JP6316563B2 - Fire extinguishing gas generator - Google Patents

Description

  The present invention relates to a small fire extinguishing gas generation apparatus having a small space such as an engine room of a vehicle as a protective compartment.

  A conventional fire extinguishing gas generator is disclosed in, for example, Patent Document 1. In this prior art, a fire extinguishing gas generator installed in an automobile is disclosed as an automatic fire extinguishing system for an automobile.

  The automatic fire extinguishing system for automobiles includes a gas generator that operates in conjunction with an air bag device, a fire extinguisher storage container that is pressurized by a gas generated by the operation of the gas generator, a fire extinguisher storage container, and a tip that is provided in the fire extinguisher storage container. A siphon tube that can be moved by its own weight to any position in the extinguishing agent storage container, and a nozzle with a fire detection function that is connected to the siphon tube via a pipe.

JP 2005-143856 A

  In the above-described prior art, the inside of the fire extinguisher storage container is normally in a non-pressure state, and the fire extinguisher storage container is pressurized when there is a risk of fire. The accidental release of the agent is prevented, and the tip of the siphon tube moves to the bottom of the fire extinguisher storage container, so that the fire extinguisher can be reliably released, no matter what direction the car falls over, Because it is equipped with a fire extinguisher storage container, the configuration is large, requires a large space for installation, and the installation position is limited, so the degree of freedom in installation is low, and it is close to a protective space in a small space such as an engine room. There is a problem that it cannot be installed at the site.

  An object of the present invention is to provide a fire extinguishing gas generator that reduces an occupied space required for installation and has improved flexibility in installation.

The present invention contains an igniting agent containing an igniting agent that generates a fire extinguishing gas by combustion, and having a discharge hole for releasing the fire extinguishing gas generated by the combustion of the igniting agent
An ignition unit that discharges or generates heat when energized, and ignition means that ignites the ignition agent in the ignition agent container by discharge or heat generation of the ignition unit;
Energization means for energizing the ignition unit;
A casing having a nozzle hole for mounting the ignition agent container and the ignition means, and communicating the discharge hole to the outside to inject the fire-extinguishing gas discharged from the discharge hole to the outside;
The casing has a passage forming body that forms a gas passage that guides a fire extinguishing gas generated from the igniting agent container to a nozzle hole,
A fire extinguisher characterized in that a dispersive member made of a metal porous material is interposed between the passage forming body and the igniting agent container to disperse a fire extinguishing gas that expands by combustion to reduce a flow velocity. It is a gas generator.

In the present invention, the casing is
A casing body having a recess in which the ignition agent container and the ignition means are accommodated;
And a nozzle portion that is provided integrally with the casing body and in which the nozzle hole is formed.

The present invention is the gas passage before Symbol passage defining member, wherein the filter comprising high porosity material gas permeability is interposed.

  Further, the present invention is characterized in that a dispersion member that disperses the fire extinguishing gas generated from the ignition agent and passes it to the passage formation side is interposed between the passage formation body and the ignition agent container. To do.

  Further, the present invention is characterized in that a decompression space for decompressing the fire extinguishing gas discharged from the orifice is provided between the orifice and the nozzle hole of the passage forming body.

According to the present invention, when the ignition unit of the ignition unit is energized by the energization unit, the ignition unit discharges or generates heat, and the ignition agent in the ignition agent container is ignited. The igniting agent burns when ignited, and generates a fire extinguishing gas by the combustion reaction. The fire extinguishing gas generated from the igniting agent is discharged from the discharge hole through the dispersing member interposed between the passage forming body and the igniting agent container, and is discharged to the outside from the nozzle hole of the casing.

Thus, the fire extinguishing gas generator is configured to generate a fire extinguishing gas from the igniting agent by energizing the ignition unit by the energizing means, and to release the fire extinguishing gas from the nozzle hole through the dispersion member and the discharge hole. Therefore, the fire extinguishing gas that expands rapidly due to the combustion of the igniting agent is dispersed by the dispersing member to reduce the flow velocity, thereby suppressing the rapid injection of the fire extinguishing gas and without requiring a storage container for storing the fire extinguishing gas. In addition, a fire extinguishing gas generator can be realized with a small and simple configuration, the occupied space required for installation can be reduced, and the degree of freedom in installation can be increased.

  As a result, the fire extinguishing gas generator can be installed in a narrow space such as in the hood of an automobile, for example, and can be operated independently by operating a control device such as an air bag or by operating the driver's operation switch. The generated fire extinguishing gas can be discharged into the protective compartment, and the fire extinguishing gas in the protective compartment can be extinguished or extinguished, or fire can be prevented.

In addition, since the fire extinguishing gas generator is small, when the volume of the protective compartment is large and when the necessary gas amount cannot be generated by one fire extinguishing gas generator, the generated gas amount exceeds the flame extinguishing concentration. It is also possible to install multiple fire extinguishing gas generators in the same protective section as the fire extinguishing target space, and the number of installations can be easily selected according to the required gas volume, which is convenient for installation. it is possible to improve the sex.

  Further, according to the present invention, the igniting agent container and the ignition means are mounted in the recess of the casing main body, and the nozzle portion is provided integrally with the casing main body, so that the entire apparatus can be realized with a simple configuration, The occupied space required for installation can be reduced, and the degree of freedom in arrangement such as the orientation at the installation location can be improved.

  Further, according to the present invention, the passage forming body is accommodated in the recess, and the filter is interposed in the gas passage of the passage forming body, so that foreign matters such as residues generated by the combustion of the igniting agent enter the protective compartment. Can be prevented.

  Further, according to the present invention, since the orifice that restricts the flow rate of the fire extinguishing gas that has passed through the filter is provided in the passage forming body, the intrusion of the gas into the protective compartment is prevented, and by the rapid injection of the fire extinguishing gas, It is possible to prevent damage caused by gas pressure on an object placed in the protective compartment.

  Further, according to the present invention, since the decompression space is provided between the orifice of the passage forming body and the nozzle hole, the high-temperature fire extinguishing gas generated by the combustion from the ignition agent container is cooled and injected into the protective compartment. The temperature of the fire extinguishing gas can be reduced, and damage to objects placed in the protective compartment due to heat can be prevented.

1 is a system diagram schematically showing a configuration of a vehicle fire extinguishing system 2 including a fire extinguishing gas generator 1 according to an embodiment of the present invention. It is an expanded sectional view showing composition of a fire extinguishing gas generator. FIG. 3 is an enlarged cross-sectional view seen from a section line III-III in FIG. 2. It is a flowchart for demonstrating operation | movement of a vehicle fire extinguishing system.

  FIG. 1 is a system diagram schematically showing the configuration of a vehicle fire extinguishing system 2 including a fire extinguishing gas generator 1 according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view showing the configuration of the fire extinguishing gas generator 1. is there. In the present embodiment, a fire extinguishing gas generator 1 applied to a vehicle fire extinguishing system 2 installed in a vehicle will be described.

Vehicle fire extinguishing system 2 is fixed to the mounting member 30, such as a bracket fixed to a vehicle body of the hood portion or bonnet portion, quenching concentration extinguishing gas concentration of the protective compartment M defining the extinguishing object space, such as hood space extinguishing gas generator 1a of the plurality (2 in this embodiment) to release the gas volume necessary for the above, 1b (when generically, subscripts a, omitted b) and is mounted on the body An impact detection device 3 that detects an impact received by a vehicle and outputs an impact detection signal, and an impact detection signal output from the impact detection device 3. In response, the airbag device 4 installed in the vehicle is activated to inflate the airbag, and the extinguishing gas generators 1a and 1b are activated to generate the extinguishing gas. That a control unit 5 configured to include an input unit 31 having an operation switch for generating a fire extinguishing gas driver operates.

The fire extinguishing gas is realized by an incombustible gas such as N ₂ gas, CO ₂ gas and halide gas, and the concentration of the extinguishing gas in the fire extinguishing target space is extinguished by releasing such an incombustible gas as the extinguishing gas. It is possible to reduce the O ₂ concentration in the fire extinguishing target space and to extinguish the fire or suppress the ignition in advance. The fire extinguishing gas in the present embodiment is composed of a gas component composed of approximately 30% N ₂ gas, approximately 20% CO ₂ gas, and approximately 50% H ₂ O. Moreover, since such a fire extinguishing gas includes not only the oxygen reduction of N ₂ gas but also CO ₂ gas generated almost simultaneously, the fire extinguishing effect can be promoted by the cooling action by the CO ₂ gas. As the igniting agent 10 that generates such a fire extinguishing gas, for example, nitrocellulose can be used.

  A mounting hole 31 is formed in the mounted body 30, and a cylindrical portion 20 a in which an external thread is engraved on the outer peripheral portion of the nozzle portion 20 described later is inserted into the mounting hole 31. A pair of washers 32a and 32b and a pair of nuts 33a and 33b are attached to the cylindrical portion 20a, and the washers 32a and 32b and the nuts 33a and 33b are attached so as to sandwich the mounted body 30 from both sides in the thickness direction. By tightening the nuts 33a and 33b so as to be close to each other, the mounted body 31 is sandwiched from both sides, and each fire extinguishing gas generator is mounted and fixed perpendicularly to the main surface of the mounted body 30. Yes.

  The method of attaching each fire extinguishing gas generator 1a, 1b to the body 30 is not limited to this, and other methods such as welding, riveting, screwing, press fitting, etc. are attached. It can be appropriately selected according to the installation environment such as the structure of the body 30 and the surrounding space.

  The control device 5 is realized by a computer including a central processing unit (abbreviated as CPU). The control device 5 is electrically connected to the impact detection device 3, the fire extinguishing gas generation devices 1a and 1b, and the airbag device 4 through flexible cables 6 to 9, respectively.

  The extinguishing gas generator 1 contains an igniting agent 10 that generates an extinguishing gas by combustion, and a substantially cup-shaped igniting agent containing container 12 having a discharge hole 11 for releasing the extinguishing gas generated by the combustion of the igniting agent 10. Including an igniting agent containing body 13 and an igniter 14 that discharges or generates heat when energized, and ignites the igniting agent 10 in the igniting agent containing body 13 by discharging or generating heat. Fire extinguishing of the above-mentioned protective section M which is equipped with the means 15 and the above-mentioned control device 5 which is an energizing means for energizing the igniter 14, the igniting agent container 13 and the ignition means 15. A substantially cylindrical nozzle hole 16 whose ends are chamfered in a truncated cone shape for injecting a fire extinguishing gas discharged from the discharge hole 11 into the fire extinguishing target space of the protection section M in communication with the target space. And a casing 17 having.

  The casing 17 is provided with the igniting agent container 13 and the ignition means 15, and a casing body 19 having a recess 18 communicating with the nozzle hole 16, and a nozzle provided integrally with the casing body 19, in which the nozzle hole 16 is formed. Part 20. The casing 17 is made of, for example, stainless steel.

  The ignition means 15 includes, for example, a pair of electrode pins 15b and 15c inserted and held in a plug body 15a made of a synthetic resin having electrical insulation, and an ignition portion 14 is provided at one tip of each of the electrode pins 15b and 15c. Provided. The ignition unit 14 has a heating resistance wire 14a connected to one tip of each of the electrode pins 15b and 15c. A cable 7 is connected to a portion of each electrode pin 15b, 15c projecting from the plug 14a to the outside (right side in FIG. 2), and an ignition signal is given from the control device 5 via the cable 7 to generate a heating resistor. The body 14a generates heat, is ignited by the igniting agent 10, and undergoes a rapid combustion reaction, that is, an explosion to generate a fire extinguishing gas. In another embodiment of the present invention, the igniting agent 10 is ignited by a spark caused by discharge between one end of each of the electrode pins 15b and 15c, instead of the configuration in which the heating resistance wire 14a generates heat by energization. Also good.

  The recess 18 has a cylindrical first space 18a that communicates with the nozzle hole 16, a first end that communicates with the first space 18a, a cylindrical second space 18b that has a larger diameter than the first space 18a, and one end that It is configured to include a columnar third space 18c that communicates with the second space 18b and that is open at the other end. An inner screw 21 is engraved on the inner peripheral portion of the casing body 19 facing the third space 18c.

  FIG. 3 is an enlarged cross-sectional view taken along the section line III-III in FIG. In the first space 18 a of the recess 18, a passage forming body 23 having a gas passage for guiding the fire extinguishing gas generated from the igniting agent containing body 13 to the nozzle hole 16 is press-fitted and airtightly accommodated. A columnar filter 24 made of a metal porous material having a high gas permeability and continuously forming columnar voids is interposed in the gas passage.

The passage forming body 23 includes the above-described filter 24 and a substantially cup-shaped case 25 that houses the filter 24. The case 25 is provided with a plurality (four in this embodiment) of orifices 26 for limiting the flow rate of the fire extinguishing gas that has passed through the filter 24. Case 25 is made of, for example, stainless steel.

  In the present embodiment, the term “orifice” is a “choke” in which the flow path length L is a hole having an inner diameter D or more (L / D ≧ 1) and the inner diameter D is less than the flow path length L (L It is used synonymously with “diaphragm” including “orifice” which is a hole of / D <1).

  A disc-shaped dispersion member made of a metal porous material that disperses the fire extinguishing gas generated from the ignition agent 10 and passes it to the passage formation body 23 side between the passage formation body 23 and the ignition agent container 13. 27 is interposed. The porous material of the dispersion member 27 is intended to disperse the fire extinguishing gas that rapidly expands by combustion and reduce the flow rate of the fire extinguishing gas. Therefore, the porosity is higher than the porous material of the filter 24 and the pressure loss is less. Things are used.

  An annular first chamber 29 a for reducing the pressure of the fire extinguishing gas discharged from each orifice 26, the first chamber 29 a and the nozzle hole 16 is connected between each orifice 26 and the nozzle hole 16 of the passage forming body 23. A decompression space 29 having a disk-shaped second chamber 29b is provided.

  FIG. 4 is a flowchart for explaining the operation of the vehicle fire extinguishing system. In the same figure, step s1 is operation | movement of the impact detection apparatus 3, step s2, s3 is operation | movement of the control apparatus 5, and step s4 shows operation | movement of each fire extinguishing gas generator 1a, 1b.

  First, in step s1, when the ignition switch of the vehicle is turned on and the impact detection device 3, the control device 5 and the airbag device 4 are operable, the impact detection device 3 detects the impact of the vehicle in step s1. Then, the impact detection signal is output from the impact detection device 3 to the control device 5.

  In step 2, when an impact detection signal from the impact detection device 3 is input to the control device 5, the control device 5 sends an airbag operation signal to the airbag device 4 in response to the input impact detection signal. An inflation signal is output to inflate the airbag, and in step s3, an ignition signal is output to the ignition part 14 of each fire extinguishing gas generating means 1a, 1b, and the ignition part 14 is energized.

  When the ignition unit 14 is energized, the ignition unit 14 is discharged or generates heat, and the ignition agent in the ignition agent container 13 is ignited. The igniting agent burns when ignited, and generates a fire extinguishing gas by the combustion reaction. The fire extinguishing gas generated from the igniting agent is discharged from the discharge hole 11, passes through the filter 24 in the passage forming body 23, and is discharged from the nozzle hole 16 of the casing 17 into the fire extinguishing target space which is the protection section M in step s 4. Is done.

  Thus, each fire extinguishing gas generator 1a, 1b abruptly generates a fire extinguishing gas from the igniting agent 10 by energizing the ignition unit 14 by the control device 5 as the energizing means, and the fire extinguishing gas is discharged from the nozzle hole 16. Since it is configured to release, it does not require a storage container for storing fire extinguishing gas as in the prior art, and is realized by a small and simple configuration, reducing the occupied space required for installation, The degree of freedom can be increased.

  Thus, the fire extinguishing gas generator 1 can be easily installed on the vehicle body or a mounted body 30 such as a bracket fixed to the vehicle body even in a narrow space such as in the hood of an automobile. The fire extinguishing gas generated is released into the protective compartment M by operating in conjunction with the control device 5 or by operating the input unit 31 such as a driver's operation switch, and the concentration of the fire extinguishing gas in the protective compartment M is set. Extinguishing fires or preventing fires by setting the flame extinguishing concentration or higher.

  Further, since the fire extinguishing gas generator 1 is small, when the volume of the protection section M is large and when one fire extinguishing gas generator 1 cannot generate a necessary gas amount, the generated gas amount is It is also possible to install a plurality of fire extinguishing gas generators 1a, 1b in the same protective section M as a fire extinguishing target space so that the flame extinguishing concentration or more is selected, and the number of installations is easily selected according to the required gas amount. It is possible to improve the convenience of installation.

  Further, since the igniting agent container 13 and the ignition means 15 are mounted in the recess 18 of the casing body 19 and the nozzle portion 20 is provided integrally with the casing body 19, the entire apparatus can be realized with a simple configuration. Therefore, the occupied space required for installation can be reduced, and the degree of freedom in arrangement such as the orientation at the installation location can be improved.

  In addition, since the passage forming body 23 is accommodated in the recess 18 and the filter 24 is interposed in the gas passage of the passage forming body 23, foreign substances such as residues generated by the combustion of the igniting agent 10 into the protective section M can be obtained. Intrusion can be prevented.

  Further, since the orifice 26 that restricts the flow rate of the fire extinguishing gas that has passed through the filter 24 is provided in the passage forming body 23, the gas can be prevented from entering the protective section M rapidly, and the fire protection gas can be protected by the rapid injection of the fire extinguishing gas. Damage due to gas pressure of an object disposed in the compartment M can be prevented.

  Further, since the dispersion member 27 is interposed between the passage forming body 23 and the igniting agent containing body 13, damage to the filter 24 due to sudden generation of fire extinguishing gas can be prevented.

  Further, since the decompression space 29 is provided between the orifice 26 of the passage forming body 23 and the nozzle hole 16, the high-temperature fire extinguishing gas generated by the combustion from the ignition agent container 13 is cooled and injected into the protection section M. Thus, the temperature of the fire extinguishing gas can be lowered, and damage to the object placed in the protection section M due to heat can be prevented.

DESCRIPTION OF SYMBOLS 1; 1a, 1b Fire extinguisher gas generator 2 Vehicle fire extinguishing system 3 Impact detection apparatus 4 Air bag apparatus 5 Control apparatus 6-9 Cable 10 Ignitant 11 Release hole 12 Ignitant accommodating container 13 Ignitant accommodating body 14 Ignition part 15 Ignition means 16 Nozzle Hole 17 Casing 18 Recess 19 Casing Body 20 Nozzle Part 23 Passage Forming Body 24 Filter 25 Case 26 Orifice 27 Dispersing Member 29a First Chamber 29b Second Chamber 29 Depressurization Space M Protective Section

Claims (5)

An igniting agent that generates an extinguishing gas by combustion and contains an igniting agent container having a discharge hole for releasing the extinguishing gas generated by the combustion of the igniting agent;
An ignition unit that discharges or generates heat when energized, and ignition means that ignites the ignition agent in the ignition agent container by discharge or heat generation of the ignition unit;
Energization means for energizing the ignition unit;
A casing having a nozzle hole for mounting the ignition agent container and the ignition means, and communicating the discharge hole to the outside to inject the fire-extinguishing gas discharged from the discharge hole to the outside;
The casing has a passage forming body that forms a gas passage that guides a fire extinguishing gas generated from the igniting agent container to a nozzle hole,
A fire extinguisher characterized in that a dispersive member made of a metal porous material is interposed between the passage forming body and the igniting agent container to disperse a fire extinguishing gas that expands by combustion to reduce a flow velocity. Gas generator. The casing is
A casing body having a recess in which the ignition agent container and the ignition means are accommodated;
The fire extinguishing gas generator according to claim 1, further comprising: a nozzle portion that is provided integrally with the casing body and in which the nozzle hole is formed. The said gas passage before Symbol passage defining member, fire extinguishing gas generator according to claim 1 or 2, characterized in that the filter consists of high porosity material gas permeability is interposed.   The fire extinguishing gas generator according to claim 3, wherein the passage forming body is provided with an orifice for limiting a flow rate of the fire extinguishing gas that has passed through the filter.   The fire extinguishing gas generator according to claim 4, wherein a decompression space for decompressing the fire extinguishing gas discharged from the orifice is provided between the orifice of the passage forming body and the nozzle hole.

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