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EP3128493A1 - Detecteur de fumee a ecran diffusant dote d'une chambre de mesure optique logee dans le boitier de detecteur et d'une surface reflechissante sur un cote interieur d'un capot de detecteur en tant que partie du boitier de detecteur - Google Patents

Detecteur de fumee a ecran diffusant dote d'une chambre de mesure optique logee dans le boitier de detecteur et d'une surface reflechissante sur un cote interieur d'un capot de detecteur en tant que partie du boitier de detecteur Download PDF

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Publication number
EP3128493A1
EP3128493A1 EP15180045.5A EP15180045A EP3128493A1 EP 3128493 A1 EP3128493 A1 EP 3128493A1 EP 15180045 A EP15180045 A EP 15180045A EP 3128493 A1 EP3128493 A1 EP 3128493A1
Authority
EP
European Patent Office
Prior art keywords
light
detector
emitting diode
scattered light
hood
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.)
Withdrawn
Application number
EP15180045.5A
Other languages
German (de)
English (en)
Inventor
Aleksandar Duric
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
Original Assignee
Siemens Schweiz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Schweiz AG filed Critical Siemens Schweiz AG
Priority to EP15180045.5A priority Critical patent/EP3128493A1/fr
Priority to CN201680046315.7A priority patent/CN107851355B/zh
Priority to PCT/EP2016/067794 priority patent/WO2017021217A1/fr
Priority to EP16745687.0A priority patent/EP3332395B1/fr
Publication of EP3128493A1 publication Critical patent/EP3128493A1/fr
Withdrawn legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to a scattered light smoke detector having an optical measuring chamber communicating with the ambient air.
  • the measuring chamber is housed inside a detector housing and limited by a base body and by a detector hood of the detector housing.
  • the main body and the detector hood can also be one-piece. Both are preferably a Kunststoffspritzgrussteil.
  • a preferably planar circuit carrier is accommodated, on which, adjacent to the measuring chamber, a light-emitting diode and a photosensor, such as e.g. a photodiode, are arranged in a scattered light arrangement.
  • Such scattered light smoke detectors are well known. Like the scattered-light smoke detector according to the invention, they can be designed for connection to a detector bus or to a detector line. In the case of a detected minimum smoke concentration, an alarm or warning message is output to the detector bus. The alarm or warning message can be issued optically and / or acoustically alternatively or additionally via radio and / or on the scattered light smoke detector.
  • the considered scattered light smoke detectors designed as point detectors can alternatively or additionally be designed for a battery-supported stand-alone operation.
  • the light-emitting diode and the photosensor each have an optical axis extending at least approximately orthogonally to the circuit carrier. In other words, the two optical axes run at least almost parallel to one another.
  • the light-emitting diode and the photosensor are located opposite an inner side of the detector hood which delimits the measuring chamber.
  • a part of the inside has at least one mirror surface, which is opposite to the light-emitting diode.
  • the mirror surface has a mirror geometry such that a light cone of the light-emitting diode intersects a reception region of the photosensor in a scattered light volume within the measurement chamber.
  • the mirror surface may have a plane or a concave surface. It may be a silvery foil or a piece of metal sheet, e.g. made of aluminum or steel.
  • the film can be glued to the inside of the detector hood.
  • the sheet metal piece may be on the inside of the detector hood, e.g. glued or attached during injection molding of the detector hood with.
  • the mirror surface may also be a metallized surface, e.g. applied by means of a vapor deposition in a vacuum.
  • the mirror surface may also be a plastic mirror having a glossy or polished surface, such as e.g. made of black plastic.
  • the circuit carrier is preferably a planar printed circuit board.
  • this has, at least on one of the two circuit carrier side contacting surfaces for surface mounting, i. for a so-called SMD mounting on.
  • the essence of the invention lies in the use of the inside of the detector hood as a mirror or as a reflector to direct the emitted from the light emitting diode orthogonal to the circuit carrier light beam through a central region in the interior of the detector housing.
  • At least one aperture and / or at least one light trap and / or light-absorbing structures are arranged on the circuit carrier.
  • a one-piece cover with recesses for at least the light-emitting diode and for the photosensor is mounted on the circuit carrier.
  • the cover has or forms the at least one diaphragm and / or light trap and / or light-absorbing structures.
  • the cover covers substantially all of the inner side of the detector cover opposite the upper side of the circuit carrier and thus forms the bottom of the optical measuring chamber except for the aforementioned recesses.
  • the cover is in particular a black plastic injection molded part.
  • the at least one aperture is formed as sharp as possible, so that only little light falls on such an edge and is reflected.
  • the light traps are preferably pot-shaped or funnel-shaped. With regard to the main direction of incidence of the light rays from the light-emitting diode, they have geometrically oriented surfaces and / or corrugations in such a way that the light rays incident there "dead-end" after a few reflections. The majority of the remaining top of the cover is preferably grooved.
  • the surfaces of the diaphragm (s) and / or the light trap (s) and / or the corrugated surfaces or the corrugations are preferably formed shiny and act like black mirrors. This has the advantage that incident light is not diffusely scattered, but reflected reflected.
  • the inner side of the signaling hood also has corrugations as light-absorbing structures except for the mirror surface (s), in particular shiny black corrugations. It may also have on its inside a light-absorbing paint layer, e.g. a black color layer.
  • the optical measuring chamber is thus formed by the adjacent cover on the circuit carrier and by the opposite inner side of the detector hood.
  • This can advantageously be dispensed with a pot-shaped lid, which is usually plugged onto the floor or on the cover of the optical measuring chamber.
  • a labyrinth Such an arrangement is also referred to as a labyrinth.
  • labyrinth typically cylindrically designed labyrinth usually has lamellae as Lichtabpressieri on the radially outer periphery. The latter are designed such that they allow the passage of smoke particles to be detected into the interior of the labyrinth, but shield the interior of the labyrinth against direct ambient light.
  • such light shielding elements are integral parts of the cover for the circuit carrier. They can be molded there as a plastic part.
  • the light shielding elements may alternatively be integrated in the detector hood or in the main body.
  • the detector housing with the detector hood on an essentially rotationally symmetrical or mirror-image outer contour is essentially rotationally symmetrical or mirror-image outer contour. This allows a largely direction-independent smoke detection.
  • the detector hood has a convex outer contour and an at least partially concave inner contour. It has the respective mirror surface on the inside of the detector hood on one of the at least partially concave inner contour of the detector hood following mirror geometry.
  • the mirror surface may comprise a concave portion of the surface of a sphere, an ellipsoid, a paraboloid, or a hyperboloid. From the convex outer contour follows a geometrically corresponding concave inner contour of the mirror surface, provided that the wall thickness of the detector hood remains essentially unchanged.
  • the concave inner contour advantageously makes it possible to focus the incident light beam emitted by the opposite light-emitting diode.
  • the photosensor is arranged centrally in the detector housing, so that the scattered light volume formed in the interior of the detector housing encloses a constructive main axis extending through the center of the scattered light smoke detector. This advantageously allows a largely direction-independent smoke detection.
  • a respective mirror surface lying opposite the light-emitting diode has a mirror geometry such that the light cone of the light-emitting diode, after its reflection, virtually passes without contact through the interior of the detector housing to the measuring chamber and opens into a light-absorbing light trap.
  • At least one further light-emitting diode with an optical axis orthogonal to the circuit carrier is arranged on the circuit carrier.
  • the optical axes of the three optoelectronic components run at least almost parallel to one another.
  • At least one of the at least one further light-emitting diode is arranged adjacent to the first light-emitting diode.
  • the at least one further light-emitting diode with the first light-emitting diode forms a two-color or multi-color light-emitting diode as a one-piece optoelectronic component.
  • the at least one further light-emitting diode of the mirror surface of the first light-emitting diode lies opposite.
  • the light emitted by the respective light-emitting diodes has a mutually different wavelength.
  • the color-specific evaluation of the photosensor signal makes it possible to carry out a fire technical analysis of the detected smoke particles with regard to their particle size.
  • the first light-emitting diode is preferably a (monochrome) red light-emitting diode or a (monochrome) infrared light-emitting diode with a light wavelength of 940 ⁇ 70 nm.
  • the second light-emitting diode is preferably a (monochrome) blue light-emitting diode with a light wavelength of 470 ⁇ 70 nm or ( monochrome) UV light emitting diode in the UV-A range.
  • the first and second light-emitting diode can be combined to form a two-color light-emitting diode.
  • Such a light-emitting diode is also referred to as a dual LED or duo LED. In essence, both light-emitting diodes have an approximately identical optical axis, so that advantageously no further mirror surface is required on the inside of the detector hood.
  • the smoke detector has an electronic control unit, in particular a microcontroller.
  • the control unit is connected to the respective light emitting diode and the photosensor, in particular signal or data technology.
  • the control unit emits a fire alarm if a sensor signal assigned to the respective light-emitting diode exceeds a scattered light limit value or a combined scattered light limit value.
  • the microcontroller is further configured to drive the LEDs alternately at least indirectly and in the case of a plurality of light emitting diodes, and to evaluate the corresponding photosensor signal in a temporally assigned manner.
  • a thermal radiation sensor which is sensitive in a contactless manner for heat radiation in the mid-infrared region (MIR) is accommodated in the detector housing.
  • MIR mid-infrared region
  • the heat radiation sensor is in particular a thermopile or a bolometer. More commonplace in the jargon is the English term "Thermopile" for a thermopile.
  • Such heat radiation sensors give i.Vgl. to pyrosensors that spend only one signal on heat radiation changes, also a sensor signal with constant heat radiation according to their intensity.
  • the heat radiation sensor is further aligned according to the invention optically to a central region on the inside of the detector hood for detecting a local housing temperature, which essentially follows the ambient temperature in the immediate vicinity of the scattered light smoke detector.
  • the central region typically comprises the geometric main axis or the axis of rotational symmetry of the scattered light smoke detector. It is also in the optical detection range of the heat radiation sensor.
  • the entire detector housing including the detector hood is also designed to be light-tight, so that no appreciable light, neither in the visible range, in the UV range nor in the near and middle infrared range passes through the detector housing.
  • the detected heat radiation is directly related to the temperature on the inside of the detector hood, which follows the actual ambient temperature with a small, justifiable delay.
  • the central area of the detector hood usually warms up quickly when the ceiling is installed as intended.
  • the wall thickness of the detector hood be dimensioned such that the prevailing on the outside of the detector hood ambient temperature by the heat-conducting material property of the detector hood with a time constant of less than 30 s, in particular less than 10 s follows.
  • the housing part has a wall thickness in the range of 1 to 2 mm, so that a time constant for the heat transfer from the outside to the inside in the central region of the detector hood of less than 10 seconds is possible.
  • the control unit is also connected to the heat radiation sensor and configured to derive mathematically from a thermal sensor signal output from the heat radiation sensor, a temperature corresponding to the ambient temperature and to take this into account when issuing the fire alarm. In this case, an excessively high temperature value can be used to check the plausibility of detected smoke in an open fire.
  • a fire alarm may also be issued by the control unit if there is an open fire without smoke, such as in a fire with alcohol, but the ambient temperature is too high, such as greater than 65 ° Celsius.
  • the control unit is set up to determine the temperature value according to the pyrometric measuring principle taking into account a stored emissivity.
  • the emissivity depends on the surface condition and / or the material of the detector hood as well as on the wavelength of the emitted heat radiation.
  • the emissivity in the mid-infrared range preferably has a value of at least 0.8, preferably of at least 0.9. This can e.g. be achieved by a black plastic or by a black paint in the central area of the inside of the detector hood.
  • the emissivity can e.g. be measured by a sample test.
  • the detector hood comprises a housing part, which comprises at least the central area of the detector hood.
  • This housing part is preferably integrated in the detector hood.
  • this housing part is only permeable to heat radiation in the mid-infrared range.
  • the remaining housing parts are preferably designed to be light-tight, so that no appreciable light, neither in the visible range, in the UV range nor in the near and middle infrared range passes through the remaining detector housing.
  • the material of the central housing part may be, for example, a plastic, such as a thermoplastic Plastic based on polymethyl methacrylate or polycarbonate or a ceramic, such as transparent fine crystalline spinel ceramics based on magnesium and aluminum oxide. In particular, this material then appears in the optically visible region as opaque, in particular as opaque or white-opaque.
  • the scattered light detector thus has a housing or a detector hood, which appears to a viewer as a conventional fire alarm.
  • control unit is connected to the heat radiation sensor and adapted to monitor a heat sensor signal emitted by the heat radiation sensor for the occurrence of significant fluctuations or flicker frequencies for open fire and blazing embers and to take into account in the output of the fire alarm.
  • the frequency-technical monitoring may e.g. by means of digital filters or by means of a digital Fourier analysis (FFT, DFT).
  • a fire alarm can be issued immediately when a detected open fire before the resulting smoke particles reach the optical measuring chamber. The alarm is thus faster.
  • control unit may additionally be set up to derive a temperature value corresponding to the ambient temperature from a direct component of the heat sensor signal, and likewise to take this into consideration when outputting the fire alarm.
  • two characteristic fire parameters can advantageously be detected by means of only one heat radiation sensor.
  • a separate further component for the temperature detection in the environment of the hazard alarm can be omitted.
  • the housing part permeable only to thermal radiation forms an optical lens Expansion of the optical detection range of the heat radiation sensor.
  • FIG. 1 shows a first embodiment of the scattered light smoke detector 1 with a mirror surface S according to the invention.
  • the scattered light smoke detector 1 shown has a detector housing 2, which is composed of a base body 3 and a detector hood 4.
  • the detector 1 is mounted with its connection side AN to a detector base, not shown further, which is typically attached to the ceiling.
  • Between body 3 and detector hood 4 are openings OF formed so that smoke particles can pass through them in the interior IR of the detector housing 2 for optical smoke detection.
  • further light shielding elements in the form of lamellae LAM are present, which allow the smoke particles to pass through, but shield direct ambient light (s. FIG. 6 ).
  • an optical measuring chamber is accommodated or formed in the interior IR of the detector housing 2, which is bounded by the base body 3 and by the detector hood 4.
  • a circuit substrate 7 is accommodated, on which, adjacent to the measuring chamber, a light-emitting diode 5 and a photosensor 6 are arranged in a scattered-light arrangement. In such an arrangement, no direct light from the light emitting diode 5 to the photosensor reaches 6.
  • Both light emitting diode 5 and photosensor 6 are arranged on the flat circuit substrate 7, that their optical axes A orthogonal or nearly orthogonal to the circuit substrate 7 and thus parallel to each other.
  • the light-emitting diode 5 and the photosensor 6 are SMD components which can be applied with high precision and automatically on a circuit carrier 7 with contact areas provided for this purpose.
  • the light-emitting diode 5 and the photosensor 6 lie directly opposite an inner side IS of the detector hood 4, the inner side defining the optical measuring chamber.
  • the light-emitting diode 5 illuminates the inside IS of the detector hood 4 directly. It lacks in comparison to the prior art, a labyrinth lid, which would otherwise be located between LED 5 and photosensor 6 on the one hand and between the inside IS of the detector hood 4 on the other hand.
  • a part of the inside IS of the detector hood 4 has a mirror surface S, which is opposite to the light-emitting diode 5.
  • the mirror surface S is dimensioned such that the light cone R, B emitted by the light-emitting diode 5 is completely exposed to the light cone Mirror surface S hits.
  • the mirror surface S has a mirror geometry such that the light cone R, B intersects a reception region E of the photosensor 6 in a scattered light volume Z within the optical measuring chamber. In this case, scattered light passes only from particles in this scattered light volume for detection by the photosensor 6.
  • the receiving area E is a receiving cone.
  • apertures BL, a light trap LF and light-absorbing structures AB in the form of corrugations for minimizing the fundamental pulse in the optical measuring chamber are furthermore provided.
  • the aforementioned structural elements BL, LF, AB are integral elements of a glossy black plastic cover 8, which is provided for covering or attachment to the circuit substrate 7 and forms, so to speak, the bottom of the optical measuring chamber.
  • the cover 8 is in the example a one-piece plastic injection molded part. This part can also be inseparably composed of several plastic parts. In the cover 8, two recesses in the form of openings for the light emitting diode 5 and for the photosensor 6 are still present.
  • the inner side IS of the detector hood 4 also has light-absorbing structures AB, such as e.g. in the form of corrugations or fluted surfaces (not shown).
  • the exception is the mirror surface S, which is e.g. by an attached specular piece of sheet metal or by vapor-deposited metal, e.g. Aluminum, can be realized.
  • the scattered light smoke detector 1 shown also has a substantially rotationally symmetrical or mirror-image outer contour.
  • SA the constructive main axis or axis of symmetry is drawn for this purpose.
  • the detector hood 4 has a convex outer contour on its outer side AS.
  • the detector hood 4 has an approximately equal wall thickness in the range of 1 to 2 mm, so that the detector hood 4 forms on its inner side IS a constructively corresponding convex inner contour.
  • This contour is roughly the mirror geometry of the mirror surface S.
  • the resulting Concave mirror geometry can be used advantageously for focusing and focusing the emitted light cone. In other words, a desired advantageous mirror geometry can be achieved via a suitably selected outer contour of the detector hood.
  • the mirror surface S has such a mirror geometry that the light cone R, B of the light-emitting diode 5 after its reflection virtually non-contact the interior IR of the detector housing 2 with the optical measuring chamber and flows into the light-absorbing light trap LF. The incident there, not scattered smoke particles light is effectively absorbed there.
  • the scattered light smoke detector shown has an electronic control unit 10 for controlling and evaluating the optoelectronic components 5, 6 and for outputting an alarm message.
  • This is preferably a microcontroller and applied to the circuit substrate 7.
  • the control unit 10 is programmatically configured to actuate the light-emitting diode 5 at least indirectly pulsed and to evaluate a corresponding sensor signal originating from the photosensor 6. If the sensor signal exceeds a scattered light limit, an alarm message is output.
  • the light-emitting diode 5 shown can be a red-emitting LED, an infrared LED, a blue-emitting LED or a UV LED.
  • R denotes a red cone of light or a red light bundle
  • B denotes a blue cone of light or a blue light bundle.
  • the light-emitting diode 5 may also be a dual LED 50 or a multi-color LED, such as an RGB LED.
  • FIG. 2 shows a second embodiment with two mirror surfaces S1, S2.
  • a second mirror surface S2 is provided, which is opposite to the photosensor 6 and which has a mirror geometry such that the original first scattered light center Z1 (without second mirror surface S2) can be expanded by the second scattered light center Z2.
  • the first and second scattered light centers Z1, Z2 can partially overlap.
  • FIG. 3 shows a third embodiment with a heat radiation sensor 9 for detecting an ambient temperature T according to the invention.
  • the photosensor 6 is now arranged centrally in the detector housing 2 on the circuit carrier 7.
  • the scattered light volume Z formed in the interior IR of the detector housing 2 now encloses the constructive main axis SA or symmetry axis extending the center of the smoke detector 1.
  • Smoke detection is equally fast regardless of the direction of the smoke entering the optical measuring chamber.
  • the cover 8 forms by way of example yet another light trap LF.
  • a heat-radiation sensor 9 which is sensitive to heat radiation in the mid-infrared range and is in the form of a thermopile, likewise designed as an SMD component, is received in detector housing 2 in the form of a contactless device.
  • the heat radiation sensor 9, like the photosensor 6, is arranged centrally and on the circuit carrier 7. With W, the heat-optical conical detection range of the heat radiation sensor 9 is designated.
  • the detection range W defines a (virtual) measurement surface MF on the inside IS of the detector hood 4 for detecting a housing temperature there. In other words, the heat radiation sensor 9 detects the heat radiation emitted by this measurement surface MF in the direction of the heat radiation sensor 9.
  • the temperature prevailing at the measuring surface can then be derived, which is essentially the ambient temperature T in the immediate vicinity of the scattered light smoke detector 1 follows. Temperature changes, such as in a fire, are the fastest detectable at the lower vertex SP. Through this point SP also runs the constructive main axis SA of the scattered light smoke detector 1. This is thus the measuring surface MF opposite.
  • the ambient temperature T is due to the thin housing wall of the detector hood 4 after a short time, such as after 10 s, on the inside IS on the measuring surface MF on. For temporal acceleration, the detector hood 4 in the region of the measuring surface MF have a particularly good heat-conducting plastic or a piece of metal, such as copper.
  • the heat radiation sensor 9 is connected on the output side to the control unit 10, which then mathematically derives a temperature value corresponding to the ambient temperature T from a heat sensor signal output by the heat radiation sensor 9 and takes this into consideration in the output of the fire alarm.
  • FIG. 4 shows a fourth embodiment with two mirror surfaces S1, S2 and two stray light arrangements according to the invention.
  • the wall thickness of the detector hood 4 is significantly larger than in the example of the preceding figures.
  • the mirror geometry, in particular of the second mirror surface S2 can additionally be specifically adapted to the specification by the outer contour of the detector hood 4 in order to specifically focus the light beam emitted by the opposite light-emitting diode 52 or the light cone B into the light trap LF.
  • the second mirror surface S2 is partially embedded or recessed in the detector hood 4.
  • both LEDs 51, 52 may be of the same type, such as infrared LEDs. From the respective registered the same color scattered light from different scattered light angles, a determination of the type of smoke is possible.
  • FIG. 5 shows a fifth embodiment with a heat radiation sensor 9 for detecting an ambient temperature T and for detecting open fire in the sense of a flame detector according to the invention.
  • a heat radiation sensor 9 for detecting an ambient temperature T and for detecting open fire in the sense of a flame detector according to the invention.
  • the detector hood 4 in the central region MF, ie in the region of the measuring surface, according to the invention, a transparent only for heat radiation in the mid-infrared region housing part 11. This can be such that it does not differ visually from the remaining detector housing 2.
  • the housing part 11 additionally forms an optical lens for widening the optical detection area W.
  • the control unit 10 is configured to monitor the heat sensor signal outputted from the heat radiation sensor 9 for the occurrence of significant fluctuations or flicker frequencies for open fire and blazing fire in terms of a flame detector and to take into account in the output of the fire alarm.
  • control unit 10 may be configured to derive from a DC component of the heat sensor signal by calculation a temperature value corresponding to the ambient temperature T and also to take this also into consideration when outputting the fire alarm.
  • all the components 5, 6, 10 shown are arranged on a circuit carrier side opposite the cover 8. For the light emitting diode 5 and for the photosensor 6 corresponding through hole DO in the circuit substrate 7 are present.
  • FIG. 6 finally shows a plan view of the embodiment FIG. 5 along the line VI marked there. In this view, especially the lamellae LAM as Lichtabpressieri and the central arrangement of the photosensor 6 and heat radiation sensor 9 can be seen.
  • the FIG. 6 also shows the substantially rotationally symmetrical housing shape of the scattered light smoke detector 1. Also well visible are the large-area light-absorbing structures AB of the plastic cover 8 on the circuit substrate. 7

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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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
EP15180045.5A 2015-08-06 2015-08-06 Detecteur de fumee a ecran diffusant dote d'une chambre de mesure optique logee dans le boitier de detecteur et d'une surface reflechissante sur un cote interieur d'un capot de detecteur en tant que partie du boitier de detecteur Withdrawn EP3128493A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15180045.5A EP3128493A1 (fr) 2015-08-06 2015-08-06 Detecteur de fumee a ecran diffusant dote d'une chambre de mesure optique logee dans le boitier de detecteur et d'une surface reflechissante sur un cote interieur d'un capot de detecteur en tant que partie du boitier de detecteur
CN201680046315.7A CN107851355B (zh) 2015-08-06 2016-07-26 有报警器壳体中的光学测量腔和是该壳体一部分在报警器罩内侧处镜面的散射光烟雾报警器
PCT/EP2016/067794 WO2017021217A1 (fr) 2015-08-06 2016-07-26 Détecteur de fumée à dispersion de lumière pourvu d'une chambre de mesure optique ménagée dans le boîtier du détecteur et d'une surface réfléchissante prévue sur un côté intérieur d'un capot de détecteur faisant partie du boîtier de detecteur
EP16745687.0A EP3332395B1 (fr) 2015-08-06 2016-07-26 Détecteur de fumée à dispersion de lumière pourvu d'une chambre de mesure optique ménagée dans le boîtier du détecteur et d'une surface réfléchissante prévue sur un côté intérieur d'un capot de détecteur faisant partie du boîtier de detecteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15180045.5A EP3128493A1 (fr) 2015-08-06 2015-08-06 Detecteur de fumee a ecran diffusant dote d'une chambre de mesure optique logee dans le boitier de detecteur et d'une surface reflechissante sur un cote interieur d'un capot de detecteur en tant que partie du boitier de detecteur

Publications (1)

Publication Number Publication Date
EP3128493A1 true EP3128493A1 (fr) 2017-02-08

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EP15180045.5A Withdrawn EP3128493A1 (fr) 2015-08-06 2015-08-06 Detecteur de fumee a ecran diffusant dote d'une chambre de mesure optique logee dans le boitier de detecteur et d'une surface reflechissante sur un cote interieur d'un capot de detecteur en tant que partie du boitier de detecteur
EP16745687.0A Active EP3332395B1 (fr) 2015-08-06 2016-07-26 Détecteur de fumée à dispersion de lumière pourvu d'une chambre de mesure optique ménagée dans le boîtier du détecteur et d'une surface réfléchissante prévue sur un côté intérieur d'un capot de détecteur faisant partie du boîtier de detecteur

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP16745687.0A Active EP3332395B1 (fr) 2015-08-06 2016-07-26 Détecteur de fumée à dispersion de lumière pourvu d'une chambre de mesure optique ménagée dans le boîtier du détecteur et d'une surface réfléchissante prévue sur un côté intérieur d'un capot de détecteur faisant partie du boîtier de detecteur

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EP (2) EP3128493A1 (fr)
CN (1) CN107851355B (fr)
WO (1) WO2017021217A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2021115728A1 (fr) * 2019-12-10 2021-06-17 Siemens Schweiz Ag Unité de détection de fumée pour une alarme incendie à suppression d'impulsions de base, et procédé approprié de détection de fumée

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11788942B2 (en) 2017-12-15 2023-10-17 Analog Devices, Inc. Compact optical smoke detector system and apparatus
US10809173B2 (en) 2017-12-15 2020-10-20 Analog Devices, Inc. Smoke detector chamber boundary surfaces
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EP3332395A1 (fr) 2018-06-13
CN107851355B (zh) 2020-03-17
WO2017021217A1 (fr) 2017-02-09
EP3332395B1 (fr) 2019-05-22

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