EP3804819A1 - Dispositif d'extinction automatique d'incendie - Google Patents

Dispositif d'extinction automatique d'incendie Download PDF

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Publication number
EP3804819A1
EP3804819A1 EP20195534.1A EP20195534A EP3804819A1 EP 3804819 A1 EP3804819 A1 EP 3804819A1 EP 20195534 A EP20195534 A EP 20195534A EP 3804819 A1 EP3804819 A1 EP 3804819A1
Authority
EP
European Patent Office
Prior art keywords
fire
extinguishing agent
extinguishing
fire extinguishing
pressure
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.)
Withdrawn
Application number
EP20195534.1A
Other languages
German (de)
English (en)
Inventor
Martin Ziermann
Stefan GILCH
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.)
ZG Sicherheitstechnik GmbH
Original Assignee
ZG Sicherheitstechnik GmbH
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 ZG Sicherheitstechnik GmbH filed Critical ZG Sicherheitstechnik GmbH
Publication of EP3804819A1 publication Critical patent/EP3804819A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
    • A62C35/023—Permanently-installed equipment with containers for delivering the extinguishing substance the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
    • A62C35/11—Permanently-installed equipment with containers for delivering the extinguishing substance controlled by a signal from the danger zone
    • A62C35/13—Permanently-installed equipment with containers for delivering the extinguishing substance controlled by a signal from the danger zone with a finite supply of extinguishing material
    • 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
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
    • A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
    • A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator

Definitions

  • the present invention relates to preventive fire protection, in particular automatically triggering fire extinguishing devices for private households.
  • a fire in a private household can endanger human life to a considerable extent and also represents a significant material risk for those affected.
  • fire protection regulations are constantly being strengthened and fire alarms for early warning of residents are now widely prescribed by law.
  • the alarm tones generated by these fire alarms in the event of a fire are often sufficient to give the residents the opportunity to leave the building in good time or to use hand-held fire extinguishers to prevent the fire from spreading.
  • there is still the risk that the alarm tones may not be heard or that older people or small children in particular cannot react adequately to them.
  • such fire alarms do not prevent the potentially considerable property damage caused by a fire.
  • the GB 2 561 831 A discloses a fire protection device which is inserted into a recess in a building ceiling, wherein an extinguishing agent tank can be arranged within the building ceiling.
  • an electronically controlled valve opens to the extinguishing agent tank, and one Extinguishing agent liquid is distributed from the extinguishing agent tank via a sprinkler head in the interior of the building below the device.
  • the US 2018/0099170 A1 discloses an automatic fire extinguisher for local use in building interiors.
  • An extinguishing agent is stored in a storage bladder of the fire extinguishing device and, when a fire is detected, is sprayed via an integrally installed, electrically operated pump to extinguish the fire.
  • the WO 02/066460 A1 discloses a spherical fire extinguishing device in which a pyrotechnic charge to generate gas is ignited as a result of a fire being detected by an electronic fire alarm. The expanding explosion gases are then used to force an extinguishing agent through a plurality of nozzles in order to contain the fire.
  • the patent application WO 2018/148 354 A1 relates to a fire extinguishing system for a protected space, such as a server room of a data center, in which a delay in the extinguishing effect, which can result from an insufficient flow rate of propellant from an external tank, is to be avoided.
  • the fire extinguishing device comprises an external tank body which comprises an accumulation area partially pre-filled with propellant and an area filled with extinguishing agent, which are separated by a membrane.
  • the tank body is fixed in the ceiling, on a side wall or in an adjoining room / cabinet and connected to a sprinkler fixed to the ceiling via a connecting hose.
  • the external propellant tank can be a gas container which can be pierced by an electrically or pneumatically operated needle.
  • the invention relates to a fire extinguishing device with holding means for hanging attachment.
  • the fire extinguishing device comprises a fire alarm which is set up to measure a fire indicator, to compare the fire indicator with a predetermined threshold value and to generate a detection signal when the threshold value is exceeded.
  • the fire extinguishing device further comprises an integrated extinguishing agent tank for receiving an extinguishing agent, an extinguishing agent nozzle which is set up to deliver the extinguishing agent onto an extinguishing surface located below the fire extinguishing device, and a pressure generating means for generating an overpressure in the extinguishing agent tank.
  • the fire extinguishing device comprises a trigger mechanism preloaded with an elastic element, the trigger mechanism being set up to trigger the pressure generating means as a function of the detection signal, so that a pressure in the extinguishing agent tank exceeds a predetermined pressure value and the extinguishing agent nozzle sprays the extinguishing agent onto the extinguishing surface.
  • This device represents a structurally robust and long-lasting fire-fighting unit, which allows a reliable mode of operation with simple technical means and can be used in private households without significant conversion measures.
  • the retaining means for hanging the fire extinguishing device can include eyelets, clips, recesses and / or threads in order to fasten the fire extinguishing device with fasteners such as screws, hooks and / or nails to the interior walls of the building, in particular a ceiling of a private household.
  • the fire extinguishing device can be configured to be connected to an associated ceiling mount with a connecting element.
  • the fire alarm of the fire extinguishing device can comprise any combination of heat alarms, smoke alarms, gas alarms and / or optoelectronic measuring devices in order to detect a local smoldering fire.
  • the fire indicator can accordingly detect a local concentration of smoke particles, a local presence and / or concentration of an (ionized) gas, a temperature threshold and / or a signal intensity of an optoelectronic measuring device.
  • An associated threshold value can be selected in order to reliably detect a source of fire and at the same time to keep the probability of false alarms comparatively low.
  • the fire alarm comprises a smoke alarm and / or a fire gas alarm and / or a heat alarm.
  • an integrated extinguishing agent tank is provided in the fire extinguishing device, which holds a reservoir of an extinguishing agent ready.
  • the term “integrated” can be understood in this context in such a way that the extinguishing agent tank is arranged in a housing of the fire extinguishing device and / or forms part of the housing.
  • the integrated extinguishing agent tank therefore allows the fire extinguishing system to be assembled and ready for operation as a unit without significant modifications.
  • the housing of the fire extinguishing device preferably comprises a cylindrical housing delimitation, the extinguishing agent tank being arranged in particular in or forming the cylindrical housing delimitation, and the cylindrical housing delimitation preferably being aligned along the holding means.
  • cylindrical can be understood in particular as the shape of a cylinder with a polyhedral, preferably approximately circular, base, wherein the longitudinal axis of the cylinder can be arranged in particular normal to the holding means.
  • the base area of the cylindrical housing delimitation points downwards in some embodiments when the fire extinguishing device is attached to a ceiling.
  • the cylindrical housing delimitation can, however, comprise rounded or cut-off edges, notches, passage openings, protuberances and the like without deviating from the cylindrical shape.
  • the extinguishing agent comprises liquid extinguishing agent components, preferably a foaming extinguishing agent.
  • the extinguishing agent can be a biodegradable extinguishing agent, such as a foam-forming biodegradable extinguishing agent, or a water-film-forming extinguishing agent based on salts and / or surfactants, so that inadvertent damage to household items when the fire extinguishing device is triggered can be minimized.
  • a biodegradable extinguishing agent such as a foam-forming biodegradable extinguishing agent, or a water-film-forming extinguishing agent based on salts and / or surfactants, so that inadvertent damage to household items when the fire extinguishing device is triggered can be minimized.
  • the fire extinguishing device further comprises a fluid connection between the extinguishing agent tank and the extinguishing agent nozzle and a pressure valve in the fluid connection, wherein the pressure valve is set up to prevent an extinguishing agent flow through the fluid connection below a predetermined pressure value, the pressure valve in particular a mechanical pressure valve, preferably a A predetermined breaking point and / or a ball valve includes.
  • a pressure threshold or a pressure difference threshold for opening the pressure valve can be selected depending on the installation height of the extinguishing agent tank and can, for example, be at least 0.02 bar and preferably at least 0.1 bar or at least 1 bar, for example 0.5 bar or 1.5 bar , amount.
  • a ball valve in the pressure valve can be designed in such a way that it is triggered in the event of a pressure difference above 0.1 bar.
  • the pressure valve comprises a predetermined breaking point, the predetermined breaking point being set up in such a way that it yields above a pressure value dictated by the design and allows an extinguishing agent to flow through, the pressure value in particular above 0.5 bar and preferably above 1 bar, e.g. above 1 , 5 bar or 2.5 bar, so that unintentional yielding of the predetermined breaking point, e.g. due to vibrations during transport or during installation, can be prevented and reliable passage of extinguishing agent is guaranteed after the fire extinguishing device has been triggered.
  • the fire extinguishing device further comprises a filter device which is arranged in front of the extinguishing agent nozzle and which is set up to hold back solid elements in the extinguishing agent from the extinguishing agent nozzle so that an extinguishing agent flow through the extinguishing agent nozzle is not impeded.
  • the filter device can comprise a sieve in order to hold back particles in the extinguishing agent.
  • particles such as components of the predetermined breaking point, the extinguishing agent nozzle or the fluid connection from the extinguishing agent tank to the extinguishing agent nozzle can at least partially block, so that the distribution of the extinguishing agent can become uneven.
  • the filter device is therefore arranged between the extinguishing agent nozzle and the extinguishing agent tank and preferably between the extinguishing agent nozzle and the pressure valve, in order to prevent the extinguishing agent nozzle from being blocked by particles in the extinguishing agent.
  • the extinguishing agent can be scattered onto the extinguishing surface via the extinguishing agent nozzle.
  • the extinguishing surface can be influenced by the shape and / or orientation of the opening of the extinguishing agent nozzle and preferably corresponds to an elliptical extinguishing surface.
  • the extinguishing surface corresponds to the projection surface of a circular extinguishing cone, so that an essentially uniform distribution of the extinguishing agent over the extinguishing surface is achieved.
  • a full cone nozzle is preferably used here so that the projection surface can be completely covered.
  • a hollow cone nozzle can also be used which, due to the fluid flow-dependent speed distribution, can equally allow an essentially uniform distribution of the extinguishing agent.
  • a rotating or freely rotating or static cleaning nozzle can also be used.
  • the extinguishing agent tank has a volume of at least 0.5 l, in particular at least 1 l, and / or a volume of at most 5 l or at most 3 l, in particular of at most 2 l, preferably between 0.5 l and 3 l, and preferably between 1l and 2l.
  • a volume of the extinguishing agent tank of at least 0.5 l, preferably at least 1 l, can allow incipient fires to be extinguished reliably.
  • a volume of the extinguishing agent tank can at the same time be less than 5 l or less than 3 l, preferably less than 2 l, in order to create a compact and versatile device which can be fastened indoors with commercially available means and used without significantly impairing the volume of the room. Due to the correspondingly lower minimum height of the device for receiving the extinguishing agent tank, a sufficiently large extinguishing surface can be ensured.
  • the extinguishing agent nozzle is for guiding a flow of extinguishing agent with a flow rate of at least 1.5 l / min and / or at most 10 l / min, in particular at most 5 l / min or at most 3.5 l / min, preferably between 1.5 l / min. min to 5l / min, and preferably between 1.5l / min and 3.5l / min.
  • the extinguishing agent nozzle is set up to generate a spray cone which has an opening angle of at least 70 ° or at least 80 °, preferably at least 90 °, and preferably at least 100 °, such as 120 °.
  • a uniform layer of extinguishing agent can be formed on the extinguishing surface defined by the spray cone by using the extinguishing agent nozzle.
  • An opening angle of the spray cone of at least 100 ° e.g. approx. 120 ° with a standard ceiling height of approx. 2.5 m can in this context allow a reliable covering of common interiors and at the same time satisfactory atomization properties of the extinguishing agent.
  • the fire extinguishing system can be triggered by the fire detector via the trigger mechanism when a fire is detected.
  • the release mechanism is preloaded with an elastic element, for example a mechanical spring, so that the mechanical energy stored in the elastic element can be used to reliably release the pressure generating means.
  • the elastic element can be pre-tensioned at the factory so that the mechanical energy can be available independently of the user and installation.
  • the fire extinguishing device comprises an electrical actuator which is set up to release the trigger mechanism as a function of the detection signal.
  • the electrical actuator for example an electric motor, can, for example, move a locking pin of the triggering mechanism or pivot a pawl of the triggering mechanism so that the energy stored in the triggering mechanism can be released for triggering the pressure generating means.
  • This allows a stored electrical energy in the fire extinguishing device to be selected to be low, so that the fire extinguishing device is reliably available over a longer period of time without the replacement of electrical energy stores.
  • an actuator of the electrical actuator is coupled to a blocking element for blocking the release mechanism, with operation of the electrical actuator releasing the blocking element, the actuator and the blocking element are coupled in particular via a force-displacement converter, preferably a pivotable lever element.
  • the electrical actuator used can trigger the release mechanism with a low torque.
  • the electrical actuator and an associated energy store can be dimensioned low, so that the longevity can be increased and / or the physical dimensions of the device can be reduced.
  • the pressure generating means can comprise a mechanical pressure generating means, a chemical pressure generating means, an electrical pressure generating means or a combination thereof, and can comprise pressure containers, spring elements, hydraulic elements, displaceably mounted pistons, pyrotechnic elements, electrical pressure generators or the like, which are triggered via the trigger mechanism.
  • the pressure generating means comprises a pressure vessel, the pressure vessel in particular comprising a gas cartridge.
  • a pressure vessel By using a pressure vessel, potentially dangerous or unreliable pressure generating means such as pyrotechnic charges, chemical reactions or electrical pressure generators can be avoided.
  • a gas cartridge By using a pressure vessel, potentially dangerous or unreliable pressure generating means such as pyrotechnic charges, chemical reactions or electrical pressure generators can be avoided.
  • the use of a gas cartridge can allow the compact and reliable storage of an amount of gas used to generate pressure.
  • the trigger mechanism comprises a piercing device pretensioned with the elastic element for piercing the pressure vessel.
  • the use of a piercing device to pierce the pressure vessel makes it possible to design the pressure vessel without valves and thus to reduce the probability of mechanical failure.
  • the piercing device can pierce a pressure vessel wall of the pressure vessel so that the pressure medium stored in the pressure vessel can escape through the opened pressure vessel wall.
  • the pressure vessel can comprise a carbon dioxide cartridge, and a puncture needle can pierce a membrane or predetermined breaking point of the cartridge with the aid of the energy stored in the elastic element in order to provide the contents of the carbon dioxide cartridge for generating an overpressure in the extinguishing agent tank.
  • the membrane can be a metal membrane provided for piercing, which is arranged after the installation of the pressure vessel in the fire extinguishing device opposite the piercing device.
  • the triggering mechanism comprises a second elastic element which has an effective direction opposite to the elastic element, the second elastic element being set up to space the piercing device from the pressure generating means.
  • the use of the second elastic element can prevent unintentional damage to the puncturing device or the pressure vessel by movement of the puncturing device during assembly of the device, during pretensioning of the aforementioned (first) elastic element or during transport of the fire extinguishing device. At the same time, rattling of the device during transport and corresponding wear effects can be reduced.
  • the piercing device comprises an inner channel in order to guide a fluid flow from the pressure vessel through the piercing device.
  • the inner channel can be formed, for example, by a cavity of a piercing needle of the piercing device in order to guide the fluid flow from the pressure vessel through the piercing device to the extinguishing agent tank.
  • the inner channel can be formed by a notch, such as a V-shaped notch, of a piercing needle.
  • the inner channel can be selected in such a way that it provides a sufficient fluid flow for the pressure medium in order to keep the pressure in the extinguishing medium tank above 1.5 bar during the discharge of the extinguishing medium.
  • the piercing device comprises a cannula or a hypotube in order to guide a pressure medium from the pressure vessel through the piercing device.
  • the fire extinguishing device further comprises a metering orifice between the pressure generating means and the extinguishing agent tank, so that after the pressure generating means has been triggered, the pressure in the extinguishing agent tank is essentially below 8 bar, preferably below 5 bar, and in particular for a predetermined period of preferably at least 20 Seconds above 1.5 bar.
  • the pressures generated by compact pressure generating means are regularly above 8 bar, so that the extinguishing agent can be subject to strong atomization and thus uneven distribution when it escapes through the extinguishing agent nozzle.
  • an approximately linear and preferably approximately constant pressure curve can be achieved in the extinguishing agent tank, so that a uniform distribution of the extinguishing agent can take place over the extinguishing surface.
  • the fire extinguishing device furthermore comprises a fire alarm transmitter which, as a function of the detection signal, generates an alarm signal, in particular an acoustic alarm signal and / or a visual alarm signal.
  • the fire alarm device allows the compact provision of an integrated protective device, whereby the fire extinguishing device can simultaneously fulfill fire fighting and warning functions.
  • the fire extinguishing device is furthermore coupled to a control system via an electronic interface, so that the alarm signal is also sent electronically.
  • a fire emergency call can be sent via the alarm signal or a user can be informed about the detection of the fire at an electronic terminal.
  • a wireless radio transmitter and / or radio receiver can be provided in the fire extinguishing device, which can send an electronic alarm or detection signal from the fire detector, for example to a user's mobile phone.
  • the trigger mechanism is set up to trigger the pressure generating means after a predetermined time delay has elapsed after the alarm signal.
  • the predetermined time delay can allow a user to leave the extinguishing surface before the device is triggered or, in the event of a false alarm, to switch off the device before the pressure generating means is triggered.
  • the predetermined time delay can be, for example, at least 20 seconds, e.g. 30 seconds or 60 seconds.
  • the fire extinguishing device further comprises a disconnection device, confirmation of the disconnection device before the predetermined time delay has elapsed prevents the pressure generating means from being triggered.
  • the switch-off device can comprise a radio receiver for receiving an electronic switch-off signal and / or can be attached as an electrical and / or mechanical switch-off button on or in the vicinity of the device.
  • the fire extinguishing device further comprises a lighting means, in particular an electrical lighting device, which is set up to illuminate a region of the extinguishing surface.
  • the fire extinguishing device can include an emergency light, the lighting means being triggered when the fire alarm device detects a fire, so that residents can recognize the position of the fire extinguishing device or locate an escape route even with limited visibility.
  • the fire extinguishing device comprises an electrical light source and in particular provides a ceiling lamp with an integrated protective device.
  • Fig. 1 shows a diagram of an exemplary fire extinguishing device 10.
  • the fire extinguishing device 10 comprises a housing 12, a fire alarm 14, a control unit 16, a trigger mechanism 18, a pressure generating means 20, an extinguishing agent tank 22 and an extinguishing agent nozzle 24.
  • the fire alarm 14 is arranged at least partially in the housing 12 and is set up to recognize a fire and in particular a smoldering fire on the basis of a measured fire indicator and in this case to generate a detection signal 26.
  • the detection signal 26 can be received by a control unit 16 which, in response to the detection signal 26, initiates appropriate measures, such as triggering a fire alarm (not shown) and sends a trigger signal 28 to the triggering mechanism 18 at the latest after a predetermined time delay has elapsed.
  • the trigger mechanism 18 is set up to trigger the pressure generating means 20 as a function of the detection signal 26.
  • the triggering mechanism 18 comprises an elastic element in which a (mechanical) triggering energy for triggering the pressure generating means 20 is stored via an operative connection 30.
  • the pressure generating means 20 generates a pressure effect 32 after it has been triggered, so that a pressure in the extinguishing agent tank 22 exceeds a predetermined pressure value and the extinguishing agent nozzle 24 sprays an extinguishing agent 34 onto an extinguishing surface below the extinguishing agent nozzle 24.
  • the extinguishing agent tank 22 can be coupled to the extinguishing agent nozzle 24 via the fluid connection 36, so that a fluid flow 38 driven by the pressure 32 can be atomized through the extinguishing agent nozzle 24 and / or the atomized extinguishing agent 34 can be distributed over the extinguishing surface.
  • Figure 2A illustrates an extinguishing cone 40 of a fire extinguishing device 10 with an extinguishing agent nozzle 24 according to an exemplary side view.
  • Figure 2B shows an exemplary isometric view of a circular extinguishing cone 40 of a fire extinguishing device 10 with an extinguishing agent nozzle 24.
  • the extinguishing cone 40 can be generated as a result of the detection signal 26 from the fire alarm 14 by an increase in pressure in the extinguishing agent tank 22 of the fire extinguishing device 10 and the extinguishing agent 34 escaping as a result.
  • a liquid extinguishing agent 34 can be atomized through the outlet from the extinguishing agent nozzle 24, with extinguishing agent droplets having a speed distribution corresponding to the shape of the extinguishing agent nozzle 24 and the flow rate, which preferably has a uniform droplet density and / or droplet size over an extinguishing angle 42 of the extinguishing cone 40 and / or generated via a predetermined extinguishing surface 44.
  • a uniform extinguishing effect can be generated via an essentially uniform droplet density, so that the limited amount of extinguishing agent stored in the integrated extinguishing agent tank 22 can be optimally used.
  • the extinguishing surface 44 is approximately circular, so that the extinguishing effect of the fire extinguishing device 10 can be essentially independent of the installation.
  • the extinguishing cone can be a cone 42 starting from the extinguishing agent nozzle 24 and having a circular base area 44.
  • the extinguishing angle 42 can be selected to be approximately 120 °, for example, without impairing sufficient atomization of the extinguishing agent.
  • the fire extinguishing device 10 can cover a circular extinguishing surface 44 with a diameter d of approx. 7 m , so that the interiors of private households of normal dimensions can be covered with a single fire extinguishing device 10.
  • Fig. 3 illustrates an exemplary fire extinguishing device 10 in an exploded view.
  • the fire extinguishing device 10 comprises a housing 12 in which an extinguishing agent tank 22 and a pressure generating means 20 with an associated triggering mechanism 18 are arranged, the extinguishing agent tank 22 being coupled to an extinguishing agent nozzle 24.
  • the illustrated housing 12 comprises a housing cover 46 for hanging attachment to a ceiling and a cylindrical housing body 48, which has housing passage openings 50, which are used for the detection of fire indicators with a fire alarm 14 (not in Fig. 3 shown) can be formed continuously in the housing 12.
  • the extinguishing agent tank 22, which as in FIG Fig. 3 shown can be composed of a lower trough 52 and an upper cover element 54, wherein a sealing ring 56 can prevent an unintentional escape of extinguishing agent 34 from the extinguishing agent tank 22.
  • a recess 58 can be provided in a bottom wall of the trough 52 in order to establish a fluid connection 36 (in Fig. 3 not shown) from the trough 52 to an extinguishing agent nozzle 24 provided on the underside of the fire extinguishing device 10.
  • the extinguishing agent nozzle 24 can be attached to a housing opening 60 in the housing body 48, which can be arranged coaxially with the recess 58 in the trough 52 for space-saving insertion of the nozzle 24 and / or the fluid connection 36 between the extinguishing agent tank 22 and the nozzle 24.
  • the upper cover element 54 can comprise a recess 62 for receiving a release mechanism 18 and / or a pressure generating means 20, wherein the dimensions of the recess 62 can essentially correspond to the dimensions of the release mechanism 18 or of the pressure generating means 20.
  • the pressure generating means 20 can comprise a pressure container 64 which is coupled to the interior of the extinguishing agent tank 22 via a fluid connection, so that an increase in the pressure in the extinguishing agent tank 22 can be brought about after the pressure generating means 20 has been triggered.
  • the illustrated trigger mechanism 18 comprises an electronically controlled trigger 66, such as an electrical actuator 66, e.g. B. an electric motor to initiate the triggering mechanism 18 depending on a detection signal 26 of a fire alarm 14, so that a pressure vessel 64, such as a gas cartridge 64, is opened with the aid of a pressure vessel opening device 68. Expanding gases from the gas cartridge 64 can then increase the pressure in the extinguishing agent tank 22 so that the extinguishing agent 34 can be sprayed via the extinguishing agent nozzle 24 onto an extinguishing surface 44 located below the fire extinguishing device 10.
  • an electronically controlled trigger 66 such as an electrical actuator 66, e.g. B. an electric motor to initiate the triggering mechanism 18 depending on a detection signal 26 of a fire alarm 14, so that a pressure vessel 64, such as a gas cartridge 64, is opened with the aid of a pressure vessel opening device 68. Expanding gases from the gas cartridge 64 can then increase the pressure in the extinguishing agent tank 22 so that the
  • a passage opening (in Fig. 3 not shown) can be provided in the upper cover element 54 or the tub 52, which can comprise a pressure connection valve, a check valve, a metering orifice and / or a predetermined breaking point for connecting the pressure generating means 20 to the extinguishing agent tank 22.
  • An overpressure generated by the pressure generating means 20 can be controlled via a metering orifice between the pressure generating means 20 and the extinguishing agent tank 22, so that after the pressure generating means 20 has been triggered, the pressure in the extinguishing agent tank 22 remains below a predetermined value, such as 8 bar or 5 bar and remains above 1.5 bar for a predetermined period of preferably at least 20 seconds, so that controlled atomization of the extinguishing agent can be ensured in a predetermined extinguishing period.
  • a predetermined value such as 8 bar or 5 bar
  • a pressure profile in the extinguishing agent tank can be constant or linear in the predetermined extinguishing period, so that a uniform delivery of the atomized extinguishing agent is ensured.
  • the volume of the extinguishing agent tank 22 can be at least 0.5 l and preferably at least 1 l for a biodegradable extinguishing agent 34, such as a foaming extinguishing agent 34, so that sufficient coverage of a room floor can be achieved at an extinguishing angle 42 of approx. 120 °.
  • a biodegradable extinguishing agent 34 such as a foaming extinguishing agent 34
  • this extinguishing period in which the intended amount of extinguishing agent 34 is distributed on the extinguishing surface, is less than one minute.
  • Figures 4A and 4B each show views of exemplary fire extinguishing devices 10, for example the fire extinguishing device 10 Fig. 3 .
  • Figure 4A shows a side view of a fire extinguishing device 10, wherein a housing body 48 and an extinguishing agent nozzle 24 protruding from the lower end of the housing body 48 can be seen.
  • the housing body 48 is designed as a cylindrical element which has vertically extending housing passage openings 50 which are distributed around its circumference and which connect an interior of the housing body 48 to an outside area.
  • the fire extinguishing device 10 is provided on its upper side for hanging fastening on a fastening surface, so that the jacket of the cylindrical housing 12 or the cylinder axis is perpendicular to the fastening surface.
  • the extinguishing agent nozzle 24 of the fire extinguishing device 10 is aligned along this cylinder axis and is set up to spray an extinguishing surface 44 located below the fire extinguishing device 10.
  • the extinguishing agent nozzle is in Figure 4A protrudes downward from the housing body 48, the extinguishing agent nozzle 24 in embodiments can likewise be set back into the housing body 48 or can be flush with the underside of the housing body 48.
  • FIG 4B shows a plan view of a fire extinguishing device 10, a housing cover 46 on the upper side of the fire extinguishing device 10 not being shown for better illustration.
  • An extinguishing agent tank 22 is inserted into the cylindrical housing body 48, FIG Figure 4B only the cover element 54 with a recess 62 is shown.
  • the outer boundary of the extinguishing agent tank 22 essentially fills the interior of the housing body 48 except for an opening 70 and the area defined by the recess 62.
  • a trigger mechanism 18 and a pressure generating means 20 are inserted in the recess 62, the pressure generating means 20 comprising a pressure container 64 with compressed gas in order to increase the pressure in the extinguishing agent tank 22.
  • the trigger mechanism 18 comprises an electrical actuator 66 which, as a function of an electronic signal 28, activates a pressure vessel opening device 68, which in turn triggers the pressure generating means 20 via a spring-loaded opening mechanism.
  • the recess 62 can be sealed on its upper side, and / or the pressure generating means 20 can be connected to the extinguishing agent tank 22 via a sealed fluid connection and / or can be arranged at least partially in the extinguishing agent tank 22, so that a pressure effect generated by the pressure generating means 20 primarily occurs an extinguishing agent 34 acts in the extinguishing agent tank 22.
  • the electronic signal 28 can be generated by a fire alarm 14 or an associated control unit 16 of an electronic assembly, which can advantageously be arranged in the recess 70 of the housing body 48.
  • the omission 70 can as in Figure 4B be arranged in the housing body 48 to the side of the extinguishing agent tank 22 and at least one of the housing passage openings 50 are opposite, so that a detection of fire gas or smoke gas in the interior of the housing body 48 is promoted.
  • the fire alarm 14 can, however, also be arranged in a recess 62 on an upper side of the extinguishing agent tank 22, or the housing body can have one or more housing passage openings 50 on its underside in order to prevent a concentration of fire gas or smoke gas in the interior of the housing body 48 through the fire alarm 14 as Detect fire indicator.
  • the fire alarm 14 can generate a detection signal 26, which can be used as a trigger signal 28 directly to trigger the trigger mechanism 18 or can be processed by a control unit 16 of the fire extinguishing device 10, which in turn, for example Trigger delay can send a trigger signal 28 to the trigger mechanism 18.
  • the fire extinguishing device 10 can then be triggered in a controlled manner.
  • a lighting means can also be provided which is triggered in particular as a result of the electronic signal 28 and which illuminates at least the fire extinguishing device 10 and / or the extinguishing surface 44.
  • a lighting effect of the lighting means can emerge from the housing 48 through the housing passage openings 50, for example.
  • the fire extinguishing device 10 can also provide an emergency light as a compact protective device and / or can also be used as a ceiling lamp.
  • Fig. 5 shows a schematic view of a pressure generating means 20 and a triggering mechanism 18, coupled to the pressure generating means, for a fire extinguishing device 10 according to an example.
  • the trigger mechanism 18 comprises a piercing device 72 which is pretensioned by an elastic element and which is set up to open a pressure container 64 which is coupled to the trigger mechanism 18 and which is shown as a gas cartridge 64.
  • the gas cartridge 64 can be coupled to the piercing device 72 via a connecting and holding mechanism 74, such as a screw thread, so that a mechanically stable and preferably gas-tight connection to the piercing device 72 is provided.
  • the gas cartridge 64 has a membrane 76 which is exposed in the direction of the piercing device 72 and which can be pierced by the piercing device 72 in order to release an enclosed pressure medium and to trigger a pressure effect 30 on the extinguishing medium 34 in the extinguishing medium tank 22.
  • the piercing device 72 comprises a piercing tip 78 which is attached to a piercing body 80 which is movably mounted in the piercing device 72 relative to the gas cartridge.
  • the piercing body 80 lies in a guide 82 of the piercing device 72 and is pretensioned in the direction of the membrane 76 of the gas cartridge 64 by a helical spring 84 as an exemplary elastic element.
  • a piercing of the membrane 76 by the piercing device 72 is prevented in the initial state by a locking element 86 (shown as a projection of a pivotable pawl) which strikes a stop surface 88 of the piercing body 80 and blocks a relative movement of the piercing tip 78 in the direction of the membrane 76.
  • the blocking element 86 can be released via an electrical actuator 66, an actuator 90 of the electrical actuator 66 being coupled to the blocking element 86 via a lever element 92.
  • the electrical actuator 66 can exert a pulling effect on the actuator 90, so that the lever element 92 rotates about a pivot bearing 94 and the stop between the blocking element 86 and the stop surface 88 of the piercing body 80 is released.
  • the piercing body 80 can then execute a movement driven by the helical spring 84 in the guide 82 in the direction of the membrane 76 of the gas cartridge 64, so that the membrane 76 is pierced by the piercing tip 78 and a pressure medium stored in the gas cartridge 64 is released.
  • the piercing device 72 can have a second spring 96 which has an effective direction opposite to the helical spring 84 and which can also be arranged in the guide 82. After relaxing the coil spring 84, the The second spring 96 therefore drives the piercing tip 78 out of the gas cartridge 64, so that the pressure medium can be guaranteed to escape from the gas cartridge 64 with sufficient flow.
  • the piercing tip 78 can have an inner channel 98 in order to ensure that the pressure medium escapes despite the piercing tip 78 getting stuck in the gas cartridge 64.
  • piercing tip 78 can have a V, L or O-shaped cross section, for example, so that the pressure medium can exit from gas cartridge 64 through a cavity in piercing tip 78.
  • the pivot bearing 96 is preferably at a shorter distance from the locking element 86 than from a coupling 100 with the actuator 90 of the electrical actuator 66, so that the lever element 92 as a force / displacement converter reduces a force torque of the electrical actuator 66 required to trigger the trigger mechanism 18.
  • An electrical energy store required for the operation of the fire extinguishing device 10 can therefore be minimized. In this way, a robust and reliable device 10 can be provided.
  • the helical spring 84 can be pre-tensioned on the operational side via the pre-tensioning element 102 in order to ensure a reliable operation of the release mechanism 18.
  • the preloading element 102 can have a thread opposite the helical spring 84 in order to preload the helical spring against the blocking element 86 resting against the stop surface 88 of the piercing body 80.
  • the lever element 92 can additionally have a securing element receptacle 104, which is set up to receive a securing element, such as a securing pin, so that the blocking element 86 is prevented from evading, in particular perpendicular to a guiding direction of the guide 82.
  • the securing pin can be inserted into the securing element receptacle 104 at the factory in order to hold the piercing body 80 securely during transport and / or during assembly. In this way, unintentional triggering of the fire extinguishing device 10 during transport or assembly of the fire extinguishing device 10 can be prevented.
  • the securing pin can be removed from the securing element receptacle 104 in order to put the attached fire extinguishing device 10 in a state ready for use. As a result, a robust and reliable fire extinguishing device 10 can be provided.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
EP20195534.1A 2019-10-08 2020-09-10 Dispositif d'extinction automatique d'incendie Withdrawn EP3804819A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019126960.1A DE102019126960B3 (de) 2019-10-08 2019-10-08 Automatische Feuerlöscheinrichtung

Publications (1)

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EP3804819A1 true EP3804819A1 (fr) 2021-04-14

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EP20195534.1A Withdrawn EP3804819A1 (fr) 2019-10-08 2020-09-10 Dispositif d'extinction automatique d'incendie

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EP (1) EP3804819A1 (fr)
DE (1) DE102019126960B3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022126424B4 (de) 2022-10-11 2024-10-10 Henning Elsäßer Feuerlöscheinrichtung
CN117449897B (zh) * 2023-11-20 2024-08-13 山西潞安环保能源开发股份有限公司 一种用于矿井的灭火装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6029751A (en) * 1997-02-07 2000-02-29 Ford; Wallace Wayne Automatic fire suppression apparatus and method
WO2004080541A1 (fr) * 2003-03-11 2004-09-23 Kazuo Aoki Extincteur d'incendie automatique
WO2018148354A1 (fr) 2017-02-09 2018-08-16 Fike Corporation Système d'extinction d'incendies silencieux
GB2561831A (en) 2017-04-21 2018-10-31 Firescape Global Ltd Fire safety device and fire safety system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6029751A (en) * 1997-02-07 2000-02-29 Ford; Wallace Wayne Automatic fire suppression apparatus and method
WO2004080541A1 (fr) * 2003-03-11 2004-09-23 Kazuo Aoki Extincteur d'incendie automatique
WO2018148354A1 (fr) 2017-02-09 2018-08-16 Fike Corporation Système d'extinction d'incendies silencieux
GB2561831A (en) 2017-04-21 2018-10-31 Firescape Global Ltd Fire safety device and fire safety system

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