| 摘要 |
PROBLEM TO BE SOLVED: To provide an air-cleaning device capable of forming the cleaner space by equalizing air volume and forming equal descending laminar flow. SOLUTION: In an air-cleaning device with a fan filter unit installed at the upper part of a space surrounded by partitions on all sides for blowing out clean air from the blowout face of the unit toward the space and keeping the inside of the space clean, it has such a constitution that a perforated plate having many openings is arranged in the space to allow clean air to flow toward the lower part of the space through the perforated plate.
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