| 摘要 |
PROBLEM TO BE SOLVED: To treat a larger amt. of air in a less occupied space by closing one end opening of a cylindrical filter arranged in an air duct and forming air passages between another end opening and the air duct through the outer periphery of the cylindrical filter. SOLUTION: A cylindrical filter 1 is concentrically arranged in an air duct 2 through a gap 3 and the opening of the downstream end is closed by a blank plate 4 and the space between the opening of the upstream end and the inner peripheral face is closed by a closing plate 5. Air entering into the filter 1 from the air duct 2 is forcibly made to flow wholly into the air duct 2 on the downstream through the side face of the filter 1. The area of the filter is controlled by changing the length of the cylindrical filter in the air flow direction to decrease the face velocity when it passes through the filter even if the filter has a large resistance and to suppress pressure loss without decreasing the amt. of treated air. It is possible to treat effectively a large amt. of air in a less occupied space. |
