AIR CONDITIONING DEVICE FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To reduce cost by lowering pressure resistance strength and repeated pressurization strength in a heat exchanger being a heat absorber in a cooling operation mode when two heat exchangers arranged in a vehicle cabin are used as a radiator in a heating operation mode and either of them is used as the heat absorber in the cooling operation mode.SOLUTION: A heat pump device 20 includes: a refrigerant inlet 50a connected to a downstream cabin heat exchanger 31; a heating side refrigerant outlet 50b connected to an upstream cabin heat exchanger 32; an unheated side refrigerant outlet 50c connected to a portion other than the upstream cabin heat exchanger 31 in the heat pump device 20; and a switch valve 50d making the refrigerant inlet 50a communicate with the unheated side refrigerant outlet 50c when an internal pressure in the upstream cabin heat exchanger 32 reaches a predetermined one.