| 摘要 |
<p>PURPOSE:To provide an air cleaner which controls a fan accurately based on an output from a dust concentration detector and, at the same time, indicates an accurate dust concentration and also the timing of cleaning an earth polar plate. CONSTITUTION:The current value of a discharge current running through a dust collection part 21 is detected by a conversion means 22, and is compared with a current value before a specified time which is set in a reference value setting means 23 using a comparison means 25. Further, a dust concentration is displayed based on the comparison results, and a fan 28 is controlled by a dust concentration display means 26.</p> |
