. The fan control 44 of the refrigerating chamber is carried out in accordance with the internal temperature of the refrigerating chamber 24 so that it is possible to maintain the refrigerating chamber 24 at a desired temperature Trs. As soon as the internal temperature Tr of the refrigerating chamber 24 reaches the desired temperature Trs, the fan 44 of the refrigerating chamber is turned off, completing the cooling operation of the refrigerating chamber 24. At this time, the fan 30 freezer works. The compressor 56 and the fan 30 are continuously up until the internal temperature Tf of the freezing chamber 22 reaches the desired temperature Tfs.

Once inside the school camera off, to prevent peregorozhena freezing chamber 22.

In the normal operation mode for freezing freezer compartment 22 and the cooling of the refrigerating chamber 24, the procedure proceeds to step S10, in order to measure the abnormal temperature of the refrigerating chamber 24. In step S10 unit 112 measures the internal temperature Tr of the refrigerating chamber 24 and transmits the data to the control unit 120.

After that, in step S11 determines exceeds or not the internal temperature Tr of the refrigerating chamber 24 to the desired room temperature Trs (for example, about 8oC) stored in the control unit 120. When the internal temperature Tr of the refrigerating chamber 24 exceeds the desired room temperature Trs (namely, if Yes), the procedure proceeds to step S12, since the temperature in the refrigeration chamber 24 is suddenly increased. In step S12 determines that were supported or not cooling chamber 24 within a specified time (for example, about 30 minutes) in such condition that its internal temperature Tr exceeds the desired room temperature Trs.

If in step S12 it is determined that the preset time has not elapsed (namely, in case the answer is "No"), determines that the internal temperature of the refrigerating chamber 24 is suddenly increased vsledstvii is rotated to step S10. After this procedure is repeated from step S10.

On the other hand, if in step S12 it is determined that the specified time has elapsed (namely, if Yes), determines that the cooling chamber 24 is in an abnormal temperature condition. In this case, the procedure proceeds to step S13. In step S13, the control unit 120 outputs a signal at block 150 of the drive of the compressor, and at block 162 of the drive of the fan motor of the refrigerating chamber to cool the refrigerating chamber 24 regardless of the internal temperature Tf of the freezing chamber 22.

The signal control unit 150 of the drive of the compressor and the block 162 of the drive of the fan motor of the refrigerating chamber include the compressor 56 and the electric motor 42 fan of the refrigerating chamber, respectively. Therefore, the fan 44 of the refrigerating chamber rotates.

When the compressor 56 and the electric motor 42 fan of the refrigerating chamber, the cold air making heat exchange with the refrigerant in the evaporator of the refrigerating chamber 40, is blown into the cooling chamber 24 through the opening 46a for the release of cold air due to torque the efforts of the fan 44 of the refrigerating chamber.

Thereafter, the procedure proceeds to step S14 for the effect to 120.

To control the time of operation Cr fan 44 of the refrigerating chamber in step S15 determines that exceeds or no time on Cr calculated by the timer, set the time on Cs (for example, about 40 minutes), memorized in the control unit 120.

If in step S15 it is determined that the specified turn-on time Cs has not expired (i.e. if the answer is "No"), the procedure returns to step S14. After this procedure is repeated from step S14 when the continuous measurement of the internal temperature Tr of the refrigerating chamber 24. If in step S15 it is determined that the specified turn-on time Cs has elapsed (namely, if Yes), the procedure proceeds to step S16, in order to clarify the counted time on Cr fan 44 of the refrigerating chamber.

When cooling chamber 24 is in a state that its internal temperature Tr exceeds the desired room temperature Trs after cooling due to continuous operation (approximately 40 minutes) fan 44 of the refrigerating chamber, the procedure proceeds to step S17 to determine whether or not the increase of the internal temperature (namely, the abnormal temperature condition) of the refrigerating chamber 24 by the reduction of the heat exchange capacity of the evaporator 40 refrigeration is enable Crt fan 44 of the refrigerating chamber a specified time, the appropriate time (for example, hours b) compressor 56, causing the formation of frost on the evaporator of the refrigerating chamber 40.

If in step S17 it is determined that the total time on the Crt less than 6 hours (namely, in case the answer is "No"), conclude that the abnormal temperature condition of the refrigerating chamber 24 is not the result of the formation of frost on the evaporator of the refrigerating chamber 40. In this case, the procedure proceeds to step S10.

On the other hand, if the total time on the Crt determined in step S17 as to exceed 6 hours (namely, if Yes), determines that an abnormal temperature condition of the refrigerating chamber 24 is the result of the formation of frost on the evaporator of the refrigerating chamber 40. In this case, the procedure proceeds to step S18 shown in Fig. 6S. In step S18, the control unit 120 generates a control signal for stopping the cooling of the refrigerating chamber 24 in block 150 of the drive of the compressor and the block 162 of the drive of the fan motor of the refrigerating chamber.

On the basis of the signal from the control unit 120 unit 150 to drive the compressor and the block 162 of the drive of the fan motor of the refrigerating chamber shut down the compressor 56 and the electric motor 42, the fan is ecotricity the condition of the subcooling of the refrigeration chamber 24.

Then, in step S19, the control unit 120 outputs a signal in block 132 of the actuator heater cooling chambers to carry out the defrosting operation to remove frost formed on the evaporator of the refrigerating chamber 40.

Upon receipt of the control signal unit 132 of the actuator heater cooling chamber includes a heater 47 of the evaporator of the refrigerating chamber. As a consequence, the frost formed on the evaporator of the refrigerating chamber 40, is removed.

When the heater 47 of the evaporator of the refrigerating chamber generates heat, the unit 142 measures the temperature of the refrigerant passing through the evaporator of the refrigerating chamber 40. After that, the obtained data from the block 142 are received in the control unit 120. This procedure is performed in step S20.

After that, in step S21, the control unit 120 determines whether the temperature P2 piping of the evaporator of the refrigerating chamber 40, as measured by the block 142, the set temperature Prs memorized in the control unit 120 (namely, the temperature of end defrost, ensuring the complete removal of the frost formed on the evaporator of the refrigerating chamber 40). When the temperature P2 piping of the evaporator of the refrigerating chamber 40 below the set temperature Prs (and im the m case, the procedure returns to step S19. At step S19, the procedure is executed again.

On the other hand, when the temperature P2 piping of the evaporator of the refrigerating chamber is determined in step S21 as exceeding the specified temperature Prs (namely, if Yes), determines that the frost on the evaporator of the refrigerating chamber 40 is removed completely. In this case, the procedure proceeds to step S26. In step S26, the control unit 120 generates the control signal in block 132 of the actuator heater of the refrigerating chamber to stop the heat generation of the heater 47 of the evaporator of the refrigerating chamber.

This signal unit 132 of the actuator heater refrigeration camera disables the heater 47 of the evaporator of the refrigerating chamber, thereby stopping the defrosting of the evaporator of the refrigerating chamber 40.

After that, in step S23 determines expired if the specified pause time (namely, a preset time delay of about 10 minutes to protect the compressor 56) after defrosting of the refrigerating chamber 24. If the preset time has not elapsed (namely, if No), the procedure returns to step S27. At step S27, the procedure is repeated until then, until the specified pause time.

If the pause time has elapsed (namely, if the answer is "Yes"), include com is since its launch produced in compliance with the must pause.

On the other hand, when the internal temperature Tr of the refrigerating chamber 24 defined at the step S11 as lower than the desired temperature Trs (namely, if No), the procedure proceeds to step S24. In step S24 specify the time on Cr fan 44 of the refrigerating chamber, counted by the timer. After that, the refrigerator is completed.

Next will be described the method of controlling the defrosting of a refrigerator in accordance with a second alternative embodiment of the present invention.

Immediately after supplying power to the refrigerator, block 90 DC power supply converts the AC power received from the power source AC input power cascade of alternating current (not shown), the DC voltage with a voltage level required for the operation of various units of the refrigerator. Then the DC voltage from the block 90 DC power is supplied to the control unit 120, as well as on various schemes of the drive.

In step S31 (Fig. 7A), the control unit 120 causes the refrigerator in a pre-launch state. In step S32 determines powered compressor 56, or not. This is carried out when the internal temperature of the freezing chamber 22 lierature.

When in step S32 it is determined that the compressor 56 is turned on (namely, if Yes), the procedure proceeds to step S33. In step S33 determines whether the fan 44 of the refrigerating chamber. When the fan 44 of the refrigerating chamber is enabled (i.e. if the answer is "Yes"), perform step S34 to determine the time on Cr fan 44 of the refrigerating chamber by means of a timer.

Then in step S35 determines whether the fan 30 freezer. When the fan 30 freezer is not enabled (i.e. if the answer is "No"), the procedure returns to step S33. Then the procedure is executed again from the step S33.

If in step S35 it is determined that the fan 30 freezer included (namely, if Yes, perform step S36. In step S36 time on Cf fan 30 freezer is counted by the timer. Thereafter, the procedure proceeds to step S37 to determine whether the operation mode of the refrigerator operation with overload.

When the operation mode of the refrigerator is determined in step S37 as corresponding to the operation mode overload (namely, if Yes), the procedure proceeds to step S38. In step S38, the operation time of the Cf fan 30 freezer, is 2">

On the other hand, if the operation mode of the refrigerator is determined in step S3 7 as not corresponding to the operation mode overload (namely if the answer is "No"), the procedure proceeds to step S39. In step S39 time Cr fan 44 of the refrigerating chamber, calculated in step S34, take equal time Cn compressor 56 for operation of the cooling.

After that, in step S40 calculate the total operation time of the Ct compressor 56, summing the time Cn obtained in step S39, and the time Cm, obtained in step S38. Then in step S41 shown in Fig. 7B, define, exceeds or not the total operation time of the Ct compressor 56 preset time C1 (total time, for example, 10 hours of compressor 56, causing the formation of frost on the evaporator 26 freezers), memorized in the control unit 120.

If the total operating time of the Ct compressor 56 exceeds the specified time C1 (namely, if the answer is "Yes"), conclude that you should defrost the evaporator 26 freezers (that is, it is in conditions requiring defrosting). When defrosting of the evaporator 26 freezers simultaneously thawed the evaporator of the refrigerating chamber 40. For this purpose it is necessary to control the presence Ulema work Cr fan 44 of the refrigerating chamber, counted by the timer preset time C2 (namely, the total time (for example, about 9 hours) compressor 56, causing the formation of frost on the fan 40 of the refrigerating chamber.

When the counted time Cr fan 44 of the refrigerating chamber is determined in step S42 as exceeding the specified time C2 (namely, if Yes, perform step S43 to defrost the evaporators 26 and 40 of the freezing and refrigerating chambers. In step S43, the control unit 120 generates the control signal in block 150 of the drive of the compressor and in the blocks 161 and 162 of the drive motors fan of the freezing and refrigerating chambers block 160 drive fan motors to stop the cooling operation of the freezing and refrigerating chambers 22 and 24.

On the basis of the control signal from the control unit 120 unit 150 and blocks 161 and 162 shut down the compressor 57 and the electric motors 28 and 42 fans of the freezing and refrigerating chambers, respectively. The result stops the cooling operation of the freezing and refrigerating chambers 22 and 24.

After that, in step S44, the control unit 120 generates the control signal in both units 131 and 132 of the actuator heaters, freezers and cold rooms, in order to implement the operation of rathmalana the basis of the signal from the control unit 120 blocks 131 and 132 include heaters 33 and 47 of the evaporator of the freezing and refrigerating chambers. Accordingly, the frost formed on the evaporator 26 and 40 of the freezing and refrigerating chambers, removed due to the heat generated by the heaters 33 and 47 of the evaporator of the freezing and refrigerating chambers.

In step S45 temperature P1 piping of the evaporator 26 freezers, changing with the evolution of heat by the heater 33 of the evaporator, i.e. the temperature of the refrigerant passing through the evaporator 26 freezers, measuring unit 141 temperature measurement pipe freezer.

Then, in step S46, the control unit 120 determines whether the temperature P1 piping of the evaporator 26 of the freezing chamber set temperature Pfs (namely, the temperature of end defrost, ensuring the complete removal of the frost formed on the evaporator 26 freezers), memorized in the control unit 120. When the temperature P1 piping of the evaporator 26 of the freezing chamber is below a predetermined temperature Pfs (namely if the answer is "No"), determines that the frost on the evaporator 26 freezer not completely removed. In this case, the procedure returns to step S44. At step S44, the procedure is executed again.

On the other hand, when the temperature P1 pipeline Sporitelna evaporator 26 freezers removed completely. In this case, the procedure proceeds to step S47. In step S47, the control unit 120 generates the control signal in block 131 of the actuator heater freezer to stop the heat generation of the heater 33 of the evaporator freezer.

On this signal the block 131 of the actuator heater freezer turns off the heater 33 of the evaporator of the freezing chamber, thereby stopping the operation of the defrosting of the freezing chamber 22.

After that, in step S48 unit 142 measures the temperature P2 piping of the evaporator of the refrigerating chamber 40, namely, the temperature of the refrigerant passing through the evaporator of the refrigerating chamber 40 when the heater 47 of the evaporator of the refrigerating chamber generates heat. The data obtained from the block 142 temperature measurement pipe of the refrigerating chamber are received in the control unit 120.

Then, in step S49, the control unit 120 determines exceeded if the temperature P2 piping of the evaporator of the refrigerating chamber 40, as measured by the block 142, the set temperature Prs (namely the temperature of the end defrost, ensuring the complete removal of the frost formed on the evaporator of the refrigerating chamber 40). When the temperature P2 piping of the evaporator of the refrigerating chamber 40 namely not completely removed. In this case, the procedure returns to step S44. At step S44 the procedure is performed again.

On the other hand, when the temperature P2 piping of the evaporator of the refrigerating chamber 40 defined at the step S49 as exceeding the specified temperature Prs (namely, if Yes), determines that the frost on the evaporator of the refrigerating chamber 40 is removed completely. In this case, the procedure proceeds to step S50 (Fig. 7C). In step S50, the control unit 120 generates the control signal in block 132 of the actuator heater of the refrigerating chamber to stop the heat generation of the heater 47 of the evaporator of the refrigerating chamber.

On a signal from the control unit 120 unit 132 of the actuator heater refrigeration stops the heat from the heater 47 of the evaporator of the refrigerating chamber, thereby stopping the defrosting of the refrigerating chamber 24.

After that, in step S51 determines expired if the specified pause time (namely, a preset time delay, for example, about 10 minutes to protect the compressor 56) after thawing freezing and refrigerating chambers 22 and 24. If the preset time has not elapsed (namely, if No), the procedure returns to step S51. At step S51, the procedure is repeated up until necrocult compressor 56 for freezing freezer compartment 22 or cooling of the refrigerating chamber 24. In this case, the compressor 56 is not damaged, because sustained sufficient pause.

On the other hand, when in step S3 2 is determined that the compressor 56 works (namely, if Yes), determines that neither the freezer 22, no cooling chamber 24 is not in need of defrosting of the refrigerator. If the total time Ct of the compressor 56 is less than the specified time C1 (namely, in case the answer is "No") or freezer 22, no cooling chamber 24 are not in need of defrosting. Therefore, the control unit 120 does not exercise any control defrosting of the refrigerator.

If time Cr fan 44 of the refrigerating chamber is less than the specified time C2 (namely, in case the answer is "No"), determines that the freezer 22 requires defrosting, while the refrigeration chamber 24 defrosting is not required. In this case, the procedure proceeds to step S53. In step S53, the control unit 120 outputs a signal for stopping the cooling of the freezing and refrigerating chambers 22 and 24 in block 150 of the drive of the compressor 56 and blocks 161 and 162 of the drive motors fan of the freezing and refrigerating chambers.

On a signal from the control unit 120 unit otkluchayut the compressor 56 and the motors 28 and 42 fans of the freezing and refrigerating chambers, respectively. As a result, the cooling of the freezing and refrigerating chambers 22 and 24 is terminated.

Then, in step S54, the control unit 120 outputs a signal in the block 131 of the actuator heater freezer to make defrosting to remove frost formed on the evaporator 26 freezers.

On a signal from the control unit 120 unit 131 of the actuator heater freezer actuates the heater 33 of the evaporator freezer. Therefore, the frost formed on the evaporator 26 freezers, removed due to the heat emitted by the heater 33 of the evaporator freezer.

In step S55 temperature P1 piping of the evaporator 26 freezers, changing with the evolution of heat by the heater 33 of the evaporator of the freezing chamber, measuring unit 141 temperature measurement pipe freezer. The data obtained from the block 141 are received in the control unit 120. In step S56, the control unit 120 determines whether the temperature P1 piping of the evaporator 26 of the freezing chamber set temperature Pfs, memorized in the control unit 120.

When the temperature P1 piping of the evaporator 26 of the freezer is lower than the preset temperature . is this case, the procedure returns to step S54. At step S54, the procedure is executed again.

On the other hand, if the temperature P1 piping of the evaporator 26 of the freezing chamber exceeds the set temperature Pfs (namely if the answer is "Yes"), conclude that the frost on the evaporator 26 freezers removed completely. In this case, the procedure proceeds to step S57. In step S57, the control unit 120 generates the control signal in block 131 of the actuator heater freezer to turn off the heater 33 of the evaporator freezer.

On a signal from the control unit 120 unit 131 of the actuator heater freezer turns off the heater 33 of the evaporator of the freezing chamber, in result, the heater 33 is no longer generates heat. Defrosting of the freezing chamber 22 is terminated. Then in step S51 determines expired if the specified pause time after defrosting of the freezing chamber 22. Then the procedure is repeated from step S51.

Below is described the method of controlling the defrosting operation of the refrigerator in accordance with a third variant embodiment of the invention.

After supplying power to the refrigerator, block 90 DC that converts the supply voltage, porajenie DC voltage level, required for operation of the various blocks of the refrigerator. Then the DC voltage from the block 90 power is supplied to the control unit 120, as well as on various schemes of the drive.

In step S61 (Fig. 8A), the control unit 120 causes the refrigerator in a pre-launch state. In step S62 set the desired internal temperature Tfs and Trs freezing and refrigerating chambers 22 and 24 by means of blocks 101 and 102 set temperatures of the freezing and refrigerating chambers.

In step S63 determines whether the internal temperature Tf of the freezing chamber 22, as measured in block 111, the target temperature Tfs specified by the block 101 set temperature of the freezer.

If the internal temperature Tf of the freezing chamber 22 is lower than the target temperature Tfs (namely if the answer is "No"), the procedure returns to step S63. Then the procedure is repeated from step S63 for continuous measurement of the internal temperature Tf of the freezing chamber 22 as long as the temperature of the Tf will not exceed the target temperature Tfs.

When the current internal temperature Tf of the freezing chamber 22 exceeds the target temperature Tfs (namely, if Yes), the procedure proceeds to step S64. In step S64, the control unit 120 issues a control signal is CLASS="ptx2">

Then, in step S65 determines whether the current internal temperature Tr of the refrigerating chamber 24 to the desired room temperature Trs.

If the internal temperature Tr of the refrigerating chamber 24 exceeds the desired room temperature Trs, the procedure proceeds to step S66. In step S66, the control unit 120 outputs a signal to the block 162 of the drive of the fan motor of the refrigerating chamber to carry out a first cooling of the refrigerating chamber 24. On a signal from the control unit 120 turns on the electric motor 42 fan of the refrigerating chamber. In the cooling chamber 24 is cooled.

Then, the procedure proceeds to step S67 to count time Cr fan 44 of the refrigerating chamber by timer.

If the compressor 56 and the electric motor 42 fan of the refrigerating chamber is enabled and the motor 28 of the fan freezer when it is stopped, only the evaporator of the refrigerating chamber 40 can perform the heat exchange between the refrigerant and the ambient air. Thus, the refrigerant compressed with the formation of a gaseous phase at high temperature and pressure out of the compressor 56 in the direction to the auxiliary capacitor 60. Passing through the auxiliary condenser 60, hedgehog through the main condenser 58, the refrigerant carries out heat exchange with the ambient air by natural or forced convection, resulting cooled with the transition into the liquid phase at low temperature and high pressure, i.e., the refrigerant is liquefied.

Located in the liquid phase low-temperature high-pressure refrigerant that is condensed in the main condenser 58, and then passes through the capillary tube 57. Having capillary tube 57, the refrigerant is changed and becomes a low temperature low pressure refrigerant, so that it can evaporate easily. The refrigerant emerging from the capillary tube 57, and then enters the evaporators 26 and 40 of the freezing and refrigerating chambers.

Passing through the evaporators 26 and 40 of the freezing and refrigerating chambers, each of which consists of a set of pipes, low temperature low pressure refrigerant performs heat exchange with air blown into the freezing and refrigerating chambers 22 and 24. Thus, the refrigerant is evaporated while cooling. The resulting flows of low-temperature gaseous refrigerant of low pressure, respectively, leaving the evaporators 26 and 40, into the compressor 56. Thus, the refrigerant of pouta, injected toward the freezing chamber 22, since the fan is not running 30 freezer. Therefore, the heat transfer occurs only on the evaporator of the refrigerating chamber 40.

Cold air involved with the evaporator of the refrigerating chamber 40 in heat exchange with the refrigerant, is pumped through the rotational effort of the fan 44 of the refrigerating chamber and is directed channel element 46 of the refrigerating chamber so that's released into the cooling chamber 24 through the opening 46a for the release of cold air. In the cooling chamber 24 is cooled.

When the CPU 56 and the fan 44 of the refrigerating chamber, the block 112 temperature measurement measures the current internal temperature Tr of the refrigerating chamber 24 and transmits the data to the control unit 120.

In step S67, the timer included in the control unit 120, calculates the time Cr fan 44 of the refrigerating chamber. Thereafter, the procedure proceeds to step S68 to determine whether the operation mode of the refrigerator operation with overload, i.e., exceeded if the number of openings of the cooling chamber door a specified amount. When the operation mode of the refrigerator is determined in step S68 that the dir is r fan 44 of the refrigerating chamber, calculated in step S67, multiply by 2. The obtained value is taken for the time Cm of the compressor 56.

On the other hand, if the operation mode of the refrigerator is determined in step S68 as corresponding to the operation mode overload (namely if the answer is "No"), the procedure proceeds to step S70. In step S70 time Cr of the fan 44, calculated in step S67, equate to time Cm of the compressor 56.

After that, in step S71 to determine whether the time Cm compressor 56 preset time C1, for example, 10 hours of compressor 56, providing the formation of frost on the evaporator of the refrigerating chamber 40, stored in the control unit 120.

If the time Cm of the compressor 56 is less than the specified time C1 (namely, in case the answer is "No"), perform step S72 to determine whether less or no current temperature Tr of the refrigerating chamber 24 than the desired temperature Trs, the specified user.

When the current internal temperature Tr of the refrigerating chamber 24 exceeds the desired room temperature Trs, the procedure proceeds to step S66. To provide continuous cooling of the refrigerating chamber 24, the procedure is repeated from step S66.

On the other hand, when the current internal temperature T is l to stop the cooling of the refrigerating chamber 24 in block 162 of the drive of the fan motor of the refrigerating chamber. At the signal, the motor 42 of the fan cooling the camera is turned off, thereby stopping the cooling of the refrigerating chamber 24.

Thereafter, the procedure proceeds to step set S74 (Fig. 8B) for cooling the freezing chamber 22. At step set S74, the control unit 120 outputs a signal in block 161 of the drive of the fan motor freezer. On a signal from the control unit 120 is driven by the motor 28 of the fan freezer, which starts to rotate the fan 30 freezers, coupled with a rotating shaft of the electric Motor 28 and fan freezer. Then, in step S75, the timer counts the time Cr fan 30 freezer.

When the motor 28 of the fan freezer is working, the motor 42 of the fan cooling the camera is disabled, only the evaporator 26 of the freezing chamber can carry out heat exchange between the refrigerant and the ambient air. That is, the refrigerant compressed to the formation of the gaseous phase at high temperature and pressure out of the compressor 56 and is directed to the auxiliary capacitor 60. Passing through the auxiliary condenser 60, the refrigerant evaporates the water contained in the COI the refrigerant carries out heat exchange with the ambient air by natural or artificial convection, resulting cooled with the transition into the liquid phase at low temperature and high pressure, i.e., the refrigerant is liquefied.

Located in the liquid phase low-temperature high-pressure refrigerant that is condensed in the main condenser 58, and then passes through the capillary tube 57. In the capillary tube 57, the refrigerant is changed and becomes a low temperature low pressure refrigerant, so that it can evaporate easily. The refrigerant emerging from the capillary tube 57, and then enters the evaporators 26 and 40 of the freezing and refrigerating chambers.

Passing through the evaporators 26 and 40 of the freezing and refrigerating chambers, each of which consists of a set of pipes, low temperature low pressure refrigerant performs heat exchange with air blown into the freezing and refrigerating chambers 22 and 24. Thus, the refrigerant is evaporated while cooling. The resulting streams of gaseous low temperature low pressure refrigerant leaving the evaporator 26 and 40 of the freezing and refrigerating chambers, respectively, fall within the compressor 56. Thus, the refrigerant re-circulates in the refrigeration cycle shown in Fig. 4.

However, in wisewoman fan 44 of the refrigerating chamber. Therefore, the heat exchange is carried out only on the evaporator 26 freezers.

Cold air involved evaporator 26 of the freezing chamber in heat exchange with the refrigerant, is pumped by the fan 30 of the freezing chamber and is directed channel element 32 freezer so that it is available in a freezing chamber 22 through the opening 32A for the release of cold air. As a result of this freezer 22 is cooled.

If the fan 30 freezer works simultaneously with the compressor 56, thereby providing cooling of the freezing chamber 22 within a certain period of time, the internal temperature Tf of the freezing chamber 22 is gradually reduced. The temperature Tf of the freezing chamber 22 measures the block 111 measuring the temperature of the freezing chamber. Then the data from the block 111 are received in the control unit 120.

Then at step set s76 to determine whether the operation time of the Cf fan 30 freezers, counted by the timer preset time S1 stored in the control unit 120.

When the counted time enable Cf fan 30 freezer exceeds the specified time C1 (namely, if Yes, perform step S77 continue signal in block 150 of the drive of the compressor and in the blocks 161 and 162 of the drive motors fan of the freezing and refrigerating chambers, to stop the cooling of the freezing and refrigerating chambers 22 and 24.

On a signal from the control unit 120 unit 150 to drive the compressor and the blocks 161 and 162 of the drive motors fan of the freezing and refrigerating chambers shut down the compressor 56 and the motors 28 and 42 fans of the freezing and refrigerating chambers, respectively. As a result, the motors 28 and 42 fans of the freezing and refrigerating chambers are shut off, stopping the cooling of the freezing and refrigerating chambers 22 and 24.

Then, in step S78, the control unit 120 outputs a signal in both units 131 and 132 of the actuator heaters, freezers and cold rooms to carry out defrosting to remove frost formed on the evaporator 26 and 40 of the freezing and refrigerating chambers. On a signal from the control unit 120 blocks 131 and 132 of the actuator heaters freezing and refrigerating chambers operate the heaters 33 and 47 of the evaporator of the freezing and refrigerating chambers, respectively. As a consequence, the frost formed on the evaporator 26 and 40 of the freezing and refrigerating chambers is removed using heat generated by the heaters 33 and 47 of the evaporator of the freezing and refrigerating chambers.

In step S79 temperature P1 robobraille camera, measuring unit 141 temperature measurement pipe freezer unit 140 temperature measurements in pipelines. The received data is fed to the control unit 120. In step S80, the control unit 120 determines whether the temperature P1 piping of the evaporator 26 of the freezing chamber set temperature Pfs (namely the temperature of the end defrost, ensuring the complete removal of frost on the evaporator 26 freezers), memorized in the control unit 120. When the temperature P1 evaporator 26 of the freezing chamber is below a predetermined temperature Pfs (namely if the answer is "No"), conclude that the frost on the evaporator 26 freezer not completely removed. In this case, the procedure returns to step S78. At step S78, the procedure is repeated as long as the temperature of the P1 piping of the evaporator 26 of the freezing chamber reaches a predetermined temperature Pfs.

On the other hand, when the temperature P1 evaporator 26 of the freezing chamber exceeds the set temperature Pfs (namely if the answer is "Yes"), conclude that the frost on the evaporator 26 freezers removed completely. In this case, the procedure proceeds to step S81. In step S81, the control unit 120 outputs a signal in the block 131 of the actuator heater freezer ka the camera. On a signal from the control unit 120 unit 131 of the actuator heater freezer turns off the heater 33 of the evaporator of the freezing chamber, thereby stopping the operation of the defrosting of the freezing chamber 22.

After that, in step S82 unit 142 measures the temperature P2 piping of the evaporator of the refrigerating chamber 40, i.e., the temperature of the refrigerant passing through the evaporator of the refrigerating chamber 40. The received data is fed to the control unit 120. Then, in step S83, the control unit 120 determines whether the temperature P2 piping of the evaporator 40 of the refrigerating chamber set temperature Prs (namely the temperature of the end defrost, ensuring the complete removal of frost on the evaporator of the refrigerating chamber 40), memorized in the control unit 120. When the temperature P2 piping of the evaporator of the refrigerating chamber 40 below the set temperature Prs (namely, if the answer is "No"), conclude that frost formed on the evaporator of the refrigerating chamber 40, not removed completely. In this case, the procedure proceeds to step S78. At step S78, the procedure is repeated as long as the temperature of the P2 piping of the evaporator of the refrigerating chamber 40 reaches a predetermined temperature Prs.

On the other hand, when the tempera - if the answer is "Yes"), conclude that frost formed on the evaporator of the refrigerating chamber 40, is removed completely. In this case, the procedure proceeds to step S84. In step S84, the control unit 120 outputs a signal in block 132 of the actuator heater of the refrigerating chamber to stop the heat generation of the heater 47 of the evaporator of the refrigerating chamber. On the basis of the control signal from the control unit 120 unit 132 of the actuator heater refrigeration stops the heat from the heater 47 of the evaporator of the refrigerating chamber, thereby stopping the defrosting of the refrigerating chamber 24.

After that, in step S85 determine expired if the specified pause time, for example, about 10 minutes after the operation, the defrosting of the freezing and refrigerating chambers 22 and 24. If the preset time has not elapsed (namely, if No), the process from step S85 is repeated until then, until the specified pause time.

If the specified pause time has elapsed (namely, if the answer is "Yes"), you can re-enable the compressor 56. In this case, the compressor 56 is not damaged, because maintained proper pause. Therefore, the control unit 120 stops the defrosting of the refrigerator, and then, in step S86, clarifies counted braveries.

On the other hand, when at step set s76 is determined that the operation time of the Cf fan 30 freezer is less than the specified time C1 (namely, in case the answer is "No") or freezer 22, no cooling chamber 24 does not require defrosting. In this case, the procedure proceeds to step S87. In step S87 to determine, below or not the current internal temperature Tf of the freezing chamber 22, as measured in block 111 than the preset temperature Tfs stored in the control unit 120. When the internal temperature Tf of the freezing chamber 22 exceeds the set temperature Tfs (namely if the answer is "No"), the procedure returns to step set S74 to provide continuous cooling of the freezing chamber 22. With step set S74 procedure is executed again.

When the internal temperature Tf of the freezing chamber is lower than the preset temperature Tfs (namely, if Yes), the procedure proceeds to step S88. In step S88, the control unit 120 outputs a signal stopping the cooling of the freezing chamber 22 in block 150 of the drive of the compressor and the block 161 of the drive of the fan motor freezer.

On a signal from the control unit 120 unit 150 to drive the compressor and the block 161 of the drive of the fan motor freezer off hladina freezing chamber 22 is completed. Then, the procedure proceeds to step S63. Then the procedure is repeated from step S63.

Next will be described the method of controlling the defrosting operation of the refrigerator in accordance with the fourth alternative embodiment of the present invention.

Immediately after supplying power to the refrigerator, block 90 DC power supply converts the AC power received from the power source AC input power cascade of alternating current (not shown), the DC voltage with a voltage level required for the operation of various units of the refrigerator. Then the DC voltage is supplied to the control unit 120, as well as on various schemes of the drive.

In step S91 (Fig. 9A), the control unit 120 causes the refrigerator in a pre-launch state. In step S92 desired internal temperature Tfs and Trs freezing and refrigerating chambers 22 and 24 define using blocks 101 and 102 set temperature of the freezing and refrigerating chambers block 100 of temperature setting. Then, the procedure proceeds to step S93 to determine whether the fast cooling switch in the "On" position (ON). When the switch is rapid cooling is qualified in step S93 as being in the "On" position (the stewardship so, the fridge is in the standby mode of operation quick cooling. When the switch is rapid cooling qualifies

in step S93 as being in the "On" position (namely, if Yes), the procedure proceeds to step S94 for rapid cooling of the refrigerating chamber 24. In step S94, the block 112 measure the temperature of the refrigerating chamber measures the internal temperature of THE refrigerating chamber 24 at the time when operation begins rapid cooling. The received data is fed to the control unit 120. Thereafter, the procedure proceeds to step S95. In step S95, the control unit 120 outputs a signal for rapid cooling of the freezing chamber 24 and in block 150 of the drive of the compressor, and in block 162 of the drive of the fan motor of the refrigerating chamber. The signal is driven by the motor 42 fan of the refrigerating chamber, starts to rotate the fan 44 of the refrigerating chamber, connected with a rotating shaft of your motor.

If the compressor 56 and the fan 44 of the refrigerating chamber is on and the fan 30 freezer is disabled, only the evaporator of the refrigerating chamber 40 can perform the heat exchange between the refrigerant and the ambient air. That is, hedgerley to the auxiliary capacitor 60. Passing through the auxiliary condenser 60, the refrigerant vaporizes the water collected in the evaporation tray 54. Then the refrigerant enters the main condenser 58. Passing through the main condenser 58, the refrigerant performs heat exchange with the ambient air in accordance with the phenomenon of natural or forced convection, resulting cooled with the transition into the liquid phase at low temperature and high pressure, i.e., the refrigerant is liquefied.

Located in the liquid phase low-temperature high-pressure refrigerant that is condensed in the main condenser 58, and then passes through the capillary tube 57. In the capillary tube 57, the refrigerant is changed and becomes a low temperature low pressure refrigerant, so that it can evaporate easily. The refrigerant emerging from the capillary tube 57, and then enters the evaporators 26 and 40 of the freezing and refrigerating chambers.

Passing through the evaporators 26 and 40 of the freezing and refrigerating chambers, each of which consists of a set of pipes, low temperature low pressure refrigerant performs heat exchange with air blown into the freezing and refrigerating chambers 22 and 24. Due to this heat exchange, the refrigerant evaporates at although is skogo pressure, accordingly leaving the evaporators 26 and 40 of the freezing and refrigerating chambers, and then into the compressor 56. Thus, the refrigerant re-circulates in the refrigeration cycle shown in Fig. 4.

However, in the above case, there is no flow of air pumped in the direction of the freezing chamber 22, since it does not involve the fan 30 freezer. Therefore, the heat transfer at the evaporator 26 freezers no. Heat transfer takes place only on the evaporator of the refrigerating chamber 40.

Cold air involved with the evaporator of the refrigerating chamber 40 in heat exchange with the refrigerant, is pumped through the rotational effort of the fan 44 of the refrigerating chamber and is directed channel element 46 of the refrigerating chamber so that's released into the cooling chamber 24 through the opening 46a for the release of cold air. As a result of this operation is carried out rapid cooling of the refrigerating chamber 24.

Unit 112 measures the current internal temperature Tr of the refrigerating chamber 24, changing during the operation of the rapid cooling of the refrigerating chamber 24, carried out by actuation of the compressor 56 and the fan 44 of the refrigerating chamber. The data obtained postupat time fan 44 of the refrigerating chamber. Then, in step S97 define exceeds or not the counted time t of the measurement reference time is about 10 minutes required to change the internal temperature of the refrigerating chamber 24 during rapid cooling).

When the counted time Cr fan 44 of the refrigerating chamber exceeds the time t of the measurement (namely, if Yes), the procedure proceeds to step S98. In this step, the block 112 measure the temperature of the refrigerating chamber measures the internal temperature Tr of the refrigerating chamber 24 and outputs the received data to the control unit 120. Thereafter, the procedure proceeds to step S99 to determine whether to defrost the refrigerating chamber 24, that is, is a refrigerating chamber 24 in conditions requiring defrosting or not. In order to determine this, summarize the time Cr fan 44 of the refrigerating chamber, calculated during the operation of the rapid cooling, and the operating time of the fan 44 of the refrigerating chamber, calculated in the normal operation mode. Then determine whether the accumulated time the set time corresponding to the time of the operation, the calling defrosting of the evaporator of the refrigerating chamber 40.

If refrigerating chamber 24 qualificati "Yes"), at step S100. In step S100 determines whether the operating time of the fan 44 of the refrigerating chamber, calculated during the operation of the rapid cooling, the preset time (for example, about 20 minutes or more).

The reason determines, expired or not this specified time, is that at least two sets of data measurements required to calculate the gradient of The temperature drop corresponding to the change of the internal temperature of the refrigerating chamber 24, on the basis of the internal temperature Tr measured for each time t measurements to accurately determine the calculated gradient of The temperature drop.

When in step S100 is determined that the preset time has not elapsed (namely, if No), the procedure returns to step S96. At step S96, the following procedure is executed again. When the specified time has elapsed (namely, if Yes), the procedure proceeds to step S101. Because in this case it is possible to accurately calculate the change in internal temperature of the refrigerating chamber 24, in step S101 compute the gradient of The temperature drop during rapid cooling up to the current point in time.

Suppose that is her temperature is five, since the time t of the measurement is about 10 minutes in both cases.

Accordingly, the gradient of The temperature drop is calculated by determining the absolute magnitude of the difference between the data KZT5, about the internal temperature at the time when expired 50 minutes after the start of operation, rapid cooling, and data t0 on the internal temperature at the time when the operation is rapid cooling begins, followed by dividing the absolute value of the number of times of measurement, namely 5, which is expressed by the following equation:

TA = (T5-T0)/5...................... (1).

After computing the gradient of The temperature drop, as indicated above, the procedure proceeds to step S102 shown in Fig. 9B. In step S102 determines whether the gradient of The temperature drop of the reference gradient TaS, memorized in the control unit 120. If the gradient of The temperature drop exceeds the reference gradient TaS (namely, if Yes), the procedure returns to step S95, as the internal temperature Tr of the refrigerating chamber 24 normally decreases during the operation quick cooling. Then the procedure is repeated from step S95. On the other hand, when the gradient of The falling Temenos camera was covered with frost, since the internal temperature Tr of the refrigerating chamber 24 abnormally reduced during the fast cooling. In this case, the procedure proceeds to step S103. This step determines whether the time Cr fan 44 of the refrigerating chamber, counted by the timer preset time CrS (preset time rapid cooling of, for example, about 2 hours), stored in the control unit 120.

When the Cr fan 44 of the refrigerating chamber is less than the specified time CrS (namely if the answer is "No"), the procedure returns to step S95. Then the procedure is repeated from step S95. When the Cr fan 44 of the refrigerating chamber exceeds a specified time CrS (namely, if Yes), the procedure proceeds to step S104. In this step, the control unit 120 generates a signal to stop the rapid cooling of the refrigerating chamber 24 in block 150 of the drive of the compressor and the block 162 of the drive of the fan motor of the refrigerating chamber.

On a signal from the control unit 120 unit 150 to drive the compressor and the block 162 of the drive of the fan motor of the refrigerating chamber shut down the compressor 56 and the electric motor 42 fan of the refrigerating chamber, respectively. As a result of this Opera is S105. In this step S105, the control unit 120 outputs a signal in block 132 of the actuator heater cooling chambers to carry out the defrosting operation to remove frost formed on the evaporator of the refrigerating chamber 40.

On a signal from the control unit 120 unit 132 of the actuator heater cooling chamber includes a heater 47 of the evaporator of the refrigerating chamber. As a consequence, the frost formed on the evaporator of the refrigerating chamber 40, is removed.

When the heater 47 of the evaporator of the refrigerating chamber generates heat, measured the temperature of the refrigerant passing through the evaporator of the refrigerating chamber 40, i.e., the temperature P2 piping of the evaporator of the refrigerating chamber 40 by block 142. The data obtained from the block 142 temperature measurement pipe of the refrigerating chamber are held in the control unit 120. This procedure is performed in step S106. Then, in step S107, the control unit 120 determines whether the temperature P2 piping of the evaporator 40 of the refrigerating chamber set temperature PS (namely, the temperature of the end of the defrosting), memorized in the control unit 120. When the temperature P2 is lower than the preset temperature PS (namely if the answer is "No"), conclude that frost on operadora is carried out repeatedly until as the temperature of the P2 piping of the evaporator of the refrigerating chamber 40 reaches a predetermined temperature PS.

On the other hand, when the temperature P2 evaporator of the refrigerating chamber 40 exceeds the set temperature PS (namely if the answer is "Yes"), conclude that the frost on the evaporator of the refrigerating chamber 40 is removed completely. In this case, the procedure proceeds to step S108. In step S108, the control unit 120 outputs a signal in block 132 of the actuator heater of the refrigerating chamber to stop the heat generation of the heater 47 of the evaporator of the refrigerating chamber.

On a signal from the control unit 120 unit 132 of the actuator heater refrigeration camera disables the heater 47 of the evaporator of the refrigerating chamber, terminating the defrosting operation of the evaporator of the refrigerating chamber 40.

After that, in step S109 determines expired if the specified pause time (namely, a preset time delay, for example, about 10 minutes to protect the compressor 56) after the operation of the defrosting of the refrigerating chamber 24. If the pause time has elapsed (namely, if No), the process from step S109 is repeated until then, until the specified pause time.

If the specified pause time has elapsed (namely, if the answer is "Yes"), m pause. Therefore, the control unit 120 stops the defrosting of the refrigerating chamber 24.

On the other hand, when the cooling chamber 24 is not in need of defrosting (namely if the answer is "No"), at step S111. In step S111 to determine whether the time Cr activate the fan 44 of the refrigerating chamber, calculated during the operation of the rapid cooling, the specified time Crs (namely, the set time of rapid cooling of about 2 hours), stored in the control unit 120.

When the time on Cr fan 44 of the refrigerating chamber is less than the specified time Crs (namely if the answer is "No"), the procedure returns to step S95. Then the procedure is repeated from step S95. When the time on Cr fan 44 of the refrigerating chamber exceeds a specified time Crs (namely, if Yes), the procedure proceeds to step S112 (. In this step, the control unit 120 generates a signal to stop the operation of the rapid cooling of the refrigerating chamber 24 in block 150 of the drive of the compressor and the block 162 of the drive of the fan motor of the refrigerating chamber.

On a signal from the control unit 120 unit 150 to drive the compressor and the block 162 of the drive of the fan motor of the refrigerating chamber is CSO operation rapid defrosting of the refrigerating chamber 24 is completed.

Although the fourth variant embodiment of the present invention has been described in connection with the operation of the rapid cooling of the refrigerating chamber 24, it can similarly be applied to the fast freezing of the freezing chamber 22.

Industrial applicability

As is evident from the above description, the present invention is a defrosting device for a refrigerator and a control method that the defrosting device, in which the cooling chamber is cooled regardless of the internal temperature of the freezing chamber, when the internal temperature of the refrigerating chamber exceeds the set temperature, so that the cooling chamber is maintained at a temperature below a predetermined temperature. In accordance with the present invention, the defrosting operation is carried out in accordance with the intermittent operation of the compressor and fan of the refrigerating chamber, when the internal temperature of the refrigerating chamber exceeds the set temperature, even if the compressor and fan cooling chambers simultaneously. Therefore, it is possible to improve the cooling efficiency. In accordance with the present invention, the time when the operation begins defrosting environment. Therefore, it is possible to achieve the effective conduct of defrost.

If the defrosting operation of the refrigerating chamber is carried out within the time specified in the conditions, requiring defrosting the freezer, thawing freezer is delayed, so that the operation of the defrosting of the freezing and refrigerating chambers can be run simultaneously. On the other hand, if the freezer is in need of defrosting operation, the defrosting of the freezing and refrigerating chambers simultaneously, regardless of the conditions, requiring defrosting the freezer, In this case, increasing the cooling efficiency.

In the case of fast cooling, the time when the operation begins defrosting of the refrigerating chamber, accurately determined by calculating the gradient of the temperature drop on the basis of changes in the internal temperature of the refrigerating chamber. In the case of the fast freezing, the time when the operation begins defrosting freezers, determined by calculating the gradient of the temperature drop on the basis of changes in the internal temperature of the freezer is 1. The device defrosting of the refrigerator containing the refrigerating chamber for storing refrigerated products, freezer to store frozen products formed above the cooling chamber intermediate partition, the compressor is designed to compress the refrigerant to a high temperature and high pressure under the control of the drive device of the compressor, a pair of heat exchange means associated respectively with the freezing and refrigerating chambers and designed to engage the threads of the air pumped into the freezing and refrigerating chambers in heat exchange with the refrigerant and the cooling air flows, a couple of tools ventilation, associated respectively with the freezing and refrigerating chambers and designed to supply streams of cold air, involved in heat exchange with heat exchange means, in the freezing and refrigerating chambers running means of the drive motors of fans, a pair of heating means associated respectively with the freezing and refrigerating chambers and intended for unfreezing the funds of the heat of the freezing and refrigerating chambers under control of the drive means of heaters, temperature measuring, is intended the temperature, designed to set the desired temperatures of the freezing and refrigerating chambers, and to set modes quick freeze and quick cooling, characterized in that it contains means for measuring the temperature of pipelines designed to determine the corresponding temperature in the piping means of heat exchange of the freezing and refrigerating chambers during the respective operations of the heat of the heating devices of the freezing and refrigerating chambers, and management tool designed to identify the point in time when the defrosting operation of each means of heat exchange, on the basis of the on-time of the compressor and the corresponding times incorporating ventilation freezing and refrigerating chambers, and to calculate the gradients of the respective internal temperatures of the freezing and refrigerating chambers, and signal defrosting of the freezing and refrigerating chambers in accordance with gradients and temperatures of piping connected to a pair of heating means and the tool actuator heaters.

2. The device under item 1, characterized in that the heat exchange means of the freezing and refrigerating chambers represents the measures accordingly.

3. The device under item 1, characterized in that the means for venting the freezing and refrigerating chambers is a fan of the freezing chamber and the cooling fan chamber connected to the rotating shafts of the motors fan of the freezing and refrigerating chambers, respectively.

4. The method of controlling the device defrosting of the refrigerator, namely, that specify the temperature of the freezing and refrigerating chambers by using the set temperature of the freezing and refrigerating chambers, include some means of ventilation freezing and refrigerating chambers together with the compressor to change the initial temperatures of the freezing and refrigerating chambers to achieve the specified job step temperatures determine the temperature of the freezing chamber, larger than the internal temperature of the freezing chamber to the desired (set) temperature set by means of the set temperature of the freezing chamber, and support enabled the compressor and the means of ventilation freezers, if the freezer temperature is above the set temperature, determine the temperature of the refrigerating chamber, larger than the inside of Tilney camera, support is included means for ventilation of the refrigerating chamber, when the internal temperature of the refrigerating chamber exceeds the temperature set by means of the set temperature of the refrigerating chamber, and the lower the internal temperature of the refrigerating chamber, turn off the tool ventilation of the refrigerating chamber, when the internal temperature of the refrigerating chamber below the desired temperature set by means of the set temperature of the refrigerating chamber, support is included means for venting the freezer when the internal temperature of the refrigerating chamber below the desired temperature set by means of the set temperature of the refrigerating chamber, shut down the compressor and means for venting the freezer, when the internal temperature of the freezer below the desired temperature set by means of the set temperature of the freezing chamber, and provide measurements of the temperature of the refrigerating chamber, determine whether the internal temperature of the refrigerating chamber, measured at the step of measuring the temperature of the refrigerating chamber set temperature, filled in the management tool, characterized in that the set in the control unit operating time measurement of the camera, the servant of the operation of the refrigerating chamber, if the internal temperature of the refrigerating chamber above a predetermined temperature, determine the operating time of the compressor and means of ventilation of the refrigerating chamber, where it is determined that the preset time has expired, and then calculate the time means of ventilation of the refrigerating chamber, determines whether the counted time means of ventilation of the refrigerating chamber set time stored in the management tool, find out less whether the counted time means of ventilation cooling chamber than the set time stored in the management tool, and then determine whether the total time of compressor operation specified time stored in the control unit, include a means of heating the evaporator of the refrigerating chamber, when the refrigerating chamber exceeds the specified time, whereby defrost the evaporator of the refrigerating chamber, determine the temperature of the piping of the evaporator of the refrigerating chamber when the heat medium heating of the evaporator of the refrigerating chamber, determine whether the temperature of the piping of the evaporator of the refrigerating chamber set temperature of the pipeline, stored in the management tool, stop heating, for which PR is Yes evaporator of the refrigerating chamber set temperature or higher of the pipeline.

5. The method according to p. 4, characterized in that it further clarify the time means of ventilation of the refrigerating chamber, counted by the timer included in the control unit, when the internal temperature of the refrigerating chamber is lower than the set temperature.

6. The method according to p. 4, characterized in that it further continuously count the time means of ventilation of the refrigerating chamber, when the counted time of the refrigerating chamber is less than the set time stored in the control unit.

7. The method of controlling the defrosting device of the refrigerator, namely, that count the times means of ventilation freezing and refrigerating chambers with timers contained in the management tool, and then calculates the operating time of the compressor based on the time means of ventilation freezing and refrigerating chambers, define the conditions that require defrosting the evaporator of the freezing and refrigerating chambers, on the basis of times of operation of the compressor and means of ventilation freezing and refrigerating chambers, conduct defrost to remove frost formed on the evaporator of the freezing and refrigerating chambers, in accordance with the terms of razmara the defrost by measuring the respective temperatures of the piping of the evaporator of the freezing and refrigerating chambers, which change during thawing, and determine, in whole or removed the frost on the evaporator of the freezing and refrigerating chambers, on the basis of the measured temperatures of the piping.

8. The method according to p. 7, characterized in that the determination of the conditions that require defrosting, is that define the conditions requiring defrosting of the evaporator freezer on the basis of the operating time of the compressor and operating time means of ventilation freezer, and identify conditions that require defrosting of the evaporator of the refrigerating chamber, on the basis of the time means of ventilation of the refrigerating chamber, when it is determined that the evaporator freezer requires defrosting.

9. The method according to p. 7, characterized in that the defrosting operation is that at the same time carry out defrosting to remove frost formed on the evaporator of the freezing and refrigerating chambers, when the time working tools ventilation freezing and refrigerating chambers exceeding the set time stored in the management tool for freezing and refrigerating chambers.

10. The method according to p. 7, characterized in that the defrosting operation is closeley and refrigerating chambers, when the time of operation of ventilation freezing and refrigerating chambers is less than the set time stored in the tool control means for ventilation of the freezing and refrigerating chambers.

11. The method of controlling the defrosting operation of the refrigerator, wherein the count time means of ventilation cooling chamber in accordance with the operation mode of the refrigerator, which is changed when running the fan of the refrigerating chamber, define the conditions that require defrosting of the evaporator of the refrigerating chamber according to the counted time means of ventilation of the refrigerating chamber, and count the time means of ventilation freezer when the fan freezer operates in accordance with the internal freezer temperature, determine the conditions requiring defrosting of the evaporator freezer, estimated time means of ventilation the freezer and defrost the evaporator of the freezing and refrigerating chambers for removal of frost, formed in the refrigerating and freezing chambers, given the conditions of defrosting the evaporator of the freezing and refrigerating chambers.

12. The method according to p. 11, otlichayushiesya freezers, either the evaporator of the refrigerating chamber are in a state that requires defrosting.

13. The method of controlling the defrosting operation of the refrigerator, which consists in the fact that the operation is carried out rapid cooling and thus measure the initial temperature of the refrigerating chamber, characterized in that the compressor and means for venting the refrigerating chamber, measure the internal temperature of the refrigerating chamber, which changes at specified time intervals during the counting time means of ventilation of the refrigerating chamber, compute the gradient of the temperature drop corresponding to the change of the internal temperature of the refrigerating chamber, on the basis of the measured internal temperature and the initial temperature, define the start defrosting the evaporator of the refrigerating chamber on the basis of changes in gradient of the temperature drop and carry out the defrosting of the evaporator of the refrigerating chamber on the basis of the commencement of defrost.

14. The method according to p. 13, wherein calculating the change of the gradient of the temperature drop is that determines the absolute value of the difference between the measured internal temperature of the refrigerating chamber and macalindong measurements.

15. The method according to p. 13, characterized in that the determination of the moment of the beginning of the defrosting is that detect the presence of frost on the evaporator of the refrigerating chamber, when the gradient of the temperature drop does not exceed the preset reference gradient, stored in the management tool, which determines the point in time when the defrosting of the evaporator of the refrigerating chamber.

16. The method of controlling the defrosting operation of the refrigerator, which consists in the fact that you are doing the normal cooling by compressor based on the internal temperature of the freezing chamber and control means for ventilation of the refrigerating chamber on the basis of the changing internal temperatures of the freezing and refrigerating chambers, characterized in that measure internal temperatures of the freezing and refrigerating chambers that change during the cooling process to normal operation, measured thus the internal temperature of the freezing and refrigerating chambers and condition of these chambers is defined as abnormal if the elapsed time exceeds the specified stored in the management tool, perform abnormal the measures together with the compressor, when the freezing and refrigerating chambers are abnormal temperature condition, measure the appropriate internal temperature of the freezing and refrigerating chambers that change after incorporating ventilation freezing and refrigerating chambers together with the compressor, determine the moments of the beginning of the defrosting of the freezing and refrigerating chambers on the basis of the times, incorporating ventilation freezing and refrigerating chambers and on-time of the compressor when the internal temperature of the freezing and refrigerating chambers exceeding a prescribed temperature, stored in the management tool, and hold the defrosting of the evaporator of the freezing and refrigerating chambers on the basis of the operations of determining the moments of the beginning of the defrost.

17. The method according to p. 16, characterized in that the compressor and means for venting the cooling chamber for cooling the refrigerating chamber regardless of the internal temperature of the freezing chamber, when the internal temperature of the refrigerating chamber set temperature or higher.

18. The method according to p. 16, characterized in that the operation is abnormal cooling is that detect the presence of frost on the evaporators of morselhoarder, and perform the defrosting of the evaporator of the freezing and refrigerating chambers.

Priority points:

17.11.94 - PP.1 - 3, 7 - 11, 14 and 15;

31.05.95 - PP.4 - 6;

04.01.95 - PP.12 and 13;

22.11.94 - PP.16 - 18.

 

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Defrosting timer // 2246803

FIELD: automation; periodic turn-on of actuating mechanisms of ac automatic-control devices.

SUBSTANCE: proposed defrosting timer has power supply, time counter, heater, end-of-defrosting sensor, compressor, first rectifier, first and second dropping components, and three-contact relay; movable contact of the latter is connected to second pole of power supply; count input of time counter is connected through heater to second fixed contact of relay and through end-of-defrosting sensor, to first pole of power supply. Common lead of time counter is connected to first fixed contact of relay and through compressor, to first pole of power supply. Inputs of first rectifier are inserted between fixed change-over contacts of three-contact relay through first dropping component; output of first rectifier is connected to that of time counter through series-connected threshold element and relay coil. Newly introduced in timer is second rectifier one of whose inputs is connected through second dropping component to second pole of power supply, and its other input is connected to first fixed contact of relay; second rectifier output is connected to time counter output also through series-connected threshold element and relay coil.

EFFECT: reduced power requirement due to lower operational loss and enlarged functional capabilities of timer.

1 cl, 1 dwg

FIELD: refrigerator automatics.

SUBSTANCE: timer has power source, time counter, heater, defrosting pickup, compressor, three-contact relay, two rectifiers, and first and second quenching members. The common lead of the time counter is connected with the movable contact of the three-contact electromagnetic relay. The defrosting pickup is connected between the inlet of the time counter and the second unmovable contact of the relay. The heater is connected between the input of the time counter and the first pole of the power source. The outputs of the second rectifier are connected with the movable contact of the relay and first movable contact of the relay through the second quenching member.

EFFECT: reduced power consumption and enhanced design.

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Refrigerator // 2255273

FIELD: domestic refrigerators.

SUBSTANCE: refrigerator comprises thermally insulated chamber, cooling device with a cooler, additional cooling device with the additional cooler mounted inside the thermally insulated chamber for direct cooling of products, and temperature controller. The additional cooling device is provided with a working unit which comprises reference-input element, actuator, control device, and controlled pressure-tight passages which are used for circulating coolant cooled by ambient air and pass through the wall of the chamber. The passages are the inlet and outlet for the additional coolant and are directly in communication with the ambient air which circulates in the space of the additional cooler and is cut-off by means of the control device and actuator.

EFFECT: enhanced efficiency.

25 cl, 21 dwg

FIELD: refrigeration automatics.

SUBSTANCE: timer comprises power source, time counter, heater, detector of termination of defrosting, compressor, three-contact relay, two single-period rectifiers, and first and second quenching elements. The common output of the time counter is connected with the second pole of the power source. The counting input of the time counter is connected to the second unmovable terminal of the relay through the detector of termination of defrosting and with the first pole of the power source through the heater. The output of the time counter is connected with the unmovable contacts of the relay through three chains defined by the winding and threshold unit, first rectifier and first quenching unit, second rectifier and second quenching unit.

EFFECT: reduced sizes.

1 dwg

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