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(11)

EP 3 759 400 A1

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(43) Date of publication: 06.01.2021 Bulletin 2021/01 (21) Application number: 19760886.2 (22) Date of filing: 27.02.2019

(51) International Patent Classification (IPC):  F24F 13/12(2006.01) F24F 13/06(2006.01) F24F 13/16(2006.01) F24F 7/10(2006.01) F24F 13/068(2006.01) F24F 13/24(2006.01) (86) International application number: PCT/SE2019/050173 (87) International publication number: WO 2019/168460 (06.09.2019 Gazette 2019/36)

(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: 28.02.2018 SE 1850226 (71) Applicant: Inventiair AB 115 26 Stockholm (SE)	(72) Inventors: SELLÖ, Martin 182 63 DJURSHOLM (SE) GUSTAFSSON, Madeleine 113 60 STOCKHOLM (SE) (74) Representative: Noréns Patentbyrå AB  Box 10198 100 55 Stockholm 100 55 Stockholm (SE)