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    • 5. 发明授权
    • Apparatus and method for controlling variable displacement compressor
    • 用于控制可变排量压缩机的装置和方法
    • US06672844B2
    • 2004-01-06
    • US10040860
    • 2001-11-09
    • Tetsuhiko FukanumaAtsuyuki MorishitaTomohiko Yokono
    • Tetsuhiko FukanumaAtsuyuki MorishitaTomohiko Yokono
    • F04B126
    • F04B27/1804F04B2027/185F04B2027/1854
    • A variable displacement compressor has a control valve for controlling the displacement of the compressor. When the pressure in a discharge chamber of the compressor (discharge pressure) is equal to or higher than a first threshold value, a controller executes a limiting control for limiting the discharge pressure. During the limiting control, the controller gradually decreases a duty ratio, which is sent to the control valve, such that the displacement of the compressor is gradually decreased. When the duty ratio is decreased to a reference duty ratio, the controller sets the duty ratio to zero %. As a result, the compressor displacement is minimized and the discharge pressure is lowered. Therefore, the pipes of an external refrigerant circuit does not receive excessive load based on high discharge pressure.
    • 可变排量压缩机具有用于控制压缩机的排量的控制阀。 当压缩机的排出室中的压力(排出压力)等于或高于第一阈值时,控制器执行用于限制排出压力的限制控制。 在限制控制期间,控制器逐渐减小发送到控制阀的占空比,使得压缩机的位移逐渐减小。 当占空比降低到参考占空比时,控制器将占空比设置为零%。 结果,压缩机排量被最小化并且排出压力降低。 因此,外部制冷剂回路的管道基于高排出压力不会受到过大的负荷。
    • 7. 发明申请
    • Variable displacement compressor
    • 可变排量压缩机
    • US20080166245A1
    • 2008-07-10
    • US12001512
    • 2007-12-11
    • Tetsuhiko FukanumaHiroaki Kayukawa
    • Tetsuhiko FukanumaHiroaki Kayukawa
    • F04B49/03
    • F04B27/109F04B27/1009F04B27/1804F04B39/10F04B39/123
    • A variable displacement compressor is disclosed that draws refrigerant from a suction pressure zone and discharges the refrigerant to a discharge pressure zone, and controls displacement according to a pressure in a control pressure chamber. The compressor has a cam body, pistons, a supply passage, a release passage, and an on-off valve. The inclination angle of the cam body is changeable based on the pressure in the control pressure chamber. A piston reciprocates in each cylinder bore as the cam body rotates. The supply passage supplies the refrigerant in the discharge pressure zone to the control pressure chamber. The release passage releases the refrigerant in the control pressure chamber to the suction pressure zone. The on-off valve selectively opens and closes the release passage in response to changes of the temperature. The on-off valve shuts off the release passage when the temperature is equal to or higher than a predetermined temperature.
    • 公开了一种可变排量压缩机,其从吸入压力区抽取制冷剂,并将制冷剂排出到排出压力区域,并且根据控制压力室中的压力来控制排量。 压缩机具有凸轮体,活塞,供给通道,释放通道和开闭阀。 凸轮体的倾斜角度可以基于控制压力室中的压力而变化。 当凸轮体旋转时,活塞在每个气缸孔中往复运动。 供给通道将排出压力区域中的制冷剂供应到控制压力室。 释放通道将控制压力室中的制冷剂释放到吸入压力区。 开关阀响应于温度的变化选择性地打开和关闭释放通道。 当温度等于或高于预定温度时,开关阀关闭释放通道。