Multi-purpose air blower

The utility model belongs to a mechanical power blower, particularly a miniature blower for cookers and families. The utility model comprises a motor, a casing, a fan blade, a main shaft of the motor and a gear box. The utility model is characterized in that the fan blade is rotatablely connected with the main shaft of the motor, the main shaft of the motor is fixedly connected with an automatic clutch, and the fan blade is fixedly connected with an automatic hand-operated clutch mechanism. The fan blade of the multi-purpose blower is rotatablely connected with the main shaft of the motor via a bearing or a shaft sleeve. The casing of the blower is fixedly connected with a hand-operated speed changing mechanism, and the hand-operated speed changing mechanism is fixedly connected with the automatic hand-operated clutch mechanism on the fan blade. The utility model can be operated manually as well as electrically with the advantages of automatic switchover, high safety, convenient operation and low cost.