Title:
MULTIBLADE CENTRIFUGAL FAN
Document Type and Number:
WIPO Patent Application WO/2022/085174
Kind Code:
A1
Abstract:
This multiblade centrifugal fan comprises: a fan having a disc-shaped main plate, a plurality of blades that are arrayed in the circumferential direction on the circumferential edge portion of the main plate and that each have a first end portion connected to the main plate, and a ring-shaped side plate that is provided to second end portions paired with the first end portions of the respective plurality of blades and that links the plurality of blades; and a spiral-type scroll casing having a circumferential wall and facing side walls to which an intake inlet is provided, accommodating the fan such that the side walls and the second end portions of the plurality of blades face each other, and guiding air entering from the intake inlet so as to exit circumferentially outward. Each blade has a sirocco blade portion formed from a forward-curved blade, and a turbo blade portion formed from a backward-curved blade that is provided more circumferentially inward than the sirocco blade portion. The second end portions of the blades extend along the side walls, and each includes an end surface of the sirocco blade portion and an end surface of the turbo blade portion. Each blade extends circumferentially inward from the inner circumferential ends of the side walls such that part of an end surface of the turbo blade portion is positioned more circumferentially inward than the inner circumferential ends of the side walls and the remaining part of the end surface of the turbo blade portion is covered by the side walls.
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Inventors:
HAYASHI HIROYASU (JP)
TERAMOTO TAKUYA (JP)
HORIE RYO (JP)
YAMAGUCHI TAKASHI (JP)
NAGANO TOMOHIRO (JP)
MICHIKAMI KAZUYA (JP)
YAMATANI TAKAHIRO (JP)
TERAMOTO TAKUYA (JP)
HORIE RYO (JP)
YAMAGUCHI TAKASHI (JP)
NAGANO TOMOHIRO (JP)
MICHIKAMI KAZUYA (JP)
YAMATANI TAKAHIRO (JP)
Application Number:
PCT/JP2020/039891
Publication Date:
April 28, 2022
Filing Date:
October 23, 2020
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F04D29/28
Foreign References:
| JP2000145693A | 2000-05-26 | |||
| JPH11166498A | 1999-06-22 | |||
| JP2000240590A | 2000-09-05 |
Other References:
See also references of EP 4234943A4
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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