Short reverse rotation of compressor at startup

Details Short reverse rotation of compressor at startup Short reverse rotation of compressor at startup

2007-11-06

2007-11-06

Rodriguez, William H. (Department: 3746)

Pumps

Processes

C417S325000, C417S326000

Reexamination Certificate

active

10443212

ABSTRACT:
In a method of operating a scroll or screw compressor at startup, the compressor is rotated in reverse for a brief period of time. The compressor is of a type that does not compress liquid when rotated in reverse. The purpose is to boil off the liquid refrigerant from the oil by heating and agitating the mixture of oil and refrigerant in the oil sump. This results in much more benign forward start as no refrigerant is drawn into the scroll compressor pump and the amount of oil pumped out of the compressor on start up is minimized. Also, the viscosity of oil is increased and lubrication of the bearings is improved. After a short period of time reverse rotation is stopped and the compressor can begin to be driven in the forward direction.

REFERENCES:
patent: 2106685 (1938-01-01), Smith
patent: 2976807 (1961-03-01), Hill
patent: 3339829 (1967-09-01), Connor
patent: 4382370 (1983-05-01), Suefuji et al.
patent: 4905478 (1990-03-01), Matsuda et al.
patent: 5076067 (1991-12-01), Prenger et al.
patent: 5310326 (1994-05-01), Gui et al.
patent: 5395214 (1995-03-01), Kawahara et al.
patent: 5820349 (1998-10-01), Caillat
patent: 6210119 (2001-04-01), Lifson et al.
patent: 6264445 (2001-07-01), Beck et al.
patent: 6280146 (2001-08-01), Bush et al.
patent: 6478556 (2002-11-01), Choi et al.
patent: 6648607 (2003-11-01), Milliff et al.
patent: 2002/0150490 (2002-10-01), Bush et al.
patent: 2003/0077193 (2003-04-01), Skinner
patent: 2004/0022658 (2004-02-01), Narasipura et al.
patent: 2004/0161345 (2004-08-01), Choi et al.
patent: 2004/0208766 (2004-10-01), Jeong
Hicks et al. Pump Application Engineering, 1971, McGraw-Hill, Inc., pp. 31-38.

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