Gas defrost system including heat exchange

Details Gas defrost system including heat exchange Gas defrost system including heat exchange

1978-10-18

1981-07-07

King, Lloyd L.

Refrigeration

Automatic control

Refrigeration producer

62 81, 62278, 62513, F25B 4100, F25B 4700

Patent

active

042767555

ABSTRACT:
A gas defrost system comprising a heat exchange assembly located in close physical proximity with a branch conduit from the compressor discharge; the branch conduit leads, through a gas manifold, to the several remote evaporators comprising the refrigeration system. Liquid refrigerant is supplied to the heat exchanger from the liquid manifold and evaporated refrigerant is returned from the heat exchanger to the suction manifold. Refrigerant flow through the heat exchanger is controlled by an externally equalized expansion valve which has sensors connected to measure the compressor discharge pressure and the defrost gas temperature downstream of the heat exchange section. The expansion valve can be preset to maintain a desired amount of heat exchange so that the temperature of the defrost gas in the manifold will be maintained at or above a predetermined lower limit.

REFERENCES:
patent: 3645109 (1972-02-01), Quick

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