| 摘要 |
Device making it possible to purify the urban air polluted by cars and factories. It consists of a case (1) which has two orifices (2 and 3). Inside, in one orifice (2) there is a fan (4) behind which there is a filter (6) and then again another fan (8). The polluted air (5) enters through an orifice (2), drawn in by a fan (4), passes through the filter (6) and reemerges purified (7) through the other orifice (3), propelled by the other fan (8). The filter (6) is interchangeable. The two fans (4 and 8) frame the filter (6). <IMAGE>
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