Is the higher the cooling fan speed the better?

       When purchasing cooling fans, we will select them according to the parameters required by the equipment, including the fan's air volume, air pressure, current, power, noise, speed, etc. Some customers may think that the higher the speed of the cooling fan, the better, so that the larger the air volume, the faster the heat dissipation. Let's take a look at the higher the speed of the cooling fan.

       In fact, the higher the rotation speed, the better. The higher the rotation speed, the more powerful the fan is, but the higher the rotation speed, the louder the noise. When choosing the fan speed, we need to choose according to the standard parameters required by our own products. Absolutely speaking, it is better to have a high speed or a low speed. It can cool the equipment and reduce the noise. If the speed of the cooling fan exceeds its standard value, it will run under overload for a long time, and the heat difference will be larger. , but can not achieve the best heat dissipation effect, so the higher the speed of the cooling fan, the better the heat dissipation is not established.

       With the change of application conditions and ambient temperature, different speed fans are sometimes required to meet the needs. The high speed of the fan means that the fan takes a larger amount of air. Without considering other factors, the fan with a fast speed has better cooling effect (provided that the fan is the same or similar), but its shortcomings are also very obvious, that is, it will Shorten the life of the fan. Of course, it is also related to the bearing of the fan. If it is an oil-containing bearing, the high speed may not be a good thing, while the ball can achieve a higher speed.

       In actual use, the wind speed of a fan of the same size is inversely proportional to the wind pressure. The faster the wind speed, the larger the air volume, and the smaller the wind pressure will be, so that the wind cannot completely blow to the bottom of the heat sink, which will cause heat to accumulate at the bottom of the heat sink, weakening the heat dissipation effect. Therefore, if it is necessary to increase the air volume and air pressure of the fan at the same time, the only way is to increase the size of the fan.

      However, increasing the size of the fan will lead to a series of problems, such as excessive weight. So, in the end, you have to find a balance based on your product usage. It is not to say that the pursuit of high speed is good, it should be selected according to your product needs.