| 摘要 |
PROBLEM TO BE SOLVED: To provide a pleated filter, in which pleated parts are easily visible to the corners. SOLUTION: A pleated filter 106 is provided with a plurality of pleated parts 108 alternately protruding on the upstream side and the downstream side of ventilation. A filter frame part 107 to hold the pleated filter 106 has translucency, and is provided with form holding parts 115 to hold the form of the pleated parts 108 of the pleated filter 106. External light can be taken to the pleated parts 108 through the form holding part 115, thereby the pleated parts 108 are easily visible to the corners. COPYRIGHT: (C)2010,JPO&INPIT
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