We can often find some parameters written on it when purchasing a cooling fan, such as: CFM, CMM and RPM. What are these three parameters that represent the performance of the cooling fan? What does it mean? Suzhou Santian Precision Mould Co., Ltd. will answer the important parameters of these three cooling fans for you.
CFM, CMM:
These two parameters are the air volume units of the cooling fan, but they are expressed differently. The so-called air volume refers to the volume of air passing through the cross section of the fan outlet per unit time. If the unit is cubic feet, the parameter is expressed in CFM. If the unit is cubic meters, the parameter display is CMM. The air volume of the cooling fan depends on the height of the custom and the size of the over-wind area.
Calculation formula: air volume = average wind speed × overwind area
RPM:
This parameter refers to the speed unit of the cooling fan. The so-called rotational speed refers to the number of revolutions of the fan blade in a unit time. Speed is one of the fundamental determinants of the performance indicators of the fan, which basically depends on the performance of the motor used by the fan. Some fans have a high speed, but the noise is also greater. The higher the RPM, the stronger the fan performance, and the greater the friction, vibration, and noise. The bearing losses are also more serious, and the motor consumes more power.
The above are the three important parameters of the cooling fan. When purchasing the cooling fan, please pay close attention to these three parameters to provide you with better help in choosing the cooling fan!
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