Patent ID: 6385982
Filing Date: 2002-05-14
Classification: B60H,F04B,F25B

Abstract:
An air-conditioning system comprising:a refrigerant circulation circuit including a condenser, a depressurizing unit, an evaporator and a variable displacement type compressor; two pressure monitoring points located in the refrigerant circulation circuit; a differential pressure detector for detecting a differential pressure between the pressures of a refrigerant at the two pressure monitoring points; an external information detector, which previously or simultaneously detects a variation in a cooling load and detects other external information; a means for determining a set differential pressure between the two pressure monitoring points based on the variation in the cooling load previously or simultaneously detected by the external information detector; and a displacement control unit for performing feedback control of the discharge capacity of the compressor such that the differential pressure detected by the differential pressure detector converges to the set differential pressure.