Induction heating apparatus with thermistor and magnetic sensor
First Claim
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1. An induction heating apparatus having an induction heating coil provided below a top plate means for supporting a container of magnetizable material thereon, said induction heating apparatus comprising:
- thermistor element means provided on the undersurface of said top plate means for controlling energization of said induction heating coil;
magnet member means movably provided below said top plate means so as to be raised through attraction thereof to a said container of magnetizable material on said top plate means; and
switching member means provided below said magnet member means for selective energization and de-energization of said induction heating coil in response to the movement of said magnet member means;
said magnet member means being formed to define bore means therethrough in a predetermined position corresponding to said thermistor element means so as to accommodate said thermistor element means into said bore means upon raising of said magnet member means for preventing collision therebetween and for providing access to said thermistor element means from beneath said magnet member means; and
said apparatus further comprising support means for thermistor element means extending through said bore means.
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Abstract
An improved induction heating apparatus as applied, for example, to a cooking oven in which there is employed a magnet having a bore formed in it, with a thermistor being installed on the top plate of the apparatus in a position corresponding to the bore so as to eliminate possible breakage of the thermistor, while the curie temperature of the magnet member is set at a predetermined level for further improvement in safety.
52 Citations
7 Claims
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1. An induction heating apparatus having an induction heating coil provided below a top plate means for supporting a container of magnetizable material thereon, said induction heating apparatus comprising:
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thermistor element means provided on the undersurface of said top plate means for controlling energization of said induction heating coil; magnet member means movably provided below said top plate means so as to be raised through attraction thereof to a said container of magnetizable material on said top plate means; and switching member means provided below said magnet member means for selective energization and de-energization of said induction heating coil in response to the movement of said magnet member means; said magnet member means being formed to define bore means therethrough in a predetermined position corresponding to said thermistor element means so as to accommodate said thermistor element means into said bore means upon raising of said magnet member means for preventing collision therebetween and for providing access to said thermistor element means from beneath said magnet member means; and said apparatus further comprising support means for thermistor element means extending through said bore means. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An induction heating apparatus comprising:
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top plate means for supporting a container of magnetizable material thereon; induction heating coil means beneath said top plate means for heating a said container and its contents; hollow magnet member means beneath said plate means responsive to the presence of a said container thereon to assume a raised position through attraction thereof with respect to said container; switching member means responsive to movement of said magnet member means for selectively energizing and de-energizing said induction heating coil means; magnet receptacle means movably accommodating said hollow magnet member means beneath said top plate means and restricting the upward movement thereof; and thermistor element means mounted on said magnet receptacle means in registry with the hollow portion of said magnet member means in the said raised position thereof and pressed against said top plate means for controlling energization of said induction heating coil and maintaining the temperature of said container and its contents being heated thereby.
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Specification