Heat dissipation fans are widely used in traditional or modern instruments and equipment such as computers, communication products, photoelectric products, consumer electronics, automotive electronic equipment, exchangers, medical equipment, heaters, air conditioners, frequency converters, teller machines, automotive freezers, welding machines, induction cookers, audio equipment, environmental protection equipment, refrigeration equipment, etc. They are divided into different categories according to their uses, Now let's talk about the classification of cooling fans from Shenzhen!

classification

1 Axial fan

The blades of an axial fan push air in the same direction as the shaft. The impeller of an axial flow fan is somewhat similar to a propeller. When it works, most of the airflow flows parallel to the axis, in other words, along the axis. When the inlet air flow of axial flow fan is free air with zero static pressure, its power consumption is low, and when it is running, its power consumption will increase with the increase of air backpressure. Axial flow fans are usually installed on the cabinet of electrical equipment, and sometimes also integrated on the motor. Because of their compact structure, axial flow fans can save a lot of space and are easy to install, so they are widely used.

Its characteristics: high flow rate, medium wind pressure

2 Centrifugal fan

When the centrifugal fan works, the blades push the air to flow in a direction perpendicular to the axis (i.e. radial). The inlet air is along the axis direction, while the outlet air is perpendicular to the axis direction. In most cases, the use of axial fans can achieve the cooling effect. However, sometimes if the airflow needs to rotate 90 degrees to discharge or a large wind pressure is required, centrifugal fans must be used. Strictly speaking, the fan is also a centrifugal fan.

Shenzhen cooling fan features: limited flow rate, high wind pressure

3 Mixed flow fan

The mixed flow fan is also called diagonal flow fan. At first glance, the mixed flow fan is no different from the axial flow fan. In fact, the inlet air of the mixed flow fan is along the axis, while the outlet air is along the diagonal direction of the axis and vertical axis. Because the blades and cover of this fan are conical, the wind pressure is higher. Under the same size and other comparable performance, the noise of centrifugal fan is lower than that of axial fan.

Its characteristics: high flow rate and relatively high wind pressure

4 Cross flow fan

Cross flow air flow can produce large area air flow, which is usually used to cool the large surface of equipment. The inlet and outlet of this fan are perpendicular to the axis (as shown in the right figure). The cross flow fan uses a relatively long barrel fan impeller to work. The diameter of this barrel fan blade is relatively large. Because of the large diameter, it can use a relatively low speed on the basis of ensuring the overall air circulation, thus reducing the noise caused by high-speed operation.

Its characteristics: low flow rate, low wind pressure