| 摘要 |
An electric dust collecting unit disclosed herein includes a corona discharging portion (8) for giving rise to corona discharge to electrically charge cigarette smoke particulates, toner, and other floating particulates in air, an electric collecting portion (9) disposed on a leeward side of this corona discharging portion (8), for electrically collecting the floating particulates charged at the corona discharging portion (8), and a box-type frame (10) with its opposite surfaces opened, in such a configuration that the corona discharging portion (8) has a plurality of needle electrodes (8a) which is disposed in such a way that their respective needle tips may be directed toward the leeward side (that is, with their backs directed toward a front face opening in the box-type frame (10)). <IMAGE> |
