Refrigeration installation

 

(57) Abstract:

Usage: in the processing and storage of products, providing the functions of the refrigerator and function of the fermentation of food. The inventive refrigeration system includes a first branch is always used for storage, and the second part, used either as fermentation or for food storage. The first and second heat exchangers are located in the first and second branches, respectively. The unit has first and second capillary tube, where the flow resistance of the first capillary tube is less than the flow resistance of the second capillary tube, and they are connected respectively to the input of the first and second heat exchangers and fan out from the solenoid valve. The output of the first heat exchanger connected to the compressor through the refrigerant tube, and the outlet of the second heat exchanger is connected to the junction of the first heat exchanger and the first capillary tube. The second part is placed a heater for heating the inner cavity of the second compartment and the motor-fan for uniform heat dissipation from the heater according to the second compartment. When the second compartment is used for fermentation, the refrigerant flows as at first the temperature, and the second part at a relatively higher temperature. When the second part is used for storage, the refrigerant flows only through the first capillary tube. 2 C.p. f-crystals, 6 ill.

The invention relates to refrigeration systems, namely, the refrigerating-chamber type.

Such refrigeration systems are well known. Known in particular refrigerating unit, containing the first and second refrigerating compartment defined in each heat exchanger, a compressor for converting the refrigerant in a gaseous state, a condenser for converting the refrigerant coming from the compressor into a liquid state, installed after the condenser precapillary tube, solenoid valve, as well as posted on the first and second pipelines before the respective heat exchangers of the first and second capillary tubes for low pressure liquid refrigerant coming from the condenser (AV. St. USSR N 1,388,676, CL F 25 D 11/02, publ. 15.04.1988).

In the above conventional refrigeration system, one compartment is a freezer with an average temperature above zero, and the other compartment is a freezer that supports temperance, the heat exchangers and the capillary tube form a closed circuit to move the refrigerant in the cycle of its operation. The refrigeration system is typically controlled by a special management tool, which may include a microprocessor. For proper distribution of chilled air through the chambers of the refrigerator, in the partition between the freezing and refrigerating chambers can be placed controlled damper.

The normal operating cycle of the refrigerant provides for the preparation of gaseous refrigerant in the compressor where the refrigerant is compressed under high pressure. Then the refrigerant enters the condenser and condenses it into a liquid. Thereafter, the liquid refrigerant flows through the capillary tube in the heat exchangers, in which, going again into the gaseous state, is doing work, taking heat from the refrigeration chambers. The temperature in the refrigerating chambers, respectively, decreases. The microprocessor evaluates the information received from the temperature sensors of the freezing and refrigerating chambers, and controls opening/closing of the damper, so by keeping the temperature in the cells at desired levels.

The above-described conventional Kholodilin the range. For some products, however, it is desirable to provide additional storage modes, allowing fermentation during storage. These products include 8 particular Korean national product "kimchi", representing a specially seasoned and fermented vegetables radishes, cabbage or cucumbers, pepper, garlic, onions, ginger, etc.

This problem is solved according to the invention by the fact that one of the branches, hereinafter called the "second" has a heater to raise the temperature in the second compartment and to allow fermentation of food, and the exit of the heat exchanger of the second branch connected to the first pipeline in the area between the first heat exchanger and the first capillary tube and the solenoid valve is located so that the first and second capillary tubes connected to him, and communicated with means to control its operation so to ensure the flow of refrigerant through the first and second pipes and heat exchangers to maintain the respective cavities of the first and second compartments at the desired storage temperature and fermentation, when the product of the continuation in the first and second parts of the desired storage temperature, the flow of the refrigerant sequentially through the second capillary tube, the second heat exchanger and the first heat exchanger.

Preferably, the refrigeration installation according to the invention contains a motor-fan for uniform dispersion of heat delivered by the heater according to the volume of the second compartment.

Preferably also such an implementation, the first and second capillary tubes, so that the flow resistance of the first capillary tube was less than the flow resistance of the second capillary tube.

The first part of the refrigeration installation according to the invention, therefore, always serves as a chamber for storing food, while the second part can be used in storage mode or in the mode of fermentation, with the possibility of switching from one to the other.

Compressor, heater, motor fan and solenoid valve may have respective drive means, and the means of measuring the internal temperature (sensors), the degree and speed of fermentation can be connected to the microprocessor through the respective signal converters.

In Fig. 1 presents a perspective view of the refrigeration installation according to the invention, is removed from the door; Fig. 2 veruki according to the invention; in Fig. 4 the duty cycle of the refrigeration installation according to the invention; and Fig. 5 block diagram of the algorithm and the microprocessor of Fig. 3; Fig. 6 block diagram of the algorithm of the microprocessor of Fig. 3.

In Fig. 1 2 shows the refrigeration installation according to the invention, containing the first part 1, which is always used for food storage, and the second part 2, which can be used both for storage and fermentation products such as kimchi.

Rear inner walls of the first and second branches is the pipe 3, through which the refrigerant flows. The pipe 3 is included in the circuit, including the capacitor 4, a compressor 5, the heat exchangers 6 and 7, precapillary tube 8, the solenoid valve 9 and two capillary tubes of the first 10 and second 11.

The compressor 5 translates the refrigerant gas in the state in which he has a high pressure and, as a result of the compression, high temperature. Typically, the compressor 5 is placed in the lower part of the unit, and in this case it is located in the lower part of the second branch 2.

The condenser 4, which should give heat to the surrounding environment, in order to lower the temperature of the refrigerant coming from the compressor, is traditionally placed on or in the panel x the agent is reduced and the refrigerant becomes liquid under conditions of high pressure and relatively low temperature.

Precapillary tube 8 is connected by its input to the output of the compressor 5. In precapillary tube 8, the refrigerant is in a liquid state with a low pressure and low temperature. Solenoid valve 9 is connected to the output precapillary tube 8. The first and second heat exchangers 6 and 7, which evaporates the refrigerant placed appropriately in the branches 1 and 2. The first and second capillary tubes 10 and 11, which decreases the pressure of the refrigerant after its preliminary reduction in precapillary tube 8, branch off from the solenoid valve 9 and is connected to the inputs of the first and second heat exchangers 6 and 7, respectively. The first capillary tube 10 is made so that it had a smaller flow resistance than the second capillary tube 11. Consequently, through the capillary tube 10 will be more refrigerant than through the capillary tube 11.

The output of the second heat exchanger 7 is connected by a duct with the inlet of the first heat exchanger 6, and the output of the first heat exchanger 6 is connected by a duct to the compressor 5.

In the further path of the refrigerant from the solenoid valve 9 through the first capillary mujeres second capillary tube 11, the second heat exchanger 7 and the duct connected to the first capillary tube 10 and the first heat exchanger, will be called the second circuit.

The heater 12 to raise the temperature in the second compartment 2 to a level suitable for the fermentation of food, is located at an appropriate place in the second division. Near the heater 12 is the fan 13, designed for uniform heat distribution in the second part 2.

The compressor 5 has a drainage element 14 to collect and remove moisture generated during defrosting.

In Fig. 3 and presents an electrical block diagram of the installation according to the invention.

It is evident from Fig. 3 it can be seen that the installation according to the invention contains the node selection function (switch) 15 for a user to select either of the functions of the fermentation or storage functions (in both branches), the microprocessor 16 for controlling the whole operation of the refrigeration system according to user-selected function, the node 17 control (i.e. on-off) of the compressor 5 driven and action when you want to resume the circulation of the refrigerant, the node 18 control the solenoid valve 9 controlling the choice of the path of flow of the refrigerant uselocal 20 controls the fan 13 for uniform heat distribution from the heater 12 in the second part 2. All of these control units operate under the control of the microprocessor 16.

There are several measuring units to find the number of terms in the second part 2 associated with the microprocessor 16 via the respective blocks conversion of analog sensor signals into digital signals received by the microprocessor. That is, there is a temperature sensor 21 for measuring the temperature in the second compartment and the Converter it signals 22, a sensor 23 to the degree of fermentation and the Converter 24 of the signals of the sensor 23, the sensor 25 of the rate of fermentation and the Converter 26 and the signals from the sensor 25.

The sensors 23 and 25 can be made in the form of sensor for fermentation of kimchi, disclosed in U.S. patent N 5,142,969. The sensor 23 to the degree of fermentation can also be an ordinary sensor pH.

The installation according to the invention operates as follows with reference to Fig. 5 and 6, which presents a flowchart of the algorithms of the functions of the microprocessor according to the circuit diagram shown in Fig. 3.

When the refrigerator is turned on (block diagram in Fig. 5), the user selects (stage 100) between fermentation and storage switch 15, and the microprocessor begins upravova as the second part 2 can be used as a mode of fermentation, and in the storage mode. If the user has selected the function of fermentation, is carried out stage 130, on which the microprocessor 16 sends signals to each of the nodes 17 and 20 to enable, respectively, of the compressor 5, the solenoid valve 9, the heater 12 and the fan 13. Before the end of the fermentation process solenoid valve is on, that is, the coil will be energized.

When a voltage is applied to the coil of the solenoid valve 9, it opens path for the refrigerant pipeline between the first and second capillary tubes 10 and 11, and the refrigerant coming from precapillary tube 8, occurs both in the first and second capillary tubes 10 and 11.

Since the flow resistance in the first capillary tube 10 is less than the second capillary tube 11, the tube 10 flows more refrigerant than the tube 11. Therefore, in the first heat exchanger 6 flows more refrigerant than in the second heat exchanger 7, and thus the first heat exchanger maintains a lower temperature in the first compartment 1, for example, about zero. The temperature within the first compartment 1 is supported by periodic switching of the compressor 5.

The temperature in the second separate heat exchanger 7 will evaporate less refrigerant. Because of this, the temperature in the second compartment is easier to raise the temperature of fermentation, which may be in the range of, for example, between the 20oC and 30oC.

The temperature inside the second compartment 2 in the mode of fermentation is controlled by periodic turning on the heater 12 regardless of the operation of the compressor 5. When turning on the heater 12 is also included, and the motor-fan 13 to the heating of the second half was more even.

The temperature inside the second compartment 2 is controlled by the microprocessor 16 by a sensor 21, the temperature and the signal Converter 22. At stage 150, the microprocessor compares the temperature inside the second compartment 2 with the preset temperature in the memory of the microprocessor, and when the temperature in the second compartment 2 falls below a preset value, the microprocessor 16 includes a heater 12 and the motor-fan 13 on stage 160.

If the temperature inside the second branch 2 (stage 150) is equal to the specified value, the process goes to the step 170 (Fig. 6). At this stage, the microprocessor compares the current speed of fermentation with a given rate of fermentation. Determination of the rate of fermentation is carried out using the Tadei 170, the microprocessor sends a signal to the nodes 19 and 20 to enable, respectively, of the heater 12 and the motor-fan 13.

Repeat stages 170 and 180 current rate of fermentation is brought to the specified value, and the process goes to the step 190. Therein, the microprocessor compares the current degree of fermentation (acidity) with a given degree of fermentation.

The degree of fermentation is determined by the sensor 23 and the signal from the sensor 23 is transmitted through the transducer 24 to the microprocessor 16. If the current degree of fermentation below a preset value, the above-described processes maintain the temperature and speed of fermentation by periodic switching on of the heater 12 and the motor-fan 13 continue up until the current degree of fermentation reaches a preset value. This fermentation is stopped, and the second part 2 automatically switches to storage mode (stage 210).

At the end of the fermentation process, the microprocessor 16 outputs a signal to the solenoid valve 9 through node 18 of the control valve 9. The valve 9 closes the connection of the refrigerant piping with the first capillary tube 10, and the passage into the second capillary tube 11 opens. Accordingly, the refrigerant will pass through precapillary tube 6 and the second capillary tube 11, and the whole circuit prohozdenie 11, the second heat exchanger 7 and the first heat exchanger 6, where the refrigerant will flow into the compressor 5. In this cycle the temperature in both compartments 1 and 2 will be maintained at the same level, that is, the second part 2 will be used in the cooling mode storage (stage 220).

When the second branch 2 in the storage mode, the heater 12 and the motor-fan 13 are not included, and the temperature in the compartments 1 and 2 is regulated only by the periodic activation of the compressor 5.

The storage mode can be activated directly by the user, without the prior work of the second part 2 in the mode of fermentation. When the coil of the solenoid valve 9 is not operated, and the installation will proceed directly to the refrigeration cycle shown in Fig. 6.

1. Refrigerating unit, containing the first and second refrigerating compartment defined in each heat exchanger, a compressor for converting the refrigerant in a gaseous state, a condenser for converting the refrigerant coming from the compressor into a liquid state, installed after the condenser precapillary tube, solenoid valve, as well as posted on the first and second pipelines before the enta, coming from the condenser, wherein the plant is equipped with a heater installed in the second compartment to increase its temperature and to allow fermentation of food, and the exit of the heat exchanger of the second branch wired to the first pipeline in the area between the first heat exchanger and the first capillary tube and the solenoid valve is located so that the first and second capillary tubes connected to him, and communicated with means to control its operation so that to ensure the flow of refrigerant through the first and second pipes and heat exchangers to maintain the respective cavities of the first and second outlets at the desired storage temperature and fermentation, when the product should ferentiates in the second part, and to ensure that after completion of the fermentation, and in the maintenance mode in the first and second parts of the desired storage temperature, the flow of the refrigerant sequentially through the second capillary tube, the second heat exchanger and the first heat exchanger.

2. Installation under item 1, characterized in that it contains the motor-fan for uniform dispersion of heat delivered by the heater according to the volume of the second OK, the flow resistance of the first capillary tube is less than the flow resistance of the second capillary tube.

 

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