US 9,810,468 B2
Compressor crankcase heating control systems and methods
George J. Ramayya, Sidney, OH (US)
Assigned to Emerson Climate Technologies, Inc., Sidney, OH (US)
Filed by Emerson Climate Technologies, Inc., Sidney, OH (US)
Filed on May 27, 2016, as Appl. No. 15/167,227.
Application 15/167,227 is a continuation of application No. 14/461,796, filed on Aug. 18, 2014, granted, now 9,353,738.
Claims priority of provisional application 61/879,875, filed on Sep. 19, 2013.
Prior Publication US 2016/0273818 A1, Sep. 22, 2016
This patent is subject to a terminal disclaimer.
Int. Cl. F04B 49/10 (2006.01); F25B 49/02 (2006.01); F04B 39/02 (2006.01); F25B 31/00 (2006.01); F04B 39/06 (2006.01); F04B 49/06 (2006.01); F04B 35/04 (2006.01); F04B 39/12 (2006.01); F04C 18/02 (2006.01); F04C 29/00 (2006.01); F04C 29/04 (2006.01); F25B 13/00 (2006.01); F25B 31/02 (2006.01)
CPC F25B 49/025 (2013.01) [F04B 35/04 (2013.01); F04B 39/02 (2013.01); F04B 39/0207 (2013.01); F04B 39/06 (2013.01); F04B 39/128 (2013.01); F04B 49/06 (2013.01); F04C 18/0215 (2013.01); F04C 29/005 (2013.01); F04C 29/0085 (2013.01); F04C 29/04 (2013.01); F25B 13/00 (2013.01); F25B 31/002 (2013.01); F25B 31/023 (2013.01); F25B 31/026 (2013.01); F04C 2240/30 (2013.01); F25B 2400/01 (2013.01); F25B 2600/02 (2013.01); F25B 2600/021 (2013.01); F25B 2600/111 (2013.01); F25B 2700/2106 (2013.01); F25B 2700/21152 (2013.01); Y02B 30/741 (2013.01); Y02B 30/743 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A compressor crankcase heating control method for a heat pump system, the compressor crankcase heating control method comprising:
selectively actuating a first switching device to connect and disconnect first and second power lines to and from second and third switching devices, respectively,
the first and second power lines configured to receive a first voltage; and
when the first and second power lines are disconnected from the second and third switching devices via the first switching device, actuating the second and third switching devices thereby connecting third and fourth power lines to ends, respectively, of at least one winding of a stator of an electric motor of a compressor,
the at least one winding of the stator of the electric motor configured to heat the crankcase of the compressor, and
the third and fourth power lines configured to receive a second voltage that is less than the first voltage.