| abstract |
An ejector cycle system having a refrigerant circuit through which refrigerant flows, comprising: a compressor (11, 61-64) that sucks and compresses refrigerant; a radiator (12) that radiates heat from high-pressure refrigerant discharged from the compressor; an ejector (15) disposed downstream of the radiator, the ejector having a nozzle portion (15a) for depressurizing and expanding refrigerant, a refrigerant suction port (15b) through which refrigerant is sucked by a high-speed refrigerant flow discharged from the nozzle portion and a pressure increasing section (15c, 15d) for mixing refrigerant sucked through the refrigerant suction port with the high-speed refrigerant flow and delaying the mixed refrigerant flow to increase a pressure of the refrigerant flow; a first evaporator (16) evaporating refrigerant flowing from the ejector; a branch passage (18) branched from a branch portion (Z) between the radiator and the ejector and coupled to the refrigerant suction port to guide refrigerant from the radiator into the refrigerant suction port; a throttle unit (19, 30, 34, 37, 39, 44) located in the branch passage and depressurizing refrigerant for adjusting a flow rate of refrigerant; a second evaporator (20) located downstream of the throttle unit and evaporating refrigerant; and ... |