The types of cooling fan
Cooling fan, English Name: Cooling fans. The technology and performance of the cooling fan have reached a mature stage, and new technologies are emerging. Fan size from 15mm to 280mm, voltage 5V, 12V, 24V, 48V, 110V, 220V, 380V, square shape, round, olive shaped and so on.
The types of cooling fan
The working principle of the cooling fan is realized by energy conversion, that is, electric energy, electromagnetic energy, mechanical energy and kinetic energy. The circuit principle is generally divided into various forms, the circuit used is different, the performance of the fan will be different.
Edit the cooling fan classification and characteristics of this section
The blade of the axial fan pushes the air to flow in the same direction as the shaft. The impeller of an axial fan is somewhat similar to that of a propeller. At work, most of the air flow is parallel to the axis, in other words, along the axis. When the inlet air flow is 0 static pressure free air, the axial fan has the lowest power consumption, and the power consumption will increase as the air reverse pressure rises during operation. Axial fan is usually installed in the cabinet of electrical equipment, sometimes also integrated on the motor, because the axial fan structure is compact, can save a lot of space, and at the same time, convenient installation, so it is widely used. Its characteristics are: high flow rate, moderate wind pressure
Two. Centrifugal fan
When the centrifugal fan works, the blade pushes the air to flow in the direction perpendicular to the axis (the radial direction). The air inlet is along the axis direction, while the air outlet is perpendicular to the axis direction. In most cases, cooling effects can be achieved by using axial fans. However, centrifugal fans are sometimes required if air flow is required to rotate 90 degrees or require greater wind pressure. Fan strictly belongs to centrifugal fan. Its characteristics are: limited flow rate and high wind pressure
Three, mixed flow fan
Francis fan also called diagonal flow fan, at first, mixed flow fan and axial fan is not what, in fact, the inlet is mixed flow fan along the axis, along the axis and the vertical axis. However, the diagonal direction is. The fan has a higher wind pressure due to the cone of blade and cover, and the noise of centrifugal fan is lower than that of axial fan under the same size and other comparable performance. Its characteristics are high flow rate and relatively high wind pressure
Four, cross flow fan
The tubular air flow can produce large area airflow, which is usually used on the large surface of cooling equipment. The inlet and outlet of the fan are perpendicular to the axis (as shown on the right). The cross flow fan is the use of a long cylindrical fan impeller, the cylindrical blade diameter are relatively large, because of large caliber, in order to ensure the use of relatively low speed, based on which the overall air circulation, reduce the noise caused by the high-speed operation. Its characteristics are low flow rate and low wind pressure
service life of the fan bearing. The disadvantage is that the process is more complex, resulting in cost increase, but also bring higher work noise.