(19)

(11)

EP 4 069 648 A1

(12)

(43) Date of publication: 12.10.2022 Bulletin 2022/41 (21) Application number: 20820587.2 (22) Date of filing: 01.12.2020

(51) International Patent Classification (IPC):  C02F 3/12(2006.01) E03F 11/00(2006.01) B01D 21/02(2006.01) (52) Cooperative Patent Classification (CPC): C02F 3/1242; C02F 2103/002; C02F 2103/003; C02F 2201/007; C02F 2203/006; B01D 21/003; B01D 21/0003; C02F 3/1247; E03F 11/00; Y02W 10/10; Y02A 20/208 (86) International application number: PCT/SE2020/051147 (87) International publication number: WO 2021/112745 (10.06.2021 Gazette 2021/23)

(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 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: 03.12.2019 SE 1951386 (71) Applicant: FANN VA-Teknik AB 183 14 Täby (SE)	(72) Inventors: AMBROSSON, Joakim 182 34 Danderyd (SE) LANS, Martin 741 46 Knivsta (SE) ANDSKÄR, Rikard 196 36 Kungsängen (SE) (74) Representative: Brann AB  P.O. Box 3690 Sveavägen 63 103 59 Stockholm 103 59 Stockholm (SE)