Tapered wind wheel

The utility model provides a tapered wind wheel which can improve the efficacy of absorbing and exhausting lampblack. The tapered wind wheel comprises a rear side plate, a front side plate, a fan blade and a motor shaft installation hole. The tapered wind wheel is characterized in that the outer diameter of the front side plate is smaller than the outer diameter of the rear side plate. The fan blade, the front side plate and the rear side plate are installed to form a whole fan. A lengthwise shaft of the fan blade and a center shaft of the wind wheel are not parallel and form a certain angle.