Patent ID: 7451610

Claim:
A vehicle air conditioning system equipped with a refrigerant circuit which includes an electrically operated compressor, a heat exchanger, an expansion valve, and an evaporator that are sequentially pipe-connected in a circular form, in which compression and heat release of a refrigerant are performed by the electrically operated compressor and the heat exchanger provided outside a passenger compartment, and in which the passenger compartment is cooled by the evaporator provided inside the passenger compartment, the vehicle air conditioning system comprising: an outer-compartment controller for frequency control of an operation of the electrically operated compressor; and an inner-compartment controller to which a predetermined operation input is performed and to which information regarding the inside of the passenger compartment is input, wherein the outer-compartment controller calculates an operating frequency of the electrically operated compressor on the basis of information from the inner-compartment controller to operate the electrically operated compressor; and wherein the outer-compartment controller calculates an opening of the expansion valve on the basis of the information from the inner-compartment controller to control the expansion valve.