| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor drive type bubble generating device possible to reduce pump size in comparison with a current bubble generating device and possible to eliminate unpleasant noise during the use of the bubble generating device. <P>SOLUTION: In this bubble generating device formed by connecting a power source unit fixed outside of a bathroom to a pump motor, which is fitted to a side surface of a rear surface of a bath tub and which is provided with a suction part and a discharge part, through an electrically connecting cord part and taking air on the way of a discharge route of the pump to mix the air with the bathing hot water and to discharge it into the bath tub, a motor drive control unit is arranged in the power source unit. With this structure, a space for a substrate is eliminated from inside of the motor, and motor size can be reduced. As a motor driving method, a sinusoidal driving method is used. Vibration of the motor is restricted to reduce the generation of high tone noise, and unpleasant noise during the use can be eliminated. <P>COPYRIGHT: (C)2004,JPO |
