| 摘要 |
A spiral member b, a helical member or an arrangement of parallel members, Fig. 2 (not shown), of water-absorbing material, e.g. ribbed canvas or polyurethane foam, are arranged in a container a with water maintained at a constant level therein. Air flows between an inlet c and an outlet d past the member or members so that the air is humidified and particles in the air are deposited on the member or members and collected in the water. The water may be electrically heated. <IMAGE> |
