CENTRIFUGAL BLOWER AND AIR CONDITIONING DEVICE

Title:

CENTRIFUGAL BLOWER AND AIR CONDITIONING DEVICE

Document Type and Number:

WIPO Patent Application WO/2022/085143

Kind Code:

A1

Abstract:

This centrifugal blower comprises: an impeller which has a main plate, a side plate, and a plurality of vanes; and a scroll casing which has a spiral-shaped peripheral wall and a side wall that has a bell-mouth, and which houses the impeller. The plurality of vanes each have, in the radial direction centered on the rotation axis, an inner peripheral end, an outer peripheral end, a sirocco blade part that constitutes a forward-facing vane, a turbo blade part that constitutes a rear-facing vane, a first region that is positioned more toward the main plate than is the center position in the axial direction of the rotation axis, and a second region that is positioned more toward the side plate than is the first region. Each of the plurality of vanes is such that: blade length in the first region is longer than blade length in the second region; and in the first region and the second region, the proportion accounted for by the turbo blade part in the radial direction is greater than the proportion accounted for by the sirocco blade part. In the side plate-side end part of each of the plurality of vanes in the axial direction, an outer peripheral-side vane part is formed such that the blade thickness of the vane decreases from the inner peripheral side to the outer peripheral side in the radial direction, where the outer peripheral-side vane part is defined as the part of each of the plurality of vanes which is positioned more toward the outer peripheral side than is a vane inner diameter constituted by the inner peripheral end of that vane.

Inventors:

TERAMOTO TAKUYA (JP)
HAYASHI HIROYASU (JP)
HORIE RYO (JP)
AKARI YOSHITAKA (JP)
YAMAGUCHI TAKASHI (JP)
MICHIKAMI KAZUYA (JP)
YAMATANI TAKAHIRO (JP)
TAKAGI MASAHIKO (JP)
WATANABE KAZUKI (JP)
SEKI HIDETOSHI (JP)

Application Number:

PCT/JP2020/039665

Publication Date:

April 28, 2022

Filing Date:

October 22, 2020

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
MITSUBISHI ELECTRIC HOME APPLIANCE CO LTD (JP)

International Classes:

F04D29/30

Domestic Patent References:

WO2008111368A1

2008-09-18

Foreign References:

JP2000240590A	2000-09-05
JP2009203897A	2009-09-10
JP2012202368A	2012-10-22
JP2005155580A	2005-06-16
JPH10306796A	1998-11-17
JP2007127089A	2007-05-24
JP2000240590A	2000-09-05

Other References: