CAPACITY CONTROL VALVE

摘要

A capacity control valve having a valve body (40) integrally provided with a first valve section (41) that opens and closes a discharge side path for communicating a discharge chamber (11) and a control chamber (12) and with a second valve section (42) that opens and closes a suction side path for communicating a suction chamber (13) and the control chamber (12); a pressure sensitive body (50) provided in a third valve chamber (38) in the middle of the suction side path; a valve seat body (53) provided at the pressure sensitive body (50); a third valve section (43) joined to the valve body (40) and opening and closing the suction side path by being engaged with and disengaged from the valve seat body (53); and other elements. Either an engagement surface (43a) of the third valve section or a seat surface (53a) of the valve seat body is formed in a spherical shape having a curvature radius R of 9 mm < R < 11 mm. Also, the other of the engagement surface (43a) of the third valve section or the seat surface (53a) of the valve seat body is formed in a tapered surface having a center angle a in the range of 120° < a < 160°. The construction enables liquid refrigerant etc. collected in the control chamber to be efficiently discharged, so that a predetermined capacity control can be quickly performed.