Air volume refers to the total volume of air discharged or taken in by the electronic cooling fan per minute. If it is calculated in cubic feet, the air volume unit is CFM; if it is calculated in cubic meters, it is CMM. The air volume unit often used by electronic cooling fans is CFM (about 0.028 cubic meters per minute).
Air volume is the most important indicator to measure the heat dissipation capacity of an electronic cooling fan. Obviously, the higher the air volume, the higher the heat dissipation capacity of the electronic cooling fan. This is because the heat capacity ratio of the air is constant, and the greater the air volume, that is, the more air per unit time can take away more heat. Of course, the heat dissipation effect is related to the way the wind flows under the same air volume.
The speed of the electronic cooling fan refers to the number of times the fan blade rotates per minute, and the unit is rpm. The fan speed is determined by the number of turns of the coil in the motor, the operating voltage, the number of fan blades, the inclination angle, the height, the diameter and the bearing system. Speed and fan quality are not necessarily related that a micro cooling fan can have a quick speed as well as a high quality. The speed of the fan can be measured by the internal speed signal or externally.
As the application situation and the ambient temperature change, fans with different speeds are sometimes required to meet the demand. We have introduced a universal cooling fan that can adjust the fan speed, which is divided into manual and automatic.
The main function of manual adjustment is to allow users to use low speed in winter to get low noise, and to use high speed in summer to get good heat dissipation. Automatic temperature control radiators generally have a temperature control sensor, which can automatically control the fan speed according to the current working temperature - the higher the temperature, the higher the speed, and the lower the temperature, the lower the speed - to achieve a dynamic balance, thereby maintaining an optimal combination point of wind noise and the heat dissipation.