F - Mech Eng,Light,Heat,Weapons – 25 – D
Patent
F - Mech Eng,Light,Heat,Weapons
25
D
341/4
F25D 21/06 (2006.01) F25D 21/00 (2006.01)
Patent
CA 1260109
Adaptive Defrost Control for a Refrigerator Abstract An adaptive defrost control for a refrigeration device alternately operated in cooling and defrosting cycles includes means for detecting the rate of change of temperature of an evaporator of the refrigeration device during a defrosting cycle, means for determining the length of time the rate of change of evaporator tempera- ture remains at suhstantially zero and means for estab- lishing the duration of a subsequent cooling cycle in dependence upon the determined length of time. The de- termined length of time is indicative of the magnitude of the frost load that formed on the evaporator and the length of the next cooling cycle is adjusted in accor- dance therewith so that the magnitude of the frost load built up on the evaporator in subsequent cooling cycles is forced toward a value which increases the efficiency of the refrigeration device.
525442
Janke Donald E.
Linstromberg William J.
Corporation Whirlpool
Kirby Eades Gale Baker
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