(19)

(11)

EP 3 704 385 A1

(12)

(43) Date of publication: 09.09.2020 Bulletin 2020/37 (21) Application number: 18807706.9 (22) Date of filing: 30.10.2018

(51) International Patent Classification (IPC):  F04D 29/28(2006.01) F04D 29/44(2006.01) F04D 17/06(2006.01) F24F 13/20(2006.01) F24F 13/08(2006.01) F04D 29/42(2006.01) F04D 29/66(2006.01) F04D 29/70(2006.01) F24F 13/24(2006.01) (86) International application number: PCT/IB2018/058508 (87) International publication number: WO 2019/087078 (09.05.2019 Gazette 2019/19)

(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: 30.10.2017 GB 201717842 (71) Applicant: Zehnder Group International AG 5722 Gränichen (CH)	(72) Inventor: RAHIMI, Darius Littlehampton Sussex BN177LB (GB) (74) Representative: Dehns  St. Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)