Patent ID: 7205507

Claim:
A food cooking and heating apparatus comprising: a food holding oven having at least one door for access to the interior thereof, an air heating chamber having an inlet and an outlet, a variable air heating element within the air heating chamber, an air intake passageway to conduct heated air from the outlet of the air heating chamber to the food holding oven, an exhaust passageway to conduct air from the food holding oven to the inlet of the air heating chamber, an air temperature sensor located at the outlet of the heating chamber and a second sensor located at the inlet of the air heating chamber, a closed air convection system consisting of a variable speed blower in the air heating chamber for circulating air past the variable air heating element, through the intake passageway, through the food holding oven, through the exhaust passageway and back to the air heating chamber, a control for selecting a desired temperature to be maintained in the food holding oven, and a circuit for comparing the sensed temperature at the outlet and the sensed temperature at the inlet of the heating chamber to the selected temperature causing the variable air heating element to operate and the speed of the blower to increase when more heat is required and reduces both heat and blower speed as the need for the higher heat and air flow is no longer required, and when preset parameters are reached automatically sets the temperature to a preset temperature and holds the heated product to the predetermined temperature.