Variable displacement compressor

摘要

A compressor comprises a drive shaft supported in a housing, a piston accommodated in a cylinder bore and connected to the drive plate, a valve plate for separating the cylinder bore from the suction chamber and the discharge chamber. A discharge passage passes through the housing and the valve plate to connect the discharge chamber to the external circuit. Gas is sent from the discharge chamber to the external circuit through the discharge passage. A check valve is located on the valve plate to selectively open and close the discharge passage. The check valve checks gas flow from the external circuit to the discharge chamber. This prevents the pressure in the crank chamber from increasing to an excessive degree.