| 摘要 |
<p>PURPOSE:To enhance dust collection efficiency by a bag-shaped main filter, by providing an insulating support to a press plate for holding the bag shaped main filter and a bag-shaped earth electrode in a state pressing both of them from an opening side and providing a separate earth electrode on the support. CONSTITUTION:Dust-containing air sucked from a suction hole 26 is supplied to a prefilter 27 to remove coarse dust and reaches an ionizing part to charge fine dust by an ion current. The charged dust flows in the bag of a bag-shaped charged filter 28 to receive electrostatic force by the electric field in the bag- shaped charged filter 28 and sucked to the surface of fibers to be adhered to and collected by said fibers. Further, since high voltage high electric fields are newly formed between the surface of the bag-shaped charged filter 28 and separate earth electrodes 34, 35, the charged dust is collected by said earth electrodes 34, 35 in a stage flowing in the bag of the bag-shaped charged filter 28.</p> |
