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1. (WO2018003017) ELECTRIC BLOWER AND ELECTRIC VACUUM CLEANER

Pub. No.:    WO/2018/003017    International Application No.:    PCT/JP2016/069150
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Wed Jun 29 01:59:59 CEST 2016
IPC: F04D 29/44
A47L 9/00
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
MITSUBISHI ELECTRIC HOME APPLIANCE CO., LTD.
三菱電機ホーム機器株式会社
Inventors: ADACHI, Naho
安達 奈穂
IKEDA, Takashi
池田 尚史
HAMAZAKI, Mitsumasa
浜崎 光将
Title: ELECTRIC BLOWER AND ELECTRIC VACUUM CLEANER
Abstract:
The purpose of the present invention is to provide an electric blower that is highly efficient even with a small diameter and an electric cleaner equipped with the electric blower. The present invention is equipped with a centrifugal impeller (11), an electric motor (9), and a diffuser (15) disposed between the centrifugal impeller (11) and the electric motor in the direction of the rotating shaft of the centrifugal impeller (11). The diffuser (15) includes a main plate (14) and a plurality of stator blades (12) and a plurality of return stator blades (13) that are disposed on the main plate. The main plate comprises a connecting section (14A) that is located further toward the outer circumference side, relative to the rotating shaft, than the centrifugal impeller (11) and that is connected to the plurality of stator blades. Each of the plurality of stator blades comprises an outer circumference section (12B) that is located farther from the rotating shaft than the connecting section. Each of the outer circumference sections of the plurality of stator blades comprises an extension section (23) that extends further toward the electric motor side than the connecting section of the main plate in the abovementioned direction. The ratio D0/D1 of the diameter D0 of a circle internally tangential to an outer edge section of the main plate to the diameter D1 of a circle externally tangential to the outer circumference sections of the plurality of stator vanes is greater than 0.9.