Variable displacement compressor

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

Patent

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Details

F04B 1/29 (2006.01) B60H 1/32 (2006.01) F04B 27/18 (2006.01) F04B 49/12 (2006.01) F04B 49/22 (2006.01)

Patent

CA 2221475

A housing of a compressor has a shutter chamber for accommodating a shutter. The shutter moves between a closed position, where the shutter stops flow of gas from an external circuit into a suction chamber, and an open position, where the shutter permits the gas flow in response to the tilting motion of a swash plate. A coil spring, which has a conical shape, is located in the shutter chamber to bias the shutter in a direction toward the open position from the closed position. The spring is arranged to prevent the spring from sliding against the inner wall of the shutter chamber when the spring is expanded or contracted by movement of the shutter member.

L'invention concerne une enveloppe de compresseur comportant un compartiment pouvant recevoir un volet. Le volet se déplace d'une position fermée, où il interrompt l'écoulement de gaz provenant d'un circuit extérieur dans une chambre d'aspiration, et une position ouverte, où il autorise l'écoulement de gaz en réaction au basculement d'un plateau oscillant. Un ressort hélicoïdal, de forme conique, se trouvant dans le compartiment du volet pousse celui-ci de la position fermée à la position ouverte. Le ressort est disposé de manière à ne pas glisser contre la paroi intérieure du compartiment du volet lorsque le ressort est étiré ou contracté par le mouvement du volet.

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