F - Mech Eng,Light,Heat,Weapons – 25 – B
Patent
F - Mech Eng,Light,Heat,Weapons
25
B
F25B 49/00 (2006.01) F25B 47/02 (2006.01) F25D 21/00 (2006.01) F25D 21/08 (2006.01) H01H 47/00 (2006.01) H01H 47/22 (2006.01) H01H 3/00 (2006.01) H01H 47/04 (2006.01) H01H 47/10 (2006.01)
Patent
CA 2106555
A defrost controller for a refrigerator/freezer including one or more of the following features: (1) a timer module that can serve as a real time, cumulative time or variable time defrost timer; (2) an algorithm to control defrosting in view of frequent power outages; (3) a power up defrost cycle; (4) a default reaction to loss of compressor run information; (5) a simple manufacturing test initiator; (6) a test initialization via thermostat actuation; (7) a relay power supply which supplies two different energization voltages; (8) a relay energization signal which decays rapidly from a voltage in excess of the relay rated voltage to a voltage within the relay rated voltage; and (9) respective relay energization sequence to overcome light contact welding.
Bradley Greg A.
Carnal Randall L.
Guess Ronald W.
Janke Donald E.
Szynal Joseph M.
Corporation Whirlpool
Kirby Eades Gale Baker
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