PROJECTOR cooling fan sound big, produce more noise, more impact on normal life, then what are the reasons for making the sound big? PROJECTOR cooling fan noise we look at whether the cooling fan is using oil bearing, oil bearing is more prone to noise situation, because the bearing precision is lower, mainly rely on lubricating oil to maintain low noise, when the time is long, cooling fan will slowly produce noise, there is also a double ball bearing, with a long time, ball life at the edge, noise will also appear, in order to reduce noise, 1, you can choose the cooling fan with speed control function, reduce the speed, noise will also be reduced 2, machine cleaning fan, add lubricating oil. The above is the projector cooling fan introduced by Dong Xing Yue sound big, a good cooling fan is very important, not only to make the normal operation of equipment, but also to extend its service life, work efficiency also increased, if you want to know more about the cooling fan knowledge can follow us.