VEHICLE AIR CONDITIONER

摘要

There is disclosed a vehicle air conditioner which can enlarge an effective range of a dehumidifying and cooling mode to realize comfortable air condition in a vehicle interior. A controller changes and executes at least one of a heating mode, a dehumidifying and heating mode, a dehumidifying and cooling mode, and a cooling mode. In at least the dehumidifying and cooling mode, the controller controls a capability of a compressor 2 on the basis of a temperature of a heat absorber 9, and controls a valve position of an outdoor expansion valve 6 on the basis of a temperature or a pressure of the radiator 4, and executes a radiator temperature prior mode to enlarge the capability of the compressor 2, in a case where heat radiation in the radiator 4 runs short.

主权项

1. A vehicle air conditioner comprising:
a compressor which compresses a refrigerant; an air flow passage through which air to be supplied into a vehicle interior flows; a radiator disposed in the air flow passage to let the refrigerant radiate heat; a heat absorber disposed in the air flow passage to let the refrigerant absorb heat; an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant radiate or absorb heat; an expansion valve which decompresses the refrigerant flowing into the outdoor heat exchanger; and control means, the control means being configured to change and execute at least one of: a heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the outdoor heat exchanger; a dehumidifying and heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator and the refrigerant by which heat has been radiated is decompressed and then absorbs heat only in the heat absorber or in the heat absorber and the outdoor heat exchanger; a dehumidifying and cooling mode in which the refrigerant discharged from the compressor radiates heat in the radiator and the outdoor heat exchanger and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; and a cooling mode in which the refrigerant discharged from the compressor radiates heat in the outdoor heat exchanger and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber, wherein in at least the dehumidifying and cooling mode, the control means controls a capability of the compressor on the basis of a temperature of the heat absorber, and controls a valve position of the expansion valve on the basis of a temperature or a pressure of the radiator, and executes a radiator temperature prior mode to enlarge the capability of the compressor, in a case where heat radiation in the radiator runs short.