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US 5,296,683 AGranted
Preheating method and apparatus for use in a food oven
AssigneeHenny Penny Corporation
InventorsDoug Burkett, Gary L. Mercer
Life of this patent
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AssigneeHenny Penny Corporation
InventorsDoug Burkett, Gary L. Mercer
Estimating the term…
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.
In a control system for use with an oven having a cavity in which to heat a load, a thermally conductive heat source beneath a base plate upon which said load is placed, and a high thermal intensity heat source within the cavity, a method of preheating said cavity and said base plate, said preheating method comprising the steps of:
In a control system for use with an oven having a cavity in which to heat a load, a thermally conductive heat source beneath a base plate upon which said load is placed, and a high thermal intensity heat source within the cavity, an apparatus for preheating said cavity and said base plate, said preheating apparatus comprising the following elements:
Dependencies are inferred from the claim text.