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    • 22. 发明申请
    • VARIABLE DISPLACEMENT TYPE COMPRESSOR WITH DISPLACEMENT CONTROL MECHANISM
    • 具有位移控制机构的可变位移式压缩机
    • US20090269216A1
    • 2009-10-29
    • US12429439
    • 2009-04-24
    • Masaki OtaMasahiro KawaguchiHideharu YamashitaHiroshi KuboRyo Matsubara
    • Masaki OtaMasahiro KawaguchiHideharu YamashitaHiroshi KuboRyo Matsubara
    • F04B1/29
    • F04B27/1804F04B2027/1813F04B2027/1827F04B2027/1831F04B2027/1872
    • A variable displacement type compressor in which a discharge-pressure region, a suction-pressure region and a pressure control chamber are defined, has a tiltable swash plate and a piston reciprocated by the swash plate in the pressure control chamber. The inclination angle of the swash plate and the piston stroke are changed by adjustment of pressure in the pressure control chamber thereby to control the displacement of the compressor. The compressor further comprises a supply passage for supplying refrigerant gas from the discharge-pressure region to the pressure control chamber, a release passage for releasing the refrigerant gas from the pressure control chamber to the suction-pressure region, a first control valve for adjusting a cross-sectional area of the supply passage from the discharge-pressure region to the pressure control chamber and a second control valve for adjusting cross-sectional area of the release passage. The second control valve includes a valve body for opening and closing the release passage whose cross-sectional area is set minimum when the valve body is located at the closed position and a valve spring for urging the valve body in a direction to open the release passage. When the second control valve is closed, pressure in the supply passage downstream the first control valve acts on the valve body in a direction to close the release passage and pressure in the suction-pressure region acts on the valve body in a direction to open the release passage.
    • 限定了排气压力区域,吸入压力区域和压力控制室的可变排量型压缩机具有可倾斜的斜盘和在压力控制室中由斜盘往复运动的活塞。 通过调节压力控制室中的压力来改变斜板和活塞冲程的倾斜角度,从而控制压缩机的排量。 压缩机还包括供给通路,用于将制冷剂气体从排出压力区域供给至压力控制室,将制冷剂气体从压力控制室释放到吸入压力区域的释放通道,第一调节阀 从排出压力区域到压力控制室的供给通道的横截面面积和用于调节释放通道的横截面面积的第二控制阀。 第二控制阀包括用于打开和关闭释放通道的阀体,其中当阀体位于关闭位置时,其截面面积被设定为最小值;以及阀弹簧,用于沿打开释放通道的方向推压阀体 。 当第二控制阀关闭时,第一控制阀下游的供给通道中的压力沿着关闭释放通道的方向作用在阀体上,并且吸入压力区域中的压力沿打开方向的阀体作用 释放通道