Automatic heating appliance with ultrasonic sensor
US4831239A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1987 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Oct 21, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/6464
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.