초록 ▼

The present invention provides an air conditioning apparatus for automobiles equipped with a heat exchanger and a control method for the apparatus, by which the heat transfer area of the heat exchanger can be properly controlled to permit a stable cycle operation, even when the capacity of a condens

The present invention provides an air conditioning apparatus for automobiles equipped with a heat exchanger and a control method for the apparatus, by which the heat transfer area of the heat exchanger can be properly controlled to permit a stable cycle operation, even when the capacity of a condenser is relatively overly enhanced under a condition of the low atmospheric temperature. The apparatus and the control method are achieved with such an arrangement that either one or both of headers of a heat exchanger is provided with at least one refrigerant flow rate control valve capable of opening and closing refrigerant passages in each header, the heat exchanger has a refrigerant inlet provided in one header and a refrigerant outlet provided in the other header, and the control valve is opened and closed to change the number of the passages allowing the refrigerant to pass therethrough, for thereby changing the effective heat transfer area for heat exchange dependent on the atmospheric temperature.

대표청구항 ▼

An air conditioning apparatus comprising a compressor; a condenser connected to the discharge side of said compressor, said condenser being comprised of a pair of headers disposed parallel to each other and having refrigerant passages formed therein, a plurality of heat transfer pipes arranged betwe

An air conditioning apparatus comprising a compressor; a condenser connected to the discharge side of said compressor, said condenser being comprised of a pair of headers disposed parallel to each other and having refrigerant passages formed therein, a plurality of heat transfer pipes arranged between said headers to form refrigerant passages, a number of fins disposed in respective air passage spaces between adjacent pairs of said heat transfer pipes, and a refrigerant flow rate control valve for opening and closing the refrigerant passage in at least one of said headers; an expansion valve connected to the outlet side of said condenser; an evaporator connected between the outlet side of said expansion valve and the suction side of said compressor; and control means for controlling an opening and closing operation of said refrigerant flow rate control valve, wherein said refrigerant flow rate control valve is controlled by said control means to be opened and closed for changing the effective heat transfer area of said condenser.