| 摘要 |
PROBLEM TO BE SOLVED: To reduce contamination of a ventilator by providing a filter part for covering one surface side of a support plate arranged on an upperstream side in an air current, and a bag part to be formed continuously to a filter part for covering the whole or a part of an end edge of a support plate, being on the other surface side of the support plate. SOLUTION: A filter 11 for reducing contamination by smoke black or the like of a ventilation fan or the like comprises a filter part 13 and a bag part 15, and a filter device 17 wherein the filter is equipped thereto and used, comprises a support plate 19 and an orifice frame 21. A raw material constituting the filter 13 is a sheeted fiber comprising a polyolefin resin or the like, and a raw material constituting the bag part 15 is a stretchable nonwoven fabric for which a fiber comprising the same resin as that for the filter part 13, is used. When the filter 11 having such a bag part 15 is used, an end part of the support plate 15 comes easy to be inserted between the bag part 15 and the filter part 13 via an opening 25 to which the filter part 13 is exposed, and a working property in installation can be improved. |
