The stand or fall of heat dissipation dc cooling fan diagnosis

Now on the market more and more heat dc cooling fan, large and small, have a few centimeters to several millimeters, the style is numerous, so as to adopt, and how to judge the stand or fall of the dc cooling fan? Went up from bearing observation: because of the bearing can be divided into two kinds of ball bearings and oil bearing. Ball bearing service life is long, the noise is small, but the price is more expensive. The service life of oil bearing a third shorter than ball bearings, use, over time, is likely to happen some noise, but the price is cheap. If some ball bearing of the cooling fan with the price of oil price is the same as the cooling fan, explain the ball bearing must be old is definitely defective goods, cheap goods is not good, after all, recommended manufacturers don't greedy betting margin. In the new bearing ( In addition to the clear oil bearing) Life won't have more than ball bearings, but also in the later use have noise. 2, went up from the sound diagnosis: hear the wind, Some high speed may have electromagnetic acoustic) , if there are other voice shows its quality is not very good. If heat dc cooling fan speed is not very high as 7 cm cooling fan of no more than 3500 RPM, but the wind that the poor quality of the cooling fan. 3. Visually observed: look from the dc cooling on the cooling fan surface should be overall thick, color is pure, Especially in black, with the color of the cooling fan is not important) , at the edge of the box leaves no burrs, see the thickness of the heat dissipation dc cooling fan blades, with the hand to knead frame without too much deformation. 4. From packing parameters to diagnose: the better, the parameters, the better, the quality, of course, there would be no bad to go there voltage: 5 v12v24v48v in 7, 8 cm heat dc cooling fan speed does not exceed 3500 RPM without other function parameters. From the cooling fan running time observation: after let heat dc cooling fan operation, seize the cooling fan feel it vibrate with the hand, and different point of view, the feeling is the same for the cause that the vibration of the cooling fan is very good, if there are vibrations, may produce a total shock, in case some people before a loud sound when the phone is switched on mainly the cooling fan starts shaking. 6, from the operation after a period of time to diagnose: the condition of electricity to its rotation after a period of time. Prevent its heat dissipation dc cooling fan rotation with the hand, hand over the center of the blades feels its temperature, if the high temperature is not qualified to prevent heat dc cooling fan in the die was burned down and cause a fire. 7. Choose from the brand: brand good heat dissipation dc cooling fan, general quality are guarantee, such as: YiRongChuan, so to heat dc cooling fan is an important guarantee of quality. Because of the sentence as the saying goes: 'everyone good is really good. 。 。 Above is some diagnostic methods of the stand or fall of heat dissipation dc cooling fan, radiator cooling fan knowledge, more can focus on my company's official website, professional solution for you some radiator cooling fan common problem processing method. Wen ling chi car air conditioning cooling cooling fan manufacturers, professional provide radiator cooling fan, cooling fan, radiator dc cooling fan, blower and various specifications for industrial cooling dc cooling fan. 【 Ten years Taiwanese qualifications, two days out of the sample and price consultation: 13927478859]