Split duct fan

The split duct fan comprises a vortex shell plate and a motor. The motor is arranged in the vortex shell plate, an impeller assembly is arranged in the vortex shell plate, and the output end of the motor is arranged with the impeller assembly. The utility model has the advantages of convenient installation and maintenance of the vortex shell plate and the impeller assembly, convenient replacement of the impeller assembly, avoiding the defects that the impeller assembly cannot be repaired due to rust, and at the same time adjusting the inclination Angle of the impeller blade according to the position of the outlet, so as to achieve the purpose of reducing the wind resistance and reducing the noise.