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Whether the cooling fan is blowing or suction, the principle of the cooling fan of the electrical cabinet!

Views: 9     Author: Site Editor     Publish Time: 2022-04-22      Origin: Site

Nowadays, distribution cabinets can be seen everywhere. For a relatively sealed cabinet, control cabinet and distribution cabinet, heat dissipation is a very important problem. How to help it discharge the heat generated by the operation of the server in a closed space through the heat dissipation system to ensure the stable operation of the system in the whole cabinet. At this time, the installation of cooling fan can solve this problem. It should be said that the cabinet cooling fan is suitable for most application environments. The cooling fan can cool the working machine so as not to affect the parts due to excessive temperature. For example, the cooling fan will be installed in the computer chassis. Moreover, the process of installing cooling fans is simple and fast. Generally speaking, the price of cooling fans on the market is not high, which greatly meets the problem of cabinet heating.

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However, in this process, many customers do not know whether the cooling fan is blowing or suction:


The following LINKWELL editor will answer for you:


There is a classic saying: axial flow fan for overall heat dissipation and blower for local heat dissipation. To put it simply, the overall heat dissipation (cabinet) exhausts the air, and the local heat dissipation (CPU) blows the air to the heat sink. The heat dissipation fan has both blowing and suction. The principle of the blowing method is to blow out cold air to dissipate the heat from the heat source body. Generally, air suction is used to improve the overall air flow, such as the electric fan and exhaust fan we usually use. For the overall heat dissipation, such as computer power supply, it is basically blown outward, not only because the outward blowing efficiency is higher, but also because if it is used for a certain part of heat dissipation, they are blown inward, because it needs to be concentrated in one direction. If the heat dissipation for a specific target is directed to the target, The heat dissipation of space is discharged outward. The air blowing shall ensure that the air blowing to the target is the cold air sucked in. The hot air shall be sucked out of the equipment without being sucked in by the radiator. The fans in the front and side plates of the cabinet blow to the inside of the cabinet. The fans at the top and rear exhaust outward. So as to achieve the purpose of circulating heat dissipation.



1. Fans can be simply classified into three categories: one is the air volume fan, the other is the wind pressure fan, and the last is the balanced fan. As the name suggests, some of the three fans have particularly large air volume, some have particularly large air pressure, and some have a little but neither. They can be selected according to the actual needs of the scene.


2. The blowing direction of the cooling fan is targeted. Cooling for a specific individual is blowing directly at the target; The heat dissipation of space is to exhaust air.



Is the cooling fan good for blowing or exhausting



The principle of blowing method is to blow out cold air to dissipate the heat from the heat source body. Generally speaking, the aluminum or copper radiator with fan is blowing, with high air pressure and higher efficiency. If it is the air duct on the chassis, direct the cold air to the chip to better heat dissipation. For example, fans such as CPU and graphics card are like this.


The ventilation method is to absorb the hot air and extract the hot air from the enclosed space. Generally, suction is used to improve the overall airflow, such as the exhaust fan on the upper or rear of the housing, just like the power fan in the chassis. At the same time, absorbing hot air will increase the temperature of the motor, and the calorific value is higher and in a high temperature environment. This exhaust type heat dissipation will lead to a shorter service life of the heat dissipation fan than that of the industrial heat dissipation fan.


Based on the specific analysis of the specific situation, the key is to form an air duct, ensure that the air blowing to the target is the cold air sucked in from the outside, and ensure that the hot air sucked out is discharged from the outside of the equipment without being sucked in again by the radiator.


Whether the chassis or electronic components, the principle is the same. You can blow and absorb air. The key is to see whether the air duct design is reasonable. Generally speaking, it is where the cold air comes in and the hot air goes out. Of course, the exhaust also needs air flow, and there will be dust deposition when it flows, but because the air flows from each part to the fan, the dust concentration will not be very large.





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