It is estimated that many small partners have not noticed the blades of the fan. Count the fan blades of your home carefully to see if they are odd or even? In the past cooling fans, there are often even-numbered blades, and the blades are opposite to each other. This kind of fan has been used for a long time, for example, the blades are worn out or accumulated too much dust, and the center of gravity is easy to shift, so that the fan will have problems of increased noise and poor rotation.
The current fan basically uses an odd number of blades, and its center of gravity is determined by all the blades at the same time. Even if individual blades are worn or dusted, the offset of the center of gravity is relatively small, and of course the noise is much smaller. Therefore, it is recommended that when you buy a cooling fan, you may wish to count the number of blades first, and try to choose a fan with an odd number of blades.
At the same time, the shape of the fan blades is also very particular. Generally speaking, high-speed fans should choose blades with radians and swept back, because they are more suitable for high-speed rotation and have lower noise. The straight fan blade is more suitable for low-speed fans, and its blowing coverage area is large, especially suitable for use on the top of the chassis, notebook stands, etc.
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