Refrigerant gas heater system for display cabinets

Refrigeration – Display type – Means removing or preventing condensate on transparent panel

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62117, 62278, A47F 304, F25B 4700

Patent

active

043898564

ABSTRACT:
A low temperature refrigerant gas heater system for warming structural parts of refrigerated display cabinets sufficiently to prevent the formation of moisture condensate. A desuperheating means is provided for an auxiliary gas flow line taken off from a primary refrigeration circuit in order to lower the temperature of a portion of the refrigerant gas flow to within the range of about 80.degree. F. to 130.degree. F. for this purpose. The auxiliary gas have pressure-temperature-enthalpy conditions located in the superheated region or the saturation envelope area of a pressure-enthalpy diagram within these temperature limits. The use of low temperature refrigerant gas in the auxiliary flow line avoids heater line warping and buckling and customer inconvenience and discomfort problems which are incurred by use of high temperature compressor refrigerant gas.

REFERENCES:
patent: 2420240 (1947-05-01), Haggerty
patent: 3010288 (1961-11-01), Jacobs
patent: 3125864 (1964-03-01), Ural
patent: 3157306 (1964-11-01), Courson
patent: 3167931 (1965-02-01), Bryson
patent: 3451226 (1969-06-01), Shriver
patent: 4024728 (1977-05-01), Gustafsson
patent: 4141222 (1979-02-01), Ritchie
patent: 4197718 (1980-04-01), Abraham et al.
patent: 4246760 (1981-01-01), Cann et al.

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