| 摘要 |
PURPOSE:To prevent a bathing person from getting an electric shock by interrupting the route of a leaking high frequency current by a filter even when a motor part, etc., is not completely grounded by providing the filter to block the high frequency current on the output part of an inverter. CONSTITUTION:Filters 43 are respectively interposed between an inverter 13 and the coil 25 of a motor part 21 and the high frequency current is made hardly flow. For the filter 43, a coil 45 is wound around a toroidal core 44, for which sintering ferrite is used as a main material, and a high frequency is improved. Especially, by using the toroidal core 44, efficiency for forming a magnetic circuit is improved and further, there is no leakage of magnetic flux to cause noise. By interposing such a filter 43 in the middle of a lead wire from the inverter 13 to the motor part 21, the high frequency component in the output of the inverter 13 is attenuated and only the slight high frequency current leaks in hot water for bathing. Then the accident of the electric shock can be prevented. |
