摘要 |
Filter apparatus (100) for trapping particles suspended in a gaseous fluid stream generally includes a first and a second electrode (116, 118) with a porous filter (112) therebetween along with electrical contacts (144, 146) for applying a DC voltage across the first and second electrodes (116, 118). A third electrode (150) is provided and a frame (154) is included for removably supporting the porous filter (112), along with the first, second, and third electrodes (116, 118, 150) in order to electrify, by induction, the third electrode (150) with a voltage in the third electrode (150) in order to increase trapping of the particles by the filter apparatus (100). |