- Patent Title: Crankcase heater systems and methods for variable speed compressors
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Application No.: US14286132Application Date: 2014-05-23
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Publication No.: US09810218B2Publication Date: 2017-11-07
- Inventor: Daniel L. McSweeney , Charles E. Green , Stephen M. Seibel
- Applicant: Emerson Climate Technologies, Inc.
- Applicant Address: US OH Sidney
- Assignee: Emerson Climate Technologies
- Current Assignee: Emerson Climate Technologies
- Current Assignee Address: US OH Sidney
- Agency: Harness, Dickey & Pierce, P.L.C.
- Main IPC: F25B49/02
- IPC: F25B49/02 ; F04C29/04 ; F04B39/06 ; F04C28/28 ; F04B35/04 ; F04C18/02
Abstract:
A system includes a compressor having a shell housing a compression mechanism driven by an electric motor in an on state and not driven by the electric motor in an off state. The system also includes a variable frequency drive that drives the electric motor in the on state by varying a frequency of a voltage delivered to the electric motor and that supplies electric current to a stator of the electric motor in the off state to heat the compressor.
Public/Granted literature
- US20140255209A1 CRANKCASE HEATER SYSTEMS AND METHODS FOR VARIABLE SPEED COMPRESSORS Public/Granted day:2014-09-11
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