Longyu Duct Fan

Company Background
Longyu duct fans generally refer to the fan products manufactured by Dezhou Longyu Air Conditioning Equipment Co., Ltd. The company offers a wide variety of products and has left a favorable impression on users in numerous domestic construction projects.
Product Features
Superior Performance: Designed with airfoil-shaped backward-curved impellers and other features, these fans achieve a high energy efficiency ratio of up to 70%. They can deliver maximum airflow with minimal motor power, provide high wind pressure, and support centralized ventilation through ducts spanning dozens of meters.
Smooth Operation: The fans operate without vibration, with a dynamic balance value of less than 0.17g. The imported metal or PP plastic impellers are molded based on airfoil design, offering high rigidity, heat resistance, environmental friendliness, and large airflow capacity, while also reducing noise to some extent.
Reasonable Structural Design: For example, the GDF-type rectangular centrifugal duct fan features a compact structure, allowing direct connection to air ducts for easy installation.
Low Noise: The specially designed housing significantly reduces external flow noise. Under conditions of unit air volume and unit wind pressure, the A-weighted sound level can be reduced by 2-3 dB(A).
Working Principle
Centrifugal Duct Fan: Driven by an electric motor, the impeller rotates, drawing air axially into the impeller from the inlet. Under centrifugal force, the air is thrown to the periphery of the impeller, flows along the volute, and is discharged from the outlet after a decrease in speed and an increase in pressure.
Axial Duct Fan: The impeller is parallel to the motor shaft. During rotation, air enters the impeller axially from the inlet and flows axially under thrust force. After gradual changes in speed and pressure, it is discharged from the outlet.
Application Scenarios
Civil Buildings: Widely used in hotels, office buildings, shopping malls, hospitals, restaurants, exhibition halls, and other spaces to meet indoor ventilation, air exchange, and duct pressurization needs, providing a comfortable environment for people.
Industrial Sites: In environments such as factory workshops, these fans can be used for ventilation and exhaust to maintain a good working environment, as well as for smoke extraction in case of fire.
Other Fields: Also applicable in ovens, underground garages, tunnels, subways, and other settings to achieve ventilation, air exchange, and smoke extraction functions.