The electric fan will feel the wind becomes smaller after a period of time, especially the higher the temperature, the more obvious. In fact, the electric fan wind has become smaller and smaller. When the fan fault becomes smaller, it is called really smaller, and when the external factors become smaller, it is called false.
Fan failure can be divided into mechanical parts and electrical parts of the fault, once the fan failure, you can maintain and ask people to repair. Self-maintenance refers to non-professional personnel who can clean the outside of the fan and fan blades under the condition of ensuring safety. The front edge of the fan blade collects dust, which causes the change of the front edge and thus the change of the aerodynamic mode, and the fan air volume is reduced. Timely dust removal is a general and effective way to solve the problem of fan reduction. For non-professionals, you can skip steps 2-4 below
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The electrical part of the internal fault of the fan is mainly a short circuit in the stator winding, especially in the starting winding, and the starting capacitance (phase-biased capacitance) capacity is reduced or the leakage is increased, resulting in changes in the magnetic field strength, which affects the fan speed, the fan slows down, and the torque is reduced, and the air volume is reduced. After the fan is opened, it takes longer than normal to reach the corresponding gear speed, and of course, the speed will be reduced. It's a good idea to replace a capacitor with the same capacity. (No capacitive motor can leave me a message)
Due to external factors, the air volume is reduced, and this false air volume becomes smaller, which can only be solved by changing the external environment. 1. The air intake of the fan is blocked (for example, the fan in the ceiling is sealed without air intake). 2. The temperature is too high, the humidity is too large (too small) will affect the fan air volume, many people will feel that the higher the temperature in summer, the smaller the fan wind, which is a normal feeling, but also the inevitable situation of the fan pneumatic principle, unless it is dedicated to high temperature fans. In this case, you can change the power to greater, or other cooling equipment.
Summary: 1. The electric fan wind becomes smaller, caused by external environmental factors and fan failure. 2. If you are a non-mechanical and electrical professional, you can only unplug the power off to ensure the safety of the case of external cleaning, but also to solve the problem of reduced air volume caused by this part of the problem, the other to professionals to deal with. Or get a fan with more air.