Scroll machine with asymmetrical bleed hole
AssigneeCopeland Corporation
InventorMark Bass
Life of this patent
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Abstract
A scroll compressor has a pair of scroll members which compress a fluid as the fluid moves through pockets created by the scroll members. The fluid moves from a suction pressure zone to a discharge pressure zone. A chamber is defined by one of the scroll members. The chamber is in communication with a pocket located between the suction and discharge pressure zone such that an intermediate pressurized fluid is supplied to the chamber through a fluid passageway. The fluid passageway is designed to allow a large flow from the pocket to the chamber and a small flow from the chamber to the pocket. This dual flow capability reduces the pressure pulsation in the chamber. In one embodiment, a capacity control mechanism is associated with the compressor to vary the capacity of the compressor.
Claims21
A scroll machine comprising:
- a first scroll member having a first spiral wrap projecting outwardly from a first end plate;
- a second scroll member having a second spiral wrap projecting outwardly from a second end plate;
- a drive member 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 at a suction pressure and a discharge pressure zone at a discharge pressure;
- means defining a leakage path disposed between two elements of said scroll machine, said leakage path extending from said discharge pressure zone to said suction pressure zone;
- means defining a chamber containing an intermediate pressurized fluid said intermediate pressurized fluid being at a pressure between said suction pressure and said discharge pressure, said chamber being in communication with one of said two elements of said scroll machine to bias said one element into engagement with the other of said two elements to close said leakage path;
- a fluid passageway extending between one of said pockets of progressively changing volume and said chamber;
- and
- means disposed within said fluid passageway for providing a first fluid flow level from said chamber to said one pocket for said intermediate pressurized fluid and a second fluid flow level from said one pocket to said chamber for said intermediate pressurized fluid, said second fluid flow level being greater than said first fluid flow level.
Dependencies are inferred from the claim text.