Variable displacement refrigerant compressor of variable angle wobble plate type
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsKatsunori Kawai, Hiroyuki Deguchi, Hisao Kobayashi, Shuichi Sugizono
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Abstract
A variable displacement refrigerant compressor of the variable angle wobble or swash plate type is disclosed. The compressor according to the invention has a displacement control valve which is operable in response to the evaporator pressure so as to restrict the drop thereof by throttling the refrigerant gas flowing through a control port disposed between the evaporator and suction chamber. Crankcase of the compressor is arranged for direct communication with the evaporator so as to keep the crankcase under a pressure which is substantially the same as the evaporator pressure.
Claims7
A variable displacement refrigerant compressor of the variable angle wobble plate type arranged in a refrigerating system having an evaporator connected to the suction side of said compressor, comprising:
- a cylinder block;
- a plurality of cylinders formed in said cylinder block and each having therein a reciprocable piston;
- a suction chamber;
- a crankcase formed in constant communication with the outlet of said evaporator;
- a variable angle wobble plate drive mechanism disposed in said crankcase and having a rotatable drive shaft, a drive plate rotatable with said shaft and tiltable with respect to the axis thereof and a non-rotary wobble plate connected to each said piston by a connecting rod and tiltable with said drive plate in response to the pressure differential between said crankcase and suction chamber so as to change the stroke of said reciprocable piston and hence the displacement of the compressor;
- and
- control valve means operable in response to evaporator pressure for effecting controlled communication between said evaporator and suction chamber.
Dependencies are inferred from the claim text.