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(11)

EP 4 771 281 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24765358.7 (22) Date of filing: 29.08.2024

(51) International Patent Classification (IPC):  F04D 9/00(2006.01) F24D 19/08(2006.01) F04D 15/00(2006.01) (52) Cooperative Patent Classification (CPC): F04D 9/001; F24D 19/083; F04D 15/0005 (86) International application number: PCT/EP2024/074219 (87) International publication number: WO 2025/046029 (06.03.2025 Gazette 2025/10)

(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: GE KH MA MD TN (30) Priority: 31.08.2023 DK PA202370452 31.08.2023 DK PA202370453 (71) Applicant: Grundfos Holding A/S 8850 Bjerringbro (DK)	(72) Inventors: OLESEN, Tobias Randers 8850 Bjerringbro (DK) SØRENSEN, Søren Emil 8850 Bjerringbro (DK) (74) Representative: Patentanwälte Hemmer Lindfeld Frese Partnerschaft mbB  Wallstraße 33a 23560 Lübeck 23560 Lübeck (DE)