Patent ID: 6719544
Filing Date: 2004-04-13
Classification: F04C,Y10T

Abstract:
A valve for a scroll compressor comprising:a low pressure compartment; a high pressure compartment; a compression stage having an outlet, said low and high pressure compartments being separated by said compression stage; a delivery valve coupled to said outlet and movable between an open position, and a closed position wherein gas is prevented from passing from the high pressure compartment to the compression stage; a central profiled body extending into an opening in the compression stage for allowing gas to escape therefrom, the central profiled body comprising an outer, concave, axisymmetric surface, the axisymmetric surface being generally toroidal and terminating in a tip; the outlet of the compression stage being delimited by a curved surface forming a widened portion in a downstream direction; the widened portion and the central profiled body cooperating to define a substantially constant cross-sectional area for the passage of gas; and closing means for sealing the cross-sectional area when the valve is in the closed position.