Scroll machine with discharge valve
AssigneeCopeland Corporation
InventorMichael M. Perevozchikov
Life of this patent
Estimating the term…
Abstract
A compressor includes a normally open discharge valve assembly for controlling compressed refrigerant flow from the discharge chamber through the compression members. This controlling of flow results in an increased performance for the compressor by reducing recompression volume and the elimination of reverse rotation at shut down. The discharge valve assembly includes a valve seat, a valve plate and a valve stop secured within a recess formed within the compressor. The valve stop and the valve seat include a contoured surface which is engaged by the valve plate when it opens and closes. The contoured surface control the movement of the valve plate.
Claims30
A scroll machine comprising:
- a shell defining a discharge chamber;
- a first scroll member disposed in said shell, said first member having a first spiral wrap projecting outwardly from an end plate;
- a second scroll member disposed in said shell, said second scroll member having a second spiral wrap projecting outwardly from an end plate, said second spiral wrap intermeshed with said first spiral wrap;
- a drive member for causing said scroll members to orbit relative to one another whereby said spiral wraps will create pockets of progressively changing volume between a suction pressure zone and a discharge pressure zone, said discharge pressure zone being in fluid communication with said discharge chamber;
- a discharge valve disposed between said discharge pressure zone and said discharge chamber, said discharge valve movable between an open position where fluid flow between said discharge pressure zone and said discharge chamber is permitted and a closed position where fluid flow between said discharge chamber and said discharge pressure zone is prohibited, said discharge valve comprising:
- a valve seat disposed within a recess defined by one of said first and second scroll members;
- a valve plate disposed within said recess adjacent said valve seat, said valve plate including a movable portion being movable between a position adjacent said valve seat to place said discharge valve in said closed position and a position spaced from said valve seat to place said discharge valve in said open position;
- and
- a valve stop disposed within said recess adjacent said valve plate, said valve stop defining a contoured surface for controlling said movement of said movable portion of said valve plate.
A rotary compressor comprising:
- a shell defining a discharge chamber;
- a housing disposed within said shell, said housing defining a chamber;
- a roller disposed within said chamber;
- a vane disposed between said housing and said roller, said vane dividing said chamber into a suction area and a discharge area, said discharge area being in fluid communication with said discharge chamber;
- a drive member for causing said roller to rotate within said chamber whereby fluid in said suction area progressively changes volume as it is moved into said discharge area;
- a discharge valve disposed between said discharge area and said discharge chamber, said discharge valve movable between an open position where fluid flow between said discharge area and said discharge chamber is permitted and a closed position where fluid flow between said discharge chamber and said discharge area is prohibited, said discharge valve comprising:
- a valve seat disposed within a recess defined by said housing;
- a valve plate disposed within said recess adjacent said valve seat, said valve plate defining a movable portion being movable between a position adjacent said valve seat to place said discharge valve in said closed position and a position spaced from said valve seat to place said discharge valve in said open position;
- and
- a valve stop disposed within said recess adjacent said valve plate, said valve stop defining a contoured surface for controlling said movement of said movable portion of said valve plate.
Dependencies are inferred from the claim text.