Variable capacity compressor

F - Mech Eng,Light,Heat,Weapons – 04 – B

Patent

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62/28, 230/51

F04B 25/00 (2006.01) F04B 35/04 (2006.01) F04B 41/06 (2006.01) F25B 31/02 (2006.01) H02K 7/14 (2006.01) H02K 16/00 (2006.01) F16N 7/36 (2006.01)

Patent

CA 1094520

ABSTRACT OF THE DISCLOSURE A variable capacity compressor for refrigeration systems such as air conditioners and heat pumps comprising an outer casing having a lubricant sump in the lower portion thereof, a crankcase internally spring mounted within the outer casing and having a pair of parallel, vertical crankshafts rotatably supported therein, wherein the crankshafts are arranged in side-by-side relationship, and at least two expandable chamber pumps, which may be piston, rotary or screw type, driven by the crankshafts. A pair of inde- pendently controlled electric motors have their rotors drivingly connected to the crankshafts, and in one embodiment of the inven- tion, the motors have a common stator with two independently con- trolled sets of windings. In a further embodiment of the invention, two crankcases are provided, sharing a common lubricant sump.

313601

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