| 摘要 |
PROBLEM TO BE SOLVED: To prevent vibration and abnormal sound due to the eccentricity of a rotary body, whose posture is stabilized in accordance with the rotation of the rotary body. SOLUTION: A motor driver 88 for an air cleaner, in which a water spraying rotary body 41, whose posture is stabilized in accordance with the rotation thereof, is connected to the rotating shaft of a motor 5, is equipped with a detecting unit 48, detecting the time of elapse after starting the motor 5, and a control unit 58, controlling the rotating speed of the motor 5 based on the time detecting signal S2 of the detecting unit 48. The rotating speed of the motor 5 is increased by one step, multi-stage or steplessly when the time is elapsed from the starting time of the motor whereby the posture of the water spraying rotary body 41 is stabilized. Accordingly, vibration and abnormal sound, which are due to the eccentricity of the water spraying rotary body 41 and which are generated by rotating the water spraying rotary body 41 with an objective rotating speed from the initial operation thereof, can be prevented. |
