| 摘要 |
An electric blower is provided to improve blow efficiency from an inlet to an outlet, and to increase the area of passage from the inlet to the outlet. An electric blower comprises an impeller(1), an inducer(8), an air guide(11), a casing(13) and an electric motor(14). The impeller has a front shroud(2), a rear shroud(3), and a plurality of blades(4) provided between the front and rear shrouds. The inducer has a hub(6) disposed in an inlet(5) of the impeller. The air guide is provided around an outer periphery of the impeller. The casing encloses the impeller and the air guide and has an intake opening(12) at the center. The electric motor rotates the impeller, wherein the area of a passage cross-section perpendicular to the center line of a passage from the inlet to an outlet(25) of the impeller that is defined by the front shroud, the rear shroud and the hub of the inducer, is monotonically increased from the inlet to the outlet.
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