Capacity control valve

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°.