Reduced energy refrigerator defrost method and apparatus

F - Mech Eng,Light,Heat,Weapons – 25 – D

Patent

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F25D 21/06 (2006.01) F25D 21/00 (2006.01) F25D 21/08 (2006.01)

Patent

CA 2409732

An apparatus and method for defrosting an evaporator of a refrigeration sealed system is described. The system includes a controller operatively coupled to an evaporator fan, a condenser fan and a defrost heater, and the method includes operating the sealed system until a selected time till defrost interval expires, initiating a defrost cycle when the time till defrost interval expires, and selectively operating the sealed system to raise a temperature of the evaporator while the defrost heater is inactivated.

La présente description porte sur un appareillage et une méthode de dégivrage d'un évaporateur de système de réfrigération scellé. Ce système comprend un contrôleur accouplé dynamiquement à un ventilateur d'évaporateur, un ventilateur de condenseur et un dégivreur. La méthode comprend le fonctionnement du système scellé pendant une durée choisie, jusqu'à ce que l'étape du dégivrage prenne fin, ce qui déclenche un cycle de dégivrage lorsque l'étape du dégivrage prend fin, et fait fonctionner sélectivement le système scellé pour augmenter la température de l`évaporateur, pendant que le dégivreur est inactif.

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