Dustproof draft hood

The utility model discloses a dustproof draft hood, including fan housing, the dustproof cotton of fan housing and interior clamp plate, wherein, the fan housing is fixed a position mutually with interior clamp plate and is connected, and forms an inner chamber between fan housing and the interior clamp plate, the fan housing is arranged in among this inner chamber by dustproof cotton. The beneficial effect of the utility model: the utility model provides an it is dustproof cotton that to adopt the low resistance of purpose -built high flux to filter cotton, repeatedly usable, in only need lifting off during the change clamp plate can, the clamp plate adopts the fix with screw in in addition, guarantees that dustproof cotton does not firmly come off, it is also very convenient to dismantle, the dustproof cotton change of being convenient for. Outdoor air, dust and sand, rainwater be through tripe and the filtration and the separation of crossing the filter pulp, makes that the air is circuitous to be got into