High frequency heating apparatus with wireless temperature probe
US4518839A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1983 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Mar 2, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/6467
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A novel high frequency heating apparatus for detecting the internal temperature of an object contained in a heating chamber and controlling the heating thereof is disclosed, in which the temperature change of the object is picked up as a change of the resistance value of a thermistor. The resistance change is converted into a change of the oscillation frequency of an oscillator and transmitted with the ultrasonic wave as a medium. The power supply for the transmitter circuit is provided in such a manner that the high frequency filled in the heating chamber for heating the object is received by an antenna and rectified by a diode. At the receiving end, this ultrasonic wave is picked up as a temperature signal of the object, and processed by a microcomputer, so that the temperature of the object is detected for heating control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.