Heavy drum fan

The utility model discloses a heavy drum fan, including the export silencer that is used for the imported silencer that admits air and is used for giving vent to anger, the cavity is connected to the gas outlet of said imported silencer, and the air inlet of export silencer is connected to the gas outlet of cavity, and the cavity connects the motor, realizes forming switching on of air current the air and flow through motor rotatory, said export silencer passes through the pipe connection aerator, and the aerator is located under water, consequently when the motor operates, can carry the air to the aquatic through what the aerator was not stopped, improves the aquatic dissolved oxygen, the utility model discloses simple structure, convenient to use be fit for to breed the district and uses, and dissolved oxygen in can effectual increase water improves the self-purification capacity of water, and overall structure is little simultaneously, simple to operate, low in cost is fit for the popularization of large tracts of land