F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
230/77
F04B 1/26 (2006.01) F04B 27/18 (2006.01)
Patent
CA 1331455
FLOW SENSITIVE SLANT PLATE TYPE COMPRESSOR WITH VARIABLE DISPLACEMENT MECHANISM ABSTRACT OF THE DISCLOSURE A refrigerant compressor including a compressor housing hav- ing a cylinder block is disclosed. A plurality of cylinders are formed around the periphery of the cylinder block and a piston is slidably fitted within each of the cylinders and is reciprocated by a drive mechanism. A crank chamber is formed between the cylinder block and a front end plate of the compressor housing. The drive mecha- nism includes a drive shaft, a rotor disposed on said drive shaft, a slant plate with an adjustable slant angle disposed adjacent the rotor, and a wobble plate disposed adjacent the slant plate. The drive shaft is rotatably supported within the front end plate. Rotation of the drive shaft causes rotation of the rotor and the slant plate, causing nutational motion of the wobble plate to reciprocate the pistons within their cylinders. The compressor housing includes a rear end plate including suction and discharge chambers. An inlet portion of the suction chamber and an outlet portion of the discharge chamber link the compressor with an external fluid circuit. The inlet portion is linked to an external evaporator. A narrowed portion is located between the inlet portion of the suction chamber and a main portion is the suction chamber and creates a pressure difference there- between. A communication path links the crank chamber and the suction chamber and is controlled by a valve control means. When the capacity of the compressor is changed, the valve control means links the crank chamber with the external evaporator via the inlet portion due to the pressure difference created by the narrowed por- tion to reduce the outlet pressure thereof, preventing a decrease in efficiency of the evaporator.
572872
Sanden Corporation
Sim & Mcburney
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