1 . Listen noise ------ same speed, the same voltage, the less the noise of cooling fans is better, because a low noise fan with the main bearing, oil, mounting structure and so on.

①  The better the shape of the fan blade is designed, the greater the air volume and the lower the noise,   which is more demanding than the ability of the designer!

②The  higher the accuracy of the bearing , the smaller the friction between it and the shaft core , the  more accurate the structure and size matching , and the lower the noise . This is inseparable from the selection of the bearing . At present, imported bearings are generally better than domestic bearings .

③  low noise, it shows little friction, bearings, shaft core of life will  extend long-life fan will also follow extended long ! Generally speaking, the continuous operation of the cooling fan for 60000 hours has reached the life limit! Under special circumstances, the life span can reach 100000H!

2 . See Current ------ at the same speed, the same voltage, the same air volume. A cooling fan with a small current is better. Because the smaller the current, the smaller the fan loss, that is, the lower the energy consumption

3. Vibration measurement ------ Fans of the same specification and speed, low vibration cooling fan is better, the smaller the vibration, the smoother the fan will run, the less the loss of the bearing and the shaft core, the life will be of course Longer.

The above three points are the criteria to be measured when selecting a cooling fan !

The above information comes from Dongguan Yinhai Electronics Co., Ltd. ( www.yinhaidg.com ), an enterprise focusing on fan R&D and production . Please indicate the source for reprinting!