| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an air cleaner capable of stable operation without frequent change in the number of rotation of a blower and also capable of quickly coping with the increase of a dust concentration in the air. SOLUTION: The cleaner is constituted so that the moving average value of the dust concentration detected by an optical dust sensor is determined and the number of rotation of the blower is renovated in stepwise when the moving average value becomes continuously more than or less than the dirt standard value for a specified time. The cleaner is possible to quickly cope with the increase of the dust concentration in the air by setting a set time short when the output of the optical dust sensor is increasing and setting the set time long when the output of the optical dust sensor is decreasing.</p> |
