High-frequency heating apparatus with wireless temperature...

F - Mech Eng,Light,Heat,Weapons – 24 – C

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327/2.51

F24C 7/02 (2006.01) G05D 23/24 (2006.01) H05B 6/68 (2006.01)

Patent

CA 1200583

ABSTRACT OF THE DISCLOSURE 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.

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