| 摘要 |
PROBLEM TO BE SOLVED: To provide an air cleaning unit enabled to keep the uniform speed of air flow when the multiple duct units are connected for supplying a large quantity of air flow by arranging an air volume controlling board to the opening part for attaching the air cleaning filter of the duct units on the side of an air blowing unit, in the air cleaning unit fixed with an air cleaning filter attached to the under surface of the duct. SOLUTION: The air cleaning unit comprises an air blowing unit 3 and ducts, wherein the air blowing unit under which is provided with an air inlet hole on the down stream side is provided with an air path built in with an blower fan for the circulation of air, the blower fan unit and the duct are arranged so that the upper edge surface of the blower unit is on the same horizontal plane with the upper surface of the duct, and in an air cleaning unit 2 extendedly connected to a plurality of the ducts under surface of which is attached and fixed with the air cleaning filter, the air volume control board is attached to the opening part on the side of the air blowing unit on the upstream side.
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