Electric heating – Inductive heating – With diverse-type heating
Patent
1999-02-22
2000-11-14
Leung, Philip H.
Electric heating
Inductive heating
With diverse-type heating
219622, 219624, 219670, 219675, 219680, 219629, 219699, 219738, 99DIG14, 99451, H05B 612, H05B 640, H05B 676, H05B 678
Patent
active
061473367
ABSTRACT:
A cooking apparatus includes a fan 13 provided at the top wall of a heating chamber 2 with its front face directed downwards. A spiral coil 14 in the form of a flat disc is provided around a rotation shaft 12 above the heating chamber 2. When high-frequency current is supplied to the coil 14, the coil 14 generates an alternating magnetic flux. The magnetic flux penetrates a shielding plate 16 and the fan 13, whereby the fan 13 is inductively heated. The fan 13 draws air from the heating chamber 2 and propels the air back to the heating chamber 2, where the air is heated when it contacts the fan 13. As a result, the temperature in the heating chamber rises, so that an object placed on a turntable 5 is cooked. By such a constitution, it is not necessary to keep additional space open for a heating element because the fan 13 functions as a heating element. Accordingly, it is possible to enlarge the diameter of the fan 13 so that the blowing efficiency is enhanced. Also, by this constitution, the number of parts is reduced and the structure is simplified.
REFERENCES:
patent: 2406640 (1946-08-01), Siecke
patent: 4112285 (1978-09-01), Pan et al.
patent: 4471191 (1984-09-01), Greis et al.
patent: 4503305 (1985-03-01), Virgin et al.
patent: 4987828 (1991-01-01), Nuns et al.
Fujita Takeshi
Hirata Toshiyuki
Ushijima Kazufumi
Japanese Research and Development Association for Application of
Leung Philip H.
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