Electric defrost heater for fin and tube refrigeration heat exch

Refrigeration – With means preventing or handling atmospheric condensate... – By external heater

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Details

219201, 219301, 219365, 219530, 219534, 219540, 338316, F25D 2108, H05B 300

Patent

active

040916375

ABSTRACT:
Apparatus for defrosting a heat exchanger, comprises a plurality of spaced parallel heat exchanger fins having sets of circular, collared, axially aligned apertures. The collars of each set coacting to define an essentially continuous tube. Refrigerant tubes pass through the essentially continuous tubes defined by a majority of the sets of apertures and are sized for engagement by the collars of the apertures in intimate heat conductive relation. Axially replaceable electrical heating elements traverse the essentially continuous tubes defined by a minority of sets of apertures instead of refrigerant tubes and the heating elements are sized to fit loosely in the apertures so the heat is transmitted from the element to the collars both by radiation and by conduction and so that axial relative movement between the elements and the collars is enabled.

REFERENCES:
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patent: 2266373 (1941-12-01), Marlo
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patent: 2529215 (1950-11-01), Hicke
patent: 2701455 (1955-02-01), Kleist
patent: 2987601 (1961-06-01), Levin
patent: 3099914 (1963-08-01), DeWitt et al.
patent: 3174297 (1965-03-01), Kuhn et al.
patent: 3280581 (1966-10-01), Turner

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