Micro cooling fan how to eliminate the noise？

"Micro Cooling Fan" at work (assuming no heat transfer with the outside room) not only did not reduce the indoor temperature, it will rise. Let us analyze a cause of temperature rise: When fans work, due to current through fan coil wire is resistance, it will inevitably produce an exothermic heat outward, so the temperature will rise. But why people will feel cool it? Fan transport the most important parts is bearing a long time the lack of oil, will generate noise such high-speed rotation. Therefore, we only need a few drops on the fan bearing lubricant, sewing machine if you do not use can be replaced. But be careful do not use oil instead, "Micro Cooling Fan" because its particles are relatively large, easy to damage the bearings. Vibration noise is also an important part of the fan noise, because loose leaf on bearings and bearing wear resulting in the gap becomes larger and so on, so only need to remove the sub-sector, the screws tight button, then so firmly fixed, it will not then shake. In addition the use of poor quality cooling fan, in the production of this type of fan due to defects in workmanship, the center of gravity may not be in the blades on the axis, the formation of "eccentric", "Micro Cooling Fan" use over time, fans "eccentric" phenomenon will become more serious, it will not only produce noise, serious damage may also CPU. In this regard, can be removed altogether, and then thread hanging from its center position, let it sink still to see which direction to put an end to sink in light grinding wheel a few times, and then tested, has been After the fan can be installed in a horizontal position and then go to.