Patent ID: 8961158
Filing Date: 2015-02-24
Classification: F04C

Abstract:
1. A scroll compressor comprising: a stationary scroll having a stationary panel and a spiral stationary lap provided on one surface of the stationary panel; a movable scroll having a movable panel and a spiral movable lap provided on one surface of the movable panel, the stationary lap and the movable lap being brought together to form a compression chamber between the stationary and movable laps; and a drive shaft coupled to the movable scroll to cause the movable scroll to revolve in response to rotation of the rotation of the drive shaft, the drive shaft having a longitudinal center axis of rotation extending in an axial direction, with a radial direction being relative to the longitudinal center axis, a side of the movable panel that is opposite of a side where the movable lap is formed defining an axial end of a back pressure chamber, the surface of the stationary panel where the stationary lap is formed having at least one intermediate pressure groove formed therein that communicates with the compression chamber, the intermediate pressure groove having a radially inner end open in a radially inward direction to the compression chamber, and the movable panel having at least one hole formed therethrough in a thickness direction of the movable panel at a location radially outward of the radially inner end of the intermediate pressure groove, wherein when the scroll compressor operates such that movement of the movable panel occurs, the movement of the moveable panel intermittently locates the at least one hole in a position so that the intermediate pressure groove and the back pressure chamber communicate one to another through the at least one hole.