Scroll compressor discharge valve
AssigneeCopeland Corporation
InventorKoman B. Nambiar
Life of this patent
Estimating the term…
Abstract
A scroll type hermetic compressor is disclosed which incorporates an improved disc type check valve in the discharge conduit exiting from the compressor shell. The check valve operates to prevent return of high pressure refrigerant which may cause reverse movement of the orbiting scroll upon shut down of the compressor.
Claims16
In a hermetic refrigeration compressor having an outer shell, compressor means within said shell for compressing a fluid and a discharge flowpath for discharging said compressed fluid from said hermetic compressor, a discharge check valve assembly in said discharge flowpath for resisting backflow of said compressed fluid, said valve assembly comprising a housing having a bore therein opening out one end thereof, means defining a valve seat, said housing having an annular shoulder adjacent said one end and said valve seat being fitted within said one end of said housing and retained against said shoulder by a flange portion of said housing folded into overlying relationship with said valve seat means, a stop surface supported by said housing in spaced relationship to said valve seat and a substantially planar valve member freely movable within said housing between said valve seat and said stop surface in response to a pressure differential thereacross to define closed and open positions respectively whereby backflow of said compressed fluid into said compressor is effectively resisted.
A scroll type refrigeration compressor comprising:
- an outer shell;
- compressor means disposed in said shell, said compressor means including first and second interleaved scroll members supported for relative orbital movement therebetween so as to define moving fluid pockets of changing volume;
- motor means disposed within said shell and operatively connected to drive said compressor means;
- a discharge muffler within said shell;
- discharge passage means for conducting compressed fluid from said compressor means to said discharge muffler;
- and
- valve means disposed within a discharge opening in the outer shell, said valve means including a housing having a bore therein, means defining a valve seat secured within one end of said housing and having a fluid passage therethrough, a generally planar valve member movable within said bore defined by said housing and having a fluid passage therethrough, said valve member being freely movable in response to a pressure differential there across between a first open position wherein fluid flows from said discharge muffler through said discharge opening and a second closed position whereby fluid flow through said discharge opening into said discharge muffler is prevented, a discharge tube telescopically received within the other end of said housing, and means in said core defining a stop surface for limiting movement of said valve member in the open position, said bore having uniform dimensions between said valve seat and said stop surface for maintaining alignment of said valve member during movement thereof.
Dependencies are inferred from the claim text.