OIL RETURN ALGORITHM FOR CAPACITY MODULATED COMPRESSOR
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United States of America Patent
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Issued Date -
Mar 4, 2010
app pub date -
Sep 3, 2008
filing date -
Sep 3, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A control for a compressor motor is programmed to operate the motor at at least one low capacity and at least one higher capacity. The control is operable to estimate an amount of oil which will have migrated from said compressor shell, at least when the compressor is operating at the lower capacity rate. The motor control moves the compressor motor from the lower capacity to at least one higher capacity once the estimated quantity of oil exceeds a predetermined limit. The capacity may be related to space.
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