An axial fan in general, whether DC axial fans or otherwise, is the most commonly used variety of cooling fan, as well as the most cost effective. Also called 'box fan' on occasion, they move air on a straight axis through the fan. This kind of fan functions best under a low pressure or low system impedance environment. With reduced fan speed the noise produced by an axial fan can be kept at a minimum. Because of this low level of audible noise, as well as their economical price range, this kind of fan is extensively used in PCs, for both CPU and power supply cooling.
Axial fans blow air along the axis of the fan, or parallel to the track of the blade axis. Standard DC Axial fan sizes include 60mm, 70mm, 80mm, 92mm and 120mm. The amount of airflow that a fan generates is measured in cubic feet per minute (CFM), and the rotational speed in revolutions per minute (RPM). Static pressure is measured as inches of water (H2O). DC axial fans are found in a variety of applications, including computing, servers, telecommunication cabinets, and any type of equipment where the need for thermal control is necessary for the improved reliability and life extension of the components that are included in the system.
Uncontrolled heat generated by electronic devices will not only decrease the performance of any system, but will ultimately lead to complete system failure. In order to prevent this catastrophe from occurring, it is imperative that your equipment be designed with an efficient cooling system in mind. This system will not only be crucial to heat dissipation but will also contribute to the stability and long life of the equipment itself. This is where a DC fan with a well designed cooling path becomes one of the most important components of any equipment. Heat dissipation for the prevention of premature failure is by far the most crucial part of any electronic system design, and a DC fan is one of the best tools available to keep your electronic devices performing at top operational shape.
When it comes down to it, different systems require different types of axial fans. Some require AC while others require DC. So although there are differences between the two, you need to make sure you purchase the correct type. But, in case you were curious how AC fans differ to DC fans, here are a few historical and current points.
In essence, DC axial fans direct heat outside of a motor, keeping your CUP running at an optimum level.