Patent ID: 6574987
Filing Date: 2003-06-10
Classification: B60H,F25B

Abstract:
An ejector cycle system comprising:a compressor for sucking and compressing refrigerant; a radiator which cools refrigerant discharged from the compressor; an evaporator in which refrigerant is evaporated by absorbing heat; an ejector which decompresses and expands refrigerant from the radiator to suck gas refrigerant evaporated in the evaporator, and converts an expansion energy to a pressure energy to increase a refrigerant pressure to be sucked into the compressor; a gas-liquid separator for storing refrigerant therein, in which refrigerant from the ejector is separated into gas refrigerant and liquid refrigerant; a pipe member disposed in the gas-liquid separator, through which gas refrigerant in the gas-liquid separator is introduced into the compressor, the pipe member having a hole opened in the liquid refrigerant within the gas-liquid separator, from which oil in the gas-liquid separator is introduced into the compressor; and a liquid refrigerant introduction pipe through which liquid refrigerant in the gas-liquid separator is introduced into the evaporator, wherein: the liquid refrigerant introduction pipe has a throttle means for decompressing refrigerant at an outlet side; the ejector includes a nozzle in which a pressure energy of refrigerant flowing from the radiator is converted to a speed energy so that refrigerant is decompressed and expanded, and a pressure increasing portion in which the pressure of refrigerant to be discharged is increased while refrigerant jetted from the nozzle and gas refrigerant sucked from the evaporator are mixed; the pressure increasing portion is inserted into the gas-liquid separator such that refrigerant flows through the pressure increasing portion from below upwardly; and the pressure increasing portion has refrigerant outlet from which refrigerant in the ejector is discharged into the gas-liquid separator.