| 摘要 |
PROBLEM TO BE SOLVED: To simplify the constitution of a device for detecting a filter replacing timing for an air purifier. SOLUTION: In the air purifier wherein a fan 11 driven to rotate by an electromotor 31 is provided and dust in air sent by the fan 11 is collected by a filter unit 10, a filter replacing period detector 41 capable of detecting the replacing period of a filter element on the basis of the current value to the electromotor 31 is connected to the drive circuit 40 of the electromotor 31. |
