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(11)

EP 4 547 974 A1

(12)

(43) Date of publication: 07.05.2025 Bulletin 2025/19 (21) Application number: 23832004.8 (22) Date of filing: 09.06.2023

(51) International Patent Classification (IPC):  F04D 29/66(2006.01) F24F 13/24(2006.01) F04D 17/08(2006.01) (52) Cooperative Patent Classification (CPC): F24F 13/24; F24F 2013/205; F24F 13/20; F04D 29/281; F04D 29/162 (86) International application number: PCT/SE2023/050579 (87) International publication number: WO 2024/005688 (04.01.2024 Gazette 2024/01)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 30.06.2022 SE 2250816 (71) Applicant: Swegon Operations AB 535 23 Kvänum (SE)	(72) Inventor: OTTERSTEN, Martin 531 95 Källby (SE) (74) Representative: Westpatent AB  Almekärrsvägen 11 443 39 Lerum 443 39 Lerum (SE)