Refrigeration – Automatic control – Preventing – removing or handling atmospheric condensate
Patent
1994-07-01
1996-04-16
Tanner, Harry B.
Refrigeration
Automatic control
Preventing, removing or handling atmospheric condensate
62 81, 62151, F25D 2106
Patent
active
055071546
ABSTRACT:
A self-calibrating defrost controller for use with heat pump. The outdoor heat exchanger coil of a heat pump is defrosted based upon either compressor run-time exceeding 6 hours, or the temperature difference between the coil and ambient air exceeding a value that changes depending upon outdoor coil temperature. A programmable controller mounted to a printed circuit board within a housing executes a control program to monitor temperature sensor produced temperature signals. One sensor that monitors ambient temperature is mounted to the printed circuit board that also supports the programmable controller.
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Ranco Incorporated of Delaware
Tanner Harry B.
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