EP0246444A2 - Dispositif d'alarme pour l'indication de l'état d'épuisement d'un filtre à gaz - Google Patents

Dispositif d'alarme pour l'indication de l'état d'épuisement d'un filtre à gaz Download PDF

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Publication number
EP0246444A2
EP0246444A2 EP87105362A EP87105362A EP0246444A2 EP 0246444 A2 EP0246444 A2 EP 0246444A2 EP 87105362 A EP87105362 A EP 87105362A EP 87105362 A EP87105362 A EP 87105362A EP 0246444 A2 EP0246444 A2 EP 0246444A2
Authority
EP
European Patent Office
Prior art keywords
warning device
gas filter
heat exchanger
measuring cell
harmful
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87105362A
Other languages
German (de)
English (en)
Other versions
EP0246444B1 (fr
EP0246444A3 (en
Inventor
Jürgen Coym
Michael Freidank
Axel Dr. Schubert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Auergesellschaft GmbH
Original Assignee
Auergesellschaft GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6299213&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0246444(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Publication of EP0246444A2 publication Critical patent/EP0246444A2/fr
Publication of EP0246444A3 publication Critical patent/EP0246444A3/de
Application granted granted Critical
Publication of EP0246444B1 publication Critical patent/EP0246444B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/088—Devices for indicating filter saturation

Definitions

  • the invention relates to a warning device for indicating the state of exhaustion of a harmful gas from the air removing or restraining or converting into less harmful substances in connection with a breathing connection.
  • the approaching end of the service life is indicated to the user by a chemical warning layer introduced into the gas filter in such a way that he perceives a correspondingly unpleasant smell on the clean air side of the gas filter as an exhaustion feature. It is a so-called odor detector.
  • This warning device is disadvantageous in that, due to the possible effects of atmospheric moisture on the warning layer, premature exhaustion of the gas filter which retains the harmful gases can be simulated and the gas filter is therefore not used optimally.
  • the invention is therefore based on the object of providing a warning device for displaying the state of exhaustion of a gas filter which retains harmful gases and which ensures reliable indication of exhaustion with optimal utilization of the service life of the gas filter.
  • the advantages achieved by the invention consist in particular in that, on the one hand, the holding time of the gas filter can be increased considerably compared to the previously usual and, on the other hand, a reliable indication of exhaustion is given.
  • the warning device 1 consists of a cartridge-like housing 2 with two opposite connecting pieces 2a and 2b, into which an electrochemical measuring cell 3, a battery 4, an electronic circuit 5, a light-emitting diode 6, an acoustic signal generator 7 and a heat exchanger 8 are housed.
  • An exhalation valve 9 is provided on the housing side of the connecting piece 2a.
  • the heat exchanger 8 is only required if the warning device 1 is used, for example, in a carbon monoxide gas filter, because heating of the inhaled air of over 35 ° C. is then to be expected and the electrochemical measuring cell 3 must be protected from these hot temperatures.
  • the warning device 1 is to be ventilated in alternating breathing, so that the exhalation valve of the breathing connection must be sealed. In the event that the inhalation temperature is below 35 ° C, no heat exchanger is required in warning device 1. The consequence of this is that the warning device 1 then does not have an exhalation valve 9, since the warning device 1 does not have to be ventilated in alternating breathing because of the lack of a heat exchanger.
  • electrochemical measuring cells for the detection of carbon monoxide, chlorine, hydrogen sulfide, hydrocyanic acid and oxygen, which can be used in the warning device 1 for the corresponding gas filter.
  • FIGS. 3 to 5 how the warning device 1 can be installed in a filter device.
  • the cartridge-like housing 2 of the warning device 1 is connected on the one hand with the connection piece 2a to the breathing hose 11 leading to the gas filter 10 and on the other hand with the connection piece 2b directly to the full face mask 12.
  • the gas filter 10 can, for. B. can also be a filter canister.
  • Carbon monoxide retaining gas filter is as follows: The gas filter 10 is ventilated in one direction, ie the inhaled air I flows through the gas filter and through the warning device 1 into the full face mask 12 of the user.
  • the exhaled air II then passes the warning device 1 to behind the heat exchanger 8 and flows out via the exhalation valve 9. From this it is clear that the warning device 1 is ventilated in pendulum breathing.
  • the heat exchanger 8 is cooled by the exhaled air II, so that the hot inhaled air I is cooled from the gas filter 10 when inhaled again, and advantageously to below 40 C, for example, in order to ensure proper functioning of the electrochemical measuring cell 3 when the inhaled air is above a bypass, not shown in the drawing by diffusion through a Teflon membrane reaches the inside of the measuring cell 3.
  • the measuring cell works on the principle of electrochemical oxidation and serves as a measuring element for the detection of harmful concentrations of harmful gases in the inhaled air, which can no longer be retained or removed by the upstream gas filter 10 in the event of exhaustion.
  • the measuring cell 3 measures a certain harmful pollutant concentration, which indicates that the pollutant retained in the gas filter breaks through, which means that the gas filter 10 is exhausted.
  • the warning device 1 with the connection piece 2a is connected directly to the gas filter 10 designed as a filter sleeve and with the connection piece 2b to the breathing tube 11 with the full mask 12.
  • the warning device 1 is connected between the gas filter 10 and the full face mask 12.
  • Fig. 6 shows the electronic circuit arrangement of the warning device 1 as a block diagram, consisting of the electrochemical measuring cell 3 which is followed by a signal amplifier 13 and this a threshold switch 14 and the light emitting diode 6 and the acoustic signal generator 7.
  • a battery 15 is provided with a battery monitor 16, which indicates the consumption of the battery on the light-emitting diode 6 and the signal transmitter 7 optically and acoustically.
  • the switching threshold of the threshold switch 14 is set to the measurement signal corresponding to the alarm-triggering measurement value, which corresponds to a certain harmful gas concentration which indicates the end of the usage time of the gas filter 10.
  • the measurement signal coming from the measuring cell 3 exceeds the set switching threshold (alarm threshold) of the threshold switch 16, its output becomes conductive and the LED 6 and the signal transmitter 7 are activated and trigger the optical and acoustic alarm.
  • the gas filter 10 is then used up.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP87105362A 1986-04-22 1987-04-10 Dispositif d'alarme pour l'indication de l'état d'épuisement d'un filtre à gaz Expired - Lifetime EP0246444B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3613512A DE3613512C3 (de) 1986-04-22 1986-04-22 Elektrische Warneinrichtung zur Anzeige des Erschöpfungszustandes eines Schadgase zurückhaltenden Gasfilters
DE3613512 1986-04-22

Publications (3)

Publication Number Publication Date
EP0246444A2 true EP0246444A2 (fr) 1987-11-25
EP0246444A3 EP0246444A3 (en) 1990-08-22
EP0246444B1 EP0246444B1 (fr) 1993-02-03

Family

ID=6299213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105362A Expired - Lifetime EP0246444B1 (fr) 1986-04-22 1987-04-10 Dispositif d'alarme pour l'indication de l'état d'épuisement d'un filtre à gaz

Country Status (3)

Country Link
US (1) US4873970A (fr)
EP (1) EP0246444B1 (fr)
DE (2) DE3613512C3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677765A1 (fr) * 1991-06-17 1992-12-18 Commissariat Energie Atomique Procede de surveillance de l'etat de saturation d'une masse de charbon active filtrante d'un dispositif de filtration et cartouche de masque respiratoire en portant application.
WO1996012524A1 (fr) * 1994-10-24 1996-05-02 Minnesota Mining And Manufacturing Company Exposimetre
WO1996012523A1 (fr) * 1994-10-24 1996-05-02 Minnesota Mining And Manufacturing Company Exposimetre a signal d'alarme

Families Citing this family (49)

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DE3818052A1 (de) * 1988-05-27 1989-12-07 Geraetebau Gmbh Atemschutzmaske
DE3838531A1 (de) * 1988-11-14 1990-05-17 Wolfgang Gerigk Vorrichtung zur detektierung von verseuchter und vergifteter atemluft
DE4009107A1 (de) * 1990-03-21 1991-09-26 Auergesellschaft Gmbh Warneinrichtung mit einer messzelle und alarmgebern zur anzeige des erschoefpungszustandes eines gasfilters
CA2020503C (fr) * 1990-07-05 1998-11-17 Jacques Lesage Cartouche de filtrage des produits chimiques pour masques a gaz
USD339658S (en) 1991-05-02 1993-09-21 Air-Ace Oy Respirator
DE4132680C2 (de) * 1991-10-01 1994-02-10 Draegerwerk Ag Atemschutzmaske mit Innenhalbmaske und Schadstoffindikator
DE4133235A1 (de) * 1991-10-07 1993-04-08 Draegerwerk Ag Geblaeseunterstuetztes atemschutzgeraet mit einem aufsetzbaren steuerteil
US5117821A (en) * 1991-10-18 1992-06-02 White George M Hunting mask with breath odor control system
DE4214239C2 (de) * 1992-04-30 1994-06-16 Draegerwerk Ag Atemschutzmaske mit einem indikator
US5338430A (en) * 1992-12-23 1994-08-16 Minnesota Mining And Manufacturing Company Nanostructured electrode membranes
WO1995009676A1 (fr) 1993-10-01 1995-04-13 Minnesota Mining And Manufacturing Company Adaptateur de transmission de signaux vocaux destine a un masque respiratoire
US5906203A (en) * 1994-08-01 1999-05-25 Safety Equipment Sweden Ab Breathing apparatus
TW287952B (fr) * 1994-08-31 1996-10-11 Lifepro Inc
US5856198A (en) * 1994-12-28 1999-01-05 Extraction Systems, Inc. Performance monitoring of gas-phase air filters
US5676133A (en) * 1995-06-14 1997-10-14 Apotheus Laboratories, Inc. Expiratory scavenging method and apparatus and oxygen control system for post anesthesia care patients
US5878743A (en) * 1996-09-23 1999-03-09 Respironics, Inc. Pressure sensitive flow control valve
US6003511A (en) * 1996-11-18 1999-12-21 Medlis Corp. Respiratory circuit terminal for a unilimb respiratory device
DE19650897A1 (de) * 1996-12-07 1998-06-10 T E M Tech Entwicklung Und Man Apparat und Verfahren zur Erhöhung der Sicherheit von Atemschutzmasken
US6096267A (en) 1997-02-28 2000-08-01 Extraction Systems, Inc. System for detecting base contaminants in air
DE69816277T2 (de) * 1997-02-28 2004-06-03 Extraction Systems, Inc., Franklin System zum nachweis von aminen und anderen basischen molekularen verumreinigungen in einem gas
US6186140B1 (en) * 1997-03-14 2001-02-13 3M Innovative Properties Company Respiratory filter element having a storage device for keeping track of filter usage and a system for use therewith
US5937852A (en) * 1997-04-08 1999-08-17 The Board Of Regents Of The University Of Texas System Apparatus for induction of inhaled pharmacological agent by a pediatric patient
US6207460B1 (en) 1999-01-14 2001-03-27 Extraction Systems, Inc. Detection of base contaminants in gas samples
DE19911867C2 (de) * 1999-03-17 2002-02-21 T E M Techn Entwicklungen Und Sensorsystem zur Detektion von Gasen und Dämpfen in Luft
DE50014087D1 (de) 1999-03-17 2007-04-05 T E M Techn Entwicklungen Und Verfahren und sensorvorrichtung zur detektion von in luft enthaltenen gasen oder dämpfen
US6761169B2 (en) * 2000-08-17 2004-07-13 Vase Technology Bi/multi-directional filter cartridge and filter platform for mounting the cartridge thereon
US20060048777A1 (en) * 2003-03-21 2006-03-09 Interspiro, Inc. Apparatus and method for providing breathable air and bodily protection in a contaminated environment
US20040182394A1 (en) * 2003-03-21 2004-09-23 Alvey Jeffrey Arthur Powered air purifying respirator system and self contained breathing apparatus
US7647927B2 (en) * 2003-08-22 2010-01-19 Wilcox Industries Corp. Self-contained breathing system
US7100423B2 (en) * 2003-09-04 2006-09-05 Midwest Research Institute Method and apparatus for monitoring particles in a flowing gas
US20100139661A1 (en) * 2003-12-18 2010-06-10 Scott Technologies, Inc. Air breathing hose with integrated electrical wiring
US20070105494A1 (en) * 2005-11-08 2007-05-10 Esco Micro Pte Ltd Ductless fume hood with improved filter monitoring system and extended filter life
US8336543B2 (en) * 2009-05-22 2012-12-25 3M Innovative Properties Company Filter cartridge having cover for masking service life indicator
US8365723B2 (en) * 2009-05-22 2013-02-05 3M Innovative Properties Company Filter cartridge having cone of visibility for end-of-service-life-indicator (ESLI)
US8225782B2 (en) * 2009-05-22 2012-07-24 3M Innovative Properties Company Filter cartridge having location-registered view window for end-of-service-life-indicator (ESLI)
US8372186B2 (en) 2009-08-14 2013-02-12 Gregory J. Dobbyn Ductless fume hood gas monitoring and detection system
US9808655B2 (en) * 2010-02-26 2017-11-07 Zodiac Aerotechnics Method for determining partial pressure of a gaseous constituent and regulator of breathing mask for aircraft occupant
WO2011116428A1 (fr) 2010-03-25 2011-09-29 Resmed Paris Sas Dispositif de commande d'admission de gaz respirable pour appareil de traitement respiratoire
AU2011235303A1 (en) 2010-04-02 2012-11-01 3M Innovative Properties Company Filter systems including optical analyte sensors and optical readers
CA2806457A1 (fr) * 2010-08-06 2012-02-09 Scott Technologies, Inc. Procede et appareil d'integration de capteurs environnementaux et chimiques dans filtre de purification d'air par support de capteurs reutilisable
US8616205B2 (en) 2010-10-06 2013-12-31 Honeywell International Inc. Respirator with end-of-service-life detection
US9011584B2 (en) 2011-08-25 2015-04-21 Honeywell International Inc. End of service life indicator for respirator
US9079049B2 (en) 2011-11-02 2015-07-14 Honeywell International Inc. Respirators with a sacrificial cartridge for end of service life indication
BR112014014098A2 (pt) 2011-12-12 2017-06-13 3M Innovative Properties Co sistemas de indicação de fim de vida útil de cartuchos de filtro em camadas
US9283411B2 (en) 2013-04-19 2016-03-15 Honeywell International Inc. Gas sensing drift compensation using gas self-referencing for end of service life indication for respirators
EP2875847B1 (fr) * 2013-11-26 2020-03-11 Naphtachimie S.A. Dispositif sécurisé de protection respiratoire
US11235182B2 (en) 2014-09-05 2022-02-01 Honeywell International Inc. End of service life indicator for disposal mask
ITUB201594612U1 (it) * 2015-11-17 2017-05-17 Spasciani S P A Dispositivo di protezione individuale delle vie respiratorie provvisto di sistema di allarme.
GB2579210A (en) * 2018-11-23 2020-06-17 World Wide Welding Ltd Powered air personal respirator

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US1320935A (en) * 1919-11-04 schwartz
GB170404A (en) * 1920-07-20 1921-10-20 Leonard Angelo Levy A carbon monoxide respirator
US1474205A (en) * 1921-10-11 1923-11-13 Mine Safety Appliances Co Gas mask
AT155693B (de) * 1934-09-21 1939-03-10 Pirelli Vorrichtung zum Anzeigen des Erschöpfungszustandes von Gasfiltern und -schutzgeräten.
FR843542A (fr) * 1937-09-29 1939-07-05 Pirelli Dispositif pour la signalisation de l'épuisement des filtres antigaz
DE1721541U (de) * 1954-05-22 1956-05-03 Draegerwerk Ag Vorrichtung zur anzeige der erschoepfung eines atemfilters.
DE1120774B (de) * 1960-04-26 1961-12-28 Mine Safety Appliances Co Detektorzelle zum Messen der Konzentration einer Gaskomponente
US3902485A (en) * 1974-02-08 1975-09-02 Richard A Wallace Chemically activated warning system
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US4051006A (en) * 1976-03-22 1977-09-27 Beckman Instruments, Inc. Portable electrochemical cell structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677765A1 (fr) * 1991-06-17 1992-12-18 Commissariat Energie Atomique Procede de surveillance de l'etat de saturation d'une masse de charbon active filtrante d'un dispositif de filtration et cartouche de masque respiratoire en portant application.
WO1996012524A1 (fr) * 1994-10-24 1996-05-02 Minnesota Mining And Manufacturing Company Exposimetre
WO1996012523A1 (fr) * 1994-10-24 1996-05-02 Minnesota Mining And Manufacturing Company Exposimetre a signal d'alarme

Also Published As

Publication number Publication date
EP0246444B1 (fr) 1993-02-03
DE3783944D1 (de) 1993-03-18
EP0246444A3 (en) 1990-08-22
DE3613512A1 (de) 1987-10-29
US4873970A (en) 1989-10-17
DE3613512C3 (de) 1994-09-29
DE3613512C2 (fr) 1994-09-29

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