Title:
MULTI-BLADE FAN
Document Type and Number:
WIPO Patent Application WO/2007/108342
Kind Code:
A1
Abstract:
A multi-blade fan having a convoluted casing provided with a suction opening
and a discharge opening, an electric motor placed inside the casing, a main plate
vertical to the rotating shaft of the electric motor and having an airflow hole,
a first blade provided on the suction opening side of the main plate, and a second
blade provided on the opposite side of the suction opening of the suction opening.
The diameter of the main plate is smaller than the outer diameters of the first
blade and the second blade, greater than the inner diameters of the blades, and
the exit angle of either or both of the first blade and the second blade sequentially
varies in the axial direction.
Inventors:
OGINO KAZUO
SHIRAHAMA SEIJI
SHIRAHAMA SEIJI
Application Number:
PCT/JP2007/054767
Publication Date:
September 27, 2007
Filing Date:
March 12, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
OGINO KAZUO
SHIRAHAMA SEIJI
OGINO KAZUO
SHIRAHAMA SEIJI
International Classes:
F04D29/30; F04D29/28
Foreign References:
| JP2001271791A | 2001-10-05 | |||
| JPH062698A | 1994-01-11 | |||
| JP2001115997A | 2001-04-27 |
Attorney, Agent or Firm:
IWAHASHI, Fumio et al. (1006, Oaza Kadom, Kadoma-shi Osaka 01, JP)
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