| 摘要 |
PURPOSE:To ensure that dust collection efficiency and deodorization efficiency can constantly be maintained while running cost is held at low level by replacing an existing filter with a new one, or winding a roll filter, if this type is to be used, in the case of an actual clogging state. CONSTITUTION:An ozone concentration detector 7 is provided on the secondary side of an ozone generator 4 halfway through an air circulation route in a casing of a main device system, and at the same time, a filter clogging indicator circuit which indicates a filter clogging if an ozone concentration detected by the detector 7 is above a specified level, is provided. In addition, a roll filter is used as a filter 3, and a winding control circuit which allows a winding device 18 for winding the filter 3 to be driven on the basis of the detection results of the ozone concentration detector 7. |
