EP0821330A1 - Détecteur de fumée - Google Patents

Détecteur de fumée Download PDF

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Publication number
EP0821330A1
EP0821330A1 EP96111751A EP96111751A EP0821330A1 EP 0821330 A1 EP0821330 A1 EP 0821330A1 EP 96111751 A EP96111751 A EP 96111751A EP 96111751 A EP96111751 A EP 96111751A EP 0821330 A1 EP0821330 A1 EP 0821330A1
Authority
EP
European Patent Office
Prior art keywords
light
smoke detector
measuring chamber
detector according
floor
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
Application number
EP96111751A
Other languages
German (de)
English (en)
Other versions
EP0821330B1 (fr
Inventor
Urs Riedi
Bernhard Durrer
Kurt Dr. Hess
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 Building Technologies AG
Original Assignee
Cerberus 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8223019&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0821330(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cerberus AG filed Critical Cerberus AG
Priority to EP96111751A priority Critical patent/EP0821330B1/fr
Priority to ES96111751T priority patent/ES2183899T3/es
Priority to DE59609625T priority patent/DE59609625D1/de
Priority to AT96111751T priority patent/ATE223604T1/de
Priority to ZA9705811A priority patent/ZA975811B/xx
Priority to KR10-1998-0701678A priority patent/KR100467130B1/ko
Priority to PCT/CH1997/000269 priority patent/WO1998003946A1/fr
Priority to PL97325921A priority patent/PL184244B1/pl
Priority to AU33327/97A priority patent/AU725418B2/en
Priority to RU98107584/09A priority patent/RU2189080C2/ru
Priority to CNB971909334A priority patent/CN1135511C/zh
Priority to UA98031427A priority patent/UA42086C2/uk
Publication of EP0821330A1 publication Critical patent/EP0821330A1/fr
Publication of EP0821330B1 publication Critical patent/EP0821330B1/fr
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Definitions

  • the invention relates to a smoke detector with a detector insert which can be fastened in a base with an optics module, which is a light source, a light receiver, a Measuring chamber, a floor and a labyrinth system with on the periphery of the measuring chamber arranged panels.
  • an optics module which is a light source, a light receiver, a Measuring chamber, a floor and a labyrinth system with on the periphery of the measuring chamber arranged panels.
  • the optical module is known so designed that disturbing extraneous light and smoke can easily penetrate the measuring chamber.
  • Light source and light receiver are arranged so that no light rays on direct Can get away from the source to the receiver. In the presence of smoke particles In the beam path, the light from the light source is scattered at it and part of it this scattered light falls on the light receiver and causes an electrical signal.
  • a scattered-light smoke detector known from DE-A-44 12 212 contains a measuring chamber of the shape of a round box, one end of which is connected to the ceiling of the attached to the monitored room connected plate and the side wall by a Insect screen is formed. The one facing away from the plate mentioned and the detector tip facing end of the measuring chamber is covered by a flat bottom.
  • the invention now provides a smoke detector of the type mentioned in which false alarms are triggered due to light scattering from dust particles avoided as completely as possible or at least greatly reduced, and thereby an extension the maintenance intervals are reached.
  • the object is achieved according to the invention in that the floor is formed in this way is that it is at a greater distance from the center by the light source and Light receiver has a certain level than at its edge.
  • the solution according to the invention brings about a drastic reduction in the interference of dust particles because they are now much further away from the actual measuring zone than before, reducing the likelihood of dust particles being scattered Light entering the measuring zone has become significantly less.
  • the optical axes of the light source and light receiver intersect in the area of the center of the measuring chamber and thus also the center of the floor. There the bottom, here in the area of its tip or tip, its greatest distance from the measuring plane, and since dust mainly settles in this floor area it is very unlikely that light emitted by the light source will become one dust particles deposited at the top of the floor and from there into the Is backscattered.
  • a first preferred embodiment of the smoke detector according to the invention is thereby characterized in that the bottom is funnel-shaped and the shape of a Has a cone or a pyramid.
  • the floor has a sieve or lattice structure and acts as an insect screen.
  • This embodiment has the advantage that the smoke detector is less than one component has so far what is associated with a corresponding cost advantage.
  • a third preferred embodiment of the smoke detector according to the invention is thereby characterized in that the bottom on its inner surface facing the measuring chamber is provided with a plurality of vertically upwardly extending slats, and that The arrangement, number, height and spacing of these slats are selected so that light falling against the floor before hitting it on one of the slats hits, and that the light receiver only sees the slats from the floor.
  • the inventive design of the floor with the slats directed upwards further reduces the likelihood that light from the beam path in the Measuring chamber is scattered on dust particles deposited on the floor. Because the Dust particles will not be deposited on the lamellae, but on their base on the Inner surface of the floor, and this is an area that is exposed to light by the slats the measuring chamber is shielded.
  • the slats also act as a shield against external light from outside, which is the measurement reliability of the inventive Smoke detector further increased.
  • Underground light Another significant advantage resulting from the absorption of unwanted Secondary scattering or reflections from light, the so-called Underground light, results in decreasing demands on the manufacturing tolerances. The means that with increasing absorption of the underground light the requirements for the Positioning accuracy of light source and light receiver decrease.
  • the scattered-light smoke detector shown consists in a known manner of a detector insert 1, which can be fastened in a base (not shown) which is preferably mounted on the ceiling of the room to be monitored, and of a detector hood 2 placed over the detector insert 1, which in the area of its in the operating state of the Detector against the space to be monitored is provided with smoke inlet slots 3.
  • the detector insert 1 essentially comprises a box-like base body, on the side facing the tip of an optical module 5 surrounded by a side wall 4 and on the side facing the detector base a printed circuit board with evaluation electronics (not shown) are arranged.
  • This detector structure is known and will not be described in more detail here. In this context, reference is made, for example, to the detectors of the AlgoRex series ( AlgoRex - registered trademark of Cerberus AG) and to European patent application No. 95117405.1.
  • the optics module 5 essentially consists of a light source 6, a light receiver 7, a measuring chamber 8, a labyrinth system on the inside of the side wall 4 arranged peripheral panels 9, a central panel 10 and a bottom 11.
  • the optical axes of the light source formed by an infrared light emitting diode (IRED) 6 and the light receiver 7 are not on a common straight line, but are kinked, with the central one near the intersection Aperture 10 is arranged.
  • the side wall 4 and the bottom 11 shield the measuring chamber 8 against external light from the outside, and the peripheral panels 9 and the central Aperture 10 prevent light rays in a direct path from the light source 6 to Light receiver 7 can get.
  • the peripheral panels 9 also serve to suppress the so-called underground light, which is caused by unwanted scattering or reflections.
  • the intersection of that emitted by the light source 6 Beams and the field of view of the light receiver 7 form the following the actual measuring range referred to as the scattering space.
  • the light source 6 sends short, intense light pulses into the scattering space, the light receiver 7 indeed "sees” the scattering space, but not the light source 6.
  • the light of the Light source 6 is scattered by smoke entering the scattering space, and a part this scattered light falls on the light receiver 7.
  • the receiver signal generated thereby is processed by the electronics.
  • the smoke detector can be next to the optical sensor system contained in the optical module 5, further sensors, for example contain a temperature and / or a gas sensor.
  • the bottom 11 has a sieve or lattice-like structure and is on the outside with star-shaped ribs 12 provided, through which the smoke is brought to the floor. This flows the smoke in the vertical direction into the measuring chamber 8 and into the scattering space.
  • the base 11 has one from the measuring chamber much larger distance than is the case with a flat floor.
  • the Measuring chamber 8 penetrated dust particles that scatter the light from the light source 5 and therefore act like smoke particles, are deposited in the top of the bottom 11 and are are there outside the area of incidence of the radiation from the light source 6, whereby the interference of these smoke particles is drastically reduced.
  • the funnel-shaped area of the base 11 has the Form a pyramid or a truncated pyramid, with all side surfaces of the pyramid have the sieve-like or lattice-like structure already mentioned. 1 is off For the sake of clearer recognition, only one of the pyramid surfaces has one lattice-like structure 13 indicated schematically.
  • the ribs 12 on the outside of the Bottom 11 are preferably arranged along the pyramid side edges.
  • the probability of interference from dust particles deposited on the floor 11 is further reduced by special training of the soil.
  • This increases the risk of scattering of light on dust particles much less, since the dust is much closer to the floor remains so that it adheres to the vertical walls of the slats.
  • the slats 14, 15 the light receiver 7 against external light from the outside.
  • not all pyramid surfaces are provided with lamellas, but only that of the light source 6 and that opposite the light receiver 7 and that between pyramid surface enclosed between these two surfaces. That of the light source 6 and the light receiver 7 opposite pyramid surfaces are parallel to Base edge of the pyramid oriented longitudinal lamella 14 and the between these surfaces enclosed pyramid surface is with at least one longitudinal lamella 14 and provided with several transverse lamellae 15 oriented perpendicular to this.
  • the longitudinal slats 14 run at least approximately perpendicular to the optical axis of the opposite one Light source or the opposite light receiver.
  • the cross slats 15 serve primarily for the optical decoupling of light source 6 and light receiver 7.
  • the optics module 5 For even better absorption of background light, at least certain parts have of the optics module 5, in particular the peripheral diaphragms 9, the central diaphragm 10 and the the floor of the measuring chamber 8 opposite the floor 11, instead of the previously usual matt surfaces shiny, i.e. reflective, surfaces on. Of course can still other parts or the entire inside of the optics module 5 a shiny Have surface.
  • peripheral panels 9 or at least most of them are not rotationally symmetrical but are arranged so that the Angle of incidence of that emitted by the light source 6 and that of the light receiver 7 received light beam on these diaphragms is constant.
  • Arranged rotationally symmetrical Peripheral diaphragms 9 would be those that rotate by rotating an aperture around the center are formed.
  • Fig. 1 are the light source 6 and the light receiver 7 adjacent Four peripheral screens 9 are not rotationally symmetrical.
  • the angle of incidence is chosen so that the incident and not absorbed light as often as possible is reflected between the peripheral diaphragms 9.
  • the peripheral panels 9 each consist of two angled partial surfaces, their mutual inclination and the distance and the length of the peripheral diaphragms 9 are selected so that the light emitted to the peripheral diaphragms 9 can not get directly onto the inner surface of the side wall 4, but in any case meets a peripheral diaphragm 9 and from this to the adjacent peripheral diaphragm is reflected.
  • the non-rotationally symmetrical arrangement of the majority of the peripheral diaphragms 9 leads to better absorption of the background light and thus less stringent requirements for the positioning and component accuracy of the light source 6 and light receiver 7 and a less pollution-prone detector.
  • the peripheral panels 9 are against their Central aperture 10 directed inner edge formed as sharp as possible. That has the The advantage that only a little light falls on such a sharp edge and therefore less light is reflected in a variety of directions.
  • the sharpness is an edge a limit is set by the thickness of the wire used, which meets the requirements to the inner edges of the peripheral panels 9 is not sufficient.
  • detector 1 the desired sharpness of the inner edges is achieved by using the injection molding tool a core is used, which is provided on its for forming the inner edges Periphery has a stepped (serrated or serrated) contour. The single ones Gradations of this contour lie on the inside to form the peripheral diaphragms 9 grooves formed in the injection mold and close them towards the center from. This allows between the grooves of the injection mold and the gradations very sharp edges are formed of the core.
  • peripheral shutters 9 with sharp inner edges and optical module parts (peripheral covers 9, Central aperture 10, ceiling of the measuring chamber 8) with a shiny surface to a striking Reduction of the basic pulse leads, and that the detector is less dusty and becomes susceptible to condensation.
  • the light source 6 and the light receiver 7 each arranged in a housing 16 or 17.
  • the two housings 16 and 17, which are worked on the ceiling of the measuring chamber 8, are open at the bottom and are covered on their open side by the floor 11.
  • the housing 16 and 17 At her the central aperture 10 facing front are the housing 16 and 17 each through a window with a Light exit or light entry opening completed. These windows face the Housing windows of known scattered light smoke detectors make the difference that they are in one piece are trained.
  • the windows consist of two parts, from one worked on the ceiling of the measuring chamber and the other on the floor is.
  • the floor When fitting the floor, there are always difficulties with fitting and it comes to the formation of a light gap between the two window halves and thus unwanted interference of the transmission and reception light.
  • Disruptions of this kind are excluded and no problems can arise occur with the positioning accuracy of the two window halves.
  • the top and bottom are Half of the one-piece windows in the manner of the two cutting edges of scissors against each other transferred.
  • the injection molding tool can be designed without side pull, that for each of the two mutually offset halves of the light and the Light entry opening a separate shaped element is provided, so that a precisely defined Shape and a clean surface of these openings is achieved.

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)
EP96111751A 1996-07-22 1996-07-22 Détecteur de fumée Expired - Lifetime EP0821330B1 (fr)

Priority Applications (12)

Application Number Priority Date Filing Date Title
EP96111751A EP0821330B1 (fr) 1996-07-22 1996-07-22 Détecteur de fumée
ES96111751T ES2183899T3 (es) 1996-07-22 1996-07-22 .etector de humos
DE59609625T DE59609625D1 (de) 1996-07-22 1996-07-22 Rauchmelder
AT96111751T ATE223604T1 (de) 1996-07-22 1996-07-22 Rauchmelder
ZA9705811A ZA975811B (en) 1996-07-22 1997-06-30 Smoke detector.
PCT/CH1997/000269 WO1998003946A1 (fr) 1996-07-22 1997-07-15 Detecteur de fumee
KR10-1998-0701678A KR100467130B1 (ko) 1996-07-22 1997-07-15 연기경보장치
PL97325921A PL184244B1 (pl) 1996-07-22 1997-07-15 Czujka dymu
AU33327/97A AU725418B2 (en) 1996-07-22 1997-07-15 Smoke detector
RU98107584/09A RU2189080C2 (ru) 1996-07-22 1997-07-15 Сигнализатор дыма
CNB971909334A CN1135511C (zh) 1996-07-22 1997-07-15 烟感探测器
UA98031427A UA42086C2 (uk) 1996-07-22 1997-07-15 Сигналізатор диму

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96111751A EP0821330B1 (fr) 1996-07-22 1996-07-22 Détecteur de fumée

Publications (2)

Publication Number Publication Date
EP0821330A1 true EP0821330A1 (fr) 1998-01-28
EP0821330B1 EP0821330B1 (fr) 2002-09-04

Family

ID=8223019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111751A Expired - Lifetime EP0821330B1 (fr) 1996-07-22 1996-07-22 Détecteur de fumée

Country Status (12)

Country Link
EP (1) EP0821330B1 (fr)
KR (1) KR100467130B1 (fr)
CN (1) CN1135511C (fr)
AT (1) ATE223604T1 (fr)
AU (1) AU725418B2 (fr)
DE (1) DE59609625D1 (fr)
ES (1) ES2183899T3 (fr)
PL (1) PL184244B1 (fr)
RU (1) RU2189080C2 (fr)
UA (1) UA42086C2 (fr)
WO (1) WO1998003946A1 (fr)
ZA (1) ZA975811B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004001693A1 (fr) * 2002-06-20 2003-12-31 Siemens Building Technologies Ag Detecteur de fumee a diffusion
EP1732049A1 (fr) 2005-06-10 2006-12-13 Siemens S.A.S. Détecteur de feux ou de fumée à haute rejection de fausses alarmes
EP1768074A1 (fr) 2005-09-21 2007-03-28 Siemens Schweiz AG Détection prompte d'incendies
US7463159B2 (en) 2002-06-20 2008-12-09 Siemens Building Technologies Ag Fire detector
EP3699882A1 (fr) * 2015-05-15 2020-08-26 Google LLC Architecture de chambre de détecteur de fumée et procédés associés

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2340947C2 (ru) * 2007-06-15 2008-12-10 Валерий Васильевич Овчинников Пожарный дымовой оптико-электронный извещатель
CN101413889B (zh) * 2007-10-17 2010-08-11 同方泰德国际科技(北京)有限公司 一种对射型光电感烟探测器
US20110170261A1 (en) * 2008-10-01 2011-07-14 Sharp Kabushiki Kaisha Electronic apparatus, illuminating device, display device and television receiver
RU2509369C1 (ru) * 2012-07-05 2014-03-10 Закрытое акционерное общество "Инженерно-техническая компания ИРСЭТ-Центр" Оптический датчик дыма
RU2646195C1 (ru) * 2014-07-14 2018-03-01 Фенвал Контролз Оф Джэпэн, Лтд. Фотоэлектрический детектор дыма
CN104459817B (zh) * 2014-12-16 2017-01-25 公安部沈阳消防研究所 一种火灾征兆探测装置及方法
KR101772822B1 (ko) * 2016-09-26 2017-08-29 이병권 이중격벽 암실구조를 갖는 광전식 연기감지기
RU187749U1 (ru) * 2018-08-31 2019-03-18 Общество с ограниченной ответственностью "Элеста" Датчик дыма
DE102019110336A1 (de) * 2019-04-18 2020-10-22 Jörg Flemming Rauchmelder
CN110443972B (zh) * 2019-09-12 2024-02-06 深圳市高新投三江电子股份有限公司 一种迷宫背景值控制方法
JP2023102460A (ja) * 2022-01-12 2023-07-25 ニデックプレシジョン株式会社 シャッター機構及び検査装置
RU210429U1 (ru) * 2022-01-31 2022-04-15 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Датчик дымовой оптико-электронный для условий, осложненных наличием внутри помещения взвешенных частиц цемента

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727056A (en) * 1972-03-03 1973-04-10 Electro Signal Lab Photon couplers with solid state lamps
DE3334545A1 (de) * 1983-09-23 1985-04-04 Siemens AG, 1000 Berlin und 8000 München Optischer rauchmelder
US4539556A (en) * 1983-04-15 1985-09-03 Pittway Corporation Combustion products detector with accelerated test
DE4412212A1 (de) * 1993-04-09 1994-10-13 Hochiki Co Lichtstreuender Rauchdetektor mit reduziertem Nullpunkt-Wahrnehmungsniveau

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727056A (en) * 1972-03-03 1973-04-10 Electro Signal Lab Photon couplers with solid state lamps
US4539556A (en) * 1983-04-15 1985-09-03 Pittway Corporation Combustion products detector with accelerated test
DE3334545A1 (de) * 1983-09-23 1985-04-04 Siemens AG, 1000 Berlin und 8000 München Optischer rauchmelder
DE4412212A1 (de) * 1993-04-09 1994-10-13 Hochiki Co Lichtstreuender Rauchdetektor mit reduziertem Nullpunkt-Wahrnehmungsniveau

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004001693A1 (fr) * 2002-06-20 2003-12-31 Siemens Building Technologies Ag Detecteur de fumee a diffusion
EP1376504A1 (fr) * 2002-06-20 2004-01-02 Siemens Building Technologies AG Capteur de fumée par diffusion de lumière
US7365846B2 (en) 2002-06-20 2008-04-29 Siemens Aktiengesellschaft Scattered light smoke detector
US7463159B2 (en) 2002-06-20 2008-12-09 Siemens Building Technologies Ag Fire detector
EP1732049A1 (fr) 2005-06-10 2006-12-13 Siemens S.A.S. Détecteur de feux ou de fumée à haute rejection de fausses alarmes
US7760102B2 (en) 2005-06-10 2010-07-20 Siemens Ag Fire or smoke detector with high false alarm rejection performance
EP1768074A1 (fr) 2005-09-21 2007-03-28 Siemens Schweiz AG Détection prompte d'incendies
EP3699882A1 (fr) * 2015-05-15 2020-08-26 Google LLC Architecture de chambre de détecteur de fumée et procédés associés

Also Published As

Publication number Publication date
ES2183899T3 (es) 2003-04-01
ATE223604T1 (de) 2002-09-15
CN1135511C (zh) 2004-01-21
PL184244B1 (pl) 2002-09-30
WO1998003946A1 (fr) 1998-01-29
PL325921A1 (en) 1998-08-17
CN1198236A (zh) 1998-11-04
ZA975811B (en) 1998-02-04
KR20000064238A (ko) 2000-11-06
DE59609625D1 (de) 2002-10-10
AU725418B2 (en) 2000-10-12
AU3332797A (en) 1998-02-10
KR100467130B1 (ko) 2005-06-02
EP0821330B1 (fr) 2002-09-04
RU2189080C2 (ru) 2002-09-10
UA42086C2 (uk) 2001-10-15

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