Explosion-proof electric air heater

Details Explosion-proof electric air heater Explosion-proof electric air heater

1976-08-09

1978-09-26

Bartis, A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

165122, 219342, 219364, 219367, 219368, 219370, 219376, 219530, 219540, 338 51, 338 57, 338230, H05B 302, F24D 1500, F24H 306, H01C 1082

Patent

active

041173082

ABSTRACT:
An electric heater, particularly adapted for supplying heat to hazardous areas where the atmosphere in the area contains particles or fumes that are readily ignited. The heater includes one or more heat radiating members, each cast about a sheathed electric heating element. The terminal ends of the heating element extend into a sealed explosion-proof terminal box. The heat radiating members are serially disposed in a tubular casing, and a motor-operated fan blows air through the casing and over the members, the air being heated as it flows over the heat radiating members.
Each member is in the form of an annular hub having integral, heat-dissipating fins extending radially thereof. The outer surface of the hub is formed with a contour that is angled or curved in the direction of the air flow, and such contour is constructed and arranged to provide a Venturi effect to draw air from the inner portion of the hub to the outer periphery and thus prevent build-up of excessive heat at the inner portion.

REFERENCES:
patent: 1526523 (1925-02-01), Brown et al.
patent: 2109279 (1938-02-01), Soverhill
patent: 2158605 (1939-05-01), Wiegand
patent: 2455839 (1948-12-01), Walton
patent: 2590336 (1952-03-01), Mast
patent: 2606274 (1952-08-01), Spierer
patent: 2683209 (1954-07-01), Beckjord
patent: 2839657 (1958-06-01), Mast
patent: 3176117 (1965-03-01), Knoll et al.

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