High-speed evaporator defrost system

Details High-speed evaporator defrost system High-speed evaporator defrost system

1999-02-26

2000-07-18

Tanner, Harry B.

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

62174, 62278, F25D 2106

Patent

active

060890339

ABSTRACT:
A high-speed evaporator defrost system is comprised of a defrost conduit circuit connected to the discharge line of one or more compressors and back to the suction header through an auxiliary reservoir capable of storing the entire refrigerant load of the refrigeration system. Auxiliary reservoir is at low pressure and is automatically flushed into the main reservoir when liquid refrigerant accumulates to a predetermined level. The auxiliary reservoir of the defrost circuit creates a pressure differential across the refrigeration coil of the evaporators sufficient to accelerate the hot high pressure refrigerant gas in the discharge line through the refrigeration coil of the evaporator to quickly defrost the refrigeration coil even at low compressor head pressures and wherein the pressure differential across the coil is in the range of from about 30 p.s.i. to 200 p.s.i.

REFERENCES:
patent: 2978877 (1961-04-01), Long
patent: 3353367 (1967-11-01), Garland et al.
patent: 3988904 (1976-11-01), Ross
patent: 4059968 (1977-11-01), Ross
patent: 4979371 (1990-12-01), Larson

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