How to judge of a cooling fan

Now on the market a cooling fan is becoming more and more large and small, have a few centimeters to several millimeters, many styles, so as a buyer, and how to judge the stand or fall of the dc fan? Went up from bearing observation:


because the bearing is 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 fan price and oil price is the same as the 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:


to hear the wind, Some high speed may have electromagnetic acoustic) , if there are other voice shows its quality is not very good. If the dc cooling fan speed is not very high as 7 cm fan speed does not exceed 3500 RPM, but the wind that the poor quality of the fan.


　　 3. Visually observed:


from the dc cooling fan outer surface should be overall thick, color is pure, Especially black, with the color of the fan is not important) , at the edge of the box leaves no burrs, see the thickness of dc cooling fan blades, with the hand to knead frame without too much deformation.


4. From packaging parameters to diagnose:


the better packed and parameters, the better, the quality, of course, also won't be bad to go there


voltage: 5 v12v24v48v


in 7, 8 cm dc cooling fan of no more than 3500 RPM without other function parameters. From fan running time observation:


let the normal operation of dc cooling fans, seize the fans feel it vibrate with the hand, and different point of view, the feeling is the same for the cause that the vibration of the 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 fan starts shaking.


6, from running after a period of time to diagnosis:


electricity to its rotation after a period of time. Stop their 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 dc cooling fan in the die was burned down and cause a fire.


　　 7. From the brand choice:


brand good dc cooling fans, general quality are guarantee, such as: San Ace fan, Jamicon beauty fan, kay. Because of the sentence as the saying goes: 'everyone good is really good. 。 。 The two brand in the industry have a very good application, reputation in the industry is also very good.


that is some diagnostic methods of the stand or fall of dc cooling fans, cooling fans more knowledge, can focus on my company's official website, professional for you to answer some of the cooling fan common problems processing method. Shenzhen tong chi auto is a company specializing in the production and sales of industrial cooling fan manufacturers. Has specialized technical personnel answer for you.