Energy-saving noise reduction fan

The utility model provides an energy-saving noise reduction fan, and relates to the field of fans. Comprising a shell assembly, a driving device and an energy-saving noise reduction air inlet device used for forming vortexes, a plurality of air inlets are formed in the outer side wall of the energy-saving noise reduction air inlet device in the circumferential direction, and the energy-saving noise reduction air inlet device communicates with the shell assembly; an impeller in transmission connection with the driving device is arranged in the shell assembly, and the shell assembly is provided with an air outlet. The energy-saving noise reduction air inlet device is used for leading in air flow, air can form vortex after entering the energy-saving noise reduction air inlet device from the air inlet, the vortex enters the shell assembly, the rotation direction of the vortex is the same as that of the impeller, energy needed by rotation of the impeller is reduced, impact sound of the air flow and the impeller is