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1. (WO2018107883) CENTRIFUGAL FAN BLADE AND CENTRIFUGAL FAN
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2018/107883 International Application No.: PCT/CN2017/106028
Publication Date: 21.06.2018 International Filing Date: 13.10.2017
IPC:
F04D 29/28 (2006.01) ,F04D 29/30 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
D
NON-POSITIVE-DISPLACEMENT PUMPS
29
Details, component parts, or accessories
26
Rotors specially adapted for elastic fluids
28
for centrifugal or helico-centrifugal pumps
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04
POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
D
NON-POSITIVE-DISPLACEMENT PUMPS
29
Details, component parts, or accessories
26
Rotors specially adapted for elastic fluids
28
for centrifugal or helico-centrifugal pumps
30
Vanes
Applicants: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI[CN/CN]; West Jinji Road, Qianshan Zhuhai, Guangdong 519070, CN
Inventors: TIAN, Yasong; CN
LI, Jianjian; CN
XIONG, Jun; CN
WU, Junhong; CN
LI, Dawei; CN
Agent: BEIJING XURUN LAW FIRM; Room B-1605, Caizhi International Building, No.18 Zhongguancun East Road, Haidian District Beijing 100083, CN
Priority Data:
201611169462.116.12.2016CN
Title (EN) CENTRIFUGAL FAN BLADE AND CENTRIFUGAL FAN
(FR) PALE DE VENTILATEUR CENTRIFUGE ET VENTILATEUR CENTRIFUGE
(ZH) 离心风叶及离心风机
Abstract:
(EN) Disclosed are a centrifugal fan blade and a centrifugal fan, comprising a plurality of blades (10), a blade leading edge (11) of at least some of the blades (10) being provided with an interference groove (11a), the interference groove (11a) extending in the width direction of the blade (10). By providing an interference groove (11a) extending in the width direction of the blade (10) on the blade leading edge (11), when the fan blade is running, the interference groove (11a) changes the noise frequency, thereby preventing the blade leading edge (11) from producing a relatively great wideband noise after being hit with a high speed air flow, thus effectively reducing noise.
(FR) L'invention concerne une pale de ventilateur centrifuge et un ventilateur centrifuge, comprenant une pluralité de pales (10), un bord d'attaque (11) de pale d'au moins une partie des pales (10) étant pourvu d'une rainure d'interférence (11a), la rainure d'interférence (11a) s'étendant dans le sens de la largeur de la pale (10). En fournissant une rainure d'interférence (11a) s'étendant dans le sens de la largeur de la pale (10) sur le bord d'attaque (11) de pale, lorsque la pale de ventilateur tourne, la rainure d'interférence (11a) modifie la fréquence du bruit, empêchant ainsi le bord d'attaque (11) de pale de produire un bruit à large bande relativement important après avoir été frappé par un flux d'air à grande vitesse, réduisant ainsi efficacement le bruit.
(ZH) 一种离心风叶及离心风机,包括多个叶片(10),至少部分叶片(10)的叶片前缘(11)上设置有干扰槽(11a),干扰槽(11a)沿叶片(10)的宽度方向延伸。通过在叶片前缘(11)上设置沿叶片(10)的宽度方向延伸的干扰槽(11a),风叶运行时,干扰槽(11a)改变噪音频率,从而防止叶片前缘(11)处受高速气流冲击后产生较大的宽频噪声,进而有效降低噪音。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Chinese (ZH)
Filing Language: Chinese (ZH)