Electric heating device for heating the interior of a switch cab

Details Electric heating device for heating the interior of a switch cab Electric heating device for heating the interior of a switch cab

1979-12-31

1982-09-28

Bartis, A.

Electric heating

Heating devices

With heating unit structure

165 80B, 165183, 165185, 219209, 219345, 219365, 219505, 219526, 219536, H05B 350, F24H 706, F28F 116

Patent

active

043520081

ABSTRACT:
An electric heating device for heating the interior of a cabinet containing electrical apparatus, such as a switch or distribution apparatus, to prevent sweating or condensation therein, includes at least one PTC electrical resistance heating and temperature self-regulating heating element situated in the interior of an elongated body made of thermally conductive material that is thermally connected to a radiator. The radiator is formed by a pair of flat base plates extending laterally from opposite sides of the body and radiator fins extending only from the base plates and only from one flat side thereof. The body is a massive hollow element having a wall thickness greater than that of the base plates and fins and a height greater than the thickness of the base plates. The body, base plates and fins are formed as a one piece extrusion. A permanent magnet may be used to secure the body to the interior surface of a steel cabinet.

REFERENCES:
patent: 1660218 (1928-02-01), Burgher
patent: 1884585 (1932-10-01), Crossley
patent: 2683209 (1954-07-01), Beckjord
patent: 2861163 (1958-11-01), Asakawa
patent: 3194944 (1965-07-01), Papp
patent: 3243753 (1966-03-01), Kohler
patent: 3338476 (1967-08-01), Marcoux
patent: 3396458 (1968-08-01), Meng et al.
patent: 3564199 (1971-02-01), Blaha
patent: 3748439 (1973-07-01), Ting et al.
patent: 3824328 (1974-07-01), Ting et al.
patent: 3940591 (1976-02-01), Ting
patent: 4091267 (1978-05-01), Grant

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