The thinner the cooling fan, the thinner the bearing, and the smaller the contact area between the bearing and the shaft core. The high-speed rotating fan blades drive the shaft core to rotate and rub against the bearing. If the bearing is rough, the fineness is not enough. The noise when the bearing and the shaft core are rubbing. Often due to the problem of space, we need to use a thinner cooling fan, do this choice will deal with the problem of space, will bring other problems.
1. Cost, it is likely that the ultra-thin cooling fan is more expensive than the thicker one with the same shape, due to the higher level of difficulty in consumption.
2. Air volume, air pressure, thinner cooling fan, power is smaller than thicker, air volume will be smaller, barely as big, cost may be higher.
In the choice of thickness, of course, is to choose a medium thickness of the cooling fan, the cost is higher, the structure is relatively more stable, such as 10MM,25MM this thickness is very commonly used.
For some special places, the temperature in the center of the cooling fan is very high. I hope the cooling fan can withstand high temperature and heat dissipation. Then, how much temperature can the cooling fan withstand.
The working temperature of the cooling fan for ordinary regular is -10-70 degrees. If the temperature is higher than 80 degrees in a special environment, special design is required. High temperature resistant IC is used and the current of the motor is reduced to lower the temperature of the motor itself. In addition, enameled wires, plastic materials and wires should also be high temperature resistant, and the temperature cannot exceed 100 degrees.
When the temperature is too high, whether it is a high-temperature cooling fan or an ordinary cooling fan, the life will be greatly reduced. Therefore, when designing products, the ambient temperature should be controlled below 70 degrees as much as possible.
Under the condition of the same heat sink material, the air volume is the most important indicator to weigh the heat dissipation ability of the air-cooled radiator. Obviously, the greater the air volume of the radiator, the higher the heat dissipation ability. This is because the heat capacity ratio of air is certain, and more air volume, that is, more air per unit time, can take away more heat. Of course, the heat dissipation effect is related to the activity mode of breeze under the same air volume.