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Patent Searching and Data


Title:
CENTRIFUGAL BLOWER AND VENTILATION FAN
Document Type and Number:
WIPO Patent Application WO/2017/033303
Kind Code:
A1
Abstract:
A centrifugal blower is provided with: an impeller (2) rotationally driven by a drive motor (3); a scroll casing (4) provided with a suction opening surface (10) having an opening (9), the scroll casing (4) being further provided with a wall (12), the distance of which from an axis serving as the rotation center of the impeller (2) varies depending on the position of the wall (12), the scroll casing (4) redirecting the air flow in the centrifugal direction, which is generated by the rotation of the impeller (2), to one direction; an air intake section (13) provided with a bell mouth section (18) having a large-diameter-side end (16) located further toward the upstream side of the flow of sucked-in air than the suction opening surface (10); and a protrusion section (15) extending from the air intake section (13) in the direction perpendicular to the axis as the rotation center of the impeller (2) and away from the rotation center and surrounding a part of the bell mouth section (18).

Inventors:
YAMAGUCHI, Keijiro (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
OKAMOTO, Kazuki (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KIKUCHI, Hitoshi (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
KOSAKI, Takahiro (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2015/073976
Publication Date:
March 02, 2017
Filing Date:
August 26, 2015
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
F04D29/44; F04D25/08
Foreign References:
JPH1018996A1998-01-20
JP2011001838A2011-01-06
JP2014055557A2014-03-27
Attorney, Agent or Firm:
TAKAMURA, Jun (Sakai International Patent Office, Toranomon Mitsui Building 8-1, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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