EP0447619B1 - Système d'alarme avec une cellule de mesure et signalisation d'alarme pour indiquer l'état d'usure d'un filtre à gaz - Google Patents

Système d'alarme avec une cellule de mesure et signalisation d'alarme pour indiquer l'état d'usure d'un filtre à gaz Download PDF

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Publication number
EP0447619B1
EP0447619B1 EP90121361A EP90121361A EP0447619B1 EP 0447619 B1 EP0447619 B1 EP 0447619B1 EP 90121361 A EP90121361 A EP 90121361A EP 90121361 A EP90121361 A EP 90121361A EP 0447619 B1 EP0447619 B1 EP 0447619B1
Authority
EP
European Patent Office
Prior art keywords
gas filter
flap piece
warning arrangement
warning
arrangement according
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.)
Expired - Lifetime
Application number
EP90121361A
Other languages
German (de)
English (en)
Other versions
EP0447619A1 (fr
Inventor
Detlef Hoffmann
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
Application filed by Auergesellschaft GmbH filed Critical Auergesellschaft GmbH
Priority to AT90121361T priority Critical patent/ATE97824T1/de
Publication of EP0447619A1 publication Critical patent/EP0447619A1/fr
Application granted granted Critical
Publication of EP0447619B1 publication Critical patent/EP0447619B1/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 with a measuring cell and alarm transmitters for displaying the state of exhaustion of a gas filter in connection with a breathing connection, the warning device being designed as a unit separate from the gas filter.
  • Such a warning device is already known from DE-A-36 13 512.
  • Optical and acoustic signal indicators are used in an electronic circuit arrangement as alarm devices, the measured value triggering the alarm being determined by means of an electrochemical measuring cell.
  • the use of optical and acoustic signals as alarm devices can be ignored or overlooked by the device wearer in the event of noise or poor visibility.
  • the object of the invention is therefore to create a warning device of the type mentioned at the outset which clearly and safely indicates to the device wearer the state of exhaustion of the gas filter even in the event of noise and poor visibility.
  • the warning device 1 essentially consists of a housing 2 into which a measuring cell 3, an electronic circuit 4 connected to it in terms of circuitry, a battery 5, a pivotable mechanical device 6 with a permanent magnet 7 and an electromagnetic interrupter 7 a is arranged.
  • the warning device 1 is flanged to an upright breathing tube 8 via a lateral opening 9 and is in flow connection with the breathing tube.
  • the breathing tube 8 is designed as a functional part for the warning device 1 and has a stop element 10 against which the pivotable flap piece 14 bears in an end position.
  • the breathing tube 8 with the warning device 1 is connected behind the latter in the flow direction 12 to indicate the state of exhaustion of a gas filter 11.
  • the direction of flow 12 is synonymous with the direction of the inhaled air.
  • the breathing tube 8 is connected in the flow direction with its opening 13 to a breathing tube, not shown in the drawing, with a breath connection.
  • the mechanical device 6, which is controlled via the measuring cell 3 and the electronic circuit 4, closes the flow cross section of the breathing tube 8 with its pivotable flap piece 14 when the gas filter 11 is exhausted and thus shows the wearer of the gas filter 11 by increasing the breathing resistance.
  • the mechanical device 6 consists essentially of a circular flap piece 14, an axis of rotation 15 which is fixed on the edge of the flap piece and a spring drive 16 which, when triggered, swings the flap piece into the breathing tube 8 against the stop element 10.
  • the flap piece 14 has a slightly smaller diameter than the inside diameter of the breathing tube 8. Concentric to the circular flap piece 14, an opening 17 is machined into it, through which the device wearer can breathe when the flap piece 14 closes the flow cross section of the breathing tube 8 in the event of an indication of exhaustion. The remaining cross-section of the opening 17 then causes the device wearer to increase the inhalation resistance. At one end of the axis of rotation 15, a lever 18 is arranged, on which the device carrier can manually pivot the flap piece 14 blocking the flow cross section of the breathing tube 8 into the starting position, ie to rest against the permanent magnet 7, so that the full flow cross section of the breathing tube 8 can be inhaled is available again. The increased inhalation resistance is then lower again for the device wearer.
  • the manual pivoting back of the flap piece 14 by means of the lever 18 corresponds to the acknowledgment of the triggered display of the state of exhaustion of the gas filter 11 which retains the harmful gases.
  • the device carrier thus warned can then leave the pollutant-containing room for the time to replace the gas filter, with sufficient time.
  • an electromotive drive (not shown in the drawing) for pivoting into the flow cross section of the breathing tube 8 can be provided on the flap piece 14, an acknowledgment switch (also not shown in the drawing) causing the flap piece 14 to pivot back electromotively.
  • Fig. 3 the electronic circuit arrangement of the warning device 1 is shown as a block diagram.
  • the measuring cell 3 is a signal amplifier 19 and this a threshold switch 20 and as an alarm, the mechanical device 6 according to the invention with the permanent magnet 7 and the electromagnetic interrupter 7 a downstream.
  • the battery 5 is provided with a battery monitor 21 for supplying power to the circuit arrangement.
  • the switching threshold of the threshold switch 20 is set to the measurement signal corresponding to the measurement value which triggers the alarm corresponds to a certain harmful gas concentration, which indicates the end of the period of use of the gas filter 11.
  • the measuring signal coming from the measuring cell 3 exceeds the set switching threshold (alarm threshold) of the threshold switch 20, its output is turned on and the electromagnetic interrupter 7 a is activated such that the magnet 7 is deactivated and the held flap piece 14 is released, which is then released by means of the
  • the spring drive 16 swings suddenly into the breathing tube 8 and comes to rest against the stop 10 in the end position.
  • the flap piece 14 closes the flow cross section of the breathing tube 8 and only the opening 17, which is worked in concentrically in the flap piece, remains as a passage for inhalation for the device wearer. Due to the relatively small opening 17, the inhalation resistance increases noticeably. This is then the sign for the equipment carrier that the gas filter 11 will be exhausted in a short time.
  • FIG. 4 shows a block diagram of the warning device 1, in which, in addition to the flap device 6 described above and connected in parallel to it, a light-emitting diode 22 is provided as an optical alarm transmitter and a signal transmitter 23 as an acoustic alarm transmitter.
  • An electrochemical measuring cell can be provided as the measuring cell 3, which works on the principle of electrochemical oxidation. It serves as a measuring element for the detection of harmful concentrations of harmful gas in the inhaled air, which can no longer be retained or removed by the gas filter 11 connected upstream of the measuring element in the event of being exhausted. In other words: the measuring element 3 measures a certain harmful pollutant concentration, which indicates that the pollutant retained in the gas filter 11 breaks through, which means that the gas filter is exhausted. Electrochemical measuring cells already exist 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.
  • a semiconductor sensor can be used as the measuring element, as a result of which a larger number of pollutants to be detected can advantageously be measured.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Fuel Cell (AREA)
  • Burglar Alarm Systems (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Claims (11)

  1. Dispositif d'alarme, comprenant une cellule de mesure et un avertisseur, en vue de l'indication de l'état d'épuisement d'un filtre anti-gaz en relation avec un raccordement respiratoire, le dispositif d'alarme étant construit comme une unité séparée du filtre anti-gaz, étant disposé sur un tube respiratoire (8) branché dans le sens du courant derrière le filtre anti-gaz (11), et étant relié au tube par l'intermédiaire du courant, caractérisé en ce que
    a) l'avertisseur est construit comme un dispositif (6) mécanique présentant un clapet (14) pivotant et déclenchable en fonction de l'état d'épuisement du filtre anti-gaz (11) mesuré par la cellule de mesure, et permettant la fermeture du tube respiratoire (8) dans la direction du courant, et
    b) le clapet (14) présente une ouverture (17) au travers de laquelle le porteur de l'ustensile respire, une augmentation perceptible de la résistance à l'inspiration constituant un indice d'un épuisement proche du filtre anti-gaz (11).
  2. Dispositif d'alarme selon la revendication 1, caractérisé en ce que le dispositif d'alarme (1) est disposé dans un logement (2) relié au sommet du tube respiratoire (8) par l'intermédiaire d'une ouverture (9) pratiquée dans le tube respiratoire.
  3. Dispositif d'alarme selon la revendication 1, caractérisé en ce que le tube respiratoire (8) est construit comme une pièce fonctionnelle du dispositif d'alarme (1), et présente un élément de butée (10) sur le côté de sortie (13) opposé au filtre anti-gaz (11), élément de butée contre lequel le clapet (14) pivotant s'arrête dans une position extrême.
  4. Dispositif d'alarme selon les revendications 1 à 3, caractérisé en ce que le clapet (14) est préférentiellement construit comme un disque circulaire présentant dans sa zone de bord un axe (15) de rotation ainsi qu'un ressort (16) de rappel.
  5. Dispositif d'alarme selon la revendication 1, caractérisé en ce que le dispositif (6) mécanique présente un aimant permanent (7) sur lequel est immobilisé en position de repos le clapet (14) pivotant.
  6. Dispositif d'alarme selon les revendications 1 et 5, caractérisé en ce que l'aimant permanent (7) présente un interrupteur (7a) relié à un branchement (4) électronique et qui désactive en cas d'alarme l'aimant permanent de sorte que ce dernier libère le clapet (14) pour le faire pivoter contre l'élément de butée (10) situé dans le tube respiratoire (8).
  7. Dispositif d'alarme selon les revendications 1 à 6, caractérisé en qu'un levier (18) est disposé sur l'axe de rotation (15) en relation avec le clapet (14), de sorte que le clapet peut être pivoté manuellement lorsque l'alarme s'est produite.
  8. Dispositif d'alarme selon les revendications 1 à 3, caractérisé en ce qu'un dispositif d'entraînement de préférence électromoteur est disposé sur le clapet (14) pour le pivotement de ce dernier dans la section transversale du courant du tube respiratoire (8), et en ce qu'un interrupteur de confirmation d'ordre est prévu afin de faire basculer à nouveau le clapet par énergie électromotrice.
  9. Dispositif d'alarme comportant un branchement électronique qui présente une cellule de mesure accouplée avec un branchement de valeur seuil dont le seuil est réglable en fonction d'un signal de mesure correspondant à la valeur de mesure déclenchable, selon la revendication 1, caractérisé en ce que l'aimant permanent (7) comportant l'interrupteur électromécanique (7a) est en relation avec le dispositif mécanique (6), et connecté à la sortie du branchement de valeur seuil (20).
  10. Dispositif d'alarme selon les revendications 1 et 8, caractérisé en ce que la cellule de mesure (3) est de préférence une cellule de mesure électrochimique.
  11. Dispositif d'alarme selon les revendications 1 et 8, caractérisé en ce que dans la cellule de mesure (3), on peut inclure préférentiellement en tant qu'élément de mesure, un capteur à semi-conducteur.
EP90121361A 1990-03-21 1990-11-08 Système d'alarme avec une cellule de mesure et signalisation d'alarme pour indiquer l'état d'usure d'un filtre à gaz Expired - Lifetime EP0447619B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90121361T ATE97824T1 (de) 1990-03-21 1990-11-08 Warneinrichtung mit einer messzelle und alarmgebern zur anzeige des erschoepfungszustandes eines gasfilters.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009107A DE4009107A1 (de) 1990-03-21 1990-03-21 Warneinrichtung mit einer messzelle und alarmgebern zur anzeige des erschoefpungszustandes eines gasfilters
DE4009107 1990-03-21

Publications (2)

Publication Number Publication Date
EP0447619A1 EP0447619A1 (fr) 1991-09-25
EP0447619B1 true EP0447619B1 (fr) 1993-12-01

Family

ID=6402758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90121361A Expired - Lifetime EP0447619B1 (fr) 1990-03-21 1990-11-08 Système d'alarme avec une cellule de mesure et signalisation d'alarme pour indiquer l'état d'usure d'un filtre à gaz

Country Status (4)

Country Link
EP (1) EP0447619B1 (fr)
AT (1) ATE97824T1 (fr)
DE (2) DE4009107A1 (fr)
NO (1) NO905329L (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU645959B3 (en) * 1993-11-05 1994-01-27 Purecab (Australia) Pty Ltd Respiratory filter indicator
US5666949A (en) * 1994-10-24 1997-09-16 Minnesota Mining And Manufacturing Company Exposure indicator with continuous alarm signal indicating multiple conditions
US5659296A (en) * 1994-10-24 1997-08-19 Minnesota Mining And Manufacturing Company Exposure indicating apparatus
DE29504087U1 (de) * 1995-03-10 1995-08-10 Palocz Andresen Michael Dr Ing Mikro-Meßvorrichtung für die Erfassung der Beladung von Filtern
AUPN191095A0 (en) * 1995-03-23 1995-04-27 Safety Equipment Australia Pty Ltd Positive air-purifying respirator management system
DE19650897A1 (de) * 1996-12-07 1998-06-10 T E M Tech Entwicklung Und Man Apparat und Verfahren zur Erhöhung der Sicherheit von Atemschutzmasken
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
EP1165186B1 (fr) 1999-03-17 2007-02-21 T.E.M.! Technische Entwicklungen und Management GmbH Procede et dispositif capteur pour la detection de gaz ou de vapeurs contenus dans l'air
DE19911867C2 (de) * 1999-03-17 2002-02-21 T E M Techn Entwicklungen Und Sensorsystem zur Detektion von Gasen und Dämpfen in Luft

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1676125A (en) * 1928-07-03 Device for indicating admixtures to gases and liquids
DE670550C (de) * 1929-04-10 1939-01-20 Bernh Draeger Sauerstoffatemschutzgeraet
DE693685C (de) * 1935-11-19 1940-07-17 Auergesellschaft Akt Ges Warnvorrichtung fuer Sauerstoffatemschutzgeraete
FR1353343A (fr) * 1963-04-09 1964-02-21 Avertisseur pour appareils protecteurs des voies respiratoires
DE3613512C3 (de) * 1986-04-22 1994-09-29 Auergesellschaft Gmbh Elektrische Warneinrichtung zur Anzeige des Erschöpfungszustandes eines Schadgase zurückhaltenden Gasfilters

Also Published As

Publication number Publication date
DE59003710D1 (de) 1994-01-13
DE4009107A1 (de) 1991-09-26
EP0447619A1 (fr) 1991-09-25
ATE97824T1 (de) 1993-12-15
NO905329L (no) 1991-09-23
NO905329D0 (no) 1990-12-10
DE4009107C2 (fr) 1993-06-09

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