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Electric fan circuit board

By:PCBBUY 04/27/2021 10:06

The electric fan is a household appliance that uses a motor to drive the fan blades to accelerate the circulation of air. It is mainly used to cool the heat and circulate the air. Widely used in homes, classrooms, offices, shops, hospitals and hotels.

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The fan is mainly composed of components such as fan head, blade, net cover and control device. The fan head includes a motor, front and rear end covers, and a shaking head air supply mechanism. The main components of the electric fan are: AC motor. Its working principle is: the energized coil is forced to rotate in the magnetic field. Electrical energy is converted into mechanical energy, and due to the resistance of the coil, it is inevitable that part of the electrical energy will be converted into thermal energy.

The common household electric fan is essentially an axial fan, that is, the flow direction of the wind is parallel to the rotation axis of the fan blade.

Working principle of electric fan


In addition, DC motors, DC brushless motors and other low-power motors are increasingly used in small fans. When the electric fan works (assuming that there is no heat transfer between the room and the outside), the indoor temperature not only does not decrease, but increases. Let's analyze the reason for the temperature increase: when the electric fan is working, because there is current flowing through the coil of the electric fan, the wire is resistive, so heat will inevitably be generated and the temperature will naturally rise. But why do people feel cool? Because there is a lot of sweat on the body surface, when the electric fan works, the indoor air will flow, so it can promote the rapid evaporation of sweat, combined with "evaporation needs to absorb a lot of heat", so people will feel cool.

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