Square centrifugal duct fan

DBFSquare centrifugal duct fanworking principle

The impeller is installed inside the volute 4. When the impeller rotates, gas is sucked in axially through the inlet 2, and then the gas is bent about 90 ° and flows through the passage formed by the impeller blades (referred to as the blade passage). The volute concentrates and guides the gas thrown out by the impeller, and discharges it from the ventilation fan outlet 6 or outlet diffuser 7.

The working principle of a centrifugal fan is known to be that the flow of gas in the fan is first axial, and then transformed into radial motion perpendicular to the axis of the ventilator. When the gas passes through the blade passages of the rotating impeller, due to the action of the blades, the gas obtains energy, that is, the gas pressure increases and the kinetic energy increases.

When the energy obtained by the gas is sufficient to overcome its resistance, it can be transported to a high or distant location. The impeller and casing of centrifugal fans are mostly welded or riveted with steel plates.

Its rotational speed is relatively low, generally less than 3000 revolutions per minute, and the production batch is large. In order to facilitate production and maintenance, rolling bearings are mostly used in the design.

Because these types of duct fans have not undergone sound insulation treatment, there will be a certain amount of fan noise. The outer layer of the high-quality centrifugal duct fan adopts soundproof panels with sound insulation effect as the box body. Compared to ordinary centrifugal fans, it has lower noise and is suitable for use inside buildings. Square duct fans can also be equipped with noise reduction devices to further reduce fan noise. You can also install filters and turn them into filtering fans to purify the air.

Nowadays, the application of centrifugal duct fans (square) is becoming more and more popular, and the technology is also becoming more and more mature. Square duct fans can be found in various large buildings.

Square centrifugal duct fanThe advantages are mainly reflected in the following aspects:

Structural design and installation convenience: The square centrifugal duct fan adopts a square design, which is compact in structure and easy to directly connect with the square duct, greatly simplifying the design and manufacturing process of the duct. The installation process is relatively simple and fast, reducing construction time and costs.

Good performance: The square centrifugal duct fan adopts a front curved multi wing centrifugal impeller design, which has the characteristics of high air volume and low noise, ensuring efficient airflow exchange while reducing operating noise, providing users with a more comfortable operating environment. In addition, the high-performance motor it is equipped with has the characteristics of low temperature rise, low noise, fast start-up, smooth operation, and low vibration, ensuring low power consumption and high efficiency operation.

Wide applicability: Square centrifugal duct fans are suitable for various fields, including industrial and mining enterprises, civil buildings, sports venues, animal husbandry, and various entertainment venues, which can significantly improve the air quality of these places. Its material properties of corrosion resistance and high temperature resistance enable it to operate stably even in harsh environments.

Convenient maintenance and upkeep: The outer shell of the square centrifugal duct fan is equipped with an inspection door, which facilitates the maintenance of the motor and impeller, improves maintenance efficiency, and extends the service life of the fan. Its small size and motor design make it easy to clean, allowing users to easily maintain the cleanliness of the fan.