2. When the protective cover of the electric fan is covered, hold the blade of the fan by hand, and first remove the big nut in front of the blade of the electric fan.
3. Grasp the gray-white button in the middle and twist it hard to remove the fan blade.
Extended data:
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. When electric energy is converted into mechanical energy, due to the existence of coil resistance, it is inevitable that some electric energy will be converted into heat energy. In addition, low-power motors such as DC motors and DC brushless motors are more and more widely used in small electric fans.
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: when the electric fan is working, because there is current passing through the coil of the electric fan, the wires are resistive, which will inevitably give off heat and the temperature will naturally rise.
Because there is a lot of sweat on the surface of human body, indoor air will flow when the electric fan works, so it can promote the rapid evaporation of sweat, and "evaporation needs to absorb a lot of heat", people will feel cool.
Data reference source Baidu Encyclopedia _ electric fan