EP0818217B1 - Atemschutzgerät mit geschlossenem Kreislauf - Google Patents

Atemschutzgerät mit geschlossenem Kreislauf Download PDF

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Publication number
EP0818217B1
EP0818217B1 EP19970401679 EP97401679A EP0818217B1 EP 0818217 B1 EP0818217 B1 EP 0818217B1 EP 19970401679 EP19970401679 EP 19970401679 EP 97401679 A EP97401679 A EP 97401679A EP 0818217 B1 EP0818217 B1 EP 0818217B1
Authority
EP
European Patent Office
Prior art keywords
gas
breathed
false lung
lung
false
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
EP19970401679
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English (en)
French (fr)
Other versions
EP0818217A1 (de
Inventor
Yves Le Masson
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.)
Commeinhes Remco
Original Assignee
Commeinhes Remco
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 Commeinhes Remco filed Critical Commeinhes Remco
Publication of EP0818217A1 publication Critical patent/EP0818217A1/de
Application granted granted Critical
Publication of EP0818217B1 publication Critical patent/EP0818217B1/de
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
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/003—Means for influencing the temperature or humidity of the breathing gas
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/10—Respiratory apparatus with filter elements

Definitions

  • the invention relates to a breathing apparatus made of closed circuit
  • Respirators in a closed circuit where the exhaled air is regenerated by an appropriate substance, generally KO 2 (super potassium oxide), are well known and are distinguished from each other by the means used to level the temperature very high of the gases regenerated by the reaction, strongly exothermic, which transforms carbon dioxide into oxygen.
  • a device of this type essentially consists of a 4 to 6 liter respiratory bag called "false lung", connected to the respiratory tract via a filter cartridge containing the KO 2 .
  • the air contained in the "false lung” is then breathed in a closed circuit (pendulum breathing).
  • the gases thus recycled are, on the subject side depleted in oxygen and enriched in CO 2 , while, after passing over the KO 2 , the CO 2 is fixed by a reaction which produces oxygen to replace that consumed by the subject.
  • the temperature of the inspired gases is thus reduced at 50-60 ° C, temperature still high enough to require the exclusive use of a mouthpiece, which avoids contact of the gases around the outer periphery of the mouth.
  • known devices are equipped with a device for producing a few liters of oxygen for initially fill in the "false lung".
  • the publication EP 0 182 581 describes an apparatus pendulum type closed circuit breathing system which includes a respiratory bag constituting a false lung in gas communication with a facial means to be applied to the subject for which the device is intended so that the gases expired by the subject are sent to the false lung and that the inspired gases come from the false lung, this device comprising a filter cartridge capable of eliminating the gas carbon dioxide from exhaled gases and comprising a trap capable of absorb heat from gases from the cartridge filter, the trap and the cartridge being placed in this order in the expired gas path and in order reverse on the path of the inspired gases.
  • the present invention relates to an apparatus realizing a simple pendulum circuit compatible with the use of a mask, freed from the above drawbacks.
  • an apparatus pendulum type respiratory system operating in closed circuit, comprising a respiratory bag constituting a false lung in gas communication with a room facial to apply to the subject for which the device is intended so that the gases exhaled by the subject are sent to the false lung and that the gases inspired by the subject come from the false lung, this device comprising a filter cartridge capable of removing carbon dioxide from exhaled gases and comprising a trap capable of absorbing heat in the gases coming from the filter cartridge, the trap and the cartridge being placed in this order on the path of the exhaled gases and in reverse order on the path of inspired gases, characterized in that said filter cartridge contains a substance suitable for converting carbon dioxide from exhaled gases to oxygen, in that said trap is a thermal sponge suitable for absorb the heat of gases by capacitive effect from the filter cartridge and able to cool in contact with the exhaled gases passing through it, in that the false lung is provided with an admission means for admitting outside air into the false lung when the pressure in the false lung is less than the pressure and in that the
  • thermal sponge cannot work this way that in pendulum regime, the term sponge meaning well that any amount of heat drawn assumes that the previous was evacuated.
  • the thermal trap described in prior art can be arranged in a circuit not pendulum (fig. 2), it clearly appears that it cannot be a thermal sponge.
  • the device works as follows:
  • the "false lung” (5) is naturally empty of air and the first inspiration tries to collab the bag (5), which opens the valve (6) and lets in a volume of air ambient corresponding to the volume of inspiration.
  • This filter is therefore relatively discreet and can advantageously be consisting of a layer of 4 to 6 millimeters of foam synthetic, porous, impregnated with activated carbon.
  • the exhaled gases are depleted in O 2 and enriched in CO 2 .
  • the CO 2 reacts with the KO 2 to produce oxygen to replace that consumed by the subject.
  • the very exothermic reaction heats the KO 2 , which rises to a temperature of almost 150 ° C.
  • the inspired gases exit the KO 2 cartridge at almost 100 ° C, but transfer this heat into the thermal sponge (3), which rises only a few degrees above its temperature. medium, limited to 40-45 ° C. In fact, if the sponge heats up during inspiration, the gases exhaled at 37 ° C cool it during expiration.
  • the oxygen supplied by the reaction on the KO 2 is in reality slightly greater than that consumed by the subject.
  • the invention does not, however, exclude the possibility insert an exhaust valve, which can be possibly a mechanical means of reopening the valve (6), if the "false lung" takes up a volume exceeding a given value.
  • the invention is not limited to this example of production.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Claims (6)

  1. Atmungsgerät vom pendelnden Typ, das mit geschlossenem Kreislauf arbeitet, mit einem Atmungssack, der eine Scheinlunge (5) in Gasverbindung mit einem Gesichtsteil (1) bildet, das an eine Person anzulegen ist, für die das Gerät bestimmt ist, derart, dass die von der Person ausgeatmeten Gase zur Scheinlunge befördert werden und die von der Person eingeatmeten Gase von der Scheinlunge kommen, welches Gerät eine Filterkartusche (4), die das Kohlendioxid aus den ausgeatmeten Gasen entfernen kann, und eine Falle (3) umfasst, die die Wärme in den Gasen absorbieren kann, die von der Filterkartusche kommen, welche Falle und welche Kartusche in dieser Reihenfolge im Weg der ausgeatmeten Gase und in der umgekehrten Reihenfolge im Weg der eingeatmeten Gase angeordnet sind, dadurch gekennzeichnet dass die Filterkartusche einen Stoff enthält, der das Kohlendioxid der ausgeatmeten Gase in Sauerstoff umwandeln kann, und dass die Falle ein Wärmeschwamm ist, der über einen kapazitiven Effekt die Wärme der Gase absorbieren kann, die von der Filterkartusche kommen, und der sich in Kontakt mit den hindurch strömenden, ausgeatmeten Gasen abkühlen kann, die Scheinlunge (5) mit Zutrittseinrichtungen (6) versehen ist, damit Aussenluft in die Scheinlunge eintreten kann, wenn der Druck in der Scheinlunge unter dem Aussendruck liegt, und das Gerät ein Aktivkohlefilter (2) umfasst, welches Filter (2), welcher Wärmeschwamm (3) und welche Filterkartusche (4) in dieser Reihenfolge im Weg der ausgeatmeten Gase und in der umgekehrten Reihenfolge im Weg der eingeatmeten Gase angeordnet sind.
  2. Gerät nach Anspruch 1 bei dem der Stoff Kaliumsuperoxid ist oder umfasst.
  3. Gerät nach einem der Ansprüche 1 oder 2, bei dem das Aktivkohlefilter (2) aus einer 4 bis 6 mm starken Schicht eines porösen kohlenstoffhaltigen Schaumes besteht.
  4. Gerät nach einem der Ansprüche 1 bis 3, bei dem der Wärmeschwamm (3) aus kompakter Metallspäne besteht, die eine poröse 10 bis 20 mm starke Schicht bildet.
  5. Gerät nach einem der Ansprüche 1 bis 4, bei dem die Luftzutrittseinrichtungen (6) aus einer Klappe bestehen, die normalerweise geschlossen ist und sich zum Inneren der Scheinlunge öffnet, wenn der Druck in der Scheinlunge unter dem Aussendruck liegt.
  6. Gerät nach einem der vohergehenden Ansprüche, bei dem das Gesichtsteil (1) eine Halbmaske ist.
EP19970401679 1996-07-11 1997-07-11 Atemschutzgerät mit geschlossenem Kreislauf Expired - Lifetime EP0818217B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9608671 1996-07-11
FR9608671A FR2750869B1 (fr) 1996-07-11 1996-07-11 Appareil respiratoire a fonctionnement en circuit ferme

Publications (2)

Publication Number Publication Date
EP0818217A1 EP0818217A1 (de) 1998-01-14
EP0818217B1 true EP0818217B1 (de) 2001-11-28

Family

ID=9493946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970401679 Expired - Lifetime EP0818217B1 (de) 1996-07-11 1997-07-11 Atemschutzgerät mit geschlossenem Kreislauf

Country Status (4)

Country Link
EP (1) EP0818217B1 (de)
DE (1) DE69708527D1 (de)
ES (1) ES2165571T3 (de)
FR (1) FR2750869B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10304216B3 (de) * 2003-01-30 2004-10-14 Msa Auer Gmbh Atemschutzfilter und Verfahren zu dessen Herstellung
CN107510903A (zh) * 2017-08-31 2017-12-26 冯婷婷 一种具有氧气缓释功能的口罩内芯
EP3957369A1 (de) * 2020-08-20 2022-02-23 Olero IP AB Atemmaske mit filter
EP4228726B1 (de) 2020-10-15 2025-01-08 Ambu A/S Wiederbelebungsgerät

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1051054A (de) * 1900-01-01
GB8428689D0 (en) * 1984-11-13 1984-12-19 Life Support Eng Ltd Closed circuit breathing apparatus
DE3442882A1 (de) * 1984-11-24 1986-05-28 Drägerwerk AG, 2400 Lübeck Atemschutzgeraet mit regeneration der atemluft
EP0356000A3 (de) * 1988-08-26 1992-05-20 The British Petroleum Company p.l.c. Atemgerät
GB8916449D0 (en) * 1989-07-19 1989-09-06 Sabre Safety Ltd Emergency escape breathing apparatus

Also Published As

Publication number Publication date
DE69708527D1 (de) 2002-01-10
EP0818217A1 (de) 1998-01-14
FR2750869A1 (fr) 1998-01-16
ES2165571T3 (es) 2002-03-16
FR2750869B1 (fr) 1998-11-06

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