The SWF series mixed flow fan is a new type of fan that is between axial flow fans and centrifugal fans, and combines the strengths of both. Its air pressure is higher than that of axial flow fans of the same model, and its air volume is larger than that of centrifugal fans of the same model. It has the advantages of wide high-efficiency zone and high efficiency. This fan is widely used in the air supply and exhaust systems of office buildings, hotels, and other large high-end civil buildings. It can also be used for ventilation and air exchange in industrial and mining enterprises such as cold storage and textiles, replacing low-pressure centrifugal fans or high-pressure axial fans.