EP1861173B1 - Procede et dispositif pour determiner la capacite restante d'air pouvant etre respire dans un appareil respiratoire filtrant generant de l'oxygene et fonctionnant par cycles - Google Patents

Procede et dispositif pour determiner la capacite restante d'air pouvant etre respire dans un appareil respiratoire filtrant generant de l'oxygene et fonctionnant par cycles Download PDF

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Publication number
EP1861173B1
EP1861173B1 EP06722697A EP06722697A EP1861173B1 EP 1861173 B1 EP1861173 B1 EP 1861173B1 EP 06722697 A EP06722697 A EP 06722697A EP 06722697 A EP06722697 A EP 06722697A EP 1861173 B1 EP1861173 B1 EP 1861173B1
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EP
European Patent Office
Prior art keywords
inhalation
residual capacity
air
evaluation
display unit
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
EP06722697A
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German (de)
English (en)
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EP1861173A1 (fr
Inventor
Frank Krüger
Karl-Heinz Feldner
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.)
MSA Auer GmbH
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MSA Auer GmbH
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Publication date
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Publication of EP1861173A1 publication Critical patent/EP1861173A1/fr
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Publication of EP1861173B1 publication Critical patent/EP1861173B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/08—Respiratory apparatus containing chemicals producing oxygen

Definitions

  • the invention relates to a method for determining the residual capacity of respirable air for an oxygen-generating, circulatory operated respirator with at least one chemical canister connected to an exhalation bag with integrated blower and an inhalation bag with inhalation hose, and an arrangement for carrying out the method.
  • Such a circulatory respirator with a consumption indicator for the still remaining veratembare air volume during the period of use is for example from the DE 44 11 560 known.
  • An exhalation valve is followed by an exhalation bag in which a blower is housed.
  • the exhaled air is forced by means of the blower through two parallel chemical canisters.
  • the chemical granules contained in the chemical canisters bind some of the carbon dioxide contained in the exhaled air and convert it into oxygen in an exothermic reaction.
  • the oxygen-enriched air passes through a particle filter in the inhalation bag and an inhalation valve to the user.
  • the operated as insulating, oxygen-generating respirator can - for example, in operations of fire or mine rescue - on a much longer period than conventional SCBA are used. For example, use times of four hours are conceivable, based on a specific - average - tidal volume, of 301 / min. Since the stated usage time is very inaccurate based on an assumed average of the user's respiratory volume per minute (respiratory minute volume) DE 44 11 560 already suggested a coupled to the fan consumption meter. On the basis of the measured blower parameters, the still existing supply of usable respiratory gas is determined with the aid of an evaluation unit.
  • the consumption display determined in the known devices with the aid of the blower parameters is inaccurate, since the consumption of the chemical or the respiratory gas requirement or the respiratory volume per minute is different for the different users and for another is substantially dependent on the burden of the user, that is Conditions of use or breathing, and the temperature determines the volume actually breathed.
  • the consumption display determined on the basis of the blower parameters must be recalibrated during the repair after each use.
  • the repair can not be carried out immediately, but only at a temperature of the blower below 30 ° C.
  • the invention is therefore based on the object, a method and an arrangement for determining the residual capacity of respirable air for a circulating, oxygen-generating respirator in such a way that during use under the prevailing conditions exact, individual values on the respective Time still available breathing air to be displayed.
  • the object is achieved with a method according to the features of patent claim 1 and an arrangement for carrying out the method according to the features of patent claim 7.
  • Advantageous embodiments of the invention are listed in the subclaims.
  • the essence of the invention consists in determining the pressure profile and the temperature of the inhaled air when inhaling the user, wherein the pressure level and the number of breaths determined at constant, predetermined time intervals and calculated taking into account the temperature actually in the respective time interval inhaled air volume and subtracting the chemical canister of the respirator from the original capacity after each time interval from the previous value of the remaining respiratory air capacity.
  • the remaining residual capacity of respirable air is displayed - preferably as a percentage - at any time of use of the respirator on the basis of actually consumed by the user air and thus offers this a high level of security.
  • the consumption indicator is independent of the respiratory equipment changes and can be immediately prepared for subsequent use without calibration and independent of the temperature and then used.
  • the duration of a time interval is preferably twenty seconds.
  • a fixed value of 201 / min is used for the calculation.
  • the arrangement according to the invention for carrying out the method comprises a sensor unit integrated in the inhalation hose of the respiratory protective device with a pressure sensor for determining the pressure profile and a temperature sensor for measuring the temperature of the inhaled air which is strongly influenced by the exothermic reaction in the chemical canisters.
  • the sensor unit Via a distributor unit, the sensor unit is connected to an evaluation and display unit.
  • the respiratory volume corresponding to the respective temperature is determined for the respective time interval with the determined number of breaths and their respective pressure levels. This value is subtracted in the evaluation and display unit of the starting capacity or remaining after the previous time interval residual capacity.
  • the evaluation and display unit displays the respectively determined residual capacity on a display.
  • the evaluation and display unit is a dead man's warning and also a fault indicator that relates to the power source, electrical connections, the fan or the starter, and a signal generator for generating a signal when certain residual capacities are installed.
  • the respiratory protective device comprises two parallel disposed chemical canisters 1, which are connected via an air distributor 2 to an exhalation bag 3 with housed in this blower 4. In the wall of the exhalation bag 3, an excess valve 5 is integrated. To the exhalation bag 3 an exhalation hose 6 is connected with exhalation valve 7.
  • the chemical canisters 1 are provided with a cooling jacket 8 and filled with a potassium peroxide granules (KO 2 ) 21.
  • a connecting tube 9 connects the exits of the two chemical canisters 1 via a particle filter 10 with an inhalation bag 11.
  • In the inhalation bag 11 opens a inhalation tube 12 with inhalation valve 13.
  • the exhalation valve 7 and the inhalation valve 13 are connected to a valve control (not shown).
  • the enriched with carbon dioxide expiratory air flows through the opened exhalation valve 7 (with closed inhalation valve 13) in the exhalation bag 3 and is pressed by means of the blower 4 via the air manifold 2 through the filled with KO 2 granules 21 Chemistalkanister 1.
  • carbon dioxide contained in the exhaled air is converted into oxygen in an exothermic reaction with the potassium hyperoxide.
  • the oxygen-enriched air thus treated passes via the connecting pipe 9 and the particle filter 10, in which fine particles entrained in the chemical are retained, into the inhalation bag 11 and from there via the now opened inhalation valve 13 and the inhalation hose 12 to the user.
  • the respirator also has an energy source 14 and a distribution unit connected thereto 15.
  • a sensor unit 19 and an evaluation and display unit 20 are connected to the distribution unit 15.
  • the sensor unit 19, which is associated with the inhalation hose 12, has a pressure sensor and a temperature sensor (not shown in each case).
  • the operating time of the above-described Oxygen Generating Respirator is four hours for the size of the two chemical canisters 1 used herein, which can deliver a total of at least 7200 liters of respirable air.
  • the time of use can be both significantly longer or significantly shorter, since it depends to a considerable extent on the particular conditions of use and the physique of the user in question, that is, the type of respiration.
  • the inhalation resistance in the inhalation tube 12 is measured in the form of the pressure curve, and at intervals of 20 seconds, the respiratory resistance is measured in the form of the maximum height of the breaths and determines their number.
  • the respective residual capacity is calculated as a percentage and thus displayed on the display of the evaluation and display unit 20.
  • the user receives at any time of its use information about the actually consumed by him under the prevailing conditions respiratory volume or about the time remaining veratembare air volume.
  • the residual capacity can also be displayed in the form of a pictorial representation of a "bottle filling" on the display.
  • the evaluation and display unit 20 When a certain residual capacity is reached or fallen below, the evaluation and display unit 20 generates a visual and / or acoustic signal with a signal generator.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Emergency Medicine (AREA)
  • General Chemical & Material Sciences (AREA)
  • Pulmonology (AREA)
  • Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Multiple Motors (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Claims (12)

  1. Procédé de détermination de la capacité restante d'air pouvant être respiré dans un appareil de protection respiratoire fonctionnant par cycles, produisant de l'oxygène, comportant au moins une cartouche chimique, qui est raccordée à un sac d'air exhalé avec souffleur intégré dans celui-ci et à un sac d'air inhalé avec un tuyau flexible d'inhalation, caractérisé en ce que la courbe de pression et la température de l'air inhalé sont déterminées individuellement pendant l'emploi lors de l'inhalation de l'utilisateur ainsi que la hauteur de pression et le nombre de mouvements respiratoires à des intervalles de temps prescrits et, en se basant sur cela tout en prenant en compte la température du gaz inhalé, le volume d'air respiré pendant l'intervalle de temps respectif est calculé et est ensuite soustrait du volume de sortie de la cartouche chimique.
  2. Procédé selon la revendication 1, caractérisé en ce que la capacité restante est calculée et affichée comme un pourcentage.
  3. Procédé selon la revendication 1, caractérisé en ce que la capacité restante est représentée figurativement sous la forme du degré de remplissage d'une bouteille.
  4. Procédé selon la revendication 1, caractérisé en ce que, lorsqu'une capacité restante déterminée est atteinte, un signal d'alerte est généré.
  5. Procédé selon la revendication 1, caractérisé en ce que la durée d'un intervalle de temps correspond à vingt secondes.
  6. Procédé selon la revendication 1, caractérisé en ce que, lors,d'une respiration extrêmement réduite ou d'une absence de respiration, un volume de respiration de 201/min est fixé afin de déterminer la capacité restante.
  7. Dispositif pour mettre en oeuvre le procédé selon la revendication 1, pour un appareil de protection respiratoire produisant de l'oxygène, fonctionnant par cycles, comportant au moins une cartouche chimique, qui est raccordée à un sac d'air exhalé avec souffleur intégré dans celui-ci et à un sac d'air inhalé avec tuyau flexible d'inhalation, caractérisé par une unité de capteur (19) coordonnée au tuyau flexible d'inhalation (12), comportant un capteur de pression pour déterminer la courbe de pression lors de l'inhalation et un capteur de température pour mesurer la température de l'air inhalé, ainsi qu'une unité d'évaluation et d'affichage (20) reliée par une unité de distributeur (15) à l'unité de capteur (19) afin de déterminer le nombre de mouvements respiratoires à des intervalles de temps prescrits, les pressions maximales des mouvements respiratoires et la température de l'air inhalé ainsi que calculer le volume d'air inhalé dans l'unité de temps de l'utilisateur respectif et la capacité restante de volume d'air pouvant être respiré restant encore disponible au moment respectif.
  8. Dispositif selon la revendication 7, caractérisé en ce que l'unité d'évaluation et d'affichage (20) présente un écran pour restituer en pourcentage ou figurativement la capacité restante du volume d'air pouvant être respiré.
  9. Dispositif selon la revendication 8, caractérisé en ce que l'unité d'évaluation et d'affichage (20) présente un générateur de signaux pour la signalisation optique et/ou acoustique de capacités restantes déterminées.
  10. Dispositif selon la revendication 7, caractérisé en ce que une source d'énergie (12) et une douille de chargeur (18) ainsi qu'un démarrage automatique (16), une fonction de démarrage rapide (17) et le souffleur (4) sont raccordés à l'unité de distributeur (15).
  11. Dispositif selon la revendication 7, caractérisé en ce que une alerte de Totmann est intégrée à l'unité d'évaluation et d'affichage (20).
  12. Dispositif selon la revendication 7, caractérisé en ce que l'unité d'évaluation et d'affichage (20) présente un affichage d'erreur en ce qui concerne la capacité de la source d'énergie (14), des connexions manquantes ou défectueuses et une fonction de démarrage rapide (17) manquante ou usée.
EP06722697A 2005-03-25 2006-03-23 Procede et dispositif pour determiner la capacite restante d'air pouvant etre respire dans un appareil respiratoire filtrant generant de l'oxygene et fonctionnant par cycles Expired - Lifetime EP1861173B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005015275A DE102005015275B3 (de) 2005-03-25 2005-03-25 Verfahren und Anordnung zur Ermittlung der Restkapazität an veratembarer Luft für ein Sauerstoff erzeugendes, im Kreislauf betriebenes Atemschutzgerät
PCT/DE2006/000545 WO2006099863A1 (fr) 2005-03-25 2006-03-23 Procede et dispositif pour determiner la capacite restante d'air pouvant etre respire dans un appareil respiratoire filtrant generant de l'oxygene et fonctionnant par cycles

Publications (2)

Publication Number Publication Date
EP1861173A1 EP1861173A1 (fr) 2007-12-05
EP1861173B1 true EP1861173B1 (fr) 2008-08-13

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EP06722697A Expired - Lifetime EP1861173B1 (fr) 2005-03-25 2006-03-23 Procede et dispositif pour determiner la capacite restante d'air pouvant etre respire dans un appareil respiratoire filtrant generant de l'oxygene et fonctionnant par cycles

Country Status (7)

Country Link
EP (1) EP1861173B1 (fr)
CN (1) CN101180100B (fr)
AT (1) ATE404253T1 (fr)
AU (1) AU2006226722B2 (fr)
DE (2) DE102005015275B3 (fr)
ES (1) ES2313628T3 (fr)
WO (1) WO2006099863A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102114287B (zh) * 2009-12-31 2012-10-03 北京谊安医疗系统股份有限公司 呼吸机及其氧浓度检测装置和方法
RU2554793C2 (ru) * 2011-02-28 2015-06-27 Кокен Лтд. Воздухоочистительное устройство и способ прогнозирования времени проскока для такого устройства
GB2494163A (en) 2011-09-01 2013-03-06 Draeger Safety Uk Ltd Closed circuit breathing apparatus and method of operating the same
DE102012002546B4 (de) 2012-02-09 2016-11-24 Dräger Safety AG & Co. KGaA Beatmungssystem
US9504797B2 (en) * 2013-12-31 2016-11-29 General Electric Company System and method of predicting CO2 breakthrough and absorbent replacement
DE102014017634B4 (de) * 2014-11-27 2018-02-08 Dräger Safety AG & Co. KGaA Kreislaufatemgerät mit einer Messeinrichtung zur Bestimmung von Gasmengen in dem Kreislaufatemgerät
CN106913965A (zh) * 2015-12-25 2017-07-04 金万善 一种呼吸器
CN110465013B (zh) * 2019-08-15 2020-12-29 深圳市荣盛智能装备有限公司 空气呼吸器的剩余使用时间的检测方法、装置及存储介质
CN113616948A (zh) * 2020-05-09 2021-11-09 北京安氧特科技有限公司 一种正压弹簧和风机双增压长效正压式化学氧作业呼吸器

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US1474205A (en) * 1921-10-11 1923-11-13 Mine Safety Appliances Co Gas mask
DE2603530A1 (de) * 1976-01-28 1977-08-04 Auergesellschaft Gmbh Atemschutzgeraet
US4350662A (en) * 1981-01-22 1982-09-21 The United States Of America As Represented By The Secretary Of The Navy Carbon dioxide absorbent canister with breathing gas temperature and flow control
US4876903A (en) * 1988-01-11 1989-10-31 Budinger William D Method and apparatus for determination and display of critical gas supply information
US5157378A (en) * 1991-08-06 1992-10-20 North-South Corporation Integrated firefighter safety monitoring and alarm system
DE4411560C1 (de) * 1994-04-02 1995-08-03 Auergesellschaft Gmbh Chemikalsauerstoffgerät
US6543444B1 (en) * 2000-04-10 2003-04-08 John E. Lewis System and method for air time remaining calculations in a self-contained breathing apparatus
AU2002222831A1 (en) * 2000-10-31 2002-05-15 Marat Vadimovich Evtukhov Integral life support system
CN2553816Y (zh) * 2002-07-04 2003-06-04 中国人民解放军第一五三中心医院 医用输氧监护仪

Also Published As

Publication number Publication date
DE502006001335D1 (de) 2008-09-25
AU2006226722B2 (en) 2010-10-28
EP1861173A1 (fr) 2007-12-05
ES2313628T3 (es) 2009-03-01
AU2006226722A1 (en) 2006-09-28
CN101180100B (zh) 2011-05-25
DE102005015275B3 (de) 2006-09-28
CN101180100A (zh) 2008-05-14
ATE404253T1 (de) 2008-08-15
WO2006099863A1 (fr) 2006-09-28

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