[Did You Know About Cooling?] Teaching You How to Choose a Good DC Fan
Category:
Industry Trends
Release time:
2019-03-27
As the economic living standards of people in our country continue to rise, DC fan Its applications in our daily lives are becoming increasingly widespread, which is also driving the proliferation of numerous... DC fan The primary reason for choosing a supplier—so, among so many suppliers, how do we go about selecting a good DC fan?
1. Bearing Selection: Generally speaking, DC fan bearings fall into two main categories: one is the ball-bearing type, collectively referred to as ball bearings; the other is the oil-lubricated type, collectively referred to as oil-bearing bearings. The key difference between these two types lies in their performance characteristics: ball bearings offer a longer service life and lower noise levels, but they come with a higher price tag and stricter requirements. On the other hand, oil-bearing bearings have a service life that’s about one-third shorter than ball bearings. After a period of use—typically more than a year—they may start producing some noise—but they’re significantly cheaper.
2. Choose based on appearance: From an external perspective, the product should feel generally sturdy and thick; its color should be pure (especially black—this is less important for colored fans). There should be no frayed edges along the blade’s perimeter. Pay close attention to the thickness of the blades (this is extremely important, as blades that are too thin are prone to breaking). When you gently pinch the outer frame with your hand, it shouldn’t show much deformation.
3. When you hear the sound of the fan (some high-speed fans may produce electromagnetic noise), any other unusual sounds indicate that the fan’s quality isn’t very good. If a DC fan isn’t running at very high speed—say, a 7-centimeter fan rotating no faster than 3,500 RPM—but still makes a loud whirring noise, it’s a clear sign that the fan’s quality is poor.
4. Check the specifications on the outer packaging: The following two parameters are provided for your reference: Voltage: 5V, 12V, 24V, 48V; Current: Operating current less than 250mA (a current exceeding 250mA indicates that the product is non-compliant).
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Next: [Did You Know About Cooling?] What are the fan protection tests?
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