The main function of the cooling fan is to solve the problem of excessive heat in the operation of various mechanical equipment, electronic equipment, frequency converter, etc., and ensure that the equipment has a moderate temperature working environment, so the cooling fan has a decisive role.
Classification and characteristics of cooling fan:
1. Mixed flow fan:
Mixed flow fan is also called diagonal flow fan. At first glance, there is no difference between mixed flow fan and axial fan. In fact, the inlet of mixed flow fan is along the axis, while the outlet is along the diagonal direction of axis and vertical axis.
Characteristics: due to the conical shape of blade and cover of mixed flow fan, the wind pressure is higher. Compared with axial flow fan, centrifugal fan has lower noise, so it has high flow rate and relatively high wind pressure.
2. DC cooling fan:
Through DC voltage and electromagnetic induction, DC cooling fan is transformed from electrical energy into machinery to drive the wind blade to rotate. Its technology and performance have reached a mature stage, and new technologies are emerging. At present, DC cooling fan has been widely used in computer, communication products, medical equipment, heater, air conditioner, inverter, teller machine, welding machine, audio equipment, environmental protection equipment, refrigeration equipment and other industries.
Features: strong operation stability, good heat dissipation effect and long service life.
3. Axial fan:
The blades of an axial fan push air in the same direction as the shaft. The impeller of axial-flow fan is similar to propeller. When it works, most of the flow direction is parallel to the shaft, in other words, along the axis direction. When the inlet air flow is free air with zero static pressure, its power consumption is the lowest. When it is running, the power consumption will increase with the rise of air flow reverse pressure. Therefore, it is usually installed in the cabinet of electrical equipment, and sometimes integrated into the motor.
Features: it has high flow rate and medium air pressure. Because of its compact structure, it can save a lot of space and is easy to install, so it is widely used.
4. Centrifugal fan
When the centrifugal fan works, the blades push the air to flow in the direction perpendicular to the axis (i.e. radial direction). The inlet air is along the axis direction, while the outlet air is perpendicular to the axis direction. In most cases, the cooling effect can be achieved by using an axial fan. However, if the air flow needs to be rotated 90 degrees or the air pressure is large, centrifugal fan must be selected. Strictly speaking, fan also belongs to centrifugal fan.
Features: limited flow rate, high wind pressure.
At present, there are many brands of cooling fans in the market, and the quality is uneven. The heat dissipation problem directly affects the quality of the terminal products. If you want to find a reliable fan, please recognize Shandong Hongbao electric. Shandong Hongbao Electric Co., Ltd. provides all kinds of fans with complete models and reliable quality.