The electric fan is a household appliance that uses motor to drive the rotation of the fan blade to accelerate the circulation of air, and is mainly used for cooling and cooling the air and circulating air. Widely used in homes, offices, shops, hospitals and hotels. The electric fan is mainly composed of a fan head, a fan blade, a mesh cover and a control device. The fan head includes an electric motor, front and rear end covers, and a moving air supply mechanism. As shown in the figure, the Great Wall FS7-40 electric fan control circuit diagram. Flum Float Hongkong Onice Limited , https://www.ousibangvape.com