Valve assembly and compressor modulation apparatus

Details Valve assembly and compressor modulation apparatus Valve assembly and compressor modulation apparatus

F - Mech Eng,Light,Heat,Weapons

16

K

230/86

F16K 15/06 (2006.01) F04B 39/10 (2006.01) F04B 49/16 (2006.01)

Patent

CA 1295306

ABSTRACT OF THE DISCLOSURE A method and several embodiments of apparatus are disclosed for modulating the capacity of a gas compressor. A discharge valve member is formed with an opening therein and fluid communication between the compression chamber and a clearance pocket is selectively established by a slidable plunger element. In a first position, the plunger fills the opening in the discharge valve member to close fluid communication between the clearance pocket and the compression chamber. In a second position, the plunger element moves away from the valve member to establish fluid communication between the compression chamber and the clearance pocket, wherein the reexpansion volume is increased and the capacity of the compressor reduced. In the preferred embodiment, an apertured neck member is provided. The valve member is slidably guided by outer walls of the neck member, and the plunger has a stem designed to slidingly fit within the neck aperture. Also, several embodiments of an improved valve assembly are disclosed which can be employed in a gas compressor with or without a capacity modulation system.

478945

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