Fan 307525

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Cooling fan work principle

The working principle of the radiating fan is achieved by conversion of energy, namely: the electric energy → electromagnetic energy → mechanical energy → kinetic energy. The principle of the circuit is generally divided into a variety of forms, using the different circuit, fan performance will be different.

The classification and characteristics of radiating fan

One, Axial flow fan

Axial flow fan blade drives air to and shaft of the same direction flow. Axial flow fan impeller and the propeller is similar, when it is at work, the vast majority of the airflow direction and parallel to the axis, in other words means along the axial direction. Axial flow fan when the entrance flow is 0 static pressure free airs, the lowest power consumption, when running with the air back pressure rising, power consumption will increase. Axial flow fan is usually mounted on the electrical equipment cabinet, sometimes also integrated in motor, as a result of axial flow fan has the advantages of compact structure, can save a lot of space, convenient installation, thus obtained the widespread application.

Its characteristics: high flow rate, medium wind pressure.

Two, centrifugal fan

When centrifugal fan work, blade push the air with axis perpendicular to the direction of flow (i.e., radial), intake is along the axial direction, and the air outlet is perpendicular to the axial direction.

In most cases, the use of axial flow fan can achieve cooling effect, however, sometimes if required airflow rotated 90 degrees to discharge or require larger pressure, must use of centrifugal fan. On the fan strictly speaking, also belongs to a centrifugal fan.

Its characteristics: limited flow rate, high wind pressure.

Three, mixed flow fan

Mixed flow fan is also called diagonal flow fan, look at first, mixed flow fan and axial flow fan is nothing different, in fact, mixed flow fan inlet is along the axis, however, outlet is along the axis and the vertical axis of the diagonal direction. Because of the fan blade and a cover of said conical, thus causing high wind pressure, in the same size and other comparable performance, compared with the axial flow fan, centrifugal fan noise is lower.

Its characteristics: high flow rate and relatively high wind pressure.

Four, cross flow blower

Through flow type air flow can produce large area flow, usually used for cooling equipment of large surface. The fan inlet and outlet are perpendicular to the axis. Cross flow fan is the use of a long cylindrical fan impeller was working, the cylindrical blades are relatively large caliber, because of large caliber, and in order to ensure the overall rate of air circulation based on the use of relatively low speed, thus, decreased due to high speed running can bring the noise.

Its characteristics: low flow rate, low pressure.

 

The application of cooling fan

Widely used in computers, communications products, photoelectric products, consumer electronics products, automotive electronics, medical equipment, heater exchanger, air conditioners, inverter, automatic teller machines, car refrigerator, welding machine, induction cooker, audio equipment, environmental protection equipment, refrigeration equipment and other traditional or modern instruments and equipment.

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