Airborne gas fire extinguishing system and fire extinguishing method

Abstract

The invention discloses an airborne gas fire extinguishing system and a fire extinguishing method, and belongs to the field of fire extinguishing technology, the system comprises a driving gas storage device, the driving gas outlet of the driving gas storage device is connected with the input port of a graded gas supply device through a gas conveying pipeline, and the graded gas supply device is connected with the driving gas storage device; a plurality of output ports of the graded gas supply device are respectively connected with a driving gas inlet of the fire extinguishing agent storage device, a driving gas inlet of the double-fluid atomization device and a fire extinguishing agent output pipeline connected with the fire extinguishing agent storage device through gas pipelines; the fire extinguishing agent storage device is used for storing a high-boiling-point gas fire extinguishing agent in a liquid state, and a fire extinguishing agent output port of the fire extinguishing agent storage device is connected with a fire extinguishing agent input port of the double-fluid atomization device through the fire extinguishing agent output pipeline. By means of the system and the related fire extinguishing method, the problems that in the cabin environment, the high-boiling-point fire extinguishing agent is poor in atomization effect, low in diffusion speed and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire extinguishing and fire fighting, and more particularly to an airborne gas fire extinguishing system and a fire extinguishing method. Background Art

[0002] At present, the existing airborne gas fire extinguishing agents are mainly low-boiling point halon fire extinguishing agents (halon 1211 and halon 1301), which have the advantages of fast gasification speed and high fire extinguishing efficiency. However, this type of fire extinguishing agent has a high ozone depletion potential (ODP) and faces the risk of being banned. According to existing studies, high-boiling point chemical gas fire extinguishing agents (gas fire extinguishing agents that are liquid at normal temperature and pressure), such as perfluorohexanone (boiling point 48°C) and 2-bromotrifluoropropylene (boiling point 30°C), are one of the most promising halon fire extinguishing agent substitutes in the future. However, due to the high boiling point of this type of fire extinguishing agent, if the original halon fire extinguisher system is used directly, under extreme conditions, especially in the low temperature environment of aircraft air transportation, there are problems such as poor atomization effect, slow diffusion of the fire extinguishing agent, and inability to quickly reach an effective fire extinguishing concentration in the entire cabin.

[0003] Therefore, it is necessary to develop a new type of airborne gas fire extinguishing system based on the characteristics of high-boiling point gas fire extinguishing agents to solve the above problems. Summary of the invention

[0004] In view of this, the present invention provides an airborne gas fire extinguishing system and a fire extinguishing method, which are used to solve the problems of poor atomization effect of high boiling point fire extinguishing agent and slow diffusion speed of fire extinguishing agent.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] The present invention firstly discloses an airborne gas fire extinguishing system, comprising: a driving gas storage device, wherein the driving gas outlet of the driving gas storage device is connected to the input port of a graded gas supply device through a gas transmission pipeline, and a plurality of output ports of the graded gas supply device are respectively connected to the driving gas inlet of a fire extinguishing agent storage device, the driving gas inlet of a dual-fluid atomizing device and a fire extinguishing agent output pipeline connected to the fire extinguishing agent storage device through a gas transmission pipeline, the fire extinguishing agent storage device is used to store a high-boiling-point gas fire extinguishing agent in a liquid state, and the fire extinguishing agent output port of the fire extinguishing agent storage device is connected to the fire extinguishing agent input port of the dual-fluid atomizing device through a fire extinguishing agent output pipeline.

[0007] Preferably, in the above-mentioned airborne gas fire extinguishing system, the driving gas storage device is used to store the driving gas, including any one of nitrogen, carbon dioxide, and argon, or a composite gas composed of any two or more of nitrogen, carbon dioxide, and argon.

[0008] Preferably, in the above-mentioned airborne gas fire extinguishing system, the boiling point of the high-boiling-point gas fire extinguishing agent stored in the fire extinguishing agent storage device is greater than or equal to 20°C.

[0009] Preferably, in the above-mentioned airborne gas fire extinguishing system, the dual-fluid atomization device includes a bubble atomizer, a jet atomizer, a whistle atomizer, a dual-fluid impact atomizer, an external mixing airflow atomizer, an internal mixing airflow atomizer, an internal and external mixing combined airflow atomizer, a Y-type airflow atomizer or a two-phase flow centrifugal atomizer.

[0010] Preferably, in the above-mentioned airborne gas fire extinguishing system, a one-way valve is provided on the gas supply pipeline connecting the graded gas supply device and the fire extinguishing agent output pipeline, and on the fire extinguishing agent output pipeline. The one-way valve provided on the fire extinguishing agent output pipeline is located between the fire extinguishing agent storage device and the connecting port between the gas supply pipeline and the fire extinguishing agent output pipeline.

[0011] Preferably, in the above-mentioned airborne gas fire extinguishing system, a plurality of the dual-fluid atomizing devices are provided.

[0012] Preferably, in the above-mentioned airborne gas fire extinguishing system, solenoid valves are provided on the driving gas outlet of the driving gas storage device and the fire extinguishing agent output pipeline connected to the fire extinguishing agent output port of the fire extinguishing agent storage device.

[0013] Preferably, the above-mentioned airborne gas fire extinguishing system also includes a fire detection device, which is used to monitor the fire signal in the cabin and is simultaneously connected to the solenoid valve arranged at the driving gas outlet of the driving gas storage device and the solenoid valve on the fire extinguishing agent output pipeline.

[0014] Preferably, in the above-mentioned airborne gas fire extinguishing system, a gas flow control device is provided on the gas pipeline between the driving gas storage device and the staged gas supply device.

[0015] Preferably, the above-mentioned airborne gas fire extinguishing system also includes a fire extinguishing agent concentration monitoring device, which is used to monitor the concentration of the fire extinguishing agent released by the dual-fluid atomization device in the cabin and is connected to the gas flow control device through a data line.

[0016] The present invention also discloses an airborne gas fire extinguishing method, comprising the following steps:

[0017] When a fire signal in the aircraft cabin is detected, the solenoid valves on the fire extinguishing agent storage device and the driving gas storage device are opened simultaneously;

[0018] The driving gas in the driving gas storage device enters the fire extinguishing agent storage device, the fire extinguishing agent output pipeline and the dual-fluid atomizing device respectively through the graded gas supply device, wherein the driving gas entering the fire extinguishing agent storage device is used to drive the high-boiling-point gas fire extinguishing agent in a liquid state stored in the fire extinguishing agent storage device to enter the dual-fluid atomizing device through the fire extinguishing agent output pipeline; the driving gas entering the fire extinguishing agent output pipeline is used to pre-crush the high-boiling-point gas fire extinguishing agent in a liquid state in the fire extinguishing agent output pipeline; the driving gas entering the dual-fluid atomizing device is used to completely crush the high-boiling-point gas fire extinguishing agent in a liquid state and complete atomization;

[0019] After the atomization is completed, the high-boiling-point gas fire extinguishing agent is released into the interior of the aircraft cabin where the fire is ignited through the injection outlet of the dual-fluid atomizing device.

[0020] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses an airborne gas fire extinguishing system and a fire extinguishing method, which have the following beneficial effects:

[0021] (1) The present invention can solve the problem that high boiling point fire extinguishing agents have poor atomization effect under low temperature conditions;

[0022] (2) The present invention can significantly increase the flow rate of fire extinguishing agent through the graded air supply device, thereby solving the defect of limiting the flow rate of fire extinguishing agent when using a dual-fluid atomizing device alone.

[0023] (3) Conventional airborne gas fire extinguishing systems usually include two sets of fire extinguishing agent storage bottles, namely a high-speed bottle and a low-speed bottle, which are used for the purpose of quickly releasing the fire extinguishing agent and maintaining the concentration of the fire extinguishing agent in the cabin respectively. The present invention can achieve the above purpose through a gas flow control device, thereby reducing the complexity of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the overall structure of the airborne gas fire extinguishing system provided by the present invention.

[0026] Figure 2 This is an enlarged structural schematic diagram of the fire extinguishing agent storage device provided by the present invention.

[0027] In the figure, 1-driving gas storage device; 2-fire extinguishing agent storage device; 3-solenoid valve; 4-gas flow control device; 5-graded gas supply device; 6-dual fluid atomization device; 7-fire extinguishing agent output pipeline; 8-driving gas transportation pipeline; 9-check valve; 10-driving gas inlet of fire extinguishing agent storage device; 11-fire extinguishing agent outlet of fire extinguishing agent through siphon; 12-fire extinguishing agent through siphon. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The embodiment of the present invention first discloses an airborne gas fire extinguishing system, such as Figure 1 As shown, the airborne gas fire extinguishing system includes a driving gas storage device 1, a driving gas outlet of the driving gas storage device 1 is connected to the input port of the graded gas supply device 5 through a gas pipeline, the graded gas supply device 5 has a plurality of output ports which are respectively connected to the driving gas inlet of the fire extinguishing agent storage device 2, the driving gas inlet of the dual-fluid atomizing device 6 and the fire extinguishing agent output pipeline 7 connected to the fire extinguishing agent storage device 2 through the gas pipeline, the fire extinguishing agent storage device 2 is used to store the high-boiling point gas fire extinguishing agent in a liquid state, and the fire extinguishing agent output port of the fire extinguishing agent storage device 2 is connected to the fire extinguishing agent input port of the dual-fluid atomizing device 6 through the fire extinguishing agent output pipeline 7.

[0030] like Figure 2 As shown, a driving gas outputted by the graded gas supply device 5 enters the fire extinguishing agent storage device 2 through the driving gas inlet 10 on the fire extinguishing agent storage device 2, and drives the fire extinguishing agent in a liquid state to enter the fire extinguishing agent output pipeline from the outlet 11 through the siphon 12.

[0031] In the embodiment of the present invention, in addition to providing power for the transportation of gas fire extinguishing agent in a liquid state, the graded gas supply device 5 can also be injected at different positions of the fire extinguishing agent output pipeline 7 to enhance energy input in different regions (the continuously moving gas fire extinguishing agent in a liquid state at different positions in the fire extinguishing agent output pipeline 7 is pre-crushed to form a discontinuous liquid, thereby increasing the flow rate of the fire extinguishing agent). On the basis of ensuring the atomization effect of the fire extinguishing agent, the flow rate of the fire extinguishing agent is increased, thereby solving the defect of limiting the flow rate of the fire extinguishing agent when using a dual-fluid atomization device alone.

[0032] In order to prevent the fire extinguishing agent in the fire extinguishing agent output pipeline 7 from backtracking, a one-way valve 9 is provided on the gas supply pipeline connecting the graded gas supply device 5 and the fire extinguishing agent output pipeline 7 .

[0033] It is worth noting that the graded gas supply device 5 can adjust the pressure of the driving gas entering the fire extinguishing agent storage device 2 and the fire extinguishing agent transport pipeline 7 to ensure that the pressure entering the fire extinguishing agent storage device 2 is greater than the pressure entering the pipeline. For this purpose, a one-way valve 9 is also provided on the fire extinguishing agent output pipeline. The one-way valve is located between the fire extinguishing agent storage device 2 and the connecting port between the gas pipeline and the fire extinguishing agent output pipeline, and only allows the gas to move in the direction of the arrow shown in the figure.

[0034] Furthermore, in the embodiment of the present invention, the driving gas storage device 1 is used to store gaseous driving gas. The driving gas storage device itself can be a pressure-resistant storage tank, in which the stored driving gas can be a composite gas of one or more components of nitrogen, carbon dioxide, and argon. The amount of gas in the driving gas storage device 1 is more than 1.1 times the amount required to release all the gas fire extinguishing agent in the gas fire extinguishing agent storage device 1.

[0035] Furthermore, in the embodiment of the present invention, the fire extinguishing agent storage device 2 is used to store high-boiling-point gas fire extinguishing agent in a liquid state. The fire extinguishing agent storage device itself can be a pressure-resistant storage tank, wherein the high-boiling-point gas fire extinguishing agent referred to in this application refers to a gas fire extinguishing agent with a boiling point higher than 20°C, including perfluorohexanone, 2-bromotrifluoropropylene and other halogenated hydrocarbon fire extinguishing agents, etc.

[0036] Furthermore, in an embodiment of the present invention, a dual-fluid atomization device is provided with a gas fire extinguishing agent inlet, a driving gas inlet and an atomization release outlet, and its specific type can be at least one of a bubble atomizer, a jet atomizer, a whistle atomizer, a dual-fluid impact atomizer, an external mixing airflow atomizer, an internal mixing airflow atomizer, an internal and external mixing combined airflow atomizer, a Y-type airflow atomizer and a two-phase flow centrifugal atomizer.

[0037] It is worth noting that the dual-fluid atomization device mainly plays an efficient atomization role for high-boiling point fire extinguishing agents. Its main principle is that the high-speed driving gas transfers kinetic energy to the high-boiling point fire extinguishing agent, forming strong shear force, impact force and turbulent disturbance. The high-boiling point fire extinguishing agent is stretched into a thin liquid film or fine liquid filament, and then breaks into tiny droplets due to surface tension instability (completely breaking up the high-boiling point fire extinguishing agent in the liquid state), and finally forms an atomized spray composed of uniform fine droplets. Compared with single-fluid atomization that relies on high-pressure liquid injection (such as pressure nozzles), the advantage of dual-fluid atomization is that it requires lower liquid pressure, the droplet size is smaller and evenly distributed (usually up to 10-100 microns), and it can handle high-boiling point and high-viscosity liquids. In addition, the number of dual-fluid atomization devices can be set according to the size of the cabin space.

[0038] In the embodiment of the present invention, a solenoid valve 3 is provided on the connecting pipeline of the driving gas outlet of the driving gas storage device 1 and the fire extinguishing agent output port of the fire extinguishing agent storage device 2 .

[0039] In the above embodiment, a fire detection device is also provided, which is used to monitor the fire signal in the cabin and is simultaneously connected to the solenoid valve provided at the driving gas outlet of the driving gas storage device 1 and the solenoid valve provided on the fire extinguishing agent output port pipeline of the fire extinguishing agent storage device 2.

[0040] Furthermore, in the embodiment of the present invention, a gas flow control device 4 is provided on the gas pipeline between the driving gas storage device 1 and the graded gas supply device 5, and the gas flow control device 4 is used to control the total flow of the driving gas.

[0041] Furthermore, a gas flow control device 4 is also provided on the driving gas output pipeline between the graded gas supply device 5 and the fire extinguishing agent storage device 2 , and the gas flow control device can control the flow rate entering the fire extinguishing agent storage device 2 .

[0042] Furthermore, the present invention is also provided with a fire extinguishing agent concentration monitoring device, which can measure the concentration of the fire extinguishing agent released in the cabin in real time, and the fire extinguishing agent concentration monitoring device is connected to the gas flow control device 4 via a data line.

[0043] It is worth noting that the gas flow control device can control the release of the fire extinguishing agent at the maximum flow rate in the initial stage of the fire extinguishing agent release, so as to achieve the fire extinguishing concentration in the cabin at the fastest speed. Then, the gas flow control device can adjust the gas flow according to the signal of the fire extinguishing agent concentration monitoring device to further adjust the gas fire extinguishing agent flow rate to ensure that the fire extinguishing agent in the cabin maintains a sufficient fire extinguishing concentration during the entire fire extinguishing process.

[0044] Specifically, the fire detection device may be at least one of a smoke fire detector, a temperature fire detector, and an infrared fire detector.

[0045] It is worth noting that the driving gas can not only provide power for the transportation of the gas fire extinguishing agent, but also produce shear atomization effect with the gas fire extinguishing agent in the dual-fluid atomization device.

[0046] On the other hand, the embodiment further discloses an airborne gas fire extinguishing method, which can be implemented with the aid of the airborne gas fire extinguishing system disclosed in the present application, comprising the following steps:

[0047] When a fire signal in the aircraft cabin is detected, the solenoid valves on the fire extinguishing agent storage device and the driving gas storage device are opened simultaneously;

[0048] The driving gas in the driving gas storage device enters the fire extinguishing agent storage device, the fire extinguishing agent output pipeline and the dual-fluid atomizing device respectively through the graded gas supply device, wherein the driving gas entering the fire extinguishing agent storage device is used to drive the high-boiling-point gas fire extinguishing agent in a liquid state stored in the fire extinguishing agent storage device to enter the dual-fluid atomizing device through the fire extinguishing agent output pipeline; the driving gas entering the fire extinguishing agent output pipeline is used to pre-crush the high-boiling-point gas fire extinguishing agent in a liquid state in the fire extinguishing agent output pipeline; the driving gas entering the dual-fluid atomizing device is used to completely crush the high-boiling-point gas fire extinguishing agent in a liquid state and complete atomization;

[0049] After the atomization is completed, the high-boiling-point gas fire extinguishing agent is released into the interior of the aircraft cabin where the fire is ignited through the injection outlet of the dual-fluid atomizing device.

[0050] A more complete implementation step includes:

[0051] 1) The fire detection device detects the fire signal and transmits it to the gas fire extinguishing agent storage device and the driving gas storage device;

[0052] 2) The solenoid valves on the fire extinguishing agent storage device and the driving gas storage device are opened, the driving gas in the driving gas storage device is controlled by the gas flow control device, and then enters the fire extinguishing agent storage device, the fire extinguishing agent delivery pipeline and the dual-fluid atomization device respectively through the graded gas supply device and the gas delivery pipeline;

[0053] 3) The gaseous fire extinguishing agent, driven by the driving gas, enters the dual-fluid atomizing device through the fire extinguishing agent transport pipeline, and completes the atomization of the gaseous fire extinguishing agent with the driving gas under the action of the atomizing device and is released into the cabin;

[0054] 4) The fire extinguishing agent concentration monitoring device transmits the fire extinguishing agent concentration signal in the cabin to the gas flow control device, and the gas flow control device adjusts the total flow of the driving gas according to the preset fire extinguishing agent concentration to further adjust the gas fire extinguishing agent flow to maintain the concentration level of the fire extinguishing agent in the cabin.

[0055] The present application is further described below through a specific embodiment.

[0056] refer to Figure 1In a specific embodiment, the airborne gas fire extinguishing system includes: a driving gas storage device 1, a gas fire extinguishing agent storage device 2, a solenoid valve 3, a gas flow control device 4, a graded gas supply device 5, 5 dual-fluid atomizing devices 6, a fire extinguishing agent delivery pipeline 7, a driving gas delivery pipeline 8, and a one-way valve 9. More specifically, the driving gas storage device 1 is a nitrogen driving bottle with a capacity of 30 liters and a pressure of 6MPa; the gas fire extinguishing agent storage device 2 is a fire extinguishing agent bottle with a capacity of 30 liters and 26kg of perfluorohexanone; the dual-fluid atomizing device 6 is an internal mixing airflow atomizer; in addition, the airborne gas fire extinguishing system is also equipped with 3 smoke fire detectors and 2 fire extinguishing agent concentration monitoring devices in the aircraft cabin.

[0057] The preset gas fire extinguishing agent concentration of the onboard gas fire extinguishing system is 12% (the volume concentration of the gas fire extinguishing agent in the cabin environment).

[0058] The operation process of the airborne gas fire extinguishing system is as follows:

[0059] When one of the three fire detection devices detects a fire signal, an alarm signal is issued and transmitted to the fire extinguishing agent storage device 2 and the driving gas storage device 1; the solenoid valves 3 on the gas fire extinguishing agent storage device 2 and the driving gas storage device 1 are opened, and the nitrogen controls the flow through the gas flow control device 4, and then enters the gas fire extinguishing agent storage device 2, the fire extinguishing agent delivery pipeline 7 and the dual-fluid atomization device 6 respectively through the graded gas supply device 5 and the driving gas delivery pipeline (gas delivery pipeline) 8; perfluorohexanone, driven by nitrogen, enters the dual-fluid atomization device 6 through the fire extinguishing agent delivery pipeline 7, and quickly completes the atomization of perfluorohexanone with nitrogen under the action of the atomization device and releases it into the cabin environment to reach a preset concentration (12%); the fire extinguishing agent concentration monitoring device transmits the perfluorohexanone concentration signal in the cabin to the gas flow control device 4, and the gas flow control device adjusts the flow of the driving gas according to the preset perfluorohexanone concentration to further adjust the perfluorohexanone flow to maintain the concentration level of the fire extinguishing agent in the cabin.

[0060] In order to verify the effect of the present invention, the inventors conducted the following experiments:

[0061] The above-mentioned airborne gas fire extinguishing system was installed in a simulated test cabin of an aircraft cargo hold with a volume of 30 cubic meters (length, width and height: 5 meters * 3 meters * 2 meters). The ambient temperature in the cargo hold was controlled to -30℃ and maintained for 3 hours, and a 5B level oil basin fire was ignited. The test results showed that after the smoke fire detector detected the fire signal, the fire extinguishing system was triggered to extinguish the fire. The fire extinguishing concentration in the cargo hold was reached within 3 seconds and the fire was extinguished. The fire extinguishing concentration was then maintained for 2 hours.

[0062] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0063] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An airborne gas fire extinguishing system, characterized in that: include: A driving gas storage device (1), wherein the driving gas outlet of the driving gas storage device (1) is connected to the input port of a graded gas supply device (5) via a gas pipeline, and the multiple output ports of the graded gas supply device (5) are respectively connected to the driving gas inlet of a fire extinguishing agent storage device (2), the driving gas inlet of a dual-fluid atomizing device (6), and a fire extinguishing agent output pipeline (7) connected to the fire extinguishing agent storage device (2) via gas pipelines; the fire extinguishing agent storage device (2) is used to store a high-boiling-point gas fire extinguishing agent in a liquid state, and the fire extinguishing agent output port of the fire extinguishing agent storage device (2) is connected to the fire extinguishing agent input port of the dual-fluid atomizing device (6) via the fire extinguishing agent output pipeline (7).

2. According to the airborne gas fire extinguishing system of claim 1, the driving gas storage device (1) is used to store the driving gas, including any one of nitrogen, carbon dioxide, and argon, or a composite gas composed of any two or more of nitrogen, carbon dioxide, and argon.

3. An airborne gas fire extinguishing system according to claim 1, characterized in that: The boiling point of the high-boiling-point gas fire extinguishing agent stored in the fire extinguishing agent storage device (2) is greater than or equal to 20°C.

4. An airborne gas fire extinguishing system according to claim 1, characterized in that: The dual-fluid atomizing device (6) includes a bubble atomizer, a jet atomizer, a whistle atomizer, a dual-fluid impact atomizer, an external mixing airflow atomizer, an internal mixing airflow atomizer, an internal and external mixing combined airflow atomizer, a Y-shaped airflow atomizer or a two-phase flow centrifugal atomizer.

5. An airborne gas fire extinguishing system according to claim 1, characterized in that: A one-way valve (9) is provided on the gas pipeline connecting the graded gas supply device (5) and the fire extinguishing agent output pipeline (7), and on the fire extinguishing agent output pipeline (7). The one-way valve (9) provided on the fire extinguishing agent output pipeline is located between the fire extinguishing agent storage device (2) and the connection port between the gas pipeline and the fire extinguishing agent output pipeline.

6. An airborne gas fire extinguishing system according to claim 1, characterized in that: A solenoid valve (3) is provided on the fire extinguishing agent output pipeline connected to the fire extinguishing agent output port of the fire extinguishing agent storage device (2) and the driving gas outlet of the driving gas storage device (1).

7. An airborne gas fire extinguishing system according to claim 6, characterized in that: It also comprises a fire detection device, which is used to monitor the fire signal in the cabin and is connected to the solenoid valve arranged at the driving gas outlet of the driving gas storage device (1) and the solenoid valve on the fire extinguishing agent output pipeline.

8. An airborne gas fire extinguishing system according to claim 1, characterized in that: A gas flow control device (4) is provided on the gas pipeline between the driving gas storage device (1) and the graded gas supply device (5).

9. An airborne gas fire extinguishing system according to claim 8, characterized in that: It also includes a fire extinguishing agent concentration monitoring device, which is used to monitor the concentration of the fire extinguishing agent released by the dual-fluid atomizing device in the cabin and is connected to the gas flow control device (4) through a data line.

10. An airborne gas fire extinguishing method, characterized in that: The following steps are involved: When a fire signal in the aircraft cabin is detected, the solenoid valves on the fire extinguishing agent storage device and the driving gas storage device are opened simultaneously; The driving gas in the driving gas storage device enters the fire extinguishing agent storage device, the fire extinguishing agent output pipeline and the dual-fluid atomizing device respectively through the graded gas supply device, wherein the driving gas entering the fire extinguishing agent storage device is used to drive the high-boiling-point gas fire extinguishing agent in a liquid state stored in the fire extinguishing agent storage device to enter the dual-fluid atomizing device through the fire extinguishing agent output pipeline; the driving gas entering the fire extinguishing agent output pipeline is used to pre-crush the high-boiling-point gas fire extinguishing agent in a liquid state in the fire extinguishing agent output pipeline; the driving gas entering the dual-fluid atomizing device is used to completely crush the high-boiling-point gas fire extinguishing agent in a liquid state and complete atomization; After the atomization is completed, the high-boiling-point gas fire extinguishing agent is released into the interior of the aircraft cabin where the fire is ignited through the injection outlet of the dual-fluid atomizing device.

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