To damp compression load by a simple structure by communicating the compression chamber of a cylinder bore to which a moving delivery valve does not correspond, with a second control chamber by a pressure feed path provided with a throttle, feeding the pressure of a compressor to a second control chamber when the compressor is started, and letting the pressure of the second control chamber go to the compressor when the compressor is suspended.
The delivery cycle is started at a compressor chamber at the front side by the reciprocal movement of a piston 22, and mean while refrigerant gas sucked in a compressing chamber 24 at the rear side is not compressed but is delivered because a moving delivery valve 53 is disposed in an inoperative position. In this place, refrigerant gas in the compressing chamber 24 is fed to a second control chamber 59 from a first passage acting as a throttle by way of a pressure feed passage 63. After the specified period of time has elapsed, the difference in pressure between the second and a first control chamber 59 and 58 exceeds the energizing force of a spring 57 so as to allow a spool to be moved forward, and the moving delivery valve 53 is moved to an operating position, so that a compressing operation is thereby started. The suspension of the reciprocal movement of the piston 22 allow the pressure of the second control chamber 59 to be relieved to a pressure feed passage 68, and also allow the moving delivery valve 53 to be disposed at an inoperative position.
| WO/2019/099054 | A MULTI-CHAMBER WOBBLE PLATE PUMP |
| JPH11230031 | SWASH PLATE COMPRESSOR |
UMEMURA SATOSHI
IKEDA ISATO
TOKUSHIGE TAKAHISA
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