VEHICLE AIR CONDITIONING APPARATUS

摘要

A vehicle air conditioning apparatus includes an outdoor expansion valve controller configured to control an evaporating temperature of a refrigerant in a heat exchanger by regulating an opening of an outdoor expansion valve during a heating and dehumidifying operation, an evaporating temperature control valve provided in a refrigerant flow passage to an output side of the heat exchanger from which the refrigerant is discharged, and configured to control the evaporating temperature of the refrigerant in the heat exchanger by regulating an amount of the refrigerant flowing through the refrigerant flow passage, a temperature detector configured to detect a temperature of the refrigerant in the heat exchanger, and a control changer configured to change control of the evaporating temperature of the refrigerant in the heat exchanger from by regulating an opening of the outdoor expansion valve to by regulating an opening of the evaporating temperature control valve.

主权项

1. A vehicle air conditioning apparatus comprising:
a compressor configured to compress and discharge a refrigerant; a radiator provided in a vehicle interior and configured to release heat from the refrigerant; a heat exchanger provided in the vehicle interior and configured to absorb the heat into the refrigerant; an outdoor heat exchanger provided outside the vehicle interior and configured to release the heat from or absorb the heat into the refrigerant; an indoor expansion valve configured to decompress the refrigerant flowing into the heat exchanger; and an outdoor expansion valve configured to decompress the refrigerant flowing into the outdoor heat exchanger, the vehicle air conditioning apparatus performing a heating and dehumidifying operation to release the heat from the refrigerant discharged from the compressor in the radiator; to decompress part of the refrigerant by the indoor expansion valve and absorb the heat into the part of the refrigerant in the heat exchanger; and to decompress remaining refrigerant by the outdoor expansion valve and absorb the heat into the remaining refrigerant in the outdoor heat exchanger, the vehicle air conditioning apparatus further comprising: an outdoor expansion valve controller configured to control an evaporating temperature of the refrigerant in the heat exchanger by regulating an opening of the outdoor expansion valve during the heating and dehumidifying operation; an evaporating temperature control valve provided in a refrigerant flow passage to an output side of the heat exchanger from which the refrigerant is discharged, and configured to control the evaporating temperature of the refrigerant in the heat exchanger by regulating an amount of the refrigerant flowing through the refrigerant flow passage; a temperature detector configured to detect a temperature of the refrigerant in the heat exchanger; and a control changer configured to change control of the evaporating temperature of the refrigerant in the heat exchanger from by regulating an opening of the outdoor expansion valve to by regulating an opening of the evaporating temperature control valve.