Invention Grant
- Patent Title: Method and apparatus for pressure equalization in rotary compressors
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Application No.: US17016891Application Date: 2020-09-10
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Publication No.: US11460027B2Publication Date: 2022-10-04
- Inventor: Brandon Ullrich , Wei Wang
- Applicant: Lennox Industries Inc.
- Applicant Address: US TX Richardson
- Assignee: Lennox Industries Inc.
- Current Assignee: Lennox Industries Inc.
- Current Assignee Address: US TX Richardson
- Agency: Shackelford, Bowen, McKinley & Norton, LLP
- Main IPC: F04C28/06
- IPC: F04C28/06 ; F04D27/02 ; F04C28/28 ; F04C28/24 ; F04C29/00 ; F04D25/06 ; F25B49/02 ; F04B49/06 ; F25B31/02 ; F25B49/00 ; F25B41/20 ; F04C23/00

Abstract:
A rotary compressor system includes a compressor housing that includes a compressor motor that draws in fluid from a suction side. The fluid is compressed within a compression chamber and discharged through a discharge side. The compression chamber is disposed between the suction side and the discharge side. An overload-protection switch is electrically coupled in series with the compressor motor and is adapted to cut power to the compressor motor responsive to an overload event. A solenoid valve is fluidly coupled between the compression chamber and a location upstream of the suction side and is electrically coupled in series with the overload-protection switch. An interruption of electrical current to the compressor motor also interrupts electrical current to the solenoid valve, which opens the solenoid valve to equalize pressure between the suction side and the discharge side.
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