Vortex fans are also known as high-pressure fans, vortex fans, high-pressure air pumps, and vortex fans. The impeller of a vortex fan consists of dozens of blades, similar to the impeller of a large gas turbine. The air in the middle of the impeller blade is subjected to a centrifugal force and moves towards the edge of the impeller, where the air enters the annular cavity of the pump body and is recirculated in the same manner from the starting point of the blade. The circulating air flow generated by the rotation of the impeller leaves the air pump with extremely high energy for use. The vortex fan uses a motor, which is compact in structure, small in size, light in weight, and low in noise. The delivered air source is free of water and oil.