Title:
MULTI-BLADE FAN
Document Type and Number:
WIPO Patent Application WO/2010/137140
Kind Code:
A1
Abstract:
A multi-blade fan having improved noise performance and air delivery performance. A multi-blade fan (1) is provided with a scroll type casing (2) having a bell-mouth-shaped suction opening (22), and also with a blade wheel (3) equipped with annularly arranged blades (31) and housed in the casing (2) with the rotation axis (m) of the blade wheel directed to the suction opening (22) of the casing (2). In the multi-blade fan (1), the center axis (l) of the suction opening (22) and the rotation axis (m) of the blade wheel (3) have a positional relationship in which the axes cross each other at a tilt angle φ or a positional relationship in which the axes are twisted relative to each other, and this results in a gap L between the suction opening (22) and the blade wheel (3) increasing from the rotation axis (m) of the blade wheel (3) toward the vicinity of a discharge opening (23) of the casing (2).
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Inventors:
OKAMOTO KAZUKI (JP)
SAKODA KENICHI (JP)
KIKUCHI HITOSHI (JP)
SAKODA KENICHI (JP)
KIKUCHI HITOSHI (JP)
Application Number:
PCT/JP2009/059710
Publication Date:
December 02, 2010
Filing Date:
May 27, 2009
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
OKAMOTO KAZUKI (JP)
SAKODA KENICHI (JP)
KIKUCHI HITOSHI (JP)
OKAMOTO KAZUKI (JP)
SAKODA KENICHI (JP)
KIKUCHI HITOSHI (JP)
International Classes:
F04D29/44; B60H1/00; F04D29/00; F04D29/66
Foreign References:
| JP2004143995A | 2004-05-20 | |||
| JP2002048097A | 2002-02-15 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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