EP3878524A1 - Dispositif de production d'un mélange de gaz-liquide destiné à des fins de lutte contre l'incendie - Google Patents

Dispositif de production d'un mélange de gaz-liquide destiné à des fins de lutte contre l'incendie Download PDF

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Publication number
EP3878524A1
EP3878524A1 EP20162046.5A EP20162046A EP3878524A1 EP 3878524 A1 EP3878524 A1 EP 3878524A1 EP 20162046 A EP20162046 A EP 20162046A EP 3878524 A1 EP3878524 A1 EP 3878524A1
Authority
EP
European Patent Office
Prior art keywords
mixing
cross
sectional area
container
passage
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.)
Pending
Application number
EP20162046.5A
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German (de)
English (en)
Inventor
Frank Engelhardt
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.)
Advanced Firefighting Technology GmbH
Original Assignee
Advanced Firefighting Technology 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 Advanced Firefighting Technology GmbH filed Critical Advanced Firefighting Technology GmbH
Priority to EP20162046.5A priority Critical patent/EP3878524A1/fr
Priority to CN202180028587.5A priority patent/CN115427115B/zh
Priority to PCT/EP2021/056017 priority patent/WO2021180773A1/fr
Publication of EP3878524A1 publication Critical patent/EP3878524A1/fr
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
    • A62C13/66—Portable extinguishers which are permanently pressurised or pressurised immediately before use with extinguishing material and pressure gas being stored in separate containers
    • 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

Definitions

  • the present disclosure generally relates to the field of firefighting.
  • a device for producing a gas-liquid mixture for firefighting purposes is presented, wherein the gas-liquid mixture is a mixture of a liquid medium and a pressurized gaseous medium.
  • CAFSs Compressed Air Foam Systems
  • CAFSs Conventional (non-compressed) air foam systems use ambient air to produce a firefighting foam. To this end, the ambient air is sucked into a jet pump of a firefighting device and supplied to a mixture of water and a foaming agent.
  • CAFSs do not use ambient air to produce the firefighting foam. Instead, pressurized air is introduced into the liquid medium (i.e., the water/foaming agent mixture). Using pressurized air has the advantage that energy losses due to suction of ambient air into a jet pump and the admixing of the ambient air into the liquid medium are avoided. As a result, CAFSs generally have longer jet ranges than systems that use ambient air to produce the firefighting foam.
  • CAFSs can be utilized in different configurations. They can be installed in a stationary manner, for example in a building, or permanently on a firefighting vehicle, or they can be used as portable firefighting devices. In the case of stationary and permanently installed CAFSs, the systems can become very complex. It is often possible for such systems to adjust the working parameters such as the mixing ratio of the pressurized air and the liquid medium as well as the air pressure during actuation.
  • Portable CAFSs typically have fixed working parameters, which enables a quick and untrained use.
  • CAFSs with mixing chambers have the disadvantage of a complex design and high material and maintenance costs.
  • a device configured to produce a gas-liquid mixture for firefighting purposes.
  • the device comprises a mixing container configured to receive a liquid medium and a pressurized gaseous medium, wherein the mixing container has an outlet for the gas-liquid mixture and a mixing pipe arranged within the mixing container and configured to guide the gas-liquid mixture towards the container outlet.
  • the mixing pipe comprises a wall having a mixing passage configured to introduce the gaseous medium from an outside of the mixing pipe into the liquid medium, when same is guided within the mixing pipe towards the container outlet, wherein the mixing passage has a first cross-sectional area and a portion of the mixing pipe downstream of the mixing passage, or of a discharge line downstream of the mixing pipe, has a second cross-sectional area.
  • the ratio between the first cross-sectional area and the second cross-sectional area is between 1:4 and 1:25.
  • the mixing passage is defined by one or more mixing orifices.
  • the mixing orifices may be arranged linearly one behind the other along a longitudinal axis of the container.
  • the first cross-sectional area may be defined by the total cross-sectional area of the one or more mixing orifices.
  • the mixing orifices can have different shapes (circular, rectangular, etc.). For example, the mixing orifices can be bores drilled into the mixing pipe.
  • the first cross-sectional area of the mixing passage may be at least one of larger than 3 mm 2 and smaller than 13 mm 2 .
  • the first cross-sectional area may in particular be at least one of larger than 4.5 mm 2 and smaller than 9.1 mm 2 .
  • the first cross-sectional area of the passage can be at least one of larger than 5.1 mm 2 and smaller than 7.1 mm 2 .
  • the mixing container can comprise a container bottom opposite to the container outlet and define a longitudinal extension from the container bottom to the container outlet.
  • a first distance between the mixing passage and the container bottom along the longitudinal extension can be at least 5 times, in particular at least 8 times (e.g., more than 10 times) greater than a second distance between the mixing passage and the container outlet along the longitudinal extension.
  • the first distance can be up to 30 times, in particular up to 20 times (e.g., up to 15 times) greater than the second distance.
  • the second cross-sectional area may be a minimum cross-sectional area of a fluidic passage of the mixture of the liquid medium and the pressurized gaseous medium from the mixing passage to the portion of the mixing pipe downstream of the mixing passage or of the discharge line downstream of the mixing pipe.
  • the second cross-sectional area may be the cross-sectional area directly downstream of the end of the mixing passage (e.g., adjacent to the point of the mixing orifices that is nearest to the container outlet). In this way, the mixture of the pressurized gaseous medium and the liquid medium will not be restricted in a section downstream of the mixing passage and a constant and steady flow of the mixture can be established.
  • the second cross-sectional area is at least one of larger than 28 mm 2 (e.g., larger than 40 mm 2 ) and smaller than 133 mm 2 (e.g., smaller than 60 mm 2 ).
  • the mixing pipe may have a diameter larger than 3 mm (e.g., larger than 6 mm) and smaller than 13 mm (e.g., smaller than 10 mm)
  • the mixing pipe may have a third cross-sectional area in a region of the mixing passage.
  • the third cross-sectional area is defined by the cross-sectional area of the mixing pipe at a point of the mixing pipe where the pressurized gaseous medium is first introduced into the liquid medium (e.g., at the beginning of the first orifice that the liquid medium passes, when flowing inside the mixing pipe towards the container outlet).
  • a ratio between the first cross-sectional area and the third cross-sectional area may be greater than or equal to the ratio between the first cross-sectional area and the second cross-sectional area. In this way, the flow of the liquid medium towards the outlet of the mixing container will not be restricted at the mixing passage and the mixing ratio of the two mediums can be held constant during actuation of the device.
  • the mixing pipe can have a straight extension from a first end located in a vicinity of the container outlet to a second end located in a vicinity of the container bottom opposite to the container outlet.
  • the second end can have different shapes. For example, it can be curved or pointed so as to ensure that the liquid medium can flow into the mixing pipe in an unhindered manner.
  • the mixing container may have a volume between 3 and 500 liters (e.g., between 8 and 30 liters).
  • the mixing container can be pressure-proof up to at least between 3 and 15 bar.
  • the device may further comprises a nozzle configured to discharge the gas-liquid mixture from the device.
  • the nozzle can be a common nozzle known in the field of firefighting and may enable controlled and untrained use of the device.
  • the device can further comprise a control valve configured to control discharging of the gas-liquid mixture.
  • the control valve can be located between the discharge line and the mixing pipe as to control the pressure on the discharge line.
  • the device may comprise a pressure tank configured to store the pressurized gaseous medium and a pressure line extending from the pressure tank to the mixing container.
  • the pressure tank can act as a source of the pressurized gaseous medium.
  • the pressure tank may (e.g., detachably) be connected to the container.
  • the pressure tank can be pressure-proof up to at least between 200 and 450 bar.
  • the device can comprise at least one restriction valve located between the pressure line and an outlet of the pressure tank and configured to controllably release the pressurized gaseous medium from the pressure tank into the mixing container.
  • the pressure inside the mixing container can be held constant during actuation of the device.
  • the pressure inside the mixing container can be adjusted to lie in the range between 7 bar and 10 bar (e.g., to approximately 8.5 bar) during actuation of the device.
  • the gas-liquid mixture may be a foam, in particular when the liquid medium stored in the mixing container is a mixture of water and a foaming agent.
  • the firefighting properties of the foam produced by mixing the pressurized gaseous medium with the liquid medium may depend on the size of the bubbles of the produced foam, since different bubble sizes lead to different ranges of a fire extinguishing jet. Utilizing the device, the size of the bubbles of the produced foam can be controlled via the mixing ratio of the pressurized gaseous medium and the liquid medium as well as the pressure at which the mixture is discharged.
  • a firefighting method using the device having the geometric design parameters presented herein, such as the first cross-sectional area between 3 mm 2 and 13 mm 2 .
  • the method may use any of the working parameters presented herein, such as maintaining the pressure inside the mixing container to lie in the range between 7 bar and 10 bar
  • Fig. 1 illustrates a schematic representation of an embodiment of a device 50 configured to produce a gas-liquid mixture for firefighting purposes.
  • the device 50 is suitable for use as a CAFS.
  • compressed air can be used as a pressurized gaseous medium that is introduced in a liquid medium to produce the gas-liquid mixture.
  • the liquid medium may be a mixture of water and a foaming agent, as commonly used for firefighting purposes.
  • the device 50 comprises a mixing container 100 configured to receive the liquid medium and the pressurized gaseous medium.
  • the mixing container 100 has an outlet 110 for the gas-liquid mixture that is located at a top end of the container 100.
  • the mixing container 100 further comprises a container bottom 112 opposite to the container outlet 110. A longitudinal extension of the container 100 is defined from the container bottom 112 to the container outlet 110.
  • the mixing container 100 in the present embodiment has a volume of approximately 4 to 15 liters (e.g., approximately 6 liters). In different embodiments, the mixing container 100 can have different sizes and can thus have different volumes between, for example, 3 and 500 liters.
  • the mixing container 100 can is pressure-proof up to at least between 3 and 15 bar.
  • the device 50 can be a portable or a stationary device and can be combined with a cart or a firefighting vehicle (not shown in Fig. 1 ).
  • the device 50 illustrated in Fig. 1 further comprises a mixing pipe 120 shown to be arranged within the mixing container 100.
  • the mixing pipe 120 extends from a first end 122 located in a vicinity of the container outlet 110 straight to a second end 124 located in a vicinity of the container bottom 112 opposite to the container outlet 110 and is configured to guide the gas-liquid mixture towards the container outlet 110.
  • the second end 124 illustrated in Fig. 1 is pointed so that the liquid medium can flow into the mixing pipe 120 in an unhindered manner.
  • the mixing pipe 120 comprises a wall having a mixing passage 130.
  • the mixing passage 130 is configured to introduce the gaseous medium from outside the mixing pipe 120 into the liquid medium, when same is guided within the mixing pipe 120 towards the container outlet 110, so as to generate the gas-liquid mixture.
  • a first distance d1 between the mixing passage 130 and the container bottom 112 along the longitudinal extension is greater than a second distance d2 between the mixing passage 130 and the container outlet 100 along the longitudinal extension.
  • the first distance d1 can be at least 5 times, in particular at least 8 times greater than the second distance d2. Placing the mixing passage 130 near the container outlet 110 rather than the container bottom 112 ensures that the mixing passage 130 lies above the level of the liquid medium so that the pressurized gaseous medium can properly flow through the mixing passage 130.
  • the mixing passage 130 exemplarily illustrated in Fig. 1 is defined by a single mixing orifice 130. Additional mixing orifices are optional and indicated by dashed circles in Fig. 1 .
  • the mixing orifice 130 is arranged between two optional orifices located along the longitudinal extension of the mixing pipe 120. Hence, the three orifices are arranged linearly one behind the other. Additionally or as an alternative, two or more mixing orifices can be arranged in a circumferential direction of the mixing pipe 120, as shown in Fig. 1 .
  • the mixing passage 130 has a first cross-sectional area A 1 and a portion of the mixing pipe 120 downstream of the mixing passage 130 or of an optional discharge line 140 (see Fig.
  • the ratio between the first cross-sectional area A 1 and the second cross-sectional area A 2 is between 1:4 and 1:25 and in particular between 1:7 and 1:11.
  • the first cross-sectional area A 1 is defined by the cross-sectional area of the single mixing orifice 130.
  • the first cross-sectional area A 1 is defined by the total cross-sectional area of the multiple mixing orifices.
  • the mixing orifices can have different forms and shapes as long as the above-mentioned ratio between the first cross-sectional area A 1 and the second cross-sectional area A 2 is met.
  • the mixing orifices are bores provided in the mixing pipe.
  • Fig. 2 illustrates a schematic representation of a closure assembly comprising a mixing pipe 120 (similar to the one of Fig. 1 ), a control valve 150 and a closure for the mixing container outlet 110.
  • the mixing passage 130 of the mixing pipe 120 is defined by a single mixing orifice 130 with a diameter of approximately 2.7 mm.
  • the first cross-sectional area A 1 is approximately 5.7 mm 2 .
  • the portion of the discharge line 140 shown in Fig. 2 has a diameter of approximately 8 mm.
  • the second cross-sectional area A 2 is approximately 50.3 mm 2 . Consequently, the ratio between the first and the second cross-sectional area A 2 illustrated in Fig. 2 is around 1:9. A change in this ratio will lead to different results when discharging the mixture of the pressurized gaseous medium and the liquid medium, when other working parameters, like the pressure of the gaseous medium in the mixing container 100, are kept constant.
  • the first cross-sectional area A 1 of the mixing passage is between 3 mm 2 and 13 mm 2 .
  • the first cross-sectional area A 1 is between 4.5 mm 2 and 9.1 mm 2 .
  • the first cross-sectional area A 1 of the passage is between 5.1 mm 2 and 7.1 mm 2 .
  • the second cross-sectional area A 2 is between 28 mm 2 and 133 mm 2 so as to provide a ratio between the first and second cross-sectional areas A 1 :A 2 between 1:4 and 1:25.
  • the mixing pipe 120 has a third cross-sectional area A 3 in a region of the mixing passage 130.
  • a ratio between the first cross-sectional area A 1 and the third cross-sectional area A 3 is greater or equal to the ratio between the first cross-sectional area A 1 and the second cross-sectional area A 2 . Therefore, the flow of the liquid medium towards the outlet 110 of the mixing container 100 will not be restricted at the mixing passage 130.
  • the control valve 150 illustrated in Fig. 2 is configured to control discharging of the gas-liquid mixture.
  • the control valve 150 can be a common controllable check valve that allows a discharge of the mixture while being actuated and otherwise prevents a discharge of the mixture.
  • Fig. 3 illustrates a schematic representation of a fully operable firefighting device 300.
  • the firefighting device 300 combines the features discussed above with reference to Figs. 1 and 2 and further comprises a discharge line 140 and a nozzle 160.
  • the discharge line 140 is located downstream of the mixing pipe 120 and the control valve 150 is located between the discharge line 140 and the mixing pipe 120.
  • the control valve 150 When the control valve 150 is not actuated, the discharge line 140 is not under pressure. This enhances the lifetime of the discharge line 140 and general safety, since a damaged discharge line 140 does not automatically lead to a discharge of the mixture of the pressurized gaseous medium and the liquid medium.
  • the discharge line 140 can for example be a simple hose as commonly used with fire extinguishers. A complex and more expensive structure like a double hose is not needed.
  • the nozzle 160 is configured to work as a check valve, similar to the control valve 150, and to discharge the gas-liquid mixture from the firefighting device 300 on actuation of the nozzle 160.
  • the nozzle 160 can be a nozzle as commonly known in the field of firefighting. Due to the combination of the control valve 150 and the nozzle 160, an actuation of the control valve 150 leads to a flow of the mixture of the pressurized gaseous medium and the liquid medium into the discharge line 140. A following actuation of the nozzle 160 leads to a discharge of the mixture from the nozzle 160.
  • the second cross-sectional area A 2 is a minimum cross-sectional area of the fluidic passage from the mixing passage 130 to the portion of the mixing pipe 120 downstream of the mixing passage 130 and of the discharge line 140 downstream of the mixing pipe 120. Therefore, the mixture of the pressurized gaseous medium and the liquid medium will not be restricted in a section downstream of the mixing passage 130 and a constant and steady flow of the mixture can be established.
  • Fig. 4 illustrates a schematic representation of a second embodiment of the device 50 configured to produce a gas-liquid mixture for firefighting purposes.
  • the device 50 comprises a mixing container 100, a mixing pipe 120 and an inlet 170 for the gas.
  • the mixing container 100 and the mixing pipe 120 have the same features as the ones illustrated in Fig. 1 .
  • the inlet 170 for the pressurized gaseous medium is configured so that a source of the pressurized gaseous medium can be fluidically coupled to it.
  • the source of the pressurized gaseous medium is fluidically coupled to the inlet 170, the pressure inside the mixing container 100 can be held constant during actuation of the device 50. This results in consistent firefighting properties of the produced foam during actuation of the device 50.
  • the source can be a portable source, for example a commonly known portable gas container.
  • the source can also be a stationarily installed source that can be mounted, for example, in a building or on a firefighting vehicle.
  • Fig. 5 illustrates a schematic representation of an alternative closure for the mixing container 100 of Fig. 4 .
  • a possible flow of the pressurized gaseous medium is indicated by arrows.
  • Fig. 6 illustrates a schematic representation of a combination of the device 50 of Fig. 4 , the closure assembly of Fig. 5 and a pressure tank 200.
  • the pressure tank 200 is configured to store the pressurized gaseous medium.
  • a pressure line 210 extends from the pressure tank 200 to the mixing container 100.
  • a restriction valve 220 is located between the pressure line and an outlet 230 of the pressure tank 200.
  • the restriction valve 220 is configured to controllably release the pressurized gaseous medium from the pressure tank 200 into the mixing container 100.
  • the restriction valve 220 can be a common controllable check valve.
  • the pressure tank 200 is configured as a source of the pressurized gaseous medium and can be pressure-proof up to at least between 200 and 450 bar. Therefore, the pressure tank 200 is configured to have a small volume in comparison to the mixing tank 100. As a result, the illustrated combination of the mixing container 100 and the pressure tank 200 can still be configured portably.
  • Fig. 7 illustrates a schematic representation of a second fully operable firefighting device 350 comprising the assembly of Fig. 6 , the discharge line and the nozzle.
  • the device 350 incorporates all of the features described above with reference to Figs. 4 to 6 .
  • An actuation of the restriction valve 220 results in a flow of the pressurized gaseous medium from the pressure tank 200 through the pressure line 210 to the mixing container 100.
  • An additional actuation of the restriction valve 220 leads to a flow of the gaseous medium through the mixing passage 130 into the liquid medium and to a flow of the liquid medium towards the outlet 110 of the mixing container 100.
  • the pressure of the gaseous medium in the mixing container 100 can be kept at approximately 8.5 bar.
  • the mixture of the pressurized gaseous medium and the liquid medium flows into the discharge line 140 and towards the nozzle 160.
  • An additional actuation of the nozzle 160 then results in a constant and steady discharge of produced foam with consistent firefighting properties over the actuation time or until the liquid medium is discharged.
  • the firefighting properties of the foam produced by utilizing one of the fully operable firefighting devices 300, 350 of Fig. 3 and Fig. 7 can be controlled via the mixing ratio of the pressurized gaseous medium and the liquid medium and via the pressure at which the mixture is discharged. Consequently, regarding one type of foaming agent, a combination of the cross-sectional areas and the pressure of the pressurized gaseous medium inside the mixing container 100 determines the properties of the produced foam. If, for example, the ratio of the first cross-sectional area A 1 to the second cross-sectional area A 2 is high (e.g., 1:3 and above) the discharged mixture will contain so much of the pressurized gaseous medium that a resulting jet of the discharged medium will not be continuous.
  • the discharged mixture will contain so much of the liquid medium that the produced foam will not be homogenous.
  • the pressure of gaseous medium inside the mixing container 100 influences the size of the bubbles of the foam and the range of the resulting jet. In general, a higher pressure leads to smaller bubbles and a longer range of the resulting jet. Simultaneously, a higher pressure increases the possibility of turbulences in the resulting jet. Turbulences can lead to an uncontrollable jet. Therefore, finding the pressure resulting in the longest ranging controllable jet without turbulences can be seen as an optimization problem.
  • a constant discharge of a homogenous foam with a high range of the resulting jet is produced by guiding a gas-liquid mixture inside the mixing pipe 120 that is arranged within the mixing container 100 towards the container outlet 110.
  • a pressurized gaseous medium is introduced, via the mixing passage 130 comprised by a wall of the mixing pipe 120, from an outside of the mixing pipe 120 into the liquid medium when same is guided within the mixing pipe 120 towards the container outlet 110.
  • the mixing passage 130 has a first cross-sectional area A 1 .
  • a portion of the mixing pipe 120 downstream of the mixing passage 130, or a portion of a discharge line 140 downstream of the mixing pipe 120 has a second cross-sectional area A 2 .
  • a ratio of the first and second cross-sectional areas A 1 :A 2 between 1:4 and 1:25, in particular between 1:7 and 1:11.
  • a pressure of the gaseous medium inside the mixing container 100 is between 3 bar and 15 bar, in particular between 7 bar and 10 bar (e.g., between 8 and 9 bar).

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Accessories For Mixers (AREA)
  • Nozzles (AREA)
EP20162046.5A 2020-03-10 2020-03-10 Dispositif de production d'un mélange de gaz-liquide destiné à des fins de lutte contre l'incendie Pending EP3878524A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20162046.5A EP3878524A1 (fr) 2020-03-10 2020-03-10 Dispositif de production d'un mélange de gaz-liquide destiné à des fins de lutte contre l'incendie
CN202180028587.5A CN115427115B (zh) 2020-03-10 2021-03-10 用于产生消防目的的气液混合物的设备
PCT/EP2021/056017 WO2021180773A1 (fr) 2020-03-10 2021-03-10 Dispositif de production d'un mélange gaz-liquide à des fins de lutte contre l'incendie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20162046.5A EP3878524A1 (fr) 2020-03-10 2020-03-10 Dispositif de production d'un mélange de gaz-liquide destiné à des fins de lutte contre l'incendie

Publications (1)

Publication Number Publication Date
EP3878524A1 true EP3878524A1 (fr) 2021-09-15

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Application Number Title Priority Date Filing Date
EP20162046.5A Pending EP3878524A1 (fr) 2020-03-10 2020-03-10 Dispositif de production d'un mélange de gaz-liquide destiné à des fins de lutte contre l'incendie

Country Status (2)

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EP (1) EP3878524A1 (fr)
WO (1) WO2021180773A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998009683A1 (fr) * 1996-09-05 1998-03-12 Sundholm Goeran Installation anti-incendie
US5992530A (en) * 1996-09-05 1999-11-30 Sundholm; Goeran Installation for fighting fire
US6543547B2 (en) 2000-10-10 2003-04-08 Anton Neumeir Portable foam fire extinguisher with pressured gas foam
DE202014010053U1 (de) * 2014-12-05 2015-04-01 Jp Sicherheitstechnik Gmbh Anordnung zur Herstellung eines Löschmittel- oder Wirkstoffschaumes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101571003B1 (ko) * 2015-02-23 2015-11-23 주식회사 엠티케이방재시스템 압축공기포 소화장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998009683A1 (fr) * 1996-09-05 1998-03-12 Sundholm Goeran Installation anti-incendie
US5992530A (en) * 1996-09-05 1999-11-30 Sundholm; Goeran Installation for fighting fire
US6543547B2 (en) 2000-10-10 2003-04-08 Anton Neumeir Portable foam fire extinguisher with pressured gas foam
DE202014010053U1 (de) * 2014-12-05 2015-04-01 Jp Sicherheitstechnik Gmbh Anordnung zur Herstellung eines Löschmittel- oder Wirkstoffschaumes

Also Published As

Publication number Publication date
CN115427115A (zh) 2022-12-02
WO2021180773A1 (fr) 2021-09-16

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