EP0447619A1 - Warning system with a measuring cell and alarm signal to indicate the condition of a gas filter - Google Patents
Warning system with a measuring cell and alarm signal to indicate the condition of a gas filter Download PDFInfo
- Publication number
- EP0447619A1 EP0447619A1 EP90121361A EP90121361A EP0447619A1 EP 0447619 A1 EP0447619 A1 EP 0447619A1 EP 90121361 A EP90121361 A EP 90121361A EP 90121361 A EP90121361 A EP 90121361A EP 0447619 A1 EP0447619 A1 EP 0447619A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- warning device
- gas filter
- flap piece
- breathing tube
- measuring cell
- 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
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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
Abstract
Description
Die Erfindung bezieht sich auf eine Warneinrichtung mit einer Meßzelle und Alarmgebern zur Anzeige des Erschöpfungszustandes eines Gasfilters in Verbindung mit einem Atemanschluß, wobei die Warneinrichtung als eine vom Gasfilter getrennte Einheit ausgebildet ist.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.
Eine derartige Warneinrichtung ist bereits aus der DE 36 13 512 C2 bekannt. Hierbei werden als Alarmgeber optische und akustische Signalanzeiger in einer elektronischen Schaltungsanordnung verwendet, wobei der den alarmauslösende Meßwert mittels einer elektrochemischen Meßzelle ermittelt wird. Die Verwendung von optischen und akustischen Signalen als Alarmgeber, kann vom Gerätträger bei Lärm oder bei schlechten Sichtverhältnissen überhört oder übersehen werden.Such a warning device is already known from DE 36 13 512 C2. 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.
Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Warneinrichtung der eingangs genannten Art zu schaffen, die eindeutig und sicher dem Gerätträger auch bei Lärm und schlechter Sicht den Erschöpfungszustand des Gasfilters anzeigt.The invention is therefore based on the object of providing 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.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the characterizing features of patent claim 1.
Vorteilhafte Weiterentwicklungen sind in den abhängigen Ansprüchen gekennzeichnet.Advantageous further developments are characterized in the dependent claims.
Ein Ausführungsbeispiel des Erfindungsgegenstandes ist in der Zeichnung dargestellt. Es zeigen:
- Fig. 1
- eine Seitenansicht der Warneinrichtung, die in Strömungsrichtung hinter einem Gasfilter angeordnet ist,
- Fig. 2
- eine Draufsicht nach Fig. 1,
- Fig. 3
- eine Ausführung der Warneinrichtung als Blockschaltbild und
- Fig. 4
- eine andere Ausführung der Warneinrichtung als Blockschaltbild
Wie aus den Figuren 1 und 3 ersichtlich ist, besteht die Warneinrichtung 1 im wesentlichen aus einem Gehäuse 2, in das eine
Die über die
In einer anderen Ausführung kann an dem
- Fig. 1
- 2 shows a side view of the warning device which is arranged behind a gas filter in the direction of flow,
- Fig. 2
- 2 shows a top view according to FIG. 1,
- Fig. 3
- an execution of the warning device as a block diagram and
- Fig. 4
- another version of the warning device as a block diagram
As can be seen from FIGS. 1 and 3, the warning device 1 essentially consists of a housing 2 into which a
The
In another embodiment, an electromotive drive (not shown in the drawing) for pivoting into the flow cross section of the
In Fig. 3 ist die elektronische Schaltungsanordnung der Warneinrichtung 1 als Blockschaltbild dargestellt. Der Meßzelle 3 ist ein Signalverstärker 19 und diesem ein Schwellwertschalter 20 sowie als Alarmgeber die erfindungsgemäße mechanische Vorrichtung 6 mit dem Permanentmagnet 7 und dem elektromagnetischen Unterbrecher 7 a nachgeschaltet. Zur Energieversorgung der Schaltungsanordnung ist die Batterie 5 mit einer Batterieüberwachung 21 vorgesehen. Die Schaltschwelle des Schwellwertschalters 20 ist auf das den alarmauslösenden Meßwert entsprechende Meßsignal eingestellt, das einer bestimmten Schadgaskonzentration entspricht, die das Ende der Gebrauchszeit des Gasfilters 11 anzeigt. Überschreitet beispielsweise das von der Meßzelle 3 kommende Meßsignal die eingestellte Schaltschwelle (Alarmschwelle) des Schwellwertschalters 20, so wird dessen Ausgang leitend und der elektromagnetische Unterbrecher 7 a derart aktiviert, daß der Magnet 7 deaktiviert wird und das festgehaltene Klappenstück 14 freigibt, das dann mittels des Federantriebs 16 schlagartig in das Atemrohr 8 einschwenkt und in der Endstellung gegen den Anschlag 10 zu liegen kommt. Das Klappenstück 14 verschließt den Strömungsquerschnitt des Atemrohrs 8 und es verbleibt lediglich die konzentrisch im Klappenstück eingearbeitete Öffnung 17 als Durchlaß zum Einatmen für den Gerätträger. Durch die verhältnismäßig kleine Öffnung 17 steigt der Einatemwiderstand merklich an. Das ist dann das Zeichen für den Gerätträger, daß das Gasfilter 11 in kurzer Zeit erschöpft sein wird.In Fig. 3 the electronic circuit arrangement of the warning device 1 is shown as a block diagram. The
Fig. 4 zeigt ein Blockschaltbild der Warneinrichtung 1, in dem als Alarmgeber zusätzlich zu der vorstehend beschriebenen Klappenvorrichtung 6, zu dieser parallel geschaltet, eine Leuchtdiode 22 als optischer Alarmgeber und ein Signalgeber 23 als akustischer Alarmgeber vorgesehen ist.
Als Meßzelle 3 kann eine elektrochemische Meßzelle vorgesehen werden, die nach dem Prinzip der elektrochemischen Oxidation arbeitet. Sie dient als Meßelement zum Nachweis schädlicher Schadgaskonzentrationen in der Einatemluft, die von dem dem Meßelement vorgeschalteten Gasfilter 11 im Falle des Erschöpfungszustandes nicht mehr zurückgehalten bzw. entfernt werden kann. Mit anderen Worten: das Meßelement 3 mißt eine bestimmte schädliche Schadstoffkonzentration, die anzeigt, daß der im Gasfilter 11 zurückgehaltene Schadstoff durchbricht, was heißt, daß das Gasfilter erschöpft ist.
Elektrochemische Meßzellen gibt es bereits zum Nachweis von Kohlenmonoxid, Chlor, Schwefelwasserstoff, Blausäure und Sauerstoff, die in die Warneinrichtung 1 für die entsprechenden Gasfilter eingesetzt werden können.FIG. 4 shows a block diagram of the warning device 1, in which, in addition to the
An electrochemical measuring cell can be provided as the measuring
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.
Alternativ zu der oben genannten elektrochemischen Meßzelle kann ein Halbleiter-Sensor als Meßelement eingesetzt werden, wodurch vorteilhaft eine größere Anzahl von nachzuweisenden Schadstoffen gemessen werden kann.As an alternative to the above-mentioned electrochemical measuring cell, 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.
Claims (11)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90121361T ATE97824T1 (en) | 1990-03-21 | 1990-11-08 | WARNING DEVICE WITH A MEASURING CELL AND ALARM SENSOR FOR INDICATION OF THE DEPLETION CONDITION OF A GAS FILTER. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4009107A DE4009107A1 (en) | 1990-03-21 | 1990-03-21 | WARNING DEVICE WITH A MEASURING CELL AND ALARMS TO INDICATE THE DEFAULT OF A GAS FILTER |
DE4009107 | 1990-03-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0447619A1 true EP0447619A1 (en) | 1991-09-25 |
EP0447619B1 EP0447619B1 (en) | 1993-12-01 |
Family
ID=6402758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90121361A Expired - Lifetime EP0447619B1 (en) | 1990-03-21 | 1990-11-08 | Warning system with a measuring cell and alarm signal to indicate the condition of a gas filter |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0447619B1 (en) |
AT (1) | ATE97824T1 (en) |
DE (2) | DE4009107A1 (en) |
NO (1) | NO905329L (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU645959B3 (en) * | 1993-11-05 | 1994-01-27 | Purecab (Australia) Pty Ltd | Respiratory filter indicator |
WO1996012524A1 (en) * | 1994-10-24 | 1996-05-02 | Minnesota Mining And Manufacturing Company | Exposure indicating apparatus |
WO1996012523A1 (en) * | 1994-10-24 | 1996-05-02 | Minnesota Mining And Manufacturing Company | Exposure indicator with alarm signal |
EP0814872A1 (en) * | 1995-03-23 | 1998-01-07 | Safety Equipment Australia Pty. Ltd. | Powered air-purifying respirator management system |
WO1998024516A1 (en) * | 1996-12-07 | 1998-06-11 | T.E.M. Technische Entwicklung Und Management Gmbh | Improvements to gas-masks |
WO2000054840A1 (en) | 1999-03-17 | 2000-09-21 | T.E.M.! Technische Entwicklungen Und Management Gmbh | Method and sensor device for detecting gases or fumes in air |
DE19911867A1 (en) * | 1999-03-17 | 2000-10-19 | T E M Tech Entwicklungen Und M | Detection of gases or vapors in air involves using a sensor element having a gas sensitive layer and heated by using an electric heater |
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 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29504087U1 (en) * | 1995-03-10 | 1995-08-10 | Palocz Andresen Michael Dr Ing | Micro measuring device for the detection of the loading of filters |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1676125A (en) * | 1928-07-03 | Device for indicating admixtures to gases and liquids | ||
FR1353343A (en) * | 1963-04-09 | 1964-02-21 | Alarm for respiratory protection devices | |
DE3613512A1 (en) * | 1986-04-22 | 1987-10-29 | Auergesellschaft Gmbh | WARNING DEVICE TO INDICATE THE EXHAUST OF A POLLUTANT GAS FILTER |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE670550C (en) * | 1929-04-10 | 1939-01-20 | Bernh Draeger | Oxygen breathing apparatus |
DE693685C (en) * | 1935-11-19 | 1940-07-17 | Auergesellschaft Akt Ges | Warning device for oxygen breathing apparatus |
-
1990
- 1990-03-21 DE DE4009107A patent/DE4009107A1/en active Granted
- 1990-11-08 AT AT90121361T patent/ATE97824T1/en not_active IP Right Cessation
- 1990-11-08 DE DE90121361T patent/DE59003710D1/en not_active Expired - Fee Related
- 1990-11-08 EP EP90121361A patent/EP0447619B1/en not_active Expired - Lifetime
- 1990-12-10 NO NO90905329A patent/NO905329L/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1676125A (en) * | 1928-07-03 | Device for indicating admixtures to gases and liquids | ||
FR1353343A (en) * | 1963-04-09 | 1964-02-21 | Alarm for respiratory protection devices | |
DE3613512A1 (en) * | 1986-04-22 | 1987-10-29 | Auergesellschaft Gmbh | WARNING DEVICE TO INDICATE THE EXHAUST OF A POLLUTANT GAS FILTER |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU645959B3 (en) * | 1993-11-05 | 1994-01-27 | Purecab (Australia) Pty Ltd | Respiratory filter indicator |
WO1996012524A1 (en) * | 1994-10-24 | 1996-05-02 | Minnesota Mining And Manufacturing Company | Exposure indicating apparatus |
WO1996012523A1 (en) * | 1994-10-24 | 1996-05-02 | Minnesota Mining And Manufacturing Company | Exposure indicator with alarm signal |
US5659296A (en) * | 1994-10-24 | 1997-08-19 | Minnesota Mining And Manufacturing Company | Exposure indicating apparatus |
US5666949A (en) * | 1994-10-24 | 1997-09-16 | Minnesota Mining And Manufacturing Company | Exposure indicator with continuous alarm signal indicating multiple conditions |
EP0814872A4 (en) * | 1995-03-23 | 2001-07-11 | Safety Equipment Sweden Ab | Powered air-purifying respirator management system |
EP0814872A1 (en) * | 1995-03-23 | 1998-01-07 | Safety Equipment Australia Pty. Ltd. | Powered air-purifying respirator management system |
WO1998024516A1 (en) * | 1996-12-07 | 1998-06-11 | T.E.M. Technische Entwicklung Und Management Gmbh | Improvements to gas-masks |
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 |
WO2000054841A1 (en) | 1999-03-17 | 2000-09-21 | T.E.M.! Technische Entwicklungen Und Management Gmbh | Sensor device and method of detecting gases or fumes in air |
DE19911867A1 (en) * | 1999-03-17 | 2000-10-19 | T E M Tech Entwicklungen Und M | Detection of gases or vapors in air involves using a sensor element having a gas sensitive layer and heated by using an electric heater |
WO2000054840A1 (en) | 1999-03-17 | 2000-09-21 | T.E.M.! Technische Entwicklungen Und Management Gmbh | Method and sensor device for detecting gases or fumes in air |
DE19911867C2 (en) * | 1999-03-17 | 2002-02-21 | T E M Techn Entwicklungen Und | Sensor system for the detection of gases and vapors in air |
Also Published As
Publication number | Publication date |
---|---|
NO905329D0 (en) | 1990-12-10 |
DE4009107C2 (en) | 1993-06-09 |
NO905329L (en) | 1991-09-23 |
DE59003710D1 (en) | 1994-01-13 |
EP0447619B1 (en) | 1993-12-01 |
ATE97824T1 (en) | 1993-12-15 |
DE4009107A1 (en) | 1991-09-26 |
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