EP2002411B1 - Smoke alarm - Google Patents
Smoke alarm Download PDFInfo
- Publication number
- EP2002411B1 EP2002411B1 EP08707782A EP08707782A EP2002411B1 EP 2002411 B1 EP2002411 B1 EP 2002411B1 EP 08707782 A EP08707782 A EP 08707782A EP 08707782 A EP08707782 A EP 08707782A EP 2002411 B1 EP2002411 B1 EP 2002411B1
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- EP
- European Patent Office
- Prior art keywords
- connecting piece
- smoke alarm
- measuring
- flow
- housing
- 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.)
- Not-in-force
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
- G08B17/113—Constructional details
Definitions
- the present invention relates to a smoke detector for arrangement in a bypass connected to a flow line, comprising a housing which has an inflow connection piece and an outflow connection piece, a measuring capsule arranged inside the housing, which is mounted on a support structure and equipped with a smoke measuring device ,
- the disclosure DE 29518042 U1 a smoke detector with a measuring capsule disposed within a housing, in which by means of a fan arranged in the housing, an active flow through the housing is brought about, wherein the sucked air is supplied to the housing via a laid in the space to be monitored pipe, which several the penetration the samples in the tube serving inlet openings.
- the mouth of the tube is directed to the measuring capsule, wherein the flow through the housing is monitored by means of air flow sensor.
- the smoke detector is in accordance with DE 102004036989 A1 certainly.
- the housing of this smoke detector has for this purpose a sampling tube and an ejection tube through which the sample stream flows into and out of the housing.
- a filter is provided in each case in the region of the mouth of the sample tube and the ejection tube in order to prevent the penetration of foreign bodies into the housing interior.
- an air flow thermistor is arranged inside the measuring capsule.
- smoke detectors which are not arranged in the space to be monitored, but rather outside of it, wherein the space to be monitored if necessary.
- smoke detectors are for example from the WO 97/30426 A1 .
- DE 102004036989 A1 DE 102004036989 A1 .
- the flow through the housing with the sample stream can be ensured by a fan if necessary (cf.
- GB 2347541 A or in the smoke detector a flow measuring device are integrated to monitor the flow through the smoke detector with sample gas (see. DE 102004036989 A1 and WO 97/30426 A1 ).
- the smoke detectors after the GB 2347541 A and the EP 130558 A1 have some constructive parallels to the smoke detector after the DE 102004036989 A1 on; and the smoke detector after the WO 97/30426 A1 is similar in some ways to that from the DE 29518042 U1 known smoke detector.
- the present invention is directed to such smoke detectors, which are arranged in a bypass connected to a flow line to - by monitoring the bypass flowing test gas partial stream with respect to smoke indicators - the presence of smoke and / or other fire indicators in the flow line flowing through Monitor gas.
- a typical area of application of such a bypass for certain smoke detectors connected to a flow line is aviation;
- such smoke detectors are integrated in ventilation systems for cabin ventilation of passenger aircraft. The same applies to the - generally cooling the equipment operated there - ventilation of technical rooms such as computer rooms.
- the housing of such a device intended for arrangement in a bypass connected to a flow line smoke detector regularly has an inflow connection piece and an outflow connecting piece, to which pipe or hose lines are connected, which open into the leading gas flow to be monitored flow line.
- a corresponding, known by public prior use smoke detector for arrangement in a bypass connected to a flow line has a substantially cylindrical housing. Essentially in an axial plane is one equipped with the evaluation Circuit board arranged, which at the same time forms the support structure for the flow-through measuring capsule, wherein the measuring capsule protrudes from the circuit board in the provided with the two connecting piece housing half.
- the present invention aims to provide a smoke detector for placement in a bypass connected to a flow line, which is particularly suitable for use in the field of aviation by satisfying high safety requirements with particularly compact external dimensions, in particular by the flow the smoke detector can be reliably monitored with a sample stream.
- a particular object of the present invention is also that the type of connection of the smoke detector - typically come in aerospace applications depending on the circumstances hose connections with connection hoses with an inner diameter of 20.7 mm or pipe connections with connecting pipes with an inner diameter of approx. 13 mm are used - without any substantial effect on the result of monitoring the flow through the smoke detector.
- a suitable for the arrangement in a bypass connected to a flow line and suitable smoke detectors comprising a housing having an inlet connection piece and an outflow connecting piece, a disposed within the housing through-flow measuring capsule, which attached to a support structure and equipped with a smoke measuring device, and also disposed within the housing flow measuring device, wherein the inflow connection piece is arranged offset to the measuring capsule by its axis passing the measuring capsule, and in a projecting into the interior of the housing tubular extension wherein, furthermore, the measuring capsule protrudes from the supporting structure in the direction of the extension of the inflow connecting piece, the mouth of which leads to a curved, a flow deflection in the direction of the measuring capsule Direction is directed.
- the inlet region for the sample stream is designed so that the inflow -AnMedicstutzen merges into a projecting into the interior of the housing tubular extension. Furthermore, a specific deflection area provided in which the outlet of the tubular extension leaving the sample stream in the direction of the measuring capsule. It is finally significant that the measuring capsule is not offset in the extension of the inflow connecting piece, but rather arranged offset to this, so that the sample stream just after the induced deflection by the deflector meets the measuring capsule.
- the thus executed smoke detector is characterized in particular by the fact that even with very small external dimensions, the type of connection of the smoke detector to the flow line has only a relatively small effect on the flow.
- the type of connection of the smoke detector to the flow line (tube with 13 mm inner diameter or hose with 20.7 mm inner diameter), which at a same mass flow of the smoke detector supplied sample flow through the Bypass deposits in significantly different flow rates of the sample flow in the area of the inflow port, has only negligible, negligible effects on the signal provided by the flow meter.
- the present invention thus provides a suitable and specific for the arrangement in a connected to a flow line bypass smoke detector, which due to its compact design as well as the fulfillment of high safety Requirements in a special way for use in aviation, with the additional addition that one and the same smoke detector is suitable for use with different connection variants (see above).
- the constructive and / or circuitry adjustment of the smoke detector used in each case to different installation situations and accordingly different connection variants.
- a first preferred development of the invention- ⁇ en smoke detector is characterized in that the axial length of the extension is at least 1.5 times the value of the inner diameter of the inflow connection piece.
- the inflow connection piece and its extension projecting into the interior of the housing can have the same inner diameter. However, this is not mandatory. Much more is in an individual case, an implementation of the present invention, without this would have significant adverse effects on the desired benefits, even with smoke detectors possible in which the inner diameter of the projecting into the housing interior extension of the inflow connection piece is smaller than the inner diameter of the inflow connection piece itself ,
- the deflection element is formed by a portion of the housing.
- the manufacturing cost of the smoke detector according to the invention keep low.
- the radius of curvature of the deflecting element is at least 1.5 times the value of the inner diameter of the inflow connecting piece.
- the inflow connection piece and the outflow connection piece lie substantially in a common plane, particularly preferably in that the axes of the two stubs are substantially parallel to one another run.
- the support structure for the measuring capsule which may be in particular a printed circuit board having a printed circuit, is substantially perpendicular to that through the axes of two connecting pieces defined plane, and more preferably parallel to the axes of the two Support.
- a particularly useful housing is characterized in that it consists of a flat base on which a socket for the electrical connection of the smoke detector to the other components of the reporting and monitoring system is arranged, and a substantially bell-shaped cap on the the two connecting pieces are arranged, joined together.
- the measuring capsule can protrude in particular so far from the support structure in the interior of the cap of the housing, that the mouth of the outflow connecting piece is directed towards them.
- the flow measuring device used in the context of the present invention particularly preferably comprises at least one measuring sensor exposed to the flow.
- this measuring sensor is particularly preferably mounted on the support structure for the measuring capsule, that is, in particular, a printed circuit board carrying the measuring sensor. It is particularly advantageous if the measuring sensor protrudes into an annular space provided between the measuring capsule and the housing.
- the flow measuring device comprises two sensors, namely a heated measuring sensor and a reference sensor.
- the measuring accuracy of the flow measuring device is particularly useful when the measuring sensor and the reference sensor are arranged substantially symmetrically to the inflow connection piece.
- the measuring sensor By a clever arrangement of the measuring sensor (and, if necessary, the reference sensor) can be achieved that different Connection variants (see above) of the smoke detector without any influence on the detectable by means of the flow meter flow through the smoke detector have. In this sense, it proves to be particularly advantageous if the measuring sensor is arranged within an angular range of 105 ° and 145 ° to the inflow connection piece. In this respect, an angle range of 115 ° to 135 ° is particularly favorable. Optimal conditions are in an arrangement of the measuring sensor within an angular range of 124 ° and 128 ° to the inflow connection piece before.
- the smoke detector shown and shown in the drawing for placement in a bypass connected to a flow line comprises a two-piece housing 3 assembled from a flat base 1 and a substantially bell-shaped, cut-off cap 2.
- Base 1 and cap 2 are by means of five Screws 4 connected together.
- a printed circuit board having printed circuit board 6 is attached.
- a plug. 8 arranged, whose contacts are contacted with the printed circuit of the printed circuit board and on which - for connecting the smoke detector to the other components of the monitoring and reporting system - a mating connector is connected.
- the printed circuit board 6 is a support structure 9 for a mounted on its measuring capsule 10, which is equipped in a known manner with a smoke detector and connected to the printed circuit and further protrudes from the circuit board in the interior of the cap 2 of the housing 3 inside.
- an inflow connection piece 11 and an outflow connection piece 12 are arranged.
- the inner diameter and the outer diameter of the two connecting pieces 11 and 12 are dimensioned so that either a connection by means of a - réelleschiebenden to the respective connecting piece - usual connection hose (with a typical inner diameter of 20.7 mm) as well as by means of - in the respective Inserting connecting piece - usual connecting pipe (with a typical inner diameter of 13.0 mm) can be realized.
- the two connecting pieces 11 and 12 are mutually parallel axes in a common plane which is perpendicular to the plane defined by the circuit board 6 level.
- the inflow connection piece 11 is arranged offset in the sense to the measuring capsule 10 that its axis 13 does not hit the measuring capsule 10, but rather passes it. He walks steadily and without Diameter change in a projecting into the interior of the housing 3 tubular extension 14, whose axial length L is about 1.7 times the value of the inner diameter D of the inflow connection piece 11.
- the mouth 15 of the extension 14 is directed to a curved portion 16 of the cap 2, which forms a deflecting element 17 effecting a flow deflection in the direction of the measuring capsule 10.
- the radius of curvature of the curved portion 16 of the cap 2 is about 2 times the value of the inner diameter D of the inflow connection piece 11.
- the projecting into the housing interior extension 14 of the inflow connection piece 11 is in an open towards the measuring capsule 10 channel-shaped guide 18 over.
- the curved portion 16 of the cap 2 of the housing thereby extends a little way into the channel-shaped guide 18, so that the flow deflection is specifically introduced already in the region of the guide 18.
- the smoke detector is equipped with a flow measuring device, which monitors the flow through the smoke detector with a sample stream.
- the flow measuring device comprises two flow-exposed sensors connected to an evaluation circuit accommodated on the printed circuit board 6, namely a heated measuring sensor 19 and a reference sensor 20. Both sensors 19 and 20 are mounted on the printed circuit board 6 and protrude far enough from them protrude into an existing between the measuring capsule 10 and the cap 2 of the housing 3 annular space 21.
- the arrangement of the measuring sensor 19 and the reference sensor 20 is substantially symmetrical to that through the inflow connection piece 11 and the outflow connection piece 12 extending plane 22, in such a way that both sensors 19 and 20 are offset by an angle ⁇ of about 126 ° to the two connecting pieces.
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Abstract
Description
Die vorliegende Erfindung betrifft einen Rauchmelder zur Anordnung in einem an eine Strömungsleitung angeschlossenen Bypass, umfassend ein Gehäuse, welches einen Zuström-Anschlußstutzen und einen Abström-Anschlußstutzen aufweist, eine innerhalb des Gehäuses angeordnete Meßkapsel, welche auf einer Tragstruktur angebracht und mit einer Rauchmeßeinrichtung ausgestattet ist.The present invention relates to a smoke detector for arrangement in a bypass connected to a flow line, comprising a housing which has an inflow connection piece and an outflow connection piece, a measuring capsule arranged inside the housing, which is mounted on a support structure and equipped with a smoke measuring device ,
Aus dem Stand der Technik sind diverse Rauchmelder bekannt, die innerhalb von Gebäuden in dem jeweils auf eine Rauchentwicklung hin zu überwachenden Raum - im allgemeinen an der Decke - anzubringen sind. Im Hinblick auf typische Bauweisen solcher Rauchmelder wird beispielsweise verwiesen auf die
Ebenfalls zur Anordnung in dem zu überwachenden Raum, nämlich innerhalb einer Heizungs-/Lüftungs-/Klima-Leitung im Belüftungs- und/oder Abluftsystem eines Gebäudes ist der Rauchmelder gemäß der
Für andere Anwendungen sind Rauchmelder vorgeschlagen worden, die nicht in dem zu überwachenden Raum angeordnet werden, sondern vielmehr außerhalb hiervon, wobei es sich bei dem zu überwachenden Raum ggfs. auch um einen Strömungskanal handeln kann, in dem ein gasförmiges Medium strömt, das auf die Anwesenheit von Rauchindikatoren hin zu überwachen ist. Dem zu überwachenden Raum wird dabei ein Probenstrom entzogen, der das Gehäuse des Rauchmelders durchströmt und anschließend entweder in die Umgebung des Rauchmelders ausgestoßen oder in den zu überwachenden Raum zurückgeleitet wird. Solche Rauchmelder sind beispielsweise aus der
Die vorliegende Erfindung ist auf solche Rauchmelder gerichtet, die in einem an eine Strömungsleitung angeschlossenen Bypass angeordnet sind, um - durch Überwachung des den Bypass durchströmenden Prüfgas-Teilstromes im Hinblick auf Rauchindikatoren - die Anwesenheit von Rauch und/oder sonstigen Brandindikatoren in dem die Strömungsleitung durchströmenden Gas zu überwachen. Ein typischer Anwendungsbereich derartiger, zur Anordnung in einen an eine Strömungsleitung angeschlossenen Bypass bestimmter Rauchmelder ist die Luftfahrt; insbesondere werden in Lüftungssysteme zur Kabinenbelüftung von Passagierflugzeugen derartige Rauchmelder integriert. Entsprechendes gilt für die - im allgemeinen der Kühlung der dort betriebenen Geräte dienende - Belüftung von Technikräumen wie beispielsweise EDV-Räumen.The present invention is directed to such smoke detectors, which are arranged in a bypass connected to a flow line to - by monitoring the bypass flowing test gas partial stream with respect to smoke indicators - the presence of smoke and / or other fire indicators in the flow line flowing through Monitor gas. A typical area of application of such a bypass for certain smoke detectors connected to a flow line is aviation; In particular, such smoke detectors are integrated in ventilation systems for cabin ventilation of passenger aircraft. The same applies to the - generally cooling the equipment operated there - ventilation of technical rooms such as computer rooms.
Das Gehäuse eines solchen zur Anordnung in einem an eine Strömungsleitung angeschlossenen Bypass bestimmten Rauchmelders weist regelmäßig einen Zuström-Anschlußstutzen und einen Abström-Anschlußstutzen auf, an welche Rohr- bzw. Schlauchleitungen anschließbar sind, welche in der den zu überwachenden Gastrom führenden Strömungsleitung münden. Ein entsprechender, durch offenkundige Vorbenutzung bekannt gewordener Rauchmelder zur Anordnung in einem an eine Strömungsleitung angeschlossenen Bypass weist ein im wesentlichen zylindrisches Gehäuse auf. Im wesentlichen in einer Axialebene ist eine mit der Auswerteelektronik bestückte Leiterplatte angeordnet, welche zugleich die Tragstruktur für die durchströmbare Meßkapsel bildet, wobei die Meßkapsel von der Leiterplatte in die mit den beiden Anschlußstutzen versehene Gehäusehälfte hineinragt.The housing of such a device intended for arrangement in a bypass connected to a flow line smoke detector regularly has an inflow connection piece and an outflow connecting piece, to which pipe or hose lines are connected, which open into the leading gas flow to be monitored flow line. A corresponding, known by public prior use smoke detector for arrangement in a bypass connected to a flow line has a substantially cylindrical housing. Essentially in an axial plane is one equipped with the evaluation Circuit board arranged, which at the same time forms the support structure for the flow-through measuring capsule, wherein the measuring capsule protrudes from the circuit board in the provided with the two connecting piece housing half.
In Anwendungen mit erhöhten sicherheitstechnischen Anforderungen wie beispielsweise im Luftfahrtbereich erweist sich der vorstehend erläuterte bekannte, zur Anordnung in einem an eine Strömungsleitung angeschlossenen Bypass bestimmte Rauchmelder als nicht mehr zeitgemäß; denn in Ermangelung einer Überwachung der Durchströmung des Rauchmelders mit dem auf Brandindikatoren hin zu überwachenden Probenstrom unterbleibt trotz einer kritischen Rauchbeladung des die Strömungsleitung durchströmenden Gases ein Alarm dann, wenn die Durchströmung des Bypasses, in welchem der Rauchmelder angeordnet ist, durch Schmutz, Hindernisse, geknickte Anschlußschläuche oder dergleichen herabgesetzt bzw. behindert wird oder ganz unterbleibt.In applications with increased safety requirements, such as in the aviation sector, the above-explained known, for the arrangement in a bypass connected to a flow line certain smoke detector proves to be no longer timely; because in the absence of monitoring the flow through the smoke detector with fire indicators to be monitored sample flow is omitted despite a critical smoke loading of the flow line gas flowing an alarm when the flow through the bypass, in which the smoke detector is located, by dirt, obstacles, kinked Connection hoses or the like is reduced or impeded or completely omitted.
Die vorliegende Erfindung zielt darauf ab, einen Rauchmelder zur Anordnung in einen an eine Strömungsleitung angeschlossenen Bypass bereitzustellen, der sich in besonderer Weise zum Einsatz auf dem Gebiet der Luftfahrt eignet, indem er bei besonders kompakten Außenabmessungen hohen Sicherheitstechnischen Anforderungen genügt, insbesondere indem sich die Durchströmung des Rauchmelders mit einem Probenstrom zuverlässig überwachen läßt. Eine besondere Zielsetzung der vorliegenden Erfindung besteht darüber hinaus darin, daß die Art des Anschlusses des Rauchmelders - typischerweise kommen in Luftfahrtanwendungen je nach den Gegebenheiten Schlauchanschlüsse mit Anschlußschläuchen mit einem Innendurchmesser von 20,7 mm oder aber Rohranschlüsse mit Anschlußrohren mit einem Innendurchmesser von ca. 13 mm zum Einsatz - ohne substantielle Auswirkungen auf das Ergebnis der Überwachung der Durchströmung des Rauchmelders bleibt.The present invention aims to provide a smoke detector for placement in a bypass connected to a flow line, which is particularly suitable for use in the field of aviation by satisfying high safety requirements with particularly compact external dimensions, in particular by the flow the smoke detector can be reliably monitored with a sample stream. A particular object of the present invention is also that the type of connection of the smoke detector - typically come in aerospace applications depending on the circumstances hose connections with connection hoses with an inner diameter of 20.7 mm or pipe connections with connecting pipes with an inner diameter of approx. 13 mm are used - without any substantial effect on the result of monitoring the flow through the smoke detector.
Diese Aufgabenstellung wird gemäß der vorliegenden Erfindung gelöst durch einen zur Anordnung in einem an eine Strömungsleitung angeschlossenen Bypass bestimmten und geeigneten Rauchmelder, umfassend ein Gehäuse, welches einen Zuström-Anschlußstutzen und einen Abström-Anschlußstutzen aufweist, eine innerhalb des Gehäuses angeordnete durchströmbare Meßkapsel, welche auf einer Tragstruktur angebracht und mit einer Rauchmeßeinrichtung ausgestattet ist, und eine ebenfalls innerhalb des Gehäuses angeordnete Strömungsmeßeinrichtung, wobei der Zuström-Anschlußstutzen zu der Meßkapsel versetzt angeordnet ist, indem seine Achse an der Meßkapsel vorbeiführt, und in eine in das Innere des Gehäuses hineinragende rohrförmige Verlängerung übergeht, und wobei ferner die Meßkapsel von der Tragstruktur in Richtung auf die Verlängerung des Zuström-Anschlußstutzens vorsteht, deren Mündung auf ein gewölbtes, eine Strömungsumlenkung in Richtung auf die Meßkapsel bewirkendes Umlenkelement gerichtet ist. Für den erfindungsgemäßen Rauchmelder ist, mit anderen Worten, eine bestimmte Ausgestaltung jener konstruktiven Merkmale charakteristisch, die eine besonders ausgeprägte Auswirkung auf die Durchströmungssituation des Rauchmelders haben, nämlich, in Kombination miteinander drei Merkmale: Der Eintrittsbereich für den Probenstrom ist dahingehend gestaltet, daß der Zuström-Anschlußstutzen in eine in das Innere des Gehäuses hineinragende rohrförmige Verlängerung übergeht. Weiterhin ist ein spezifischer Umlenkbereich vorgesehen, in welchem der die Mündung der rohrförmigen Verlängerung verlassende Probenstrom in Richtung auf die Meßkapsel umgelenkt wird. Dabei ist es schließlich bedeutsam, daß die Meßkapsel nicht in Verlängerung des Zuström-Anschlußstutzens, sondern vielmehr zu diesem versetzt angeordnet ist, so daß der Probenstrom eben erst nach der durch das Umlenkelement induzierten Umlenkung auf die Meßkapsel trifft. Der solchermaßen ausgeführte Rauchmelder zeichnet sich insbesondere dadurch aus, daß auch bei besonders geringen Außenabmessungen die Art des Anschlusses des Rauchmelders an die Strömungsleitung nur vergleichsweise geringe Auswirkungen auf die Durchströmung hat. Insbesondere läßt sich in Anwendung der vorliegenden Erfindung erreichen, daß die Art des Anschlusses des Rauchmelders an die Strömungsleitung (Rohr mit 13 mm Innendurchmesser bzw. Schlauch mit 20,7 mm Innendurchmesser), die sich bei einem gleichen Massenstrom der dem Rauchmelder zugeführten Probenströmung durch den Bypass in signifikant unterschiedlichen Strömungsgeschwindigkeiten der Probenströmung im Bereich des Zuström-Anschlußstutzens niederschlägt, nur unwesentliche, vernachlässigbare Auswirkungen auf das von der Strömungsmeßeinrichtung bereitgestellte Signal hat. Dies ist insoweit ein herausragendes, unerwartetes Ergebnis, als sich typischerweise eine entsprechende Beruhigung und Vergleichmäßigung der Strömung nur über vergleichsweise sehr große Einlaufstrecken erreichen läßt, was der Zielsetzung nach einer kompakten Bauweise des Rauchmelders widerspricht. Im Ergebnis stellt die vorliegende Erfindung somit einen zur Anordnung in einem an eine Strömungsleitung angeschlossenen Bypass geeigneten und bestimmten Rauchmelder bereit, der sich aufgrund seiner kompakten Bauweise wie auch die Erfüllung hoher sicherheitstechnischer Anforderungen in besonderer Weise zum Einsatz in der Luftfahrt eignet, wobei ergänzend hinzukommt, daß sich ein und derselbe Rauchmelder zur Verwendung bei unterschiedlichen Anschlußvarianten (s. oben) eignet. Insoweit bedarf es in Anwendung der vorliegenden Erfindung nicht der konstruktiven und/oder schaltungstechnischen Anpassung des jeweils verwendeten Rauchmelders an unterschiedliche Einbausituationen und dementsprechend unterschiedliche Anschlußvarianten.This object is achieved according to the present invention by a suitable for the arrangement in a bypass connected to a flow line and suitable smoke detectors, comprising a housing having an inlet connection piece and an outflow connecting piece, a disposed within the housing through-flow measuring capsule, which attached to a support structure and equipped with a smoke measuring device, and also disposed within the housing flow measuring device, wherein the inflow connection piece is arranged offset to the measuring capsule by its axis passing the measuring capsule, and in a projecting into the interior of the housing tubular extension wherein, furthermore, the measuring capsule protrudes from the supporting structure in the direction of the extension of the inflow connecting piece, the mouth of which leads to a curved, a flow deflection in the direction of the measuring capsule Direction is directed. For the smoke detector according to the invention is, in other words, a particular embodiment of those constructive features characteristic that have a particularly pronounced effect on the flow situation of the smoke detector, namely, in combination with each other three features: The inlet region for the sample stream is designed so that the inflow -Anschlussstutzen merges into a projecting into the interior of the housing tubular extension. Furthermore, a specific deflection area provided in which the outlet of the tubular extension leaving the sample stream in the direction of the measuring capsule. It is finally significant that the measuring capsule is not offset in the extension of the inflow connecting piece, but rather arranged offset to this, so that the sample stream just after the induced deflection by the deflector meets the measuring capsule. The thus executed smoke detector is characterized in particular by the fact that even with very small external dimensions, the type of connection of the smoke detector to the flow line has only a relatively small effect on the flow. In particular, can be achieved in application of the present invention that the type of connection of the smoke detector to the flow line (tube with 13 mm inner diameter or hose with 20.7 mm inner diameter), which at a same mass flow of the smoke detector supplied sample flow through the Bypass deposits in significantly different flow rates of the sample flow in the area of the inflow port, has only negligible, negligible effects on the signal provided by the flow meter. This is an outstanding, unexpected result insofar as typically a corresponding calming and equalization of the flow can only be achieved over comparatively very large inlet sections, which contradicts the objective of a compact design of the smoke detector. As a result, the present invention thus provides a suitable and specific for the arrangement in a connected to a flow line bypass smoke detector, which due to its compact design as well as the fulfillment of high safety Requirements in a special way for use in aviation, with the additional addition that one and the same smoke detector is suitable for use with different connection variants (see above). In that regard, it is not necessary in application of the present invention, the constructive and / or circuitry adjustment of the smoke detector used in each case to different installation situations and accordingly different connection variants.
Eine erste bevorzugte Weiterbildung des erfindungsgemä-βen Rauchmelders zeichnet sich dadurch aus, daß die axiale Länge der Verlängerung mindestens den 1,5fachen Wert des Innendurchmessers des Zuström-Anschlußstutzens beträgt. Dies wirkt sich in dem weiter oben bereits dargelegten Sinne günstig auf die von den Anschlußbedingungen weitestgehend unabhängige Durchströmungssituation durch den Rauchmelder und somit eine von der jeweiligen Einbausituation unabhängige Ermittlung der Durchströmung des Rauchmelders aus. Dasselbe gilt, wenn, gemäß einer anderen bevorzugten Weiterbildung, die in das Gehäuseinnere hineinragende Verlängerung des Zuström-Anschlußstutzens in eine zur Meßkapsel hin offene rinnenförmige Führung übergeht, wobei sich besonders bevorzugt das weiter oben bereits erläuterte Umlenkelement in die rinnenförmige Führung hinein erstreckt. Gerade im Hinblick auf eine günstige Durchströmungssituation bei besonders kompakten Rauchmeldern ist dies besonders vorteilhaft.A first preferred development of the invention-βen smoke detector is characterized in that the axial length of the extension is at least 1.5 times the value of the inner diameter of the inflow connection piece. This has a favorable effect in the sense already set forth above on the largely independent from the connection conditions flow-through situation by the smoke detector and thus independent of the respective installation situation determination of the flow of the smoke detector. The same applies if, according to another preferred development, the extension of the inflow connecting piece protruding into the housing interior merges into a channel-shaped guide which is open toward the measuring capsule, with the deflecting element already explained above particularly preferably extending into the channel-shaped guide. Especially with regard to a favorable flow situation in particularly compact smoke detectors, this is particularly advantageous.
Im Rahmen der vorliegenden Erfindung können der Zuström-Anschlußstutzen und dessen in das Gehäuseinnere hineinragende Verlängerung denselben Innendurchmesser aufweisen. Zwingend ist dies indessen nicht. Vielmehr ist im Einzelfall eine Realisierung der vorliegenden Erfindung, ohne daß dies nennenswerte nachteilige Auswirkungen auf die angestrebten Vorteile hätte, auch mit Rauchmeldern möglich, bei denen der Innendurchmesser der in das Gehäuseinnere hineinragenden Verlängerung des Zuström-Anschlußstutzens geringer ist als der Innendurchmesser des Zuström-Anschlußstutzens selbst.In the context of the present invention, the inflow connection piece and its extension projecting into the interior of the housing can have the same inner diameter. However, this is not mandatory. Much more is in an individual case, an implementation of the present invention, without this would have significant adverse effects on the desired benefits, even with smoke detectors possible in which the inner diameter of the projecting into the housing interior extension of the inflow connection piece is smaller than the inner diameter of the inflow connection piece itself ,
In baulicher Hinsicht ist es besonders günstig, wenn das Umlenkelement durch einen Abschnitt des Gehäuses gebildet ist. Hierdurch läßt sich, da ein gesondertes Umlenkelement weder herzustellen noch zu montieren ist, der Fertigungsaufwand für den erfindungsgemäßen Rauchmelder gering halten. Im Hinblick auf die Strömungsverhältnisse innerhalb des Rauchmelders ist es dabei besonders günstig, wenn der Krümmungsradius des Umlenkelements mindestens den 1,5 fachen Wert des Innendurchmessers des Zuström-Anschlußstutzens beträgt.In terms of construction, it is particularly advantageous if the deflection element is formed by a portion of the housing. As a result, since a separate deflection element is neither produce nor assemble, the manufacturing cost of the smoke detector according to the invention keep low. With regard to the flow conditions within the smoke detector, it is particularly advantageous if the radius of curvature of the deflecting element is at least 1.5 times the value of the inner diameter of the inflow connecting piece.
Sowohl im Hinblick auf die Durchströmungsverhältnisse als auch im Hinblick auf die Einbausituation erweist sich als vorteilhaft, wenn der Zuström-Anschlußstutzen und der Abström-Anschlußstutzen im wesentlichen in einer gemeinsamen Ebene liegen, besonders bevorzugt, indem die Achsen der beiden genannten Stutzen im wesentlichen zueinander parallel verlaufen. Den weiter oben bereits erläuterten besonderen Vorteilen des Rauchmelders im Hinblick auf dessen Durchströmung kommt dabei entgegen, wenn die Tragstruktur für die Meßkapsel, bei der es sich insbesondere um eine eine gedruckte Schaltung aufweisende Leiterplatte handeln kann, im wesentlichen senkrecht steht auf jener durch die Achsen der beiden Anschlußstutzen definierten Ebene, und zwar besonders bevorzugt parallel zu den Achsen der beiden Stutzen. In diesem Falle zeichnet sich ein besonders zweckmäßiges Gehäuse dadurch aus, daß es aus einer flachen Basis, an der eine Buchse für den elektrischen Anschluß des Rauchmelders an die übrigen Komponenten des Melde- und Überwachungssystems angeordnet ist, und eine im wesentlichen glockenförmige Kappe, an der die beiden Anschlußstutzen angeordnet sind, zusammengefügt ist. Die Meßkapsel kann dabei insbesondere so weit von der Tragstruktur in das Innere der Kappe des Gehäuses hineinragen, daß die Mündung des Abström-Anschlußstutzens auf sie gerichtet ist.Both with regard to the flow conditions as well as with regard to the installation situation, it proves to be advantageous if the inflow connection piece and the outflow connection piece lie substantially in a common plane, particularly preferably in that the axes of the two stubs are substantially parallel to one another run. The above-mentioned special advantages of the smoke detector with regard to its flow is counteracted when the support structure for the measuring capsule, which may be in particular a printed circuit board having a printed circuit, is substantially perpendicular to that through the axes of two connecting pieces defined plane, and more preferably parallel to the axes of the two Support. In this case, a particularly useful housing is characterized in that it consists of a flat base on which a socket for the electrical connection of the smoke detector to the other components of the reporting and monitoring system is arranged, and a substantially bell-shaped cap on the the two connecting pieces are arranged, joined together. The measuring capsule can protrude in particular so far from the support structure in the interior of the cap of the housing, that the mouth of the outflow connecting piece is directed towards them.
Die im Rahmen der vorliegenden Erfindung zur Anwendung kommende Strömungsmeßeinrichtung umfaßt besonders bevorzugt mindestens einen der Strömung ausgesetzten Meßsensor. Im Hinblick auf eine besonders einfache Montage des Rauchmelders ist dieser Meßsensor besonders bevorzugt auf der Tragstruktur für die Meßkapsel, das heißt insbesondere einer auf den Meßsensor tragenden Leiterplatte angebracht. Besonders günstig ist es dabei, wenn der Meßsensor in einen zwischen der Meßkapsel und dem Gehäuse vorgesehenen Ringraum hineinragt.The flow measuring device used in the context of the present invention particularly preferably comprises at least one measuring sensor exposed to the flow. With regard to a particularly simple installation of the smoke detector, this measuring sensor is particularly preferably mounted on the support structure for the measuring capsule, that is, in particular, a printed circuit board carrying the measuring sensor. It is particularly advantageous if the measuring sensor protrudes into an annular space provided between the measuring capsule and the housing.
Im Hinblick auf die mit der vorliegenden Erfindung erzielbaren Vorteile ist es dabei besonders günstig, wenn die Strömungsmeßeinrichtung zwei Sensoren umfaßt, nämlich einen beheizten Meßsensor und einen Referenzsensor. Der Meßgenauigkeit der Strömungsmeßeinrichtung ist dabei besonders dienlich, wenn der Meßsensor und der Referenzsensor im wesentlichen symmetrisch zu dem Zuström-Anschlußstutzen angeordnet sind.In view of the achievable with the present invention advantages, it is particularly advantageous if the flow measuring device comprises two sensors, namely a heated measuring sensor and a reference sensor. The measuring accuracy of the flow measuring device is particularly useful when the measuring sensor and the reference sensor are arranged substantially symmetrically to the inflow connection piece.
Durch eine geschickte Anordnung des Meßsensors (und ggfs. des Referenzsensors) läßt sich erreichen, daß unterschiedliche Anschlußvarianten (s. oben) des Rauchmelders ohne jeglichen Einfluß auf die mittels der Strömungsmeßeinrichtung ermittelbare Durchströmung des Rauchmelders haben. In diesem Sinne erweist es sich als besonders günstig, wenn der Meßsensor innerhalb eines Winkelbereichs von 105° und 145° zum Zuström-Anschlußstutzen angeordnet ist. Besonders günstig ist insoweit ein Winkelbereich von 115° bis 135°. Optimale Verhältnisse liegen bei einer Anordnung des Meßsensors innerhalb eines Winkelbereichs von 124° und 128° zum Zuström-Anschlußstutzen vor.By a clever arrangement of the measuring sensor (and, if necessary, the reference sensor) can be achieved that different Connection variants (see above) of the smoke detector without any influence on the detectable by means of the flow meter flow through the smoke detector have. In this sense, it proves to be particularly advantageous if the measuring sensor is arranged within an angular range of 105 ° and 145 ° to the inflow connection piece. In this respect, an angle range of 115 ° to 135 ° is particularly favorable. Optimal conditions are in an arrangement of the measuring sensor within an angular range of 124 ° and 128 ° to the inflow connection piece before.
Im folgenden wird die vorliegende Erfindung anhand eines in der Zeichnung veranschaulichten bevorzugten Ausführungsbeispiels erläutert. Dabei zeigt
- Fig. 1
- einen Rauchmelder nach der vorliegenden Erfindung in Seitenansicht bei teilweise aufgeschnittenem Gehäuse und
- Fig. 2
- einen Radialschnitt durch den in
Fig. 1 gezeigten Rauchmelder entlang der Linie II-II.
- Fig. 1
- a smoke detector according to the present invention in side view with partially cut housing and
- Fig. 2
- a radial section through the in
Fig. 1 shown smoke detectors along the line II-II.
Der in der Zeichnung gezeigte, zur Anordnung in einem an eine Strömungsleitung angeschlossenen Bypass bestimmte und ausgeführte Rauchmelder umfaßt ein zweiteiliges, aus einer flachen Basis 1 und einer im wesentlichen glockenförmigen, geschnitten dargestellten Kappe 2 zusammengefügtes Gehäuse 3. Basis 1 und Kappe 2 sind mittels fünf Schrauben 4 miteinander verbunden.The smoke detector shown and shown in the drawing for placement in a bypass connected to a flow line comprises a two-
An der Basis 1 ist, in die Kappe 2 hineinragend, eine mit elektronischen Bauteilen 5 bestückte, eine gedruckte Schaltung aufweisende Leiterplatte 6 angebracht. An der äußeren Stirnseite 7 der Basis 1 ist ein Stecker 8 angeordnet, dessen Kontakte mit der gedruckten Schaltung der Leiteplatte kontaktiert sind und an dem - zum Anschluß des Rauchmelders an die übrigen Komponenten des Überwachungs- und Meldesystems - ein Gegenstecker anschließbar ist.At the base 1, projecting into the
Die Leiterplatte 6 stellt eine Tragstruktur 9 für eine auf ihr angebrachte Meßkapsel 10 dar, die in bekannter Weise mit einer Rauchmeßeinrichtung ausgestattet und an die gedruckte Schaltung angeschlossen ist und von der Leiterplatte weiter in das Innere der Kappe 2 des Gehäuses 3 hinein vorsteht.The printed circuit board 6 is a support structure 9 for a mounted on its measuring
Für die Anordnung des Rauchmelders in einem an eine Strömungsleitung angeschlossenen Bypass sind an der Kappe 2 des Gehäuses 3 ein Zuström-Anschlußstutzen 11 und einen Abström-Anschlußstutzen 12 angeordnet. Der Innendruchmesser und der Außendurchmesser der beiden Anschlußstutzen 11 und 12 sind dabei so bemessen, daß wahlweise ein Anschluß mittels eines - auf den jeweiligen Anschlußstutzen aufzuschiebenden - üblichen Anschlußschlauches (mit einem typischen Innendurchmesser von 20,7 mm) wie auch mittels eines - in den jeweiligen Anschlußstutzen einzusteckenden - üblichen Anschlußrohres (mit einem typischen Innendurchmesser von 13,0 mm) realisierbar ist. Die beiden Anschlußstutzen 11 und 12 liegen mit zueinander parallelen Achsen in einer gemeinsamen Ebene, welche senkrecht steht auf der durch die Leiterplatte 6 definierten Ebene.For the arrangement of the smoke detector in a bypass connected to a flow line to the
Der Zuström-Anschlußstutzen 11 ist dabei in dem Sinne zu der Meßkapsel 10 versetzt angeordnet, daß seine Achse 13 nicht auf die Meßkapsel 10 trifft, sondern vielmehr an dieser vorbeiführt. Er geht stetig und ohne Durchmesseränderung in eine in das Innere des Gehäuses 3 hineinragende rohrförmige Verlängerung 14 über, deren axiale Länge L etwa den 1,7-fachen Wert des Innendurchmessers D des Zuström-Anschlußstutzens 11 beträgt. Die Mündung 15 der Verlängerung 14 ist auf einen gewölbten Abschnitt 16 der Kappe 2, welcher ein eine Strömungsumlenkung in Richtung auf die Meßkapsel 10 bewirkendes Umlenkelement 17 bildet, gerichtet. Der Krümmungsradius des gewölbten Abschnitts 16 der Kappe 2 beträgt etwa den 2-fachen Wert des Innendurchmessers D des Zuström-Anschlußstutzens 11. Die in das Gehäuseinnere hineinragende Verlängerung 14 des Zuström-Anschlußstutzens 11 geht in eine zur Meßkapsel 10 hin offene rinnenförmige Führung 18 über. Der gewölbte Abschnitt 16 der Kappe 2 des Gehäuses erstreckt sich dabei ein Stück weit in die rinnenförmige Führung 18 hinein, so daß die Strömungsumlenkung gezielt bereits im Bereich der Führung 18 eingeleitet wird.The
Der Rauchmelder ist mit einer Strömungsmeßeinrichtung ausgestattet, welche die Durchströmung des Rauchmelders mit einem Probenstrom überwacht. Die Strömungsmeßeinrichtung umfaßt zwei der Strömung ausgesetzte, an eine auf der Leiterplatte 6 untergebrachte Auswerteschaltung angeschlossene Sensoren, nämlich einen beheizten Meßsensor 19 und einen Referenzsensor 20. Beide Sensoren 19 und 20 sind auf der Leiterplatte 6 angebracht und stehen von dieser so weit vor, daß sie in einen zwischen der Meßkapsel 10 und der Kappe 2 des Gehäuses 3 bestehenden Ringraum 21 hineinragen.The smoke detector is equipped with a flow measuring device, which monitors the flow through the smoke detector with a sample stream. The flow measuring device comprises two flow-exposed sensors connected to an evaluation circuit accommodated on the printed circuit board 6, namely a
Die Anordnung des Meßsensors 19 und des Referenzsensors 20 ist dabei im wesentlichen symmetrisch zu der durch den Zuström-Anschlußstutzen 11 und den Abström-Anschlußstutzen 12 verlaufenden Ebene 22, und zwar dergestalt, daß beide Sensoren 19 und 20 jeweils um einen Winkel α von etwa 126° zu den beiden Anschlußstutzen versetzt sind.The arrangement of the measuring
Claims (15)
- A smoke alarm for arrangement in a bypass connected to flow line, the smoke alarm comprising a housing (3) which has an inflow connecting piece (11) and an outflow connecting piece (12), and a measuring capsule (10) which is disposed inside the housing, through which a flow can flow and which is attached to a carrying structure (9) and provided with a smoke measuring device, wherein the inflow connecting piece (11) is disposed offset with respect to the measuring capsule (10) in that its axis (13) extends past the measuring capsule,
characterized by the following features:- the inflow connecting piece (11) transitions into a tubular extension (14) protruding into the inside of the housing (3);- the measuring capsule (10) protrudes from the carrying structure (9) in the direction of the extension (14) of the inflow connecting piece (11);- the mouth (15) of the extension (14) of the inflow connecting piece (11) is directed at an arched deflection element (17) effecting a flow deflection in the direction of the measuring capsule;- inside the housing, a flow meter is disposed. - The smoke alarm according to claim 1,
characterized in
that the axial length (L) of the extension (14) is at least the 1.5-fold value of the inner diameter (D) of the inflow connecting piece (11). - The smoke alarm according to claim 1 or claim 2,
characterized in
that the inflow connecting piece (11) and the extension (14) have the same inner diameter (D) or that the inner diameter (D) of the inflow connecting piece (11) is larger than the one of the extension (14). - The smoke alarm according to any one of the claims 1 to 3,
characterized in
that the extension (14) transitions into a channel-shaped guide (18) which is open toward the measuring capsule (10), wherein the deflection element (17) preferably extends into the channel-shaped guide (18). - The smoke alarm according to any one of the claim 1 to 4,
characterized in
that the deflection element (17) is formed by a portion (16) of the housing (3). - The smoke alarm according to any one of the claims 1 to 5,
characterized in
that the curvature radius of the deflection element (17) is at least the 1.5-fold value of the inner diameter (D) of the inflow connecting piece (11). - The smoke alarm according to any one of the claims 1 to 6,
characterized in
that the inflow connecting piece (11) and the outflow connecting piece (12) lie substantially in a common plane (22), wherein the axes of the inflow connecting piece (11) and the outflow connecting piece (12) preferably run substantially parallel to one another. - The smoke alarm according to any one of the claims 1 to 7,
characterized in
that the carrying structure (9) for the measuring capsule (10) is formed by a circuit board (6) comprising a printed circuit. - The smoke alarm according to any one of the claims 1 to 8,
characterized in
that the flow meter comprises at least one measuring sensor (19) which is exposed to the flow. - The smoke alarm according to the claims 8 and 9,
characterized in
that the at least one measuring sensor (19) is attached to the carrying structure (9). - The smoke alarm according to claim 10,
characterized in
that the measuring (19) is disposed in an annular chamber (21) provided between the measuring capsule (10) and the housing (3). - The smoke alarm according to any one of the claims 9 to 11,
characterized in
that the flow meter comprises a heated measuring sensor (19) and a reference sensor (20). - The smoke alarm according to claim 12,
characterized in
that the measuring sensor (19) and the reference sensor (20) are disposed substantially symmetrically with respect to the inflow connecting piece (11). - The smoke alarm according to claim 9,
characterized in
that the at least one measuring sensor is disposed inside the measuring capsule (10). - The smoke alarm according to any one of the claims 9 to 14,
characterized in
that the measuring sensor (19) is disposed within an angular range of 105° and 145° to the inflow connecting piece (11), preferred within an angular range of 115° and 135° to the inflow connecting piece (11), particularly preferred within an angular range of 124° and 128° to the inflow connecting piece (11).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007013295A DE102007013295A1 (en) | 2007-03-16 | 2007-03-16 | smoke detector |
| PCT/EP2008/001350 WO2008113449A1 (en) | 2007-03-16 | 2008-02-21 | Smoke alarm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2002411A1 EP2002411A1 (en) | 2008-12-17 |
| EP2002411B1 true EP2002411B1 (en) | 2012-01-25 |
Family
ID=39561700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08707782A Not-in-force EP2002411B1 (en) | 2007-03-16 | 2008-02-21 | Smoke alarm |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2002411B1 (en) |
| DE (1) | DE102007013295A1 (en) |
| WO (1) | WO2008113449A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013207605A1 (en) * | 2013-04-25 | 2014-10-30 | safetec Brandes und Niehoff GmbH | Smoke detection unit, smoke detection system and smoke detector device |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1941853U (en) * | 1962-03-22 | 1966-07-07 | Hans Ziller | VULCANIZING PLATE, IN PARTICULAR FOR CONVEYOR BELTS. |
| DE2846310C3 (en) * | 1978-10-24 | 1982-01-28 | Preussag Ag Feuerschutz, 2060 Bad Oldesloe | Fire alarm device for a room of great height and preferably large volume, in particular a warehouse or factory hall |
| AT378431B (en) * | 1983-06-30 | 1985-08-12 | Siemens Ag Oesterreich | SAMPLE CHAMBER OF CONVENTIONAL SIZE FOR INSTALLATION OF AN IONIZATION SMOKE DETECTOR INSERT |
| DE3331203A1 (en) * | 1983-08-30 | 1985-03-14 | Securiton AG, Zollikofen, Bern | Device for monitoring the velocity of a gas flow in a duct |
| US4758827A (en) * | 1986-07-28 | 1988-07-19 | Adt, Inc. | Duct smoke detector |
| FR2670010B1 (en) * | 1990-12-03 | 1994-05-06 | Cerberus Guinard | FUME DETECTION DEVICE BY SUCTION SYSTEM. |
| CH683464A5 (en) | 1991-09-06 | 1994-03-15 | Cerberus Ag | Optical smoke detector with active surveillance. |
| GB9315779D0 (en) | 1993-07-30 | 1993-09-15 | Stoneplan Limited | Apparatus and methods |
| DE29518042U1 (en) * | 1995-11-14 | 1996-01-25 | Wagner Alarm Sicherung | Fire detector |
| DE19605637C1 (en) | 1996-02-15 | 1997-05-07 | Wagner Alarm Sicherung | Air current monitoring in fire alarm using two flow sensors |
| JPH1123458A (en) | 1997-05-08 | 1999-01-29 | Nittan Co Ltd | Smoke sensor and monitoring control system |
| DE19902319B4 (en) | 1999-01-21 | 2011-06-30 | Novar GmbH, Albstadt-Ebingen Zweigniederlassung Neuss, 41469 | Scattered light fire detectors |
| CA2299919A1 (en) * | 1999-03-04 | 2000-09-04 | George A. Schoenfelder | Duct detector |
| EP1087352A1 (en) | 1999-09-22 | 2001-03-28 | Siemens Building Technologies AG | Optical smoke detector |
| DE19955362B4 (en) * | 1999-11-17 | 2004-07-08 | Wagner Alarm- Und Sicherungssysteme Gmbh | Scattered light detector |
| DE10066246A1 (en) | 2000-09-22 | 2005-10-06 | Robert Bosch Gmbh | Scattered light smoke |
| PT1376505E (en) | 2002-06-20 | 2006-06-30 | Siemens Schweiz Ag | FIRE ALARM |
| DE10246756B4 (en) | 2002-10-07 | 2006-03-16 | Novar Gmbh | Fire detection procedure and fire detector for its implementation |
| US7129847B2 (en) | 2003-08-06 | 2006-10-31 | Edwards Systems Technology, Inc. | Detector with dust filter and airflow monitor |
-
2007
- 2007-03-16 DE DE102007013295A patent/DE102007013295A1/en not_active Withdrawn
-
2008
- 2008-02-21 EP EP08707782A patent/EP2002411B1/en not_active Not-in-force
- 2008-02-21 WO PCT/EP2008/001350 patent/WO2008113449A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| EP2002411A1 (en) | 2008-12-17 |
| DE102007013295A1 (en) | 2008-09-18 |
| WO2008113449A1 (en) | 2008-09-25 |
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