Do you know what makes a good cooling fan?

The cooling fan looks good at the following points:
1: Look at the current
Same speed, same voltage, 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 power consumption. The main reasons for the lower power consumption are:

<1>. The product has strong magnetic permeability

<2>. Good motor enameled wire loss

<3>. High copper content

<4>. The lubricating oil has high activity.

Cooling fancentrifugal blower fan manufacturers
2; listen to noise
The same speed, the same voltage, the lower the noise, the better the cooling fan, because the lower noise is mainly related to the fan blade, bearing, oil product, assembly structure, etc. The better the shape of the fan blade is designed, the greater the air volume and the lower the noise. This is a technical task and also a test of the ability of the technicians. The higher the accuracy of the bearing, the smaller the friction between it and the shaft core, the more accurate the size matching, and the lower the noise of course, which has a lot to do with the material of the bearing. Lower noise means less friction, longer life of bearings and shaft cores, and longer life of DC fans.

Cooling fan
3: measure vibration
Fans with the same specifications and speeds, cooling fans with low vibration are better.