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US 7,547,195 B2Granted
Scroll compressor with high side to low side oil bleed valve
AssigneeScroll Technologies
InventorsHarshal Upadhye, Gregory W. Hahn
Life of this patent
Estimating the term…
Abstract
A scroll compressor is provided with an oil bleed valve that selectively communicates a discharge pressure chamber to a suction pressure chamber. The oil bleed valve controls flow of hot oil through a passage and onto a safety shutoff switch for an electric motor.
Claims5
A scroll compressor comprising:
- a sealed housing shell;
- an electric motor received within said sealed housing shell, said electric motor driving a shaft, said shaft causing an orbiting scroll member to orbit, said orbiting scroll member having a spiral wrap interfitting with a spiral wrap on a non-orbiting scroll member to define compression chambers to compress an entrapped refrigerant, said non-orbiting scroll member being received said housing shell in a sealed manner, and defines a suction pressure chamber on one side of said non-orbiting scroll and a discharge pressure chamber on an opposed side, with said orbiting scroll and said motor received within said suction pressure chamber, a check valve upstream of said discharge pressure chamber, and said check valve being downstream of said compression chambers;
- and
- an oil bleed valve for selectively opening a passage through said non-orbiting scroll and communicating said discharge pressure chamber to said suction pressure chamber, said oil bleed valve including a component which moves between an open and closed position when a temperature passes a predetermined limit, and said passage allowing hot oil to move downwardly onto a safety switch for said electric motor to stop operation of said electric motor when said oil bleed valve is opened.
1 more element
Dependencies are inferred from the claim text.