EP0464234A1 - Breathing air supply apparatus - Google Patents

Breathing air supply apparatus Download PDF

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Publication number
EP0464234A1
EP0464234A1 EP90112554A EP90112554A EP0464234A1 EP 0464234 A1 EP0464234 A1 EP 0464234A1 EP 90112554 A EP90112554 A EP 90112554A EP 90112554 A EP90112554 A EP 90112554A EP 0464234 A1 EP0464234 A1 EP 0464234A1
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EP
European Patent Office
Prior art keywords
channel
air
breathing air
breathing
opening
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Granted
Application number
EP90112554A
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German (de)
French (fr)
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EP0464234B1 (en
Inventor
Niklaus Keel
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Forschungszentrum Karlsruhe GmbH
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Kernforschungszentrum Karlsruhe GmbH
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Priority to AT90112554T priority Critical patent/ATE114985T1/en
Priority to EP90112554A priority patent/EP0464234B1/en
Priority to DE59007943T priority patent/DE59007943D1/en
Priority to ES90112554T priority patent/ES2068285T3/en
Publication of EP0464234A1 publication Critical patent/EP0464234A1/en
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Publication of EP0464234B1 publication Critical patent/EP0464234B1/en
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    • 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
    • A62B18/006—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 with pumps for forced ventilation

Definitions

  • the present invention relates to a breathing air supply device according to. the preamble of claim 1.
  • Such a device is known from DE-PS 26 12 877.
  • the object of the present invention is now to expand the possible uses of the known device, to improve the reliability and to achieve the lowest possible pressure loss in the device.
  • the present invention now proposes, in a device of the type described at the outset, the features which are stated in character e) of claim 1. Further particularly advantageous embodiments of the present invention result from the characteristics f), g) and h) of the subclaims.
  • a person in a protective suit can now be supplied with breathing air in various ways.
  • an autonomous breathing air supply from the surroundings via filters will automatically take place via the same distribution system in the device.
  • the present invention particularly advantageously enables the respiratory air to be switched over or diverted without the use of flaps and valves, and thus achieves particularly reliable functioning while saving weight.
  • the device itself takes over the air distribution, whereby in the event of air failure from the distribution network, the fans are automatically switched on, which are driven by exchangeable and rechargeable batteries.
  • the special air flow in the device enables switching without flaps without valves and with the lowest pressure loss.
  • the present invention thus creates a simple, robust device in which the air can be supplied in two different ways and in which the air distribution of the supplied air takes place automatically.
  • the device thus combines the advantages of so-called. Mains air devices and with which are intended for an autonomous operating mode with air supply via filters from the ambient air.
  • the device 1 is shown schematically in the wearing position on the back of a person in a protective suit 2.
  • the device 1 is supplied with breathing air 4 from a breathing air network (not shown in more detail) via a hose 3 and a coupling 28 which automatically closes when uncoupled, which is guided symmetrically into the legs and arms of the suit 2 via the breathing air tubes 5 into the head space and via partial tubes 6 becomes.
  • hoses 5 and 6 can be supplied via the, in the embodiment shown two, suction openings 7, the filters 8 of which are shown unscrewed, further breathing air 9 sucked in at right angles to the back, from the surroundings being provided for the supply inside the device that are powered by the rechargeable batteries 10.
  • the breathing air tubes 5 At the upper end of the air outlet part 17 or the channel 11 are the breathing air tubes 5, into which the breathing air flows in from the channel 11. Laterally below the tubes 5, for example at line 16, the partial tubes 6 on the air outlet piece 17 are connected to the channel 11 (not shown in more detail in FIGS. 2 and 3).
  • blowers 18 in a row in the duct 11, which convey the air into the duct 11 in the direction of the arrow 19 to the air outlet part 17 or the hoses 5 and 6.
  • the motors are powered electrically by rechargeable batteries.
  • the air intake takes place via the intake openings 7, which are deflected in the interior of the intake parts 14 and 15 towards the housing part 13 and from there open into the channel 11 from the side.
  • the device now has two different breathing air supply systems.
  • the air is supplied to both of them in the channel 11 via the interior of the housing part 13 to the barrel outlet part 17.
  • the device thus has two separate sources or supply air inlets 9, 7 and 4, 27 for the breathing air outlets 5, for the separation of which from one another no special mechanical changeover switches are required, since the coupling 28 closes automatically when the hose 4 is removed or when the pressure drops Air 4, the blowers 18 are automatically switched on by the monitor 22. Thus, even in this case, the air cannot flow backwards through the hose 4, but is completely conveyed into the air outlet part 17. As a result, no contamination can be sucked through the hose 4.
  • the device thus allows the combination of two types of use, firstly autonomous working with a filter with hose independence for shorter uses and once air from a compressed air network, i.e. hose-bound for longer-term use. It is therefore possible to work with one device in a short time, or to work for several hours. Of course, optimal freedom of movement is guaranteed. If the device is mainly used with compressed air from a breathing air supply network, the autonomous part serves as a so-called. "Emergency ventilation", which can switch on automatically below a defined pressure.

Abstract

Breathing air supply apparatus for protective suits, having a base body 12 which is penetrated along its length by a channel 11. At the upper end of the channel 11 the hoses 5 and 6 which carry breathing air and/or serve for ventilation are connected. At the lower end of the channel 11 there are double breathing air inlets 7 leading away from the back at right angles to said channel, which inlets are closed off from the environment by means of filters 8. Installed in the channel 11 are blowers 18 which convey the breathing air. In addition to the inlets 7 for the blowers or ambient air 9, there is at the lower end of the channel 11 a further inlet or opening 27 for the connection of said channel to breathing air 4 from a supply system which can be connected to and disconnected from the air supply by means of the blowers 18. For feeding the air 4 from the system, an injector pipe 24, whose outlet opening 25 is located, viewed in the direction 26 of flow of the air in the channel 11, behind the intake opening 7 for the ambient air 9, projects into the channel 11. <IMAGE>

Description

Die vorliegende Erfindung betrifft ein Atemluftversorgungsgerät gem. dem Oberbegriff des Patentanspruches 1.The present invention relates to a breathing air supply device according to. the preamble of claim 1.

Ein solches Gerät ist aus der DE-PS 26 12 877 bekannt.Such a device is known from DE-PS 26 12 877.

Aufgabe der vorliegenden Erfindung ist es nun, die Einsatzmöglichkeiten des bekannten Gerätes zu erweitern, die Ausfallsicherheit zu verbessern und dabei einen möglichst geringen Druckverlust im Gerät zu erzielen.The object of the present invention is now to expand the possible uses of the known device, to improve the reliability and to achieve the lowest possible pressure loss in the device.

Zur Lösung dieser Aufgabe schlägt nun die vorliegende Erfindung bei einem Gerät der eingangs beschrieben Art die Merkmale vor, die im Kennzeichen e) des Patentanspruches 1 angeführt sind. Weitere besonders vorteilhafte Ausgestaltungen der vorliegenden Erfindung ergeben sich aus den Kennzeichen f), g) und h) der Unteransprüche.To achieve this object, the present invention now proposes, in a device of the type described at the outset, the features which are stated in character e) of claim 1. Further particularly advantageous embodiments of the present invention result from the characteristics f), g) and h) of the subclaims.

Mit einem Gerät gem. der vorliegenden Erfindung kann nun eine Person in einem Schutzanzug auf verschiedene Art mit Atemluft versorgt werden. Sobald die Atemluftzufuhr aus einem Atemluftversorgungsnetz abgekoppelt wird oder diese aus einem anderen Grund ausfällt, wird automatisch über das gleiche Verteilsystem im Gerät eine autonome Atemluftversorgung aus der Umgebung über Filter erfolgen. Die vorliegende Erfindung ermöglicht besonders vorteilhafterweise das Umschalten bzw. Umleiten der Atemluft ohne Verwendung von Klappen und Ventilen und bewerkstelligt damit ein besonders sicheres Funktionieren bei Gewichtsersparnis. Das Gerät übernimmt selbst die Luftverteilung, wobei bei Ausfall der Luft aus dem Verteilungsnetz automatisch die Gebläse eingeschaltet werden, welche von auswechselbaren, und aufladbaren Akkus angetrieben werden. Die spezielle Luftführung im Gerät ermöglicht dabei das Umschalten ohne Klappen ohne Ventile bei geringstem Druckverlust.With a device acc. According to the present invention, a person in a protective suit can now be supplied with breathing air in various ways. As soon as the breathing air supply is disconnected from a breathing air supply network or if it fails for another reason, an autonomous breathing air supply from the surroundings via filters will automatically take place via the same distribution system in the device. The present invention particularly advantageously enables the respiratory air to be switched over or diverted without the use of flaps and valves, and thus achieves particularly reliable functioning while saving weight. The device itself takes over the air distribution, whereby in the event of air failure from the distribution network, the fans are automatically switched on, which are driven by exchangeable and rechargeable batteries. The special air flow in the device enables switching without flaps without valves and with the lowest pressure loss.

Mit der vorliegenden Erfindung wird somit ein einfaches, robustes Gerät geschaffen, bei welchem die Luftzufuhr auf zwei verschiedene Arten erfolgen kann und welchem die Luftverteilung der zugeführten Luft automatisch erfolgt.The present invention thus creates a simple, robust device in which the air can be supplied in two different ways and in which the air distribution of the supplied air takes place automatically.

Das Gerät vereinigt somit die Vorteile sogen. Netzluftgeräte und mit denen die für eine autonome Betriebsart mit Luftzufuhr über Filter aus der Umgebungsluft vorgesehen sind.The device thus combines the advantages of so-called. Mains air devices and with which are intended for an autonomous operating mode with air supply via filters from the ambient air.

Ein Ausführungsbeispiel der vorliegenden Erfindung wird im folgenden anhand der Figuren 1 bis 3 näher erläutert:

  • Die Figur 1 zeigt das Atemluftversorgungsgerät in perspektivischer Schrägdarstellung;
  • die Figur 2 eine Draufsicht auf das Gerät von hinten mit abgenommenen Filtern und
  • die Figur 3 einen Längsschnitt entlang der Linie AB der Figur 1.
An exemplary embodiment of the present invention is explained in more detail below with reference to FIGS. 1 to 3:
  • Figure 1 shows the breathing air supply device in a perspective oblique view;
  • 2 shows a top view of the device from behind with the filters removed and
  • FIG. 3 shows a longitudinal section along line AB of FIG. 1.

In der Figur 1 ist das Gerät 1 ein schematisch in der Trageposition auf dem Rücken einer in einem Schutzanzug 2 befindlichen Person dargestellt. Das Gerät 1 wird über einen Schlauch 3 und eine beim Entkuppeln automatisch schließende Kupplung 28 mit Atemluft 4 aus einem nicht näher dargestellten Atemluftnetz versorgt, die über die Atemluftschläuche 5 in den Kopfraum und über Teilschläuche 6 jeweils symmetrisch in die Beine und Arme des Anzuges 2 geleitet wird. Diesen Schläuchen 5 und 6 kann über die, bei der dargestellten Ausführungsform zwei, Ansaugöffnungen 7, deren Filter 8 abgeschraubt dargestellt sind, weitere rechtwinklig zum Rücken angesaugte Atemluft 9 aus der Umgebung zugeführt werden, wobei für die Zufuhr im inneren des Gerätes befindliche Gebläse vorhanden sind, die von den wiederaufladbaren Batterien 10 gespeist werden.In Figure 1, the device 1 is shown schematically in the wearing position on the back of a person in a protective suit 2. The device 1 is supplied with breathing air 4 from a breathing air network (not shown in more detail) via a hose 3 and a coupling 28 which automatically closes when uncoupled, which is guided symmetrically into the legs and arms of the suit 2 via the breathing air tubes 5 into the head space and via partial tubes 6 becomes. These hoses 5 and 6 can be supplied via the, in the embodiment shown two, suction openings 7, the filters 8 of which are shown unscrewed, further breathing air 9 sucked in at right angles to the back, from the surroundings being provided for the supply inside the device that are powered by the rechargeable batteries 10.

Den Innenaufbau des Gerätes zeigen nun die Figuren 2 und 3 genauer:

  • Das Herzstück des auf einer Trageplatte 32 aufgebauten Gerätes ist der längliche Grundkörper 12, der der Länge nach von einem Kanal 11 durchsetzt wird. An seinem hinteren Ende, das der Luftzufuhr dient, ist ein hohles Gehäuseteil 13 angesetzt, an welchem seitlich zwei weitere Ansaugteile 14 und 15 sitzen, die ebenfalls hohl sind. Auf dem oberen Ende des Grundkörpers 12 sitzt das ebenfalls hohle Luftaustrittsteil 17, aus welchem die Atemluft in den Anzug abgeführt wird. Durch die Hohlräume der unteren Teile 13, 14 und 15 erfolgt die später genauer beschriebene Atemluftzufuhr in das Gerät.
Figures 2 and 3 now show the internal structure of the device in more detail:
  • The heart of the device built on a support plate 32 is the elongated base body 12, which is penetrated lengthways by a channel 11. At its rear end, which serves the air supply, a hollow housing part 13 is attached, on which two further suction parts 14 and 15 sit laterally, which are also hollow. The likewise hollow air outlet part 17, from which the breathing air is discharged into the suit, sits on the upper end of the base body 12. The breathing air supply into the device, which will be described in more detail later, takes place through the cavities of the lower parts 13, 14 and 15.

Am oberen Ende des Luftaustrittsteiles 17 bzw. des Kanales 11 sitzen die Atemluftschläuche 5, in welche die Atemluft von dem Kanal 11 her einströmt. Seitlich unterhalb der Schläuche 5, etwa bei der Linie 16, sind die Teilschläuche 6 am Luftaustrittsstück 17 an den Kanal 11 angeschlossen (in den Figuren 2 und 3 nicht näher dargestellt).At the upper end of the air outlet part 17 or the channel 11 are the breathing air tubes 5, into which the breathing air flows in from the channel 11. Laterally below the tubes 5, for example at line 16, the partial tubes 6 on the air outlet piece 17 are connected to the channel 11 (not shown in more detail in FIGS. 2 and 3).

Im Grundkörper 12 sind im Kanal 11 hintereinander zwei Gebläse 18 vorhanden, die die Luft in den Kanal 11 in Pfeilrichtung 19 zum Luftaustrittsteil 17 bzw. den Schläuchen 5 und 6 fördern. Die Motoren werden elektrisch mittels wiederaufladbarer Batterien angetrieben. Die Luftansaugung erfolgt über die Ansaugöffnungen 7, die im inneren der Ansaugteile 14 und 15 zum Gehäuseteil 13 hin umgelenkt sind und von dort aus von der Seite her in den Kanal 11 münden.In the base body 12 there are two blowers 18 in a row in the duct 11, which convey the air into the duct 11 in the direction of the arrow 19 to the air outlet part 17 or the hoses 5 and 6. The motors are powered electrically by rechargeable batteries. The air intake takes place via the intake openings 7, which are deflected in the interior of the intake parts 14 and 15 towards the housing part 13 and from there open into the channel 11 from the side.

An dem Gerät sind als Besonderheit nun zwei verschiedene Atemluftzufuhrsysteme vorhanden. Die Luftzufuhr beider in den Kanal 11 erfolgt über das innere des Gehäuseteiles 13 zum Lauftaustrittsteil 17.As a special feature, the device now has two different breathing air supply systems. The air is supplied to both of them in the channel 11 via the interior of the housing part 13 to the barrel outlet part 17.

Im normalen Betriebszustand erfolgt die Luftzufuhr als Druckluft aus einem Atemluftversorgungsnetz über den Schlauch 3, der über die Öffnung 27 der Bohrungen 21 in dem Eintrittsstück 20 an den Kanal 11 angeschlossen ist. Das Eintrittsstück 20 ist hohl ausgeführt und weist Bohrungen bzw. Durchtrittsöffnungen 21 zur Verbindung der Schläuche 3 mit dem Kanal 11 auf. In dem Eintrittsstück 20 sitzt neben einem Schalldämpfer 31 ein Druckwächter 22 im Nebenschluß, der den Druck der Luft 4 überwacht und bei abfallendem Druck die Gebläse 18 für den zweiten Betriebszustand einschaltet. Die Lufteinspeisung aus der Bohrung 21 des Eintittsstückes 20 in den unteren Bereich des Kanales 11 im Gehäuseteil 13 erfolgt nun auf besondere Weise:

  • Auf die in den Kanal 11 dort einmündende Öffnung 23 der Bohrungen 21 ist ein nach oben in den Kanal 11 ragendes Injektorrohr 24 geschraubt (siehe Figur 3), dessen Austrittsöffnung 25 in den Kanal 11 ein Stück oberhalb der im Gehäuseteil 13 seitlich einmündenden Ansaugöffnung für die Atemluft des zweiten Betriebszustandes liegt. Dadurch liegt die Injektoröffnung 25 -in Strömungsrichtung 19 bzw. 26 der Luft gesehen- hinter der bzw. den anderen Öffnungen 7. Dadurch wird in Bezug auf diese eine Injektorwirkung der Luftströmung erzielt, die ein Zurückströmen der Luft entgegen der Richtung 26 in die Öffnungen 7 bzw. die Filter 8 verhindert, wodurch auf ein besonderes Rückschlagventil im Gerät verzichtet werden kann. Ein solches Rückschlagventil würde zusätzliche Druckverluste im Gerät bedeuten.
In the normal operating state, the air is supplied as compressed air from a breathing air supply network via the hose 3, which is connected to the channel 11 via the opening 27 of the bores 21 in the inlet piece 20. Entry piece 20 is hollow and has bores or through openings 21 for connecting the hoses 3 to the channel 11. In the inlet piece 20 sits next to a silencer 31, a pressure switch 22 in the bypass, which monitors the pressure of the air 4 and switches on the blower 18 for the second operating state when the pressure drops. The air feed from the bore 21 of the inlet piece 20 into the lower region of the channel 11 in the housing part 13 now takes place in a special way:
  • An injector tube 24 projecting upward into the channel 11 is screwed onto the opening 23 of the bores 21 opening into the channel 11 (see FIG. 3), the outlet opening 25 into the channel 11 a little above the suction opening for the side opening into the housing part 13 Breath air of the second operating state is. As a result, the injector opening 25 lies — seen in the direction of flow 19 or 26 of the air — behind the other opening 7. In this way, an injector effect of the air flow is achieved in relation to this, which prevents the air from flowing back against the direction 26 into the openings 7 or prevents the filter 8, making it possible to dispense with a special check valve in the device. Such a check valve would mean additional pressure losses in the device.

Das Gerät weist somit für die Atemluftausgänge 5 zwei getrennte Quellen bzw. Versorgungslufteingänge 9, 7 und 4, 27 auf, für deren Trennung voneinander keine besonderen mechanischen Umschalter mehr benötigt werden, da beim Abnehmen des Schlauches 4 die Kupplung 28 automatisch schließt oder bei Druckabfall der Luft 4 die Gebläse 18 über den Wächter 22 automatisch eingeschaltet werden. Somit kann auch in diesem Fall die Luft nicht durch den Schlauch 4 rückwärts abströmen, sondern wird vollständig ins Luftaustrittsteil 17 gefödert. Dadurch kann auch keine Kontamination durch den Schlauch 4 angesaugt werden.The device thus has two separate sources or supply air inlets 9, 7 and 4, 27 for the breathing air outlets 5, for the separation of which from one another no special mechanical changeover switches are required, since the coupling 28 closes automatically when the hose 4 is removed or when the pressure drops Air 4, the blowers 18 are automatically switched on by the monitor 22. Thus, even in this case, the air cannot flow backwards through the hose 4, but is completely conveyed into the air outlet part 17. As a result, no contamination can be sucked through the hose 4.

Zusammengefaßt weist das Gerät somit als Besonderheit zwei Betriebszustände auf:

  • 1. Den Normalbetrieb: Atemluft 4 über den Schlauch 3 und das Injektorrohr 24, Druckerzeugung durch das externe Atemluftversorgungsnetz.
  • 2. Abgekuppelter Betrieb: Atemluft 9 aus der Umgebung über die Filter 8 durch das Gebläse 18 mit automatischer Umschaltung jeweils vom einen auf den anderen Zustand.
In summary, the device has two special operating states:
  • 1. Normal operation: breathing air 4 via the hose 3 and the injector tube 24, pressure generation by the external breathing air supply network.
  • 2. Uncoupled operation: breathing air 9 from the environment through the filter 8 through the blower 18 with automatic switchover from one state to the other.

Das Gerät erlaubt somit die Kombination von zwei Einsatzarten, einmal autonomes Arbeiten mit Filter bei Schlauchunabhängigkeit für kürzere Einsätze und einmal Luft aus einem Druckluftnetz, d.h. schlauchgebunden für länger dauernde Einsätze. Es sind somit Arbeiten, die in kurzer Zeit bewältigt werden können oder solche für die mehrere Stunden eingesetzt werden müssen mit einem Gerät möglich. Dabei ist natürlich optimale Bewegungsfreiheit gewährleistet. Wenn mit dem Gerät vorwiegend mit Druckluft aus einem Atemluftversorgungsnetz gearbeitet wird, dient der autonome Teil als sogen. "Notbelüftung", die sich automatisch unterhalb eines definierten Druckes einschalten kann.The device thus allows the combination of two types of use, firstly autonomous working with a filter with hose independence for shorter uses and once air from a compressed air network, i.e. hose-bound for longer-term use. It is therefore possible to work with one device in a short time, or to work for several hours. Of course, optimal freedom of movement is guaranteed. If the device is mainly used with compressed air from a breathing air supply network, the autonomous part serves as a so-called. "Emergency ventilation", which can switch on automatically below a defined pressure.

BezugszeichenlisteReference symbol list

  • 1 Gesamtgerät1 complete device
  • 2 Schutzanzug2 protective suit
  • 3 Schlauch3 hose
  • 4 Atemluft aus Netz4 breathable air from the network
  • 5 Atemluftschläuche5 breathing air tubes
  • 6 Teilschläuche6 partial hoses
  • 7 Ansaugöffnungen7 suction openings
  • 8 Filter8 filters
  • 9 Atemluft aus Umgebung9 Breathing air from the environment
  • 10 Batterien10 batteries
  • 11 Kanal11 channel
  • 12 Grundkörper12 basic bodies
  • 13 unterer Gehäuseteil13 lower housing part
  • 14 Ansaugteil14 suction part
  • 15 Ansaugteil15 suction part
  • 16 Anschlußlinie16 connecting line
  • 17 Luftaustrittsteil17 air outlet part
  • 18 Gebläse18 blowers
  • 19 Förderrichtung19 Direction of conveyance
  • 20 Eintrittsstück20 entry piece
  • 21 Bohrungen21 holes
  • 22 Druckwächter22 pressure switches
  • 23 Öffnung23 opening
  • 24 Injektorrohr24 injector tube
  • 25 Austrittsöffnung25 outlet opening
  • 26 Strömungsrichtung in 1326 flow direction in 13
  • 27 Öffnung27 opening
  • 28 Kupplung28 clutch
  • 29 Druckschalter29 pressure switch
  • 30 Öffnung30 opening
  • 31 Schalldämpfer31 silencer
  • 32 Trageplatte32 support plate

Claims (3)

1. Atemluftversorgungsgerät für Schutzanzüge und/oder Kopfhauben zum vorzugsweisen Umschnallen auf den Rücken mit den folgenden Merkmalen: a) Das Gerät weist einen Grundkörper (12) auf, der der Länge nach von einem Kanal (11) durchsetzt ist, b) an dem oberen Ende des Kanales (11) sind die in die Arme oder die Haube führenden Atemluft und/oder Belüftungsschläuche (5, 6) angeschlossen, c) am unteren Ende des Kanales (11) sind rechtwinklig zu ihr vom Rücken wegführende, ein oder mehrere Atemlufteingänge (7) vorhanden, die mittels Filter (8) gegenüber der Umgebung verschlossen sind, d) in dem Kanal (11) sind ein oder mehrere in Richtung vom Eingang (7) zu den Atemluftschläuchen (5, 6) fördernde Gebläse (18) für Umgebungsluft vorhanden,
gekennzeichnet durch die weiteren Merkmale: e) Zusätzlich zu den Eingängen (7) für die Gebläse- bzw. Umgebungsluft (9) ist am unteren Ende des Kanales (11) ein weiterer Eingang bzw. eine Öffnung (27) für den Anschluß desselben an Antemluft (4) aus einem Versorgungsnetz vorhanden, der gegenüber der Luftversorgung durch die Gebläse (18) an- und abkoppelbar ist. 1. Breathing air supply device for protective suits and / or hoods for preferably buckling on the back with the following features: a) The device has a base body (12) which is penetrated lengthways by a channel (11), b) the breathing air and / or ventilation hoses (5, 6) leading into the arms or hood are connected to the upper end of the channel (11), c) at the lower end of the channel (11) are perpendicular to it from the back de, one or more breathing air inlets (7) are present, which are closed off from the environment by means of filters (8), d) in the channel (11) there are one or more fans (18) for ambient air, which convey in the direction from the entrance (7) to the breathing air tubes (5, 6),
characterized by the other features: e) In addition to the inputs (7) for the blower or ambient air (9) is at the lower end of the channel (11) a further input or opening (27) for connecting the same to breathing air (4) from a supply network available, which can be connected and disconnected from the air supply by the blower (18). 2. Gerät nach Anspruch 1, gekennzeichnet durch die weiteren Merkmale: f) In den Kanal (11) ragt zur Einspeisung für die Luft (4) aus dem Netz ein Injektorrohr (24), dessen Austrittsöffnung (25) -in Strömung (26) der Luft im Kanal (11) gesehenhinter der bzw. den Ansaugöffnungen (7) für die Umgebungsluft (9) gelegen ist, g) das Injektorrohr (24) ist mit der Öffnung (27) direkt verbunden bzw. wird aus dieser beaufschlagt. 2. Device according to claim 1, characterized by the further features: f) An injector tube (24) projects into the channel (11) for feeding the air (4) from the network, its outlet opening (25) - seen in flow (26) of the air in the channel (11) behind the or the suction openings (7) for the ambient air (9), g) the injector tube (24) is directly connected to the opening (27) or is acted upon from it. 3. Gerät nach Anspruch 1 oder Anspruch 2, gekennzeichnet durch die weiteren Merkmale: h) zwischen Injektorrohr (24) und Öffnung (27) ist im Nebenschluß ein Druckwächter (22) vorhanden, der bei Druckabfall am Eingang (27) die Gebläse (18) für die Umgebungsluft (9) in Betrieb setzt und umgekehrt. 3. Device according to claim 1 or claim 2, characterized by the further features: h) between the injector tube (24) and the opening (27) in the shunt there is a pressure switch (22) which, in the event of a pressure drop at the inlet (27), starts the blower (18) for the ambient air (9) and vice versa.
EP90112554A 1990-07-02 1990-07-02 Breathing air supply apparatus Expired - Lifetime EP0464234B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT90112554T ATE114985T1 (en) 1990-07-02 1990-07-02 BREATHING AIR DEVICE.
EP90112554A EP0464234B1 (en) 1990-07-02 1990-07-02 Breathing air supply apparatus
DE59007943T DE59007943D1 (en) 1990-07-02 1990-07-02 Breathing air supply device.
ES90112554T ES2068285T3 (en) 1990-07-02 1990-07-02 AIR SUPPLY APPARATUS FOR BREATHING.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90112554A EP0464234B1 (en) 1990-07-02 1990-07-02 Breathing air supply apparatus

Publications (2)

Publication Number Publication Date
EP0464234A1 true EP0464234A1 (en) 1992-01-08
EP0464234B1 EP0464234B1 (en) 1994-12-07

Family

ID=8204163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90112554A Expired - Lifetime EP0464234B1 (en) 1990-07-02 1990-07-02 Breathing air supply apparatus

Country Status (4)

Country Link
EP (1) EP0464234B1 (en)
AT (1) ATE114985T1 (en)
DE (1) DE59007943D1 (en)
ES (1) ES2068285T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6796304B2 (en) * 2002-04-12 2004-09-28 3M Innovative Properties Company Personal containment system with sealed passthrough

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HK1062767A2 (en) 2003-08-26 2004-10-29 Winsource Ind Ltd Isolation suit with two-way air supply/disinfection pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284054A (en) * 1941-09-09 1942-05-26 Hermann Siegwart Gas mask
DE2612877C2 (en) * 1976-03-26 1985-06-20 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Breathing air supply device
EP0241188A1 (en) * 1986-04-03 1987-10-14 Racal Safety Limited Improvements in and relating to breathing apparatus
US4899740A (en) * 1989-01-17 1990-02-13 E. D. Bullard Company Respirator system for use with a hood or face mask

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2284054A (en) * 1941-09-09 1942-05-26 Hermann Siegwart Gas mask
DE2612877C2 (en) * 1976-03-26 1985-06-20 Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe Breathing air supply device
EP0241188A1 (en) * 1986-04-03 1987-10-14 Racal Safety Limited Improvements in and relating to breathing apparatus
US4899740A (en) * 1989-01-17 1990-02-13 E. D. Bullard Company Respirator system for use with a hood or face mask

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6796304B2 (en) * 2002-04-12 2004-09-28 3M Innovative Properties Company Personal containment system with sealed passthrough

Also Published As

Publication number Publication date
EP0464234B1 (en) 1994-12-07
DE59007943D1 (en) 1995-01-19
ES2068285T3 (en) 1995-04-16
ATE114985T1 (en) 1994-12-15

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