SCROLL TYPE COMPRESSOR WITH VARIABLE DISPLACEMENT MECHANISM

摘要

A variable displacement mechanism for a scroll type compressor opens and closes a communication path between the suction chamber and a pair of intermediately located sealed spaces. The variable displacement mechanism includes a piston valve member slidably disposed within a cavity. The piston valve selectively opens and closes the communication path between the suction chamber and intermediately located sealed spaces. A conduit permanently links the discharge chamber to the upper end surface of the piston valve so that, even when the communication path is established, the upper end surface of the piston valve is constantly exposed to discharge pressure.