Operating Principle:

Common medium-pressure fans are centrifugal fans, with the impeller covered by a mechanical casing, and the center of the impeller being the intake. As the medium-pressure fan operates, the power equipment drives the impeller to rotate, drawing air in through the intake. During the rotation of the fan blades, they impart dynamic force to the gas, increasing its pressure and velocity. Under the action of centrifugal force, the gas is discharged along the impeller channels from the exhaust outlet.

During operation, although the rotation of the impeller increases the pressure and velocity of the gas, the various change amounts are relatively small. Therefore, in the design and use of centrifugal fans, the gas is typically treated as an incompressible fluid. The gas processing of medium-pressure fans is all completed within the same radial plane, hence the term "axial flow centrifugal fan" for medium-pressure fans.

Technical Parameters: In the technical specifications of medium-pressure fans, the most important factors to consider are gas flow rate, pressure, power transmission, efficiency, and impeller speed, all of which are crucial during the selection process. The gas flow rate parameter of a medium-pressure fan represents the volume of gas the fan can handle in a unit of time, while the pressure refers to the internal gas pressure value during the operation of the medium-pressure fan.

The efficiency of a medium-pressure fan refers to the ratio between the shaft power of the fan and the effective power of the actual gas it processes. The total pressure efficiency of centrifugal fans is approximately 90%, and in the future development of centrifugal fans, efficiency values will be one of the goals that researchers will further pursue.

Centrifugal fans are widely used for dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; for ventilation and exhaust in boilers and industrial furnaces; for cooling and ventilation in air conditioning equipment and household appliances; for drying and conveying grains; and for inflation and propulsion of wind tunnels and hovercrafts.