For the computer, the chassis fan is indispensable. It can solve the problem of computer cooling. If the computer's poor heat dissipation may cause the computer to crash, crash, etc., how to buy the computer chassis fan ? How to install a computer chassis fan? The following decoration home decoration network Xiaobian will bring you the computer chassis fan selection skills and installation methods for your reference.
How to buy a computer chassis fan?
1. Look at the air volume: The air volume is one of the most basic indicators. It is not limited by the size structure, etc. It refers to the air volume passing through the wind area per unit time. The air flow area is basically equal to the fan outer frame area minus the motor part inner frame. area. The air volume is generally expressed in CFM (cubic feet per minute), and a few people will use m3/min. The fan volume of 12cm is more than 30-80CFM. Obviously, when the average wind speed is constant, the larger the diameter of the fan, the larger the area of ​​the wind, the larger the air volume, and the more air that participates in heat exchange. In most cases, the heat dissipation effect is more obvious. But blind pursuit of the wind is also not desirable, because there is also a "wind pressure" closely related to us to worry.
2, look at the wind pressure: If the air volume refers to the total amount of air involved in heat exchange per unit time, then the wind pressure determines the location where these air can reach. Accurately speaking, the wind pressure is the pressure difference between the air outlet and the air inlet. Generally speaking, the wind pressure defines how far the wind energy can be blown. Because the pressure difference described by the wind pressure is relatively small, the water column is generally used. That is, mmH2O (millimeter water column), the wind pressure of the 12cm fan is mostly between 0.3-1.0mmH2O. The wind pressure depends mainly on the shape, area, height and speed of the fan blade. The influence of the first three is more complicated, and the relationship between the speed and the speed is very simple. Under the same conditions, the faster the speed, the greater the wind pressure.
3, look at the speed: the speed refers to the number of turns of the blade in each minute, the unit is rpm (revolutions per minute), the speed of the fan has a huge impact on the performance of the fan, usually the higher the speed of the wind, the wind The pressure is higher, but the noise is also greater. The fan speed is determined by the motor, operating voltage, number of fan blades, inclination, height, diameter, and bearing system. Most of the fan speeds can be adjusted, because their speed will change synchronously with the change of working voltage. The commonly used governor is just a small varistor, and the air volume / wind pressure Different, the speed can be viewed by simple instrument measurement or software. The speed of a 12cm fan is generally 800-2000rpm.
4. Look at the noise: The fan noise is a noise generated when the fan is working. At the same time, the noise is also a direct influence on the user. The noise level is affected by many factors, such as speed, fan size and number. The nominal fan noise value is measured in a muffler room with noise less than 17dB, 1 meter away from the fan, and aligned with the fan in the direction of the fan shaft. The air inlet is carried out in an A-weighted manner. Generally, the noise of the fan should be as small as possible, and there should be no abnormal sound. Inferior fan, the center of gravity of the fan blade is not on the axis. After a period of use, the fan bearing gradually wears out, which will increase the vibration and increase the noise.
5, look at the fan blade: the design of the fan blade plays a decisive role in the performance of the fan. The technical foundation of the manufacturer is mostly expressed by various fan blades. There are several main parameters of the fan blade that affect the air volume of the fan. Wind pressure and wind speed. The greater the curvature of the blade, the greater the wind volume and wind pressure, and the greater the resistance of the blade. The torque of the motor is required to be larger. The larger the blade inclination angle (the angle with the airflow direction), the larger the wind pressure, but the reflow phenomenon may occur. To reduce the fan performance; if the blade pitch is too small, the airflow will be disturbed, the surface friction will be increased, and the efficiency will be reduced. If the distance is too large, the pressure loss will increase and the wind pressure will be insufficient; the blade curvature can make the blown airflow concentrate in the columnar space directly in front of the air outlet. Increase wind pressure.
How to install a computer chassis fan?
1. Installation: The side panel with holes sees the wind blowing in the 4 jacks, and the rear of the 2 jacks (that is, the hardware board behind the chassis) draws air outward.
2, wiring: 4 jacks directly plug in the power supply wiring, if the 2 jacks are also large plugs, plug directly into the power supply, small to connect to the motherboard, see the pin is corresponding, you can plug directly into the problem .
3, adjust the speed is simple, see your chassis with no fan speed controller, with the case, the chassis is connected to the governor's plug-in cable, the corresponding plug-in line above the power cord, one connected to the fan, the chassis with the instructions If you do not have a manual, you can directly wire it. The power that does not cause problems is 12V. 6V, 3V will not appear as an electric phenomenon.
The above is how to buy the computer chassis fan that Xiaobian brings to you? How to install a computer chassis fan? I believe that everyone has a basic understanding of the computer chassis fan after reading this article. If you want to know more about decoration consultation, please click to enter the decoration knowledge channel.
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