US20050128098A1 - Device and method to detect the onset of fires - Google Patents

Device and method to detect the onset of fires Download PDF

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Publication number
US20050128098A1
US20050128098A1 US11/009,426 US942604A US2005128098A1 US 20050128098 A1 US20050128098 A1 US 20050128098A1 US 942604 A US942604 A US 942604A US 2005128098 A1 US2005128098 A1 US 2005128098A1
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US
United States
Prior art keywords
film
rubber
feed line
elastic part
disposed
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.)
Abandoned
Application number
US11/009,426
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English (en)
Inventor
Manfred Russwurm
Hauke Dittmer
Thomas Warnecke
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.)
Minimax GmbH and Co KG
Original Assignee
Minimax GmbH and Co KG
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 Minimax GmbH and Co KG filed Critical Minimax GmbH and Co KG
Assigned to MINIMAX GMBH & CO. KG reassignment MINIMAX GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WARNECKE, THOMAS, DITTMER, HAUKE, RUSSWURM, MANFRED
Publication of US20050128098A1 publication Critical patent/US20050128098A1/en
Abandoned 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 device to detect an onset of a fire and to a method for cleaning the device.
  • Such devices can be utilized wherever the onset of fires is possible in rooms or in electronic equipment.
  • the device can also be utilized wherever there are explosion zones according to ATEX95 and 137, for example, in dust-laden industries (lumber and mill industries).
  • ATEX95 and 137 for example, in dust-laden industries (lumber and mill industries).
  • air samples from the room or from the equipment are continuously fed to a fire-parameter detector via a feed line that is installed in the room or else in the equipment to be monitored and that has several suction openings.
  • an evaluation unit that is electronically connected to the detector emits a signal according to specified criteria.
  • feed line does not refer exclusively to pipes that have been installed for room-protection purposes and that lead to an air outlet in the housing of the detector and that draw in room air or equipment-cooling air through suction openings. Rather, the term “feed line” can also refer to a suction funnel, a collecting hood or a T-shaped pipe hood which, for instance, is placed onto the air-outlet vent of an electronic device, thus being arranged in the main cooling stream of the device.
  • fire-recognition parameter refers to physical parameters—such as, for instance, the ambient temperature, the fraction of solids, liquids or gases in the ambient air or the ambient radiation—that undergo measurable changes in an area where the onset of a fire occurs.
  • German patent specification DE 196 05 638 C1 discloses a method and a device to detect the onset of fires in rooms or in electronic equipment, comprising a detector for recognizing a fire parameter, having at least one feed line installed in the room or else in the equipment to be monitored and several suction openings through which samples of room air or equipment-cooling air are continuously supplied.
  • An evaluation unit is electronically connected to a detector and, according to specified criteria, it emits a signal if the detector senses a fire-recognition parameter.
  • a film is glued over them so as to reduce the effective diameter of the suction openings. This device has the drawback that dust tends to constantly accumulate in the holes of the suction opening.
  • the feed line can also consist of one pipe which, however, is then considerably shorter, so that all of the suction openings can be the same size.
  • the feed line can also consist of one pipe which, however, is then considerably shorter, so that all of the suction openings can be the same size.
  • their diameters have to be adapted since the total suction surface area can only fall within a narrow range.
  • the device according to the invention provides for the suction openings in the feed line—which can be of the same diameter and which can be created by drilling—to have a rubber-elastic part with an internal opening having a smaller diameter.
  • the rubber-elastic part seals the opening of the feed line not only so that it is gas-tight but it also ensures that the film can be stressed on both sides, in other words, a gas stream can flow into the feed line through the hole in the film and a gas stream can flow out of the feed line without the rubber-elastic part exhibiting any leakage vis-à-vis the feed line.
  • the film is advantageous to arrange the film on top of the rubber-elastic part.
  • the dust particles that have accumulated in the film are removed by employing a fan to blow a gas stream through the opening in the film from the inside to the outside. It is advantageous to perform this reversing of the air stream at regular intervals.
  • a timer can be employed so that the air stream is blown at prescribed time intervals from the inside against the film, thereby ensuring continuous cleaning.
  • the film is advantageous for the film to be provided with a non-stick coating. Furthermore, it is advantageous for certain areas of the suction openings to be additionally fitted with a filter. In order to do so, a filter may be used in the area of the suction openings, for example at a ventilation extension disposed outside of the rubber-elastic part. This prevents dust from penetrating the feed line, so that no dust concentrations can be formed that could create an explosive mixture.
  • the present invention offers two modalities for protecting the suction openings against dirt accumulation. Since the outer diameter of the insert with the elastic membrane is considerably larger than the suction bores, a dust filter can be installed on the outside over the suction opening. For this purpose, a dust filter is integrated into the elastic membrane.
  • the air-stream monitoring system continuously monitors the state of this dust filter to see if it is functioning properly.
  • the dust filter can also be placed at a region outside of the rubber-elastic part such as at a lation extension disposed outside of the rubber-elastic part an area of a suction opening so as to enlarge the surface area of the filter.
  • the filter is either cleaned by countercurrent purging or by cleaning, or else it is replaced.
  • An advantage of this solution according to the invention is that all of the suction bores receive an insert that has a thin membrane having good sliding properties in the area of the suction borehole. According to the present invention, the accumulation of dust in the area of the bore is largely prevented. Another advantage of this invention lies in the fact that the thin membrane has a certain elasticity. Should dust accumulate in the area of the suction openings due to certain environmental conditions that would impair the proper functioning of the “device to detect the onset of fires”, the suction openings can be easily cleaned by introducing purging air into the feed line, since the increased pressure causes the membrane to bulge towards the outside, as a result of which the dust comes off easily.
  • the purging air can be introduced by means of the suction fan using compressed air at the air outlet or by means of a bypass between the fan and the first suction opening. Another possibility consists of reversing the rotational direction of the suction fan. In this manner, the feed line becomes a pressure line and the air flowing out cleans the suction openings. This can also be done automatically. In this case, however, it should be noted that the fire detection is interrupted during the purging phase.
  • FIG. 1 shows a sectional view of a feed line with a rubber-elastic part, lation extension and filter disposed at the ventilation extension;
  • FIG. 2 shows a sectional view of a rubber-elastic part, with a film on the inside;
  • FIG. 3 shows a feed line with a suction opening
  • FIG. 4 shows a rubber-elastic part with filter and a film inserted into the center.
  • FIG. 3 shows a feed line 3 having a suction opening 5 . Dust particles can pass through this suction opening 5 without problems, so that dirt is continuously accumulating in the detectors. Moreover, under certain circumstances, the diameter of the opening 5 has to be adapted to the desired flow cross section.
  • FIG. 2 shows a rubber-elastic part 1 having a groove 8 for attachment purposes, whereby the internal diameter is provided with a film 2 that has an opening 4 for the air stream.
  • the film 2 can be stressed equally on both sides.
  • the rubber-elastic part 1 is inserted into the feed line 3 .
  • FIG. 1 shows a feed line 3 into which a rubber-elastic part 1 has been inserted which has a film 2 with an opening 4 on its upper edge.
  • a ventilation extension 9 is disposed outside of the rubber-elastic part to provide some protection to the rubber-elastic part while enabling air to flow to the rubber-elastic part.
  • the opening 4 of the film 2 is protected against coarse particles by means of a filter 7 placed at an opening of the veniltation extension 9 .
  • FIG. 4 shows a rubber-elastic part 1 that is fitted with a filter 6 over the suction opening 4 . Severe dirt accumulation in all of the parts depicted in FIG. 1, 2 and 4 is prevented since the air stream through the opening 4 can be easily reversed, which causes any dust deposits present to be carried to the outside. Moreover, the installation of the filter 6 , 7 prevents coarse particles from penetrating the system.
  • the present invention opens up a wide range of application possibilities, particularly in dust-laden sectors.
  • the advantages of fire detection with multi-sensor suction detectors can be utilized in dust-laden sectors through the use of filters and through the convenient cleaning by means of membranes.

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)
  • Fire Alarms (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
US11/009,426 2003-12-13 2004-12-10 Device and method to detect the onset of fires Abandoned US20050128098A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10358531A DE10358531A1 (de) 2003-12-13 2003-12-13 Vorrichtung und Verfahren zum Detektieren von Entstehungsbränden
DEDE10358531.1 2003-12-13

Publications (1)

Publication Number Publication Date
US20050128098A1 true US20050128098A1 (en) 2005-06-16

Family

ID=34485375

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/009,426 Abandoned US20050128098A1 (en) 2003-12-13 2004-12-10 Device and method to detect the onset of fires

Country Status (6)

Country Link
US (1) US20050128098A1 (fr)
EP (1) EP1542188B1 (fr)
CN (1) CN100501788C (fr)
AT (1) ATE335266T1 (fr)
DE (2) DE10358531A1 (fr)
RU (1) RU2004136274A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2270762A3 (fr) * 2009-06-29 2012-01-04 ista International GmbH Détecteur de fumée et procédé de contrôle des impuretés sur les ouvertures de passage des fumées
US11543057B2 (en) 2019-07-09 2023-01-03 Honeywell International Inc. Universal pipe sleeve junction for an aspirated smoke detection system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101618383B (zh) * 2009-07-24 2013-01-09 上海华魏光纤传感技术有限公司 自动清洁火焰探测器的装置及方法
PL2469492T3 (pl) 2010-11-29 2013-10-31 Minimax Gmbh & Co Kg Sposób i urządzenie do wykrywania pożarów w objętościach
DE202010017579U1 (de) 2010-11-29 2012-03-02 Minimax Gmbh & Co. Kg Vorrichtung zur Branddetektion in Volumina
CN116758694B (zh) * 2023-06-16 2023-12-08 广东钧逸建筑工程有限公司 一种消防自动报警鸣叫装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4814766A (en) * 1987-12-07 1989-03-21 Domingue Willard A Fire alarm and heat detection system and apparatus
US4937562A (en) * 1987-12-26 1990-06-26 Hochiki Corp. Moisture-proof ionization smoke detector
USRE33282E (en) * 1980-11-24 1990-07-31 Bic Corporation Liquid gas-operated lighter
US5687450A (en) * 1994-09-10 1997-11-18 Stein & Co. Gmbh Machine, such as a vacuum cleaner, which exhausts a clean gas, which machine has a protective bumper
US6914535B2 (en) * 2002-01-11 2005-07-05 Hochiki Corporation Light scattering type smoke sensor
US6943691B2 (en) * 2001-01-19 2005-09-13 Bill Chambers Tamper indicator for a smoke detector
US6985081B2 (en) * 2001-05-25 2006-01-10 Wagner Alarm-Und Sicherungssysteme Gmbh Device and method for detecting fire sources of gas impurities

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH521649A (de) * 1970-07-31 1972-04-15 Cerberus Ag Feuermeldeeinrichtung
DD200961A1 (de) * 1981-10-01 1983-06-22 Werner Bose Dichtungsmuffe fuer kabeleinfuehrung in elektrische geraete
DE3348107C2 (en) * 1983-08-30 1988-01-21 Securiton Ag, Zollikofen, Bern, Ch Smoke suction system of a line smoke alarm
US4975688A (en) * 1988-09-22 1990-12-04 Gonzales Ronald A Particulate detector disabling and protecting system
DE29518042U1 (de) * 1995-11-14 1996-01-25 Wagner Alarm Sicherung Branddetektor
DE19605638C5 (de) * 1996-02-15 2004-10-14 Wagner Alarm- Und Sicherungssysteme Gmbh Verfahren und Vorrichtung zum Detektieren von Entstehungsbränden
DE19605842C1 (de) * 1996-02-16 1997-04-24 Wagner Alarm Sicherung Vorrichtung und Verfahren zum Enteisen einer Ansaugöffnung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33282E (en) * 1980-11-24 1990-07-31 Bic Corporation Liquid gas-operated lighter
US4814766A (en) * 1987-12-07 1989-03-21 Domingue Willard A Fire alarm and heat detection system and apparatus
US4937562A (en) * 1987-12-26 1990-06-26 Hochiki Corp. Moisture-proof ionization smoke detector
US5687450A (en) * 1994-09-10 1997-11-18 Stein & Co. Gmbh Machine, such as a vacuum cleaner, which exhausts a clean gas, which machine has a protective bumper
US6943691B2 (en) * 2001-01-19 2005-09-13 Bill Chambers Tamper indicator for a smoke detector
US6985081B2 (en) * 2001-05-25 2006-01-10 Wagner Alarm-Und Sicherungssysteme Gmbh Device and method for detecting fire sources of gas impurities
US6914535B2 (en) * 2002-01-11 2005-07-05 Hochiki Corporation Light scattering type smoke sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2270762A3 (fr) * 2009-06-29 2012-01-04 ista International GmbH Détecteur de fumée et procédé de contrôle des impuretés sur les ouvertures de passage des fumées
US11543057B2 (en) 2019-07-09 2023-01-03 Honeywell International Inc. Universal pipe sleeve junction for an aspirated smoke detection system
US11841096B2 (en) 2019-07-09 2023-12-12 Honeywell International Inc. Universal pipe sleeve junction for an aspirated smoke detection system

Also Published As

Publication number Publication date
EP1542188A1 (fr) 2005-06-15
RU2004136274A (ru) 2006-05-20
CN1627330A (zh) 2005-06-15
EP1542188B1 (fr) 2006-08-02
ATE335266T1 (de) 2006-08-15
DE502004001093D1 (de) 2006-09-14
CN100501788C (zh) 2009-06-17
DE10358531A1 (de) 2005-07-28

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MINIMAX GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RUSSWURM, MANFRED;DITTMER, HAUKE;WARNECKE, THOMAS;REEL/FRAME:016289/0661;SIGNING DATES FROM 20041214 TO 20041217

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION