| 摘要 |
PURPOSE:To simplify the constitution of the whole of an induction heating device, and lower the manufacture cost thereof. CONSTITUTION:This induction heating device 11 for a microwave oven is composed of a spirally wound heating coil 12 of a copper sheet 21 laid on the upper surface of a printed circuit board 20. Also, the lower surface of the board 20 is fitted with a shielding conductor pattern for shielding a leakage flux from the heating coil 12. In addition, the pattern is composed of a plurality of long and narrow conductor patterns providing a form where eddy current hardly flows. According to this construction, the heating coil 12 or the whole of the device 11 is substantially simplified, and the manufacture cost thereof is substantially lowered. At the same time, the whole of the device 11 becomes thin. |
