Patent ID: 6171086
Filing Date: 2001-01-09
Classification: F04C

Abstract:
A scroll compressor comprising:a non-orbiting scroll having a base and a spiral wrap extending from said base;an orbiting scroll having a base and a spiral wrap extending from said base, said wraps of said non-orbiting and orbiting scrolls interfitting, said orbiting scroll being driven for orbital movement relative to said non-orbiting scroll such that said wraps of said non-orbiting and orbiting scroll cyclically interacting with each other to define seal points separating compression chambers, and movement of said orbiting scroll wraps moving said compression chambers inwardly to communicate with a central discharge port, with at least two of said compression chambers eventually communicating with each other and said discharge port; anda pressure equalization groove having two opposed ends and formed in an outer face of the base of at least one of said non-orbiting and orbiting scrolls, said outer face facing the other of said other non-orbiting and orbiting scrolls a first of said ends selectively communicating with one of said two compression chambers and a second of said ends selectively communicating with the other of said two compression chambers at a location after said orbiting scroll has interacted with said non-orbiting scroll to seal said two compression chambers, and prior to said two compression chambers being communicated to each other and said discharge port.