Axial fans date back to the horizontally configured windmills of Europe in the Middle Ages. The first electrically powered fans, introduced in the 1880s, were axial fans. Axial flow fans are named for the direction of the airflow they create. When an axial fan works, the blades push the air to flow in the same direction as the axis, so it is called the axial fan. An axial fan, as the name ind...

Centrifugal fans are sometimes called radial fans or centrifugal blower fans. They have a motor-driven hub which contains an impeller that discharges air into the housing and then directed to an outlet. The centrifugal fan exhausts air at an angle of 90 degrees (perpendicular to the air inlet). Centrifugal type fans mainly pressurize the air in the blower housing. Compared with axial fans, they pr...

As laptops become more powerful and compact, cooling systems are playing an increasingly critical role. Why do laptops use blowers instead of axial fans?They directly impact CPU and GPU performance, system stability, and user comfort. Why Does Cooling Matter? Though small in size, processors (CPU) and graphics chips (GPU) generate a tremendous amount of heat. Without proper cooling, laptops may ov...

In the design of underground garage ventilation systems, two common approaches are natural ventilation and mechanical ventilation. Although natural ventilation is often the most cost-effective method, it greatly impacts the overall building layout and outdoor landscaping. For instance, if a residential complex with a basement area of about 40,000 square meters adopts natural smoke exhaust and natu...

Introduction When summer heat hits, air conditioners become indispensable. Most people know that compressors and refrigerants are the “heart” of air conditioning systems, but few realize that air fans play an equally important role. Cooling efficiency, noise levels, and energy consumption all depend heavily on fan selection. So, why do most air conditioners use axial fans instead of blowers? Let’s...

In the world of cooling and ventilation technology, innovation never stops. Whether you are designing industrial machines, home appliances, or precision electronics, choosing the right type of blower fan can make all the difference in performance, noise level, and energy efficiency. In recent years, brushless blowers—especially brushless DC fans (BLDC fans)—have become increasingly popular across ...

A three-wire DC fan is commonly designed to provide power and functional control with minimal wiring. Knowing the role of each wire, understanding common color conventions, and wiring correctly are essential for device safety and fan longevity. The following explains the wire definitions, practical wiring methods, how to use PWM for speed control and tachometer feedback, manufacturer color differe...

Airflow and static pressure are the two most essential parameters of a fan, fundamentally shaping the efficiency, stability, and long-term reliability of any cooling system. Whether used in consumer electronics, industrial equipment, or home appliances, the interaction between fan performance and duct resistance determines the final operating point of the cooling system. Understanding system imped...