Cooling device

FIELD: heating.

SUBSTANCE: present invention pertains to a cooling device. The cooling device has cooling circuit (9) comprising: i) compressor (2), executing the cooling cycle; ii) evaporator (3), absorbing heat energy of the medium being cooled; iii) condenser (4), transmitting heat energy to an external medium; iv) capillary pipe (5), allowing for expansion of the cooling agent coming out of condenser (4), and carrying the cooling agent to evaporator (3); v) valve (6) with electromagnetic control, controlling flow of the cooling agent and located between condenser (4) and capillary pipe (5); vi) bypass line (7), leveling pressure in the sucking and blowing parts of the compressor (2). The cooling circuit (9) also has: i) valve (16) electromagnetically controlled, which prevent reverse flow to evaporator (3) when compressor (2) is not working and which is in the sucking part of the compressor (2); ii) control mechanism (8), which delays opening of electromagnetically controlled valve (16) by a period, which runs from starting the compressor (2) until a limit value of torque is attained.

EFFECT: prevention of migration of cooling agent when the compressor is not working and easier start up of the compressor.

3 cl, 3 dwg

 

The present invention relates to a cooling device, where the device includes circuit cooling, which prevents migration of the cooling agent.

In cooling devices such as refrigerators and air conditioners, when the compressor is not running, the refrigerant, which is under high pressure inside the capacitor is moved to the evaporator, which is under lower pressure; refrigerant that reaches the evaporator and has a higher temperature creates an additional burden upon cooling. This process, leading to loss of useful work, called the migration of refrigerant. For this reason, the cooling systems at the stopped compressor path of the cooling agent, which moves to the evaporator from the condenser block and thus prevent the migration of refrigerant, however, if not taken other precautions, as long as the pressure between the condenser and the evaporator will not be aligned due to the high differential pressure between the suction and discharge parts of the compressor raises the issue of starting the compressor at the beginning of the working period, i.e. after stage compressor stop. When solving the start-up of the compressor, even if during the start of the achievements which indicate the balance of environment, under pressure, through the use of, for example, bypass roads provided between the suction and discharge parts of the compressor can be created intense flow, while during the initial seconds of the working period is not reached the limit value of torque of the compressor.

In U.S. patent US 5088303 and US 3722228, as well as in the European patent EP 0060315 proposed mechanical preventing migration of the cooling agent through the use of valves.

In U.S. patent US 4735054 and US 4790142 proposed to prevent migration of refrigerant through the use of a blocking valve with automatic control in a heat pump operating in two directions, at the beginning of the working period to give effect to the reverse flow valve, balance the pressure between the suction and discharge parts and thereby facilitate starting of the compressor.

In U.S. patent US 5309728 proposed to prevent migration of refrigerant in the air conditioner, which includes a large number of evaporators, within a short period after stopping the equipment in the internal circuit, and the stopped state of the compressor continue or the compressor operates in the reverse mode, and the pressure balance through the bypass line magdalenian capacitor and release.

According to the European patent application EP 0692687 use valve with solenoid control at the entrance of the capillary tube and thus prevent the migration of refrigerant, using a control mechanism, which sets the time between the operation of the valve with solenoid control and compressor.

The purpose of this invention is to provide a cooling device and method of its operation, to prevent the migration of refrigerant that occurs when the stopped state of the compressor, as well as to improve the starting of the compressor in the initial period of operation, which occurs immediately after period stopped state.

The specified technical task is solved in the proposed cooling device containing the cold chain, including: i) a compressor that performs the cooling cycle; (ii) the evaporator, absorbing heat energy from the environment to be cooled; (iii) capacitor, transferring thermal energy into the environment; (iv) capillary tube, providing increased cooling agent, which leaves the condenser, and transferring the refrigerant to the evaporator; v) valve with solenoid control, managing the flow of refrigerant and located between the condenser and the capillary tube; (vi) the bypass line, annoveriamo pressure in the suction and the discharge parts of the compressor, thus according to the invention the cold chain contains: i) a valve with solenoid control, which prevents the reverse flow to the evaporator when the compressor and which is located in the suction side of the compressor; (ii) a control mechanism that delays the opening of the valve with solenoid control period, which runs from the start of the compressor until then, until it reaches the limit value of the torque.

Preferably, the cold chain also contains: (i) a bypass line, which is located between the valve with solenoid control and the suction part of the compressor and which allows flow of refrigerant to the suction side of the compressor, thus setting the equilibrium pressure in the suction and discharge parts of the compressor.

The cold chain may contain: (i) a bypass line, which balances the pressure when valve with solenoid control is blocked to prevent the migration of refrigerant, and which is installed between the suction and discharge parts of the compressor; (ii) a valve with solenoid control, which is installed on the bypass line.

The cooling unit with the method of control designed to achieve specified you the e purpose according to the invention, presented in the attached drawings, on which:

figure 1 presents a view of the cooling device in the future;

figure 2 presents a schematic view of a circuit cooling;

figure 3 presents a schematic view of a circuit of cooling an alternative application of the invention.

The items shown on the drawings numbered separately as follows:

1 - cooling unit;

2 - compressor;

3 - evaporator;

4 - condenser;

5 - capillary tube;

6, 16, 116 - valve with solenoid control;

7, 17 - a by-pass line;

8 is a mechanism of control;

9 - the cold chain.

The cold chain (9), which provides the refrigeration cycle and which is used for the cooling device (1), for example, refrigerators and air conditioners, includes a compressor (2), an evaporator (3), which takes heat energy to the environment being cooled condenser (4), which transfers thermal energy to the external environment, the capillary tube (5), which provides the expansion of the refrigerant that leaves the condenser (4), and transfers the refrigerant to the evaporator (3), preferably two-way valve (6) with electromagnetic running, which prevents migration of the cooling agent by blocking the flow when stopped condition the compressor (2) and which is located between the condenser (4) and the capillary tube (5), the valve (16) with electromagnetic control, which prevents the reverse flow to the evaporator (3) in the stopped compressor (2) and which is located in the suction side of the compressor (2), bypass line (7), which is located between the valve (6) with electromagnetic control and the suction part of the compressor (2) and which provides the possibility of leakage of the cooling agent blocked by the stopped compressor (2)to the suction side of the compressor (2), while balancing the pressure in the suction and discharge parts of the compressor (2), the control device (8), which controls the operation of valves (6, 16) with electromagnetic control and compressor (2) (2).

Valve (6) with electromagnetic control allows you to maintain the cooling cycle by flow direction to the capillary tube during the working period and deflects the flow to the bypass line (7), blocking the flow that goes to the capillary tube (5) when the stopped compressor (2).

When the method of controlling a cooling device (1), which is the subject of the invention, in the case of the stopped compressor (2) migration of refrigerant coming from the condenser (4) to the evaporator (3), prevent by closing the exit of the capillary tube (5) valve (6) with solenoid control is. At the same time, the output of the bypass line (7) of the valve (6) with solenoid control open and through the reject flow to the suction side of the compressor (2) the pressure between the suction and discharge parts of the compressor (2) is brought into balance. The valve (16) with electromagnetic control, which is located on the suction side of the compressor (2), cover and prevent reverse flow to the evaporator (3). When the compressor (2) is in operation, to maintain the cooling cycle exit capillary tube valve (6) with solenoid control open, and the output of the bypass line (7) block. If the valve (16) with solenoid control is opened synchronously with the period of operation of the compressor (2), the pressure in the suction side of the compressor (2) partially reduced until, until it reaches the limit value of the torque, which must be received by the compression feature after the initial start, and during the stopped state, even if the pressure balance, is the difference in pressure between the two parts of the compressor (2); this pressure difference creates a strong flow during the initial start of the compressor (2). In the case of applications that constitute the subject of the invention, when the switching of the compressor (2) from the stopped state to the working period, otkriven the e valve (16) with electromagnetic control delay for the period which represents the period between the beginning of the start of the compressor (2) and the limit torque value. Therefore, balanced pressure values stored in the stopped compressor (2), will be supported, when the limit is reached the torque and the moment in time when execution starts pumping ability of the compressor (2), via the bypass line (7), with high flow rate provided by the thrust of the compressor (2) during execution of the start, will be prevented.

In yet another embodiment, the use according to the invention the cold chain (9) includes a valve (6) with electromagnetic control, which prevents migration of the cooling agent by blocking the flow stopped when the compressor (2) and which is located between the condenser (4) and the capillary tube (5), the valve (16) with electromagnetic control, which prevents the reverse flow to the evaporator (3) in the stopped compressor (2) and which is installed on the suction side of the compressor (2), bypass line (17), which balances the pressure, when the valve (6) with solenoid control is blocked to prevent the migration of refrigerant, and which is installed between the suction and discharge parts of the compressor (2), valve (116) electron gnanam management, which is installed on the bypass line (17), and the control device (8)which controls the operation of valves (6, 16, 116) with electromagnetic control and compressor (2) (3).

When a specific application of the invention in the case of the stopped compressor (2)as soon as the valve (6) with electromagnetic control, which is located between the condenser (4) and the capillary tube (5), blocked, valve (116) with electromagnetic control, located on the bypass line (17), opens and allows flow in the direction opposite to the direction of discharge, and thus the pressure will be balanced. The valve (16) with electromagnetic control, located on the suction side of the compressor (2), when closing prevents the reverse flow to the evaporator (3). When the compressor (2) is switched to the working mode to maintain the cooling cycle, the valve (6) with electromagnetic control, which is located between the capillary tube (5) and the condenser (4), is opened and the valve (116) with electromagnetic control, which is located on the bypass line (17)is closed. Opening of the valve (16) with electromagnetic control can be delayed by means of the control device (8) for the period that elapses from the start of the compressor (2) until such time as will not be achieved within the other the amount of torque. Therefore, balanced pressures are changed in reverse when stopped the compressor (2), will be saved through the bypass line (17) until then, until it reaches the limit torque value, and the compressor (2) will not perform its pumping function, this will be prevented pull the compressor (2) with high flow rates.

In the case of the cooling device (1) and method of management, which are the subject of the invention, migration of the cooling agent, which occurs when the stopped compressor (2) from the condenser (4) to the evaporator (3) and which leads to loss of useful work, will be prevented; provided, that the migration of refrigerant is prevented, the pressure between the suction and discharge parts of the compressor (2) is aligned, this will provide an easier start of the compressor (2), and in the course of execution of the start, until it reaches the limit torque value, will be prevented pull the compressor (2) with high flow rates.

1. The cooling device (1)containing the cold chain (9), which includes: (i) compressor (2)performing a refrigeration cycle; (ii) the evaporator (3), absorbing heat energy from the environment to be cooled; (iii) a condenser (4), which transfers thermal energy to the external cf the remote control; iv) capillary tube (5), providing increased cooling agent, which leaves the condenser (4), and transferring the refrigerant to the evaporator (3); (v) the valve (6) with electromagnetic control, managing the flow of refrigerant and located between the condenser (4) and capillary (5); (vi) the bypass line (7, 17), balancing the pressure in the suction and discharge parts of the compressor (2), characterized in that the cold chain (9) includes: (i) the valve (16) with solenoid control that prevents the reverse flow to the evaporator (3) when the compressor (2) and which is located in the suction side of the compressor (2); (ii) the control device (8), which delays the opening of the valve (16) with electromagnetic control period, which runs from the start of the compressor (2) until then, until it reaches the limit value of the torque.

2. The cooling device (1) according to claim 1, characterized in that the cold chain (9) includes: (i) bypass line (7), which is located between the valve (6) with electromagnetic control and the suction part of the compressor (2) and which provides the possibility of leakage of refrigerant to the suction side of the compressor (2), thus setting the equilibrium pressure in the suction and discharge parts of the compressor (2).

3. The cooling device (1) according to claim 1, characterized in that the cold chain (9) includes: (i) bypass line (17), which balances the pressure, when the valve (6) with solenoid control is blocked to prevent the migration of refrigerant, and which is installed between the suction and discharge parts of the compressor (2); (ii) the valve (116) with electromagnetic control, which is installed on the bypass line (17).



 

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