Patent ID: 7340908
Filing Date: 2008-03-11
Classification: B60H,F25B

Abstract:
1. A refrigerant cycle device for a vehicle, comprising: a compressor which compresses refrigerant; a refrigerant radiator for cooling high-pressure refrigerant discharged from the compressor; an ejector which includes a nozzle for decompressing and expanding refrigerant from the refrigerant radiator, a refrigerant suction port from which refrigerant is drawn by a refrigerant steam jetted from the nozzle, and a pressure-increasing portion in which the refrigerant jetted from the nozzle and the refrigerant drawn from the refrigerant suction port are mixed and pressure of the refrigerant is increased by converting speed energy to pressure energy; a first evaporator for evaporating refrigerant flowing out of the pressure-increasing portion of the ejector, the first evaporator being located at a downstream side of the ejector and having a refrigerant outlet coupled to a refrigerant suction side of the compressor; a first branch passage through which a refrigerant downstream side of the refrigerant radiator is connected to a refrigerant suction port of the ejector; a first throttle member, located in the first branch passage, for decompressing refrigerant from the refrigerant radiator; a second evaporator for evaporating refrigerant to be drawn into the refrigerant suction port, the second evaporator being located in the first branch passage at a refrigerant downstream side of the first throttle member, wherein the ejector, the first evaporator and the second evaporator are arranged in a passenger compartment of the vehicle; a refrigerant suction pipe between a refrigerant outlet of the second evaporator and the refrigerant suction port of the ejector, the refrigerant suction pipe being provided to define a part of the first branch passage; and an insulating member provided on a surface of the refrigerant suction pipe, wherein the refrigerant suction pipe is arranged in the passenger compartment.