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US 5,591,014 AGranted
Scroll machine with reverse rotation protection
AssigneeCopeland Corporation
InventorsFrank S. Wallis, Jean-Luc Caillat, Francis M. Simpson, Gary J. Anderson, Donald W. Rode, Norman G. Beck
Life of this patent
Estimating the term…
Abstract
A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to the cavity and the leakage path is open when the cavity is open to the suction zone of the compressor. A valve which can be mechanical or electrical is used to open and close a passageway extending between the cavity and the suction zone of the machine.
Claims68
A scroll machine comprising:
- a first scroll member having a first spiral wrap projecting outwardly from an end plate;
- a second scroll member having a second spiral wrap projecting outwardly from an end plate, said second spiral wrap intermeshed with said first spiral wrap, one of said scroll members being mounted for limited axial movement with respect to the other scroll member, said one scroll member being biased toward said other scroll member by a pressurized fluid;
- 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 scroll machine including a leakage path disposed between two components of said scroll machine, said leakage path extending between said discharge pressure zone and said suction pressure zone, said leakage path being closed due to the influence of said pressurized fluid biasing said two components together;
- a valve member for releasing said pressurized fluid to said suction pressure zone of said scroll machine whereby said leakage path between said discharge pressure zone and said suction pressure zone is opened.
1 more element
A scroll machine comprising:
- a first scroll member having a first spiral wrap projecting outwardly from an end plate;
- a 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 including an electric motor 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 scroll member including a leakage path disposed between two components of said scroll machine, said leakage path extending between said discharge pressure zone and said suction pressure zone, said leakage path being lost due to the influence of a pressurized fluid biasing said two components together;
- and
- a solenoid valve member wired in series with said electric motor for releasing said pressurized fluid to said suction pressure zone of said scroll machine whereby said leakage path between said discharge pressure zone and said suction pressure zone is opened.
2 more elements
A scroll machine comprising:
- a first scroll member having a first spiral wrap projecting outwardly from an end plate;
- a second scroll member having a second spiral wrap projecting outwardly from an end plate, said wraps being intermeshed with one another, one of said scroll members being mounted for limited axial movement with respect to the other scroll member, said one scroll being biased towards said other scroll by a pressurized fluid, said pressurized fluid being disposed within a cavity exposed to a surface of said one of said scroll members;
- 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 scroll machine including a fluid leakage path disposed between two components of said scroll machine, said leakage path extending between said discharge pressure zone and said suction pressure zone, said fluid leakage path being closed when said pressurized fluid is supplied to said cavity;
- a valve member including a fluid passageway between said cavity and said suction pressure zone for releasing said pressurized fluid from said cavity to said suction pressure zone.
1 more element
Dependencies are inferred from the claim text.