Patent ID: 7708536
Filing Date: 2010-05-04
Classification: F04C,Y10S

Abstract:
1. A scroll-type refrigerant compressor comprising: a sealed enclosure defined by a shell and containing a suction volume and a compression volume at opposite ends of the enclosure, one on either side of a body, the shell comprising a refrigerant gas inlet, an electric motor on the suction side having a stator and defining with the shell an annular volume, and a rotor connected to a drive shaft in the form of a crankshaft, a first end of which drives an oil pump supplying oil from a sump in the bottom of the enclosure to a channel formed in the central part of the shaft, the compression volume containing a stationary volute equipped with a scroll engaged in a scroll of a moving volute, the two scrolls defining at least one variable-volume compression chamber, and the second end of the drive shaft being equipped with a device driving the moving volute in an orbital movement to compress the suction gas, wherein the stator is surrounded by an intermediate jacket defining on the one hand an annular volume with the shell and on the other hand a chamber which contains the motor winding end and is directed towards the compression volume side, an end of the intermediate jacket directed away from the compression volume being located at an end of the stator which is directed away from the compression volume or set back therefrom, while conveying means are provided for conveying at least some of the gas arriving at the gas inlet formed in the shell into the chamber containing the motor winding end, and the intermediate jacket has a gas intake orifice opening into the chamber containing the motor winding end, and gas conveyed by the conveying means is admitted into the chamber containing the winding end through the gas intake orifice.