Refrigeration and defrost control system

Details Refrigeration and defrost control system Refrigeration and defrost control system

2005-03-30

2008-11-25

Tyler, Cheryl J. (Department: 3744)

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

C062S150000, C062S151000, C062S153000, C062S154000, C062S080000, C062S275000, C062S234000

Reexamination Certificate

active

07454918

ABSTRACT:
A system and method for refrigeration timer control having an energy efficient defrost cycle are provided. The system and method provide a delay time after the refrigeration cycle and prior to the defrost cycle. During this delay period the evaporator fan may run. The fan circulation and the heat from the fan coil provide a pre-warm cycle to the evaporator prior to the defrost cycle. To further enhance energy efficiency, the system and method may also provide a pre-refrigeration cycle after the defrost cycle. During this pre-refrigeration cycle only the compressor is energized. This prevents warm moist air from being circulated until the evaporator coils are cooled.

REFERENCES:
patent: 2736173 (1956-02-01), Duncan
patent: 2940277 (1960-06-01), Pas et al.
patent: 3914951 (1975-10-01), Heidorn
patent: 3924416 (1975-12-01), Durdin
patent: 4392357 (1983-07-01), Kinsey et al.
patent: 2003/0182951 (2003-10-01), Rafalovich et al.

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