| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation filter enhanced in filtration effect and sound absorbing effect. SOLUTION: Moisture, dust and exhaust gas particulates contained in air flowing into each flow passage in the ventilation filter 1 are efficiently collected, removed, filtrated, and cleaned by a first cleaning filter 8, a second cleaning filter 9, and a third cleaning filter 12. Since the first cleaning filter 8, second cleaning filter 9, and third cleaning filter 12 can be removed from a ventilation port when the screwing of a fixing bolt 15 with a fixing nut 13 is released, these filters can be re-used after cleaning and replacement. COPYRIGHT: (C)2008,JPO&INPIT
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