Perfluorohexanone and nitrogen combined fire extinguishing device

Abstract

The utility model discloses a perfluorohexanone and nitrogen combined fire extinguishing device which comprises a nitrogen cylinder, an outer pressure storage cylinder group, a perfluorohexanone fire extinguishing agent, a mixing component, a pipeline and a spray head, and nitrogen is stored in the nitrogen cylinder; the outer pressure storage bottle set comprises a steel bottle used for containing a perfluorohexanone fire extinguishing agent and nitrogen. The mixing part is arranged in the steel cylinder and consists of a siphon, one end of the siphon is connected with a container valve arranged at the top of the steel cylinder, the other end of the siphon extends into the bottom of the steel cylinder, and a functional hole is formed in the siphon; the nitrogen cylinder is connected with a gas inlet component of the outer pressure storage cylinder group through a collecting pipe; an outlet of the container valve is connected with the spray head through a pipeline; the nitrogen and the perfluorohexanone fire extinguishing agent are mixed through the mixing component, output through an outlet of the container valve and then conveyed to the spray head to be sprayed through the same pipeline.

Description

Technical Field

[0001] The utility model belongs to the field of fire emergency rescue, in particular to a fire extinguishing device combining perfluorohexanone and nitrogen. Background Art

[0002] Due to the disadvantage of high greenhouse effect potential (GWP) of hydrofluorocarbons (HFCs) perfluorohexanone fire extinguishing agents, under the new situation of "carbon peak and carbon neutrality", high greenhouse effect hydrofluorocarbon perfluorohexanone fire extinguishing agents are facing gradual restrictions or even elimination. The research and development of alternative technologies for hydrofluorocarbon gas fire extinguishing agents has become one of the major challenges facing the current fire protection field.

[0003] A new generation of alternative hydrofluorocarbon gas fire extinguishing agents should offer fire extinguishing efficiency comparable to that of HFC-227ea, be environmentally friendly, produce few highly corrosive byproducts, and exhibit excellent full-flood dispersibility. Currently, only perfluorohexanone (PFH) has received approval from the US Environmental Protection Agency (EPA) and has been included in its Important New Alternatives policy. It has begun gradual engineering applications and is recognized by scientists worldwide as one of the most promising alternative technologies. However, perfluorohexanone's high boiling point and difficulty in vaporizing result in poor release and diffusion, insufficient full-flood fire extinguishing capabilities, and issues such as low-concentration combustion during fire extinguishing and the high concentration of highly corrosive gaseous products produced during decomposition. These issues have become technical bottlenecks currently limiting the engineering application of perfluorohexanone. While relevant research has been conducted both domestically and internationally in recent years, no effective solution has been found, severely hindering the engineering application of new perfluorohexanone fire extinguishing agents.

[0004] Gas-liquid two-phase flow technology involves the impact and mixing of gas and liquid within a pipeline. After release through a nozzle, the shear force of the gas and the bursting of bubbles free the liquid from viscosity and surface tension, resulting in a double atomization and vaporization effect. This significantly improves the release and diffusion performance of the liquid and provides greater mist momentum. The synergistic and diluting effects of the inert gas can reduce the production of corrosive gaseous products at the fire scene, providing a viable technical path for improving the firefighting effectiveness of perfluorohexanone and reducing the production of highly corrosive gaseous products during the firefighting process. Therefore, the gas-liquid two-phase flow technology of perfluorohexanone and nitrogen is proposed to address the technical bottlenecks that limit the engineering application of perfluorohexanone. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the prior art (only transportation without mixing) and provide a fire extinguishing device for combining perfluorohexanone and nitrogen, which can achieve rapid fire extinguishing and is of great significance to emergency fire rescue in an environmentally friendly manner.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A perfluorohexanone and nitrogen combined fire extinguishing device, comprising a nitrogen cylinder, an external pressure storage cylinder assembly, a perfluorohexanone fire extinguishing agent, a mixing component, a pipeline, and a nozzle. The nitrogen cylinder stores nitrogen; the external pressure storage cylinder assembly includes a steel cylinder for containing the perfluorohexanone fire extinguishing agent and nitrogen; the mixing component is disposed inside the steel cylinder and comprises a siphon tube, one end of the siphon tube is connected to a container valve disposed on the top of the steel cylinder, and the other end extends into the bottom of the steel cylinder. The siphon tube is provided with a functional hole.

[0008] The nitrogen cylinder is connected to the air inlet component of the external pressure storage cylinder group through a manifold, and the outlet of the container valve is connected to the nozzle through a pipeline;

[0009] The nitrogen and the perfluorohexanone fire extinguishing agent are mixed by a mixing component, output through an outlet of a container valve, and then transported to a nozzle through the same pipeline for spraying.

[0010] Furthermore, the perfluorohexanone fire extinguishing agent is transported by air drive, and the air drive is to transport the perfluorohexanone fire extinguishing agent in the external storage pressure bottle group to the mixing component through a siphon tube through the nitrogen in the nitrogen cylinder; the air intake component is arranged on the top of the steel cylinder of the external storage pressure bottle group, and the air intake component includes a pressure reducing device or an air intake joint, and the pressure reducing device includes a pressure reducing valve or a pressure reducing orifice plate.

[0011] Furthermore, the perfluorohexanone fire extinguishing agent and nitrogen are pressed into the siphon from the cylinder, and the perfluorohexanone fire extinguishing agent and nitrogen begin to mix at the functional hole of the siphon to form a gas-liquid two-phase flow and are output through the container valve outlet.

[0012] Furthermore, the functional hole of the siphon tube is a single hole or a structure of multiple holes, and the area of ​​each hole is within the range of 2mm 2 ~2000mm 2 .

[0013] Furthermore, the boiling point of the perfluorohexanone fire extinguishing agent is 49.2°C.

[0014] Furthermore, the nitrogen cylinder is composed of a single cylinder or a plurality of nitrogen cylinders. When the gas source is composed of a plurality of nitrogen cylinders, a collecting pipe is used to converge the nitrogen released from each nitrogen cylinder.

[0015] Furthermore, after the cylinders in the external storage pressure bottle group are filled with perfluorohexanone fire extinguishing agent, nitrogen is filled to 0.5MPa~1.0MPa, which realizes the sealing of the perfluorohexanone external storage pressure bottle group; the perfluorohexanone fire extinguishing agent is driven by nitrogen and input into the siphon tube. After mixing with nitrogen in the siphon tube, the high-flow gas and the low-flow liquid collide with each other in the siphon tube. The perfluorohexanone fire extinguishing agent is first broken into liquid film and liquid droplets under the action of gas to form a gas-liquid two-phase flow, realizing one-time breaking; nitrogen and The volume ratio of perfluorohexanone fire extinguishing agent under standard conditions is 1:1 to 10000:1; after the perfluorohexanone fire extinguishing agent is broken down once in the siphon, nitrogen is used as a carrier gas to form a gas-liquid two-phase flow and output through the outlet of the container valve, and then mixed transportation is realized in the pipeline, and the pipeline transportation length range is 1m to 300m; the gas-liquid two-phase flow is sprayed at the nozzle at the end of the pipeline to form a droplet particle size of at least 1μm, realizing secondary breakage of the perfluorohexanone fire extinguishing agent and realizing spraying after atomization.

[0016] Compared with the prior art, the beneficial effects brought about by the technical solution of the utility model are:

[0017] 1. Wide applicability: This device can be used for full flooding fire extinguishing in confined spaces and semi-open spaces, as well as for local fire extinguishing in open spaces, with a wide range of application scenarios.

[0018] 2. Multifunctional Nitrogen Utilization: Nitrogen has multiple uses in this device. It not only serves as the driving gas for the perfluorohexanone fire extinguishing agent, but is also used for container valve sealing, pressurization, agent fragmentation and atomization, and as a carrier gas for pipeline transportation. This multifunctional use of nitrogen not only improves gas utilization efficiency but also effectively reduces perfluorohexanone fire extinguishing agent usage, lowering economic costs and improving fire extinguishing effectiveness.

[0019] 3. High-efficiency fire extinguishing and environmental protection: Perfluorohexanone fire extinguishing agent is atomized by nitrogen drive and gas-liquid two-phase flow technology, and the droplet size can be as small as 1μm, which greatly improves the surface area and heat absorption capacity of the fire extinguishing agent, enhances the fire extinguishing effect, and reduces the amount of fire extinguishing agent used, lowers the fire extinguishing concentration, and effectively reduces the generation of toxic by-products, meeting environmental protection requirements.

[0020] 4. Improved Safety: This device effectively addresses the risks associated with storing perfluorohexanone fire extinguishing agents under both unpressurized and pressurized conditions, ensuring the safe operation of the fire extinguishing system. Furthermore, mixing perfluorohexanone fire extinguishing agents with nitrogen significantly suppresses their combustion-supporting properties at low concentrations, improving fire extinguishing safety.

[0021] 5. Easy to modify: This technical solution can be directly applied to existing gas fire extinguishing systems (such as HFC-227ea system). Only the bottle group needs to be replaced, and there is no need to modify the existing pipelines and nozzles. It is simple to operate and easy to implement.

[0022] 6. Suitable for occupied areas: This fire extinguishing system maintains an oxygen concentration above 16% during the extinguishing process, ensuring adequate breathing and safe escape for personnel. Furthermore, the system produces low noise levels during extinguishing, making it environmentally friendly and suitable for use in sensitive areas.

[0023] 7. Rapid and effective fire extinguishing: Driven by the high flow rate of nitrogen, the perfluorohexanone fire extinguishing agent can be quickly and evenly distributed in the protected space after atomization. In local fire extinguishing, it can quickly reach the fire extinguishing concentration, overcome the fire plume, and enable the fire extinguishing agent to effectively cover the surface of the fire source, thereby improving the fire extinguishing efficiency and significantly shortening the fire extinguishing time.

[0024] These beneficial effects can comprehensively improve the performance and applicability of the fire extinguishing system, providing a more efficient, safe and environmentally friendly solution for fire emergency rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1a and Figure 1b Schematic diagrams of gas-driven internal mixing fire extinguishing devices in the case of multiple nitrogen cylinders and single nitrogen cylinder respectively;

[0026] Figure 2 Schematic diagram of the structure of an external storage pressure bottle group without mixing components as a control;

[0027] Figure 3 It is a schematic diagram of the structure of an external storage and pressure bottle group with internal mixing components;

[0028] Figure 4 This is a schematic diagram of the piping layout of the fire extinguishing system.

[0029] Reference numerals: 1-manifold; 2-nitrogen cylinder; 3-pressure reducing device; 4-pipeline; 5-spray nozzle; 6-external pressure storage cylinder group; 7-container valve; 8-air inlet component; 9-siphon; 10-steel cylinder; 11-functional hole; DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figures 1a to 3 As shown, this embodiment provides a fire extinguishing device for combining perfluorohexanone and nitrogen, which can utilize nitrogen and perfluorohexanone at the same time. By transporting and spraying the two at the same time, the long-distance transport, rapid atomization spraying and uniform distribution of spatial concentration of the perfluorohexanone fire extinguishing agent are implemented, thereby achieving fire extinguishing, explosion suppression and temperature reduction.

[0032] The fire extinguishing device includes a nitrogen cylinder 2, perfluorohexanone, a mixing component (siphon 9), a pressure reducing device 3, a pipeline 4, and a nozzle 5. The gas source, i.e., the nitrogen provided by the nitrogen cylinder 2, is mixed with the perfluorohexanone fire extinguishing agent through the mixing component and then transported to the nozzle 5 through the same pipeline 4 for spraying; the mixing component is mainly the siphon 9.

[0033] After a certain amount of perfluorohexanone fire extinguishing agent is filled into the steel cylinder of the external pressure storage cylinder group 6 of the device as required, nitrogen is added into the steel cylinder to 0.5MPa~1.0MPa.

[0034] The nitrogen cylinder consists of a single cylinder or multiple cylinders. When the gas source consists of multiple nitrogen cylinders, a manifold 1 is used to converge the nitrogen released from each nitrogen cylinder. Figure 1a .

[0035] The mixing component is arranged in the cylinder of the external pressure storage cylinder group 6. The external pressure storage cylinder group 6 includes a cylinder 10 for containing perfluorohexanone fire extinguishing agent and nitrogen. The top of the cylinder 10 is provided with a container valve 7. The mixing component is arranged inside the cylinder 10. The mixing component consists of a siphon tube 9. One end of the siphon tube 9 is connected to the container valve 7, and the other end extends into the bottom of the cylinder 10. The siphon tube 9 is provided with a functional hole 11. Figure 3 .

[0036] The perfluorohexanone fire extinguishing agent is delivered via gas drive. Nitrogen from the nitrogen cylinder transports the perfluorohexanone fire extinguishing agent within the external pressure storage cylinder assembly 6 through a siphon 9 and a container valve 7 to the mixing element. The top of the steel cylinder 10 of the external pressure storage cylinder assembly 6 is also equipped with an air intake assembly 8. This intake assembly 8 includes a pressure reducing device and an air intake connector. The pressure reducing device includes a pressure reducing valve or a pressure reducing orifice plate. The gas is depressurized before entering the mixing element or the steel cylinder 10.

[0037] See Figure 3 , through the mixing component, the perfluorohexanone fire extinguishing agent and nitrogen are pressed from the cylinder 10 into the siphon 9, and the perfluorohexanone fire extinguishing agent and nitrogen begin to mix at the functional hole 11 of the siphon 9, forming a gas-liquid two-phase flow and output through the outlet of the container valve 7;

[0038] The functional hole 11 of the siphon tube 9 is a single hole or a multi-hole structure, and the area of ​​each hole is 2mm 2 ~2000mm 2 .

[0039] Specifically, this embodiment further provides a fire extinguishing method based on the above-mentioned fire extinguishing device, including:

[0040] (1) Nitrogen filling and sealing: After the perfluorohexanone fire extinguishing agent is filled, nitrogen is added to the bottle group to 0.5MPa~1.0MPa to achieve the sealing of the valve of the perfluorohexanone external storage pressure bottle group;

[0041] (2) Gas-liquid mixing at the starting end of the pipeline: The perfluorohexanone fire extinguishing agent is driven by nitrogen and input into the siphon. After mixing with nitrogen in the siphon, the high-flow gas and low-flow liquid collide with each other in the siphon. The perfluorohexanone fire extinguishing agent is first broken into liquid film and liquid droplets under the action of the gas to form a gas-liquid two-phase flow, achieving one-time breakage; the volume ratio of nitrogen and perfluorohexanone fire extinguishing agent at normal pressure is 1:1 to 10000:1;

[0042] (3) Mixed transportation in the same pipe: After the perfluorohexanone fire extinguishing agent is broken once in the siphon tube, nitrogen is used as a carrier gas to form a gas-liquid two-phase flow, and then it is transported to the nozzle 5 through the pipeline 4, realizing mixed transportation in the same pipe in the pipeline 4. Compared with a single liquid, it can effectively reduce the resistance loss caused by valves, pipelines and pipe fittings, and realize long-distance and rapid transportation of perfluorohexanone fire extinguishing agent, wherein the pipeline transportation length range is 1m to 300m.

[0043] (4) Nozzle atomization spraying: The gas-liquid two-phase flow is sprayed at the nozzle at the end of the pipeline. Due to the rapid ejection of the perfluorohexanone fire extinguishing agent and the rapid expansion of the gas, a smaller droplet size (minimum up to 1 μm) and a faster speed are obtained, that is, the secondary breakage of the perfluorohexanone fire extinguishing agent, achieving high-speed spraying after atomization.

[0044] Specifically, the fire extinguishing device and fire extinguishing method of this embodiment are based on the following principles:

[0045] 1. Sealing principle: Nitrogen is filled into the perfluorohexanone external storage pressure bottle group to 0.5MPa~1.0MPa. Nitrogen enters the uppermost cavity of the valve core of the container valve on the bottle group. Since the upper cavity area of ​​the valve core is much larger than the lower cavity area, the pressure on the upper end of the valve core is greater than the pressure on the lower end of the valve core. This pressure pushes the valve core downward, and finally the valve is closed and sealed.

[0046] 2. Gas-liquid two-phase flow mixing principle: Perfluorohexanone fire extinguishing agent is driven by nitrogen and input into the siphon. After mixing with the gas in the siphon, the high-flow gas and low-flow liquid collide with each other in the siphon. The perfluorohexanone fire extinguishing agent will first be broken into liquid film and large particle droplets under the action of nitrogen to form a gas-liquid two-phase mixed flow, achieving one-time breaking.

[0047] 3. Principle of mixed transportation in the same pipe: After the perfluorohexanone fire extinguishing agent is broken once at the initial end of the pipeline, nitrogen is used as a carrier gas to form a gas-liquid two-phase flow, realizing mixed transportation in the same pipe in the pipeline. Compared with a single liquid, it can effectively reduce the resistance loss caused by valves, pipelines and fittings, and realize the long-distance and rapid transportation of perfluorohexanone fire extinguishing agent.

[0048] 4. Principle of atomization spraying: Gas-liquid two-phase flow is sprayed at the nozzle at the end of the pipeline. Due to the rapid ejection of perfluorohexanone fire extinguishing agent and the rapid expansion of gas, smaller droplet size (micron level) and faster speed are obtained, that is, the secondary breakage of perfluorohexanone fire extinguishing agent, realizing high-speed spraying after atomization.

[0049] 5. Fire extinguishing principle: (1) The droplet size of the atomized perfluorohexanone fire extinguishing agent is small, which leads to a greatly increased surface area of ​​the same volume of perfluorohexanone fire extinguishing agent after atomization, a significant increase in heat absorption capacity, and a faster vaporization speed, achieving a significant cooling and gas fire extinguishing effect, thereby improving the fire extinguishing efficiency of the perfluorohexanone fire extinguishing agent, reducing the fire extinguishing concentration, reducing the amount of perfluorohexanone fire extinguishing agent used, and greatly reducing the toxic byproducts produced;

[0050] (2) In terms of full flooding fire extinguishing applications, the perfluorohexanone fire extinguishing agent droplets will achieve rapid full flooding distribution in the protected space along with the high-speed airflow. At the same time, the smaller droplets vaporize faster, ultimately achieving rapid full flooding fire extinguishing in the confined space.

[0051] (3) In terms of local fire extinguishing applications, the rapid spraying after atomization and the rapid vaporization of the droplets can achieve a rapid fire extinguishing concentration of the perfluorohexanone fire extinguishing agent in the local protection area. The simultaneous spraying of gas and liquid has a greater impact and can better overcome the fire plume, so that the atomized perfluorohexanone fire extinguishing agent can reach the surface of the protected object and achieve rapid fire extinguishing.

[0052] (4) Compared with the oxygen concentration of less than 16% required for inert gas fire extinguishing, the oxygen concentration during fire extinguishing is greater than 16%, which can be used in places with people and can meet the basic requirements of people's breathing and escape;

[0053] (5) Nitrogen and perfluorohexanone fire extinguishing agents act simultaneously to exert their fire extinguishing efficiency and extinguish the fire;

[0054] (6) It can be used for local fire extinguishing in open spaces or full flooding fire extinguishing in semi-open spaces. The principle is that the vaporized perfluorohexanone fire extinguishing agent and nitrogen form a mixed gas fire extinguishing agent, and the droplets of the unvaporized perfluorohexanone fire extinguishing agent after spraying are suspended in the air. On the one hand, it can isolate the oxygen in the external air from entering the protected space, achieving asphyxiation fire extinguishing. On the other hand, it can lock the dissipation of the mixed gas fire extinguishing agent in the open or semi-open space, ensuring that the concentration of the mixed gas fire extinguishing agent in the protected space can be maintained at a high level for a long time, thereby achieving fire extinguishing.

[0055] (7) The fire extinguishing concentration of perfluorohexanone fire extinguishing agent will change under different oxygen concentrations. For example, when the oxygen concentration decreases, the fire extinguishing concentration of perfluorohexanone fire extinguishing agent will also decrease, thereby improving the fire extinguishing efficiency of perfluorohexanone fire extinguishing agent and reducing the amount of perfluorohexanone fire extinguishing agent used;

[0056] (8) Some perfluorohexanone fire extinguishing agents have the property of supporting combustion at low concentrations, but when mixed with nitrogen for fire extinguishing, this property can be significantly suppressed.

[0057] 6. The mixing principle is as follows:

[0058] Refer to Figure 3 A schematic structural diagram of the mixing components of the external storage pressure bottle group shown;

[0059] ① The perfluorohexanone fire extinguishing agent is pressed into the siphon tube 9 from the cylinder 10 by nitrogen;

[0060] ② Since the inner diameter of the cylinder 10 is much larger than that of the siphon tube 9, the flow rate of the perfluorohexanone fire extinguishing agent inside the siphon tube 9 is much greater than the pressure inside the cylinder 10. According to Bernoulli's principle, at the functional hole 11 of the siphon tube 9, the static pressure inside the siphon tube 9 is lower than the static pressure outside the siphon tube (i.e., the pressure inside the cylinder). Due to this pressure difference, nitrogen enters the siphon tube 9 from the gas phase space in the cylinder through the functional hole 11;

[0061] ③ The perfluorohexanone fire extinguishing agent and nitrogen begin to mix at the functional hole 11, forming a gas-liquid two-phase flow and output through the outlet of the container valve 7.

[0062] Fire extinguishing example, fire extinguishing space is 100m 3 , with dimensions of 4.7m×4.7m×4.5m (length×width×height). Perfluorohexanone (boiling point is 49.2℃) is stored in an external pressure storage bottle group; the gas is nitrogen, which is stored in a nitrogen bottle. The mixing structure adopts internal mixing, and the connection diagram is as follows Figure 1b The piping layout of the fire extinguishing device is shown in Figure 4 As shown, the pipeline transmission length ranges from 1m to 300m.

[0063] The parameters of the nitrogen cylinder group are 13.5MPa, 1 bottle.

[0064] The parameters of the perfluorohexanone external storage pressure bottle group are 70L, 1 bottle.

[0065] Perfluorohexanone, 60kg.

[0066] Fire extinguishing results: Meets the total flooding fire extinguishing requirements of GB 25972-2010 and the Class A and Class B fire extinguishing requirements of GB 16670-2006, with an extinguishing concentration of 4.3%. Specific results are shown in Table 1.

[0067] Table 1 Fire extinguishing parameters

[0068]

[0069] In summary, when the nitrogen and perfluorohexanone fire extinguishing agents of the fire extinguishing device of the present invention are mixed to extinguish a fire: the droplet size of the atomized perfluorohexanone fire extinguishing agent is small, resulting in a greatly increased surface area of ​​the same volume of atomized perfluorohexanone fire extinguishing agent, a significant increase in heat absorption capacity, a faster vaporization speed, and a significant cooling and gas fire extinguishing effect, thereby improving the fire extinguishing efficiency of the perfluorohexanone fire extinguishing agent, reducing the fire extinguishing concentration, and reducing the amount of perfluorohexanone fire extinguishing agent used; in the application of full flooding fire extinguishing, the perfluorohexanone fire extinguishing agent droplets will achieve rapid full flooding and uniform distribution in the protected space with the high-speed airflow; in the application of local fire extinguishing, the rapid spraying after atomization and the rapid vaporization of the droplets will achieve a rapid full flooding and uniform distribution in the protected space ..., thereby reducing the fire extinguishing concentration, and reducing the fire extinguishing concentration, and reducing the fire extinguishing concentration, and reducing the fire extinguishing concentration, The oxygen concentration of the atomized perfluorohexanone fire extinguishing agent is less than 16%, while the oxygen concentration of the atomized perfluorohexanone fire extinguishing agent is less than 16%, which can be used in places with people and meet the basic requirements of human breathing and escape. Some perfluorohexanone fire extinguishing agents have the characteristic of supporting combustion at low concentrations, and spraying them with nitrogen for fire extinguishing can significantly inhibit this characteristic. At the same time, it can also significantly reduce the fire extinguishing time, reduce the fire extinguishing concentration, and reduce the generation of toxic byproducts such as HF.

[0070] The present invention is not limited to the embodiments described above. The above description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention. The above specific embodiments are merely illustrative and not restrictive. Without departing from the scope of protection of the present invention and the scope of the claims, those skilled in the art may make various specific modifications based on the teachings of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A fire extinguishing device using perfluorohexanone and nitrogen, characterized in that: It includes a nitrogen cylinder, an external pressure storage cylinder group, a perfluorohexanone fire extinguishing agent, a mixing component, a pipeline, and a nozzle. The nitrogen cylinder stores nitrogen; the external pressure storage cylinder group includes a steel cylinder for containing the perfluorohexanone fire extinguishing agent and nitrogen; the mixing component is arranged inside the steel cylinder and consists of a siphon tube, one end of the siphon tube is connected to the container valve arranged on the top of the steel cylinder, and the other end extends into the bottom of the steel cylinder, and the siphon tube is provided with a functional hole; The nitrogen cylinder is connected to the air inlet component of the external pressure storage cylinder group through a manifold, and the outlet of the container valve is connected to the nozzle through a pipeline; The nitrogen and the perfluorohexanone fire extinguishing agent are mixed by a mixing component, output through an outlet of a container valve, and then transported to a nozzle through the same pipeline for spraying.

2. A perfluorohexanone and nitrogen combined fire extinguishing device according to claim 1, characterized in that: The perfluorohexanone fire extinguishing agent is transported by air drive, which uses the nitrogen in the nitrogen cylinder to transport the perfluorohexanone fire extinguishing agent in the external storage pressure bottle group to the mixing component through a siphon; the air intake component is arranged on the top of the steel cylinder of the external storage pressure bottle group, and the air intake component includes a pressure reducing device or an air intake joint, and the pressure reducing device includes a pressure reducing valve or a pressure reducing orifice plate.

3. A perfluorohexanone and nitrogen combined fire extinguishing device according to claim 1, characterized in that: The functional hole of the siphon is a single hole or a structure of multiple holes, and the area of ​​each hole is 2mm 2 ~2000mm 2 .

4. A perfluorohexanone and nitrogen combined fire extinguishing device according to claim 1, characterized in that: The nitrogen cylinder consists of a single cylinder or several nitrogen cylinders. When the gas source consists of several nitrogen cylinders, a collecting pipe is used to converge the nitrogen released from each nitrogen cylinder.

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