Patent ID: 8429931

Claim:
An ejector refrigerant cycle device comprising: a compressor compressing and discharging refrigerant; a radiator radiating heat of high-temperature and high-pressure refrigerant discharged from the compressor; a branch portion branching a flow of refrigerant on a downstream side of the radiator into a first stream and a second stream; an ejector located on a downstream side of the branch portion, the ejector including a nozzle portion decompressing and expanding refrigerant of the first stream, and a refrigerant suction port from which refrigerant is drawn from the second stream by a high-velocity flow of refrigerant jetted from the nozzle portion; a first decompressing portion decompressing refrigerant of the second stream branched from the branch portion; a first evaporator evaporating refrigerant on a downstream side of the first decompressing portion, the first evaporator being disposed in the second stream and having a refrigerant outlet coupled to the refrigerant suction port of the ejector; a second decompressing portion decompressing refrigerant of the second stream in a vapor-liquid two-phase state, the second decompressing portion being located downstream of the branch portion and upstream of the first decompressing portion in a refrigerant flow of the second stream; and an inner heat exchanger having a first refrigerant passage portion through which refrigerant of the second stream flows, and a second refrigerant passage portion through which refrigerant to be drawn to the compressor flows, wherein the first refrigerant passage portion and the second refrigerant passage portion of the inner heat exchanger are configured to perform heat exchange between refrigerant flowing through the first refrigerant passage portion and refrigerant flowing through the second refrigerant passage portion, wherein the first decompressing portion is provided in the first refrigerant passage portion of the inner heat exchanger, integrally with the inner heat exchanger; and the first decompressing portion causing the refrigerant to radiate heat simultaneously with the decompression of the refrigerant of the second stream branched from the branch portion.