Patent ID: 6575710
Filing Date: 2003-06-10
Classification: F04B

Abstract:
A compressor having an inlet and an outlet, said compressor comprising:a cylinder bank defining a compression cylinder; a suction chamber in communication with said compression cylinder and with said inlet; a discharge chamber in communication with said compression cylinder and with said outlet; a capacity control system associated with said cylinder bank, said capacity control system comprising: a valve body disposed between said inlet and said suction chamber, said valve body being movable between a first position where said inlet is in communication with said suction chamber and a second position where said inlet is prohibited from communicating with said suction chamber; a control chamber disposed adjacent said valve body, pressurized fluid within said control chamber reacting against said valve body to move said valve body between said first and second positions; a first valve disposed between said suction chamber and said control chamber, said first valve being open when said valve body is in said first position; a second valve disposed between said discharge chamber and said valve body, said second valve being open when said valve body is in said second position; and an orifice disposed between said discharge chamber and said control chamber, said orifice limiting the flow of fluid between said discharge chamber and said control chamber to limit velocity of said valve body; wherein said capacity control system further comprises a cylinder head, a valve block and a gasket; said cylinder head being secured to said cylinder bank and defining said control chamber, said valve block being secured to said cylinder head, said gasket being disposed between said cylinder head and said valve block, said orifice being defined by said gasket.