Axial fans are made out of relatively simple parts, but the engineering that goes into them can be very advanced. For example, subtle differences between one fan and the next, such as a different orientation of the blades, can drastically change airflow or and other qualities.
The basic parts include the motor, which rotates the shaft and, in turn, the blades. The fan, shaft and the blades are contained within housings, generally with guards to protect against having a body part enter or someone actually falling into the spinning blades. Electronic switches and sometimes digital interfaces are used to control the operation of most fans.
Fans designed to be mounted in computer cases, windows and walls usually have a design that includes extra material used for that mounting. Most computer fans, for example, have holes tapped on the edges of them so that they can be fit into computer cases if extra cooling needs to be added for a machine.
The blades on axial fans are highly engineered products, but the other parts are generally very durable and not particularly expensive. Electric motors, for example, are reliable, efficient and long lasting, in addition to being inexpensive. Axial fans are used in many different applications, and different applications call for different features and different designs.
Axial fans can be made in very compact designs. This makes them ideal for cooling not only computer cases, but actually coolingspecific components within a computer case. For example, processors and video cards oftentimes have their own axial fan cooling system built into them, given the enormous amount of heat that such components can produce.
Where the blades are concerned, they can be made so that they are pointed toward the rotation of the fan, against the rotation of the fan or axially to the rotation of the fan. This impacts airflow and sophisticated systems have to take this into account. For applications such as everyday box fans or other household fans, it may not make a great deal of difference.
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