EP0536546A1 - Blower assisted breathing protection apparatus with attachable control member - Google Patents
Blower assisted breathing protection apparatus with attachable control member Download PDFInfo
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- EP0536546A1 EP0536546A1 EP92115316A EP92115316A EP0536546A1 EP 0536546 A1 EP0536546 A1 EP 0536546A1 EP 92115316 A EP92115316 A EP 92115316A EP 92115316 A EP92115316 A EP 92115316A EP 0536546 A1 EP0536546 A1 EP 0536546A1
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- blower unit
- breathing
- control unit
- gas
- blower
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- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 42
- 230000000241 respiratory effect Effects 0.000 claims abstract description 16
- 230000000717 retained effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims 6
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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 invention relates to a respirator with a respirator, to the respiratory gas inlet of which a particle or respiratory gas filter and a blower unit supporting breathing are connected, the blower unit being equipped with cable bushings for the electrical energy supply, and the respirator mask being connected directly to one another at least with the blower unit.
- Such a breathing apparatus has become known from EF-A-164 946.
- the respirator mask is directly connected to both the blower unit and the filter, the blower unit and filter being aligned with one another in the axial flow direction.
- the fan part of the blower unit which supports the breathing gas during inhalation, is once fluidly arranged behind the filter as a breathing gas suction fan wheel, but it can also be installed upstream of the filter in terms of flow, the fan part pushing the breathing gas through the filter into the breathing gas inlet of the respirator mask.
- the energy supply for the fan part is led out and through electrical lines from the blower unit a separate power supply (battery, control unit for the blower power and monitoring of the operating functions), which is attached as a separate component, for example, to the belt of the equipment carrier.
- a pressure sensor is provided which switches the blower unit on or off under certain circumstances via a switch. Both the sensor and the switch are fastened in a suitable place within the mask body, and their electrical connection is made to the power supply via separate cables.
- control modules required for monitoring the blower unit are each individually connected both to the blower unit and to the energy supply, and that after replacing filters with different breathing gas resistances, the monitoring elements (pressure sensor, switch) cannot adapt to the new conditions, such as flow resistance and delivery rate.
- the present invention is therefore based on the object of improving a respirator of the type mentioned in such a way that the blower output can be controlled independently of the filter type used and the filter service life according to predetermined setpoints, and the components controlling the blower output are attached to locations which are favorable for operation. and in the event of a filter change or changing loading condition of the installed filters during operation, the blower unit can be adapted to the changed performance parameters.
- the housing of the blower unit has a saddle-shaped upper part, via which a control unit adapted in terms of its outer dimensions to the contour of the upper part, the switching elements for the operation of the blower unit combined in an independent housing module, can be plugged on in a bow-like manner and thereby via electrical contact devices is connected to the cable bushings.
- the advantage of the invention lies essentially in the fact that the housing module for the control part can be placed separately on the upper part of the blower unit, wherein it contains the components necessary for the operation and wiring of the blower unit.
- the motor speed of the fan section can be monitored according to specified performance data and adjusted if necessary.
- the necessary blower power can be programmed into a data memory within the control unit, which can be passed on to the fan part of the blower unit and monitored via a speed setting.
- the fan part can be a radial or an axial fan, which is driven by an electric motor.
- Various types of coding can be used to ensure that the control unit required for the respiratory gas filter used is used.
- such a coding consists of a color marking on the control unit, which corresponds to the corresponding marking on the breathing gas filter.
- the flow resistance increases, so that the increased power consumption of the motor for the fan part is regulated accordingly. This can be done by a power controller within the control unit.
- a full face mask with a viewing window is used as a respiratory mask
- the blower unit is provided with the control unit required for operation.
- a simple coupling of the control unit to the upper part can be achieved in that the upper part has a semi-cylindrical shape, by means of which the control unit designed in the form of a horseshoe can be placed and engages around the upper part.
- the electrical line bushings as metallic contact pads on the surface of the housing of the blower unit.
- the control unit has contact pins at corresponding points which protrude from the housing surface and are pressed onto the contact pads when the control unit is attached.
- the type and number of contact pins and the associated contact pads can also be used to provide further coding for a suitable combination between control unit and breathing gas filter.
- a pressure line starting from the fan part of the blower unit to the surface of the housing of the blower unit, which ends there in a line mouth which is brought into a pressure-tight connection with a pressure inlet when the housing module of the control unit is plugged on. From the inlet, the pressure line continues to a pressure sensor within the control unit, so that the delivery pressure can always be measured and monitored. If a pressure limit is exceeded, which, for example, indicates that the breathing gas filter is fully loaded, there is an acoustic and / or visual warning.
- the pressure sensor is formed from a housing which is divided into two by a membrane, one housing part being connected to the pressure line and the other housing part being connected to the surroundings.
- a magnet on the membrane which is moved with the membrane depending on the prevailing pressure conditions. The position of the magnet and thus the currently prevailing pressure is converted into an electrical signal by a holding element. If, for example, the performance of the fan part of the blower unit is no longer sufficient to ensure sufficient overpressure in the breathing gas inlet, a pressure drop is generated with each breath, which triggers the warning when typically 0.1 mbar is reached.
- the control unit works in this way as a display unit, both in the normal operating state and in the event of a fault if the fan part fails by a simple resistance detection triggering the warning device.
- control unit contains a sensor element which responds in its composition to the breathing gas to be conveyed.
- the gas-sensitive measuring surface of the sensor element is led out via a gas sample line to the surface of the housing module to a measuring gas opening and is brought into a gas-tight connection to a measuring gas line in the blower unit when the housing module is attached.
- the sample gas line continues within the blower unit up to the breathing gas inlet through which the breathing gas is conveyed.
- the sensor element responds to those gas components within the breathing gas that are to be retained by the filter.
- An electrochemical measuring cell proves to be particularly suitable as a sensor element, since it is distinguished by an extremely low power consumption.
- control unit as an independent housing module on a corresponding upper part of the blower unit can be realized both for full masks and for half masks, without the features of the invention having to be changed or the advantages of the invention being diminished.
- FIG. 1 shows a breathing apparatus which, in conjunction with a full face mask (1), consists of a blower unit (2) which is connected on the one hand to the breathing gas inlet (3) of the mask (1) and on the other hand to the breathing gas filter (4).
- the blower unit (2) is thus in terms of flow between the breathing gas filter (4) and the breathing gas inlet (3).
- the blower unit (2) has a semi-cylindrical upper part (5), which is arranged in continuation of the center line of a viewing window (6) of the full face mask (1) in the field of view of the device wearer.
- the upper part (5) has a control unit (7) placed in a bow-like manner and brought into mechanical and electrical contact with the blower unit (2).
- a warning lamp (9) points in the direction of the viewing window (6) on an elevation (8).
- the partial section shown in FIG. 2 contains the breathing gas filter (4) in a filter housing (20), which is brought into flow connection with the blower unit (2) by means of a breathable gas permeable cover (21).
- the tight fit of the filter (4) is made by sealing pads (22).
- the blower unit (2) contains a fan part (23) in the form of an axial blower, which is connected to an electric motor (24).
- the necessary power lines (25) go from the electric motor (24) to metallic contact pads (26) which are attached to the surface of the blower unit (2).
- the blower unit (2) contains a pressure line (27), which is connected to the inside of the filter housing (20) and also opens on the surface of the blower unit (2), as well as a sample gas line (28), which also connects to the inside of the filter housing (20) is connected and opens on the surface of the blower unit (2).
- the housing module (7) of the control unit placed on the upper part (5) of the blower unit (2) contains a sensor element (29) designed as an electrochemical gas sensor, the gas sample line (36) at its sample gas opening (30) brought into line with the sample gas line (28) and a pressure sensor (31), the pressure inlet (32) of which is pressure-tightly connected to the mouth of the pressure line (27).
- a Central control unit (33) (microprocessor) is connected on the one hand via contact pins (34) to the contact pads (26) and on the other hand via connecting lines (not shown) to the pressure sensor (31), the gas sensor (29) and the warning lamp (9).
- the respiratory gas flow is indicated by the directional arrows (35).
- the double arrows (45) indicate the dividing line between the control unit (7) on the one hand and the blower unit (2) connected to the filter housing (20) on the other.
- the horseshoe-shaped housing module (7) of the control unit is shown in the view as it is brought into contact with the blower unit (2) when it is in place.
- Three contact pins (34) protrude from a recess (41) and form the connection to the contact pads (26).
- the sample gas opening (30) continues to the sensor (29) and is surrounded by a silicone seal (42).
- the delivery pressure inlet (32) is located underneath and is also surrounded by a silicone seal (42).
- the contour (43) of the housing module (7) adapted to the semi-cylindrical shape of the upper part (5) has a latching recess (44) into which a not shown latching lug of the blower unit (2) engages with its complementary shape.
- the elevation (8) carries the warning lamp (9) on its undetectable rear side.
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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)
Abstract
Description
Die Erfindung betrifft ein Atemschutzgerät mit einer Atemschutzmaske, an deren Atemgaseinlaß ein Partikel- oder Atemgasfilter und eine die Atmung unterstützende Gebläseeinheit angeschlossen sind, wobei die Gebläseeinheit mit Leitungsdurchführungen für die elektrische Energieversorgung ausgestattet ist, und die Atemschutzmaske zumindest mit der Gebläseeinheit unmittelbar aneinander verbunden ist.The invention relates to a respirator with a respirator, to the respiratory gas inlet of which a particle or respiratory gas filter and a blower unit supporting breathing are connected, the blower unit being equipped with cable bushings for the electrical energy supply, and the respirator mask being connected directly to one another at least with the blower unit.
Ein derartiges Atemschutzgerät ist aus der EF-A-164 946 bekanntgeworden.Such a breathing apparatus has become known from EF-A-164 946.
Bei dem bekannten Atemschutzgerät ist die Atemschutzmaske sowohl mit der Gebläseeinheit als auch mit dem Filter unmittelbar verbunden, wobei Gebläseeinheit und Filter in strömungsmäßig axialer Richtung zueinander ausgerichtet sind. Das die Atemgasförderung während der Einatmung unterstützende Lüfterteil der Gebläseeinheit ist einmal strömungsmäßig hinter dem Filter als atemgassaugendes Lüfterrad angeordnet, es kann aber auch strömungsmäßig vor dem Filter eingebaut sein, wobei das Lüfterteil das Atemgas durch das Filter in den Atemgaseinlaß der Atemschutzmaske hineindrückt. In beiden Fällen wird die Energieversorgung für das Lüfterteil über elektrische Leitungen aus der Gebläseeinheit hinausgeführt und zu einer separaten Energieversorgung (Batterie, Steuereinheit für die Gebläseleistung und Überwachung der Betriebsfunktionen) weitergeführt, welche als separates Bauteil zum Beispiel am Gürtel des Geräteträgers befestigt ist. Zur Überwachung der ordnungsgemäßen Funktion der Gebläseeinheit ist ein Drucksensor vorgesehen, der über einen Schalter unter gegebenen Umständen die Gebläseeinheit ein- bzw. ausschaltet. Sowohl Sensor als auch Schalter sind innerhalb des Maskenkörpers an geeigneter Stelle befestigt, und ihre elektrische Verbindung wird über separate Kabel mit der Energieversorgung hergestellt.In the known respirator, the respirator mask is directly connected to both the blower unit and the filter, the blower unit and filter being aligned with one another in the axial flow direction. The fan part of the blower unit, which supports the breathing gas during inhalation, is once fluidly arranged behind the filter as a breathing gas suction fan wheel, but it can also be installed upstream of the filter in terms of flow, the fan part pushing the breathing gas through the filter into the breathing gas inlet of the respirator mask. In both cases, the energy supply for the fan part is led out and through electrical lines from the blower unit a separate power supply (battery, control unit for the blower power and monitoring of the operating functions), which is attached as a separate component, for example, to the belt of the equipment carrier. To monitor the proper functioning of the blower unit, a pressure sensor is provided which switches the blower unit on or off under certain circumstances via a switch. Both the sensor and the switch are fastened in a suitable place within the mask body, and their electrical connection is made to the power supply via separate cables.
Bei der bekannten Anordnung ist es von Nachteil, daß die für die Überwachung der Gebläseeinheit erforderlichen Steuerbausteine jeder für sich sowohl mit der Gebläseeinheit als auch mit der Energieversorgung verbunden ist, und daß man nach Auswechseln von Filtern mit unterschiedlichen Atemgaswiderständen die Überwachungselemente (Drucksensor, Schalter) nicht auf die neuen Gegebenheiten, wie etwa Durchströmungswiderstand und Förderleistung, anpassen kann.In the known arrangement, it is disadvantageous that the control modules required for monitoring the blower unit are each individually connected both to the blower unit and to the energy supply, and that after replacing filters with different breathing gas resistances, the monitoring elements (pressure sensor, switch) cannot adapt to the new conditions, such as flow resistance and delivery rate.
Der vorliegenden Erfindung liegt somit die Aufgabe zugrunde, ein Atemschutzgerät der genannten Art so zu verbessern, daß die Gebläseleistung unabhängig von eingesetztem Filtertyp, und der Filtergebrauchsdauer nach vorgegebenen Sollwerten steuerbar ist, und die die Gebläseleistung steuernden Bauteile an für den Betrieb günstigen Orten angebracht sind, sowie bei einem Filterwechsel oder bei sich veränderndem Beladungszustand der eingebauten Filter während des Betriebs die Gebläseeinheit den veränderten Leistungsparametern angepaßt werden kann.The present invention is therefore based on the object of improving a respirator of the type mentioned in such a way that the blower output can be controlled independently of the filter type used and the filter service life according to predetermined setpoints, and the components controlling the blower output are attached to locations which are favorable for operation. and in the event of a filter change or changing loading condition of the installed filters during operation, the blower unit can be adapted to the changed performance parameters.
Die Lösung der Aufgabe erfolgt dadurch, daß das Gehäuse der Gebläseeinheit ein sattelförmiges Oberteil besitzt, über das eine in ihren äußeren Abmessungen der Kontur des Oberteils angepaßte, die Schaltelemente für den Betrieb der Gebläseeinheit in einem eigenständigen Gehäusemodul zusammengefaßte Steuereinheit bügelartig aufsteckbar und dabei über elektrische Kontaktvorrichtungen mit den Leitungsdurchführungen in Verbindung gebracht ist.The object is achieved in that the housing of the blower unit has a saddle-shaped upper part, via which a control unit adapted in terms of its outer dimensions to the contour of the upper part, the switching elements for the operation of the blower unit combined in an independent housing module, can be plugged on in a bow-like manner and thereby via electrical contact devices is connected to the cable bushings.
Der Vorteil der Erfindung liegt im wesentlichen darin, daß das Gehäusemodul für den Steuerteil separat auf das Oberteil der Gebläseeinheit aufsetzbar ist, wobei es in seinem Inneren die für den Betrieb und die Beschaltung der Gebläseeinheit erforderlichen Bauelemente enthält. Unabhängig von der benutzten Filterart kann die Motordrehzahl des Lüfterteils nach vorgegebenen Leistungsdaten überwacht und gegebenenfalls nachgeregelt werden. Dabei kann in einem Datenspeicher innerhalb der Steuereinheit die notwendige Gebläseleistung einprogrammiert sein, die über eine Drehzahlvorgabe an das Lüfterteil der Gebläseeinheit weitergeben und überwacht werden kann. Das Lüfterteil kann dabei ein Radial- oder ein Axialgebläse sein, welches über einen Elektromotor angetrieben wird. Über verschiedenartige Kodierungen kann sichergestellt werden, daß die jeweilige für den eingesetzten Atemgasfilter notwendige Steuereinheit eingesetzt wird. Im einfachsten Fall besteht eine derartige Kodierung aus einer Farbmarkierung der Steuereinheit, welche mit der entsprechenden Markierung des Atemgasfilters übereinstimmt. Bei zunehmender Filterbeladung erhöht sich der Strömungswiderstand, so daß die vermehrte Leistungsaufnahme des Motors für das Lüfterteil entsprechend geregelt wird. Dies kann durch einen Leistungsregler innerhalb der Steuereinheit bewerkstelligt werden.The advantage of the invention lies essentially in the fact that the housing module for the control part can be placed separately on the upper part of the blower unit, wherein it contains the components necessary for the operation and wiring of the blower unit. Regardless of the type of filter used, the motor speed of the fan section can be monitored according to specified performance data and adjusted if necessary. In this case, the necessary blower power can be programmed into a data memory within the control unit, which can be passed on to the fan part of the blower unit and monitored via a speed setting. The fan part can be a radial or an axial fan, which is driven by an electric motor. Various types of coding can be used to ensure that the control unit required for the respiratory gas filter used is used. In the simplest case, such a coding consists of a color marking on the control unit, which corresponds to the corresponding marking on the breathing gas filter. With increasing filter loading, the flow resistance increases, so that the increased power consumption of the motor for the fan part is regulated accordingly. This can be done by a power controller within the control unit.
Wird als Atemschutzmaske eine Vollmaske mit einer Sichtscheibe benutzt, ist es zweckmäßig, das Oberteil unmittelbar mit dem Maskenkörper zu verbinden, wobei die Gebläseeinheit mit ihrem Lüfterteil den Atemeinlaß bildet, und das Oberteil in Verlängerung der Mittellinie des Sichtfensters über dem Atemgaseinlaß angeordnet ist. Für den Maskenträger ist jetzt auf einfache weise sofort erkennbar, ob die Gebläseeinheit mit der für den Betrieb erforderlichen Steuereinheit versehen ist.If a full face mask with a viewing window is used as a respiratory mask, it is expedient to connect the upper part directly to the mask body, the blower unit forming the breathing inlet with its fan part, and the upper part being arranged in the extension of the center line of the viewing window above the breathing gas inlet. For the mask wearer, it is now easy to see immediately whether the blower unit is provided with the control unit required for operation.
Eine einfache Ankopplung der Steuereinheit mit dem Oberteil ist dadurch verwirklichbar, daß das Oberteil eine halbzylindrische Form aufweist, über das die in Hufeisenform ausgestaltete Steuereinheit aufsetzbar ist und das Oberteil umgreift.A simple coupling of the control unit to the upper part can be achieved in that the upper part has a semi-cylindrical shape, by means of which the control unit designed in the form of a horseshoe can be placed and engages around the upper part.
Zur Herstellung der elektrischen Verbindung ist es günstig, die elektrischen Leitungsdurchführungen als metallische Kontaktpolster auf der Oberfläche des Gehäuses der Gebläseeinheit aufzubringen. Die Steuereinheit besitzt an entsprechenden Stellen Kontaktstifte, die aus der Gehäuseoberfläche herausragen und bei aufgesetzter Steuereinheit auf die Kontaktpolster aufgepreßt sind. Über Art und Anzahl der Kontaktstifte und der dazugehörigen Kontaktpolster kann darüberhinaus eine weitere Kodierung für eine geeignete Kombination zwischen Steuereinheit und Atemgasfilter herbeigeführt werden.To establish the electrical connection, it is expedient to apply the electrical line bushings as metallic contact pads on the surface of the housing of the blower unit. The control unit has contact pins at corresponding points which protrude from the housing surface and are pressed onto the contact pads when the control unit is attached. The type and number of contact pins and the associated contact pads can also be used to provide further coding for a suitable combination between control unit and breathing gas filter.
Um die Förderleistung der Gebläseeinheit zu überwachen, ist es vorteilhaft, eine Druckleitung ausgehend von dem Lüfterteil der Gebläseeinheit bis zur Oberfläche des Gehäuses der Gebläseeinheit vorzusehen, die dort in einer Leitungsmündung endet, die bei aufgestecktem Gehäusemodul der Steuereinheit mit einem Druckeinlaß in druckdichte Verbindung gebracht wird. Von dem Einlaß setzt sich die Druckleitung fort zu einem Drucksensor innerhalb der Steuereinheit, so daß der Förderdruck stets gemessen und überwacht werden kann. Bei Überschreiten einer Druckgrenze, welche z.B. die vollständige Beladung des Atemgasfilters anzeigt, erfolgt eine akustische und/oder optische Warnung. Im einfachsten Fall ist der Drucksensor aus einem Gehäuse gebildet, das über eine Membran zweigeteilt ist, wobei der eine Gehäuseteil mit der Druckleitung und der andere Gehäuseteil mit der Umgebung verbunden ist. Auf der Membran befindet sich ein Magnet, welcher je nach den herrschenden Druckverhältnissen mit der Membran bewegt wird. Die Position des Magneten und somit der momentan herrschende Druck wird von einem Halteelement in ein elektrisches Signal umgewandelt. Reicht beispielsweise die Leistung des Lüfterteils der Gebläseeinheit nicht mehr aus, um einen genügenden Überdruck im Atemgaseinlaß sicherzustellen, wird mit jedem Atemzug ein Druckabfall erzeugt, der bei Erreichen von typischerweise 0,1 mbar die Warnung auslöst. Die Steuereinheit arbeitet in dieser Weise als Anzeigeeinheit, und zwar sowohl in normalem Betriebszustand als auch im Fehlerfall, wenn der Lüfterteil ausfällt, indem eine einfache Widerstandserkennung die Warnvorrichtung auslöst.To monitor the delivery rate of the blower unit, it is advantageous to provide a pressure line starting from the fan part of the blower unit to the surface of the housing of the blower unit, which ends there in a line mouth which is brought into a pressure-tight connection with a pressure inlet when the housing module of the control unit is plugged on. From the inlet, the pressure line continues to a pressure sensor within the control unit, so that the delivery pressure can always be measured and monitored. If a pressure limit is exceeded, which, for example, indicates that the breathing gas filter is fully loaded, there is an acoustic and / or visual warning. In the simplest case, the pressure sensor is formed from a housing which is divided into two by a membrane, one housing part being connected to the pressure line and the other housing part being connected to the surroundings. There is a magnet on the membrane, which is moved with the membrane depending on the prevailing pressure conditions. The position of the magnet and thus the currently prevailing pressure is converted into an electrical signal by a holding element. If, for example, the performance of the fan part of the blower unit is no longer sufficient to ensure sufficient overpressure in the breathing gas inlet, a pressure drop is generated with each breath, which triggers the warning when typically 0.1 mbar is reached. The control unit works in this way as a display unit, both in the normal operating state and in the event of a fault if the fan part fails by a simple resistance detection triggering the warning device.
Zur besseren Befestigung und Sicherung gegen Erschütterungen ist es güntig, das Gehäuse der Gebläseeinheit mit Rastnasen auszustatten, in die entsprechende Rastausnehmungen der auf das Oberteil aufgesteckten Steuereinheit einrasten.For better fastening and protection against vibrations, it is expedient to equip the housing of the blower unit with locking lugs into which corresponding locking recesses of the control unit plugged onto the upper part snap.
Eine bedeutende Erweiterung im Sinne einer vollständigen Überwachung der Leistungsfähigkeit der Gebläseeinheit und der Filterwirksamkeit des Atemgasfilters ist darin zu sehen, daß die Steuereinheit ein Fühlerelement enthält, welches auf das zu fördernde Atemgas in seiner Zusammensetzung anspricht. Die gassensitive Meßoberfläche des Fühlerelementes ist über eine Gasprobenleitung an die Oberfläche des Gehäusemoduls zu einer Meßgasöffnung herausgeführt und wird bei aufgestecktem Gehäusemodul in gasdichter Verbindung zu einer Meßgasleitung in der Gebläseeinheit gebracht. Die Meßgasleitung setzt sich innerhalb der Gebläseeinheit bis zu dem Atemgaseinlaß fort, durch den das Atemgas gefördert wird. Je nach benutztem Filter spricht das Fühlerelement auf solche Gaskomponenten innerhalb des Atemgases an, welche durch das Filter zurückgehalten werden sollen. Bei zunehmender Beladung des Atemgasfilters mit dem zurückzuhaltenden Schadstoff können schon für den Geräteträger unbemerkt Schadstoffe durch das Atemgasfilter durchdringen, die von dem wesentlich empfindlicheren Fühlerelement schon nachgewiesen werden. Eine entsprechende Warnung zeigt den sich anbahnenden Gasdurchbruch durch das Filter an, so daß der Geräteträger rechtzeitig entweder ein neues Filter einsetzen oder sich aus der Gefahrenzone zurückbegeben kann. Sämtliche Warnanzeigen können durch Warnlampen im Sichtbereich des Geräteträgers angebracht werden, so daß er durch die Sichtscheibe einer Atemschutzvollmaske jede Warnanzeige erkennen kann.An important extension in the sense of a complete monitoring of the performance of the blower unit and the filter effectiveness of the breathing gas filter can be seen in the fact that the control unit contains a sensor element which responds in its composition to the breathing gas to be conveyed. The gas-sensitive measuring surface of the sensor element is led out via a gas sample line to the surface of the housing module to a measuring gas opening and is brought into a gas-tight connection to a measuring gas line in the blower unit when the housing module is attached. The sample gas line continues within the blower unit up to the breathing gas inlet through which the breathing gas is conveyed. Depending on the filter used, the sensor element responds to those gas components within the breathing gas that are to be retained by the filter. With increasing loading of the respiratory gas filter with the pollutant to be retained, pollutants can pass through the respiratory gas filter unnoticed by the device wearer, which are already detected by the much more sensitive sensor element. A corresponding warning indicates the impending gas breakthrough through the filter, so that the device wearer can either insert a new filter in good time or return from the danger zone. All warning displays can be attached by warning lamps in the field of view of the wearer, so that he can recognize every warning display through the lens of a full face mask.
Besonders geeignet als Fühlereelement erweist sich eine elektrochemische Meßzelle, da sie sich durch einen äußerst geringen Stromverbrauch auszeichnet.An electrochemical measuring cell proves to be particularly suitable as a sensor element, since it is distinguished by an extremely low power consumption.
Die Anbringung der Steuereinheit als ein eigenständiges Gehäusemodul auf ein entsprechendes Oberteil der Gebläseeinheit läßt sich sowohl für Vollmasken als auch für Halbmasken verwirklichen, ohne daß die Merkmale der Erfindung geändert werden müßten oder die Vorteile der Erfindung geschmälert würden.The attachment of the control unit as an independent housing module on a corresponding upper part of the blower unit can be realized both for full masks and for half masks, without the features of the invention having to be changed or the advantages of the invention being diminished.
Ein Ausführungsbeispiel der Erfindung wird anhand der schematischen Zeichnung dargestellt und im folgenden näher erläutert.An embodiment of the invention is illustrated by the schematic drawing and explained in more detail below.
Es zeigen
- Fig. 1
- die Ansicht eines Atemschutzgerätes mit aufgesetzter Steuereinheit,
- Fig. 2
- einen Teilschnitt durch das Atemschutzgerät nach
Figur 1, - Fig. 3
- die Ansicht des Gehäusemoduls für die Steuereinheit auf diejenige Seitenfläche, welche mit der Gebläseeinheit in Verbindung zu bringen ist.
- Fig. 1
- the view of a breathing apparatus with control unit attached,
- Fig. 2
- 2 shows a partial section through the breathing apparatus according to FIG. 1,
- Fig. 3
- the view of the housing module for the control unit on the side surface which is to be connected to the blower unit.
In Figur 1 ist ein Atemschutzgerät dargestellt, welches in Verbindung mit einer Vollmaske (1) aus einer Gebläseeinheit (2) besteht, welche einerseits an den Atemgaseinlaß (3) der Maske (1) und andererseits an das Atemgasfilter (4) angeschlossen ist. Die Gebläseeinheit (2) befindet sich somit strömungsmäßig zwischen dem Atemgasfilter (4) und dem Atemgaseinlaß (3). Die Gebläseeinheit (2) besitzt ein halbzylinderförmiges Oberteil (5), welches in Fortsetzung der Mittellinie einer Sichtscheibe (6) der Vollmaske (1) im Sichtbereich des Geräteträgers angeordnet ist. Über dem Oberteil (5) ist eine Steuereinheit (7) bügelartig aufgesetzt und mit der Gebläseeineheit (2) in mechanischen und elektrischen Kontakt gebracht. Auf einer Erhebung (8) weist eine Warnlampe (9) in Richtung der Sichtscheibe (6). Bei aufgesetzter Vollmaske (1) legt sich eine Innenhalbmaske (10) mit Steuerventil (11) um den Nasen-Mundbereich eines nicht dargestellten Geräteträgers.FIG. 1 shows a breathing apparatus which, in conjunction with a full face mask (1), consists of a blower unit (2) which is connected on the one hand to the breathing gas inlet (3) of the mask (1) and on the other hand to the breathing gas filter (4). The blower unit (2) is thus in terms of flow between the breathing gas filter (4) and the breathing gas inlet (3). The blower unit (2) has a semi-cylindrical upper part (5), which is arranged in continuation of the center line of a viewing window (6) of the full face mask (1) in the field of view of the device wearer. About that The upper part (5) has a control unit (7) placed in a bow-like manner and brought into mechanical and electrical contact with the blower unit (2). A warning lamp (9) points in the direction of the viewing window (6) on an elevation (8). When the full face mask (1) is put on, an inner half mask (10) with control valve (11) is placed around the nose and mouth area of a device wearer (not shown).
Der in Figur 2 gezeigte Teilschnitt enthält das Atemgasfilter (4) in einem Filtergehäuse (20), welches mit einem atemgasdurchlässigen Deckel (21) mit der Gebläseeinheit (2) in Strömungsverbindung gebracht ist. Der feste Sitz des Filters (4) wird durch Dichtungspolster (22) hergestellt. Die Gebläseeinheit (2) enthält einen Lüfterteil (23) in Form eines Axialgebläses, das an einen Elektromotor (24) angeschlossen ist. Von dem Elektromotor (24) gehen die notwendigen Stromleitungen (25) zu metallischen Kontaktpolstern (26), welche an der Oberfläche der Gebläseeinheit (2) angebracht sind. Weiterhin enthält die Gebläseeinheit (2) eine Druckleitung (27), die mit dem Inneren des Filtergehäuses (20) verbunden ist und ebenfalls an der Oberfläche der Gebläseeinheit (2) mündet, sowie eine Meßgasleitung (28), die gleichfalls mit dem Inneren des Filtergehäuses (20) verbunden ist und an der Oberfläche der Gebläseeinheit (2) mündet. Der auf das Oberteil (5) der Gebläseeinheit (2) aufgesetzte Gehäusemodul (7) der Steuereinheit enthält ein als elektrochemischen Gassensor ausgebildetes Fühlerelement (29), dessen Gasprobenleitung (36) an ihrer Meßgasöffnung (30) mit der Meßgasleitung (28) in Deckung gebracht ist, sowie einen Drucksensor (31), dessen Druckeinlaß (32) mit der Mündung der Druckleitung (27) druckdicht verbunden ist. Eine Zentralsteuereinheit (33) (Mikroprozessor) ist einerseits über Kontaktstifte (34) an die Kontaktpolster (26) und andererseits über nicht dargestellte Verbindungsleitungen sowohl an den Drucksensor (31), den Gassensor (29) und die Warnlampe (9) angeschlossen. Die Atemgasströmung ist durch die Richtungspfeile (35) angedeutet. Die Doppelpfeile (45) geben die Trennlinie zwischen der Steuereinheit (7) einerseits und der mit dem Filtergehäuse (20) verbundenen Gebläseeinheit (2) andererseits an.The partial section shown in FIG. 2 contains the breathing gas filter (4) in a filter housing (20), which is brought into flow connection with the blower unit (2) by means of a breathable gas permeable cover (21). The tight fit of the filter (4) is made by sealing pads (22). The blower unit (2) contains a fan part (23) in the form of an axial blower, which is connected to an electric motor (24). The necessary power lines (25) go from the electric motor (24) to metallic contact pads (26) which are attached to the surface of the blower unit (2). Furthermore, the blower unit (2) contains a pressure line (27), which is connected to the inside of the filter housing (20) and also opens on the surface of the blower unit (2), as well as a sample gas line (28), which also connects to the inside of the filter housing (20) is connected and opens on the surface of the blower unit (2). The housing module (7) of the control unit placed on the upper part (5) of the blower unit (2) contains a sensor element (29) designed as an electrochemical gas sensor, the gas sample line (36) at its sample gas opening (30) brought into line with the sample gas line (28) and a pressure sensor (31), the pressure inlet (32) of which is pressure-tightly connected to the mouth of the pressure line (27). A Central control unit (33) (microprocessor) is connected on the one hand via contact pins (34) to the contact pads (26) and on the other hand via connecting lines (not shown) to the pressure sensor (31), the gas sensor (29) and the warning lamp (9). The respiratory gas flow is indicated by the directional arrows (35). The double arrows (45) indicate the dividing line between the control unit (7) on the one hand and the blower unit (2) connected to the filter housing (20) on the other.
In Figur 3 ist der hufeisenförmig ausgebildete Gehäusemodul (7) der Steuereinheit in derjenigen Ansicht gezeigt, wie er bei aufgesetztem Zustand in Kontakt mit der Gebläseeinheit (2) gebracht ist. Drei Kontaktstifte (34) ragen aus einer Vertiefung (41) heraus, und bilden die Anschlußverbindung zu den Kontaktpolstern (26). Die Meßgasöffnung (30) setzt sich zu dem Sensor (29) fort und ist mit einer Silikondichtung (42) umgeben. Der Förderdruckeinlaß (32) befindet sich darunter und ist ebenfalls von einer Silikondichtung (42) umrandet. Die der halbzylinderförmigen Form des Oberteils (5) angepaßte Kontur (43) des Gehäusemoduls (7) besitzt eine Rastausnehmung (44), in die eine nicht dargestellte Rastnase der Gebläseeinheit (2) mit ihrer komplementären Form eingreift. Die Erhebung (8) trägt auf ihrer nicht erkennbaren Rückseite die Warnlampe (9).In Figure 3, the horseshoe-shaped housing module (7) of the control unit is shown in the view as it is brought into contact with the blower unit (2) when it is in place. Three contact pins (34) protrude from a recess (41) and form the connection to the contact pads (26). The sample gas opening (30) continues to the sensor (29) and is surrounded by a silicone seal (42). The delivery pressure inlet (32) is located underneath and is also surrounded by a silicone seal (42). The contour (43) of the housing module (7) adapted to the semi-cylindrical shape of the upper part (5) has a latching recess (44) into which a not shown latching lug of the blower unit (2) engages with its complementary shape. The elevation (8) carries the warning lamp (9) on its undetectable rear side.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4133235 | 1991-10-07 | ||
DE4133235A DE4133235A1 (en) | 1991-10-07 | 1991-10-07 | FAN-SUPPORTED BREATHING DEVICE WITH AN ADD-ON CONTROL UNIT |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0536546A1 true EP0536546A1 (en) | 1993-04-14 |
EP0536546B1 EP0536546B1 (en) | 1995-12-06 |
Family
ID=6442212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92115316A Expired - Lifetime EP0536546B1 (en) | 1991-10-07 | 1992-09-08 | Blower assisted breathing protection apparatus with attachable control member |
Country Status (3)
Country | Link |
---|---|
US (1) | US5303701A (en) |
EP (1) | EP0536546B1 (en) |
DE (2) | DE4133235A1 (en) |
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- 1992-09-08 DE DE59204588T patent/DE59204588D1/en not_active Expired - Fee Related
- 1992-09-25 US US07/952,683 patent/US5303701A/en not_active Expired - Fee Related
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WO1996012523A1 (en) * | 1994-10-24 | 1996-05-02 | Minnesota Mining And Manufacturing Company | Exposure indicator with alarm signal |
WO1996012524A1 (en) * | 1994-10-24 | 1996-05-02 | Minnesota Mining And Manufacturing Company | Exposure indicating apparatus |
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US10508655B2 (en) | 2013-05-27 | 2019-12-17 | Dräger Safety AG & Co. KGaA | Blower filter system |
Also Published As
Publication number | Publication date |
---|---|
US5303701A (en) | 1994-04-19 |
EP0536546B1 (en) | 1995-12-06 |
DE4133235C2 (en) | 1993-09-23 |
DE59204588D1 (en) | 1996-01-18 |
DE4133235A1 (en) | 1993-04-08 |
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