CENTRIFUGAL BLOWER AND AIR CONDITIONING DEVICE

Title:

CENTRIFUGAL BLOWER AND AIR CONDITIONING DEVICE

Document Type and Number:

WIPO Patent Application WO/2022/085149

Kind Code:

A1

Abstract:

Provided is a centrifugal blower including: an impeller that has a main plate, a ring-shaped side plate, and a plurality of blades arranged in the circumferential direction; and a scroll casing that has a circumferential wall formed in a spiral shape and a side wall having a bell mouth, which forms a suction port, and that accommodates the impeller. The plurality of blades each have: an inner-circumferential end; an outer-circumferential end; a sirocco-blade section that configures a forward blade formed so as to have an exit angle greater than 90 degrees; a turbo-blade section that configures a backward blade; a first region that is located on a side closer to the main plate than an intermediate position of the rotation axis in the axial direction is; and a second region that is located on a side closer to the side plate than the first region is. The plurality of blades are formed such that the outer diameter of the blades is larger than the inner diameter of the bell mouth. The plurality of blades are each formed such that the blade length in the first region is longer than the blade length in the second region, and each have, in the first region and the second region, sections formed such that the percentage of the turbo-blade section in the radial direction is larger than the percentage of the sirocco-blade section. When a section of each of the plurality of blades located closer to an outer-circumference side than an inner-circumference-side end that is an end of the bell mouth at the inner-circumference side, in the radial direction, is defined as an outer-circumference-side blade section, the outer-circumference-side blade section is formed such that the percentage of the sirocco-blade section in the radial direction is equal to or larger than the percentage of the turbo-blade section, in the first region and the second region.

More Like This:

WO/2013/005566	POWER TOOL
WO/2022/077934	IMPELLER
JP2004011423	AIR FLOW CONTROL STRUCTURE OF AIR BLOWING SECTION

Inventors:

TERAMOTO TAKUYA (JP)
HAYASHI HIROYASU (JP)
HORIE RYO (JP)
AKARI YOSHITAKA (JP)
YAMAGUCHI TAKASHI (JP)
MICHIKAMI KAZUYA (JP)
YAMATANI TAKAHIRO (JP)

Application Number:

PCT/JP2020/039692

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:

WO2019082378A1

2019-05-02

Foreign References:

JP2000240590A	2000-09-05
JP2005155580A	2005-06-16
JPH10306796A	1998-11-17
JPH10185238A	1998-07-14
JP2007162566A	2007-06-28
JP2015094251A	2015-05-18
JP2011226410A	2011-11-10
JP2000240590A	2000-09-05

Other References: