Patent ID: 6606873
Filing Date: 2003-08-19
Classification: B60H,F25B

Abstract:
An ejector circuit comprising:a compressor for drawing and compressing refrigerant; a radiator for cooling refrigerant discharged from the compressor; an evaporator for evaporating refrigerant; an ejector, which includes a nozzle for expanding refrigerant under reduced pressure by converting pressure energy of high-pressure refrigerant flowing out of the radiator into velocity energy, and a suction device for drawing gas-phase refrigerant, which has evaporated in the evaporator, by a high speed flow of refrigerant ejected from the nozzle and for increasing the pressure of the refrigerant by converting velocity energy into pressure energy by mixing refrigerant ejected from the nozzle with refrigerant drawn from the evaporator; a gas-liquid separator for separating refrigerant into gas-phase and liquid-phase states, storing separated refrigerant, and supplying gas-phase refrigerant to the suction side of the compressor, and supplying liquid-phase refrigerant to the evaporator; and a hot-gas passage for guiding refrigerant discharged from the compressor to the evaporator, wherein the hot-gas passage bypasses the ejector; and inflow-preventing means for preventing the refrigerant from flowing into the hot-gas passage during a normal operation, in which the refrigerant is evaporated in the evaporator.