| 摘要 |
The invention relates to a device (1) for filtering contaminated air, comprising an air filter, an intake fan (27) driven by an electric motor (28), a filter housing (2), to which the air filter can be fastened by means of a threaded connection, and a battery (18) for driving the electric motor, characterized in that the intake fan (27) has a guide blade (29) and an impeller (30), and the intake fan (27) is arranged in a chimney-shaped shell (25) on the filter housing (2). |
