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EP 4 816 754 A1

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(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 23817101.1 (22) Date of filing: 30.11.2023

(51) International Patent Classification (IPC):  F27B 3/06(2006.01) F27B 3/20(2006.01) F27D 11/08(2006.01) F27D 25/00(2010.01) F27D 99/00(2010.01) F27B 3/08(2006.01) F27B 3/28(2006.01) F27D 11/10(2006.01) F27D 19/00(2006.01) (52) Cooperative Patent Classification (CPC): F27B 3/28; F27B 3/085; F27B 3/06; F27B 3/20; F27D 11/08; F27D 11/10; F27D 2019/0034; F27D 25/00; F27D 2099/0083; Y02P 10/20 (86) International application number: PCT/EP2023/083722 (87) International publication number: WO 2025/113801 (05.06.2025 Gazette 2025/23)

(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 (71) Applicant: ABB Schweiz AG 5400 Baden (CH)	(72) Inventors: STADLER, Raeto 8135 Langnau am Albis (CH) BAECHLE, Ralf 79809 Weilheim (DE) (74) Representative: Zimmermann & Partner Patentanwälte mbB  P.O. Box 330 920 80069 München 80069 München (DE)