Title:
BLOWER DEVICE AND CLEANER
Document Type and Number:
WIPO Patent Application WO/2017/179498
Kind Code:
A1
Abstract:
Provided is a blower device having: an impeller rotatable about a vertically extending center axis; a motor located below the impeller and rotating the impeller; and a duct having in the inner space thereof an air flow passage, a suction opening through which fluid flows into the inner space, and a discharge opening which discharges fluid from the inner space, the duct accommodating the impeller. The impeller has: a plurality of circumferentially arranged blades; an annular shroud for connecting the upper parts of the plurality of blades and having an opening at a position axially facing the suction opening; and a base plate for connecting the lower parts of the plurality of blades and expanding radially. The duct has a cover section for covering at least a part of each of the blades and also covering the shroud from above. The inner diameter of the shroud is greater than or equal to the outer diameter of the base plate. The cover section has a first protrusion protruding axially downward from the lower surface of the cover section and disposed radially inside the inner peripheral surface of the shroud.
Inventors:
YOSHINO SHINGO (JP)
HAYAMITSU RYOSUKE (JP)
KISHI SAKAE (JP)
HAYAMITSU RYOSUKE (JP)
KISHI SAKAE (JP)
Application Number:
PCT/JP2017/014450
Publication Date:
October 19, 2017
Filing Date:
April 07, 2017
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
F04D29/16; F04D29/28; F04D29/42
Domestic Patent References:
| WO2006106744A1 | 2006-10-12 |
Foreign References:
| JP2008232020A | 2008-10-02 | |||
| JPH10311294A | 1998-11-24 | |||
| JPS5592100U | 1980-06-25 |
Other References:
See also references of EP 3444480A4
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