Patent ID: 6834511
Filing Date: 2004-12-28
Classification: B60H,F25B

Abstract:
A vehicle air conditioning apparatus comprising:a heat-radiating inside-vehicle-compartment heat exchanger adapted to radiate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment for condensing refrigerant; expansion means for expanding the refrigerant condensed in the heat-radiating inside-vehicle-compartment heat exchanger; a heat-absorbing inside-vehicle-compartment heat exchanger adapted to compel heat of the air stream inside the vehicle compartment to be absorbed by the refrigerant expanded by the expansion means; a variable displacement compressor adapted to be driven by an engine to compress the refrigerant evaporated in the heat-absorbing inside-vehicle-compartment heat exchanger; blow-off temperature detection means for detecting at least one of a blow-off temperature or a numeric value correlated with the blow-off temperature; compressor control means operative to control a discharge refrigerant volume of the variable displacement compressor such that the blow-off temperature lies at a given temperature responsive to a detection result of the blow-off temperature detection means; and heating means for heating the heat-radiating inside-vehicle-compartment heat exchanger.