COOLING UNIT WITH MULTI-PARAMETER DEFROST CONTROL
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United States of America Patent
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Issued Date -
Apr 24, 2008
app pub date -
Mar 5, 2007
filing date -
Oct 20, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A cooling unit apparatus and method for controlling a defrost cycle using a multi-parameter defrost control system. The unit includes a refrigeration assembly with a compressor and an evaporator, a defrost temperature sensor that senses a temperature related to the defrost cycle, a controller configured to control a defrost cycle based on an elapsed defrost time and the defrost temperature. The controller is programmed with a defrost set point and a maximum defrost time. The controller ends the defrost cycle when the elapsed defrost time is greater than the maximum defrost time or when the defrost temperature is greater than the defrost set point, whichever occurs first.
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