发明授权
- 专利标题: Variable displacement type compressor with displacement control mechanism
- 专利标题(中): 具有位移控制机构的可变排量式压缩机
-
申请号: US12429439申请日: 2009-04-24
-
公开(公告)号: US08292596B2公开(公告)日: 2012-10-23
- 发明人: Masaki Ota , Masahiro Kawaguchi , Hideharu Yamashita , Hiroshi Kubo , Ryo Matsubara
- 申请人: Masaki Ota , Masahiro Kawaguchi , Hideharu Yamashita , Hiroshi Kubo , Ryo Matsubara
- 申请人地址: JP Aichi-Ken
- 专利权人: Kabushiki Kaisha Toyota Jidoshokki
- 当前专利权人: Kabushiki Kaisha Toyota Jidoshokki
- 当前专利权人地址: JP Aichi-Ken
- 代理机构: Locke Lord LLP
- 优先权: JPP2008-117385 20080428
- 主分类号: F04B1/26
- IPC分类号: F04B1/26
摘要:
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.