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(11)

EP 4 374 079 A1

(12)

(43) Date of publication: 29.05.2024 Bulletin 2024/22 (21) Application number: 22740913.3 (22) Date of filing: 08.07.2022

(51) International Patent Classification (IPC):  F04D 25/06(2006.01) F04D 29/64(2006.01) (52) Cooperative Patent Classification (CPC): F04D 29/646; F04D 25/062; F04D 25/064; F05D 2230/60 (86) International application number: PCT/EP2022/069119 (87) International publication number: WO 2023/001597 (26.01.2023 Gazette 2023/04)

(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 (30) Priority: 20.07.2021 WO PCT/CN2021/107480 (71) Applicant: Koninklijke Philips N.V. 5656 AG Eindhoven (NL)	(72) Inventors: LIN, Fu-Lung 5656 AG Eindhoven (NL) GU, Wei 5656 AG Eindhoven (NL) LI, Bing 5656 AG Eindhoven (NL) HUANG, Haiyong 5656 AG Eindhoven (NL) TANG, Lijuan 5656AG Eindhoven (NL) CHEN, Weizhong 5656 AG Eindhoven (NL) (74) Representative: Philips Intellectual Property & Standards  High Tech Campus 52 5656 AG Eindhoven 5656 AG Eindhoven (NL)