Rotating speed:

     The rotational speed is one of the fundamental determinants of the performance indicators of the fan. The unit of the fan rotational speed is RPM. The manufacturers in my country generally express it in r/min. . The fan speed is related to the number of fan blades, the number of coil turns in the motor and the working voltage, etc., and is not necessarily related to the quality of the fan.

Air volume:

           The air volume is the most important indicator used to measure the cooling capacity of the cooling fan. The air volume refers to the total volume of air discharged or incorporated by the cooling fan per minute, and CFM (cubic feet per minute) is generally used as the air volume unit. The larger the air volume, the higher the heat dissipation capacity of the cooling fan. Under the same air volume, the heat dissipation effect is also related to the flow of the wind.

Air pressure:

          Wind pressure and air volume are relative concepts. In order to make the wind room have a larger air volume, sometimes it is necessary to sacrifice some wind pressure to complete it. If a cooling fan can drive a large amount of air flow, but the wind pressure is small, the wind will The bottom of the radiator cannot be blown, so we often find that some fans in our daily life have high speed and large air volume, but the heat dissipation effect is not particularly good, because the wind pressure is low.