| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance dust collecting performance without tearing dust collection paper by keeping the distance between the tip of a dust collection needle and an electrode plate at a specified interval and vertically fixing detachably a unit in which an ionizing electrode projectingly provided with plural dust collection needles at the back side of a belt-like electroconductive plate and plural ionic needles at the front side respectively is attached. SOLUTION: Upper and lower attaching parts 30, 31 are respectively formed on the bottom of a central front side of a covering plate 7 and on the upper surface of a central front side of a supporting base 1 so that the distance between the tip of each dust collection needle 23 constituting the ionizing electrode 15 and the dust collection electrode plate 8 is kept at a prescribed distance, preferably about 4cm distance and the ionic unit 16 is made attachable/detachable. Since the dust collection electrode plate 8 is attached over the almost whole surface of a vertical surface of the front surface of a dust collection paper fixing plate 2, the surface area is large, and also since the distance from the tip of each dust collection needle 23 to the dust collection paper is about 4cm and always held constant, the collection efficiency of the ionized dust is high. Also since electrode do not strike the dust collection paper strongly, the dust collection paper is not tore.</p> |
