| 摘要 |
Electromagnetic induction occurs by conducting alternating current LCI in a heating coil (2a) and an alternating magnetic field (10) is caused. The alternating magnetic field (10) generates respective magnetic fluxes (3a and 3b) on faces A-A and B-B of a heating blade (1). Eddy currents of respective points, which flow in respective faces vertical to the magnetic fluxes (3a and 3b), negate each other. Remaining eddy currents (4a and 4b) flow along peripheral edges of the faces A-A and B-B. The eddy currents (4a and 4b) cause heat loss of electromagnetic energy and generate a Joule heat amount (P). The Joule heat amount (P) on the two faces, which is caused at an edge of a side of a blade edge (5c), is integrated with the blade edge (5c). The blade edge (5c) is a heat source of the Joule heat amount (P).
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