Electric blower for electric vacuum cleaner and electric vacuum cleaner equipped with the same

摘要

The invention provides an electric air feeder used for an electric dust collector and the electric dust collector provided with the electric air feeder, which are capable of smoothly carrying out energy conversion from dynamic pressure to static pressure in a diffuser and enabling flows flowing out from flow paths among blades to efficiently flow to return flow paths so as to improve the efficiency of the electric air feeder. The diffuser and an annular part are basically identical in diameter, a hub surface of the diffuser and a surface, on the side of the diffuser, of the annular part form curved surfaces which face a motor side more when the diameter is larger. The curvature of the curved surface, arranged on the side of the diffuser, of the annular part is larger than the curvature of the curved surface arranged on the hub surface of the diffuser, and the height of blades arranged on the peripheral side of the diffuser is higher than that of blades arranged on the center side.