Patent ID: 7018179
Filing Date: 2006-03-28
Classification: F04B

Abstract:
1. A capacity control valve for a variable displacement compressor, for controlling an amount of refrigerant introduced from a discharge chamber into a pressure-regulating chamber, such that the differential pressure between a pressure in a suction chamber and a pressure in the discharge chamber is held at a predetermined differential pressure, to thereby change an amount of the refrigerant discharged from the variable displacement compressor, comprising: a first valve inserted into a first refrigerant passage between a first port communicating with the discharge chamber and a second port communicating with the pressure-regulating chamber, for opening and closing the first refrigerant passage; and a second valve inserted into a second refrigerant passage between the second port communicating with the pressure-regulating chamber and a third port communicating with the suction chamber, a valve seat of the second valve having the same effective diameter as that a valve seat of the first valve, for opening and closing the second refrigerant passage in conjunction with the first valve, and a solenoid for applying a load to the first valve in a valve-closing direction, and to the second valve in a valve-opening direction, the load being dependent on a value of supply current.