| 摘要 |
<p>PURPOSE:To improve dust collecting efficiency and to maintain the initial dust collecting efficiency for long time. CONSTITUTION:The 1st and 2nd plate electrodes 2, 3 differing in potential from each other are arranged, parallel to the flow of air, in the valleys on the air suction side and on the filtered air delivery side of a pleat-shaped filter medium with electrification property 1 respectively. On either one surface of those on the air suction side and on the filtered air delivery side of the filter medium 1 is provided a mesh-shaped electrode 4 having the intermediate potential between those of the 1st and 2nd plate electrodes 2, 3.</p> |
