Patent ID: 7648346

Claim:
A variable displacement compressor in which variable control of displacement is effected through adjustment of a crank chamber pressure, comprising: a suction port; a suction chamber; a suction passage establishing communication between the suction port and the suction chamber; and an opening control valve arranged in the suction passage and adapted to adjust an opening of the suction passage based on a pressure difference between a suction pressure in the suction port and the crank chamber pressure, wherein the opening control valve includes: a valve chamber; a valve body movably arranged inside the valve chamber, said valve body receives the suction pressure so as to experience a suction pressure force acting in a direction of the suction port being opened; a communication passage establishing communication between the crank chamber and the valve chamber; a movable member movably arranged inside the valve chamber, said movable member receives the crank chamber pressure introduced into the valve chamber through the communication passage so as to experience a crank chamber pressure force in a direction of the suction port being closed; and an urging member urging the movable member and the valve body away from each other.