EP0040342A1 - Détecteur de fumée - Google Patents

Détecteur de fumée Download PDF

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Publication number
EP0040342A1
EP0040342A1 EP81103313A EP81103313A EP0040342A1 EP 0040342 A1 EP0040342 A1 EP 0040342A1 EP 81103313 A EP81103313 A EP 81103313A EP 81103313 A EP81103313 A EP 81103313A EP 0040342 A1 EP0040342 A1 EP 0040342A1
Authority
EP
European Patent Office
Prior art keywords
smoke detector
smoke
measuring chamber
openings
air inlet
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
EP81103313A
Other languages
German (de)
English (en)
Other versions
EP0040342B1 (fr
Inventor
Andreas Dr. Rer. Nat. Scheidweiler
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.)
Cerberus 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
Application filed by Cerberus AG filed Critical Cerberus AG
Priority to AT81103313T priority Critical patent/ATE25438T1/de
Publication of EP0040342A1 publication Critical patent/EP0040342A1/fr
Application granted granted Critical
Publication of EP0040342B1 publication Critical patent/EP0040342B1/fr
Expired 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
    • 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 at least one smoke measurement chamber, which has a base plate with an upper surface intended for mounting on a ceiling and a housing attached to the base plate and hanging around the smoke measurement chamber and which has openings for the entry of the surrounding air into the smoke measurement chamber.
  • Smoke detectors have proven particularly useful for detecting fires at an early stage because they respond to a fire parameter that occurs very early. For a smoke detector to respond, it is necessary that smoke; or, physically speaking, a fire aerosol into which smoke detectors penetrate. Transport problems play an important role here. The occurrence of smoke at the fire site is not sufficient to trigger the smoke detector and trigger an alarm. This also requires that a sufficient amount of smoke is transported into the measuring chamber of the smoke detector.
  • the smoke or aerosol particles can then be detected in the measuring chamber in a known manner, for example by means of the scattered light (optical smoke detector) emerging from a light source or by changing the current in an ionization chamber (ionization fire detector) or by other methods den, for example measuring the change in conductivity, humidity or the ion density of the room air.
  • the energy required to transport the smoke into the measuring chamber is in most cases supplied by the heat generated during the oxidation.
  • the measuring chamber is largely closed in order to eliminate the influence of stray light as far as possible.
  • a cover is provided in the stray light smoke detector of JP-A 52-133 797, which automatically closes the smoke entry openings as soon as the signal emitted by the photodetector exceeds a predetermined threshold value. If the signal was caused by stray light, an alarm is suppressed and the smoke inlets are automatically opened again to make the detector ready for operation again.
  • the main aim was to make the measuring chamber largely open to the surrounding atmosphere in order to ensure that the fire aerosol could enter unhindered.
  • the measuring chamber is separated from the outside atmosphere only by a grid-like hood or a hood with relatively large grid-like openings.
  • a major disadvantage of the previously known smoke detectors is that specially adapted detectors have to be developed for each area of application in order to ensure that the fire aerosols enter the fire detector optimally for different environmental conditions. This leads to complex manufacturing methods, an unnecessarily large inventory and unnecessary replacement of the detector inserts when the environmental conditions change at the place of use (elimination or occurrence of dust, etc.).
  • the object of the invention is to eliminate the disadvantages of the previously known smoke detectors and, in particular, to create a smoke detector which can be easily adapted to different environmental conditions. It is also an object of the invention to enable in a structurally simple manner that the smoke detectors allow optimal entry of fire aerosol into the smoke measurement chamber under the respective environmental conditions while at the same time optimally preventing the occurrence of dust.
  • the smoke detector according to the preamble of claim 1 has a manually adjustable device for changing the air inlet openings.
  • the manually adjustable device is configured so that the adjustment of the air access ports only from the inside of M elders or from the outside is only possible by means of a special tool.
  • the manually adjustable device is designed in such a way that it changes the outer air access openings of the fire detector.
  • the manually adjustable device is designed in such a way that it changes the inner air inlet openings or that the adjustment of the device simultaneously changes the inner and outer air inlet openings of the smoke detector.
  • a further preferred embodiment of the invention is that the manually adjustable device is set up in such a way that it can be changed in stages and that the setting of the device can be read from the outside on a marking.
  • the ionization fire detector shown in Fig. 1 consists of a base part 1 and a detector insert 2.
  • the base part 1 has a recess on the side, which an alarm indicator lamp 3, e.g. contains a light emitting diode.
  • the detector insert 2 has a housing consisting of a cylindrical or slightly conical sleeve 4 and a lower cover 5. Between the sleeve 4 and the cover 5 there is an annular slot 13 for the entry of air into the interior of the housing.
  • a cylindrical web 12 is provided on the inside of the cover, through which the inflowing air is braked and blocked before it is conducted into the interior of the housing.
  • a carrier plate 6 made of insulating material is attached, on which all other components are mounted.
  • a central bore contains a metal stamp 7, which carries a disk-shaped electrode 8 with a radioactive preparation 9.
  • a counterelectrode 11 on the underside of the carrier plate 6 there is also a counterelectrode 11 in the form of a wire mesh with numerous small openings, which surrounds the inner electrode 8 and protects it from contact.
  • the center electrode 8 and the counter electrode 11 define the ionization chamber 10.
  • a known electrical circuit for evaluating the ion current Modification of the chamber 10 can be attached, which can contain a reference ionization chamber which is almost completely sealed off from the outside atmosphere and which is connected in series with the ionization chamber 10 in a known manner.
  • the cover 5 of the housing is advantageously designed to be removable from the sleeve 4 in order to facilitate cleaning.
  • Figure 2 shows a section of a further embodiment of a fire detector with the same technical advantages, in which there is a projection 16 on the inner wall of the housing 4, which ensures a further deflection of the incoming air.
  • a displaceable cylinder 17 is located on the inside of the web 12, which either adheres to the inner wall of the cylindrical web 12 by a certain preload, or which springs (not shown) at several points on the outside of the circumference Web 12 is attached.
  • the inner inlet opening 2 0 of the R is also changed by the axial displacement of the cylinder 17.
  • 12 grooves can be provided on the inside of the web, engage in the corresponding projections of the cylinder 17, or corresponding grooves can be provided on the outside of the web 12, in which corresponding projections of the fastening springs engage.
  • Figure 3 shows a section of the cross section of another embodiment of a fire alarm with the same technical advantages, in which a projection 16 is attached to the inside of the sleeve 4, which causes a further deflection of the incoming air.
  • a cylinder ring 18 provided with a flange 19, which is axially displaceable on the web 12.
  • grooves are provided on the web, in which corresponding projections of the cylinder ring 18 can engage.
  • the outer inlet opening 13 is simultaneously changed by the flange 19 and the inner inlet opening 20 by the upper edge of the cylinder ring 18.
  • fire detectors with an outer and inner part serving for air deflection for example the fire detector according to CH-PS 475 614
  • the entry openings can also be changed in such a way that. that parts of the outer and inner envelopes, which are opposite one another, touch one another and have air inlet openings.
  • the openings are arranged in such a way that twisting the envelopes relative to one another means enlarging or reducing the size of the openings.
  • twisting the envelopes relative to one another means enlarging or reducing the size of the openings.
  • a part of the openings on parts of the envelope that do not touch each other can be retained.

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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Fire Alarms (AREA)
  • Fats And Perfumes (AREA)
EP81103313A 1980-05-09 1981-05-02 Détecteur de fumée Expired EP0040342B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103313T ATE25438T1 (de) 1980-05-09 1981-05-02 Rauchmelder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3641/80A CH648943A5 (de) 1980-05-09 1980-05-09 Rauchmelder.
CH3641/80 1980-05-09

Publications (2)

Publication Number Publication Date
EP0040342A1 true EP0040342A1 (fr) 1981-11-25
EP0040342B1 EP0040342B1 (fr) 1987-02-04

Family

ID=4260347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103313A Expired EP0040342B1 (fr) 1980-05-09 1981-05-02 Détecteur de fumée

Country Status (10)

Country Link
US (2) US4384488A (fr)
EP (1) EP0040342B1 (fr)
JP (1) JPS6033514Y2 (fr)
AT (1) ATE25438T1 (fr)
AU (1) AU541729B2 (fr)
CA (1) CA1150381A (fr)
CH (1) CH648943A5 (fr)
DE (1) DE3175913D1 (fr)
DK (1) DK113281A (fr)
NO (1) NO153024C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132969A1 (fr) * 1983-07-04 1985-02-13 Martin Terence Cole Appareils détecteurs de fumée
EP0559065A1 (fr) * 1992-03-03 1993-09-08 Wagner Alarm- und Sicherungssysteme GmbH Dispositif d'indication d'incendie
EP3364389A1 (fr) 2017-02-16 2018-08-22 Heim, Mark Avertisseur de danger comprenant une ouverture de passage d'air pouvant être recouverte

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU573594B2 (en) * 1983-07-04 1988-06-16 Vision Systems Limited Smoke detection apparatus
IE904564A1 (en) * 1990-12-17 1992-06-17 E I Company Ltd Smoke alarm
US5195648A (en) * 1991-10-21 1993-03-23 Harris R G Molded snap-together connector
US5420440A (en) * 1994-02-28 1995-05-30 Rel-Tek Corporation Optical obscruation smoke monitor having a shunt flow path located between two access ports
GB2322727A (en) * 1997-02-27 1998-09-02 Fulleon Ltd Sounder device
GB9906784D0 (en) * 1999-03-25 1999-05-19 Coventry University Enterprise Detector
US8797724B2 (en) * 2012-09-11 2014-08-05 Tyco Fire & Security Gmbh Notification appliance enclosure
GB2537940B (en) 2015-05-01 2018-02-14 Thorn Security Fire detector drift compensation
CN110322658B (zh) * 2019-08-02 2024-01-30 四川赛科安全技术有限公司 一种顶式反向进烟迷宫结构及其实现方法
US11238716B2 (en) * 2019-11-27 2022-02-01 Ningbo Weilaiying Electronic Technology Co., Ltd Photoelectric smoke fire detection and alarming method, apparatus and system
US11972676B2 (en) * 2021-10-25 2024-04-30 Honeywell International Inc. Initiating a fire response at a self-testing fire sensing device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH551057A (de) * 1973-04-17 1974-06-28 Cerberus Ag Ionisationsfeuermelder.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1319526A (en) * 1919-10-21 Ventilator
US2489011A (en) * 1946-04-23 1949-11-22 Fred A Dahlin Roof ventilator
GB617037A (en) * 1946-09-26 1949-01-31 Frederick Charles Stewart Improvements in air distributor devices
US2791170A (en) * 1953-12-28 1957-05-07 Anemostat Corp Air outlet device for ventilating apparatus
US3495521A (en) * 1968-05-08 1970-02-17 Richard N Foster Manual adjustable control for air valve dampers
US3903419A (en) * 1973-04-20 1975-09-02 Fire Alert Company Combustion products detector assembly and method of operation
JPS6042996B2 (ja) * 1975-09-11 1985-09-26 株式会社東芝 通貨取引装置
US4220862A (en) * 1978-01-13 1980-09-02 General Electric Company Ionization chamber for a smoke detector having an improved arrangement for capturing airborne combustion products
FR2430612A1 (fr) * 1978-07-05 1980-02-01 Ugon Pierre Chambre d'ionisation reglable

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH551057A (de) * 1973-04-17 1974-06-28 Cerberus Ag Ionisationsfeuermelder.

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BULLETIN DES SCHWEIZERISCHEN ELEKTROTECHNISCHEN VEREINS, Band 43, Heft 23, November 1952, ZÜRICH (CH) MEILI: "Ionisations-Fernmelder", Seiten 933-939 *
ELECTRONIQUE INDUSTRIELLE, Heft 79, Dezember 1964, PARIS (FR) J. HENRY: "La détection électronique des incendies", Seiten 437-441 *
PATENTS ABSTRACTS OF JAPAN, Band 2, Heft 17,6, Februar 1978, Seite 10942 E 77, Section E & JP - A - 52 133797 (MATSUSHITA DENKO K.K.), 11.9.1977 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132969A1 (fr) * 1983-07-04 1985-02-13 Martin Terence Cole Appareils détecteurs de fumée
EP0559065A1 (fr) * 1992-03-03 1993-09-08 Wagner Alarm- und Sicherungssysteme GmbH Dispositif d'indication d'incendie
EP3364389A1 (fr) 2017-02-16 2018-08-22 Heim, Mark Avertisseur de danger comprenant une ouverture de passage d'air pouvant être recouverte
WO2018149713A1 (fr) 2017-02-16 2018-08-23 HEIM, Mark Avertisseur de danger à ouverture d'aération pouvant être recouverte

Also Published As

Publication number Publication date
CH648943A5 (de) 1985-04-15
US4475390A (en) 1984-10-09
US4384488A (en) 1983-05-24
ATE25438T1 (de) 1987-02-15
NO153024B (no) 1985-09-23
CA1150381A (fr) 1983-07-19
JPS5710097U (fr) 1982-01-19
EP0040342B1 (fr) 1987-02-04
DE3175913D1 (en) 1987-03-12
NO811586L (no) 1981-11-10
AU541729B2 (en) 1985-01-17
DK113281A (da) 1981-11-10
AU7011381A (en) 1981-11-12
NO153024C (no) 1986-01-02
JPS6033514Y2 (ja) 1985-10-05

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