Microwave ovens and methods of cooking food

Details Microwave ovens and methods of cooking food Microwave ovens and methods of cooking food

1985-07-08

1987-03-03

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055M, 99325, 426243, H05B 668

Patent

active

046477462

ABSTRACT:
A microwave oven has a magnetron for supplying microwave power to a cavity of the oven, and an electrical resistance heating element over which air is blown by a fan to provide a forced flow of hot air through the cavity. The variation in hot air temperature is monitored, and the slope of the temperature/time variation is sensed after a predetermined time interval from the commencement of cooking with the oven in a cold condition. The sensed slope is then used to predict the time period it will take the hot air temperature to reach a predetermined threshold, and the microwave power and the hot air are discontinued after the predicted time period has elapsed.

REFERENCES:
patent: 4317977 (1982-03-01), Buck
patent: 4379964 (1983-04-01), Kanazawa et al.
patent: 4390768 (1983-06-01), Teich et al.
patent: 4481394 (1984-11-01), Tanabe
patent: 4484065 (1984-11-01), Ueda
patent: 4488025 (1984-12-01), Tanabe
patent: 4488026 (1984-12-01), Tanabe
patent: 4499357 (1985-02-01), Kojima
patent: 4533809 (1985-08-01), Eke

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