Vane of tower cooker hood

The utility model discloses a tower type blade of cooking fume exhausters, which is composed of a base body 1, a blade 2, a circular ring 3 and a blade 4, wherein, the inner edge of the blade 2 is connected with the base body 1, the lower end of the outer edge is connected with the circular ring 3, and the circular ring 3 is connected with the inner edge of the blade 4. A fan made by the utility model has the advantage of large air exhaust rate, long distance suction force can reach 50 cm, motor power is only 10 W, and noise can be reduced to 30 db. The utility model and the fan which is made by the utility model not only are suitable for being used in cooking fume exhausters, but also are suitable for being used in various electrical devices which requires ventilation and air change.