Vehicular air heater using PTC heater tablets associated with fu

Electric heating – Heating devices – Combined with diverse-type art device

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Details

219203, 219505, 219530, 219540, 338 22R, H05B 102, H05B 314, F24H 304

Patent

active

049637169

ABSTRACT:
An air heater mounted in an elongated ventilation slot located beneath a window of a land, sea or air vehicle has a plurality of self-regulating ceramic heater tablets having a positive temperature coefficient (PTC) positioned between two metal strips and fastened thereto in thermally and electrically conductive relation.
Heat exchangers comprising sheet metal fins with baffles are secured in electrically and thermally conductive relation to the opposite sides of the strips so that the baffles introduce turbulence into the air flowing over the strips. Other metal strips having electrical terminals are thermally and electrically connected to the fins opposite the first named strips for energizing the heater tablets. The PTC tablets are spaced to define flow passages therebetween so that the air flowing through the ventilation slot passes over the heat exchangers, plates and tablets for rapidly withdrawing heat from the tablets. At least one of the plates can be divided into segments with gaps therebetween to accomodate thermal expansion of the plates.

REFERENCES:
patent: 2546355 (1951-03-01), Bloomer
patent: 3250325 (1966-05-01), Rhodes et al.
patent: 3313915 (1967-04-01), Chamberlain
patent: 3331940 (1967-07-01), Reid
patent: 3496855 (1970-02-01), De Boer
patent: 4414052 (1983-11-01), Habata et al.

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