Variable capacity wobble plate compressor
AssigneeBorg-Warner Corporation
InventorsRichard W. Roberts, Ralph D. Salle
Life of this patent
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Abstract
A controlled, variable displacement, wobble plate compressor includes a pivotable wobble plate driven through an improved drive and support linkage including a universal joint and having its pivot point offset from the axis of the drive shaft so that at the "no stroke" position the pistons are all disposed at their top-dead-center positions. The capacity of the compressor is controlled by an improved system for varying the position of the wobble plate.
Claims6
In an air conditioning apparatus of the type including a condenser, an evaporator and a compressor connected to provide a closed circuit, compression-condensing-evaporation refrigeration system, said compressor comprising means defining a plurality of refrigerant gas working spaces each having a piston cooperating with suction and discharge ports to compress a fluid therein;
- a drive shaft;
- a wobble plate driven by said drive shaft in a nutating path about the drive shaft axis;
- means operably connected between said wobble plate and the individual pistons to impart reciprocating drive to said pistons, the length of stroke being a function of the angle at which said wobble plate is supported relative to the drive axis;
- means for pivoting said wobble plate at a point spaced from said drive axis so as to permit said wobble plate to be inclined relative to a plane normal to said drive shaft axis, so that when the wobble plate is disposed in said normal plane, the pistons are located at top-dead-center within said gas working spaces;
- said pistons being enclosed in a fluid tight housing providing a crankcase which is pressurized by fluid bypassing said pistons from said gas working spaces;
- and means for controlling the pressure within said crankcase including means for sensing pressure of fluid in said evaporator.
Dependencies are inferred from the claim text.