I. Working principle of the fan
The main components of the electric fan are: AC motor. Its working principle is that the electrified coil is forced to rotate in the magnetic field. The conversion form of energy is: electric energy is mainly converted into mechanical energy, and at the same time, due to the resistance of the coil, some electric energy will inevitably be converted into heat energy.
When the electric fan is working (assuming that there is no heat transfer between indoor and outdoor), the indoor temperature will not decrease, but will increase. Let's analyze the reasons for the temperature rise together: when the electric fan is working, because there is current passing through the coil of the electric fan and the wire is resistive, it will inevitably generate heat and release heat, so the temperature will rise. But why do people feel cold? Because there is a lot of sweat on the surface of human body, when the electric fan works, the indoor air will flow, so it can promote the rapid evaporation of sweat, and evaporation needs to absorb a lot of heat, so people will feel cool.
Second, what are the types of fans?
1, which can be divided into single-phase capacitor, single-phase shield pole, three-phase induction, DC and AC/DC series commutator, DC permanent magnet and DC brushless fan according to the motor structure.
2. According to the classification of inlet and outlet air, it can be divided into axial fan, centrifugal fan and cross-flow fan.
3. According to the purpose, it can be divided into household electric fans and industrial exhaust fans.
4. Household electric fans: ceiling fans, desk fans, floor fans, wall fans, ceiling fans, ventilation fans, box fans, air-conditioning fans (i.e. air coolers), etc. There are table fans that shake their heads, and there are also box fans; Some floor fans shake their heads and turn pages. There is also a small wind electric fan, which is specially hung in the mosquito net. When you sleep at night in summer, the breeze blows gently as soon as you turn it on, so that you can sleep well and not get sick.
5. Industrial exhaust fan: mainly used for forced air convection. After the electric fan is used for a long time, it is easy to get a lot of dust under the fan blades. This is because when the electric fan is working, the blades are charged with static electricity due to friction with air, and charged objects can attract light and small objects, thus absorbing the fine dust floating indoors.
The working principle of the fan is mainly to convert electric energy into mechanical energy. There are many kinds of fans. When you go to the market, you can choose the products you want to buy according to your preferences and needs.