Patent ID: 9581149
Date: 2017-02-28
CPC Classifications: F04B

Claim:
1. A double-headed piston type swash plate compressor comprising: a housing; a rotation shaft; a swash plate that is rotated by a driving force of the rotation shaft, wherein the swash plate is configured to vary an inclination angle with respect to the rotation shaft; a crank chamber that is formed in the housing and accommodates the swash plate; a double-headed piston that engages with the swash plate, wherein the double-headed piston reciprocates with a stroke according to the inclination angle of the swash plate; a movable body that is connected with the swash plate to vary the inclination angle of the swash plate; a control pressure chamber that is arranged in the housing and defined by the movable body, wherein the control pressure chamber is configured to move the movable body in an axial direction of the rotation shaft when the control pressure chamber is supplied with a control gas to change a pressure inside the control pressure chamber; a discharge pressure region; a suction pressure region; a supplying passage that extends from the discharge pressure region to the control pressure chamber; a narrowing portion that narrows an opening degree of the supplying passage; an exhaust passage that extends from the control pressure chamber to the suction pressure region; and a displacement control valve that controls a pressure in the control pressure chamber, wherein the displacement control valve includes: wherein the narrowing portion has a passage cross-sectional area that is larger than a passage cross-sectional area of the clearance.