Automatic heating appliance with ultrasonic sensor

Details Automatic heating appliance with ultrasonic sensor Automatic heating appliance with ultrasonic sensor

1987-10-21

1989-05-16

Leung, Philip H.

Electric heating

Heating devices

With current connection and/or disconnection means

219 1055B, 219 1055F, 340686, 99325, H05B 668

Patent

active

048312398

ABSTRACT:
A heating appliance comprising a heating chamber, a heating device for heating an object which is encased in the heating chamber and a turntable provided in the heating chamber and arranged to be rotatable about its own axis and to hold thereon the object. Included therein are an ultrasonic sensor for transmitting an ultrasonic wave toward the object and receiving an echo wave returning therefrom and a control unit for controlling the ultrasonic sensor. The control unit successively calculates the distances of the object from the ultrasonic sensor on the basis of the transmission and reception of the ultrasonic wave and determines the heating condition of the object on the basis of the successively calculated distances and controlling the heater in accordance with the determined distinctive feature. This does not require an input operation in terms of the class and category of the object to be heated, resulting in improving the automation of the heating appliance.

REFERENCES:
patent: 4157464 (1979-06-01), Smith et al.
patent: 4278866 (1981-07-01), Nevins et al.
patent: 4434341 (1984-02-01), Busby
patent: 4456806 (1984-06-01), Arimatsu
patent: 4591684 (1986-05-01), Tanabe et al.
patent: 4596914 (1986-06-01), Morino

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