Clothes dryer heating unit

Details Clothes dryer heating unit Clothes dryer heating unit

1975-07-31

1979-04-24

Bartis, A.

Electric heating

Heating devices

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

219367, 219368, 219376, 219382, 219532, 338 58, 338206, 338280, F24H 304, F26B 1100, H05B 312

Patent

active

041513983

ABSTRACT:
A forced convection electrical heater assembly advantgeously utilizing expanded resistance alloy foil or grid in a pattern which produces a uniform temperature distribution in the existing airstream and which produces relatively little flow restriction on the airstream. The resistance grid in the form of at least one continuous strip is strung in a sinuous path to form a plurality of planar reaches spaced uniformly across the flow passage and extending longitudinally from inlet to outlet. Grid support elements at the inlet and outlet are arranged to force air to pass through the resistance grid only once to thereby achieve a minimum flow restriction. Alternation of the grain of the expanded foil in each plane and between planes and the provision of a flow deflector at the exit contribute to temperature uniformity.

REFERENCES:
patent: 992728 (1911-05-01), McElroy
patent: 1632034 (1927-06-01), Moffitt
patent: 1688270 (1928-10-01), Doherty
patent: 1995673 (1935-03-01), Evans
patent: 2522542 (1950-09-01), Schaefer
patent: 3651304 (1972-03-01), Fedor

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