With the progress of the period and society, noise pollution has attracted more and more public attention. Whether it is the choice of living and working environment, or the purchase of various equipment and household appliances, people will stop thinking about silence. Most of the charging pile cabinets are placed in outdoor charging, so it is likely to be rained. How is the cooling fan, an important accessory of its cooling system, waterproof? Is there any special design?
For ordinary motors, the coil is wound on a silicon steel sheet, and the motor line diagram can be seen only by opening the buckle ring and taking out the fan blade. For the cooling fan used on the charging pile cabinet, in order to prevent the motor coil from being interfered by rain, a good way is to seal the whole coil. The coil is intact and invisible, and is covered by a black insulating cover, so that water cannot soak the coil.
Then fill the PCB circuit of the control board of the opposite motor with waterproof glue, so that the PCB board will not oxidize even when it touches water. After the two-step motor waterproof maintenance process, it is not afraid of rain, and there is no problem for the cooling fan to work in water. The waterproof grade reaches IPX7.
Many products hope to install a silent fan to dissipate heat. Therefore, the meaning is to dissipate heat well and sound quietly. How to choose such a cooling fan?
1. When we confirm the product size and specification, that is to say, the shape and size cannot be changed, then we need to make the cooling fan quieter. It is recommended to choose a cooling fan with high air volume and high air pressure. As the cooling fan with high air volume and high air pressure reaches the same air volume, the heat dissipation amount will not change, but the rotation speed will be lower. The fan of the same specification will have less friction with the air, the noise is even lower.
2. When the specifications and dimensions are not certain, we know that the same speed, the larger size of the cooling fan, the air volume will definitely be larger, so we can design the size larger, the speed lower, and insist on the air volume. The same, reduce noise.
3. When our request for heat dissipation is not high, the very simple way is to design the existing cooling fan speed lower and directly use the same model to reduce the speed to achieve the purpose of quieter. As mentioned above, the silent fan reaches the purpose of silence, and the low speed is a very important parameter.
Mute radiator purchase misunderstanding
Misunderstanding 1: the larger the fan, the stronger the heat dissipation
When DIY players buy radiators and fans for chassis, most consumers pursue larger air volume, thus choosing products with larger sizes. They mistakenly think that the larger the fan size, the greater the air volume. In DIY category, this is the case. Normally, large-size fans may obtain larger air volume at the same speed, but under the condition of obtaining the same air volume, A large-sized fan can achieve a better mute effect than a small-sized fan. So many players have a soft spot for big fan products, but this concept is a big misunderstanding.
Misunderstanding 2: ball fan is stronger than hydraulic fan
After introducing the misunderstanding of size, let's talk about fans! This talk is about the most important design link of fans-"rotor rollers". Usually, fans on the market have two designs here, namely balls and oil seals. Ball fans are relatively old. The common sense of changing sliding friction into rolling friction has been mentioned in junior high school physics, but the author does not introduce too much.
Misunderstanding 3: small turbofan poor heat dissipation
I once talked about the fan for two pages. On the third page, let's finish and continue to talk about the fan. A small fan also contains a lot of "knowledge".
Many consumers think that the "turbo" fan attached to the service device or mainstream graphics card is slag, so it should not be in the mass market today, and the sound of poor heat dissipation is still very loud. In fact, this is another big mistake. In fact, the sales volume of thinner turbofans on the market is far ahead from time to time. Small turbofans have higher speed and air volume, and the diameter of heat dissipation has also been changed from the top to the side. However, many consumers think that this kind of fan has a big hard injury, that is, the huge "noise", which is often unacceptable.