Refrigeration system with hot gas defrost

Details Refrigeration system with hot gas defrost Refrigeration system with hot gas defrost

1977-03-04

1978-06-20

King, Lloyd L.

Refrigeration

With means preventing or handling atmospheric condensate...

Means utilizing heat developed by refrigeration producer

F25B 4700

Patent

active

040954382

ABSTRACT:
A refrigeration system having compressor and condenser adapted for operation in ambients above approximately 45.degree. F (7.degree. C) and including a frosting evaporator. The evaporator is defrosted by hot gas which flows through the compressor discharge, the condenser, the receiver, the liquid line and a valve-controlled hot gas branch connected between the liquid line and the hot gas inlet of the evaporator. During defrost, a control stops the evaporator and condenser fan motor and opens the valve in the hot gas branch conduit. At defrost's end, the control causes the evaporator and condenser fan motor to operate and the hot gas valve to close so that liquid refrigerant flows from the condenser outlet through the receiver and liquid line to the expansion device which feeds the evaporator for refrigeration in the normal course.

REFERENCES:
patent: 3071935 (1963-01-01), Kapeker
patent: 3427819 (1969-02-01), Seghetti
patent: 3677025 (1972-07-01), Payne
patent: 3822562 (1974-07-01), Crosby
patent: 3839879 (1974-10-01), Redfern et al.

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