EP3274975B1 - Détecteur d'incendie présentant un dispositif de lumière diffusée au niveau d'une ouverture d'entrée de fumée en vue de la surveillance de l'encrassement - Google Patents

Détecteur d'incendie présentant un dispositif de lumière diffusée au niveau d'une ouverture d'entrée de fumée en vue de la surveillance de l'encrassement Download PDF

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Publication number
EP3274975B1
EP3274975B1 EP16703995.7A EP16703995A EP3274975B1 EP 3274975 B1 EP3274975 B1 EP 3274975B1 EP 16703995 A EP16703995 A EP 16703995A EP 3274975 B1 EP3274975 B1 EP 3274975B1
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EP
European Patent Office
Prior art keywords
light
inlet opening
detector
smoke inlet
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.)
Active
Application number
EP16703995.7A
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German (de)
English (en)
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EP3274975A1 (fr
Inventor
Walter Vollenweider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Schweiz AG
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Siemens Schweiz AG
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Publication date
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Publication of EP3274975A1 publication Critical patent/EP3274975A1/fr
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/043—Monitoring of the detection circuits of fire detection circuits
    • 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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
    • 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
    • G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms

Definitions

  • the invention relates to a fire detector, in particular an optical smoke detector.
  • the fire detector has a detector housing with a smoke inlet opening, a detection unit arranged in the detector housing for detecting specific fire parameters, an evaluation unit for outputting a fire alarm and at least one light transmitter and light receiver connected to the evaluation unit for monitoring the smoke inlet opening for inadmissible contamination.
  • Such a fire alarm is eg from the EP 1 857 989 A1 or from the EP 1 870 866 A1 known.
  • fire detectors are preferably smoke detectors, smoke detectors or smoke detectors as a unit. Compared to linear smoke detectors, they are designed as point detectors or point detectors. Such fire detectors typically have a working according to the scattered light principle optical detection unit for the detection of smoke particles. Alternatively or additionally, they may have a gas sensor for the detection of typical gases. Furthermore, such fire detectors may have a temperature sensor for detecting an inadmissibly high temperature in their environment.
  • fire detectors can be connected via a common detector line, in particular via a two-wire line, signal and / or data technology with a fire alarm panel. You can also have an autonomous power supply, such as a battery.
  • fire detectors can be a radio module for transmitting an alarm message, a warning message or a status information to an adjacent Fire detector or have a fire alarm panel. They can also be set up for forwarding an alarm message, warning message or status information transmitted by a neighboring fire detector via radio to another neighboring fire detector or to a fire alarm control panel.
  • smoke detectors for dwellings, apartments and rooms with similar use - installation, operation and maintenance must be checked at least once a year by a prescribed visual and functional test. It can also be automated.
  • the object of the check is, on the one hand, that no disturbing objects are present in the vicinity of the smoke alarm device, such as, for example, within a radius of half a meter of the hazard alarm, which can cause a flow shield for the smoke to be detected in case of fire.
  • the smoke inlets in the housing must be regularly checked for permeability to smoke or for flue gas.
  • the light emitter and the light receiver are arranged in a scattered light arrangement.
  • a scattered light volume determined by the scattered light arrangement lies in the region of the smoke inlet opening and in particular in a region of the smoke inlet opening that tends to become soiled.
  • the smoke inlet itself can be divided two or more times, such as by connecting webs. It can be composed of several slots or holes.
  • the light transmitter is preferably a light emitting diode, such as an IR light emitting diode, a white, red, green or blue luminous LED or a UV light emitting diode.
  • the light emitter may be a laser diode.
  • the light receiver is typically a spectrally tuned to the light emitter photodiode or phototransistor.
  • the light emitter is set up and aligned in such a way that a first part of an emitted light beam traverses the area of the smoke inlet opening without touching adjacent housing parts.
  • the first part of the emitted light beam traverses the region of the smoke inlet opening without contact.
  • This can e.g. be achieved by a light emitter downstream aperture.
  • a laser beam as the first part of the light beam this is already sharply limited due to its optical generation.
  • the housing part in the region of the smoke inlet opening is e.g. a main body or a detector cap of the detector housing, an insect screen or a connecting bridge between the base body and the detector cap.
  • the insect repellent is in particular a net or grid.
  • the light emitter can be set up and aligned such that a second part of the light beam strikes a housing part adjacent to the smoke inlet opening.
  • the surface of the housing part is designed and / or aligned such that the incident there second part of the light beam is deflected away or absorbed by the light receiver.
  • the second housing part may for example be glossy or specular.
  • the orientation of the housing part is determined relative to the detector housing so that the reflected light beam is preferably deflected into the vicinity of the fire detector and thus away from the light receiver.
  • the housing part may alternatively have a light-absorbing layer, such as a so-called "super-black". Such substances absorb well over 99% of the impinging Lichts and are available for example from Surrey NanoSystems under the brand name Vantablack®.
  • a service message can be output by means of the evaluation unit, if the scattered light detected by the light receiver exceeds a minimum value.
  • the service message may also indicate a level of contamination, such as have a percentage, where 0% would mean no pollution and 100% complete pollution.
  • the evaluation unit is preferably a processor-based processing unit such as e.g. a microcontroller or processor. It can also be referred to as an (electronic) control unit.
  • the service message may be wireless or via a connected bus e.g. be forwarded to a higher-level fire alarm center to inform service personnel for an upcoming cleaning of the relevant fire alarm.
  • the service message may alternatively or additionally be issued by a lit or flashing LED, or by a warning beeper of the fire detector.
  • the evaluation unit can also be set up to control the light transmitters one after the other. It may be configured to selectively detect and evaluate a received signal of the at least one associated light receiver.
  • the essence of the invention lies in the fact that the light scattered by soiling and then detectable is used as a measure of the contamination of a fire detector.
  • a non-contaminated fire detector such as when new, or with only minor contamination no significant stray light is detectable.
  • the scattered light Due to the high dynamic range of a photoreceiver is thus advantageously the extent of contamination can be determined.
  • the extinction principle is used in the prior art, in which the light emitter and the light receiver are located on a common optical axis. In this case, the attenuation of the received light is determined due to contamination.
  • the disadvantage of the principle lies in the low dynamic range and in the difficult calibration of this arrangement to a maximum light level for non-pollution. In order to avoid a false alarm, therefore, the limit for the light to be detected is set low.
  • the detector housing is substantially symmetrical, in particular rotationally symmetrical. It has an axis of symmetry.
  • the symmetry axis is preferably also the constructive main axis of the fire detector housing.
  • the light emitter and light receiver can alternate in the circumferential direction. Preferably, these are arranged distributed uniformly along the circumference.
  • the respective light transmitter can be designed such that it is arranged in each case in a scattered light arrangement to its two circumferentially adjacent light receivers.
  • a respective light emitter and a respective light receiver are in a forward scatter arrangement arranged with a scattered light angle in the range of 20 ° to 80 °.
  • a respective light emitter and a respective light receiver may also be arranged in a backward scattering order with a scattered light angle in the range of 110 ° to 150 °.
  • a respective light transmitter and a respective light receiver can be combined to form a light-emitting receiver as a structural unit.
  • the light emitter and the light receiver are then arranged in a backward scattering order with a scattered light angle in the range of 150 ° to 180 °.
  • the advantage with this embodiment lies in the integration of light emitter and light receiver in a single component.
  • a respective light transmitter, a respective light receiver and / or a respective light-emitting receiver is arranged on a circuit carrier in the detector housing. It is the respective light emitter, the light receiver and / or the light transceiver upstream of a light guide. An opposite (second) end piece of the respective light guide is passed through the detector housing for light extraction and / or light coupling in the region of the smoke inlet opening.
  • upstream is meant that a first end of the light guide for light coupling and / or light extraction of the respective optically active surface of the light emitter, light receiver or the light-emitting receiver is opposite.
  • a respective light transmitter is arranged on a circuit carrier in the detector housing.
  • An optical waveguide is connected upstream of the respective light transmitter, with an opposite (second) end piece of the respective optical waveguide being guided through the detector housing for light extraction in the region of the smoke inlet opening.
  • the respective light receiver is arranged on the detector cap in the region of the smoke inlet opening.
  • the respective (second) end of a light guide is an optical lens and / or it is formed as an optical prism.
  • a directed Lichtein- and coupling is possible.
  • the respective light guide is at the same time part of a connecting web between a main body and a detector cap of the detector housing.
  • the integration of the light guide into the connecting web protects the optical fibers against mechanical influences.
  • the respective tail is advantageous in the "pollution shadow" by the local flow-shielding effect of the connecting web.
  • FIG. 1 shows a plan view of an exemplary fire detector M with three light emitters 1 and three light receivers 2 for pollution monitoring according to the invention.
  • the fire detector M shown is in particular an optical smoke detector. It typically has a detection unit DET arranged in the detector housing 3 for detecting specific fire characteristics.
  • the detection unit DET is shielded from direct ambient light, e.g. through fins, but permeable to smoke to be detected.
  • the housing 3 shown comprises a main body 4 and a so-called detector cap 5 remote therefrom. Between these two housing parts 4, 5 is formed a smoke inlet opening OF for the possible passage of smoke to be detected to the detection unit DET.
  • the reference symbol N designates an insect screen which prevents insects or spiders from penetrating into the interior of the detection unit DET. It is typically a grid or a net.
  • the fire detector M further comprises an evaluation unit 7 for outputting a fire alarm AL.
  • the evaluation unit 7 is typically processor-based and in particular a microcontroller.
  • the fire alarm AL can be output via a connected detector line, via radio and / or via a visual and / or acoustic indicator on the M fire detector.
  • at least one light transmitter 1 and one light receiver 2 are connected to the evaluation unit 7. They are provided for monitoring the smoke inlet opening OF on an inadmissible pollution V out.
  • three light emitters 1 are distributed uniformly in the circumferential direction about an axis of symmetry Z of the fire detector M.
  • three light receivers 2 are likewise arranged in the circumferential direction.
  • the at least one light transmitter 1 and the at least one light receiver 2 are arranged in a scattered light arrangement.
  • scattered light arrangement is meant that none of the light receivers 2 is aligned with one of the light emitters 1.
  • the respective light receivers 2 receive no direct light from the respective light emitter 1 of a common scattered light arrangement.
  • Light emitter and associated light receiver are thus not on a common optical axis.
  • the three light emitters 1 each emit two light bundles L1, L2 to the two circumferentially adjacent light receivers 2.
  • a respective scattered light volume SV is determined in such a way that it lies in a region of the smoke inlet opening OF which tends towards contamination V.
  • the scattered light volumes SV1, SV2 of two stray light arrangements formed are shown in detail.
  • the light emitter 1, 11, 12 can be arranged and aligned in such a way that a first part D of an emitted light beam L1 traverses the area of the smoke inlet opening OF without touching adjacent housing parts 4, 5, 8, N.
  • the light beam L1 passes the area of the smoke inlet opening OF without contact.
  • Such an adjacent housing part 4, 5, 8, N may be the main body 4, the detector cap 5 of the detector housing 3, an insect screen N or a connecting web 9.
  • the light beam L1 is preferably sharply defined. This can be done for example by a diaphragm which is connected downstream of a respective light transmitter 1.
  • the emitted light beam L1 is already sharply defined.
  • the FIG. 1 both light beams L1 emitted by the light emitters 11, 12 pass through the area of the smoke inlet opening OF without contact.
  • the first part D of the emitted light beam L1 corresponds to the light beam L1 itself.
  • the boundary of the light bundles L1, L2 is indicated by dotted edge rays R marked.
  • the light emitter 1 is also set up and aligned such that a second part A of the light beam L2 impinges on a housing part 4, 5, 8, N adjoining the smoke inlet opening OF.
  • a housing part 4, 5, 8, N adjoining the smoke inlet opening OF.
  • the surface of the housing part 4, 5, 8, N is designed and oriented such that the second part A of the light beam L2 impinging there is deflected away from the light receiver 2.
  • the adjacent housing part N ie the insect repellent, is reflective.
  • the outer surfaces of the insect screen N are optically oriented in relation to the light coming from the light emitters 11, 13 in such a way that the second part A of the light beam L2 reflected thereon does not reach the assigned light receiver 2.
  • a first part D of the second light bundle L2 as described above, also passes without contact through the area of the smoke inlet opening OF shown.
  • a part of the light bundle L1 emitted by the light transmitter 13 is now scattered at a contamination V accumulated in the region of the smoke inlet opening OF.
  • the contamination V may be, for example, a loose accumulation of dust, dust flakes or lint.
  • This scattered light S finally reaches the light receiver 2 for detection.
  • a service message WARN is then output by means of the evaluation unit 7 if the scattered light S detected by the light receiver 2 exceeds a predetermined minimum value.
  • FIG. 2 shows a plan view of two stray light arrangements in FIG. 1 in detail, formed from the two light emitters 11, 12 and the common light receiver 2.
  • the reception area of the light receiver 2 is designated. This is preferably sharply limited, such as by means of an upstream aperture.
  • SV1 denotes a first scattered light volume, which is the intersection volume of the light bundle L1 of the light emitter 11 and the reception area EB of the light receiver 2 in geometric terms.
  • SV2 denotes a second scattered light volume, which is correspondingly the cutting volume from the light bundle L1 of the light emitter 12 and the reception area EB of the light receiver 2.
  • the two scattered light volumes SV1, SV2, which are hatched and partly overlap, are located in the area of the smoke inlet opening OF. Dirt V in the region of such a scattered light volume SV1, SV2 cause light scattered therefrom partially reaches the light receiver 2 and can be detected by it.
  • the light receiver 2 is in each case arranged with the adjacent light emitter 11, 12 in a forward scattering arrangement with a scattered light angle ⁇ of 120 °.
  • FIG. 3 shows a side view of the fire detector M according to FIG. 1 along the viewing direction III entered there.
  • a second part A of the light beam L2 emitted by the light transmitter 13 is reflected both on the insect screen N and on an outer contour of the detector cap 5 such that no light of the light beam L2 reaches the associated light receiver 2.
  • a part of the light beam L1 emitted by the light emitter 13 is scattered at the local pollution V and detected as scattered light S by the light receiver 2.
  • G denoted by the pollution V attenuated, attenuated light beams.
  • the fire detector M has a arranged in the detector housing 3 circuit carrier 6, on which the three light emitter 1 and the three light receivers 2 are arranged. They are each preceded by a light guide 8 for light extraction and / or light coupling in the smoke inlet opening OF.
  • the respective light guides 8 are guided through a corresponding recess in the detector housing 3 and in the present example in the base body 4 of the fire detector M in the region of the smoke inlet opening OF.
  • the six light guides 8 protrude slightly, for example in the range of 1 mm to 10 mm, out of the main body 4.
  • the light guides 8 are preferably made of a rod-shaped, cylindrical plastic which is transparent to light in the wave range of the light emitted by the light emitters 1.
  • the respective end piece 14 which projects through the base body 4 into the region of the smoke inlet opening OF, forms an optical lens or an optical prism.
  • the geometric design of the respective end piece 14 is preferably carried out depending on whether the light guide 8 is used for the light extraction or for the light coupling.
  • the respective end piece 14 may be such that two light bundles L1, L2, as in FIG FIG. 1 shown to be sent out.
  • the optical fibers 8 connected upstream of the light receivers 2 are such that light is present in a predetermined reception region EB, as exemplified in FIG FIG. 2 shown, can be detected.
  • the use of optical fibers 8 advantageously allows a simple mechanical construction of the fire detector M.
  • the light emitter 1 and / or the light receiver 2 can also be arranged directly in the area of the smoke inlet opening OF. These can be preceded by an optical means for the light extraction or for the light coupling, such as an optical lens and / or an optical prism and / or a diaphragm.
  • the corresponding electrical connections are then preferably with the circuit carrier 6 and via this with the evaluation unit 7 for the electrical control of the light transmitter 1 and for detecting the respective electrical signals from the light receivers 2 connected.
  • FIG. 4 shows a side view of a fire detector according to the invention M according to a first embodiment.
  • the optical fibers 8 connected downstream of the light transmitters 1 are at the same time also part of a connecting web 9 which mechanically connects the main body 4 to the detector cap 5.
  • the associated end piece 14 of the light guide 8 and the connecting web 9 is designed as a prism, which is arranged at a 45 ° angle with respect to the incident light beam of the light emitter 1.
  • the light beam L is deflected by 90 ° and directed into the monitored area of the smoke inlet opening OF.
  • the inclined by 45 ° surface of the end piece 14 or the adjoining part of the connecting web 9 may also be mirrored.
  • the light guides 8, which are connected upstream of the light receivers 2, part of such a connecting web 9 may be.
  • FIG. 5 shows an example of a Lichteinkopplung invention and light extraction in the region of a smoke inlet opening OF by means of a common light guide. 8
  • Reference numeral 10 designates a light-emitting receiver as a structural unit which comprises a light transmitter 1 and a light receiver 2.
  • the light-emitting receiver 10 is in turn arranged on a circuit carrier 6 in the main body 4 of the fire detector M.
  • Light emitter 1 and light receiver 2 are arranged by way of example in a backward lattice arrangement with a scattered light angle of 180 °.
  • the light-emitting receiver 10, a light guide 8 is connected downstream, which is provided both for light coupling and for light extraction.
  • the light guide 8 is passed through a recess 8 in the base body 4 in the region of the smoke inlet opening OF.
  • the end piece 14 protruding into this region is such that a light bundle L emitted by the light transmitter 1 is deflected into the region of the smoke inlet opening OF is and that stray light from this area can be coupled in the reverse manner for detection by the light receiver 2 again.
  • B denotes a diaphragm which greatly reduces crosstalk of emitted light of the light transmitter 1 directly to the light receiver 2.
  • the fire detector M has a plurality of such light-emitting receiver 10 distributed in the circumferential direction in the region of the smoke inlet opening OF.
  • FIG. 6 shows a side view of a fire detector according to the invention M according to a second embodiment.
  • a respective light receiver 2 ' is attached to the detector cap 5 of the fire detector M adjacent to the smoke inlet opening OF.
  • this light receiver 2 ' is also scattered light S in the event of contamination V detectable.

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Claims (10)

  1. Détecteur d'incendie, en particulier détecteur de fumée optique, le détecteur d'incendie présentant un boîtier de détecteur (3) avec ouverture d'entrée de la fumée (OF), une unité de détection (DET) située dans le boîtier de détecteur (3) et servant à la détection de grandeurs caractéristiques spécifiques, une unité d'évaluation (7) pour le déclenchement d'une alarme incendie (AL) et au moins un émetteur de lumière (1) et récepteur de lumière (2) raccordés à l'unité d'évaluation (7) destinés à la surveillance de l'ouverture d'entrée de la fumée (OF) pour un encrassement interdit (v), caractérisé en ce que
    - l'émetteur de lumière (1) et le récepteur de lumière (2) sont situés dans un ordre de lumière diffusée, un volume de lumière diffusée (SV) fixé par l'agencement de lumière diffusée se situant dans une zone propice aux encrassements (V) de l'ouverture d'entrée de la fumée (OF),
    - l'émetteur de lumière (1) étant installé et orienté de telle sorte qu'une première partie (D) d'un faisceau de lumière (L) émis traverse la zone d'ouverture d'entrée de la fumée (OF), sans toucher de parties de boîtier (4, 5, 8, N) adjacentes, et/ou
    - en ce que l'émetteur de lumière (1) est installée et orienté de manière qu'une deuxième partie (A) du faisceau de lumière (L) rencontre une pièce de boîtier (4, 5, 8, N) jouxtant l'ouverture d'entrée de la fumée (OF), la surface de la pièce de boîtier (4, 5, 8, N) étant constituée et orientée de manière que la deuxième partie (A) du faisceau de lumière (L) s'y rencontrant est déviée loin du récepteur de lumière (2) ou y est absorbée, et
    - en ce qu'au moyen de l'unité d'évaluation (7), une note de service (WARN) peut être émise dans le cas où la lumière diffusée (S) interceptée par le récepteur de lumière (2) dépasse une valeur minimale.
  2. Détecteur d'incendie selon la revendication 1, le boîtier de détecteur (3) étant essentiellement symétriquement réalisé et présentant un axe de symétrie (Z), plusieurs émetteurs de lumière (1) et récepteurs de lumière (2) étant disposés répartis dans le sens périphérique autour de l'axe de symétrie (Z) dans un agencement de lumière diffusée respectif dans la zone de l'ouverture d'entrée de la fumée (OF).
  3. Détecteur d'incendie selon la revendication 1 ou 2, un émetteur de lumière (1) respectif et un récepteur de lumière (2) respectif étant situés dans un agencement de diffusion en avant avec un angle de lumière diffusée (α) dans la plage allant de 20° à 80°.
  4. Détecteur d'incendie selon la revendication 1 ou 2, un émetteur de lumière (1) respectif et un récepteur de lumière (2) respectif étant situés dans un agencement de diffusion en arrière avec un angle de lumière diffusée (α) dans la plage allant de 110° à 150°.
  5. Détecteur d'incendie selon la revendication 1 ou 2, un émetteur de lumière (1) respectif et un récepteur de lumière (2) respectif étant réunis en un émetteur-récepteur de lumière (10) et étant situés dans un agencement de diffusion en arrière avec un angle de lumière diffusée (α) dans la plage allant de 150° à 180°.
  6. Détecteur d'incendie selon l'une des revendications précédentes, la partie de boîtier (4, 5, 8, N) dans la zone de l'ouverture d'entrée de la fumée (OF) étant un corps de base (4) ou le cache-détecteur (5) du boîtier de détecteur (3), une protection anti-insectes (N) ou une nervure de raccord (9) entre le corps de base (4) et le cache-détecteur (5).
  7. Détecteur d'incendie selon l'une des revendications 1 à 6, un émetteur de lumière (1) respectif, un récepteur de lumière (2) respectif et/ou un émetteur-récepteur de lumière (10) respectif étant situé sur un support de commutation (6) à l'intérieur du boîtier de détecteur (3), un guide de lumière (8) étant placé en amont de l'émetteur de lumière (1), du récepteur de lumière (2) et/ou de l'émetteur-récepteur de lumière (10) respectifs et une pièce d'extrémité (14) opposée du guide de lumière (8) respectif passant par le boîtier de détecteur (3, 4) pour l'extraction de lumière et/ou l'injection de lumière dans la zone de l'ouverture d'entrée de la fumée (OF).
  8. Détecteur d'incendie selon l'une des revendications 1 à 6, un émetteur de lumière (1) respectif étant situé sur un support de commutation (6) dans le boîtier de détecteur (3), un guide de lumière (8) étant placé en amont de l'émetteur de lumière (1) respectif, une pièce d'extrémité (14) opposée du guide de lumière (8) respectif passant par le boîtier de détecteur (3, 4) jusqu'à l'extraction de lumière dans la zone de l'ouverture d'entrée de la fumée (OF) et le récepteur de lumière (2') respectif étant situé au cache-détecteur (5) dans la zone de l'ouverture d'entrée de la fumée (OF).
  9. Détecteur d'incendie selon la revendication 7 ou 8, la pièce d'extrémité (14) respective d'un guide de lumière (8) formant une lentille optique et/ou un prisme optique.
  10. Détecteur d'incendie selon l'une des revendications 7 à 9, le guide de lumière (8) respectif faisant en même temps partie d'une nervure de raccord (9) entre un corps de base (4) et le cache-détecteur (5) du boîtier de détecteur (3).
EP16703995.7A 2015-03-23 2016-02-12 Détecteur d'incendie présentant un dispositif de lumière diffusée au niveau d'une ouverture d'entrée de fumée en vue de la surveillance de l'encrassement Active EP3274975B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP15160271.1A EP3073458A1 (fr) 2015-03-23 2015-03-23 Dispositif d'alerte d'incendie doté d'un agencement à écran diffusant dans la zone d'un orifice d'entrée de fumée destiné à la surveillance de l'encrassement
PCT/EP2016/052961 WO2016150613A1 (fr) 2015-03-23 2016-02-12 Détecteur d'incendie présentant un dispositif de lumière diffusée au niveau d'une ouverture d'entrée de fumée en vue de la surveillance de l'encrassement

Publications (2)

Publication Number Publication Date
EP3274975A1 EP3274975A1 (fr) 2018-01-31
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EP15160271.1A Withdrawn EP3073458A1 (fr) 2015-03-23 2015-03-23 Dispositif d'alerte d'incendie doté d'un agencement à écran diffusant dans la zone d'un orifice d'entrée de fumée destiné à la surveillance de l'encrassement
EP16703995.7A Active EP3274975B1 (fr) 2015-03-23 2016-02-12 Détecteur d'incendie présentant un dispositif de lumière diffusée au niveau d'une ouverture d'entrée de fumée en vue de la surveillance de l'encrassement

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Publication number Publication date
CN107646129B (zh) 2019-12-24
US10573167B2 (en) 2020-02-25
WO2016150613A1 (fr) 2016-09-29
US20180061215A1 (en) 2018-03-01
EP3073458A1 (fr) 2016-09-28
CN107646129A (zh) 2018-01-30
EP3274975A1 (fr) 2018-01-31

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