Scroll type compressor having an oil separator and oil sump in the

Abstract

A scroll type compressor unit including a compressor housing having fluid inlet and outlet ports, and two fixed and orbiting scroll members within the compressor housing. Each scroll member has an end plate and a spiral element which are maintained angularly and radially offset so that both spiral elements interfit with a line contacts between the spiral curved surfaces to define moving sealed off pockets. In order that the fluid may be reliably taken into all fluid pockets, the end plate of the fixed scroll member is formed with a suction port connecting to the fluid inlet port at a position adjacent to the outer terminal end of the orbiting spiral element. Thus, the fluid introduced through the suction port may be taken into a fluid pocket which is formed at the outer terminal end portion of the orbiting spiral element and is sent along the outer surface of the orbiting spiral element to a fluid pocket which is formed at the outer terminal end of the fixed spiral element. The fixed spiral element is formed so that its outer terminal end engages with the inner surface of the compressor housing, and a seal plate member is disposed to close the gap between the inner surface of the housing and the peripheral surface of the orbiting end plate. This permits the fluid sent to the outer terminal end portion of the fixed spiral element to be pre-compressed.