Blow. According to relevant public information, the function of the old hand blower is used to blow air, and it is used as a tool in rural areas to burn firewood as a big pot of rice. The fan is mainly composed of the following six parts: motor, air filter, fan body, air chamber, base (also oil tank) and oil drop nozzle. The blower operates eccentrically through the eccentric rotor in the cylinder, and the volume change between blades in the rotor slot sucks, compresses and spits out air. The old hand blower is similar to a fan, which needs to turn the blades by hand.