Scroll type compressor with seal supporting anti-wear plate portions

Abstract

A scroll type compressor is disclosed which includes a housing with an inner chamber and fluid inlet and outlet ports connected to the inner chamber. A fixed scroll, which is mounted within the housing, has an end plate from which a first spiral wrap extends. An orbiting scroll also is mounted within the housing for orbital motion with respect to the fixed scroll. The orbiting scroll has an end plate from which a second spiral wrap extends; and the first and second wraps interfit to define at least one pair of sealed off fluid pockets. The end plate of the fixed scroll partitions the inner chamber of the housing into a suction chamber and rear chamber. The end plate of the fixed scroll has at least one pair of holes for adjusting the displacement of the compressor. A control mechanism selectively controls fluid communication through the holes. The axial end surface of the second wrap is provided with a seal element which forms an axial seal between the second wrap and the end plate of the fixed scroll. An anti-wear plate is disposed on the end surface of the fixed end plate to prevent from friction between the seal element and end surface of the end plate. The anti-wear plate has cut-out portions facing the holes. Each cut-out portion has a predetermined shape and area to prevent cutting of the seal element and to minimize pressure loss.