As we all know, fans have differentiated into many types according to different types of work, and each type has a different corresponding direction. This is a manifestation of mechanical specialization. There are many types of fans, including centrifugal fans, axial fans and mixed flow fans.
1. Centrifugal fan
Relying on the input mechanical energy, the machine that increases the gas pressure and discharges the gas. It is a driven fluid machine.
Centrifugal fans are widely used in:
①Ventilation, dust exhaust and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings;
②Ventilation and induced air for boilers and industrial furnaces;
③Cooling and ventilation in air conditioning equipment and household appliances;
④ Drying and selective delivery of grains;
⑤The wind source of the wind tunnel and the inflation and propulsion of the hovercraft.
2. Axial fan
It is the air flow in the same direction as the axis of the fan blades, such as electric fans, air conditioners outside the fan is an axial fan. It is called "axial flow" because the gas flows parallel to the fan axis.
Axial fans are usually used in occasions with higher flow requirements and lower pressure requirements.
The axial fan fixes the position and moves the air.
Small axial flow fan: low power consumption, fast heat dissipation, low noise, energy saving and environmental protection, etc. Because of its small size, it has a wide range of uses.
Large axial flow fan: It has the characteristics of simple structure, stability and reliability, low noise, large air volume, and wide range of functions.
3. Diagonal flow fan/mixed flow fan
The fan between the axial flow fan and the centrifugal fan, the impeller of the diagonal flow fan makes the air do both centrifugal movement and axial movement, and the movement of the air in the shell mixes the two forms of axial flow and centrifugal movement.
Combines the characteristics of axial and centrifugal fans, although it looks more like a traditional axial fan. The curved plate-shaped blade is welded to the conical steel hub. The flow rate is changed by changing the angle of the blades in the inlet casing upstream of the impeller. The casing may have an open entrance, but more commonly, it has a right-angled shape so that the motor can be placed outside the pipe. The drain shell expands slowly to slow down the air or gas flow and convert kinetic energy into useful static pressure.
Mainly used for mine ventilation and tunnel ventilation.