Fire extinguisher

Abstract

------05 / 03 / 2562------(OCR) Page 1 of the 1st page of the Invention Summary: To provide a portable fire extinguisher suitable for initial fire extinguishing, a fire extinguisher 1 that uses inert gas as an agent for fire extinguishing that is not restricted in terms of the object to be extinguished and the method of use, due to its toxicity to the human body and to make it easy to maintain the necessary concentration of the fire extinguishing agent, thus ensuring a stable and effective fire extinguishing effect. It has a fire extinguishing agent retention container 2, a nozzle 3 to release the fire extinguishing agent to the connected and portable so that the fire extinguishing agent can be released to the object to be extinguished, and nitrogen gas is retained in the fire extinguishing agent retention container and at the outlet of the fire extinguishing agent flow path, which is molded in the nozzle 3, a perforated metal assembly 31 is installed. ------------ Page 1 of 1 Summary of the invention. In order to provide suitable portable fire extinguishers for initial fire suppression, Fire extinguisher 1, which uses agents to extinguish inert gases, and others, without limitation, on the object to be extinguished. And the method of use, due to its toxicity to the human body, makes it easy to treat. The necessary concentration of the fire extinguishing agent is required, thus ensuring effective fire extinguishing results. Efficient, it has two containers for storing fire extinguishing agent and three nozzles for releasing the agent. The fire extinguishing system is connected and movable so that it can release the substance for Fire extinguishers are directed toward the object to be extinguished, and nitrogen gas is stored in containers. Store fire extinguishing agents and locate the outlet of the extinguishing agent flow path. Formation in the nozzle section 3, perforated metal assembly 31 in which it is installed.

Description

Fire extinguisher The present invention relates to a fire extinguisher, and more particularly to a portable or semi - fixed fire extinguisher used for initial fire extinguishing. Conventionally, as portable or semi - fixed fire extinguishers used for initial fire extinguishing, those using liquid fire extinguishing agents or powder fire extinguishing agents such as water fire extinguishers, foam fire extinguishers, and powder fire extinguishers are widely used. By the way, fire extinguishers using liquid or powder as fire extinguishing agents have simple structures of component devices such as nozzles and fire extinguishing agent containers, are easy to handle, and are also easy to store. Therefore, they have been widely used for various fire extinguishing targets conventionally. However, when using a fire extinguisher that uses liquid or powder as the fire extinguishing agent to extinguish a fire, the liquid or powder fire extinguishing agent scatters and pollutes the surrounding environment, and subsequent treatment requires effort. Therefore, it cannot be used for fire extinguishing targets that dislike pollution. In particular, for facilities equipped with electrical and electronic equipment such as computers, communication equipment, data centers, and electrical equipment, it cannot be used because it will cause catastrophic damage to the equipment. For this reason, for these fire extinguishing targets, fixed fire - fighting equipment using gas - based fire extinguishing agents such as carbon dioxide, halides, inert gases (inert gases such as nitrogen gas and argon, either alone or mixed. The same applies hereinafter) has been used (for example, see Patent Document 1). Japanese Patent Application Laid - Open No. 8 - 299492, Patent No. 5502157, Patent No. 3398624, Patent No. 3058841 By the way, since the fixed fire - fighting equipment using a gas - based fire extinguishing agent fills the entire equipment space where electrical and electronic equipment is installed with the gas - based fire extinguishing agent to extinguish the fire, when using the fire - fighting equipment to extinguish the fire, subsequent treatment requires effort and cost. Therefore, it is not necessarily suitable for use in initial fire extinguishing. That is, for example, a volume of 1000 m ３If a conventional nitrogen gas fire extinguishing system, which uses nitrogen gas as a gas-based fire extinguishing agent, is installed in a section, 26 fire extinguishing agent storage containers with a volume of 83L are required. When the system is activated, all of the fire extinguishing agent storage containers are released, and the fire is extinguished by bringing the entire section to the necessary fire extinguishing agent concentration (flame extinguishing concentration). However, even for very small fires that can be dealt with by initial fire suppression, the system will release all of the fire extinguishing agent storage containers when activated, so the process of refilling and replacing them requires time and expense, and therefore it is not necessarily suitable for use in all fires. On the other hand, there are portable or semi-fixed fire extinguishers that use carbon dioxide or halogenated compounds as extinguishing agents, which are suitable for initial fire suppression using gaseous extinguishing agents. However, these have problems such as restrictions on the targets of fires and methods of use due to the toxicity of the extinguishing agents to the human body, as well as restrictions due to halon regulations. Furthermore, portable or semi-fixed fire extinguishers using inert gases as extinguishing agents have not been put into practical use. For example, in the case of nitrogen gas, which is a typical inert gas, compared to other gas-based extinguishing agents such as carbon dioxide, its specific gravity is low and the concentration of the extinguishing agent required for extinguishing is high. As a result, even if nitrogen gas is discharged towards the target of a fire, it disperses rapidly, making it difficult to concentrate it on the target. Moreover, the discharged nitrogen gas is easily blown away by the airflow, making it difficult to maintain the necessary concentration of the extinguishing agent. If there is an ember, it will immediately reignite, making it difficult to obtain an effective extinguishing effect. In view of the problems with the conventional portable or semi-fixed fire extinguishers used for initial fire suppression, the present invention aims to provide a portable or semi-fixed fire extinguisher suitable for initial fire suppression that uses an inert gas or the like as the extinguishing agent, which is not restricted in terms of the target of the fire or the method of use due to the toxicity of the extinguishing agent to the human body, and makes it easier to maintain the necessary concentration of the extinguishing agent for fire suppression, thereby obtaining an effective fire suppression effect. To achieve the above objective, the present invention provides a fire extinguisher in which at least the nozzle portion for discharging the fire extinguishing agent is configured to be portable by a person so that the fire extinguishing agent can be discharged toward the target of the fire, wherein the fire extinguishing agent is a gaseous fire extinguishing agent supplied from a fire extinguishing agent supply means, and a porous metal member is provided at the outlet of the fire extinguishing agent flow path formed in the nozzle portion. In this case, the fire extinguishing agent supply means consists of a fire extinguishing agent storage container, and a nozzle portion is rigidly connected to the fire extinguishing agent storage container, and the fire extinguishing agent storage container can be made portable by a person. Furthermore, the fire extinguishing agent supply means consists of a fire extinguishing agent storage container, and a nozzle portion is connected to the fire extinguishing agent storage container via a flexible hose, allowing the fire extinguishing agent storage container to be fixed in place. A regulator equipped with a pressure reducing function and / or flow rate adjustment function can be provided in the flow path of the fire extinguishing agent from the fire extinguishing agent supply means to the nozzle. Furthermore, the opening diameter of the nozzle portion can be set to 50 mm or more. Furthermore, the nozzle section can be composed of an assembly of multiple nozzle sections. Furthermore, a gaseous fire extinguishing agent mainly composed of inert gas can be used as the fire extinguishing agent. According to the present invention, in a fire extinguisher in which at least the nozzle for discharging the extinguishing agent is portable by a person so that the extinguishing agent can be discharged toward the target of the fire, a gaseous extinguishing agent is supplied from an extinguishing agent supply means as the extinguishing agent, and a porous metal member is provided at the outlet of the extinguishing agent flow path formed in the nozzle. As a result, when a fire is extinguished using the fire extinguisher, the extinguishing agent does not contaminate the surrounding environment and the extinguishing agent is not toxic to the human body, thus enjoying the characteristics of inert gases, etc., which do not restrict the target of the fire or the method of use, while the extinguishing agent discharged toward the target of the fire travels in a straight line without scattering, making it possible to concentrate the extinguishing agent on the target of the fire, making it easier to maintain the necessary concentration of the extinguishing agent, thereby providing a portable or semi-fixed fire extinguisher suitable for initial fire suppression that can be used to achieve an effective fire suppression effect. Furthermore, by having the fire extinguishing agent supply means consist of a fire extinguishing agent storage container, with a nozzle connected to the fire extinguishing agent storage container by a rigid joint, and by making the fire extinguishing agent storage container portable by a person, it is possible to provide a portable fire extinguisher that is easy to use and suitable for initial fire suppression. Furthermore, by having the fire extinguishing agent supply means consist of a fire extinguishing agent storage container, with a nozzle connected to the fire extinguishing agent storage container via a flexible hose, and by fixing the fire extinguishing agent storage container in place, it is possible to provide a semi-fixed fire extinguisher suitable for initial fire suppression with a large capacity. Furthermore, by providing a regulator with a pressure reduction function and / or flow rate adjustment function in the flow path of the fire extinguishing agent from the fire extinguishing agent supply means to the nozzle, it is possible to adjust the pressure (primary pressure) of a gaseous fire extinguishing agent, such as nitrogen gas, which is mainly composed of inert gas stored at high pressure in a fire extinguishing agent storage container, to a pressure (secondary pressure) that is easy to use, or to maintain a nearly constant flow rate of the fire extinguishing agent regardless of pressure changes in the fire extinguishing agent, thereby enabling stable fire extinguishing. Furthermore, by setting the opening diameter of the nozzle to 50 mm or more, it is possible to set a larger range over which the fire extinguishing agent discharged toward the target of the fire can maintain the necessary concentration of the fire extinguishing agent. Furthermore, by configuring the nozzle section as an assembly of multiple nozzle sections, it is possible to set a larger range over which the fire extinguishing agent concentration necessary for fire extinguishing can be maintained when discharged toward the target of the fire. Furthermore, a gaseous fire extinguishing agent mainly composed of inert gas can be suitably used as the fire extinguishing agent. This is an explanatory diagram showing a first embodiment of the fire extinguisher of the present invention. This diagram shows the nozzle section of the fire extinguisher, where (a) is an external view seen from the opening side, (b) is an external view seen from the connection side, and (c) is a cross-sectional view taken along X-X in (b). This is a graph showing the results of measuring the relationship between the distance from the nozzle and the oxygen concentration when various nozzles are used. This is an explanatory diagram showing a modified example of the first embodiment of the fire extinguisher of the present invention. This is an explanatory diagram showing a second embodiment of the fire extinguisher of the present invention. This is an explanatory diagram showing the internal structure of the fire extinguishing agent storage container and container valve of a third embodiment of the fire extinguisher of the present invention. This is an explanatory diagram showing the internal structure of the fire extinguishing agent storage container and container valve of a modified example of the third embodiment of the fire extinguisher of the present invention. This is an explanatory diagram showing a modified example of the third embodiment of the fire extinguisher of the present invention. This is an explanatory diagram showing a fourth embodiment of the fire extinguisher of the present invention. This is an explanatory diagram showing a fifth embodiment of the fire extinguisher of the present invention. This is an explanatory diagram showing an example of the structure of the fire extinguisher, where (a) is an external view seen from the opening side, (b) is a cross-sectional view taken along Y-Y in (a), and (c) is an enlarged cross-sectional view of the nozzle section. This is an explanatory diagram showing an example of the structure of the fire extinguisher, where (a) is an external view seen from the opening side, (b) is a Z-Z cross-sectional view of (a), and (c) is an enlarged cross-sectional view of the nozzle section. This is an explanatory diagram showing a first reference example of a local fire extinguishing system using the nozzle section of the fire extinguisher of the present invention. This is an explanatory diagram showing a second reference example of a local fire extinguishing system using the nozzle section of the fire extinguisher of the present invention. Hereinafter, embodiments of the fire extinguisher of the present invention will be described with reference to the drawings. Figures 1 and 2 show a first embodiment of the fire extinguisher of the present invention. This fire extinguisher 1 uses nitrogen gas, a typical inert gas, as its extinguishing agent (however, various inert gases other than nitrogen gas, such as argon, or mixtures of multiple types of inert gases including nitrogen gas, can also be used as extinguishing agents). It is configured to be portable by a person, with a fire extinguishing agent storage container 2 connected to a nozzle 3 for discharging the extinguishing agent so that the extinguishing agent can be discharged towards the target of the fire. Nitrogen gas is stored in the fire extinguishing agent storage container 2, and a porous metal member 31 is provided at the outlet of the extinguishing agent flow path formed in the nozzle 3. In this case, the fire extinguishing agent storage container 2 and the nozzle section 3 are connected by a rigid joint via a control device 4 that controls the release of the fire extinguishing agent, which is commonly used in fire extinguishers and fire extinguishing equipment that use gaseous fire extinguishing agents, such as a container valve 41, an opening device 42, and a regulator 43. Here, it is preferable that the regulator 43 has a pressure reduction function that reduces the pressure (primary pressure) of the nitrogen gas stored at high pressure in the fire extinguishing agent storage container 2 to a usable pressure (secondary pressure), as well as a pressure regulating function that keeps the secondary pressure constant, and a flow rate adjustment function that keeps the flow rate of the fire extinguishing agent approximately constant regardless of pressure changes of the fire extinguishing agent, thereby enabling stable fire extinguishing. For this purpose, for example, the constant flow valve previously proposed by the applicant (see Patent Document 2) can be suitably used. Furthermore, the fire extinguishing agent storage container 2 and the nozzle unit 3 do not necessarily need to be connected by a rigid joint; for example, the nozzle unit 3 can be connected to the fire extinguishing agent storage container 2 via a flexible tube. Here, in order to provide a portable fire extinguisher suitable for initial fire suppression, this fire extinguisher 1 uses nitrogen gas as the extinguishing agent and employs a nozzle section 3 for discharging the extinguishing agent, as shown in Figure 2, which allows the extinguishing agent discharged towards the target of the fire to travel in a straight line without scattering, and to concentrate the discharge of the extinguishing agent towards the target of the fire. The nozzle section 3 consists of a nozzle body 30 connected to the piping on the fire extinguishing agent storage container 2 side, an orifice plate 32 having a plurality (six in this embodiment) of orifices 32a detachably disposed on a stepped portion 30a formed in the internal space of the nozzle body 30, a block-shaped porous metal member 31 through which gas can flow, disposed at the outlet of the orifice 32a, and a ring member 30b that abuts the peripheral edge of the end face of the porous metal member 31 that is open to the atmosphere and supports the porous metal member 31 on the nozzle body 30. The orifice plate 32, which has multiple orifices 32a formed on it, is detachably mounted on a stepped portion 30a formed in the internal space of the nozzle body 30, for example, via screws formed on the stepped portion 30a and the circumferential surface of the orifice plate 32. This allows for the selection of an orifice plate 32 having multiple types of orifices 32a depending on the usage conditions. Alternatively, the orifice plate 32 can be omitted, and a similar orifice can be directly formed in the nozzle body 30 (not shown). Furthermore, it is preferable that the orifice 32a is formed so that the smaller diameter side of the orifice 32a faces the porous metal member 31. This allows nitrogen gas to be uniformly circulated from the center to the periphery of the porous metal member 31, thereby enabling uniform emission of nitrogen gas from the entire surface of the end face of the porous metal member 31 that is exposed to the atmosphere. The porous metal member 31 can be constructed as a single, integrated structure, or, as shown in this embodiment, as a divided structure consisting of an upstream member 31a and a downstream member 31b. The porous metal member 31 can preferably be a sintered body made of an inorganic material (metal, metal oxide, metal hydroxide, etc.) with high shape retention performance, or a porous metal body made of a three-dimensional network structure. The pore diameter of the voids in the material constituting the porous metal member 31 can be made from a homogeneous material, or from a material whose pore diameter is varied in the direction of gas flow, or more specifically, from a material whose pore diameter is reduced in the direction of gas flow. For example, in this embodiment, the material can be such that the pore diameter of the voids in the downstream member 31b is smaller than that of the upstream member 31a. In this way, by reducing the pore diameter of the voids in the material constituting the porous metal member 31 in the direction through which the gas flows, nitrogen gas can be uniformly radiated from the entire surface of the end face of the porous metal member 31 that is open to the atmosphere. In both the case of an integrated structure and a segmented structure, the end face of the metal porous member 31 opposite to the side exposed to the atmosphere is arranged in contact with the nozzle body 30 (including the orifice plate 32 in this embodiment), and the end face of the metal porous member 31 that is exposed to the atmosphere is supported by the nozzle body 30 via a ring member 30b that abuts against the peripheral edge of this end face. In this case, the ring member 30b is detachably attached to the nozzle body 30 via threads formed on the circumferential surfaces of the nozzle body 30 and the ring member 30b. Furthermore, by forming the downstream member 31b constituting the porous metal member 31 with a larger diameter than the upstream member 31a, and by fixing the outer peripheral edge of the downstream member 31b by sandwiching it between the end face of the nozzle body 30 and the edge of the ring member 30b, the opening area (opening diameter) of the porous metal member 31 (downstream member 31b) that is open to the atmosphere can be made larger, and the range in which the concentration of the extinguishing agent necessary for firefighting can be maintained for nitrogen gas discharged toward the target of firefighting can be made larger. Here, the size of the opening area (opening diameter) of the porous metal member 31 (downstream member 31b) that is open to the atmosphere determines the range in which the concentration of the extinguishing agent necessary for extinguishing a fire with nitrogen gas can be maintained (approximately several times the opening area). Therefore, the opening diameter is set to 50 mm or more, preferably 70 mm or more, and more preferably 100 mm. This fire extinguisher 1 takes advantage of the characteristics of inert gas (nitrogen gas), which means that when used to extinguish a fire, the extinguishing agent does not contaminate the surrounding environment and the extinguishing agent is not toxic to humans, thus allowing for no restrictions on the target of extinguishing or the method of use. Furthermore, the extinguishing agent discharged towards the target of extinguishing travels in a straight line without scattering, allowing for concentrated discharge of the extinguishing agent to the target, making it easier to maintain the necessary concentration of the extinguishing agent, thereby achieving an effective fire extinguishing effect. In particular, it is useful as a portable fire extinguisher suitable for initial fire suppression. Next, the specifications and operation of a specific example of this fire extinguisher 1 will be described. Weight of the fire extinguishing agent storage container (including nozzle): Approximately 17 kg Weight of nitrogen gas to be filled: approximately 4 kg Nitrogen gas filling pressure: approximately 30 MPa Duration of nitrogen gas emission: approximately 15 seconds Distance to the target of the fire: within approximately 2 meters The range within which the necessary concentration of extinguishing agent for nitrogen gas fire suppression can be maintained is several times the opening area of ​​the porous metal member (downstream member) of the nozzle that is exposed to the atmosphere (opening diameter D of the porous metal member (downstream member) in this embodiment: approximately 100 mm). Porous metal material: A porous metal body consisting of a three-dimensional mesh-like structure (Sumitomo Electric Industries, Ltd.'s "Cellmet" (registered trademark)). Figure 3 shows the results of measuring the relationship between the distance from the nozzle and the oxygen concentration on the central axis of the nozzle's discharge direction of the fire extinguishing agent (nitrogen gas) when using various types of nozzles. Here, a full-range nozzle is a nozzle with a single small hole at its tip to discharge the fire extinguishing agent (nitrogen gas) towards the target of the fire, while a localized nozzle is a nozzle commonly used for carbon dioxide, with multiple small holes arranged horizontally at its tip, the entire tip of the nozzle covered by a horn, and the fire extinguishing agent (nitrogen gas) discharged from the opening at the tip of the horn towards the target of the fire. As is clear from Figure 3, the nozzle of this embodiment was confirmed to be able to maintain the necessary extinguishing agent concentration (flame suppression concentration) for extinguishing a fire with nitrogen gas in a range of 1 to 1.5 m from the target of extinguishing (this range can be expanded by increasing the opening diameter D of the porous metal member (downstream member)), which was difficult with full-range nozzles or localized nozzles. By the way, in the fire extinguisher 1 of the first embodiment described above, the nitrogen gas stored at high pressure in the fire extinguishing agent storage container 2 is depressurized in the nozzle section 3, which is equipped with a porous metal member 31 and an orifice 32a. Therefore, by adjusting the magnitude of the pressure (primary pressure) of the nitrogen gas stored in the fire extinguishing agent storage container 2 and the porous metal member 31 and orifice 32a installed in the nozzle section 3, the regulator 43 among the control devices 4 can be omitted, as shown in the modified example of the first embodiment of the fire extinguisher of the present invention in Figure 4. Figure 5 shows a second embodiment of the fire extinguisher of the present invention. This fire extinguisher 1 is a modified version of the fire extinguisher 1 of the first embodiment described above, in which a control device 4 for controlling the discharge of the fire extinguishing agent, which was attached externally to the fire extinguishing agent storage container 2, is incorporated into the container valve 41. This regulator 43 has a pressure reduction function to reduce the pressure (primary pressure) of the nitrogen gas stored at high pressure in the fire extinguishing agent storage container 2 to a usable pressure (secondary pressure), a pressure regulating function to keep the secondary pressure constant, and a flow rate adjustment function to maintain a nearly constant flow rate of the fire extinguishing agent regardless of pressure changes in the fire extinguishing agent, thereby enabling stable fire extinguishing. Preferably, this container valve 41 has a pressure reduction function to reduce the pressure (primary pressure) of nitrogen gas stored at high pressure in the fire extinguishing agent storage container 2 to a usable pressure (secondary pressure), a pressure regulating function to keep the secondary pressure constant, and a flow rate adjustment function to maintain a substantially constant flow rate of the fire extinguishing agent regardless of pressure changes in the fire extinguishing agent, thereby enabling stable fire extinguishing. For example, the pressure-reducing container valve for gas-based fire extinguishing equipment previously proposed by the applicant (see Patent Document 3) can be suitably used. As a result, the regulator 43 of the fire extinguisher 1 is not exposed to the outside, eliminating any protrusions on the fire extinguisher 1, thereby improving operability and safety. In this case, the regulator 43 is configured to function in conjunction with the opening device 42, which is also incorporated into the container valve 41. Figure 6 shows a third embodiment of the fire extinguisher of the present invention. This fire extinguisher 1 is a modified version of the fire extinguisher 1 of the first embodiment described above, in which the control device 4 for controlling the discharge of the fire extinguishing agent, which was attached externally to the fire extinguishing agent storage container 2, is housed and installed inside the fire extinguishing agent storage container 2. The regulator 43 has a pressure reduction function to reduce the pressure (primary pressure) of the nitrogen gas stored at high pressure in the fire extinguishing agent storage container 2 to a usable pressure (secondary pressure), a pressure regulating function to keep the secondary pressure constant, and a flow rate adjustment function to maintain a nearly constant flow rate of the fire extinguishing agent regardless of pressure changes in the fire extinguishing agent, thereby enabling stable fire extinguishing. As a result, the regulator 43 of the fire extinguisher 1 is not exposed to the outside, eliminating any protrusions on the fire extinguisher 1, thereby improving operability and safety. In addition, the center of gravity of the fire extinguisher 1 is lowered, improving stability when installed upright. In this case, the regulator 43 is incorporated into the container valve 41 and stored inside the fire extinguishing agent storage container 2, and is configured to function in conjunction with the opening device 42, which is also incorporated into the container valve 41. Furthermore, the container valve 41 incorporates a safety device 44 equipped with a sealing plate 44a for releasing nitrogen gas in the event of an abnormal increase in the pressure of nitrogen gas stored in the fire extinguishing agent storage container 2. The opening device 42 incorporated into the container valve 41 comprises a sealing plate 42b attached via a sealing member 42c by a cap nut 42a that screws onto the container valve 41, and an on / off valve 42d. The on / off valve 42d is biased in a direction that closes the gas flow path leading to the tip opening 41a of the container valve 41 by a spring member 42e whose rear end is supported by the cap nut 42a. Furthermore, the on / off valve 42d is configured such that the pressure of the nitrogen gas stored in the fire extinguishing agent storage container 2 within the valve chamber 42f is applied to its back. As a result, when the fire extinguisher 1 is placed in storage, the on / off valve 42d closes the gas flow path leading to the tip opening 41a of the container valve 41, thereby maintaining the storage state of the nitrogen gas stored at high pressure in the fire extinguishing agent storage container 2. On the other hand, when using the fire extinguisher 1, the pressure inside the valve chamber 42f is reduced by breaking the sealing plate 42b, which disrupts the pressure balance of the nitrogen gas applied to the shut-off valve 42d. This causes the shut-off valve 42d to move against the biasing force of the spring member 42e, opening the gas passage leading to the tip opening 41a of the container valve 41, and releasing nitrogen gas. The regulator 43 consists of a constant flow valve in which a valve body 43b is movably arranged in the nitrogen gas flow path 43a, thereby changing the cross-sectional area of ​​the flow path opening 43d formed along the direction of movement of the valve body 43b of the valve body support 43c fixed to the container valve 41. Here, the pressure-receiving area of ​​the upstream-facing surface of the valve body 43b, which is subjected to the static pressure of nitrogen gas before depressurization due to the change in the cross-sectional area of ​​the flow path opening 43d, is made equal to the pressure-receiving area of ​​the downstream-facing surface (for this reason, the gas pressure chamber 43e formed inside the valve body 43b and the nitrogen gas flow path 43a are connected by a passage 43f formed in the valve body 43b). Furthermore, by eliminating the upstream-facing surface and the downstream-facing surface of the valve body 43b, which is subjected to the static pressure of nitrogen gas after depressurization, the force due to the static pressure of nitrogen gas acting on the valve body 43b in the direction of movement is balanced. In addition, by balancing the force acting on the valve body 43b due to the flow of nitrogen gas with the biasing force of the spring member 43g that biases the valve body 43b in a direction that balances this force, the cross-sectional area of ​​the flow path opening 43d formed along the direction of movement of the valve body 43b on the valve body support 43c is changed, and the flow rate of nitrogen gas is kept constant regardless of the change in nitrogen gas pressure. With this constant flow valve regulator 43, the valve body 43b, which is arranged in the nitrogen gas flow path 43a, is operated and balanced by the force acting on the valve body 43b due to the flow of nitrogen gas and the biasing force of the spring member 43g. This changes the cross-sectional area of ​​the flow path opening 43d formed along the direction of movement of the valve body 43b, thereby maintaining a substantially constant flow rate of nitrogen gas regardless of changes in nitrogen gas pressure. This makes the system less susceptible to pressure changes in nitrogen gas and also allows it to handle large flow rates. Furthermore, by using a spring member 43g as a biasing means to bias the valve body 43b in a direction that balances the force acting on the valve body 43b (a magnet can also be used as the biasing means), the overall structure can be simplified, and the regulator 43 can be stored and installed inside the fire extinguishing agent storage container 2. Furthermore, since the regulator 43 functions in conjunction with the release device 42 incorporated into the container valve 41, the mechanism and operation of the control device 4, which controls the release of the fire extinguishing agent including the regulator 43 and the release device 41, can be simplified and its reliability can be improved. Figure 7 shows a modified example of the third embodiment of the fire extinguisher of the present invention. This fire extinguisher 1 is a modification of the fire extinguisher 1 of the above-described third embodiment, in which the release device 42 incorporated in the container valve 41 is changed. The container valve 41 includes a handle 42g, an operation valve 42h that is operated by the handle 42g against the biasing force of a spring member 42e, an operation rod 42j provided integrally with the operation valve 42h, and an on-off valve 42d. The on-off valve 42d is biased by the spring member 42e in a direction to close the gas flow path following the tip opening 41a of the container valve 41. Then, by forming passages 42k and 42m in the operation rod 42j and the on-off valve 42d, the pressure on the tip opening 41a side of the container valve 41 is applied into the valve chamber 42f. Thereby, when the fire extinguisher 1 is in the storage state, the gas flow path following the tip opening 41a of the container valve 41 is closed by the on-off valve 42d, and the storage state of the nitrogen gas stored in the fire extinguishing agent storage container 2 at high pressure can be maintained. On the other hand, when using the fire extinguisher 1, by operating the handle 42g, the on-off valve 42d is moved via the operation valve 42h and the operation rod 42j, whereby the gas flow path following the tip opening 41a of the container valve 41 is opened and nitrogen gas is released. Here, even if the operation of the handle 42g is released, the moving state of the on-off valve 42d is maintained due to the pressure balance of the nitrogen gas applied to the on-off valve 42d. In addition, other configurations and operations including the regulator 43 of this embodiment are the same as those of the fire extinguisher 1 of the above-described third embodiment. FIG. 8 shows a modification of the third embodiment of the fire extinguisher of the present invention. This fire extinguisher 1 is provided with a protector 51 that protects the portion of the fire extinguishing agent storage container 2 of the fire extinguisher 1 exposed to the outside, a fixing band 52, a shoulder strap 53, and a radial direction indicator 54 as holding members on the fire extinguishing agent storage container 2. Thereby, the operability and safety of the fire extinguisher 1 can be further enhanced. FIG. 9 shows a fourth embodiment of the fire extinguisher of the present invention. This fire extinguisher 1 is configured such that a nozzle portion 3 is connected to a fire extinguishing agent storage container 2 as a fire extinguishing agent supply means via a flexible hose 6, and the fire extinguishing agent storage container 2 is fixedly arranged. Similar to the fire extinguisher 1 of the first embodiment, nitrogen gas is stored in the fire extinguishing agent storage container 2, and a metal porous member 31 is arranged at the outlet portion of the flow path of the fire extinguishing agent formed in the nozzle portion 3. Here, the hose 6 is wound around a hose reel 61 with a required length and pulled out for use. An open / close operation valve 34 is arranged at the holding portion 33 of the nozzle portion 3 so that the release and stop of nitrogen gas can be operated by hand. Thereby, a semi-fixed fire extinguisher suitable for initial large-capacity fire extinguishing can be provided. Next, the specifications of a specific example of this fire extinguisher 1 will be described. Weight of the nozzle portion (including the holding portion of the nozzle and the hose): Approximately 15 kg Filling pressure of nitrogen gas: Approximately 30 MPa Continuous discharge time of nitrogen gas: Approximately 30 seconds (per fire extinguishing agent storage container) Distance to the fire target: Within 2 m Figures 10 to 11 show a fifth embodiment of the fire extinguisher of the present invention. This fire extinguisher 1 is configured such that the nozzle portion 3A is formed as an aggregate of a plurality of nozzle portions 3 of the fire extinguisher 1 of the first embodiment. Thereby, the range for maintaining the fire extinguishing agent concentration necessary for extinguishing the fire extinguishing agent radiated toward the fire target can be set large. In this case, since the weight of the nozzle portion 3A is large, an arbitrary power assist mechanism for reducing the load during operation can be adopted. Also, as in a modified example of the fifth embodiment of the fire extinguisher of the present invention shown in FIG. 12, a metal porous member 35 can be arranged at the outlet portion of the fire extinguishing agent of the nozzle portion 3A configured as an aggregate of a plurality of nozzle portions 3 so as to cover the outlet portions of all the nozzle portions 3. Thereby, the nitrogen gas discharged from each nozzle portion 3 can be made uniform by the metal porous member 35 and radiated toward the fire target. In this embodiment, a space 36 is formed between the nozzle portion 3 and the porous metal member 35. However, it is also possible to arrange the nozzle portion 3 and the porous metal member 35 in contact with each other without providing a space 36. Incidentally, the present invention aims to provide a portable or semi-fixed fire extinguisher suitable for initial fire suppression in a relatively narrow area. However, by using the nozzle portion 3 of the fire extinguisher 1 of the present invention, it is also possible to provide a fixed local fire suppression system suitable for initial fire suppression targeting a specific fire W or a relatively narrow area, as shown in Figure 11 (first reference example) and Figure 12 (second reference example). Here, a device 42 that uses a constant-pressure gas source 42n for starting (see Patent Document 4) can be suitably used as the opening device 42. Although the fire extinguisher of the present invention has been described above based on several embodiments, the present invention is not limited to the configuration described in the above embodiments. The configuration can be modified as appropriate without departing from the spirit of the invention, such as by appropriately adopting known technologies or appropriately combining the configurations described in each embodiment, as shown in (1) to (3) below. (1) As a fire extinguishing agent, in addition to nitrogen gas, which is a typical inert gas, various inert gases can be used, such as argon other than nitrogen gas, or mixtures of multiple types of inert gases including nitrogen gas. Furthermore, the fire extinguishing agent can be stored in a fire extinguishing agent storage container in gaseous or liquid form (compared to gas, the storage ratio of the fire extinguishing agent to the container volume can be increased. In this case, a container suitable for storing liquefied gas should be used for the fire extinguishing agent storage container). Furthermore, in addition to inert gas, a halon substitute fire extinguishing agent that is not subject to halon regulations (for example, HFC-227ea) can also be used as a fire extinguishing agent. (2) As fire extinguishing agent storage containers, in addition to seamless steel containers made of chromium molybdenum, manganese, stainless steel, etc., which are commonly used, and aluminum containers, titanium containers that combine lightness and strength, and composite containers in which the liner material of the high-pressure gas container body, which is made of aluminum, plastic, stainless steel, etc., is reinforced with FRP made of glass fiber plastic or carbon fiber plastic, etc. may be used. (3) As a means of supplying the fire extinguishing agent, in addition to a fire extinguishing agent storage container, a nitrogen generator disclosed in Japanese Patent Publication No. 10-263109 and Japanese Patent Publication No. 2007-222534, or a gas generator using a gas generating agent disclosed in Japanese Patent Publication No. 2001-346898 can be used. The present invention provides a portable or semi-fixed fire extinguisher suitable for initial fire suppression, which uses an inert gas or the like as an extinguishing agent that is not restricted in terms of the target of the fire or the method of use due to the toxicity of the extinguishing agent to the human body, and makes it easy to maintain the necessary concentration of the extinguishing agent to suppress the fire, thereby providing an effective fire suppression effect. Therefore, it can be used for initial fire suppression in various types of facilities, including facilities where electrical and electronic equipment such as computers, communication equipment, data centers, and electrical equipment is installed. 1 Fire extinguisher 2. Fire extinguishing agent storage container (fire extinguishing agent supply means) 3. Nozzle section 3A Nozzle section (assembly of nozzle sections) 30 Nozzle body 31. Porous metal members 32 Orifice Plate 32a Orifice 33 Holding part 34. Open / Close Operation Valve 35. Porous metal components 4. Control devices 41. Container valve 42 Opening device 43 Adjuster 43a Flow channel 43b Valve body 43c Valve support 43d Flow channel opening 43e Gas pressure chamber 43F Corridor 43g spring component 44 Safety device 51 Protector 52 Fixing band 53. Shoulder strap 54 Radial direction indicator 6. Hose 61 Hose Reel

Claims

------05 / 03 / 2019------(OCR) Page 1 of 1 page Claims 1. Fire extinguishers, together with at least a nozzle section made movable to release the fire extinguishing agent to the object being extinguished, are characterized as fire extinguishing agents previously referred to; a gaseous agent is supplied from the fire extinguishing agent supply route, and at the outlet of the fire extinguishing agent flow route formed in the nozzle section previously referred to, a perforated metal assembly is fitted.

2. Fire extinguishers described in Claim 1 are characterized in that the fire extinguishing agent supply route previously referred to includes an agent retention container to which the nozzle section is rigidly connected, and the fire extinguishing agent retention container is made movable. 3.Fire extinguishers described in Reputation 1 are characterized in that the fire extinguishing agent supply path previously referred to consists of an agent retention container to which the nozzle is connected via a rubber hose and the fire extinguishing agent container is fixed in place.

4. Fire extinguishers described in Reputation 1, 2 or 3 are characterized in that in the fire extinguishing agent flow path from the fire extinguishing agent supply path previously referred to to the nozzle, an adjuster is supplied with a pressure reducing function and / or flow control function.

5. Fire extinguishers described in Reputation 1, 2, 3 or 4 are characterized in that the opening diameter of the nozzle previously referred to is set to 50 mm or greater. 6.Fire extinguishers described in any one of Reputation 1, 2, 3, 4, or 5 are characterized in that the nozzle section previously referred to consists of a sum of various nozzle sections.

7. Fire extinguishers described in Reputation 1, 2, 3, 4, 5, or 6 are characterized in that the agent for extinguishing the previously referred to gas fires, predominantly inert gases, is used.------------Page 1 of 1 page Reputation 1. Fire extinguishers with at least one movable nozzle section to release the extinguishing agent toward the object to be extinguished are characterized in that when the gaseous extinguishing agent previously referred to is delivered from the extinguishing agent delivery path and at the outlet of the extinguishing agent flow path formed in the nozzle section, a perforated metal assembly is installed.2.The fire extinguisher described in Claim 1 is characterized in that the preceding supply route consists of a storage container, to which the nozzle is rigidly connected, and the fire extinguishing agent container is movable.

3. The fire extinguisher described in Claim 1 is characterized in that the preceding supply route consists of a storage container, to which the nozzle is connected by a flexible hose, and the fire extinguishing agent container is fixed in place.

4. The fire extinguisher described in Claim 1, 2, or 3 is characterized in that in the flow path of the fire extinguishing agent from the preceding supply route to the nozzle, an adjuster fitted with a pressure reducing and / or flow control function is provided. 5.The fire extinguisher described in claims 1, 2, 3, or 4 is characterized in that the opening diameter of the previously mentioned nozzle section is set to 50 millimeters or greater.

6. The fire extinguisher described in claims 1, 2, 3, 4, or 5 is characterized in that the previously mentioned nozzle section consists of a group of multiple nozzle sections.

7. The fire extinguisher described in claims 1, 2, 3, 4, 5, or 6 is characterized in that when the previously mentioned fire extinguishing agent, a gaseous fire extinguishing agent, predominantly consisting of inert gases, is used;