Title:
CENTRIFUGAL BLOWER
Document Type and Number:
WIPO Patent Application WO/2020/230563
Kind Code:
A1
Abstract:
A centrifugal blower (1) is provided with: an inside/outside air box (10); an impeller (30); a scroll casing (50); a bell mouth (60); a separation cylinder (70); and a partition (57) that partitions a ventilation path (53) inside the scroll casing into first and second ventilation paths (531, 532). The scroll casing has a nose part (Ps) where the scroll diameter is smallest and a winding end part (Pe) where the scroll diameter is largest. If a suction port is divided into front and rear half regions (62, 63) by a basis line (Lb) passing through a rotary shaft and the nose part, an air introduction part is disposed so that an area overlapping the front half region in an axial direction is larger than that overlapping the rear half region. At least a part of an outer peripheral wall is formed such that a spread angle (α1) from the nose part to an intermediate part (Pm) set between the nose part and the winding end part is larger than a spread angle (α2) from the intermediate part to the winding end part.
Inventors:
KOSAKA SYO (JP)
ODA SYUZOU (JP)
ODA SYUZOU (JP)
Application Number:
PCT/JP2020/017395
Publication Date:
November 19, 2020
Filing Date:
April 22, 2020
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F04D29/44; B60H1/00; F04D25/16
Foreign References:
| JP2018091274A | 2018-06-14 | |||
| JPH1137096A | 1999-02-09 | |||
| JPS61229999A | 1986-10-14 | |||
| JP2019011694A | 2019-01-24 |
Attorney, Agent or Firm:
YOU-I PATENT FIRM (JP)
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