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(11)

EP 4 139 622 A1

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(43) Date of publication: 01.03.2023 Bulletin 2023/09 (21) Application number: 20742636.2 (22) Date of filing: 18.05.2020

(51) International Patent Classification (IPC):  F28D 15/02(2006.01) (52) Cooperative Patent Classification (CPC): F28D 15/0241 (86) International application number: PCT/BY2020/000004 (87) International publication number: WO 2021/232134 (25.11.2021 Gazette 2021/47)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Huawei Technologies Co., Ltd. Longgang District, Shenzhen, Guangdong 518129 (CN)	(72) Inventors: MU, Junwei Shenzhen, Guangdong 518129 (CN) IANG, Guo Shenzhen, Guangdong 518129 (CN) FILATAU, Sviataslau Alehavich Shenzhen, Guangdong 518129 (CN) (74) Representative: Isarpatent  Patent- und Rechtsanwälte Barth Charles Hassa Peckmann & Partner mbB Friedrichstrasse 31 80801 München 80801 München (DE)