Patent ID: 8021124

Claim:
A capacity control valve for controlling a discharge amount of a variable capacity compressor that includes a discharge chamber for discharging a fluid, a suction chamber for sucking the fluid and a control chamber communicating with the discharge chamber and the suction chamber, said capacity control valve comprising: a discharge-side path for putting the discharge chamber in communication with the control chamber; a first valve chamber formed in said discharge-side path; a suction-side path for putting the suction chamber in communication with the control chamber; a second valve chamber formed in said suction-side path; a valve body integrally having a first valve portion for opening/closing said discharge-side path in said first valve chamber and a second valve portion for opening/closing said suction-side path in said second valve chamber, said first and second valve portions carrying out opening/closing operation opposite to each other by reciprocating motion; a third valve chamber formed closer to a side of the capacity control valve to be connected to the control chamber than said second valve chamber; a pressure sensitive body arranged in said third valve chamber, said pressure sensitive body applying an urging force in a direction to open said first valve portion by expansion of the pressure sensitive body, and contracting with increase in pressure of a surroundings of the pressure sensitive body; a valve seat body provided at a free end in an expansion/contraction direction of said pressure sensitive body and having a seat face that is ring-like; a third valve portion moving integrally with said valve body in said third valve chamber and having an engagement face that is ring-like, the engagement face opening/closing said suction-side path by engagement and disengagement with the seat face of said valve seat body; and a solenoid applying an electromagnetic driving force in a direction to close said first valve portion with respect to said valve body, wherein one of the engagement face of said third valve portion and the seat face of said valve seat body is formed into a rounded shape; and wherein the other of the engagement face of said third valve portion and the seat face of said valve seat body is formed into a tapered surface shape having a center angle α with respect to a direction of movement of the third valve portion, the center angle α satisfying 120°<α<160°.