The air circulation per unit time is divided into air supply volume, fresh air volume and other subdivisions. The air supply volume is used to indicate the capacity of ventilation equipment such as blowers, and the unit is cubic meters per second.
because of its large volume, the fan air volume can reach tens of thousands of cubic meters per hour. China's national standard GB/T1883-22 stipulates that the fresh air volume should not be less than 3m 3/h.
if calculated in cubic feet, the unit is CFM；; If calculated by cubic meter, it is CMM, and the air volume unit often used in radiator products is CFM.
Extended data:
Under the condition of the same radiator material, air volume is the most important index to measure the heat dissipation capacity of air-cooled radiator. Obviously, the larger the air volume, the higher the heat dissipation capacity of the radiator.
This is because the heat capacity of air is constant. The greater the air volume, the more air can take away more heat per unit time. Of course, the heat dissipation effect is related to the wind flow mode under the same air volume.
during inspection, the fan should be set at the breeze level, and when the rated voltage of the power supply is 85%, that is, when the voltage of 22 volts is reduced to 187 volts by the voltage regulator, the fan should be able to start from a standstill and run normally. The shorter the time required for an electric fan to start to run normally, the better the starting performance of the fan motor.
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