High-speed defrost refrigeration system

Details High-speed defrost refrigeration system High-speed defrost refrigeration system

2005-02-14

2009-11-03

Norman, Marc E (Department: 3744)

Refrigeration

Automatic control

Preventing, removing or handling atmospheric condensate

C062S081000, C062S196100, C062S197000

Reexamination Certificate

active

07610766

ABSTRACT:
A defrost refrigeration system of the type having a main refrigeration circuit operating a refrigeration cycle. The defrost refrigeration system comprises a first line extending from the first compressor to the evaporator stage and is adapted to receive a portion of discharged low-pressure refrigerant from the first compressor. Valves are provided for stopping a suction of cooling refrigerant in an evaporator of the evaporator stage and for directing a flow of defrost refrigerant to release heat to defrost the evaporator. A second line is provided for directing the refrigerant having released heat to the expansion stage of the refrigeration cycle. A pressure reducing device is optionally positioned downstream of the condensing stage for adjusting a pressure of the refrigerant in the high-pressure liquid state mixing with the defrost refrigerant having released heat.

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