Cooking apparatus

Details Cooking apparatus Cooking apparatus

1981-03-04

1983-11-08

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

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

219347, 219405, 219461, 219464, 219510, H05B 368

Patent

active

044144652

ABSTRACT:
An electric cooker or cooking hob has a ceramic plate 2 on which there are a number of hot plate areas each heated by a respective annular heating element 4 disposed within an insulating housing 7. A temperature dependent resistor 9 is disposed below the hot plate area at the center of focus of a reflector 8 which is arranged to focus radiant energy from the hot plate area onto the resistor 9 while at the same time shielding the resistor 9 from direct radiation from the electric heating element 4. The signal derived from the resistor 9 is a measure of the temperature of the hot plate and can be used to provide a thermal tripping function to prevent over-heating of the hot plate area and/or to carry out closed loop control of the temperature of the hot plate area. The reflector 8 may be replaced by a shield which shields the resistor 9 from direct heating by the heater.
A further annular heating element surrounding the element 4 may be provided, with the control circuitry enabling either the element 4 alone or element 4 plus the outer element to be energized.

REFERENCES:
patent: 3710076 (1973-01-01), Frazier
patent: 3883719 (1975-05-01), Hurko
patent: 4161648 (1979-07-01), Goessler
patent: 4243874 (1981-01-01), Fischer
patent: 4327280 (1982-04-01), McWilliams

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