1. Overview
The HL3-2A series low-noise energy-saving mixed flow fan is a new type of fan that is between axial and centrifugal fans. It has the characteristics of high pressure of centrifugal fans, large flow rate of axial fans, high efficiency, energy saving, low noise, and easy installation.
2. Quality level
The HL3-2A series ventilation fan has a novel design, compact structure, small size, light weight, and easy installation. Compared with old-fashioned centrifugal ventilation fans, it can save 20% of electricity. The speed is less than 2000r/min, and the noise is less than 75dB (A). When the fan is connected to the pipeline and installed in the air conditioning box, the noise is less than 70dB (A). It can replace medium and low pressure centrifugal fans below 2000Pa, widely used for ventilation and dust removal in industrial and civil buildings.
3. Structural features
The fan is mainly composed of impeller, casing, inlet collector, guide vanes, electric motor and other components. The impeller adopts twisted wing shaped blades with meridian acceleration characteristics welded to the hub, which have undergone dynamic balance verification and overspeed testing, and have good aerodynamic performance. The casing adopts a cylindrical shape and is connected as a whole equipped with a noise reduction functional air collector. The outlet is equipped with flow deflectors, which have good airflow distribution and stable pressure.
4. Manufacturing process
a. Impeller: The blades are cut and molded by cold stamping, and the hub is stretched and formed from Q235 steel plate. The impeller is welded by a special welding die and verified by a double-sided hard support dynamic balancing machine at high speed, with a balancing accuracy of G3.2 or above.
b. Wind duct: Round by a three core bending machine, flanged by a spinning machine in one molding process, with sufficient rigidity and beautiful appearance.
c. Guide vanes: all cut by plasma cutting and molded by compression molding.
d. Waterproof: When the fan is placed outdoors, a motor junction box rain cover should be installed. The rain cover should be welded to the outer cylinder to completely prevent rainwater from seeping in.
5. Parameter Range
The air volume range is 1300~130000m³/h, and the total pressure range is 400~1900Pa.