REFRIGERANT AUTOMATIC DRAIN AND FILLING DEVICE AND ITS METHOD OF CAR COOLING DEVICE

摘要

A cooling device for a vehicle, comprising: a storage tank mounted between a compressor and an expansion valve and connected to a separate hose to charge a refrigerant discharged from the cooling device or to supply the refrigerant to the cooling device; First pressure sensing means mounted in a passage between the compressor and the condenser to sense a pressure of the flowing gas; Second pressure sensing means for sensing the pressure of the refrigerant flowing in the passage between the compressor and the expansion valve; Temperature sensing means for sensing a temperature of the refrigerant flowing in the passage between the compressor and the expansion valve; When the first pressure of the gas between the compressor and the condenser is higher than the first set pressure, the refrigerant discharge signal is output, and the second pressure of the refrigerant between the compressor and the expansion valve is lower than the second set pressure, and the compressor and the expansion Operation control means for outputting a refrigerant charge signal when the refrigerant temperature between the valves is higher than the set temperature; A drain valve driven according to an applied refrigerant discharge signal to discharge the refrigerant output from the compressor to the storage tank, and a refrigerant driven in accordance with the applied refrigerant charge signal to be charged in the storage tank between the compressor and the expansion valve. Refrigerant discharge and filling device of the vehicle cooling device comprising a charge valve for supplying the refrigerant passage, when the gas output from the compressor is more than a predetermined pressure discharges the refrigerant to the warehouse to lower the pressure, the refrigerant supplied to the compressor When the temperature is below a certain temperature or below a certain pressure, by replenishing the refrigerant stored in the warehouse, a smooth cooling action of the vehicle is achieved.