Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1992-03-12
1993-06-15
Walberg, Teresa J.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219465, H05B 374
Patent
active
052201554
ABSTRACT:
An electric range (R) has a glass/ceramic cooking top (S) upon which rests a cooking utensil. Electrical heating apparatus (10) has an electrical resistance heating element (12) to which an electrical current is supplied. This causes the heating element to generate heat. A heat sink (16) is interposed between the heating element and the cooking top for absorbing heat energy from the heating element and for spreading the energy under the surface area of the top by conduction. The heat sink is of an electrically insulative, translucent, aluminum nitride material or similar high thermal conductivity material. An insulation cake (20) supports the heating element and heat sink adjacent an underside of the cooking top and provides both electrical and thermal insulation. A pan (24) supports the insulation cake, the heating element (12) and the sink (16) in intimate contact with each other and the underside of the cooking top for maximum heat transfer by conduction. The heating element also functions as a temperature sensor responding with a change in electrical resistance to a change in temperature of the heating element as influenced by the cooking process. The change in electrical resistance is the input for an electronic control which prevents excessive temperature of the glass/ceramic cooking top.
REFERENCES:
patent: 3047702 (1962-07-01), Lefebvre
patent: 3646321 (1972-02-01), Siegla
patent: 3674983 (1972-07-01), Hurko
patent: 3686477 (1972-08-01), Dills
patent: 3805023 (1974-04-01), Wainer
patent: 3805024 (1974-04-01), Joeckel
patent: 3885128 (1975-05-01), Dills
patent: 4507546 (1985-03-01), Fortune
patent: 4946198 (1976-03-01), Foote
Emerson Electric Co.
Walberg Teresa J.
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