EP1258848A2 - Optischer Rauchmelder - Google Patents
Optischer Rauchmelder Download PDFInfo
- Publication number
- EP1258848A2 EP1258848A2 EP02009657A EP02009657A EP1258848A2 EP 1258848 A2 EP1258848 A2 EP 1258848A2 EP 02009657 A EP02009657 A EP 02009657A EP 02009657 A EP02009657 A EP 02009657A EP 1258848 A2 EP1258848 A2 EP 1258848A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- partition
- measuring chamber
- smoke detector
- optical
- und
- 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
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems, e.g. audible personal calling systems
- G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission
-
- 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
-
- 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
- G08B17/11—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 an optical smoke detector according to claim 1.
- Optical smoke detectors are known in a wide variety of embodiments. It is usually located in a measuring chamber into which ambient air penetrates can, but if possible hardly any outside light, an optical measuring section that determines when smoke enters the route. Such detectors with a variety of other detectors connected to a system, these are usually connected to one Control center in connection, which gives an alarm when a detector that presence of smoke. In many cases, however, it is also desirable to use the Detector to couple an acoustic alarm immediately. Such combinations have already become known. Below are some well-known examples discussed in the accompanying drawings according to Figures 2-4 are shown schematically.
- the detector shown in FIG. 2 has become known from DE GM 82 10 633.
- the Device consists essentially of a round housing 1, the one end 14 towards a smoke chamber 2 and towards the other end a sound chamber 4 having.
- a partition runs between the smoke chamber 2 and the sound chamber 4 5.
- the oppositely arranged are together as Light barrier acting and arranged on the cylindrical housing inner wall 16 light-optical elements 7, 8 housed.
- the smoke can pass through the center of the detector openings 6 delimiting the smoke chamber 2 end wall 14 enter to reach the measuring light beam and to attenuate its intensity. at The presence of a certain amount of smoke becomes that of the neighboring one Sound chamber 4 controlled on the front side 15 attached sound generator 3.
- the Sounders 3 designed as loudspeakers also act as feed pumps for the smoke.
- the diaphragm of the sounder is first placed on a low vibration frequency limited.
- the partition 5 contains the partition 5 a plurality of air passage openings 10 with one-way or Check valves so that air from the sound chamber 4 into the smoke chamber 2 can flow.
- the end face 15 of the sound chamber 4 also contains the same Purpose openings 9.
- Such a smoke detector with sounder has several disadvantages. Usually a smoke detector must be attached to the ceiling, and for all radial ones Flow directions must have good responsiveness.
- Speakers do not meet the vulnerability requirements the mechanical components, their size and, above all, the required high energy in the event of an alarm, since this type of fire detector usually has a Battery operated.
- the known fire detector 19 shown in FIG. 3 is attached to a ceiling 20 and consists of a base 21 and an insert 22.
- the housing 23 of the detector is a relatively small optical measuring chamber on a circuit board 24 25 attached off-center in the signaling housing 23. It is also off-center a sound generator 29 is arranged, which contains a piezo disk 29.
- a cylindrical extension 27 is arranged on the end face 26 the piezo disk 29 rests. From an opening 28 in the end face 26 The sound leaves the housing essentially parallel to the axis.
- the known construction takes into account the attachment of the smoke detector to the ceiling, but has disadvantages in smoke detection and sound propagation.
- a uniform penetration of the smoke into the measuring chamber 25 from all sides is hindered by the inlet openings lying on its circumference by the sound generator 29 and the attachment 27.
- the measuring chamber 25 only achieves an insufficient sensitivity.
- the sound is also mainly directed at the floor below the detector. With a protected area of up to 120m 2 to be monitored, a smoke detector is expected to be able to hear the warning tone in neighboring rooms in the event of an alarm.
- the smoke detector with sound generator shown in Fig. 4 is with the help of an installation base 32 attached to the ceiling 20.
- the fire detector 31 has via an interchangeable detector insert 33.
- In its housing 34 is centered on Axis the measuring chamber attached to the board 36.
- the smoke can pass through Openings 37 in the cylindrical part of the housing 34 enter the measuring chamber 35.
- Staggered and partly below the measuring chamber 35 is above the board 36
- Sounder 38 in the area of a larger diameter shoulder of the housing 34 arranged.
- This well-known smoke detector fulfills the requirements for smoke detection, is disadvantageous in terms of sound propagation. So it bounces off the piezo disk of the sounder 38 generated sound partially against the bottom the measuring chamber 35 and is thereby passed into the detector interior, from which it cannot escape into the detector environment. This results in a volume reduction on.
- Another disadvantage is the strong directional radiation of the Alarm tones through the openings 39 only in front of the sounder and the Shading of the alarm tone by the cylindrical surrounding the measuring chamber 35 Part of the housing 34.
- FIG. 4 An alternative is indicated in FIG. 4 with a dash-dotted line.
- a Sounder 40 arranged above the board 36. The sound first passes through hole 41 present in the board 36, in order to subsequently open the way to the outside to take over case openings.
- the invention has for its object to provide an optical smoke detector To create sounder that has a good acoustic effect, nevertheless in No loss of smoke detection.
- the Housing shape of the smoke detector be visually appealing.
- a lower one is over the width of the detector housing measuring chamber from a room above the partition, which in turn is separated by the one containing the electronic circuit Circuit board is divided, which is at a distance from the partition.
- the sound generator is arranged on the partition, preferably in the middle above a hole in the partition.
- the sounder is preferably one Piezo disk formed, which is preferably on a cylindrical neck on the Partition is supported. The opening is therefore in front of the antinode Piezodisc. The sound generated by the sound generator first passes axially through the Opening in the partition and is deflected in the measuring chamber and leaves under multiple reflections in the measuring chamber, these through side openings.
- the Openings are preferably over the entire circumference of the detector housing, preferably evenly spaced. This can make an even radial radiation into the room in which the detector is located on the ceiling, occur.
- the measuring chamber is preferably a resonance chamber, whereby the Sound effect of the sounder is significantly amplified.
- the sound detector is in the detector in this way integrated that there is a good acoustic effect, yet a functional one and visually appealing symmetrical housing shape as well as an optimal construction the measuring chamber is made possible.
- the placement or attachment of the Sound generator is vibration-resistant, space-saving and provides an even Radiation of the sound safely. Due to the essentially radial to the reporting axis Sound radiation is a far-reaching, oriented spread reached.
- a smoke detector is generally designated 51. He assigns one to the Ceiling 20 attached installation base 52 and a detector insert 53.
- the detector insert consists of a bowl-like lower part 65 and a cap-like one Cover 64.
- the lower part 65 that like the cover 64 made of plastic material is formed, forms the outer part of the detector 51.
- the parts mentioned are by the way circular at the circumference.
- a measuring chamber 54 which is approximately the same height, essentially unhindered extends across the width of the detector 51, upwards by a horizontal Partition 55 limited and down by a horizontal wall 61 of the Measuring chamber housing 62.
- the partition 55 is supported on the edge of the measuring chamber housing via webs 63, which form openings between them that extend over the circumference of the detector 51 are evenly distributed.
- From the partition 54 are hollow and lugs 56 open on one side and projecting to the rear.
- You take optical Elements 59, 60 which are connected to a circuit board 58.
- the board stretches within the cover 64 approximately parallel to the partition 55 and at a distance to this.
- the measuring chamber 62 is otherwise embedded in the shell-like lower part 65.
- the shell-like lower part has ribs running at a distance along the circumference 66, which coincide with the openings formed by the support webs 63, to the entry of ambient air into the measuring chamber 54 and thus also from To allow smoke.
- the webs 63 are specially designed so that no light comes out the environment can enter the measuring chamber 54.
- Is in the middle of the partition 55 formed an opening 69, and a hollow cylindrical extension 68 on the partition 55, which extends to the board 58, carries a piezo disk 67. The through the Wavy line indicated sound is generated by the piezo disk 67, the first passes through the opening 69 and is passed into the measuring chamber 54.
- the insert formed from parts 64 and 65 can be made in any known manner and be releasably attached to the base 52.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electromagnetism (AREA)
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
- einem Gehäuse, das über geeignete Mittel an der Decke eines Raums anbringbar ist,
- einer Meßkammer zwischen einer unteren annähernd horizontalen Gehäusewand und einer im Abstand und parallel zur unteren Gehäusewand verlaufenden Trennwand (55), die einen optischen Meßpfad und seitliche Öffnungen für den Eintritt von Umgebungsluft aufweist,
- einer parallel und im Abstand zur und oberhalb der Trennwand angeordnete Schaltplatine, die neben einer elektronischen Schaltungsanordnung die optischen Elemente für den Meßpfad hält, deren Halterungen sich durch Öffnungen in der Trennwand erstrecken,
- einer vorzugsweise mittigen Öffnung in der Trennwand und
- einem oberhalb der Trennwand angeordneten Schallgeber, der über Leitungen mit der Platine verbunden ist.
Description
- Fig. 1
- zeigt einen Schnitt durch einen schematisch dargestellten Rauchmelder nach der Erfindung.
- Fig. 2 bis 4
- zeigen schematisch Rauchmelder nach dem Stand der Technik.
Claims (7)
- Optischer Rauchmelder miteinem Gehäuse, das über geeignete Mittel an der Decke (20) eines Raums anbringbar ist,einer Meßkammer (54) zwischen einer unteren annähernd horizontalen Gehäusewand (61) und einer im Abstand und parallel zur unteren Gehäusewand (61) verlaufenden Trennwand (55), die einen optischen Meßpfad und seitliche Öffnungen für den Eintritt von Umgebungsluft aufweist,einer parallel und im Abstand zur und oberhalb der Trennwand (55) angeordnete Schaltplatine (58), die neben einer elektronischen Schaltungsanordnung die optischen Elemente (59, 60) für den Meßpfad hält, deren Halterungen sich durch Öffnungen in der Trennwand (55) erstrecken,einer vorzugsweise mittigen Öffnung (69) in der Trennwand (55) undeinem oberhalb der Trennwand (55) angeordneten Schallgeber (67), der über Leitungen mit der Platine (58) verbunden ist.
- Optischer Rauchmelder nach Anspruch 1, dadurch gekennzeichnet, daß der Schallgeber (67) von einer Piezokristall-Scheibe gebildet ist, die auf einem hohlzylindrischen Ansatz (68) auf der Trennwand (55) angebracht ist, der sich annähernd koaxial zur Öffnung (69) in Richtung Platine (58) erstreckt.
- Optischer Rauchmelder nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Meßkammer (54) als Resonanzraum ausgebildet ist.
- Optischer Rauchmelder nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die seitlichen Öffnungen der Meßkammer (54) über den Umfang der Meßkammer (54) annähernd gleichmäßig verteilt sind.
- Optischer Rauchmelder nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Trennwand (55) sich über Stege (63) am Umfang der Meßkammer (54), die die seitlichen Öffnungen begrenzen, auf der Meßkammerwand (61) abstützt.
- Optischer Rauchmelder nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die optischen Elemente in hohlen Ansätzen (56, 57) der Trennwand (55) angeordnet sind, die seitliche eine Öffnung aufweisen.
- Optischer Rauchmelder nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß Trennwand (55) und Meßkammerwand (61) in einem schalenartigen Unterteil (65) aus Kunststoff angeordnet sind, das mittels eines kappenartigen Deckels (64) abgedeckt und Unterteil (65) und Deckel (64) einen Einsatz bilden, der an einem an der Decke (20) des Raums befestigten Sockel (52) lösbar anbringbar ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20108451U | 2001-05-19 | ||
| DE20108451U DE20108451U1 (de) | 2001-05-19 | 2001-05-19 | Optischer Rauchmelder |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1258848A2 true EP1258848A2 (de) | 2002-11-20 |
| EP1258848A3 EP1258848A3 (de) | 2003-05-21 |
| EP1258848B1 EP1258848B1 (de) | 2009-09-02 |
Family
ID=7957107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02009657A Expired - Lifetime EP1258848B1 (de) | 2001-05-19 | 2002-04-29 | Optischer Rauchmelder |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1258848B1 (de) |
| AT (1) | ATE441911T1 (de) |
| DE (2) | DE20108451U1 (de) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2421620A (en) * | 2004-12-23 | 2006-06-28 | Kieron T N Chapman | Fire alarm sounder |
| EP1683124A4 (de) * | 2003-08-20 | 2008-01-23 | Clipsal Australia Pty Ltd | Kompakter rauchalarm |
| EP2804159A1 (de) * | 2013-05-17 | 2014-11-19 | Hager Security | Elektronische Vorrichtung mit Schallemissionsmittel |
| US9970912B2 (en) | 2012-09-27 | 2018-05-15 | Utc Fire & Security Americas Corporation, Inc. | Modular smoke detection system |
| WO2019234376A1 (en) * | 2018-06-05 | 2019-12-12 | Electronic Modular Services Ltd. | Smoke chamber as audio chamber in audible alarm devices |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008014991B3 (de) * | 2008-03-19 | 2009-03-12 | Job Lizenz Gmbh & Co. Kg | Verfahren und Warnmelder, insbesondere Rauchmelder |
| DE102008015043A1 (de) * | 2008-03-19 | 2009-09-24 | Ista International Gmbh | Rauchwarnmelder |
| DE102015004458B4 (de) | 2014-06-26 | 2016-05-12 | Elmos Semiconductor Aktiengesellschaft | Vorrichtung und Verfahren für einen klassifizierenden, rauchkammerlosen Luftzustandssensor zur Prognostizierung eines folgenden Betriebszustands |
| DE102014019773B4 (de) | 2014-12-17 | 2023-12-07 | Elmos Semiconductor Se | Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mittels des Displays eines Mobiltelefons |
| DE102014019172B4 (de) | 2014-12-17 | 2023-12-07 | Elmos Semiconductor Se | Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mit einem kompensierenden optischen Messsystem |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2709487A1 (de) * | 1976-03-17 | 1977-09-22 | Nohmi Bosai Kogyo Co Ltd | Brandmelder |
| US4090178A (en) * | 1976-08-09 | 1978-05-16 | Norris Elwood G | Combination smoke detector and lamp structure |
| US4282520A (en) * | 1978-10-25 | 1981-08-04 | Shipp John I | Piezoelectric horn and a smoke detector containing same |
| JPS57100592A (en) * | 1980-12-16 | 1982-06-22 | Nakanishi Engineering Kk | Fire alarm |
| AU1893383A (en) * | 1983-03-07 | 1984-09-13 | Emhart Industries Inc. | Mount for fire sensor |
| JPS63163698A (ja) * | 1986-12-26 | 1988-07-07 | ホーチキ株式会社 | 散乱光式煙感知器 |
| US5596314A (en) * | 1994-08-01 | 1997-01-21 | Quantum Group, Inc. | Enclosure for a gas detector system |
| US5990797A (en) * | 1997-03-04 | 1999-11-23 | Bkk Brands, Inc. | Ultraloud smoke detector |
-
2001
- 2001-05-19 DE DE20108451U patent/DE20108451U1/de not_active Expired - Lifetime
-
2002
- 2002-04-29 DE DE50213808T patent/DE50213808D1/de not_active Expired - Lifetime
- 2002-04-29 EP EP02009657A patent/EP1258848B1/de not_active Expired - Lifetime
- 2002-04-29 AT AT02009657T patent/ATE441911T1/de active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1683124A4 (de) * | 2003-08-20 | 2008-01-23 | Clipsal Australia Pty Ltd | Kompakter rauchalarm |
| GB2421620A (en) * | 2004-12-23 | 2006-06-28 | Kieron T N Chapman | Fire alarm sounder |
| US9970912B2 (en) | 2012-09-27 | 2018-05-15 | Utc Fire & Security Americas Corporation, Inc. | Modular smoke detection system |
| EP2804159A1 (de) * | 2013-05-17 | 2014-11-19 | Hager Security | Elektronische Vorrichtung mit Schallemissionsmittel |
| FR3005772A1 (fr) * | 2013-05-17 | 2014-11-21 | Hager Security | Dispositif electronique muni d'un moyen d'emission sonore |
| WO2019234376A1 (en) * | 2018-06-05 | 2019-12-12 | Electronic Modular Services Ltd. | Smoke chamber as audio chamber in audible alarm devices |
| US11961380B2 (en) | 2018-06-05 | 2024-04-16 | Electronic Modular Services Ltd. | Smoke chamber as audio chamber in audible alarm devices |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50213808D1 (de) | 2009-10-15 |
| ATE441911T1 (de) | 2009-09-15 |
| DE20108451U1 (de) | 2002-10-02 |
| EP1258848A3 (de) | 2003-05-21 |
| EP1258848B1 (de) | 2009-09-02 |
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