EP3373264B1 - Channel smoke detector - Google Patents
Channel smoke detector Download PDFInfo
- Publication number
- EP3373264B1 EP3373264B1 EP18160566.8A EP18160566A EP3373264B1 EP 3373264 B1 EP3373264 B1 EP 3373264B1 EP 18160566 A EP18160566 A EP 18160566A EP 3373264 B1 EP3373264 B1 EP 3373264B1
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- European Patent Office
- Prior art keywords
- flow
- smoke detector
- channel
- mounting base
- chamber
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- 239000000779 smoke Substances 0.000 title claims description 77
- 238000001514 detection method Methods 0.000 claims description 23
- 238000011156 evaluation Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 206010010774 Constipation Diseases 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the invention relates to a duct smoke detector with a mounted on a wall of a flow channel mounting base and a held outside the flow channel on the mounting base smoke detector having a detection chamber, via an opening of the mounting base and an opening in the wall of the flow channel with the interior of the flow channel communicates, wherein the smoke detector is housed in a flow insert, which adjoins the mounting base and forms a flow chamber which communicates on the one hand with the detection chamber and on the other hand via a dirt filter with the opening of the mounting base, wherein the dirt filter is a filter insert which fits into a shaft the mounting base is inserted, and the duct smoke detector has a housing which is detachably connected to the mounting base.
- a duct smoke detector of this type is out GB 2 347 541 A known.
- Such duct smoke detectors are arranged on ventilation ducts and similar flow channels and serve for early fire detection by detecting smoke contained in the flowing through the flow channel medium.
- a duct smoke detector is connected to a building management system or fire alarm panel for signaling or alarm or combined with a smoke protection or fire damper, which automatically blocks the flow channel when triggered.
- the smoke detector is located outside the flow channel, it remains accessible from the outside, and testing, cleaning or maintenance is facilitated.
- the object of the invention is to provide a duct smoke detector with extended life of the smoke detector.
- the dirt filter is permeable to the smoke, but retains coarser dust and dirt particles, so that the interior of the detection chamber is better protected against contamination. Since the dirt filter is disposed between the flow chamber and the mounting base, it does not need to be fitted in the inlet or inlets of the detection chamber of the smoke detector and therefore may have a relatively large cross section, so that a sufficient amount of smoke enters the detection chamber. It also allows the use of commercially available smoke detectors and a simple assembly of the duct smoke detector.
- the dirt filter is formed by a detachable and thus exchangeable filter cartridge, which is held between the mounting base and the flow insert. For maintenance, therefore, only the flow insert needs to be dismantled, and then simply replace the filter insert.
- the housing of the duct smoke detector together with the flow insert, engages the smoke detector and holds it in position.
- the housing is releasably connectable to the mounting base so that both the smoke detector and the flow insert and the filter cartridge can be held between the housing and the mounting base.
- the duct smoke detector has a baffle projecting through the openings of the mounting base and the wall of the flow channel into the interior of the flow channel for deflecting a portion of a medium flowing in the flow channel to the smoke detector.
- the baffle ensures that the smoke does not simply flow past the opening in the channel wall, but a portion of the smoke-containing medium is deflected so that it passes through the opening of the mounting base and the dirt filter into the detection chamber, so that the smoke detected can be.
- the flow chamber contains a flow sensor with which it is possible to monitor whether the flow chamber is still sufficiently permeated by the medium. If, after prolonged use of the duct smoke detector, the dirt filter has clogged, the flow detected by the flow sensor drops below a critical value and a signal is automatically generated indicating a required maintenance of the duct smoke detector.
- the single drawing figure shows an axial section through a duct smoke detector according to the invention.
- the duct smoke detector 10 is externally mounted on a wall 12 of a flow channel 14, which is shown in the drawing in an axial partial section.
- a wall 12 of a flow channel 14 which is shown in the drawing in an axial partial section.
- an opening 16 is formed, which is covered on the outside by a mounting base 18 of the duct smoke detector 10.
- the mounting base 18 is secured to the wall 12 in any known manner, with a seal 20 preventing the medium flowing in the flow channel 14 from entering the environment or, vice versa, allowing ambient air to enter the flow channel.
- the type of mounting is e.g. depending on whether the wall 12 is a flat wall of a flow channel with a rectangular cross section or a curved wall of a flow channel with a round cross section.
- a bluff body 22 is formed, which projects through the opening 16 into the interior of the flow channel 14.
- the bluff body is formed by two crossed walls that intersect on the central axis of the opening 16.
- the mounting base 18 in turn forms an opening 24 which is concentric with the opening 16. However, the cross-section of this opening 24 is completely filled by a dirt filter 26.
- the dirt filter 26 is formed as a filter insert which is loosely inserted into the shaft of the mounting base 18 and between a flange 30 of the mounting base and the lower edge of the flow insert 28 is positively held and preferably free of play.
- the flow insert 28 has inside two crossed walls 32, which are oriented in the example shown so that they are aligned with the crossed walls of the bluff body 22.
- the cross-sectional area of the dirt filter 26 is thus divided by the walls of the bluff body and the walls of the flow insert into four quarter-circle sectors.
- the walls 32 of the flow insert 28 are excluded at the upper end and thus form a receiving space into which a commercial smoke detector 34 is suitably inserted.
- the smoke detector forms a detection chamber 36, which in the example shown has a funnel-shaped upper part, which is followed by a cylindrical section and finally a downwardly convex dome.
- windows 38 are formed, via which the detection chamber 36 communicates with a flow chamber 40, which is formed by the interior of the flow insert 28.
- an optoelectronic sensor device is also arranged in a known manner, with which, for example, smoke present in the detection chamber 36 can be detected.
- a circuit board 44 with evaluation electronics is arranged in a chamber 42 which is sealed in a gas-tight manner relative to the flow chamber 40, with which the signals of the sensor device are evaluated.
- the chamber 42 is formed in a housing 46 which also engages over the upper part of the mounting base 18 and bears against the outer surface of the mounting base 18 with a slightly conical inner surface.
- the housing 46 is releasably secured to the mounting base 18, for example, by means of a clamp strap closure, not shown, whereby all components of the duct smoke detector 10, so not only the mounting base 18 and the Housing 46, but also the transmitter, the smoke detector 34, the flow insert 28 and the dirt filter 26 are held together firmly.
- the board 44 of the transmitter is held on a partition wall 48, which closes the chamber 42 tight.
- a support plate 50 is held for the smoke detector 34.
- the smoke detector 34 is detachably connected to the carrier board 50 via resilient pin contacts 52, and the carrier board 50 is in turn connected via a gas-tight via 54 to the board 44 in the chamber 42.
- the plug contacts 52 pass through openings of a bottom plate 56 which is inserted or glued into the housing 46.
- the flow channel 14 is flowed through by a medium, for example by air, as indicated in the drawing by arrows, a portion of this flow is deflected by the bluff body 22 so that it meets the dirt filter 26 and through it into the flow chamber 40 enters.
- the medium can only leave the upstream part of the flow chamber 40 by entering through the windows 38 into the detection chamber 36 and then back into the downstream side Flow chamber 40 exits, from which the medium then, after it has passed through the dirt filter 26 again, enters the interior of the flow channel 14. In this way it is ensured that, if the air in the flow channel is loaded with smoke, this smoke in the detection chamber arrives and can be detected safely.
- the symmetrical arrangement shown here of the walls 32 and the walls of the bluff body 22 and the centering of the smoke detector 34 have the advantage that the smoke detector is largely independent of direction and thus in any orientation (with respect to rotations about its longitudinal axis) in the opening 16 in the wall of the flow channel can be used without its function is impaired.
- a sieve is inserted into the windows 38, which is intended to prevent the penetration of dirt into the detection chamber 36.
- the dirt filter 26 may be finer or more finely meshed than the sieves in the windows 38.
- the dirt filter 26 has the same mesh size as the sieves, there is the advantage that the soiling of the sieves is prevented or delayed.
- the dirt filter can seal faster than the sieves, but the filter can be replaced much easier in constipation, while replacement of the sieves is impossible in practice, so that the smoke detector would have to be replaced as a whole.
- a flow sensor 60 is arranged, the electronic signal is also evaluated by the transmitter. In this way it can be constantly monitored whether the medium still sufficiently flows through the flow chamber 40, which then allows the conclusion that the detection chamber 36 of the smoke detector is still sufficiently flowed through. If, after prolonged use, the dirt filter 26 becomes gradually clogged and therefore the flow in the flow chamber 40 and the detection chamber 36 decreases, this is indicated by the flow sensor 60, so that the dirt filter 26 can be cleaned or replaced in a timely manner.
- a differential pressure sensor can be used which measures a pressure difference between the upstream and downstream sectors of the flow chamber 40 and thus indirectly monitors flow in the detection chamber 36. Furthermore, as schematically shown in the drawing, a differential pressure sensor 62 may be provided to detect the pressure drop across the dirt filter so that in conjunction with the signal from the flow sensor 60, data on both the dirty state of the mud filter and the flow in the Let flow channel win.
- the dirt filter 26 provides the flow yet another advantage, it is evened so that it can be detected by the flow sensor 60 easier and more accurate.
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- Chemical & Material Sciences (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire-Detection Mechanisms (AREA)
Description
Die Erfindung betrifft einen Kanalrauchmelder mit einem an einer Wand eines Strömungskanals zu befestigenden Montagesockel und einem außerhalb des Strömungskanals auf dem Montagesockel gehaltenen Rauchdetektor, der eine Detektionskammer aufweist, die über eine Öffnung des Montagesockels und eine Öffnung in der Wand des Strömungskanals mit dem Inneren des Strömungskanals kommuniziert, wobei der Rauchdetektor in einem Strömungseinsatz aufgenommen ist, der an den Montagesockel anschließt und eine Strömungskammer bildet, die einerseits mit der Detektionskammer und andererseits über einen Schmutzfilter mit der Öffnung des Montagesockels kommuniziert, wobei der Schmutzfilter ein Filtereinsatz ist, der passend in einen Schacht des Montagesockels eingesetzt ist, und der Kanalrauchmelder ein Gehäuse aufweist, das lösbar mit dem Montagesockel verbunden ist.The invention relates to a duct smoke detector with a mounted on a wall of a flow channel mounting base and a held outside the flow channel on the mounting base smoke detector having a detection chamber, via an opening of the mounting base and an opening in the wall of the flow channel with the interior of the flow channel communicates, wherein the smoke detector is housed in a flow insert, which adjoins the mounting base and forms a flow chamber which communicates on the one hand with the detection chamber and on the other hand via a dirt filter with the opening of the mounting base, wherein the dirt filter is a filter insert which fits into a shaft the mounting base is inserted, and the duct smoke detector has a housing which is detachably connected to the mounting base.
Ein Kanalrauchmelder dieser Art ist aus
Solche Kanalrauchmelder sind an Lüftungskanälen und ähnlichen Strömungskanälen angeordnet und dienen zu einer frühzeitigen Branderkennung, indem sie Rauch detektieren, der in dem durch den Strömungskanal strömenden Medium enthalten ist. Häufig ist ein solcher Kanalrauchmelder mit einer Gebäudeleittechnik oder Brandmeldezentrale zur Signal- oder Alarmgebung verbunden oder mit einer Rauchschutz- oder Brandschutzklappe kombiniert, die im Auslösefall automatisch den Strömungskanal sperrt.Such duct smoke detectors are arranged on ventilation ducts and similar flow channels and serve for early fire detection by detecting smoke contained in the flowing through the flow channel medium. Frequently, such a duct smoke detector is connected to a building management system or fire alarm panel for signaling or alarm or combined with a smoke protection or fire damper, which automatically blocks the flow channel when triggered.
Dadurch, dass der Rauchmelder außerhalb des Strömungskanals angeordnet ist, bleibt er von außen zugängig, und Prüf-, Reinigungs- oder Wartungsarbeiten werden erleichtert.The fact that the smoke detector is located outside the flow channel, it remains accessible from the outside, and testing, cleaning or maintenance is facilitated.
Bei längerem Gebrauch des Rauchmelders kann sich jedoch Staub oder Schmutz in der Detektionskammer des Rauchdetektors und an einer darin enthaltenen Sensoroptik niederschlagen, so dass die Optik allmählich erblindet und keine sichere Raucherkennung mehr möglich ist. Aus diesem Grund ist eine regelmäßige Wartung des Rauchmelders, insbesondere eine Überprüfung und ggf. ein Austausch des Rauchdetektors erforderlich.With prolonged use of the smoke detector, however, dust or dirt may precipitate in the detection chamber of the smoke detector and a sensor optics contained therein, so that the optics gradually blinded and no reliable smoke detection is possible. For this reason, a regular maintenance of the smoke detector, in particular a review and possibly an exchange of the smoke detector is required.
Aufgabe der Erfindung ist es, einen Kanalrauchmelder mit verlängerter Standzeit des Rauchdetektors zu schaffen.The object of the invention is to provide a duct smoke detector with extended life of the smoke detector.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst dass Strömungseinsatz passend in den Schacht des Montagesockels eingesetzt ist, der Schmutzfilter lösbar zwischen dem Montagesockel und dem Strömungseinsatz gehalten ist, der Rauchdetektor lösbar in das Gehäuse eingesetzt ist, und das Gehäuse den Schmutzfilter, den Strömungseinsatz und den Rauchdetektor zusammenhält.This object is achieved in that flow insert is suitably inserted into the shaft of the mounting base, the dirt filter is releasably held between the mounting base and the flow insert, the smoke detector is releasably inserted into the housing, and the housing holds the dirt filter, the flow insert and the smoke detector together ,
Der Schmutzfilter ist für den Rauch durchlässig, hält jedoch gröbere Staub- und Schmutzpartikel zurück, so dass das Innere der Detektionskammer besser gegen Verschmutzung geschützt wird. Da der Schmutzfilter zwischen der Strömungskammer und dem Montagesockel angeordnet ist, braucht er nicht in den Einlass oder die Einlässe der Detektionskammer des Rauchdetektors eingepasst zu werden und er kann deshalb einen relativ großen Querschnitt aufweisen, so dass eine ausreichende Menge an Rauch in die Detektionskammer gelangt. Außerdem wird so die Verwendung handelsüblicher Rauchdetektoren sowie ein einfacher Zusammenbau des Kanalrauchmelders ermöglicht.The dirt filter is permeable to the smoke, but retains coarser dust and dirt particles, so that the interior of the detection chamber is better protected against contamination. Since the dirt filter is disposed between the flow chamber and the mounting base, it does not need to be fitted in the inlet or inlets of the detection chamber of the smoke detector and therefore may have a relatively large cross section, so that a sufficient amount of smoke enters the detection chamber. It also allows the use of commercially available smoke detectors and a simple assembly of the duct smoke detector.
Der Schmutzfilter wird durch einen lösbaren und somit austauschbaren Filtereinsatz gebildet, der zwischen dem Montagesockel und dem Strömungseinsatz gehalten ist. Bei Wartungsarbeiten braucht deshalb nur der Strömungseinsatz demontiert zu werden, um dann den Filtereinsatz einfach auszuwechseln.The dirt filter is formed by a detachable and thus exchangeable filter cartridge, which is held between the mounting base and the flow insert. For maintenance, therefore, only the flow insert needs to be dismantled, and then simply replace the filter insert.
Das Gehäuse des Kanalrauchmelder schließt zusammen mit dem Strömungseinsatz den Rauchdetektor ein und hält ihn in Position. Das Gehäuse lösbar mit dem Montagesockel verbindbar, so dass sowohl der Rauchdetektor als auch der Strömungseinsatz und der Filtereinsatz zwischen dem Gehäuse und dem Montagesockel gehalten werden können.The housing of the duct smoke detector, together with the flow insert, engages the smoke detector and holds it in position. The housing is releasably connectable to the mounting base so that both the smoke detector and the flow insert and the filter cartridge can be held between the housing and the mounting base.
Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments and further developments of the invention are specified in the subclaims.
In einer vorteilhaften Ausführungsform weist der Kanalrauchmelder einen durch die Öffnungen des Montagesockels und der Wand des Strömungskanals in das Innere des Strömungskanals ragenden Staukörper zum Umlenken eines Anteils eines in dem Strömungskanal strömenden Mediums zu dem Rauchdetektor auf.In an advantageous embodiment, the duct smoke detector has a baffle projecting through the openings of the mounting base and the wall of the flow channel into the interior of the flow channel for deflecting a portion of a medium flowing in the flow channel to the smoke detector.
Durch den Staukörper wird sichergestellt, dass der Rauch nicht einfach an der Öffnung in der Kanalwand vorbeiströmt, sondern ein Anteil des rauchhaltigen Mediums so umgelenkt wird, dass es durch die Öffnung des Montagesockels und den Schmutzfilter hindurch in die Detektionskammer gelangt, so dass der Rauch detektiert werden kann.The baffle ensures that the smoke does not simply flow past the opening in the channel wall, but a portion of the smoke-containing medium is deflected so that it passes through the opening of the mounting base and the dirt filter into the detection chamber, so that the smoke detected can be.
In einer Ausführungsform enthält die Strömungskammer einen Strömungssensor, mit dem sich überwachen lässt, ob die Strömungskammer noch in ausreichendem Maße von dem Medium durchströmt wird. Wenn sich nach längerem Gebrauch des Kanalrauchmelders der Schmutzfilter zugesetzt hat, sinkt die von dem Strömungssensor erfasste Strömung unter einen kritischen Wert ab, und es wird automatisch ein Signal erzeugt, das eine erforderliche Wartung des Kanalrauchmelders anzeigt.In one embodiment, the flow chamber contains a flow sensor with which it is possible to monitor whether the flow chamber is still sufficiently permeated by the medium. If, after prolonged use of the duct smoke detector, the dirt filter has clogged, the flow detected by the flow sensor drops below a critical value and a signal is automatically generated indicating a required maintenance of the duct smoke detector.
Im folgenden wird ein Ausführungsbeispiel anhand der Zeichnung näher erläutert.
Die einzige Zeichnungsfigur zeigt einen axialen Schnitt durch einen erfindungsgemäßen Kanalrauchmelder.In the following an embodiment will be explained in more detail with reference to the drawing.
The single drawing figure shows an axial section through a duct smoke detector according to the invention.
Der Kanalrauchmelder 10 ist außenseitig an einer Wand 12 eines Strömungskanals 14 montiert, der in der Zeichnung in einem axialen Teilschnitt dargestellt ist. In der Wand 12 ist eine Öffnung 16 gebildet, die auf der Außenseite von einem Montagesockel 18 des Kanalrauchmelders 10 überdeckt ist. Der Montagesockel 18 ist auf irgendeine bekannte Weise an der Wand 12 befestigt, wobei eine Dichtung 20 verhindert, dass das in dem Strömungskanal 14 strömende Medium in die Umgebung gelangt oder umgekehrt Umgebungsluft in den Strömungskanal gelangt. Die Art der Montage ist z.B. davon abhängig, ob es sich bei der Wand 12 um eine ebene Wand eines Strömungskanals mit rechteckigen Querschnitt oder um eine gekrümmte Wand eines Strömungskanals mit rundem Querschnitt handelt.The
An dem Montagesockel 18 ist ein Staukörper 22 gebildet, der durch die Öffnung 16 hindurch in das Innere des Strömungskanals 14 ragt. Im gezeigten Beispiel wird der Staukörper durch zwei gekreuzte Wände gebildet, die sich auf der Mittelachse der Öffnung 16 kreuzen.On the
Der Montagesockel 18 bildet seinerseits eine Öffnung 24, die zu der Öffnung 16 konzentrisch ist. Allerdings ist der Querschnitt dieser Öffnung 24 vollständig von einem Schmutzfilter 26 ausgefüllt.The
Außerhalb des Strömungskanals 14 bildet der Montagesockel 18 einen zylindrischen oder leicht konischen Schacht, in den ein komplementär dazu geformter Strömungseinsatz 28 passend eingesetzt ist. An seinem äußeren, in der Zeichnung oberen Ende stützt sich der Strömungseinsatz 28 mit einem Flansch auf den Rand des Montagesockels 18 ab. Der Schmutzfilter 26 ist als Filtereinsatz ausgebildet, der lose in den Schacht des Montagesockels 18 eingelegt ist und zwischen einem Flansch 30 des Montagesockels und dem unteren Rand des Strömungseinsatzes 28 formschlüssig und vorzugsweise spielfrei gehalten ist.Outside the
Der Strömungseinsatz 28 weist im Inneren zwei gekreuzte Wände 32 auf, die im gezeigten Beispiel so orientiert sind, dass sie mit den gekreuzten Wänden des Staukörpers 22 fluchten. Die Querschnittsfläche des Schmutzfilters 26 wird auf diese Weise durch die Wände des Staukörpers und die Wände des Strömungseinsatzes in vier Viertelkreis-Sektoren aufgeteilt.The
Die Wände 32 des Strömungseinsatzes 28 sind am oberen Ende ausgenommen und bilden so einen Aufnahmeraum, in den ein handelsüblicher Rauchdetektor 34 passend eingesetzt ist. Der Rauchdetektor bildet eine Detektionskammer 36, die im gezeigten Beispiel einen trichterförmigen oberen Teil aufweist, an den sich nach unten ein zylindrischer Abschnitt und schließlich eine nach unten konvexe Kuppel anschließen. In dem zylindrischen Teil sind Fenster 38 gebildet, über welche die Detektionskammer 36 mit einer Strömungskammer 40 kommuniziert, die durch das Innere des Strömungseinsatzes 28 gebildet wird.The
In der Detektionskammer 36 ist außerdem in bekannter Weise eine optoelektronische Sensoreinrichtung angeordnet, mit der etwa in der Detektionskammer 36 vorhandener Rauch detektiert werden kann. Oberhalb des Rauchdetektors 34 ist in einer gegenüber der Strömungskammer 40 gasdicht abgeschlossenen Kammer 42 eine Platine 44 mit einer Auswerteelektronik angeordnet, mit der die Signale der Sensoreinrichtung ausgewertet werden.In the
Die Kammer 42 ist in einem Gehäuse 46 gebildet, das auch den oberen Teil des Montagesockels 18 übergreift und mit einer leicht konischen Innenfläche an der Außenfläche des Montagesockels 18 anliegt. Das Gehäuse 46 ist beispielsweise mit Hilfe eines nicht gezeigten Klemmbügelverschlusses lösbar an dem Montagesockel 18 gehalten, wodurch alle Bauteile des Kanalrauchmelders 10, also nicht nur der Montagesockel 18 und das Gehäuse 46, sondern auch die Auswerteelektronik, der Rauchdetektor 34, der Strömungseinsatz 28 und der Schmutzfilter 26 fest zusammengehalten werden.The
Wenn Reinigungs- oder Wartungsarbeiten erforderlich sind, kann man den Klemmbügelverschluss lösen und das Gehäuse 46 abnehmen, wonach sich dann nacheinander auch der Strömungseinsatz 28 und der Rauchdetektor 34, sowie schließlich der Schmutzfilter 26 entnehmen lassen. Über den offenen Schacht des Montagesockels 18 hat man dann zudem auch Zugang zu dem Staukörper 22, so dass dessen Oberflächen gereinigt werden können.If cleaning or maintenance is required, you can solve the clamp strap lock and remove the
Die Platine 44 der Auswerteelektronik ist an einer Trennwand 48 gehalten, die die Kammer 42 dicht abschließt. An der Unterseite dieser Trennwand ist eine Trägerplatine 50 für den Rauchdetektor 34 gehalten. Der Rauchdetektor 34 ist über federnde Stecckontakte 52 lösbar mit der Trägerplatine 50 verbunden, und die Trägerplatine 50 ist ihrerseits über eine gasdichte Durchkontaktierung 54 mit der Platine 44 in der Kammer 42 verbunden. Die Steckkontakte 52 durchgreifen Öffnungen einer Bodenplatte 56, die in das Gehäuse 46 eingelegt oder eingeklebt ist.The
Wenn der Strömungskanal 14 von einem Medium, beispielsweise von Luft durchströmt wird, wie in der Zeichnung durch Pfeile angedeutet wird, so wird ein Teil dieser Strömung durch den Staukörper 22 so umgelenkt, dass er auf den Schmutzfilter 26 trifft und durch diesen hindurch in die Strömungskammer 40 eintritt. Da die gekreuzten Wände 32 in der Strömungskammer 40 jedoch dicht an den Rauchdetektor 34 anschließen, kann das Medium den anströmseitigen Teil der Strömungskammer 40 nur dadurch wieder verlassen, dass es durch die Fenster 38 in die Detektionskammer 36 eintritt und dann auf der Abströmseite wieder in die Strömungskammer 40 austritt, von der aus das Medium dann, nachdem es den Schmutzfilter 26 nochmals durchquert hat, wieder in das Innere des Strömungskanals 14 gelangt. Auf diese Weise ist sichergestellt, dass, falls die Luft in dem Strömungskanal mit Rauch beladen ist, dieser Rauch in die Detektionskammer gelangt und sicher detektiert werden kann. Die hier gezeigte symmetrische Anordnung der Wände 32 und der Wände das Staukörpers 22 sowie die dazu zentrierte Platzierung des Rauchdetektors 34 haben den Vorteil, dass der Rauchmelder weitgehend richtungsunabhängig arbeitet und somit in jeder beliebigen Orientierung (bezüglich Drehungen um seine Längachse) in die Öffnung 16 in der Wand des Strömungskanals eingesetzt werden kann, ohne dass seine Funktion beeinträchtigt wird.If the
Durch den Schmutzfilter 26 werden gröbere Staub- und Schmutzpartikel zurückgehalten, wodurch eine Verschmutzung und schließlich Erblindung des Rauchdetektors 34 verhindert oder zumindest deutlich verzögert wird.By the
Bei den handelsüblichen Rauchdetektoren ist in die Fenster 38 jeweils ein Sieb eingesetzt, das das Eindringen von Schmutz in die Detektionskammer 36 verhindern soll. Der Schmutzfilter 26 kann feinporiger oder feinmaschiger sein als die Siebe in den Fenstern 38. Doch selbst wenn der Schmutzfilter 26 die gleiche Maschenweite hat wie die Siebe, ergibt sich der Vorteil, das die Verschmutzung der Siebe verhindert oder verzögert wird. Zwar kann sich dann der Schmutzfilter schneller dichtsetzen als die Siebe, doch lässt sich der Schmutzfilter bei Verstopfung wesentlich einfacher auswechseln, während ein Austausch der Siebe in der Praxis unmöglich ist, so dass der Rauchdetektor als Ganzes ausgewechselt werden müsste.In the commercially available smoke detectors, in each case a sieve is inserted into the
Im gezeigten Beispiel weisen die gekreuzten Wände 32 des Strömungseinsatzes 28 dort, wo sie sich in der Mitte kreuzen, jeweils noch eine weitere kleine Ausnehmung 58 auf. Über diese Ausnehmungen 58 sind alle vier Sektoren der Strömungskammer 40 miteinander verbunden, so dass ein Bypass mit begrenztem Strömungsquerschnitt gebildet wird, über den ein kleiner Anteil des Mediums die Detektionskammer 36 umgehen kann. In diesem Bypass ist ein Strömungssensor 60 angeordnet, dessen elektronisches Signal ebenfalls von der Auswerteelektronik ausgewertet wird. Auf diese Weise kann ständig überwacht werden, ob das Medium noch in ausreichendem Maße durch die Strömungskammer 40 strömt, was dann den Schluss zulässt, dass auch die Detektionskammer 36 des Rauchdetektors noch ausreichend durchströmt wird. Falls sich nach längerem Gebrauch der Schmutzfilter 26 allmählich zusetzt und deshalb die Strömung in der Strömungskammer 40 und der Detektionskammer 36 abnimmt, so wird dies durch den Strömungssensor 60 angezeigt, so dass der Schmutzfilter 26 rechtzeitig gereinigt oder ausgewechselt werden kann.In the example shown, the
Als Strömungssensor kann auch ein Differenzdrucksensor verwendet werden, der eine Druckdifferenz zwischen den anströmseitigen und abströmseitigen Sektoren der Strömungskammer 40 misst und damit indirekt sie Strömung in der Detektionskammer 36 überwacht. Weiterhin kann, wie in der Zeichnung schematisch gezeigt ist, ein Differenzdrucksensor 62 dazu vorgesehen sein, den Druckabfall über dem Schmutzfilter zu detektieren, so dass sich in Verbindung mit dem Signal des Strömungssensors 60 Daten sowohl über den Verschmutzungszustand des Schmutzfilters als auch über den Durchfluss im Strömungskanal gewinnen lassen.As a flow sensor, a differential pressure sensor can be used which measures a pressure difference between the upstream and downstream sectors of the
Der Schmutzfilter 26 liefert für die Strömung noch einen weiteren Vorteil, so wird diese vergleichmäßigt, so dass sie von dem Strömungssensor 60 leichter und genauer erfasst werden kann.The
Claims (11)
- A channel smoke detector assembly comprising a mounting base (18) to be mounted on a wall (12) of a flow channel (14), and a smoke detector (34) mounted on the mounting base (18) outside of the flow channel (14), the smoke detector having a detection chamber (36) that communicates with the interior of the flow channel via an opening (24) of the mounting base and an opening (16) in the wall of the flow channel (14), the smoke detector (34) being accommodated in a flow insert (28) disposed adjacent to the mounting base (18) and forming a flow chamber (40) which is in fluid communication with the detection chamber (36) on the one hand and, via a dirt filter (26), with the opening of the mounting base on the other hand, the dirt filter (26) being a filter insert that is inserted in a well of the mounting base (18), the assembly further comprising a casing (46) that is detachably connected to the mounting base (18), characterized in that the flow insert (28) is fittingly inserted in the well of the mounting base (18), the dirt filter (26) is held removably between the mounting base (18) and the filter insert (28), the smoke detector (18) is removably inserted in the casing (46), and the dirt filter (26), the flow insert (28) and the smoke detector (34) are held together by the casing (46).
- The smoke detector assembly according to claim 1, comprising an obstruction body (22) projecting into the interior of the flow channel through the openings (24, 26) of the mounting base (18) and the wall (12) of the flow channel for deflecting a part of the medium flowing through the flow channel towards the smoke detector (34).
- The channel smoke detector assembly according to any of the preceding claims, wherein the flow insert (28) has internal walls (32) which deflect at least a part of the flow entering into the flow chamber (40) into the detection chamber (36).
- The channel smoke detector assembly according to claims 2 and 3, wherein the walls (32) of the flow insert (28) are flush with corresponding walls of the obstruction body (22).
- The channel smoke detector assembly according to claim 1, wherein the casing (46) forms a chamber (42) that is gas-tightly sealed against the smoke detector (34) and accommodates evaluation electronics for the smoke detector.
- The channel smoke detector assembly according to any of the preceding claims, wherein the smoke detector (34) is detachably held on a carrier board (50) that is mounted in the casing (46).
- The channel smoke detector assembly according to any of the preceding claims, wherein the smoke detector (34) is removably inserted in the flow insert (28).
- The channel smoke detector assembly according to any of the preceding claims, wherein a flow sensor (60) is arranged in the flow chamber (40) for monitoring the flow of the medium in the flow chamber.
- The channel smoke detector assembly according to the claims 3 and 8, wherein the flow detector (60) is arranged in a recess (58) of one of the internal walls (32) of the flow chamber (40).
- The channel smoke detector assembly according to claim 9, wherein the internal walls (32) of the flow chamber (40) cross each other and each have, in the crossing area, a recess (58) in which the flow sensor (60) is accommodated.
- The channel smoke detector assembly according to any of the preceding claims, comprising a differential pressure sensor (62) for measuring a pressure drop across the dirt filter (26).
Priority Applications (1)
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PL18160566T PL3373264T3 (en) | 2017-03-10 | 2018-03-07 | Channel smoke detector |
Applications Claiming Priority (1)
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DE202017101367.7U DE202017101367U1 (en) | 2017-03-10 | 2017-03-10 | duct smoke |
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EP3373264A1 EP3373264A1 (en) | 2018-09-12 |
EP3373264B1 true EP3373264B1 (en) | 2019-10-02 |
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EP18160566.8A Active EP3373264B1 (en) | 2017-03-10 | 2018-03-07 | Channel smoke detector |
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Country | Link |
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EP (1) | EP3373264B1 (en) |
DE (1) | DE202017101367U1 (en) |
ES (1) | ES2763154T3 (en) |
PL (1) | PL3373264T3 (en) |
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CN115762041B (en) * | 2022-11-18 | 2023-06-16 | 烟台淼盾物联技术有限公司 | Smoke detector for fire control |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4758827A (en) * | 1986-07-28 | 1988-07-19 | Adt, Inc. | Duct smoke detector |
CA2119194A1 (en) * | 1994-03-16 | 1995-09-17 | Robert W. Smith | Smoke detector system for furnace |
CA2299919A1 (en) * | 1999-03-04 | 2000-09-04 | George A. Schoenfelder | Duct detector |
DE20204388U1 (en) * | 2002-03-20 | 2002-08-01 | Gebrüder Trox, GmbH, 47506 Neukirchen-Vluyn | Device for detecting smoke |
DE202005012397U1 (en) * | 2005-08-06 | 2005-10-27 | Wildeboer, Werner | Ventilation duct smoke detector fits in recess with opening duct wall matching rounded contour of sensor plug fitting with crossed vanes |
KR20120037049A (en) * | 2010-10-11 | 2012-04-19 | 대우조선해양 주식회사 | Smoke detector for duct system of marine structure |
KR101125188B1 (en) * | 2011-09-08 | 2012-03-20 | 주식회사 엔케이 | Smoke detecting apparatus for fire extinguishment |
US8939013B2 (en) * | 2012-03-16 | 2015-01-27 | Tyco Fire & Security Gmbh | Duct detector with improved functional test capability |
AU2013101580A4 (en) * | 2013-12-03 | 2014-01-09 | Fantech Pty Ltd | Ventilation system |
DE202014100194U1 (en) * | 2014-01-17 | 2014-03-20 | Trox Gmbh | System for attaching a smoke detector head and / or in a at least one channel wall having ventilation duct of a ventilation system |
-
2017
- 2017-03-10 DE DE202017101367.7U patent/DE202017101367U1/en active Active
-
2018
- 2018-03-07 PL PL18160566T patent/PL3373264T3/en unknown
- 2018-03-07 ES ES18160566T patent/ES2763154T3/en active Active
- 2018-03-07 EP EP18160566.8A patent/EP3373264B1/en active Active
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Also Published As
Publication number | Publication date |
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ES2763154T3 (en) | 2020-05-27 |
EP3373264A1 (en) | 2018-09-12 |
PL3373264T3 (en) | 2020-04-30 |
DE202017101367U1 (en) | 2018-06-13 |
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