Centrifugal fans are a type of mechanical device used to move air or gases in various applications. They are characterized by their ability to generate a high-pressure airflow by converting the input energy into kinetic energy. The fan consists of a motor, an impeller, and a housing. The motor is powered by a DC supply, typically provided by a battery; that's why also named DC centrifugal fan.
These fans are commonly used in applications where space is limited or low power consumption is desired, such as in electronic cooling, HVAC systems, automotive cooling, and ventilation systems. This feature makes them suitable for applications that require adjustable airflow or where energy savings are desired.
Three primary types of centrifugal fans are based on their blade orientations and housing designs. These types include:
Forward-curved centrifugal fans, also known as radial fans, are designed with blades that curve in the direction of the fan's rotation. These blades are typically shallow and have a gradually increasing curve from the hub to the tip.
This design allows for high efficiency at lower speeds and relatively low noise levels. Forward-curved fans are suitable for applications that require low to medium airflow with relatively low pressure, such as residential HVAC systems and cleanroom environments.
Forward-curved fans are often compact, making them suitable for installations with limited space. Their compactness allows for easy integration into various equipment, such as air handling units, compact ventilation systems, or cooling systems in electronics.
Backward-curved centrifugal fans, also called backward-inclined fans, have blades that curve against the direction of rotation. These blades are typically longer and more aerodynamically shaped than forward-curved blades.
Backward-curved fans can handle higher volumes of air and generate higher static pressures than forward-curved fans. Most industries use backward-curved centrifugal fans for commercial applications, including ventilation systems, industrial processes, and HVAC systems.
Airfoil centrifugal fans feature blades with an aerodynamic airfoil shape, similar to aircraft wings. This design improves efficiency and performance compared to forward- or backward-curved fans.
Airfoil fans can generate high airflow rates with high static pressures, making them suitable for demanding applications that require a combination of high volumes and high pressure, such as large HVAC systems, industrial ventilation, and air pollution control systems.
Airfoil centrifugal fans are generally more compact compared to other centrifugal fan designs. This compact size makes them suitable for installations with space constraints. They are not suitable for handling dust, particulates, or other materials that can cause blade erosion or imbalance.
However, within each type of centrifugal fan, there can be variations in blade shape, angle, and housing design to optimize performance for specific applications. Additionally, centrifugal fans can be further classified based on their mounting configurations. If you want variety in centrifugal fans, you can contact us and our team will help you confirm your order.
