EP 3677312 A1 20200708 - A POLLUTION MASK AND CONTROL METHOD
Title (en)
A POLLUTION MASK AND CONTROL METHOD
Title (de)
VERSCHMUTZUNGSMASKE UND STEUERUNGSVERFAHREN
Title (fr)
MASQUE DE POLLUTION ET PROCÉDÉ DE COMMANDE
Publication
Application
Priority
EP 19150469 A 20190107
Abstract (en)
A fan rotation speed or change in fan rotation speed is monitored of a mask, and from this a first value relating to magnitude of a pressure fluctuation across the fan and a second value relating to a rate of pressure fluctuation are obtained. It can then be determined whether or not the mask is worn based on the first and second values. This provides a reliable detection of whether or not the mask is worn and it requires a small amount of sampling data of the fan rotation signal, hence saving power.
IPC 8 full level
A62B 18/00 (2006.01)
CPC (source: EP)
A62B 18/006 (2013.01)
Citation (applicant)
EP 17185742 A 20170810
Citation (search report)
- [AD] WO 2018215225 A1 20181129 - KONINKLIJKE PHILIPS NV [NL]
- [A] EP 0661071 A1 19950705 - RESCARE LTD [AU]
Designated contracting state (EPC)
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 state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 19150469 A 20190107