Cooling system fans have been used to cool electronics for a long time. However, the recent trends of changes in electronic devices call for an evolved electronic cooling fan which can effectively dissipate heat in electronics that have even more power in smaller packages. Heat production in much equipment continues to rise as compact consumer electronics products increase in power and functionality. Though the size of electronics may be small, the amount of heat generated can be enormous. A few examples of this case are: laptop computers with powerful processors, projection systems in which heat is generated by the light source, and even set-top boxes. To generate air flow around heat generating components in electronic equipment and to dispel heat effectively requires active cooling with the help of fans.
Typically, there are two types of electronic equipment cooling fans that are frequently used: radial blower fans and axial fans. The main difference between these two types of electronic cooling fans is in their pressure and flow characteristics. Electronic fans like radial blowers move air vertically to the blower axis and provide low flow rates against high pressures. Conversely, axial fans move in parallel to the axis of the fans offering a configuration of high flow rates with low pressures. To find the right electronic cooling fans for your applications and to select the best electronic cooling fans, obtain an accurate estimate of the heat that needs to be dissipated and check the cooling requirement which is most appropriate to your electronic application. Sometimes, combining fans in parallel or series blowing air side by side or stacked one upon another can help achieve the desired airflow without increasing the size or fan diameter. This can potentially double the flow rate volume and can best be used in electronic systems that have low resistance and need more cooling. However, the combined performance curve of multiple fans could be unstable, leading to unpredictable behavior of the cooling fan, motor construction, or the operating point. Always check if you system can handle multiple fans.
When looking to dissipate heat in your equipment with a fan, you should ensure that the fan that you select provides:
Some of the custom features in electronic equipment fans include variable speed and flow, over temperature protection (causing the power supply to be turned off automatically if critical temperatures are exceeded), fault detection, and a locked rotor.