Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1991-08-19
1994-03-22
Paschall, Mark H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219494, 219483, 219411, 219412, H05B 102, F27D 1102
Patent
active
052966836
ABSTRACT:
A method and apparatus is disclosed for automatically preheating an oven, such as a food oven, based upon its immediate usage history. This preheat function operates by regulating the base heating elements until the temperature of the base plate is within a specified temperature range from the pre-programmed base set point temperature, and then turning quartz lamps on until the air temperature within the oven cavity reaches a certain fixed preheat "exit" temperature. This preheat exit temperature need not be a fixed value, but can be a function of the base set point temperature or the air temperature before or during the preheat operation. In addition, the preheat function can be performed at various times during the oven's operation, and not necessarily only upon power up of the oven.
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Burkett Doug
Mercer Gary L.
Henny Penny Corporation
Paschall Mark H.
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