EP0378664A1 - Appareil respiratoire autonome de secours. - Google Patents
Appareil respiratoire autonome de secours.Info
- Publication number
- EP0378664A1 EP0378664A1 EP89908218A EP89908218A EP0378664A1 EP 0378664 A1 EP0378664 A1 EP 0378664A1 EP 89908218 A EP89908218 A EP 89908218A EP 89908218 A EP89908218 A EP 89908218A EP 0378664 A1 EP0378664 A1 EP 0378664A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hood
- air
- bottle
- nozzle
- pressure
- 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
Links
- 230000000241 respiratory effect Effects 0.000 title description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 15
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 14
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 14
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 206010003497 Asphyxia Diseases 0.000 claims description 4
- 239000004642 Polyimide Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 28
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 8
- 230000002745 absorbent Effects 0.000 description 7
- 239000002250 absorbent Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 4
- 231100000331 toxic Toxicity 0.000 description 4
- 230000002588 toxic effect Effects 0.000 description 4
- 239000012080 ambient air Substances 0.000 description 2
- 230000034994 death Effects 0.000 description 2
- 231100000517 death Toxicity 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- XXQBEVHPUKOQEO-UHFFFAOYSA-N potassium peroxide Inorganic materials [K+].[K+].[O-][O-] XXQBEVHPUKOQEO-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- OLBVUFHMDRJKTK-UHFFFAOYSA-N [N].[O] Chemical compound [N].[O] OLBVUFHMDRJKTK-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 210000000941 bile Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 231100000566 intoxication Toxicity 0.000 description 1
- 230000035987 intoxication Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- CLSKHAYBTFRDOV-UHFFFAOYSA-N potassium;molecular oxygen Chemical compound [K+].O=O CLSKHAYBTFRDOV-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
- A62B17/04—Hoods
Definitions
- the invention relates to an autonomous emergency breathing apparatus, intended to be stored for an extended period of time and to be used for a short period of time, to allow the wearer of the apparatus to move away from an area with high risk of suffocation.
- the apparatuses which one currently finds on the trade include a mask or a hood intended to wrap the head of a person, and more or less sophisticated filters, intended to absorb the toxic components of the ambient air, before their in ⁇ halation by the person wearing the device.
- Devices of this type can be stored for a relatively long period of time and have a relatively high reliability, due to the absence of moving parts. They are simple to use, since it suffices to place them on the head and to tighten them around the neck to prevent them from filling up with smoke or toxic components.
- the subject of the invention is an autonomous emergency breathing apparatus which has high reliability, so that it can be stored for a period of several years and remain usable without loss of performance, and which is also inexpensive and of convenient use. and simple by unskilled people.
- a respiratory device of the aforementioned type comprising a mask or a hood intended to cover widely, but substantially tightly, the wearer's head, oxygen supply means and carbon dioxide absorption means, ca ⁇ characterized in that the oxygen supply means comprise a bottle having a volume of the order of a hundred cm ⁇ , filled under an initial pressure of the order of 200 bars of a breathable gas containing oxygen, means for expanding the gas to a pressure several times greater than the ambient pressure, and an ejection nozzle connected by the expansion means to the bottle and opening into an air passage duct, for suction of the air contained in the hood and mixing of this air with the gas leaving the nozzle, the flow rate of the bottle being of the order of 2 to 4 liters per minute, the nozzle associated with the air passage duct having a drive ratio of the order of 10 to 20.
- the oxygen supply means comprise a bottle having a volume of the order of a hundred cm ⁇ , filled under an initial pressure of the order of 200 bars of a breathable gas containing oxygen, means for expanding the
- the device according to the invention is of the auto ⁇ nomous type operating in a closed circuit, which avoids all the drawbacks of the prior known devices of the type with filtration of outside air.
- the device according to the invention has a high reliability (absence of mo ⁇ bile part) and is independent of any external energy source, the speed of the gas leaving the ejection nozzle being sufficient to ensure , by entrainment, a suitable circulation of the air contained in the hood, the elimination of carbon dioxide (and also possibly water vapor) which it contains by passage over absorbent materials, and its mixture with the gas coming out of the bottle.
- the weight and the low volume of the bottle also constitute an essential advantage of the invention: a bottle with a volume of the order of 100 cm '' filled with a breathable gas containing 60 to 70% oxygen, is sufficient to ensure an autonomy of 5 to 10 minutes approximately, while maintaining the concentration of carbon dioxide in the mask at a value below
- REPLACEMENT SHEET a threshold of around 5%, beyond which there are risks of intoxication or discomfort.
- the above-mentioned ejection nozzle has an outlet diameter of approximately 0.35 mm.
- the middle part of the air passage duct is formed by a mixer with a substantially constant section, and has a diameter of approximately 3.5 mm and a length of approximately 25 mm.
- This conduit is formed by a diffuser so that the pressure of the gases leaving the conduit is slightly greater than ambient pressure, this diffuser comprising a frustoconical part having an apex angle of about 3 * and ending in a flared end having a diameter of about 11 mm.
- the ejection nozzle is supplied with respi ⁇ able gas at a pressure of between 4 and 10 bars approximately.
- All the aforementioned means namely the bottle, the expansion means, the means for absorbing carbon dioxide and possibly water vapor, the ejection nozzle and the air passage duct are contained in the inside the hood.
- the latter is advantageously made of a light and transparent plastic material, heat resistant, such as a polyimide.
- part of the outer surface of the hood can be metallized.
- FIG. 1 is a schematic perspective view of an apparatus according to the invention, under conditions of use,
- COMPLETION SHEET Figure 2 is a schematic view in axial section of an embodiment of the essential part of the apparatus according to the invention.
- Figure 3 is an axial sectional view, on a larger scale, of a nozzle-duct assembly of air passage according to a preferred embodiment of the invention.
- the apparatus shown in FIG. 1 comprises a mask or a hood 10 of substantially cylindrical tubular shape, closed at its upper end and open at its lower end so that it can be threaded onto the head of a person.
- the lower end of the hood 12 comprises tightening means around the neck of the person, to prevent the entry of air or external gas into this hood.
- the dimensions of the cauldron are such that, when it is inflated, its internal volume is much greater than that of a person's head.
- This hood is preferably made of a light, flexible, waterproof or waterproof plastic material, transparent, resistant to heat and fire and, if possible, inexpensive.
- a polyimide sold under the brand KAPTON is used.
- a large part 14 of the outer surface of the hood can receive a protective metallic coating, while the remaining part 16, at height of the person's eyes, remains transparent.
- an assembly 18 for supplying oxygen and for circulating and purifying the air contained in the hood.
- this en ⁇ seems 18 includes a bottle 20 of small volume, made for example of metal such as steel or aluminum or composite material, and containing a breathable gas under a very high pressure of around 200 bars. Breathing gas can be
- Expansion means 22 which may be of a conventional type, are mounted at the outlet of the bottle 20 to supply an ejection nozzle 24 with a relatively constant flow of gas at a pressure which is several times greater at normal ambient pressure, which is for example between 4 and 10 bars approximately.
- the nozzle 24 is located immediately upstream of the neck 26 of an air passage duct 30, the upstream end 32 of which, with the nozzle 24, defines an air suction channel through a bed 34 of a material porous or powdery such as potassium dioxide KO2, lithium hydroxide LiOH, or preferably lime, which is easy to handle, non-toxic and less expensive than lithium hydroxide.
- a material porous or powdery such as potassium dioxide KO2, lithium hydroxide LiOH, or preferably lime, which is easy to handle, non-toxic and less expensive than lithium hydroxide.
- silica gel it is possible to add silica gel to this material, for the absorption of water vapor.
- the absorbent material or materials are arranged in a tubular cylindrical envelope 40 which surrounds the bottle 20 and the conduit 30, so as to reduce the total bulk of the system.
- the envelope 40 is for example triple-walled and delimits two co-axial chambers in which are placed two tubular cylindrical containers 44, 46 filled with absorbent material (s).
- the perforated ends of these containers allow air circulation through the absorbent material, along a baffled path inside the envelope 40.
- the latter is formed with or is mounted on a cylinder 48 also supporting the conduit 30 and having one end closed by the bottle 20, so that the upstream end 32 of the conduit 30 communicates with the outside via the passage containing the absorbent material (s).
- the nose of the bottle 20 is for example screwed into a threaded end of the regulator 22 which forms with the ejection nozzle 24 an assembly kept centered inside the cylinder 48.
- the front part of the regulator 22 is for example carried by radial lugs 42 integral with the cylinder 48 or the upstream end 32 of the conduit 30, for proper centering of the nozzle 24 relative to the port 30.
- the conduit 30 comprises a mixer 26 of substantially constant sec ⁇ tion, and having a certain length, which is connected to a diffuser 36 such that the gas pressure at the outlet of the conduit 30 is very slightly greater than the pressure at inside the ghoul. A slight overpressure is thus produced inside the hood, which makes it possible to inflate it and prevent the entry of outside air, and a greater flow of air sucked into the duct 30 is also obtained. .
- the absorption of carbon dioxide by the material 34 is an exothermic reaction, which results in heating of the purified air.
- the cooling which accompanies any expansion of a pressurized gas is advantageously used to reduce the temperature of the purified air, thanks to the arrangement of the bottle 20, the regulator 22 and the nozzle 24 at the inlet of the. conduit 30 on the path of the aspirated air.
- the nozzle 24-conduit assembly 30, a preferred embodiment of which has been shown in FIG. 3, must have characteristics making it possible to ensure sufficient circulation of the air contained in the hood for the elimination of carbon dioxide.
- the nozzle 24 has an upstream diameter of the order of 2 mm, and a downstream diameter, at its outlet end, of 0.35 mm.
- the upstream end 32 of the conduit 30 is connected to the mixer 26 by a convex surface having a radius of curvature of approximately 4 mm.
- the mixer 26 has a diameter of about 3.5 mm and a length of about 25 mm, and it
- REPLACEMENT SHEET is connected to the diffuser 36 which comprises a frustoconical upstream part having an apex angle of approximately 3 * and a flared downstream part, formed by a convex surface having a radius of curvature of the order of 6 mm.
- the downstream end of the diffuser 36 can have a diameter of approximately 11 mm.
- the nozzle 24-conduit assembly 30 has a length of the order of approximately 50 mm, the distance between the nozzle 24 and the upstream end 32 of the conduit 30 being approximately 5 mm.
- Such an assembly has a drive power of between 10 and 20 approximately, and for example equal to 12.
- the drive ratio is the ratio of the flow of air sucked inside the hood and the flow of gas mo - content delivered by the nozzle 24.
- this flow of engine gas is chosen to be equal to approximately 3 liters / minute, which ensures the suction of an air flow of the order of approximately 36 liters / minute into the hood: this flow d air keeps a level of CO2 in the hood that does not exceed 3% when the person produces a moderate effort.
- the bottle 20 can have a volume of the order of 100 cm 3, and is filled with gas containing from 60 to 70% of oxygen, under an initial pressure of 200 bars. It then provides an autonomy of at least five minutes for the wearer of the hood. During this time, the concentration of carbon dioxide inside the hood, which is of the order of 3% initially in the case of a moderate effort, remains below 5%, which avoids risks of poisoning and discomfort for the wearer of the device.
- the necessary quantity of absorbent material 34 is of the order of approximately 300 to 400 g.
- the device according to the invention is intended, in principle, to be stored for several years before possibly to be used in an emergency. For this, it is advantageous that it is stored away from air and moisture, in a sealed package, for example formed by the hood itself, and can also be easily checked and replaced if necessary. at regular intervals. It is also necessary that the bottle 20 is closed in a sealed manner to maintain its internal pressure for a long time, and that it is equipped with rapid opening means, for example by rotation over a quarter turn. Provision may be made for the entire apparatus to include automatic triggering means by unfolding the hood and trac ⁇ ing on a strap or the like, or by rotating the bottle, etc. In an emergency, a person must therefore unfold the hood, pass it over his head and tighten it at neck level while triggering its operation, which results in swelling of the hood.
- the gas contained in the bottle 20 is expanded by the means 22 to a pressure of the order of approximately 4 to 10 bars, and reaches the ejection nozzle 24, with a substantially constant flow rate of the order of 3 liters /minute.
- the device according to the invention can be packaged in a waterproof bag provided with rapid opening means, for example of the type
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89908218T ATE102493T1 (de) | 1988-07-12 | 1989-07-10 | Selbsttragendes notatemgeraet. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8809453A FR2634130B1 (fr) | 1988-07-12 | 1988-07-12 | Appareil respiratoire autonome de secours |
FR8809453 | 1988-07-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0378664A1 true EP0378664A1 (fr) | 1990-07-25 |
EP0378664B1 EP0378664B1 (fr) | 1994-03-09 |
Family
ID=9368355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89908218A Expired - Lifetime EP0378664B1 (fr) | 1988-07-12 | 1989-07-10 | Appareil respiratoire autonome de secours |
Country Status (6)
Country | Link |
---|---|
US (1) | US5027810A (fr) |
EP (1) | EP0378664B1 (fr) |
JP (1) | JPH03502057A (fr) |
DE (1) | DE68913712D1 (fr) |
FR (1) | FR2634130B1 (fr) |
WO (1) | WO1990000421A1 (fr) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1690511B1 (fr) | 1990-10-19 | 2010-07-14 | St. Louis University | Système de détermination de la position d'une sonde chirurgicale par rapport à la tête |
US6347240B1 (en) | 1990-10-19 | 2002-02-12 | St. Louis University | System and method for use in displaying images of a body part |
NO178529C (no) * | 1991-08-27 | 1996-04-17 | Ottestad Nils T | Selvforsynt nödpusteinnretning |
WO1994024933A1 (fr) | 1993-04-26 | 1994-11-10 | St. Louis University | Indication de la position d'une sonde chirurgicale |
US5490501A (en) * | 1994-05-16 | 1996-02-13 | Crowley; Thomas J. | Avalanche victim's air-from-snow breathing device |
US5613490A (en) * | 1994-07-28 | 1997-03-25 | Mayes; Richard P. | Compact, lightweight breathable air pressure vessel |
US5529058A (en) * | 1994-09-30 | 1996-06-25 | Crippen; Warren S. | Personal self-contained air safety system |
US6978166B2 (en) | 1994-10-07 | 2005-12-20 | Saint Louis University | System for use in displaying images of a body part |
US5495847A (en) * | 1995-05-17 | 1996-03-05 | Hu; Wei | Survival hood |
US5724963A (en) * | 1995-10-27 | 1998-03-10 | Seeley; Larry E. | Portable air respirator |
US6432172B1 (en) | 1996-03-07 | 2002-08-13 | Ptrl East, Inc. | Method of treating symptoms of panic attacks |
DE19832000C1 (de) * | 1998-07-16 | 1999-11-04 | Draeger Aerospace Gmbh | Fluchthaube |
US6247471B1 (en) * | 1999-07-08 | 2001-06-19 | Essex Pb&R Corporation | Smoke hood with oxygen supply device and method of use |
US6694972B2 (en) * | 2000-10-13 | 2004-02-24 | Government Specialty Products | Gas canister protection system |
AU2003900203A0 (en) * | 2003-01-17 | 2003-01-30 | Unisearch Limited | A respiratory assist device and method of providing respiratory assistance |
US20060011201A1 (en) * | 2004-07-14 | 2006-01-19 | Tsung-Yuan Ku | Modified eye and mouth mask structure for escape from dense smoke of fire accident |
US20080223372A1 (en) * | 2004-07-14 | 2008-09-18 | Tsung-Yuan Ku | Modified eye and mouth mask structure for escape from dense smoke of fire accident |
US7712151B2 (en) * | 2004-08-27 | 2010-05-11 | Campus Housing Company LLC | Inflatable protective enclosure |
GB2466062B (en) * | 2008-12-12 | 2011-06-08 | Raymond Thornton Andrews | Portable emergency breathing apparatus |
AU2010300538A1 (en) * | 2009-09-30 | 2012-04-19 | Essex Industries, Inc. | Emergency breathing apparatus |
USD735846S1 (en) | 2012-06-13 | 2015-08-04 | Kimberly-Clark Worldwide, Inc | Integrated mask and hood |
FR3042421B1 (fr) * | 2015-10-15 | 2018-10-26 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cagoule de protection respiratoire |
US10933264B1 (en) | 2019-04-09 | 2021-03-02 | Christopher Strouse | Portable fire safety enclosure system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE277995C (fr) * | ||||
DE132021C (fr) * | 1901-04-03 | 1902-06-30 | ||
FR730522A (fr) * | 1932-01-26 | 1932-08-17 | Appareils respiratoires simplifiés pour la protection des populations civiles contre les gaz de guerre | |
US2366904A (en) * | 1942-05-16 | 1945-01-09 | Haugh S Products Ltd | Oxygen tent |
GB577435A (en) * | 1944-02-23 | 1946-05-17 | Siebe Gorman & Co Ltd | Improvements relating to self-contained breathing apparatuses |
DE1222801B (de) * | 1959-02-28 | 1966-08-11 | Medizintechnik Leipzig Veb | Sauerstoffatemschutzgeraet mit Regeneration der Ausatemluft |
US3521629A (en) * | 1967-09-18 | 1970-07-28 | Schjeldahl Co G T | Heat and smoke protective hoods |
US3976063A (en) * | 1974-09-16 | 1976-08-24 | The Bendix Corporation | Escape breathing apparatus |
US4440163A (en) * | 1982-07-30 | 1984-04-03 | Gabriel Spergel | Emergency escape breathing apparatus |
US4552140A (en) * | 1983-04-29 | 1985-11-12 | Erie Manufacturing Co. | Emergency escape device |
-
1988
- 1988-07-12 FR FR8809453A patent/FR2634130B1/fr not_active Expired - Lifetime
-
1989
- 1989-07-10 WO PCT/FR1989/000364 patent/WO1990000421A1/fr active IP Right Grant
- 1989-07-10 JP JP1507829A patent/JPH03502057A/ja active Pending
- 1989-07-10 DE DE89908218T patent/DE68913712D1/de not_active Expired - Lifetime
- 1989-07-10 US US07/490,601 patent/US5027810A/en not_active Expired - Fee Related
- 1989-07-10 EP EP89908218A patent/EP0378664B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9000421A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2634130B1 (fr) | 1991-07-05 |
EP0378664B1 (fr) | 1994-03-09 |
US5027810A (en) | 1991-07-02 |
WO1990000421A1 (fr) | 1990-01-25 |
DE68913712D1 (de) | 1994-04-14 |
FR2634130A1 (fr) | 1990-01-19 |
JPH03502057A (ja) | 1991-05-16 |
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