Cooling fan can be used in computer cooling, automobile cooling, industrial production, in addition to cooling fan can also be used in communications equipment, purifier industry, UPS power supply, medical equipment and many other industrial fields.
The working principle of cooling fan is realized according to the energy conversion, namely: electrical energy → electromagnetic energy → mechanical energy → kinetic energy. Its circuit principle is generally divided into a variety of forms, the use of different circuits, the performance of the fan will be different.
Technical indicators
1, air volume
Air volume refers to the total volume of air discharged or incorporated into the cooling fan per minute, if calculated by cubic feet, the air volume unit is CFM; if calculated by cubic meters, it is the CMM. cooling fan is often used in the unit of air volume is CFM (about 0.028 cubic meters / min).
Airflow is the most important indicator of a cooling fan's ability to dissipate heat. Obviously, the higher the airflow, the higher the cooling capacity of the cooling fan. This is because the ratio of the heat capacity of air is certain, a larger air volume, that is, more air per unit time can take away more heat. Of course, the cooling effect of the same air volume is related to the way the wind flows.
2, wind pressure
Wind pressure and air volume are two relative concepts. Generally speaking, in the manufacturer's cost-saving considerations, to design a fan with a large air volume, we have to sacrifice some air pressure. If the fan can drive a lot of air flow, but the wind pressure is small, the wind will not blow the bottom of the radiator. Conversely, high wind pressure often means that the air volume is small, there is not enough cold air to heat exchange with the heat sink, which will also result in poor heat dissipation.