Classification and characteristics of cooling fans

One, axial fan

The blades of an axial fan push air in the same direction as the axis. The impeller of an axial fan is similar to a propeller in that most of the flow of air is parallel to the axis, in other words, along the axis. When the inlet airflow is free air with zero static pressure, the power consumption of the axial flow fan is the lowest, and when running, the power consumption will increase with the rise of the back pressure of the airflow. Axial flow fans are usually installed in electrical equipment cabinets, and sometimes integrated into motors. Because of their compact structure, they can save a lot of space and are easy to install, they are widely used.

Characteristics: high flow rate, moderate wind pressure

Two, centrifugal fan

When a centrifugal fan works, the blades push the air to flow in a direction perpendicular to the axis (that is, radial), with the inlet air flowing along the axis and the outlet air flowing perpendicular to the axis. In most cases, axial flow fans can be used for cooling, however, centrifugal fans may be used when airflow needs to be rotated 90 degrees or when high wind pressure is required. Strictly speaking, fans are also centrifugal fans.

Its characteristics: limited flow rate, high wind pressure

Iii. Mixed-flow fans

Mixed flow fan is also known as diagonal flow fan, first look, mixed flow fan and axial flow fan is not different, in fact, mixed flow fan is along the axis of the air, but the air is along the axis and vertical axis of the diagonal direction. This type of fan has higher wind pressure due to conical blades and housings, and is less noisy than axial fans for the same size and other comparable properties. Characteristics: high flow rate and relatively high wind pressure

Four, tubular fan

Tubular airflow can produce large areas of airflow and is usually used on large surfaces of cooling equipment. The inlet and outlet of this fan are perpendicular to the axis (as shown on the right). Cross flow fan is to use a long barrel fan impeller to work, the diameter of the barrel fan blade is relatively large, because the diameter is large, in order to ensure the overall air circulation on the basis of the use of relatively low speed, so as to reduce the noise caused by high-speed operation.