There are many brands of cooling fans on the market. If people who do not know how to buy them, it is difficult to distinguish their quality. How to distinguish the quality of DC DC fans? The following editor will teach you the following points:
Frame: aluminum alloy and plastic are used on the frame, but aluminum alloy is used on ordinary AC fans and plastic is used on DC fans (1751 DC fan frame is aluminum alloy). But even the same aluminum alloy frame is also thick and thin. Moreover, the central axis inside the aluminum alloy frame is very important. Good cooling fan manufacturers all use copper central axis, while poor cooling fans generally use aluminum alloy.
Circuit board: Good heat dissipation fan circuit boards are more complicated. Of course, the materials used can be compared at a glance. There are many small parts, while poor heat dissipation fan parts are few, which is a very simple line.
Copper wire: good cooling fan copper wire are relatively rough, strong, using the method of manual winding, and poor cooling fan inside the copper wire is very thin, of course, only for the same product comparison, the smaller the fan, the thinner the copper wire will be. The thick wire, while the poor wire is only one, very thin and simple.
Wire: The wire in a good cooling fan is made up of many thin wires interlaced together to form a cooling fan quietly. As an electronic parts industry that will not decline, cooling fan manufacturers are also everywhere, and the quality is of course mixed. We can examine the quality of the cooling fan from two aspects, one is whether the parameters of the cooling fan can meet the standards, and the other is whether the external data of the cooling fan can be of high quality. The parameters can be tested, and the data can only be seen through professional examination.
Ball: This introduction is more, just remember, the ball is much better than the oil.
The material of the fan blades: it is also easy to distinguish. The stator of a good cooling fan is usually a medium steel stator, which is very strong.
Motor diameter: Due to the existence of the motor and bearings, the center of the DC DC fan spindle must have no air flow through the blind area, and the diameter of the spindle will determine the size of this blind area. A large number of spindle diameter mainly depends on the power of the fan motor-the stator winding coil with large power demand of the motor must occupy more space, in the absence of longitudinal contraction (increase height), and then the necessary degree of contraction (increase area).
Blade radian: In addition to a certain curvature in the cross section, the blades of the DC fan do not extend vertically in the radial direction on the overhead plane, but extend slightly in the direction of rotation.
You have made a clear distinction between the above, so it is no problem to choose a high-quality DC fan. You can definitely choose a fan that you like.