Computer cooling fan learning actually so big!

Yesterday someone asked Xiao Bian, the day before yesterday's push, "Worried about the life of solid state drives? Don't kidding! 》Is overheated, I would like to strengthen the cooling of my computer, I would like to buy a fan like a drumstick tomorrow, and ask Xiao Bian what to buy, this is the push of Xiao Bian today, on the issue of the heat of the small partners Answer it well (yesterday, day before yesterday, tomorrow, today ... ... dissatisfied with the service? Xiao Bian has already dizzy himself @ @).

Why are your fans not bad?

The fans look almost the same, that is, the size is different, but why some fans can be used for a long time, and some are not bad for two days? This is because of the difference in the structure of the fan itself.

Oil bearing fan

Oil bearing is the use of sliding friction sleeve bearings, the use of lubricants as lubricants and drag reducer, it is relatively simple and inexpensive process, of course, the price is the cheapest, quiet is not bad. But the disadvantages are too big: the life is short, and after working for a period of time, the loss of volatile oil and the intrusion of dust will cause the noise to increase at a slower speed, and more serious damage to the shaft will cause the vibration to occur. Finally, it will be completely useless. The problem with some computer fans stalling is due to the use of such fans.

Magnetic levitation fan

The magnetic bearing fan is actually an improved self-contained oil bearing fan. It uses the magnetic principle. The magnetic induction line is perpendicular to the magnetic float line. The axial line is parallel to the magnetic float line. The weight of the rotor is fixed on the running track and is almost no load. The shaft core is braced in the direction of the anti-magnetic float line to form the entire rotor suspension orbit. The advantages are quiet and relatively long life. The disadvantage is that the price is expensive and the popularity is not great.

Single ball fan

The single ball fan is a combination of sliding friction and rolling friction. It is actually a combination of a ball bearing and an oil bearing. This kind of fan is inexpensive, and it overcomes the short life of the oil bearing and has a long service life. However, the disadvantage of the single ball fan is that the noise increases.

Double ball fan

Double ball fans are second only to magnetic levitation fans. Due to the double-layered ball structure, there is no oil leakage problem, and the airtightness of the bearing is not easy to be worn out. Therefore, its life span is the highest. Many violence fans use dual ball bearings, and their disadvantages are also quite fatal: they are very noisy.

The combination of wind volume, wind pressure and love CP

No matter which kind of technology fan, in fact, the current through the control circuit, in the stator coil and the electromagnet place to generate a rotating magnetic field, to promote the rotation of the rotor on the magnet in a specific direction, thus driving the entire blade at high speed, to promote the air quickly from Passed at the blade, has reached a certain amount of wind and wind pressure. What are these two?

The wind pressure is the pressure of the wind. The greater the wind pressure, the greater the force of the wind, and it is easier to blow the components such as the chassis punching and the dustproof net. The air volume can be understood as the amount of air flow through the fan at the same time. At the same time, more air can be exchanged to improve the cooling effect. However, the relationship between wind pressure and air volume is relative. At the same speed, the higher the wind pressure of the fan is, the smaller the air volume is, and vice versa.

In addition, the fan blade tilt angle and blade curvature to a large extent will affect the wind pressure value of a fan. The larger the blade tilt angle and curvature value, the greater the wind pressure at the same speed. As long as the rotational speed is controlled, this type of fan is very suitable for use on the front panel of the chassis (general chassis fan is recommended to select a silent fan with 800 rpm). .

Fans with large air volume are more suitable for use on the rear of the chassis to make fans. So if it is a desktop computer installed cooling fan, do not think that buy one-on-one exactly the same, it is best to distinguish.

Different voltage, the fan is different

Fans are not only different in appearance size, such as specifications of 80mm, 92mm, 120mm, 140mm, or even 200mm. Fans also differ in voltage. At present, the cooling fan is mainly divided into two voltage specifications of 5V and 12V. The common CPU and video card fans are 12V, and the chassis fan is also the same. The notebook heatsink needs to be powered by the USB interface, so the basic use of 5V fans. So, when buying a fan for your computer, be sure to think about where you are.

Last but not least, when the computer is equipped with a cooling fan, Xiao Bian recommends to buy a silent fan. Generally, a bearing fan with a diameter of 1200 turns or less can be used. Pay attention to the blade, the lower the angle of inclination, the lower the noise. Unless there is a special need, it is not recommended violence fan (double ball + 4000 rotation speed), that noise is simply driving a tractor ... ...