(19)

(11)

EP 3 586 068 A2

(12)

(88) Date of publication A3: 18.10.2018 (43) Date of publication: 01.01.2020 Bulletin 2020/01 (21) Application number: 18710347.8 (22) Date of filing: 22.02.2018

(51) International Patent Classification (IPC):  F24F 13/08(2006.01) F24F 7/00(2006.01) (86) International application number: PCT/EP2018/054416 (87) International publication number: WO 2018/154003 (30.08.2018 Gazette 2018/35)

(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: MA MD TN (30) Priority: 22.02.2017 EP 17157506 17.11.2017 EP 17202399 (71) Applicant: Airmaster A/S 9600 Aars (DK)	(72) Inventor: BJØRN, Erik 9240 Nibe (DK) (74) Representative: Plougmann Vingtoft a/s  Strandvejen 70 2900 Hellerup 2900 Hellerup (DK)