EP 0475493 A3 19920429 - SYSTEM FOR PURIFYING AIR
Title (en)
SYSTEM FOR PURIFYING AIR
Publication
Application
Priority
NL 9001890 A 19900829
Abstract (en)
[origin: EP0475493A2] A system for purifying and possibly conditioning of air in buildings and suchlike is shown, having a feeding duct (16) to the building, an exhaust duct (22) from the building and a recirculation connection (23), blowers (1,2) and filter means (4,5,6) in which the feeding duct contains a dust filter (4), an eletronic filter (5) having a fibre mat in an electric field without causing ionisation, and an active carbon filter (6), the system being suitable to recirculate all the exhaust air. <IMAGE>
IPC 1-7
IPC 8 full level
F24F 3/044 (2006.01); F24F 3/16 (2006.01); F24F 8/10 (2021.01); F24F 8/108 (2021.01); F24F 8/158 (2021.01)
CPC (source: EP US)
F24F 3/044 (2013.01 - EP); F24F 8/10 (2021.01 - EP US); F24F 8/108 (2021.01 - EP US); F24F 8/158 (2021.01 - EP US)
Citation (search report)
- [Y] WO 8907738 A1 19890824 - HALTON OY [FI]
- [Y] DE 2255868 A1 19730530 - SHIMIZU CONSTRUCTION CO LTD, et al
- [Y] EP 0229857 A1 19870729 - ENGINEERING DYNAMICS LIMITED [CA]
- [A] DE 2606072 A1 19760826 - PROJECTUS IND PRODUKTER AB
- [XP] EP 0384884 A2 19900829 - KALBERER FELIX
- [A] PATENT ABSTRACTS OF JAPAN, vol. 7, no. 89 (M-207)[1234], 13th April 1983; & JP-A-58 12 933 (TOKYO SHIBAURA DENKI K.K.) 25-01-1983
Designated contracting state (EPC)
AT BE CH DE DK FR GB LI NL SE
DOCDB simple family (publication)
EP 0475493 A2 19920318; EP 0475493 A3 19920429; NL 9001890 A 19920316
DOCDB simple family (application)
EP 91202155 A 19910823; NL 9001890 A 19900829