| 摘要 |
The induction heating coil is comprised of the step of pressing evenly both a helical litz wire and a gauze type litz wire, wherein the helical litz wire being twisted in one direction, the gauze type litz wire of a circular cylinder twisted with the helical litz wire being twisted in an opposite direction thereto, and the step of winding to as large diameter as necessary in a form of a snail. When applying a current to a first and a second litz wire(41,42) in a same direction, a magnetic filed(H1) is generated at the first helical litz wire(41) in one direction, while another magnetic filed(H2) is generated at the second helical litz wire(42) in another direction opposite to the direction of the magnetic field(H1). These two magnetic fields(H1,H2) cancel each other, thereby the eddy current, which is induced from an electromotive force which is generated by change in the magnetic flux of the two magnetic fields(H1,H2), being not generated.
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