EP3332395A1 - Streulichtrauchmelder mit einer im meldergehäuse aufgenommenen optischen messkammer und mit einer spiegelfläche an einer innenseite einer melderhaube als teil des meldergehäuses - Google Patents
Streulichtrauchmelder mit einer im meldergehäuse aufgenommenen optischen messkammer und mit einer spiegelfläche an einer innenseite einer melderhaube als teil des meldergehäusesInfo
- Publication number
- EP3332395A1 EP3332395A1 EP16745687.0A EP16745687A EP3332395A1 EP 3332395 A1 EP3332395 A1 EP 3332395A1 EP 16745687 A EP16745687 A EP 16745687A EP 3332395 A1 EP3332395 A1 EP 3332395A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- detector
- emitting diode
- scattered light
- heat radiation
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
- Scattered light smoke detector with an optical measuring chamber accommodated in the detector housing and with a mirror surface on an inner side of a detector hood as part of the detector housing
- 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 preferential ⁇ 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 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 concentration of smoke, 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 object is ge ⁇ dissolves with the objects of the main claim.
- Advantageous embodiments of the present invention are indicated in the dependent claims.
- 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 such a mirror geometry that a Lichtke ⁇ gel the light emitting diode intersects a receiving area of the photo sensor in a light scattering volume within the measuring chamber and that the light cone by its reflection (virtually) free of contact) the interior of the detector body crosses with the measuring chamber, and light-absorbing in a Light ⁇ trap opens.
- the mirror surface may have a plane or a concave surface. It may be a silvery foil or a sheet metal piece, such as aluminum or steel.
- the film can be glued to the inside of the detector hood.
- the piece of sheet metal can be glued to the inside of the detector hood, for example, or attached during injection molding of the detector hood.
- the mirror surface can also be a metallized surface which is applied, for example by means of a vapor deposition in a vacuum.
- the mirror surface can also be a plastic ⁇ mirror with a shiny or polished surface such as black plastic.
- the circuit carrier is preferably a planarnatit ⁇ te.
- it has contacting surfaces for surface mounting, ie for a so-called SMD assembly, at least on one of the two circuit carrier sides.
- 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.
- focusing and targeted steering of the light beam is also advantageously an effective directional introduction of the light beam in the designated light trap with ei ⁇ ner almost complete absorption of light possible.
- virtual non-contact is meant that the mirrored light beam, apart from isolated marginal rays of the light beam, completely opens into the light trap, without first touching other parts of the 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 mounted at least for the light emitting diode and the photosensor on the circuit substrate.
- the cover has at least ei ⁇ ne aperture and / or light trap and / or light-absorbing structures or formed from these.
- the cover covers up to the aforementioned recesses substantially all of, the inside of the detector cover against ⁇ opposite upper side of the circuit carrier and therefore forms the bottom of the optical measurement chamber.
- the cover is in particular a black plastic injection-molded part.
- the at least one aperture is sharp-edged as possible out ⁇ forms, so that only little light is incident on such an edge and be reflected.
- the light traps are preferably pot-shaped or funnel-shaped. They have in relation to the main direction of incidence of the light beams from the light emitting diode so geometrically oriented surfaces and / or corrugations on that "die out" the incident where light beams after a few reflections.
- the majority of the remaining upper surface of the cover is preferably fluted thoroughlybil ⁇ det.
- 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 Mirror. This has the advantage that incident light is not diffusely scattered, but reflected reflected.
- the inside of the alarm hood to the mirror surface (s) corrugations as light-absorbing
- a light-absorbing color layer such as 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 makes it possible to dispense with a pot-shaped cover before ⁇ part adhesive, which is usually placed on the floor or on the cover of the optical ⁇ rule measuring chamber.
- a labyrinth Such an arrangement is also referred to as a labyrinth.
- typical ⁇ , cylindrical ausgestaltetes labyrinth has constructiveerwei ⁇ se blades as light-shielding on the radial outer circumference on. 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 can alternatively be integrated in the detector hood or in the base body.
- the detector housing with the detector hood on an essentially rotationally symmetrical or mirror-image outer contour This allows a largely cardisunab ⁇ dependent 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 teilwei ⁇ se concave inner contour of the detector hood following Spiegelgeo ⁇ metry on.
- the mirror surface may comprise a concave portion of the surface of a sphere, an ellipsoid, a paraboloid, or a hyperboloid. From the convex aus ⁇ senkontur follows a geometrically corresponding concave inner ⁇ contour of the mirror surface, provided that the wall ⁇ strength of the detector hood remains essentially unchanged.
- the scattered light smoke detector is a photosensor centrally in the detector housing angeord ⁇ net, so that the scattered light formed in the interior volume of the detector housing encloses an axis extending through the center of the scattered light smoke detector constructive main axis.
- At least one white light-emitting diode is arranged ⁇ tere with an orthogonal to the optical axis circuit board 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 bicolor ⁇ benzyl or multi-color light-emitting diode as an integral optoelek ⁇ tronic device.
- 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.
- color-specific evaluation of the photosensor signal is a brand technical analysis of the detected smoke part ⁇ chen possible with regard to their particle size.
- the first light emitting diode a (monochrome) red light emitting diode or a (monochrome) infrared light-emitting diode having a light wavelength of 940 ⁇ 70 nm.
- the second Leuchtdio ⁇ de is preferably a (monochrome) blue light emitting diode having a light wavelength of 470 ⁇ 70 nm, or a (monochrome) UV light emitting diode in the UV-A range.
- the first and second light ⁇ diode can be combined to form a two-color LED.
- 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 an electronic STEU ⁇ erritt, in particular a microcontroller.
- the tax is erritt connected to the respective light-emitting diode and the photo ⁇ sensor, in particular signal or data technically.
- the control unit outputs a fire alarm if a the respective light emitting diode associated sensor signal exceeds a stray light ⁇ threshold or a combined light-scattering threshold.
- the microcontroller is further adapted to control the light-emitting diodes at least indirectly and in the case of several ⁇ rer light emitting diodes alternatingly to control and time the corresponding photo sensor signal assigned to evaluate.
- 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
- "Middle-infrared range” is a range of wavelengths of 3 .mu.m to 20 .mu.m for heat radiation designated net.
- the heat radiation sensor is in particular a thermopile or a bolometer.
- thermalopile for egg ⁇ ne thermopile.
- Such heat radiation sensors give i.Vgl. To pyrosensors that spend only one signal at kilometersstrahlungsände ⁇ ments, and a sensor signal with constant heat radiation according to their intensity.
- the heat radiation sensor is further aligned according to the invention op table on 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 portion typically comprises the geometrical major 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 in Vietnamese ⁇ sive the detector hood is also designed to be light-tight, so that no appreciable light, either in the visible range, in the UV range or in the near and middle infrared range passes through da detector housing.
- the detected heat radiation is in a direct connection with 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 tempera ture by the heat-conducting material property of the detector ⁇ hood with a time constant of less than 30 s, and in particular less than 10 s follows.
- the Ge ⁇ casing part has a wall thickness in the range of 1 to 2 mm, so that ⁇ a time constant for heat transfer from the off ⁇ is possible senseite to the inside in the central portion of the detector cover of less than 10 seconds.
- the control unit is also connected to the heat radiation sensor and configured to mathematically deduce a temperature value corresponding to the ambient temperature from a heat sensor signal output by the heat radiation sensor. guide and this with to be ⁇ into account when issuing the fire alarm. It can be used too high a temperature value for the plausibility check of detected smoke in one of ⁇ fenen 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 TERMS ⁇ onsgrad is dependent on the surface finish and / or the material of the detector cover and the wavelength of the oriented emit thermal 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 be achieved, for example, by a black plastic or by a black paint application in the central region of the inside of the detector hood. For example, the emissivity can be measured by means of 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 Ge ⁇ housing part is only permeable to heat radiation in the mid-infrared range. The remaining housing parts are, however, carried out before ⁇ preferably light-tight so that no notable light, nor passes in the visible range, in the UV range in the near and mid-infrared range through the remainder of the detector housing.
- the material of the central Ge ⁇ koruseteils may be for example a plastic such as a thermal moplastischer be plastic based on polymethyl methacrylate or polycarbonate or a ceramic, such as transpa ⁇ pension fine crystalline spinel-based ceramics Magne ⁇ sium- and alumina. 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 according to the invention connected to the heat radiation sensor and adapted to generate an output from the thermal radiation sensor thermal sensor signal on the occurrence of significant fluctuations or flicker frequencies for an open flame and flaming embers to monitor back and into account ⁇ term at the output of the fire alarm with.
- the frequency-technical monitoring can take place, for example, by means of digital filters or by means of a digital Fourier analysis (FFT, DFT).
- control unit may additionally be configured to mathematically derive a temperature value corresponding to the ambient temperature from a direct component of the heat sensor signal and also to take it into account 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. 3 shows a third embodiment with a heat radiation sensor for detecting an ambient temperature according to the invention
- FIG. 5 shows a fifth embodiment with a heat radiation sensor for detecting an ambient temperature and for detecting open fire in the sense of a flame detector according to the invention
- FIG. 6 shows a plan view of the embodiment according to FIG. 5 along the viewing direction VI indicated there.
- 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 attached with its An ⁇ final page 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.
- In the area of the openings OF remain light-shielding members in the form of lamellae LAM present which allow the smoke particles to pass, but direct ambient light shield ⁇ (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 planar GmbHungsträ ⁇ ger 7, that their optical axes A orthogonal or nearly orthogonal to the circuit substrate 7 and thus pa ⁇ run parallel to each other.
- the light-emitting diode 5 and the photosensor 6 SMD components that can be applied with high precision and automated on a scarf ⁇ carrier 7 with dedicated contact surfaces.
- 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 befin ⁇ between light emitting diode 5 and photosensor 6 on the one hand and zwi ⁇ tween the inside IS of the detector hood 4 on the other.
- a portion of the interior IS of the detector hood 4 is a mirror surface S, which is the light emitting diode 5 with respect to ⁇ .
- 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 in this case has such a mirror geometry, that the cone of light R, B ei ⁇ NEN reception area E of the photo sensor 6 intersects ⁇ volume in a Z scattered light within the optical measurement 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 surface IS of the detector 4 ⁇ dome light-absorbing structures of AB such as in the form of corrugations or knurled surfaces (not shown).
- the mirror surface S which can be realized, for example, by means of an attached reflective piece of sheet metal or by vapor-deposited metal, such as aluminum.
- the scattered light smoke detector 1 shown also has an essentially rotationally symmetrical or mirror-image cut-out contour.
- SA the constructive main axis or axis of symmetry is drawn for this purpose.
- 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 also roughly follows the mirror geometry of the mirror surface S.
- the resulting The concave mirror geometry can be used advantageously for bundling and focusing the emitted light cone.
- a desired advantageous mirror geometry can be achieved via a suitably selected outer contour of the detector hood.
- 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 adapted to drive the light emitting diode 5, at least ⁇ pulsed indirectly and evaluate a corresponding originating from the photosensor 6 sensor signal. 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 here is designated a red light beam and a red Lichtbün ⁇ del and B with a blue cone of light or a blue light beam it.
- the light-emitting diode 5 may also be a dual LED 50 or a multi-color LED, such as an RGB LED.
- 2 shows a second embodiment with two Spiegelflä ⁇ chen Sl, S2.
- a second mirror surface S2 is provided, which is opposite to the photosensor 6 and which has such a mirror geometry that the original first scattered light center ZI can be expanded by the second StreulichtZen ⁇ spectrum Z2 (without second mirror surface S2).
- 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 IR in the interior of the detector housing 2 gebil ⁇ finished scattered light volume Z now encloses the the center of the smoke detector 1 extending constructive major axis or symmetry axis SA. 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 accommodated in the detector housing 2.
- the heat radiation sensor 9, like the photosensor 6, is arranged centrally and on the circuit carrier 7. With W, the heat-conical conical detection range of the heat radiation sensor 9 is designated.
- the detection range W defines a (virtual) measurement surface MF on the inner side IS of the mel ⁇ derhaube 4 for detecting a local housing temperature. In other words, the light emitted from this measuring surface MF in the direction of the heat radiation sensor 9 ⁇ thermal radiation is detected by the heat radiation sensor.
- 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.
- the constructive main axis SA of the scattered light smoke detector 1 also extends through this point SP. This is thus opposite the measuring surface MF.
- the ambient tempera ture ⁇ T is due to the thin housing of the detector hood 4 already after a short time, such as after 10 s, also on the inner surface IS on the measuring surface to MF.
- 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 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 when the fire alarm is output.
- the wall thickness of the Melderhau ⁇ be 4 is much 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 took the same color scattered light from different
- FIG 5 shows a fifth embodiment with a heat radiation sensor 9 for detecting an ambient temperature T and for detecting open flames 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 to 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 Ge ⁇ housing part 11 additionally forms an optical lens for widening the optical detection range W from.
- the tax erritt 10 is adapted to monitor the thermal sensor signal outputted from the thermal radiation ⁇ sensor 9 to the occurrence of significant fluctuations or flicker frequencies for an open flame and flaming embers in terms of a flame detector back and taken into account in the output of the fire alarm with.
- the control unit 10 may be configured to derive from a DC component of the heat sensor ⁇ nals computationally one of the ambient temperature T corresponding temperature value and also this also in the output of the fire alarm with.
- FIG 7 6 shows, finally, a plan view of the execution ⁇ form according to FIG 5 along the indicated there viewing direction VI.
- This view especially the lamellae LAM as Lichtabpressimplantation 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
- thermopile thermopile
- control unit microcontroller
- SA optical axis symmetry axis, main axis S, Sl, S2 mirror surface, mirror
Landscapes
- 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)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP15180045.5A EP3128493A1 (de) | 2015-08-06 | 2015-08-06 | Streulichtrauchmelder mit einer im meldergehäuse aufgenommenen optischen messkammer und mit einer spiegelfläche an einer innenseite einer melderhaube als teil des meldergehäuses |
| PCT/EP2016/067794 WO2017021217A1 (de) | 2015-08-06 | 2016-07-26 | Streulichtrauchmelder mit einer im meldergehäuse aufgenommenen optischen messkammer und mit einer spiegelfläche an einer innenseite einer melderhaube als teil des meldergehäuses |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3332395A1 true EP3332395A1 (de) | 2018-06-13 |
| EP3332395B1 EP3332395B1 (de) | 2019-05-22 |
Family
ID=53783596
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15180045.5A Withdrawn EP3128493A1 (de) | 2015-08-06 | 2015-08-06 | Streulichtrauchmelder mit einer im meldergehäuse aufgenommenen optischen messkammer und mit einer spiegelfläche an einer innenseite einer melderhaube als teil des meldergehäuses |
| EP16745687.0A Active EP3332395B1 (de) | 2015-08-06 | 2016-07-26 | Streulichtrauchmelder mit einer im meldergehäuse aufgenommenen optischen messkammer und mit einer spiegelfläche an einer innenseite einer melderhaube als teil des meldergehäuses |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15180045.5A Withdrawn EP3128493A1 (de) | 2015-08-06 | 2015-08-06 | Streulichtrauchmelder mit einer im meldergehäuse aufgenommenen optischen messkammer und mit einer spiegelfläche an einer innenseite einer melderhaube als teil des meldergehäuses |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP3128493A1 (de) |
| CN (1) | CN107851355B (de) |
| WO (1) | WO2017021217A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102638997B1 (ko) * | 2017-12-15 | 2024-02-20 | 아나로그 디바이시즈 인코포레이티드 | 소형의 광학적 연기 검출기 시스템 및 장치 |
| US10809173B2 (en) | 2017-12-15 | 2020-10-20 | Analog Devices, Inc. | Smoke detector chamber boundary surfaces |
| US11788942B2 (en) | 2017-12-15 | 2023-10-17 | Analog Devices, Inc. | Compact optical smoke detector system and apparatus |
| JP6812577B2 (ja) * | 2017-12-26 | 2021-01-13 | 株式会社日立ハイテク | 自動分析装置および自動分析方法 |
| USD920825S1 (en) | 2018-11-06 | 2021-06-01 | Analog Devices, Inc. | Smoke detector chamber |
| USD874964S1 (en) | 2018-11-06 | 2020-02-11 | Analog Devices, Inc. | Blocking members in a smoke detector chamber |
| US12211370B2 (en) | 2018-12-02 | 2025-01-28 | Analog Devices, Inc. | Fire detection system |
| US10921367B2 (en) | 2019-03-06 | 2021-02-16 | Analog Devices, Inc. | Stable measurement of sensors methods and systems |
| US11796445B2 (en) | 2019-05-15 | 2023-10-24 | Analog Devices, Inc. | Optical improvements to compact smoke detectors, systems and apparatus |
| WO2021115728A1 (de) * | 2019-12-10 | 2021-06-17 | Siemens Schweiz Ag | Rauchdetektionseinheit für einen brandmelder mit grundpulsunterdrückung sowie geeignetes verfahren zur rauchdetektion |
| EP3962248A1 (de) * | 2020-08-31 | 2022-03-02 | Siemens Aktiengesellschaft | Gehäuse und elektrisches gerät |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH684556A5 (de) * | 1992-09-14 | 1994-10-14 | Cerberus Ag | Optischer Rauchmelder. |
| DE19741853A1 (de) * | 1997-09-23 | 1999-03-25 | Bosch Gmbh Robert | Rauchmelder |
| PT1103937E (pt) * | 1999-11-19 | 2005-09-30 | Siemens Building Tech Ag | Detector de incendios |
| TWI235965B (en) * | 2001-04-24 | 2005-07-11 | Matsushita Electric Works Ltd | Fire detector unit |
| DE50205813D1 (de) * | 2002-06-20 | 2006-04-20 | Siemens Schweiz Ag Zuerich | Brandmelder |
| CN201616160U (zh) * | 2009-05-26 | 2010-10-27 | 官洪运 | 多波段红外图像型大空间火灾探测器 |
-
2015
- 2015-08-06 EP EP15180045.5A patent/EP3128493A1/de not_active Withdrawn
-
2016
- 2016-07-26 CN CN201680046315.7A patent/CN107851355B/zh active Active
- 2016-07-26 EP EP16745687.0A patent/EP3332395B1/de active Active
- 2016-07-26 WO PCT/EP2016/067794 patent/WO2017021217A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017021217A1 (de) | 2017-02-09 |
| EP3128493A1 (de) | 2017-02-08 |
| EP3332395B1 (de) | 2019-05-22 |
| CN107851355B (zh) | 2020-03-17 |
| CN107851355A (zh) | 2018-03-27 |
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