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How to judge the quality of the DC cooling fan?

Many cooling fan manufacturers and suppliers don’t know how to choose when choosing a DC fan. Generally, they just find a few manufacturers and try to rotate after getting the samples. Any manufacturer’s product is cheap and choose this one. As a supplier, only the price is used as a measure of the cooling fan supplier and the quality of the fan. In fact, this standard is wrong. How to judge the quality of DC cooling fans? Today, Ruiapple ——cooling fan manufacturers professionals will teach you how to distinguish the quality of DC cooling fans.

First look at the current: the same speed, the same voltage, and the same air volume. A DC 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:

1.1 The product has strong magnetic permeability

1.2 Good loss of motor enameled wire

1.3 High copper content

1.4 The lubricating oil has high activity.

The second noise: the same speed, the same voltage, the lower the noise, the better the DC cooling fan, because the low noise is mainly related to the fan blade, bearing, oil product, assembly structure, etc.

2.1 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 technical personnel's ability.

2.2 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.

2.3 Low noise means less friction, longer life of bearings and shaft cores, and longer life of DC fans.

The third measurement of vibration: a fan of the same specification and speed, a small vibration DC cooling fan is better, a DC cooling fan is a high-speed running part, there must be vibration, and no cooling manufacturer can guarantee that there is no vibration. If a manufacturer tells you that their products do not vibrate, that is a lie. Don't believe it. The smaller the vibration, the better. The smaller the vibration, the smoother the fan will run, and the greater the loss of bearings and shaft cores. Smaller, it will also reduce oil volatilization or ball wear, and of course the life will be longer.

The above are some of the criteria used by Ruiapple cooling fan manufacturers to judge whether a DC fan is good or bad. I hope it will help you when choosing a fan.