| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in the conventional microwave ovens that in order to make temperature distribution proper, increase in the outside diameter or weight of a coil part is required. SOLUTION: This microware oven has a heating coil 1, in which an inner circumferential side coil 1b and an outer circumferential side coil 1a are arranged at prescribed intervals, and a second stage heating coil 1c is arranged to form plural-stage winding with the inner circumferential side heating coil 1b; a central part magnetic material 6 arranged in the stage direction near the inner circumference of the inner circumferential side heating coil 1b and the second stage-heating coil 1c; and a bottom magnetic material 7 arranged under the heating coil 1, and whose inner circumferential side end part comes in contact with the central part magnetic material 6 or approaches it. |
