KR0112068Y1 - Apparatus for controlling cooling materials - Google Patents

Abstract

The present invention relates to a refrigerant amount circulation control device, and more particularly, to a refrigerant amount circulation control device for realizing smooth air conditioning by controlling the amount of circulating refrigerant according to the operating conditions of the indoor unit and the ambient temperature of the outdoor side in a multi-air conditioner.

Therefore, the refrigerant amount control unit comprises a capillary tube for controlling the refrigerant amount connected to the outlet side of the bypass solenoid valve and depressurizing the refrigerant, and an inhibitory valve for preventing refrigerant from passing through the capillary tube into the liquid separator. By distributing and decompressing through the conventional method, there is an effect of preventing the compressor from being damaged due to the lack of refrigerant flowing into the compressor and the freezing caused by the lack of refrigerant at the inlet side of the evaporator which appears when only one evaporator is operated.

Description

Refrigerant amount circulation control device

1 is a conventional refrigerant circulation system diagram

2 is a schematic diagram of a refrigerant amount circulation control device according to the present invention.

* Explanation of symbols for main parts of the drawings

210: evaporator 220: liquid separator

230: compressor 240: condenser

250: capillary tube 260: solenoid valve

270: bypass solenoid valve 280: bypass capillary

290: refrigerant amount control unit

The present invention relates to a refrigerant amount circulation control device, and more particularly, to a refrigerant amount circulation control device that realizes smooth air conditioning by controlling the amount of circulating refrigerant according to the operating conditions of the indoor unit and the ambient temperature of the outdoor side in a multi-air conditioner.

In the conventional refrigerant amount circulation control apparatus, as shown in FIG. 1, the liquid phase contained in the vapor phase refrigerant discharged from the evaporation unit 110 and the vapor phase refrigerant discharged from the evaporation unit 110 by evaporating the liquid refrigerant to a vapor phase refrigerant state. The liquid separator 120 separating the refrigerant of the refrigerant and the compressor 130 to compress the gaseous refrigerant flowing out from the liquid separator 120 to make a high pressure and the high-pressure gaseous refrigerant discharged from the compressor 130 to condense A condenser 140 for converting to a liquid phase, a capillary tube 15 for making the high pressure liquid refrigerant discharged from the condenser 140 into a low pressure state, and a high pressure liquid refrigerant from the condenser 140 to low pressure By-pass unit 170 flowing back into the liquid separator 120 and the low pressure liquid refrigerant from the capillary tube 150 to open and close according to the operating state of the evaporator 110 to evaporate Solenoid valve (1) flowing out to (110) 60).

The operation of the conventional refrigerant amount circulation control device configured as described above is as follows.

When the indoor unit is operated, the solenoid valve 160 operates to introduce the low pressure liquid refrigerant into the evaporator 110 including the first, second, and third evaporators 111, 112, and 113. At this time, the evaporation unit 110 vaporizes the liquid refrigerant while taking away the surrounding heat to discharge the refrigerant in the gas phase. The refrigerant of the gaseous phase discharged from the evaporator 110 is introduced into the liquid separator 120 and separated into the liquid phase and the gaseous refrigerant, and only the gaseous refrigerant is introduced into the compressor 130 and compressed at high pressure. In addition, the high pressure gaseous refrigerant flowing out of the compressor 130 flows into the condenser 140 and is converted into a liquid refrigerant in order to evaporate from the evaporator 110, and then is converted to low pressure through the capillary tube 150. Through the evaporator 110 is introduced again.

On the other hand, the bypass unit 170 'on / off' by the temperature sensor signal for sensing the temperature of the condenser 140 evaporates some of the high-pressure liquid refrigerant discharged from the condenser 140 on the indoor unit side Directly flows out to the liquid separator 120 of the outdoor unit without passing through the unit 110 to adjust the amount of refrigerant flowing into the capillary tube 150 according to the load variation of the evaporator 110.

At this time, the capillary 150 is capable of smoothly controlling the amount of refrigerant under all normal operating conditions of the evaporator 110.

However, if only the first evaporator 111 of the evaporator 110 is operated, the liquid refrigerant discharged from the condenser 140 is transferred to the first evaporator 111 through the first capillary tube 151 and the first solenoid valve 161. In this case, the amount of refrigerant flowing into the first capillary tube 151 is introduced into the first evaporation unit 111 without being completely depressurized because many refrigerants corresponding to the entire product pass therethrough, and the refrigerant is completely vaporized. If not, the liquid separator 120 and the compressor 130 are sucked into the condenser 140. At this time, since the amount of refrigerant decompressed in the first capillary tube 151 is small, the amount of refrigerant is smaller than the amount of refrigerant required for the compression of the compressor 130 itself by introducing the compressor 130 through the first evaporator 111. The temperature of the gaseous refrigerant discharged from the) rises, and the high temperature and high pressure refrigerant is completely condensed through the condenser 140, but is converted into a liquid refrigerant of low temperature and low pressure, so that all of the refrigerant cannot escape through the first capillary tube 151. It accumulates at the outlet side of the condenser 140. Due to this, there is a problem in that the amount of refrigerant sucked into the first evaporator 111 due to the flow of the refrigerant is insufficient, so that a freezing phenomenon occurs due to the lack of refrigerant on the inlet side of the first evaporator 111, and also the compressor 130 Since the amount of refrigerant flowing into the air is also small, the temperature of the refrigerant discharged after being compressed increases, so there is a problem in that the compressor 130 is not burned out and thus the air conditioner cannot be made comfortable.

Therefore, the present invention is intended to continuously achieve a smooth refrigerant circulation by adding a refrigerant amount control unit, the present invention having this purpose will be described in detail with reference to the accompanying drawings.

FIG. 2 is a schematic diagram of a refrigerant amount circulation control device according to the present invention, which is included in an evaporator 210 and a gaseous refrigerant discharged from the evaporator 210 to evaporate a liquid refrigerant to form a gaseous refrigerant. The liquid separator 220 for separating the refrigerant of the liquid phase, and the compressor 230 for compressing the refrigerant of the gaseous phase flowing out of the liquid separator 220 to a high pressure and the high-pressure gaseous refrigerant discharged from the compressor 230 Condenser 240 for condensing and converting the liquid into a liquid phase, and the capillary tube 250 and one evaporator of the evaporator 210 which operate the high pressure liquid refrigerant discharged from the condenser 240 to a low pressure state are operated or sealed. Bypass solenoid valve 270 that is 'on' by the external temperature sensor, and when the bypass solenoid valve 270 is 'on' by converting the high-pressure liquid refrigerant from the condenser 240 to low pressure With liquid separator 220 The inflow timing is a bypass capillary tube 280, a refrigerant amount controller 290 connected to the bypass solenoid valve 270 to control the amount of refrigerant flowing into the capillary tube 250, and a low pressure liquid phase from the capillary tube 250. The refrigerant is composed of an solenoid valve 260 that opens and closes according to the operating state of the evaporator 210 and flows out to the evaporator 210.

On the other hand, the refrigerant amount control unit 290 is connected to the outlet side of the bypass solenoid valve 270, the refrigerant amount control capillary tube 291 and the refrigerant passing through the refrigerant amount control capillary tube 291 is the solenoid valve ( It consists of a check valve 292 to be discharged only to the inlet side of the 260, it will be described in detail the operation and effect of the present invention configured as described above.

When two or three of the evaporators 210, 212, 213 of the evaporator 210 are in operation, the bypass and the solenoid valve 270 are 'off', so that the high-temperature, high-pressure gas phase refrigerant discharged from the compressor 230 is the condenser 240. ) Is converted into a liquid phase and then introduced into the evaporator 210 through the capillary tube 25 and the solenoid valve 260, and is converted into the refrigerant in the gas phase in the evaporator 210 and then the compressor through the liquid separator 220. Reflowing into 230 results in a continuous circulation of the refrigerant.

In addition, an example in which only one of the evaporators of the evaporator 210 is operated will be described below.

If only one first evaporator 211 of the evaporator 210 is operated, the high-pressure liquid refrigerant discharged from the condenser 240 by the bypass solenoid valve 270 is 'on', the liquid separator 220 and the amount of the refrigerant. Flow into the control unit 290. At this time, the high-pressure liquid refrigerant in the refrigerant amount control capillary 291 of the refrigerant amount control unit 290 is depressurized and then discharged through the inhibiting valve 292. The low pressure liquid refrigerant flows into the valve 261. As a result, the high-pressure liquid refrigerant discharged from the condenser 240 into the first capillary tube 251 is not excessively introduced, and a part of the high-pressure liquid refrigerant is dispersed and decompressed through the refrigerant amount control unit 290 so that the first evaporator of the evaporator 210 ( 211), smooth freezing circulation is achieved.

As described in detail above, the present invention distributes and reduces the excess refrigerant flowing into the capillary through the refrigerant amount control unit to freeze and compressor due to the lack of refrigerant at the inlet side of the evaporator that appears when only one evaporator is operated. There is an effect of preventing the compressor burnout, etc. due to lack of the amount of refrigerant introduced.

Claims (2)

When only one evaporator is operated or 'on' by the outdoor temperature detection signal, the bypass solenoid valve discharges the refrigerant flowing into the capillary after being discharged from the condenser and the liquid refrigerant discharged from the bypass solenoid valve is decompressed. And a bypass capillary tube which is discharged to the liquid separator, and a refrigerant amount control unit which reduces the refrigerant discharged from the bypass solenoid valve and discharges the discharge refrigerant of the capillary tube to the inlet side of the solenoid valve receiving the inflow. controller. The refrigerant amount control unit of claim 1, wherein the refrigerant amount control unit is connected to an outlet side of the bypass solenoid valve and disperses and reduces the refrigerant discharged from the bypass solenoid valve. A refrigerant amount circulation control device comprising a check valve for discharging only to the inlet side.