Title:
ELECTRIC BLOWER
Document Type and Number:
WIPO Patent Application WO/2021/192656
Kind Code:
A1
Abstract:
According to the present invention, a centrifugal fan provided with an electric blower includes a shroud including an intake port, a hub facing the shroud, and a plurality of blades disposed between the shroud and the hub, wherein, in each of the plurality of blades: an inner circumferential side end portion is positioned inside the intake port, and the inner circumferential side end portion is inclined in such a way that a shroud-side part of the inner circumferential side end portion is positioned on the positive side, in the direction of rotation of the centrifugal fan, of the hub-side part thereof; the radius of curvature of the hub-side end surface, in the in-plane direction of the main surface of the hub, is greater in an outer circumferential side end portion than in the inner circumferential side end portion; the angle between the side surface of the hub-side part and the main surface of the hub is greater in the outer circumferential side end portion than in the inner peripheral side end portion; and the input angle of an inner circumferential side part is at least equal to 40 degrees.
Inventors:
SHIMASAKI TETSUO
UENO MAKOTO
UENO MAKOTO
Application Number:
PCT/JP2021/004501
Publication Date:
September 30, 2021
Filing Date:
February 08, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
F04D29/28; F04D29/30
Domestic Patent References:
| WO2017154151A1 | 2017-09-14 |
Foreign References:
| JP2011226398A | 2011-11-10 | |||
| JP2757501B2 | 1998-05-25 | |||
| JP3796974B2 | 2006-07-12 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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