F - Mech Eng,Light,Heat,Weapons – 24 – C
Patent
F - Mech Eng,Light,Heat,Weapons
24
C
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.
422729
Kikuchi Itsuo
Ohkawa Shuji
Taguchi Shunichi
Watanabe Mitsuru
Gowling Lafleur Henderson Llp
Hitachi Heating Appliances Co. Ltd.
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