EP3781269B1 - Brandbekämpfungseinrichtung - Google Patents

Brandbekämpfungseinrichtung Download PDF

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Publication number
EP3781269B1
EP3781269B1 EP19707716.7A EP19707716A EP3781269B1 EP 3781269 B1 EP3781269 B1 EP 3781269B1 EP 19707716 A EP19707716 A EP 19707716A EP 3781269 B1 EP3781269 B1 EP 3781269B1
Authority
EP
European Patent Office
Prior art keywords
ignition
fire
current
circuit
fighting
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.)
Active
Application number
EP19707716.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3781269A1 (de
EP3781269C0 (de
Inventor
Martin FRIESSNER
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.)
Fogtec Brandschutz GmbH and Co KG
Original Assignee
Fogtec Brandschutz 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 Fogtec Brandschutz GmbH and Co KG filed Critical Fogtec Brandschutz GmbH and Co KG
Publication of EP3781269A1 publication Critical patent/EP3781269A1/de
Application granted granted Critical
Publication of EP3781269B1 publication Critical patent/EP3781269B1/de
Publication of EP3781269C0 publication Critical patent/EP3781269C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/04—Control of fire-fighting equipment with electrically-controlled release
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/006—Extinguishants produced by combustion

Definitions

  • the subject matter relates to a fire-fighting device, a system with a fire-fighting device and a method for operating such a system.
  • From the EP 1 609 507 A1 is a fire extinguishing device for generating inert gases.
  • the object of the invention was to provide a fire-fighting system which ensures the safe activation of all generators along a common control line.
  • a generator is provided with which a fire-fighting agent can be applied.
  • a generator can, for example, be a cartridge in which fire-fighting agent is stored. The cartridge can be activated and the fire-fighting agent released via an ignition pulse.
  • the generator it is possible for the generator to be opened and the fire-fighting agent released via an exothermic reaction.
  • an aerosol generator can be used which releases a solid aerosol when ignited. Such generators are conventionally known.
  • An ignition device is located in the generator, particularly in the generator cartridge. This ignition device can be triggered by an electrical ignition pulse, also known as ignition current. The moment the ignition device is triggered, a gas pressure is built up, which releases the fire-fighting agent.
  • the ignition device To ignite the ignition device, it can be controlled via a two-pole control connection.
  • the ignition current and the ignition voltage can be applied to the control connection. If the ignition current exceeds a limit value, the ignition device can trigger and activate the generator.
  • the bridging circuit With the help of the bridging circuit, a Triggering of the ignition device can be detected.
  • the bridging circuit is designed such that when the ignition device is triggered, it closes a switch and thereby short-circuits the two poles of the control connection or connects them with a low resistance. This means that if the ignition device is triggered, the switch bridges the ignition device and the ignition current can still flow between the poles of the control connection.
  • the switch is in particular such that it is closed after a single activation when an ignition voltage is applied.
  • An activation criterion for activating the bridging circuit can be a resistance across the ignition device.
  • the criterion can be met, so that the switch is then closed.
  • the ignition device is then bridged via the switch and the ignition current flows through the fire-fighting device to upstream and/or downstream fire-fighting devices and can ensure reliable ignition of the ignition devices there. This ensures that fire-fighting devices can also be triggered where the ignition device may be sluggish and/or require an ignition current that is applied for a longer period in order to trigger reliably.
  • the bridging circuit is electrically connected in parallel to the control terminal.
  • the bridging circuit is thus connected to the poles of the control terminal in parallel to the ignition means.
  • the bridging circuit can be used to monitor an ohmic resistance across the ignition device. In the non-triggered state, a current flows almost unhindered across the ignition device.
  • the ohmic resistance is close to 0 ⁇ , in particular not more than 3 ⁇ , in particular between 1 and 4 ⁇ .
  • the bridging circuit thus monitors a very low resistance across the Ignition means are detected. However, immediately after the ignition means are ignited, a high resistance, in particular greater than 3 ⁇ , preferably greater than 10 ⁇ , can be measured across the ignition means. Such a high resistance can cause the bridging circuit to be activated and close the switch.
  • the bridging circuit preferably has a current mirror.
  • the current mirror is connected asymmetrically between the poles of the control connection. This means that the first path (reference path) of the current mirror is connected to a pole of the control connection via a resistor of almost 0 ⁇ and the second path (following path) of the current mirror is connected directly to this pole of the control connection.
  • the first path of the current mirror can be influenced depending on the current flow via the ignition means, which also flows via the resistor.
  • a switch can be switched via the second path of the current mirror due to the dependence of the second path of the current mirror on its first path.
  • the switch is an electronic switch.
  • the electronic switch is preferably a TRIAC or thyristor.
  • This switch is preferably connected via the second path of the current mirror.
  • the voltage at the gate connection of the switch increases so that it becomes conductive. This is due to the asymmetry of the two paths of the current mirror.
  • the generator is an aerosol generator.
  • this is a solid aerosol generator.
  • Such a generator has a solid quantity of approximately 30g to 500g, which quantity is released when the ignition agent is ignited.
  • the aerosol is suitable for binding free radicals of the fire and thus extinguishing a fire.
  • the ignition means is a pyrotechnic ignition means.
  • a pyrotechnic ignition means is ignited via an electrical pulse, after which an exothermic, pyrotechnic reaction takes place. This reaction builds up a gas pressure within the generator, which means that the aerosol can be released from the generator.
  • the ignition means is a resistance wire.
  • This resistance wire has a defined electrical resistance. If an ignition current is applied to the resistance wire, it heats up.
  • the resistance wire is preferably connected between the poles of the control connection. When the resistance wire heats up, the ignition means is ignited and the generator is triggered.
  • the ignition of the ignition means via the resistance wire can take different lengths of time. However, if an ignition current is applied to fire-fighting devices connected in series, this can lead to the ignition point of the respective ignition means being different. If an ignition means is triggered, the ignition current can be interrupted. If this is the case, this can lead to the other ignition means along the series connection of several fire-fighting devices no longer triggering reliably. For this reason, the bridging circuit in question with bridging of the ignition means in the event of ignition is proposed.
  • the above-mentioned problem occurs more frequently in environments in which the input voltage at the control connection is variable.
  • the proposed bridging circuit enables reliable ignition, particularly in voltage ranges between 10V and 40V. This means that a defined voltage does not have to ensure a defined ignition current, but rather different voltages can ensure reliable triggering of all ignition devices along a series connection of several fire-fighting devices.
  • the voltage range is formed in particular between 16.8V and 30V.
  • the Voltage band is preferably formed between 10V and 40V, in particular between 15V and 35V, particularly preferably between 16V and 31V, in particular between 16.8V and 30V.
  • a circuit for storing an ignition process is arranged electrically in series with the ignition means.
  • the circuit has at least one fuse that is triggered during an ignition process and a switch that bypasses the fuse.
  • the fuse is implemented in particular by a fuse.
  • the fuse can trigger.
  • the switch can be designed in such a way that it is closed when ignition voltage is applied, but is open when lower voltages are applied. It is thus possible for the circuit for storing the ignition process to be switched on at a low Measuring current that leads to a low applied voltage represents an interruption in the circuit or at least a defined resistance, and no or only a lower measuring current flows than with an intact fuse. This makes it possible to detect whether at least one fire-fighting device has been triggered.
  • the voltage and current can be so high that the switch in the circuit for storing the ignition process is closed and the ignition current can flow through the switch instead of the fuse. Ignition can then take place at other ignition devices. This is particularly relevant because the fuse is triggered when an ignition device is ignited for the first time. To prevent the circuit for storing the ignition process from suppressing the ignition current via the other fire-fighting devices along the series circuit, the switch is closed when the ignition voltage and ignition current are present.
  • the fire-fighting device In the event of a fire, i.e. when a fire alarm system reports a fire and the fire is to be extinguished, the fire-fighting device is switched to ignition mode. In ignition mode, ignition voltage and ignition current are present at the inputs of the control connection. If several fire-fighting devices are connected in series, the same ignition current is present at all fire-fighting devices. This ignition current is dimensioned so that it is normally large enough to trigger the ignition devices.
  • the monitoring case In addition to the fire case, there is also the monitoring case. In this case, no fire is reported, but it is only to be monitored whether the fire-fighting equipment is still properly connected to the control circuit, e.g. fire alarm system or fire-fighting system, via its control connections.
  • a small measuring current which is lower than an ignition current, in particular an order of magnitude lower than an ignition current, is applied to the poles of the control connection. This measuring current does not lead to the ignition device being ignited and flows about the ignition devices.
  • the circuit for storing the ignition process is set up in such a way that it blocks in the case of the measuring current or represents a defined resistance. Then, with the help of this circuit, it can be determined that at least one fire-fighting device along a row has ignited.
  • the switch In the event of a fire, however, the switch remains closed and bridges the opened fuse so that the ignition current can continue to flow through the circuit to store the ignition process.
  • Another aspect is a system with a control circuit, in particular an output of a fire alarm system or fire fighting system and at least two fire fighting devices connected electrically in series to the control circuit.
  • a control circuit in particular an output of a fire alarm system or fire fighting system and at least two fire fighting devices connected electrically in series to the control circuit.
  • an ignition current is applied to the series connection of the fire fighting devices.
  • the ignition current is dimensioned so that the ignition devices can ignite.
  • only a measuring current is applied, which can flow almost unhindered through the ignition devices without triggering them.
  • an ignition device ignites and creates a short circuit during ignition.
  • Such a triggering case can also be detected with the circuit for storing the ignition process.
  • the circuit for storing the ignition process remains open and thus no measuring current or a measuring current can flow across a defined resistance.
  • a further aspect is a method for operating such a system.
  • the control circuit In a monitoring mode, the control circuit provides a measuring current that is lower than the ignition current for igniting the ignition means.
  • the control circuit In an ignition mode, ie in the event of a fire, the control circuit provides an ignition current. At least one ignition means of a fire-fighting device is ignited by the ignition current. Preferably, all fire-fighting devices are controlled by the Ignition current is ignited at the same time. However, this cannot be guaranteed. For this reason, it is proposed that a bridging circuit is activated by the ignition of the ignition means assigned to the bridging circuit. When the bridging circuit is activated, its switch is closed so that the ignition means is short-circuited and the ignition current can flow through the switch regardless of the state of the ignition means.
  • This bridging circuit ensures that the ignition current can flow via the ignition devices of the fire-fighting equipment connected in series until several or all of the fire-fighting equipment have ignited.
  • the circuit for storing the ignition process is activated.
  • a switch is controlled in such a way that it is open or forms a small resistance when there is a measuring current, but is closed when there is an ignition current.
  • the ignition current can therefore continue to flow unhindered through this circuit, but in monitoring mode the measuring current cannot flow or flows through a defined resistance, so that it can be determined that at least one ignition has occurred.
  • the system in question is particularly suitable in environments where a constant voltage cannot be provided. This is particularly the case with a rail vehicle, where voltages between 10V and 40V can be provided by the on-board network. All of these voltages must ensure that all fire-fighting equipment is safely ignited in the event of a fire. This is ensured by the bridging circuit in question, although different voltage levels are available for switching or ignition.
  • Fig.1 shows in a schematic block diagram a system with a control circuit 2, for example a fire alarm system or fire fighting system, to which several fire fighting devices 4, each with at least one circuit 6 having a bridging circuit and a generator 8, are connected.
  • the control circuit 2 has a digital control output with two poles 2a, 2b.
  • the fire fighting devices 4 are electrically connected in series to the control circuit 2.
  • an ignition means for example an ignition wire, may be arranged which is heated by a current flow and triggers a pyrotechnic ignition.
  • the current flow is determined by the ignition current between poles 2a, 2b.
  • an electrical interruption may occur in the ignition device, for example in the ignition wire. However, this results in the current flow between the poles 2a, 2b being interrupted.
  • the control circuit 2 is connected to the internal voltage supply of the rail vehicle, which has a relatively high fluctuation range, for example of at least 10 V.
  • This fluctuation range of the voltage leads to different currents in the ignition means of the generators 8, so that the duration of the current flow for effective ignition can be different.
  • This in particular leads to the fact that not all generators 8 along a line are triggered at the same time and thus generators 8 may not be triggered at all, as described above.
  • a circuit 6 is proposed as shown in the Fig.2 is explained in more detail by way of example.
  • the circuit 6 is shown with an ignition means 10 inside a generator 8.
  • the ignition means 10 comprises, for example, an ignition wire with a pyrotechnic charge.
  • the circuit 6 can be connected via the terminals 12a, 12b and 12c.
  • one of the circuits 6 is arranged along a row as shown in the Fig.1 shown is connected to the control circuit 2 with the terminals 12a, 12c, all other circuits 6 are connected to the control circuit 2 with the terminals 12a, 12b.
  • the circuit 6 has a
  • Bridging circuit 6a and a circuit 6b for storing an ignition process.
  • the circuit 6b is also referred to below as storage circuit 6b.
  • the bridging circuit 6a has a current mirror 14 which is connected asymmetrically to the terminals 12a, 12b via a resistor 16.
  • a thyristor or TRIAC 18 can be provided on the output side of the current mirror 14, which switches through when there is a sufficiently high voltage between the cathode 18c and the gate 18b and conductively connects the anode 18a to the cathode 18c.
  • a measuring current of up to 5mA is supplied through the series connection according to the Fig.1
  • the measuring current flows from the connection 12a via the ignition device 10 to the connection 12b and from there to the next fire-fighting device 4. This is normal operation in which ignition has not yet taken place.
  • the voltage drop across the ignition device, which is caused by the current flow is so small that the current mirror does not receive its required minimum operating voltage and thus the thyristor 18 blocks.
  • the generators 8 are to be ignited.
  • an ignition current is applied to the circuit 6 in the event of a fire.
  • the ignition current initially flows via the ignition means 10. This heats up the ignition wire in the ignition means 10 and ultimately leads to an activation of the pyrotechnic charge in the ignition means 10 and an activation of the generator 8 to dispense the aerosol.
  • the electrical connection via the ignition device 10 may break and the ignition device 10 may block an electrical connection between the terminals 12a, 12b. Due to the lack of current flow through the resistor 16, the asymmetrical Connection of the current mirror 14 so that the voltage between the collector of the current mirror 14 and the resistor 17 increases. This leads to the ignition current causing a sufficiently high voltage between the cathode 18c and the gate 18b of the thyristor 18 and the latter switching on.
  • the ignition current then flows, despite the interrupted line in the ignition device 10, via the thyristor 18 between the poles 12a and 12b.
  • This leads to all fire-fighting devices 4 connected in series being activated according to the Fig.1 are permanently supplied with the ignition current, even if individual fire-fighting devices 4 or their ignition means 10 have already ignited and caused an electrical separation.
  • the bridging circuit 6a thus ensures safe operation of all generators 8 along a line of fire-fighting devices 4 connected in series on a control circuit 2.
  • the wire in the ignition means 10 can break. However, it is also possible that the wire melts or that an electrical connection via the ignition means 10 remains in some other way even after ignition.
  • a fire-fighting device 4 with the connections 12a and 12c on the line according to Fig.1 be connected.
  • the storage circuit 6b is connected to the line.
  • a fuse 20 is provided in the storage circuit 6b, which is designed in such a way that it melts when there is an ignition current of a duration that is approximately or slightly shorter than the minimum duration for igniting an ignition means 10.
  • the fuse 20 melts and the Zener diode 22 becomes conductive due to the voltage drop across the resistor 24 and breaks down.
  • a sufficiently high voltage is applied via the resistor 27 between the cathode 28c and the gate 28b of the thyristor 28 and the latter becomes conductive.
  • a measuring current is regularly introduced into the circuit to check whether it is still functional. If all ignition devices 10 are still conductive, the measuring current flows through these ignition devices 10. This can also be the case if an ignition device 10 has already ignited, but an electrical connection has remained. In this case, the measuring current cannot determine whether or not at least one fire-fighting device 4 has been ignited.
  • the storage circuit 6b is also active. As already described, the fuse 20 melts in the event of an ignition current. A measuring current then flows through the resistor 24. However, this measuring current is too low for the Zener diode 22 to become conductive and the thyristor 28 remains closed. This means that when measuring via the series connection of the fire-fighting devices 4 along the line according to Fig.1 a measuring current is conducted at least via the resistor 24. This causes a voltage drop between the poles 2a, 2b which is measurable and, above a certain size, allows the conclusion that the memory circuit 6b is activated and the measuring current flows via the resistor 24 and not via an intact fuse 20. This makes it possible to determine that the memory circuit 6b has been activated.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Air Bags (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
EP19707716.7A 2018-04-19 2019-02-14 Brandbekämpfungseinrichtung Active EP3781269B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018109305.5A DE102018109305A1 (de) 2018-04-19 2018-04-19 Brandbekämpfungseinrichtung
PCT/EP2019/053708 WO2019201492A1 (de) 2018-04-19 2019-02-14 Brandbekämpfungseinrichtung

Publications (3)

Publication Number Publication Date
EP3781269A1 EP3781269A1 (de) 2021-02-24
EP3781269B1 true EP3781269B1 (de) 2024-07-24
EP3781269C0 EP3781269C0 (de) 2024-07-24

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ID=65576309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19707716.7A Active EP3781269B1 (de) 2018-04-19 2019-02-14 Brandbekämpfungseinrichtung

Country Status (7)

Country Link
US (1) US11786771B2 (pl)
EP (1) EP3781269B1 (pl)
CN (1) CN112041033B (pl)
DE (1) DE102018109305A1 (pl)
ES (1) ES2988834T3 (pl)
PL (1) PL3781269T3 (pl)
WO (1) WO2019201492A1 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021124381A1 (de) 2021-09-21 2023-03-23 Fogtec Brandschutz Gmbh Brandbekämpfungseinrichtung

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU814370A1 (ru) 1979-02-26 1981-03-23 Особое Конструкторское Бюро Противо-Пожарной Техники Устройство дл дистанционногоВКлючЕНи СиСТЕМы пОжАРОТушЕНи
CN1030826A (zh) 1987-07-23 1989-02-01 吴翊瑄 短线时序点火装置
DE4225330C1 (de) * 1992-07-31 1993-11-04 Bergwerksverband Gmbh Vorrichtung zum sequentiellen zuenden von elektrischen zuendern
DE4415388C1 (de) 1994-05-02 1995-04-20 Euro Matsushita Electric Works Sprengkette
US5506509A (en) * 1994-12-05 1996-04-09 Motorola, Inc. Circuit and method of measuring squib resistance
DE19638626C2 (de) 1996-09-20 1998-12-24 Amtech R Int Inc Feuerlöschanlage
DE10345462B4 (de) * 2003-09-30 2012-12-06 Infineon Technologies Ag Anordnung und Verfahren zum Ermitteln des ohmschen Widerstands eines Elements
FR2870459B1 (fr) 2004-05-19 2006-08-25 Airbus France Sas Dispositif d'extinction de feu par injection d'un gaz genere par la combustion d'un bloc pyrotechnique
CN101806260B (zh) 2010-03-04 2012-01-11 西北工业大学 一种多管并联脉冲爆震燃烧室及其点火起爆方法
CN102908742B (zh) 2011-08-02 2015-11-25 陕西坚瑞消防股份有限公司 一种气溶胶灭火装置的控制启动器
CN202191628U (zh) 2011-08-02 2012-04-18 陕西坚瑞消防股份有限公司 一种气溶胶灭火装置的控制启动器
CN202230340U (zh) 2011-09-21 2012-05-23 朱良学 一种多级级联时间交叉并行冗余点火电路
EP2748906B1 (de) * 2011-09-29 2018-11-14 Siemens Aktiengesellschaft Kurzschlussstromentlastung für submodul eines modularen mehrstufenumrichters (mmc)
CA2794357A1 (en) 2011-10-31 2013-04-30 Explosives Limited Explosive pressure activated switch
CN202605590U (zh) 2012-06-07 2012-12-19 陕西坚瑞消防股份有限公司 一种便携式灭火器的启动装置
EP2747232B1 (en) 2012-12-21 2022-07-27 General Electric Technology GmbH Method and arrangement for triggering a series spark gap
CN204612619U (zh) 2015-04-01 2015-09-02 北京优航机电技术有限公司 小功率电爆管点爆装置

Also Published As

Publication number Publication date
WO2019201492A1 (de) 2019-10-24
EP3781269A1 (de) 2021-02-24
CN112041033B (zh) 2022-12-16
US11786771B2 (en) 2023-10-17
ES2988834T3 (es) 2024-11-21
CN112041033A (zh) 2020-12-04
US20210154507A1 (en) 2021-05-27
EP3781269C0 (de) 2024-07-24
DE102018109305A1 (de) 2019-10-24
PL3781269T3 (pl) 2024-11-25

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