Patent ID: 6217293
Filing Date: 2001-04-17
Classification: F04B

Abstract:
A variable displacement compressor that varies the displacement in accordance with the inclination angle of a drive plate located in a crank chamber, the compressor comprising:a piston connected to the drive plate, wherein the piston is reciprocated by movement of the drive plate;an adjusting mechanism for adjusting the pressure in the crank chamber, the mechanism including a control passage connected to the crank chamber for permitting passage of a fluid and a control valve located in the control passage for selectively opening and closing the control passage, wherein the inclination of the drive plate is varied in accordance with pressure in the crank chamber and the piston stroke varies in accordance with the drive plate inclination to vary the displacement;a cylinder block having a cylinder bore for accommodating the piston;a housing member joined to the cylinder block, the housing member including a suction chamber and a discharge chamber; anda valve plate located between the cylinder block and the housing member, wherein the piston draws fluid from the suction chamber to the cylinder bore through the valve plate and discharges the fluid to the discharge chamber through the valve plate, the valve plate defining a through hole, which forms part of the control passage and functions as a fixed restrictor to limit the flow rate of the fluid in the control passage.