EP0515870B1 - Cartouche filtrante comportant un sac élastique pour recevoir le chargement - Google Patents

Cartouche filtrante comportant un sac élastique pour recevoir le chargement Download PDF

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Publication number
EP0515870B1
EP0515870B1 EP92107539A EP92107539A EP0515870B1 EP 0515870 B1 EP0515870 B1 EP 0515870B1 EP 92107539 A EP92107539 A EP 92107539A EP 92107539 A EP92107539 A EP 92107539A EP 0515870 B1 EP0515870 B1 EP 0515870B1
Authority
EP
European Patent Office
Prior art keywords
filling
pressure
foil bag
air purification
connection piece
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
EP92107539A
Other languages
German (de)
English (en)
Other versions
EP0515870A1 (fr
Inventor
Werner Jumpertz
Werner Sartor
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.)
Draegerwerk AG and Co KGaA
Original Assignee
Draegerwerk AG and Co KGaA
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 Draegerwerk AG and Co KGaA filed Critical Draegerwerk AG and Co KGaA
Publication of EP0515870A1 publication Critical patent/EP0515870A1/fr
Application granted granted Critical
Publication of EP0515870B1 publication Critical patent/EP0515870B1/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
    • A62B19/00—Cartridges with absorbing substances for respiratory apparatus

Definitions

  • the invention relates to an air cleaning cartridge and device for filling the same with a filling of a granular chemical for processing breathing air in a housing, the side walls of which are at least partially made of an elastic, elastic material, and each with a breathing connection for introducing breathing gas and for discharging it of processed breathing gas.
  • a cylindrical outer wall is provided between the two breathing connections, which consists of an elastically resilient material, for example rubber.
  • the filling of the cartridge with a granular chemical which absorbs, for example, the CO2 of the exhaled air in a respirator in order to feed the processed breathing gas back to the device wearer, takes place with the container open to the atmosphere. Due to the gravity of the filling, the elastic wall part of the air-cleaning cartridge is stretched as the degree of filling progresses, so that when the cartridge is completely filled, the granular filling bodies are under a contraction force of the stretched wall part. Due to this contraction force, the granular fillings are held together and packed in a firm bond.
  • the elasticity of the elastic housing wall under the internal pressure of the filling is not sufficient to keep the filling, which can weigh up to a few kilograms, under a compressive pressure even during a long storage period, so that the granular filling bodies remain tightly packed , even during a possible transport.
  • the choice of suitable materials was limited to those that could either accommodate the heavy filling but were therefore not stretchable enough to exert sufficient contraction pressure, or were stretchable to the extent that an initial contraction pressure after filling was carried out on the granular ones Filling bodies could be exercised, but after a long period of storage the elasticity decreased to such an extent that the force of contraction also decreased to a disappearing level.
  • the known stretchable air cleaning cartridge is not very suitable for accommodating particularly large fillings which are required with the increasingly prolonged service life of the respiratory protective devices which accommodate these air cleaning cartridges.
  • the known air cleaning cartridge expands more or less, which also results in the resulting air cleaning cartridge Contraction force takes different values. If the contraction force of the known filled air cleaning cartridge were to be increased even further, mechanical pressure would have to be exerted on the full filling in order to expand the wall of the cartridge even further. Such a mechanical application of pressure would, however, result in the packing bodies breaking and thereby changing the packing density required for operation. The break on the chemical grains creates dust that settles in the spaces between the grains and increases the flow resistance.
  • the present invention is therefore based on the object of improving an air cleaning cartridge and a device for filling the same in such a way that the expansion of the housing can be expanded in a controlled manner before the chemical is filled in, in order to achieve a reproducible contraction force of the filled housing, and in order to ensure that it is ready for use Extend cartridge storage time.
  • a pressure port can be connected to one of the connections, through which a compressed gas can be introduced into the housing, which is designed as an isometrically expandable, elastic film bag that can be expanded by a multiple of its original volume, and that the granular chemical can be introduced into the inflated, pressurized foil bag via a filler neck.
  • the advantage of the invention lies essentially in the fact that the housing designed as a film bag can now be inflated to a predetermined volume in order to be able to exert a load on the subsequent filling in accordance with the expansion force of the inflated film bag Contraction force to be determined in advance.
  • the granular packing material is compressed with reproducible compression and the filling remains tightly packed and tightly packed even during a long storage period and during transport.
  • the filling process is facilitated in that the film bag is expanded to its final state in advance by introducing enough compressed air into it until it reaches the desired extent.
  • the packing elements can then be introduced into this expanded film bag via the filling nozzle.
  • the filler neck must be sealed pressure-tight with respect to the inflated foil bag, but on the other hand it must also allow the chemical to be filled.
  • one of the connections is provided with the pressure port, and the other connection is connected to the filling chamber in which the chemical to be filled is in a suitable amount.
  • the filling chamber can be closed at the level of the connection with a slide.
  • the chemical is poured from the filling chamber into the expanded film bag, whereupon the pressure is released and the expanded film bag tries to contract, which prevents it from being completely filled.
  • the pressure port and filling chamber can now be removed from the connections, and the air cleaning cartridge can be used.
  • the pressure port directly to the filling chamber.
  • This forms a coherent filling unit which can be placed pressure-tight on one of the connections of the cartridge, the other connection being sealed.
  • the compressed gas is passed through the pressure nozzle both into the filling chamber filled with the chemical and into the foil bag, whereupon this expands to a resulting volume in accordance with its extensibility and the filling pressure of the compressed gas, whereupon the filling from the filling chamber into the expanded foil bag can be emptied.
  • the pressure of the compressed gas is then relieved, so that the film bag contracts around the filling.
  • the film bag is expanded to such an extent that more filling material fits into it than is provided in the filling chamber, a possibility should be provided for repeatedly filling the film bag from the filling chamber.
  • a film bag made of an elastomer with a thickness of approximately 0.25 mm is suitable for expanding in welded form from a starting volume of 800 cm3 to a volume of approximately 2500 cm3 due to a slight excess pressure of approximately 150 mbar.
  • an elastomer, eg polyurethane, welded in a film to form a film bag has the sufficient Elasticity in order to obtain a desired volume, but on the other hand also sufficient rigidity so that the contraction force exerted on the filling does not decrease in the long term under the back pressure of the filling. In this way, expansions of the film bag to five times the original volume can be achieved.
  • the single figure shows a housing of an air cleaning cartridge designed as a film bag (1), which is connected with its connections (2) on the one hand to a filling chamber (3) and on the other hand is closed to the environment via a pressure-tight plug (4).
  • the filling chamber (3) is filled with a granular chemical (5) as a filling and sealed off from the environment by a cover (6).
  • the cover (6) has a pressure nozzle (7) which is connected to a pressure gas source (not shown) via a pressure line (8) which is only partially shown.
  • the pressure nozzle (7) and the connections (2) are tightly connected on the one hand to the pressure line (8) and on the other hand to the foil bag (1) via clamps (9).
  • the filling connection (10) of the filling chamber (3) is closed pressure-tight towards the foil bag (1) by means of a slide (11) which can be moved into the open position in a slide guide (12).
  • Compressed gas of approximately 150 mbar pressure coming from the pressure line (8) from the pressure line (7) is passed into the initially empty filling chamber (3), the opened slide (11) into the foil bag (1 '), which is shown in dashed lines relaxed shape up to the blown film bag (1) shown in solid lines. Then the slide (11) is closed so that the foil bag (1) remains in its inflated form and the filling chamber (3) can be opened via the screw-on cover (6) and filled with the granular chemical (5). After closing the filling chamber (3) and restoring the pressure connection to the compressed gas source via the pressure nozzle (7) and pressure line (8), the slide (11) is opened and the contents of the filling chamber (3) trickle into the film bag (1).
  • the pressure from the filling chamber (3) and the film bag (1) can be released to the environment, so that the film bag (1) tries to contract to its original shape (1 ') and firmly compresses the filling (5) it encloses.
  • Another filling option is to connect the filling chamber filled with the chemical (5) when the slide (11) is closed but retains the chemical (5) but allows the compressed gas to pass through to the compressed gas source (not shown) via the pressure line (8) and the pressure port (7) and inflating the foil bag (1 ') from its original shape onto the inflated shape (1) shown.
  • the filling (5) of the filling chamber (3) trickles into the stretched film bag (1).
  • both the filling chamber (3) and the film bag (1) remain under the excess pressure of the compressed gas supplied by the pressure line (8).
  • the film bag (1) is provided with a sealing film (15) on its surface to seal it off from the water vapor.

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)
  • Basic Packing Technique (AREA)
  • Buffer Packaging (AREA)

Claims (6)

  1. Cartouche d'épuration de l'air et dispositif de remplissage de celle-ci avec une charge de produit chimique (5) en granulés pour la préparation d'air respiratoire dans un boîtier, dont les parois latérales sont réalisées, au moins partiellement, en un matériau élastique extensible, et qui est pourvu, respectivement, d'un raccord respiratoire (2) pour l'introduction de gaz respiratoire et pour l'évacuation de gaz respiratoire préparé, caractérisée en ce qu'un manchon soumis à la pression (7) est susceptible d'être raccordé au niveau de l'un des raccords (2), manchon par lequel un gaz sous pression est susceptible d'être introduit dans le boîtier, qui est conformé en sac souple (1, 1') élastique, extensible de façon isométrique, pouvant s'élargir selon un multiple de son volume initial, et en ce que le produit chimique en granulés peut être introduit dans le sac souple (1) gonflé, mis en surpression, par l'intermédiaire d'un manchon de remplissage (13).
  2. Cartouche d'épuration de l'air et dispositif de remplissage de celle-ci selon la revendication 1, caractérisée en ce que le manchon de remplissage (13) est reliée à une chambre de remplissage (3) contenant le produit chimique, susceptible d'être raccordée de façon étanche à l'un des raccords (2).
  3. Cartouche d'épuration de l'air et dispositif de remplissage de celle-ci selon la revendication 2, caractérisée en ce que le manchon soumis à la pression (7) est prévu sur la chambre de remplissage (3).
  4. Cartouche d'épuration de l'air et dispositif de remplissage de celle-ci selon la revendication 3, caractérisée en ce que le manchon de remplissage (13) est pourvue d'une vanne de fermeture (11) étanche.
  5. Cartouche d'épuration de l'air et dispositif de remplissage de celle-ci selon l'une des revendications 1 à 3, caractérisée en ce que le sac souple (1, 1') est fabriqué dans un élastomère d'une épaisseur d'environ 0,25 mm.
  6. Cartouche d'épuration de l'air et dispositif de remplissage de celle-ci selon l'une des revendications 1 à 5, caractérisée en ce que le sac souple (1, 1') est entouré d'une pellicule isolante (15) ne laissant pas passer la vapeur d'eau.
EP92107539A 1991-05-25 1992-05-05 Cartouche filtrante comportant un sac élastique pour recevoir le chargement Expired - Lifetime EP0515870B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117168A DE4117168C2 (de) 1991-05-25 1991-05-25 Luftreinigungspatrone mit einem dehnbaren Folienbeutel für die Füllung
DE4117168 1991-05-25

Publications (2)

Publication Number Publication Date
EP0515870A1 EP0515870A1 (fr) 1992-12-02
EP0515870B1 true EP0515870B1 (fr) 1996-04-17

Family

ID=6432455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92107539A Expired - Lifetime EP0515870B1 (fr) 1991-05-25 1992-05-05 Cartouche filtrante comportant un sac élastique pour recevoir le chargement

Country Status (4)

Country Link
US (1) US5243969A (fr)
EP (1) EP0515870B1 (fr)
JP (1) JP2540414B2 (fr)
DE (2) DE4117168C2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5469863A (en) * 1993-08-11 1995-11-28 Polygenex International, Inc. Polyurethane condom of welded polyurethane film
DE10119651A1 (de) * 2001-04-20 2002-10-31 Techap Gmbh Filtervorrichtung für Chemikaliendämpfe

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD85931A (fr) *
DE1096759B (de) * 1959-08-21 1961-01-05 Medizintechnik Leipzig Veb Luftreinigungspatrone zum Auffrischen der Atemluft
DE1137957B (de) * 1960-08-03 1962-10-11 Auergesellschaft Gmbh Verfahren zum Fuellen von wiederfuellbaren Luftreinigungspatronen und Luftreinigungspatrone zum Ausfuehren des Verfahrens
US3240567A (en) * 1962-04-02 1966-03-15 Foregger Co Inc Prepackaging of granular material and methods
US3340671A (en) * 1964-08-10 1967-09-12 Carnation Co Method of filling containers under aseptic conditions
DE1708112A1 (de) * 1968-01-11 1971-04-22 Medizintechnik Leipzig Veb Atemschutzfilter mit koerniger Filtermasse
US3646726A (en) * 1970-03-31 1972-03-07 Reynolds Metals Co Method of obtaining dry, uncontaminated seals on flexible pouches
US3982573A (en) * 1974-06-12 1976-09-28 Rubber Dynamics Corporation Elastic storage tank and method for making the same
US3978901A (en) * 1975-06-20 1976-09-07 Jones Walter C Elastic storage tank
CH607933A5 (en) * 1976-07-22 1978-12-15 Schweizer Ag E Filter, especially for air raid shelters
US4632244A (en) * 1986-02-19 1986-12-30 Boris Landau Multiple chamber flexible container
US4924919A (en) * 1988-11-03 1990-05-15 Balloon Wrap, Inc. Method of filling a balloon with articles and air
US4974393A (en) * 1989-03-21 1990-12-04 Maxim Marketing, Inc. Apparatus and method for inserting objects into balloons

Also Published As

Publication number Publication date
JPH05154214A (ja) 1993-06-22
DE4117168A1 (de) 1992-11-26
DE59205993D1 (de) 1996-05-23
US5243969A (en) 1993-09-14
DE4117168C2 (de) 1993-10-07
JP2540414B2 (ja) 1996-10-02
EP0515870A1 (fr) 1992-12-02

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