EP1542188B1 - Apparatus and process for detecting the formation of a fire - Google Patents

Apparatus and process for detecting the formation of a fire Download PDF

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Publication number
EP1542188B1
EP1542188B1 EP04028927A EP04028927A EP1542188B1 EP 1542188 B1 EP1542188 B1 EP 1542188B1 EP 04028927 A EP04028927 A EP 04028927A EP 04028927 A EP04028927 A EP 04028927A EP 1542188 B1 EP1542188 B1 EP 1542188B1
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Prior art keywords
opening
suction
rubber
intake
supply line
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EP04028927A
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German (de)
French (fr)
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EP1542188A1 (en
Inventor
Manfred Russwurm
Hauke Dipl.-Ing. Dittmer
Thomas Dipl.-Ing. Warnecke
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Minimax GmbH and Co KG
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Minimax GmbH and Co KG
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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
    • 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 invention relates to a device for detecting incipient fires according to the preamble of the first claim and a method for cleaning the device.
  • the invention is applicable everywhere where incipient fires in rooms or electronic devices are possible.
  • the device is furthermore applicable where explosion zones according to ATEX95 and 137 are present, for example in the dust-contaminated industry (wood and mill industry).
  • a detector for detecting a fire characteristic via a supply line which in the space to be monitored or is arranged on or in the device to be monitored and has a number of suction ports, continuously supplied to room air or device samples. If the detector detects a fire detection variable, an evaluation unit, which is electronically connected to it, outputs a signal according to predetermined criteria.
  • supply line does not only mean pipelines that are attached to a room protection and lead to an air outlet opening in the housing of the detector and suck the room or device cooling air through suction
  • the supply line can also be a suction hopper, a collecting hood or a T- represent shaped pipe hood, which is placed for example on the air outlet grille of an electronic device and thereby arranged in the main cooling stream of the device.
  • Fire detection variables are understood to mean physical quantities which are subject to measurable changes in the environment of an incipient fire, for example the ambient temperature, the solid or liquid or gas component in the ambient air or the ambient radiation.
  • a method and a device for detecting incipient fires in rooms or in electronic devices are known with a detector for detecting a fire characteristic with at least one supply line in the space to be monitored or on or in the device to be monitored is arranged and has a number of suction through which room air or device cooling air samples are supplied continuously.
  • An evaluation unit is electronically connected to a detector and emits a signal according to predetermined criteria when the detector detects a fire detection variable.
  • This device has the disadvantage that settles increasingly dust at the holes of the intake. This leads to the detection system increasingly losing its functionality.
  • a Device of the type mentioned which is provided for the space protection and in which the supply line preferably consists of one or more pipes, the suction openings are distributed in the pipes at regular intervals throughout the room.
  • Such a method and such a device are known for example from DE 295 18 042 U1 or DE 33 48 107 C2 .
  • the detection reliability of a fire parameter decreases with increasing distance from the aspirating fan due to the pressure drop occurring in the pipelines.
  • the supply line may also consist of a pipeline, which is, however, significantly shorter, so that all suction can be the same. However, they must have different diameters with different number of suction because the total suction can only be within a small bandwidth.
  • suction holes can be drilled on the construction site in the supply / supply lines. Due to the wall thickness of the supply line accumulates in practice at the hole of the intake more dust. This then leads to the detection system increasingly losing its functionality. To prevent this, a frequent and high maintenance is necessary.
  • From DE 196 05 842 C1 discloses an apparatus and a method for defrosting an intake opening, which provides, in an intake duct of a fire alarm system, through which room or equipment air sucked and fed to a detector for detecting a fire parameter, an elastic element with a Intake opening coaxial passage opening to be arranged, which can be acted upon to defrost the suction port with a pressure surge.
  • the elastic element is simply inserted into the suction port. This has the disadvantage that in the case of a pressure surge in loose-fitting elastic element, the elastic element is blown out because it does not find enough resistance in the intake.
  • the device according to the invention provides that the suction openings in the supply line, which can have the same diameter and can be produced by drilling, have a rubber-elastic part with an inner opening with a smaller diameter.
  • the rubber-elastic part closes the opening of the supply line not only gas-tight, but also ensures that the film is loadable on both sides, ie through the hole in the film, a gas flow into the supply line and a gas flow from the Lead out take place without the rubber-elastic part has leaks against the supply line.
  • suction holes which are glued over with foil, it is not possible to direct the gas flow in the opposite direction, without the release film adhering from the outside being peeled off over a longer period of use.
  • These adhesively bonded foils are only suitable for reliably enabling the limitation of a gas flow into the device, but not for a gas flow which is carried out from the supply line.
  • the film on the rubber-elastic part is advantageous to arrange the film on the rubber-elastic part at the top.
  • a gas flow from the inside to the outside through the opening of the film by means of a fan.
  • the air flow can be blown at predetermined time intervals from the inside against the film by a timer, so that a continuous cleaning is given.
  • a filter can be used in the region of the intake openings over the entire tube. This prevents dust from entering the supply line and dust concentrations that form explosive mixtures.
  • the present invention provides two ways to protect the intake ports from contamination. Since the use with the elastic membrane in the outer diameter is considerably larger than the suction holes, a dust filter can be placed on the intake from the outside. For this purpose, a dust filter is integrated into the elastic membrane. By means of the air flow monitoring system, the condition of these dust filters is constantly checked for function. The dust filter can also be placed over the entire pipe of the supply line in the region of the intake openings in order to increase the filter surface. The filters are cleaned either by counter-rinsing, cleaning or replacement.
  • the great advantage of this solution according to the invention is that all suction holes get an insert which has a thin membrane with high sliding properties in the region of the suction bore.
  • This solution according to the invention largely prevents dust deposition in the region of the bore.
  • the further, great advantage of this invention is that the thin membrane has a certain elasticity. Should In the area of the intake openings by certain environmental properties deposit dust, which affects the reliability of the device for detecting incipient fires ", the introduction of scavenging air in the supply line can easily clean the intake, as by an increased pressure, the membrane bulges outward and the dust thereby easily detached.
  • the introduction of the purging air can be done via the intake fan by means of compressed air at the air outlet or via a bypass between the fan and the first suction port. Another possibility is to reverse the intake fan in its direction of rotation. Thus, the supply line to a pressure line and cleans the suction with the outflowing air. This can also be done automatically. However, it should be noted that the fire detection is interrupted during the rinsing phase.
  • FIG. 3 shows a feed line 3 with its suction opening 5.
  • This suction opening 5 can easily be passed by dust particles, so that contamination of the detectors continuously occurs.
  • the cross section of the opening 5 may have to be adapted to the desired flow cross section.
  • Figure 2 shows a rubber-elastic part 1, which has a groove 8 for fastening, wherein the inner diameter is provided with a film 2 having an opening 4 for the air flow.
  • the film 2 is equally strong on both sides.
  • the rubber-elastic part 1 is introduced into the supply line 3.
  • FIG. 1 shows a supply line 3, in which a rubber-elastic part 1 is introduced, which has a film 2 with an opening 4 at its upper edge. This is advantageous in that no corners arise between the rubber-elastic part 1 and the inner film 2, in which polluting particles can settle. Against coarse particles, the opening 4 of the film 2 is protected by a filter 7 to the entire tube 3.
  • FIG. 4 shows a rubber-elastic part 1 which is provided with a filter 6 above the suction opening 4.
  • a strong fouling is prevented by the fact that the air flow through the opening 4 is easily reversible, with the result that any dust deposits are entrained to the outside. Furthermore, the penetration of coarse particles by attaching the filters 6, 7 is prevented.
  • the present invention opens up a broad spectrum of operational capability, especially in dust-prone areas.
  • the inventive design the advantages of fire detection can be used with multi-sensor intake detectors through the use of filters and convenient cleaning by means of the membrane insert in dust hazardous areas.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)

Abstract

The device has a detector for detecting a fire parameter, at least one feed line (3) with an induction opening (4) and a fan for feeding air to the detector via the line. A rubber-elastic part (1) in the induction opening has an inner film with an opening of smaller diameter, whereby the part is in gas-tight contact with the feed line. An independent claim is also included for a method of cleaning an inventive device.

Description

Die Erfindung betrifft eine Vorrichtung zum Detektieren von Entstehungsbränden entsprechend dem Oberbegriff des ersten Patentanspruches und ein Verfahren zum Reinigen der Vorrichtung.
Die Erfindung ist überall dort anwendbar, wo Entstehungsbrände in Räumen oder elektronischen Geräten möglich sind. Die Vorrichtung ist weiterhin da anwendbar, wo Expiosionszonen nach ATEX95 und 137 vorhanden sind, beispielsweise in der staubbelasteten Industrie (Holz- und Mühlenindustrie.) Bei der Vorrichtung werden in einem Detektor zum Erkennen einer Brandkenngröße über eine Zuleitung, die in dem zu überwachenden Raum bzw. an oder in dem zu überwachenden Gerät angeordnet ist und eine Anzahl von Ansaugöffnungen aufweist, kontinuierlich Raumluft bzw. Geräteproben zugeführt. Wenn der Detektor eine Branderkennungsgröße detektiert, gibt eine Auswerteeinheit, die mit ihm elektronisch verbunden ist, nach vorgegebenen Kriterien ein Signal ab. Unter dem Begriff Zuleitung sind nicht ausschließlich Rohrleitungen zu verstehen, die für einen Raumschutz befestigt sind und zu einer Luftaustrittsöffnung in das Gehäuse des Detektors führen und die Raum- oder Gerätekühlluft durch Ansaugöffnungen einsaugen, die Zuleitung kann auch einen Ansaugtrichter, eine Sammelhaube oder eine T-förmige Rohrhaube darstellen, welche beispielsweise auf das Luftaustrittsgitter eines elektronischen Gerätes aufgesetzt und dadurch im Kühlhauptstrom des Gerätes angeordnet wird. Als Branderkennungsgröße werden physikalische Größen verstanden, die in der Umgebung eines Entstehungsbrandes meßbaren Veränderungen unterliegen, beispielsweise die Umgebungstemperatur, der Feststoff oder Flüssigkeits- oder Gasanteil in der Umgebungsluft oder die Umgebungsstrahlung.The invention relates to a device for detecting incipient fires according to the preamble of the first claim and a method for cleaning the device.
The invention is applicable everywhere where incipient fires in rooms or electronic devices are possible. The device is furthermore applicable where explosion zones according to ATEX95 and 137 are present, for example in the dust-contaminated industry (wood and mill industry). In the device, in a detector for detecting a fire characteristic via a supply line, which in the space to be monitored or is arranged on or in the device to be monitored and has a number of suction ports, continuously supplied to room air or device samples. If the detector detects a fire detection variable, an evaluation unit, which is electronically connected to it, outputs a signal according to predetermined criteria. The term "supply line" does not only mean pipelines that are attached to a room protection and lead to an air outlet opening in the housing of the detector and suck the room or device cooling air through suction, the supply line can also be a suction hopper, a collecting hood or a T- represent shaped pipe hood, which is placed for example on the air outlet grille of an electronic device and thereby arranged in the main cooling stream of the device. Fire detection variables are understood to mean physical quantities which are subject to measurable changes in the environment of an incipient fire, for example the ambient temperature, the solid or liquid or gas component in the ambient air or the ambient radiation.

Aus DE 196 05 638 C1 sind ein Verfahren und eine Vorrichtung zum Detektieren von Entstehungsbränden in Räumen oder in elektronischen Geräten bekannt mit einem Detektor zur Erkennung einer Brandkenngröße mit wenigstens eine Zuleitung, die in dem zu überwachenden Raum bzw. an oder in dem zu überwachenden Gerät angeordnet ist und eine Anzahl von Ansaugöffnungen aufweist, durch die kontinuierlich Raumluft bzw. Gerätekühlluftproben zugeführt werden. Eine Auswerteeinheit ist mit einem Detektor elektronisch verbunden und gibt nach vorgegebenen Kriterien ein Signal ab, wenn der Detektor eine Branderkennungsgröße detektiert. Zum Anpassen des wirksamen Querschnittes der Ansaugöffnungen sind diese mit einer Folie überklebt, so daß der wirksame Querschnitt der Ansaugöffnungen verringert wird. Diese Vorrichtung hat den Nachteil, daß sich an den Löchern der Ansaugöffnung vermehrt Staub absetzt. Dieser führt dazu, daß das Detektionssystem zunehmend seine Funktionsfähigkeit verliert. Eine Vorrichtung der eingangs genannten Art, die für den Raumschutz vorgesehen ist und bei der die Zuleitung vorzugsweise aus einer oder mehreren Rohrleitungen besteht, sind die Ansaugöffnungen in den Rohrleitungen in regelmäßigen Abständen auf den ganzen Raum verteilt. Ein solches Verfahren und eine solche Vorrichtung sind beispielsweise aus der DE 295 18 042 U1 oder der DE 33 48 107 C2 bekannt. Allerdings ist es hierbei als nachteilig erkannt worden, daß die Detektionssicherheit einer Brandkenngröße mit zunehmender Entfernung von dem ansaugenden Lüfter aufgrund des in den Rohrleitungen entstehenden Druckabfalls abnimmt. Bei Verwendung des genannten Verfahrens bzw. der Vorrichtung zur Einrichtungsüberwachung, d. h. beispielsweise zur Überwachung von elektronischen Geräten, kann die Zuleitung auch aus einer Rohrleitung bestehen, die dann allerdings deutlich kürzer ist, so daß alle Ansaugöffnungen gleich sein können. Allerdings müssen sie bei unterschiedlicher Anzahl der Ansaugöffnungen unterschiedliche Durchmesser aufweisen, weil die Gesamtansaugfläche nur innerhalb einer kleinen Bandbreite liegen kann.From DE 196 05 638 C1 , a method and a device for detecting incipient fires in rooms or in electronic devices are known with a detector for detecting a fire characteristic with at least one supply line in the space to be monitored or on or in the device to be monitored is arranged and has a number of suction through which room air or device cooling air samples are supplied continuously. An evaluation unit is electronically connected to a detector and emits a signal according to predetermined criteria when the detector detects a fire detection variable. To adjust the effective cross-section of the suction openings they are covered with a film, so that the effective cross-section of the suction is reduced. This device has the disadvantage that settles increasingly dust at the holes of the intake. This leads to the detection system increasingly losing its functionality. A Device of the type mentioned, which is provided for the space protection and in which the supply line preferably consists of one or more pipes, the suction openings are distributed in the pipes at regular intervals throughout the room. Such a method and such a device are known for example from DE 295 18 042 U1 or DE 33 48 107 C2 . However, in this case it has been recognized as disadvantageous that the detection reliability of a fire parameter decreases with increasing distance from the aspirating fan due to the pressure drop occurring in the pipelines. When using the said method or device for device monitoring, ie, for example, for monitoring electronic devices, the supply line may also consist of a pipeline, which is, however, significantly shorter, so that all suction can be the same. However, they must have different diameters with different number of suction because the total suction can only be within a small bandwidth.

Diese müssen nach den physikalischen Gesetzen berechnet werden. Diese Ansaugöffnungen können auf der Baustelle in die Zuleitung/Zuleitungen gebohrt werden. Aufgrund der Wanddicke der Zuleitung sammelt sich in der Praxis am Loch der Ansaugöffnung vermehrt Staub an. Dies führt dann dazu, daß das Detektionssystem zunehmend seine Funktionsfähigkeit verliert.
Um dieses zu verhindern, ist ein häufiger und hoher Wartungsaufwand notwendig.These must be calculated according to the laws of physics. These suction holes can be drilled on the construction site in the supply / supply lines. Due to the wall thickness of the supply line accumulates in practice at the hole of the intake more dust. This then leads to the detection system increasingly losing its functionality.
To prevent this, a frequent and high maintenance is necessary.

Aus DE 196 05 842 C1 geht eine Vorrichtung und ein Verfahren zum Enteisen einer Ansaugöffnung hervor, welche vorsieht, in einem Ansaugkanal eines Brandmeldesystems, durch welchen Raum- oder Geräteluft angesaugt und einem Detektor zum Erkennen einer Brandkenngröße zugeleitet wird, ein elastisches Element mit einer zur Ansaugöffnung koaxialen Durchgangsöffnung anzuordnen, welches zum Enteisen der Ansaugöffnung mit einem Druckstoß beaufschlagbar ist. Im einfachsten Fall wird das elastische Element einfach in die Ansaugöffnung gesteckt. Das hat den Nachteil, daß im Falle eines Druckstoßes bei lockersitzendem elastischen Element das elastische Element herausgeblasen wird, da es nicht ausreichend Widerstand in der Ansaugöffnung findet. Daher ist in einer bevorzugten Ausführungsvariante vorgesehen, das elastische Element mittels einer flexiblen Manschette am Rohr zu befestigen, so daß das Element nicht herausfallen kann. Damit ein derartig elastisches Element allerdings von Staub befreit werden kann, da dieses Element zusetzt, kann die relativ dicke Wandung des Elementes nicht in Schwingungen versetzt werden, so daß der Selbstreinigungseffekt gering ist. Dazu sind zusätzlich flexible Elemente 13 vorhanden, die in einer Art Blattfeder ausgebildet sind.From DE 196 05 842 C1 discloses an apparatus and a method for defrosting an intake opening, which provides, in an intake duct of a fire alarm system, through which room or equipment air sucked and fed to a detector for detecting a fire parameter, an elastic element with a Intake opening coaxial passage opening to be arranged, which can be acted upon to defrost the suction port with a pressure surge. In the simplest case, the elastic element is simply inserted into the suction port. This has the disadvantage that in the case of a pressure surge in loose-fitting elastic element, the elastic element is blown out because it does not find enough resistance in the intake. Therefore, it is provided in a preferred embodiment, to secure the elastic member by means of a flexible sleeve on the pipe, so that the element can not fall out. However, so that such an elastic element can be freed of dust, since this element added, the relatively thick wall of the element can not be set in vibration, so that the self-cleaning effect is low. For this purpose, additional flexible elements 13 are provided, which are formed in a kind of leaf spring.

Ausgehend von diesem Stand der Technik, ist es Aufgabe der Erfindung, eine Vorrichtung zum Detektieren von Entstehungsbränden mit einem Detektor zum Erkennen einer Brandgröße zu entwickeh mit mindestens einer mit Ansaugöffnung versehenen Zuleitung mit einem Lüfter, wobei die in der Zuleitung befindlichen gummielastischen Teile ohne Manschette um das Rohr sicher in der Ansaugöffnung befestigt sind und bei gleichbleibendem Durchmesser der Ansaugöffnung gut reinigbar sein sollen und eine Möglichkeit bieten, unterschiedliche Durchgangsströme zu realisieren.Based on this prior art, it is an object of the invention to devise a device for detecting incipient fires with a detector for detecting a fire size with at least one intake opening provided with a fan, wherein the rubber-elastic parts located in the supply line without cuff order the pipe are securely fastened in the suction opening and with a constant diameter of the suction opening should be easy to clean and provide a way to realize different flow rates.

Diese Aufgabe wird durch eine Vorrichtung nach den Merkmalen des ersten Patentanspruches und ein Verfahren zum Reinigen der Vorrichtung gelöst.This object is achieved by a device according to the features of the first claim and a method for cleaning the device.

Unteransprüche geben vorteilhafte Ausgestaltungen der Erfindung wieder.Subclaims give advantageous embodiments of the invention again.

Die erfindungsgemäße Vorrichtung sieht vor, daß die Ansaugöffnungen in der Zuleitung, welche einen gleichen Durchmesser aufweisen können und durch Bohren herstellbar sind, ein gummielastisches Teil mit einer innenliegenden Öffnung mit geringerem Durchmesser aufweisen. Das gummielastische Teil verschließt die Öffnung der Zuleitung nicht nur gasdicht, sondern sorgt auch dafür, daß die Folie beidseitig belastbar ist, d. h. durch das Loch in der Folie kann eine Gasströmung in die Zuleitung und eine Gasströmung aus der Zuleitung heraus stattfinden, ohne daß das gummielastische Teil Undichtheiten gegenüber der Zuleitung aufweist.
Nach dem Stand der Technik, bei dem Ansaugbohrungen vorhanden sind, die mit Folie überklebt sind, ist es nicht möglich, den Gasstrom in die entgegengesetzte Richtung zu leiten, ohne daß es über eine längere Gebrauchsdauer zu Ablöseerscheinungen der von außen aufgeklebten Folie kommt. Diese aufgeklebten Folien sind lediglich geeignet, die Begrenzung eines Gasstromes in die Vorrichtung hinein zuverlässig zu ermöglichen, nicht aber für einen Gasstrom, der aus der Zuleitung heraus durchgeführt wird.The device according to the invention provides that the suction openings in the supply line, which can have the same diameter and can be produced by drilling, have a rubber-elastic part with an inner opening with a smaller diameter. The rubber-elastic part closes the opening of the supply line not only gas-tight, but also ensures that the film is loadable on both sides, ie through the hole in the film, a gas flow into the supply line and a gas flow from the Lead out take place without the rubber-elastic part has leaks against the supply line.
According to the state of the art, in which there are suction holes which are glued over with foil, it is not possible to direct the gas flow in the opposite direction, without the release film adhering from the outside being peeled off over a longer period of use. These adhesively bonded foils are only suitable for reliably enabling the limitation of a gas flow into the device, but not for a gas flow which is carried out from the supply line.

Vorteilhaft ist es, die Folie am gummielastischen Teil oben anzuordnen.
Für das Reinigen der Vorrichtung werden Staubpartikel, die sich in der Folie angesetzt haben, dadurch beseitigt, daß mittels eines Lüfters ein Gasstrom von innen nach außen durch die Öffnung der Folie geblasen wird. Es ist vorteilhaft, diese Umkehr des Luftstromes in regelmäßigen Abständen durchzuführen. Dazu kann durch eine Zeitschaltuhr der Luftstrom in vorgegebenen Zeitintervallen von innen gegen die Folie geblasen werden, so daß eine kontinuierliche Reinigung gegeben ist.It is advantageous to arrange the film on the rubber-elastic part at the top.
For the cleaning of the device dust particles that have been recognized in the film, eliminated by blowing a gas flow from the inside to the outside through the opening of the film by means of a fan. It is advantageous to carry out this reversal of the air flow at regular intervals. For this purpose, the air flow can be blown at predetermined time intervals from the inside against the film by a timer, so that a continuous cleaning is given.

Vorteilhaft ist es, die Folie mit einer Anti-Haft-Beschichtung zu versehen. Weiterhin ist es vorteilhaft, wenn bestimmte Bereiche der Ansaugöffnungen zusätzlich mit einem Filter versehen sind. Dazu kann im Bereich der Ansaugöffnungen über das gesamte Rohr ein Filter eingesetzt werden.
Dadurch wird verhindert, daß Staub in die Zuleitung eindringen kann und Staubkonzentrationen entstehen können, die explosive Gemische bilden. Die vorliegende Erfindung bietet zwei Möglichkeiten, die Ansaugöffnungen vor Verschmutzung zu schützen. Da der Einsatz mit der elastischen Membrane im Außendurchmesser erheblich größer als die Ansaugbohrungen ist, kann von außen ein Staubfilter über die Ansaugöffnung gesetzt werden. Hierzu wird ein Staubfilter in die elastische Membrane integriert. Mittels des Luftstromüberwachungssystems wird der Zustand dieser Staubfilter ständig auf Funktion überprüft. Der Staubfilter kann auch über das gesamte Rohr der Zuleitung im Bereich der Ansaugöffnungen gesetzt werden, um die Filteroberfläche zu vergrößern. Die Reinigung der Filter erfolgt entweder durch Gegenspülung, Reinigung oder Auswechselung.It is advantageous to provide the film with an anti-adhesion coating. Furthermore, it is advantageous if certain areas of the intake openings are additionally provided with a filter. For this purpose, a filter can be used in the region of the intake openings over the entire tube.
This prevents dust from entering the supply line and dust concentrations that form explosive mixtures. The present invention provides two ways to protect the intake ports from contamination. Since the use with the elastic membrane in the outer diameter is considerably larger than the suction holes, a dust filter can be placed on the intake from the outside. For this purpose, a dust filter is integrated into the elastic membrane. By means of the air flow monitoring system, the condition of these dust filters is constantly checked for function. The dust filter can also be placed over the entire pipe of the supply line in the region of the intake openings in order to increase the filter surface. The filters are cleaned either by counter-rinsing, cleaning or replacement.

Der große Vorteil dieser erfindungsgemäßen Lösung liegt darin, daß alle Ansaugbohrungen einen Einsatz bekommen, der im Bereich der Ansaugbohrung eine dünne Membrane mit hohen Gleiteigenschaften hat. Durch diese erfindungsgemäße Lösung wird in hohem Maße eine Staubablagerung im Bereich der Bohrung verhindert. Der weitere, große Vorteil dieser Erfindung liegt darin, daß die dünne Membrane eine gewisse Elastizität aufweist. Sollte sich im Bereich der Ansaugöffnungen durch bestimmte Umwelteigenschaften Staub ablagern, der die Funktionssicherheit der Vorrichtung zum Detektieren von Entstehungsbränden" beeinträchtigt, kann das Einbringen von Spülluft in die Zuleitung die Ansaugöffnungen problemlos reinigen, da sich durch einen erhöhten Druck die Membrane nach außen wölbt und den Staub dadurch leicht ablöst.The great advantage of this solution according to the invention is that all suction holes get an insert which has a thin membrane with high sliding properties in the region of the suction bore. This solution according to the invention largely prevents dust deposition in the region of the bore. The further, great advantage of this invention is that the thin membrane has a certain elasticity. Should In the area of the intake openings by certain environmental properties deposit dust, which affects the reliability of the device for detecting incipient fires ", the introduction of scavenging air in the supply line can easily clean the intake, as by an increased pressure, the membrane bulges outward and the dust thereby easily detached.

Das Einbringen der Spülluft kann über den Ansauglüfter mittels Druckluft am Luftaustritt oder über einen Bypass zwischen Ventilator und der ersten Ansaugöffnung erfolgen.
Eine weitere Möglichkeit besteht darin, den Ansauglüfter in seiner Drehrichtung umzukehren. Damit wird die Zuleitung zu einer Druckleitung und reinigt mit der ausströmenden Luft die Ansaugöffnungen. Dies kann auch automatisch erfolgen. Hierbei ist aber zu beachten, daß während der Spülphase die Branddetektion unterbrochen ist.The introduction of the purging air can be done via the intake fan by means of compressed air at the air outlet or via a bypass between the fan and the first suction port.
Another possibility is to reverse the intake fan in its direction of rotation. Thus, the supply line to a pressure line and cleans the suction with the outflowing air. This can also be done automatically. However, it should be noted that the fire detection is interrupted during the rinsing phase.

Im Folgenden wird die Erfindung an einem Ausführungsbeispiel und vier Figuren näher erläutert. Die Figuren zeigen:

  • Figur 1: Zuleitung mit gummielastischem Teil und Filter über dem gesamten Rohr im Schnitt
  • Figur 2: Gummielastisches Teil im Schnitt mit innenliegender Folie
  • Figur 3: Zuleitung mit Ansaugöffnung
  • Figur 4: Gummielastisches Teil mit Filter und mittig eingebrachter Folie
In the following the invention will be explained in more detail by means of an exemplary embodiment and four figures. The figures show:
  • Figure 1: supply line with rubber-elastic part and filter over the entire pipe in section
  • Figure 2: rubber elastic part in section with internal foil
  • Figure 3: supply line with suction
  • Figure 4: rubber elastic part with filter and centrally placed film

Die Figur 3 zeigt eine Zuleitung 3 mit ihrer Ansaugöffnung 5. Diese Ansaugöffnung 5 kann problemlos von Staubteilchen passiert werden, so daß es kontinuierlich zur Verschmutzung der Detektoren kommt. Weiterhin muß der Querschnitt der Öffnung 5 unter Umständen dem gewünschten Strömungsquerschnitt angepaßt werden. FIG. 3 shows a feed line 3 with its suction opening 5. This suction opening 5 can easily be passed by dust particles, so that contamination of the detectors continuously occurs. Furthermore, the cross section of the opening 5 may have to be adapted to the desired flow cross section.

Die Figur 2 zeigt ein gummielastisches Teil 1, welches zum Befestigen eine Nut 8 aufweist, wobei der Innendurchmesser mit einer Folie 2 versehen ist, die eine Öffnung 4 für den Luftstrom aufweist. Die Folie 2 ist nach beiden Seiten gleich stark belastbar. Das gummielastische Teil 1 wird in die Zuleitung 3 eingebracht. Figure 2 shows a rubber-elastic part 1, which has a groove 8 for fastening, wherein the inner diameter is provided with a film 2 having an opening 4 for the air flow. The film 2 is equally strong on both sides. The rubber-elastic part 1 is introduced into the supply line 3.

Die Figur 1 zeigt eine Zuleitung 3, in die ein gummielastisches Teil 1 eingebracht ist, welches eine Folie 2 mit einer Öffnung 4 an ihrem oberen Rand aufweist. Das ist insofern vorteilhaft, als keine Ecken zwischen dem gummielastischen Teil 1 und der innenliegenden Folie 2 entstehen, in denen sich verschmutzende Teilchen absetzen können. Gegen grobe Partikel ist die Öffnung 4 der Folie 2 durch einen Filter 7 um das gesamte Rohr 3 geschützt. 1 shows a supply line 3, in which a rubber-elastic part 1 is introduced, which has a film 2 with an opening 4 at its upper edge. This is advantageous in that no corners arise between the rubber-elastic part 1 and the inner film 2, in which polluting particles can settle. Against coarse particles, the opening 4 of the film 2 is protected by a filter 7 to the entire tube 3.

Die Figur 4 zeigt ein gummielastisches Teil 1, welches mit einem Filter 6 über der Ansaugöffnung 4 versehen ist. Bei allen Teilen, wie sie in den Figuren 1, 2 und 4 dargestellt sind, wird ein starkes Verschmutzen dadurch verhindert, daß der Luftstrom durch die Öffnung 4 problemlos umkehrbar ist, was zur Folge hat, daß eventuelle Staubablagerungen nach außen mitgerissen werden. Weiterhin wird das Eindringen grober Teilchen durch das Anbringen der Filter 6, 7 verhindert. FIG. 4 shows a rubber-elastic part 1 which is provided with a filter 6 above the suction opening 4. In all parts, as shown in Figures 1, 2 and 4, a strong fouling is prevented by the fact that the air flow through the opening 4 is easily reversible, with the result that any dust deposits are entrained to the outside. Furthermore, the penetration of coarse particles by attaching the filters 6, 7 is prevented.

Die vorliegende Erfindung eröffnet ein weites Spektrum der Einsatzfähigkeit, besonders in staubgefährdeten Bereichen.
Durch die erfindungsgemäße Ausführung können die Vorteile der Branddetektion mit Multisensor-Ansaugmeldern durch den Einsatz von Filtern und die komfortable Reinigung mittels des Membraneinsatzes in staubgefährdeten Bereichen genutzt werden.The present invention opens up a broad spectrum of operational capability, especially in dust-prone areas.
The inventive design, the advantages of fire detection can be used with multi-sensor intake detectors through the use of filters and convenient cleaning by means of the membrane insert in dust hazardous areas.

Liste der verwendete BezugszeichenList of reference numbers used

1.1.
Gummiteilrubber part
2.Second
Dünne HautThin skin
3.Third
Rohr/ZuleitungPipe / supply
4.4th
Ansaugöffnungsuction
5.5th
Öffnung von 3Opening of 3
6.6th
Filter über der AnsaugöffnungFilter over the intake opening
7.7th
Filter über das gesamte RohrFilter over the entire pipe
8.8th.
Nutgroove

Claims (5)

  1. An incipient fire detection apparatus with a detector for detecting a fire parameter, said detection apparatus having at least one feed line (3) provided with an intake port (5) and a fan for supplying air to the detector through the feed line (3), characterized in that in said intake port (5) there is provided a rubber-elastic part (1) with an inner foil (2) having an opening (4) with a smaller diameter, said part (1) resting against said port (5) of said feed line (3) so as to provide a gas-tight fit by means of a circumferential groove (8) and said foil (2) being disposed at the top on said rubber-elastic part (1).
  2. The apparatus as set forth in claim 1, characterized in that the foil (2) is provided with a non-stick coating.
  3. The apparatus as set forth in claim 1 and 2, characterized in that the region of the intake ports (5) is provided with a filter (6).
  4. The apparatus as set forth in claim 1 through 3, characterized in that a filter (7) is placed over the entire tube in the region of the intake ports (5).
  5. A method of cleaning an apparatus as set forth in claim 1, characterized in that a gas flow is blown from the inside outward through the port (4) in the foil (2).
EP04028927A 2003-12-13 2004-12-07 Apparatus and process for detecting the formation of a fire Active EP1542188B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10358531 2003-12-13
DE10358531A DE10358531A1 (en) 2003-12-13 2003-12-13 Apparatus and method for detecting incipient fires

Publications (2)

Publication Number Publication Date
EP1542188A1 EP1542188A1 (en) 2005-06-15
EP1542188B1 true EP1542188B1 (en) 2006-08-02

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Country Status (6)

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US (1) US20050128098A1 (en)
EP (1) EP1542188B1 (en)
CN (1) CN100501788C (en)
AT (1) ATE335266T1 (en)
DE (2) DE10358531A1 (en)
RU (1) RU2004136274A (en)

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US8791826B2 (en) 2010-11-29 2014-07-29 Minimax Gmbh & Co. Kg Method and device for fire detection in enclosed environments

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CN116758694B (en) * 2023-06-16 2023-12-08 广东钧逸建筑工程有限公司 Automatic alarm and ringing device for fire control

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US8791826B2 (en) 2010-11-29 2014-07-29 Minimax Gmbh & Co. Kg Method and device for fire detection in enclosed environments

Also Published As

Publication number Publication date
US20050128098A1 (en) 2005-06-16
ATE335266T1 (en) 2006-08-15
DE10358531A1 (en) 2005-07-28
CN100501788C (en) 2009-06-17
RU2004136274A (en) 2006-05-20
CN1627330A (en) 2005-06-15
DE502004001093D1 (en) 2006-09-14
EP1542188A1 (en) 2005-06-15

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