KR0152808B1 - Refrigerant circulating control apparatus of refrigerator - Google Patents

Abstract

The present invention relates to an apparatus for controlling a refrigerant circulation amount of a refrigerator. In the related art, the accumulator performs a function of preventing a compressor from compressing liquid and adjusting a refrigerant amount required in response to a load. However, when the load is small, the accumulator accumulates in the accumulator. The efficiency of the liquid refrigerant is not properly utilized, as well as a large amount of refrigerant is introduced into the compressor when starting the compressor, there is a problem that the power consumption increases as the initial input is increased. In order to solve this problem, the present invention is to prevent the initial input rise due to the introduction of a large amount of refrigerant by storing the refrigerant in the auxiliary accumulator during the intermittent operation in the refrigeration cycle and then returning to the evaporator when the compressor is started, The present invention can prevent the initial input rise by removing a large amount of liquid refrigerant from the accumulator to the accumulator during initial startup, and also the liquid refrigerant is fed back from the auxiliary accumulator to the evaporator to start the condenser from the condenser to the evaporator. The cooling operation is performed for a predetermined time while the liquid refrigerant is introduced. Accordingly, the present invention can reduce power consumption by maximizing the efficiency of the refrigeration cycle by reducing the initial input at the start of the compressor and eliminating the loss due to the cold air delay.

Description

Refrigerant circulation amount control device of the refrigerator

1 is a block diagram of a conventional refrigeration cycle control device.

2 is a block diagram of a refrigerant circulation amount control device of the present invention.

* Explanation of symbols for main parts of the drawings

201: evaporator 202: accumulator

203: heat exchanger 204: S-pipe

205: compressor 206: condenser

207: dryer 208: pressure reducer

209: check valve 210: auxiliary accumulator

211: solenoid valve 212: microcomputer

The present invention relates to improving the efficiency of the refrigeration cycle of the refrigerator, and in particular, the refrigerant circulation amount of the freezer to increase the efficiency of the refrigeration cycle to increase the efficiency of freezing in the evaporator during operation of the refrigeration cycle in the refrigerator and at the same time to reduce the initial input when the compressor is running. To an adjusting device.

In the conventional refrigeration cycle control apparatus, as shown in FIG. 1, the accumulator 102 for adjusting the amount of refrigerant required for the refrigeration cycle and the pressure of the gas refrigerant supplied from the accumulator 102 are increased. A heat exchanger (103), a compressor (105) for compressing when the pressure rises in the heat exchanger (103) is discharged through the S-pipe (104), and discharged to a high-temperature and high-pressure refrigerant; A condenser 106 for dissipating heat of the refrigerant discharged from the 105 to liquefy the refrigerant, a dryer 107 for drying the refrigerant liquefied by the condenser 106, and drying in the dryer 107. A pressure reducer 108 for reducing the pressure of the refrigerant, and absorbing external heat to cool the low temperature and low pressure refrigerant supplied from the pressure reducer 108, thereby cooling the accumulator 102. It consists of the evaporator 101 which discharges.

Referring to the operation of the conventional device as follows.

The refrigeration cycle of the refrigerator is a gas refrigerant passing through the accumulator 102 is introduced into the compressor 105 through the S-pipe 104 after the pressure is increased in the heat exchange unit 103 to the high-temperature, high-pressure gas refrigerant After it is produced, it is sent to the condenser 106.

The high-temperature, high-pressure gas refrigerant entering the condenser 106 is liquefied through heat exchange with the outside, dried in the dryer 107, and then depressurized in the decompressor 108 so that the low-temperature, low-pressure liquid refrigerant evaporates 101. Flows into.

The low-temperature, low-pressure liquid refrigerant introduced into the evaporator 101 is evaporated by the absorption of external heat to perform a cooling operation while the accumulator 102 and the heat exchanger 103 flow into the compressor 105 sequentially. Done.

The liquid refrigerant that has not evaporated in the evaporator 101 is collected in the accumulator 102 installed in the outlet of the evaporator 101.

The accumulator 102 serves to prevent the occurrence of liquid compression as the liquid refrigerant not evaporated from the evaporator 101 flows into the compressor 105, and also adjusts the amount of refrigerant required in the refrigeration cycle. Done.

That is, the refrigeration cycle of the refrigerator changes the amount of refrigerant required in the intermittent operation (on / off operation) according to the change in the ambient temperature, when a small amount of refrigerant is required, a large amount of refrigerant stored in the accumulator 102 and a large amount of refrigerant When necessary to discharge the refrigerant inside the accumulator 102 serves to adjust to the appropriate amount of refrigerant.

However, although the accumulator performs proper function of preventing the compression of the compressor and adjusting the amount of refrigerant required to cope with the load, when the load is small, the accumulator fails to properly utilize the liquid refrigerant accumulated in the accumulator. Of course, when the compressor starts, a lot of refrigerant is introduced into the compressor, and as the initial input increases, power consumption increases.

The present invention is to improve the efficiency of the refrigeration cycle by preventing the initial input rise due to the introduction of a large amount of refrigerant by storing the refrigerant in the auxiliary accumulator during the intermittent operation and then return to the evaporator when the compressor is started in order to improve the conventional problems It is an object of the present invention to provide an apparatus for controlling a refrigerant circulation amount of a refrigerator to be improved.

The present invention is a refrigerator for forming a refrigeration cycle by circulating a refrigerant through a compressor, a condenser, a dryer, a pressure reducer, an evaporator and an accumulator in order to achieve the above object, the check valve, The auxiliary accumulator and the solenoid valve are configured to be sequentially connected to the inlet of the evaporator.

The present invention having such a configuration prevents the initial input rise by preventing the efficient activity of the liquid refrigerant accumulated in the accumulator and the introduction of a large amount of refrigerant into the compressor when the compressor is started.

Hereinafter, the present invention will be described in detail with reference to the drawings.

2 is a device of the present invention, as shown therein, a refrigerant circulates through a compressor 205, a condenser 206, a dryer 207, a pressure reducer 208, an evaporator 201 and an accumulator 202. In the refrigerator to form a refrigeration cycle, the check valve 209, the auxiliary accumulator 210 and the solenoid valve 211 are sequentially connected to the lower end of the accumulator 202, the evaporator 201. It is configured to be connected to the inlet of.

Referring to the operation and effect of the present invention configured as described above are as follows.

The refrigeration cycle of the refrigerator flows into the compressor 205 through the S-pipe 204 after the pressure of the gas refrigerant passing through the accumulator 202 is increased in the heat exchanger 203 to the high temperature and high pressure gas refrigerant. After it is generated, it is sent to the condenser 206.

The high-temperature, high-pressure gas refrigerant entering the condenser 206 is liquefied through heat exchange with the outside, dried in the dryer 207, and then depressurized in the decompressor 208 so that the low-temperature, low-pressure liquid refrigerant evaporates 201. Flows into.

The low-temperature, low-pressure liquid refrigerant introduced into the evaporator 201 is evaporated by the absorption of external heat to perform a cooling operation while sequentially entering the compressor 205 through the accumulator 202 and the heat exchanger 203. Done.

The liquid refrigerant that has not evaporated in the evaporator 201 is collected in the accumulator 202 installed in the outlet of the evaporator 201.

At this time, the liquid refrigerant accumulated in the existing accumulator 202 in the intermittent operation (on / off) state is introduced into the auxiliary accumulator 210 through the check valve 209 by the weight difference and the pressure (compressor) When the 205 is started, the solenoid valve 211 is opened for a predetermined time (30 seconds) by the control of the microcomputer 212, and the liquid refrigerant stored in the auxiliary accumulator 210 is stored in the evaporator 201. Is fed back.

As a result, since a large amount of refrigerant from the accumulator 202 is prevented from flowing into the compressor 205 when the compressor 205 is started, the initial input increase can be eliminated.

Then, the liquid refrigerant is fed back from the auxiliary accumulator 210 to the inlet of the evaporator 201, and a predetermined time (about 30 seconds) takes for the liquid refrigerant to flow into the evaporator 201 from the condenser 206 after the compressor 205 is started. Cooling is performed during the process, which can eliminate the loss caused by the delay of cold air, thereby improving the efficiency of the refrigeration cycle.

The microcomputer 212 then closes the solenoid valve 211 until the next startup of the compressor 205 such that the liquid refrigerant stored in the accumulator 202 is stored in the auxiliary accumulator 210.

This operation is performed repeatedly during the freezing cycle.

As described in detail above, the present invention can prevent the inflow of a large amount of liquid refrigerant from the accumulator to the compressor during the initial startup to remove the initial input rise, and also the liquid refrigerant is fed back from the auxiliary accumulator to the evaporator to start up. Thereafter, a cooling operation is performed for a predetermined time during which the liquid refrigerant flows from the condenser to the evaporator.

Therefore, the present invention has the effect of reducing the power consumption by maximizing the efficiency of the refrigeration cycle by reducing the initial input at the time of starting the compressor and removing the loss due to the cold air delay.

Claims (1)

In a refrigerator which forms a refrigeration cycle by circulating a refrigerant through a compressor, a condenser, a dryer, a pressure reducer, an evaporator, and an accumulator, self-weight of refrigerant stored in the accumulator and connected to a lower end of the accumulator; A check valve opened and closed by a pressure difference, an auxiliary accumulator in communication with the check valve to store the liquid refrigerant introduced through the check valve, and an inlet side in communication with the auxiliary accumulator and an outlet side inlet of the evaporator And a solenoid valve for opening and closing the liquid refrigerant flowing into the evaporator inlet in the auxiliary accumulator, and a microcomputer for controlling the opening and closing of the solenoid valve.