EP 0746427 A4 19960802 - A COMPUTERIZED VENTILATION SYSTEM
Title (en)
A COMPUTERIZED VENTILATION SYSTEM
Title (de)
RECHNERGESTÜTZTE LÜFTUNGSSYSTEM
Title (fr)
SYSTEME DE VENTILATION INFORMATISE
Publication
Application
Priority
- AU 9400686 W 19941109
- AU PM226893 A 19931109
Abstract (en)
[origin: WO9513146A1] This invention concerns ventilation systems, and in particular fume cupboards for chemical laboratories and the like. A fan running at constant speed extracts air from the fume cupboard through exhaust ducting, and an auxiliary duct allows air into the exhaust duct. Dampers in the ducts respond to measurements of the movement of the sash at the front of the fume cupboard to control the ratio of air drawn from the cupboard and through the auxiliary duct. The measurements are taken of direction and distance of sash movement, and are re-calibrated to a set point every time the sash passes a predetermined point.
IPC 1-7
IPC 8 full level
B08B 15/02 (2006.01)
CPC (source: EP)
B08B 15/023 (2013.01)
Citation (search report)
- [Y] US 4517883 A 19850521 - LEVCHENKO ALEC [GB], et al
- [YA] US 4934256 A 19900619 - MOSS CHARLES A [US], et al
- [A] AU 585163 A
- [A] US 4773311 A 19880927 - SHARP GORDON P [US]
- See references of WO 9513146A1
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI
DOCDB simple family (publication)
WO 9513146 A1 19950518; EP 0746427 A1 19961211; EP 0746427 A4 19960802
DOCDB simple family (application)
AU 9400686 W 19941109; EP 95900016 A 19941109