Title:
BLOWING DEVICE AND HEAT PUMP UNIT
Document Type and Number:
WIPO Patent Application WO/2021/039597
Kind Code:
A1
Abstract:
A blowing device (50) is provided with a propeller fan (14) and a casing (51). The propeller fan (14) has a plurality of blades (141, 142, 143) disposed at unequal pitches, and rotates about the rotation axis (RA). The casing (51) houses therein the propeller fan (14), and has a bell-mouth (52) and a depth (L). The bell-mouth (52) has a cylindrical part (52b) parallel to the rotation axis (RA). When the length of each of the blades (141, 142, 143) in the direction of the rotation axis (RA) is denoted by H0, and the length of the cylindrical part (52b) in the direction of the rotation axis (RA) is denoted by H2, the relationship of formula (1) is established.
Inventors:
ANDOU HIROKI
ONO TAKASHI
MORI TOSHIHIRO
ONO TAKASHI
MORI TOSHIHIRO
Application Number:
PCT/JP2020/031499
Publication Date:
March 04, 2021
Filing Date:
August 20, 2020
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F04D29/66; F04D29/38; F04D29/54
Domestic Patent References:
| WO2018016012A1 | 2018-01-25 | |||
| WO2017060973A1 | 2017-04-13 | |||
| WO2012035577A1 | 2012-03-22 | |||
| WO2015121989A1 | 2015-08-20 |
Foreign References:
| JPH05223093A | 1993-08-31 | |||
| JP2019002378A | 2019-01-10 | |||
| JP4140236B2 | 2008-08-27 |
Other References:
See also references of EP 4023891A4
Attorney, Agent or Firm:
SHINJYU GLOBAL IP (JP)
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