Cross oscillating fire extinguishant nozzle and method

Abstract

The application relates to the technical field of aviation equipment, and discloses a cross oscillation type fire extinguishing agent nozzle and method, which comprises a shell; the shell comprises an outlet end, a spraying cavity and an inlet end which are sequentially connected; the outlet end comprises a cross-shaped outlet, and an induction assembly is arranged on the periphery of the outlet; the spraying cavity is integrally formed with a first oscillating body and a second oscillating body inside, the first oscillating body and the second oscillating body cross each other and are correspondingly communicated with the cross direction of the outlet; a flow control assembly is arranged on the inlet end, the flow control assembly is connected with the first oscillating body and the second oscillating body respectively and is used for controlling the flow size of the first oscillating body and the second oscillating body respectively. The application automatically detects the fluid concentration in the region, thereby actively adjusting the spraying direction and the spraying concentration, effectively improving the effective concentration of the fire extinguishing agent in the region, accurately controlling the spraying dose of the fire extinguishing agent in each direction, ensuring the spraying accuracy and the fire extinguishing efficiency, and reducing the waste of the fire extinguishing agent.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, specifically to a cross-oscillation type fire extinguishing agent nozzle and method. Background Technology

[0002] Aircraft fire suppression systems are designed to effectively detect, extinguish, and control fires in their initial stages within the cabin. When a detector detects a fire in the cabin, the fire suppression subsystem injects a gaseous extinguishing agent through nozzles into the cabin space to suppress the fire. To achieve optimal fire suppression, the extinguishing agent must be distributed in a specific volume fraction and for a certain duration within the space after injection.

[0003] However, due to the aircraft's structural design, the cabin contains many narrow and hidden areas, such as the area between the passenger cabin and the skin. With existing nozzles, the diffusion rate of the extinguishing agent is slow, making it difficult to reach these confined spaces, let alone guarantee the required volume fraction or duration within them. This makes it difficult to suppress fires in certain areas of the aircraft cabin in a timely manner, or even to extinguish them at all. To improve extinguishing effectiveness, the number of spray points and the spray concentration must be increased. However, large-scale spraying reduces the spray pressure, leading to uneven distribution of the extinguishing agent within the space and significant waste of the agent.

[0004] To address this issue, this solution proposes a cross-oscillating type fire extinguishing agent nozzle and method to achieve effective spraying of concealed areas inside the cabin and precise control of the spray volume, thereby reducing the problem of fire extinguishing agent waste. Summary of the Invention

[0005] The present invention aims to provide a cross-oscillating type fire extinguishing agent nozzle and method to increase the spraying area in hidden areas inside the cabin, improve spraying accuracy, reduce the problem of fire extinguishing agent waste, and enable the fire extinguishing agent nozzle to automatically adjust the spray according to the fluid concentration in the fire extinguishing area, thereby improving fire extinguishing efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: applied to an aircraft fire protection system, comprising a housing; the housing includes an outlet end, a spray chamber, and an inlet end connected in sequence; the outlet end includes a cross-shaped outlet, and a sensing component is provided around the outlet, the sensing component being used to identify the fluid concentration outside the outlet; the spray chamber has a first oscillator and a second oscillator integrally formed inside, the first oscillator and the second oscillator intersecting at a cross and corresponding to the cross direction of the outlet; the inlet end is provided with a flow control component, the flow control component being connected to the first oscillator and the second oscillator respectively, for controlling the flow rate of the first oscillator and the second oscillator respectively.

[0007] The principle and advantages of this scheme are: When extinguishing fires inside aircraft, to ensure effectiveness, the spray range or concentration is often increased, assuming that a large enough spray range and high enough concentration will achieve rapid fire suppression and cover even concealed areas of the aircraft. However, in actual firefighting operations, the fact that existing outlets are passive spray systems is often overlooked. Spraying is only conducted over a large area with fixed range, angle, and concentration. During large-scale spraying, pressure and accuracy decrease, leading to uneven distribution of the extinguishing agent. Consequently, even with a high overall concentration, the concentration in concealed areas may be insufficient to extinguish the fire, resulting in ineffective suppression and significant waste of extinguishing agent.

[0008] This solution first employs two intersecting oscillating chambers, using a dual-fluid oscillation exciter to achieve active, periodic oscillating spraying in four directions: up, down, left, and right. This expands the fixed spray area without requiring an additional directional controller, achieving the effect of spray direction adjustment to meet the fire extinguishing needs of aircraft hiding areas, increasing the extinguishing agent diffusion rate, and enabling the extinguishing agent to quickly and effectively cover the fire area while reducing the amount of extinguishing agent used.

[0009] Meanwhile, a sensing component is installed at the exit to automatically identify the concentration of extinguishing agent in the area. Based on the actual situation of the fire area, the flow control component precisely adjusts the flow field in the oscillation chamber to effectively control the cross oscillation pattern, thereby achieving oscillation spray in all directions or in the vertical or horizontal directions. This allows for precise control of the spray amount, improving the utilization rate of extinguishing agent, increasing fire extinguishing efficiency, and reducing the amount of extinguishing agent used.

[0010] Preferably, as an improvement, the first oscillator includes a first coupling cavity and a first feedback channel; the second oscillator includes a second coupling cavity and a second feedback channel; wherein the central axes of the first coupling cavity and the second coupling cavity overlap and intersect perpendicularly to form a coupling cavity; the first feedback channel and the second feedback channel are perpendicular to each other and are respectively located in the X-axis direction and Y-axis direction of a cross shape.

[0011] Preferably, as an improvement, the first feedback channel includes a first reflux channel and a second reflux channel disposed opposite to each other on both sides of the first coupling cavity; the second feedback channel includes a third reflux channel and a fourth reflux channel disposed on both sides of the second coupling cavity; the upper ends of the first reflux channel, the second reflux channel, the third reflux channel and the fourth reflux channel are respectively connected to the bottom of the outlet, and the lower ends are respectively connected to the bottom of the coupling cavity, and correspondingly form the first reflux channel port, the second reflux channel port, the third reflux channel port and the fourth reflux channel port.

[0012] Preferably, as an improvement, the flow control component includes an X-axis control valve and a Y-axis control valve; the X-axis control valve is used to control and regulate the fluid volume in the first feedback channel located in the X-axis direction; the Y-axis control valve is used to control and regulate the fluid volume in the second feedback channel located in the Y-axis direction. This ensures that the flow rate in the symmetrical channels on both sides remains consistent, ensures the flow rate uniformity in the first and second feedback channels, ensures the effectiveness of the active oscillation, and can satisfy the uniform periodic oscillating jet in four directions.

[0013] Preferably, as an improvement, the inlet end is provided with a cross-shaped conical inlet, which is connected to the cross-shaped outlet; the X-axis control valve is located in the X-axis direction of the conical inlet, and the Y-axis control valve is located in the Y-axis direction of the conical inlet. This makes the fluid control of the X and Y axes more precise.

[0014] Preferably, as an improvement, the outlet has an inverted conical structure, with the upper port of the outlet having a length of 10-13mm and the lower port having a diameter of 4-6mm at the intersection with the upper port. This ensures that the extinguishing agent can quickly and stably enter the coupling chamber, forming an active periodic oscillating spray, while avoiding blockage that would affect its use, and effectively controlling the dosage to prevent waste.

[0015] A fire extinguishing method using a cross-oscillating extinguishing agent nozzle is provided. The method involves adjusting the nozzle's spray area direction based on the fire situation determined inside the cabin. During the spraying process, the fluid concentration in the current spray area is automatically sensed by a sensing component at the front end of the outlet. The current fluid concentration is compared with a preset concentration, and the spraying direction and concentration at the outlet end are adjusted based on the comparison result.

[0016] Preferably, as an improvement, the spray direction includes both the X-axis and Y-axis; the spray flow rate includes 0%-100%. This improves controllability and allows for separate flow intensity control of the spray oscillation in both directions, thereby increasing the utilization rate of the extinguishing agent and avoiding waste.

[0017] Preferably, as an improvement, the preset concentration is the effective concentration for fluid fire extinguishing. When the concentration is higher than the preset concentration, spraying in that direction is stopped; when the concentration is lower than the preset concentration, a secondary spraying is performed on the area. Targeted secondary spraying improves fire extinguishing efficiency while reducing the amount of fluid used.

[0018] Preferably, as an improvement, the spray concentration is controlled and adjusted by a flow control component; when the concentration is lower than 50% of the preset concentration, a second spray is performed at the maximum spray concentration; when the concentration is higher than 50% of the preset concentration, spraying is performed at 50% of the maximum concentration. This precise control of the extinguishing agent dosage improves the utilization rate of the extinguishing agent, allows for more accurate control of the spray volume, and effectively enhances fire extinguishing efficiency.

[0019] This solution automatically detects the fluid concentration within a given area, enabling a more accurate understanding of the spatial distribution of the sprayed extinguishing agent. This allows for proactive adjustments to the spray direction and concentration, effectively increasing the effective concentration and uniformity of the extinguishing agent within the area. Simultaneously, it precisely controls the dosage of extinguishing agent in each direction, ensuring spray accuracy and extinguishing efficiency while minimizing agent waste. Furthermore, the periodic oscillating spray along the X and Y axes effectively increases the spray area, covering hidden areas, reducing the need for additional adjustment devices, simplifying the outlet structure, facilitating spraying operations, increasing the initiative of outlet spraying, improving spray coverage, and enhancing extinguishing efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the cross-oscillation type fire extinguishing agent nozzle in state one of the embodiments of the present invention; Figure 2 This is a schematic diagram of the cross-oscillation type fire extinguishing agent nozzle in state two of Embodiment 1 of the present invention; Figure 3 This is a front view of the cross-oscillation type fire extinguishing agent nozzle in Embodiment 1 of the present invention; Figure 4 for Figure 3 Schematic diagram of the mid-section EE; Figure 5 for Figure 3 Schematic diagram of the structure of section AA; Figure 6 This is a flowchart illustrating the method of using the extinguishing agent nozzle in Embodiment 2 of the present invention. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: housing 1, outlet end 2, spray chamber 3, inlet end 4, outlet 21, sensing component 22, first oscillator 31, second oscillator 32, first return channel 301, second return channel 302, third return channel 303, fourth return channel 304, coupling chamber 305, first return channel port 51, second return channel port 52, third return channel port 53, fourth return channel port 54, inlet 41, X-axis control valve 42, and Y-axis control valve 43.

[0022] Example 1 like Figure 1As shown, a cross-oscillating extinguishing agent nozzle is applied to an aircraft fire protection system. Targeting concealed areas of the aircraft, it automatically adjusts the spray direction and concentration based on the concentration of the extinguishing agent fluid within the fire area to improve fire extinguishing efficiency in concealed areas while reducing extinguishing agent usage and waste. Specifically, it includes a cylindrical housing 1, comprising an integrally formed outlet end 2, a spray chamber 3, and an inlet end 4. The diameter of the outlet end 2 is smaller than the diameter of the spray chamber 3, and the diameter of the inlet end 4 is smaller than the diameter of the outlet end 2.

[0023] For details, see attached. Figure 2 The outlet end 2 shown includes a through-type outlet 21. The upper end of outlet 21 has a cross-shaped structure, and the lower end converges into a square structure, making the outlet 21 an inverted cone shape. In this embodiment, the cross-shaped structure at the upper end of outlet 21 is formed by two rectangular openings that intersect vertically, with a length of 12mm and a width of 5mm. The width of the converging lower square opening is the same as the width of the upper rectangular opening, which is 5mm. Simultaneously, a sensing component 22 is installed on outlet end 2. The sensing component 22 is a gas sensing device installed on the outside of outlet 21 to identify the concentration of the sprayed extinguishing agent. This allows for automatic identification of the fluid concentration within the area and automatic adjustment based on the concentration, while also reducing the number of sensing devices and simplifying the structure. In this embodiment, a conventional gas sensor can be used as the gas sensing device. Through the aircraft fire suppression control system connected to the nozzle, the concentration in the nozzle spray area is sensed and analyzed, achieving real-time sensing and testing.

[0024] A spray cavity 3 is integrally formed at the lower end of the outlet end 2, and the spray cavity 3 is connected to the outlet 21. The connection between the outlet end 2 and the spray cavity 3 is set with a rounded corner with a radius r of 0.85mm. The rounded corner is more conducive to the flow of internal fluid and avoids obstruction or blockage.

[0025] Specifically, the spray cavity 3 has a first oscillator 31 and a second oscillator 32 integrally formed inside. The first oscillator 31 and the second oscillator 32 are arranged in a cross shape within the spray cavity 3, with their cross direction corresponding to the cross direction of the outlet 21, so as to control the direction of fluid injection and avoid causing cross-contamination. See attached... Figure 3 and attached Figure 4 As shown in the cross-sectional view, the first oscillator 31 includes a first coupling cavity and a first feedback channel located on both sides of the first coupling cavity. The first feedback channel includes a first return channel 301 and a second return channel 302. The second oscillator 32 includes a second coupling cavity and a second feedback channel located on both sides of the second coupling cavity. The second feedback channel includes a third return channel 303 and a fourth return channel 304.

[0026] The first and second coupling cavities have their central axes aligned and intersecting perpendicularly to form a cross shape, constituting coupling cavity 305. The upper end of coupling cavity 305 is connected to outlet 21. The first return channel 301 and the second return channel 302 are respectively located in the X-axis direction of coupling cavity 305, and the third return channel 303 and the fourth return channel 304 are respectively located in the Y-axis direction of coupling cavity 305, thus forming a cross structure. At the same time, the upper ends of the first return channel 301, the second return channel 302, the third return channel 303, and the fourth return channel 304 converge and connect to outlet 21, and the lower ends converge and connect to the bottom of coupling cavity 305, and also connect to the lower inlet end 4, respectively forming the first return channel port 51, the second return channel port 52, the third return channel port 53, and the fourth return channel port 54 facing the four directions of up, down, left, and right.

[0027] In this embodiment, combined with the appendix Figure 5 As shown, both the first and second feedback channels are cuboid structures with a cross-sectional width of 5mm to ensure smooth fluid flow and reduce blockages. This allows the fluid to form a self-excited oscillation structure, enabling the extinguishing agent to automatically oscillate periodically at the corresponding outlet when sprayed, forming an active periodic spray. This, in turn, combines two fluids that oscillate up and down or left and right (up and down and left and right directions are relative), while avoiding excessive fluid volume that is difficult to control and adjust.

[0028] For details, see attached. Figure 1 To be continued Figure 5 As shown, an inlet end 4 is integrally formed at the lower end of the spray chamber 3, as shown in the attached diagram. Figure 5 As shown, the inlet end 4 has an overall conical structure. An inlet 41 communicating with the coupling cavity 305 is provided inside the inlet end 4, so that the central axes of the outlet 21, the coupling cavity 305, and the inlet 41 are on the same straight line. In this embodiment, the inlet 41 is a cross-shaped conical inlet, with its cross direction corresponding to the cross direction of the outlet 21, thereby allowing the fluid to enter the oscillation cavity uniformly and be periodically oscillating and jetted through the oscillation cavity, thus forming periodic oscillating jets in four directions: up, down, left, and right.

[0029] A flow control component is installed on the inlet end 4. The flow control component is connected to the first return channel port 51, the second return channel port 52, the third return channel port 53 and the fourth return channel port 54 respectively. It is used to control the output concentration of the extinguishing agent fluid at each fluid port, thereby controlling the oscillation flow rate of the first oscillator and the second oscillator respectively.

[0030] In this embodiment, the flow control component consists of flow control valves installed at the first return channel port 51, the second return channel port 52, the third return channel port 53, and the fourth return channel port 54, respectively. The control valves at the first and second return channel ports 51 and 52 form a group, namely an X-axis control valve 42, used to control the fluid flow in the first feedback channel of the first oscillator located in the X-axis direction. The control valves at the third and fourth return channel ports 53 and 54 form a group, namely a Y-axis control valve 43, used to control the fluid concentration in the second feedback channel of the second oscillator located in the Y-axis direction, ensuring that the flow rates in the symmetrical channels on both sides remain consistent and guaranteeing the uniformity of the periodic oscillation. The flow control valves are electrically connected to the sensing component 22. The sensing component 22 detects the fluid concentration in the front-end region and adjusts the opening and closing of the flow control valves based on the feedback information, thereby achieving periodic adjustment of the X-axis and Y-axis directions and the jet flow rate from 0% to 100%.

[0031] Meanwhile, in this embodiment, the inlet end 4 is provided with connecting threads, which makes it easy for the nozzle to be adapted and installed with existing fire extinguishing agent delivery pipelines.

[0032] This design employs two intersecting oscillators to achieve periodic oscillating spray of the extinguishing agent at outlet 21 in four directions: up, down, left, and right. This expands the spray area, meeting the spraying needs of more concealed areas. It allows for automatic, periodic oscillation of the extinguishing agent during spraying without adding moving parts to the nozzle, increasing the coverage area of ​​the extinguishing agent within the space during spraying. The intersecting oscillation significantly improves the diffusion rate of the extinguishing agent. Simultaneously, it eliminates the need for a separate directional adjustment device, simplifying the nozzle structure, improving its portability, and reducing clogging caused by complex nozzle structures. Furthermore, it ensures increased impact force of the sprayed extinguishing agent, significantly enhancing its extinguishing effect and efficiency.

[0033] Furthermore, in this solution, the sensing component 22 is used to identify and analyze the fluid concentration in the area corresponding to the outlet 21, and can automatically adjust the spray concentration in each outlet 21 direction according to the analysis results. This allows for precise control of the spray direction and spray concentration, improving the local extinguishing agent concentration and reducing the waste of extinguishing agent caused by large-area spraying, thereby improving the utilization rate of extinguishing agent and the extinguishing effect. At the same time, the original passive nozzles are replaced with active nozzles that automatically spray according to the fluid concentration, greatly improving the spraying effect and intelligent control.

[0034] By setting the nozzle inlet end 4 to be the same size as the existing conventional nozzle, the nozzle in this solution can be directly connected to the existing extinguishing agent delivery pipeline and interface, reducing the cost of modifying and upgrading the existing fire protection system and improving the applicability and compatibility of the nozzle.

[0035] Example 2 As attached Figure 6 As shown, this application also provides a fire extinguishing method for a cross-oscillating type fire extinguishing agent nozzle, applicable to the cross-oscillating type fire extinguishing agent nozzle in Embodiment 1. Specifically, it includes adjusting the nozzle spray area direction based on the determined fire situation inside the cabin via a connected aircraft fire extinguishing control system. During spraying, the fluid concentration at outlet 2 is acquired through the sensing component 22 at outlet 2. The control system automatically identifies the fire extinguishing agent fluid concentration within the current spray area, compares the current fluid concentration with a preset concentration, and adjusts the spray direction and concentration at the outlet based on the comparison result. In this embodiment, the fire extinguishing agent concentration can be detected using an existing gas sensor detection system based on the pressure difference principle.

[0036] In this embodiment, Halon fire extinguishing agent will be used for specific explanation. It is known that the effective fire extinguishing concentration (volume fraction) of this type of fire extinguishing agent is 6%. Therefore, based on the effective concentration of the fire extinguishing agent used, a preset concentration of 6% is set to ensure that the fire extinguishing agent concentration can achieve the desired fire extinguishing effect. When the nozzle detects a fire in a hidden area of ​​the aircraft, the flow control component controlling the nozzle will spray that area. During the initial spray, the outlets 21 in both the X and Y axes are fully opened for the initial fire extinguishing. During the spraying process, the fire extinguishing agent concentration around the outlets 21 is sensed by the front-end sensing component 22.

[0037] Specifically, the fire extinguishing area is divided into four directions—upper, lower, left, and right—according to the structure of exit 21. The upper and lower directions correspond to the Y-axis direction of exit 21, and the left and right directions correspond to the X-axis direction of exit 21. The sensing component 22 identifies the concentration of extinguishing agent in each of the four directions and compares it with the preset concentration in turn. When the concentration in the corresponding area is lower than 6%, or when the duration of the extinguishing agent concentration in the action area is less than 0.5 seconds, a secondary spray is performed to improve the efficiency of fire extinguishing spray, reduce the waste of extinguishing agent, achieve the fire extinguishing effect, and improve the utilization rate of extinguishing agent.

[0038] Specifically, it can be divided into the following situations: (1) When the concentration in the upper or lower region is detected to be less than 6%, the X-axis control valve 42 is closed so that the injection concentration of the first return channel port 51 and the second return channel port 52 is 0%; the Y-axis control valve 43 is opened so that the third return channel port 53 and the fourth return channel port 54 perform secondary injection in the Y-axis direction.

[0039] (2) When the concentration in the left or right area is detected to be less than 6%, the Y-axis control valve 43 is closed so that the injection concentration of the third return channel port 53 and the fourth return channel port is 0%; the X-axis control valve 42 is activated so that the first return channel port 51 and the second return channel port 52 perform secondary injection in the X-axis direction.

[0040] Specifically, the secondary spray concentration is determined based on the set concentration level and then sprayed.

[0041] Specifically, when the concentration is below 50% of the effective concentration, the corresponding fluid outlet sprays at the maximum spray concentration; when the concentration is above 50% of the effective concentration, spraying is performed at 50% of the maximum concentration. This precise control of the spray concentration ensures timely and rapid achievement of the effective concentration, while reducing extinguishing agent loss and improving extinguishing agent utilization.

[0042] This solution utilizes real-time fire detection to rapidly activate fire extinguishers, aiming them directly at the fire area to quickly suppress the fire and prevent its spread. Simultaneously, during the extinguishing process, the fluid field created by the sprayed extinguishing agent is monitored in real-time. Based on this fluid field distribution, the nozzle's spray direction and concentration are dynamically adjusted to specifically increase the extinguishing agent concentration in each area, flexibly regulating the spray range for wider and more uniform distribution. Furthermore, automatic detection enables secondary spraying, eliminating the need for large-scale spraying while effectively increasing the extinguishing agent concentration and duration within the designated area. This ensures spray pressure and accuracy, improves extinguishing agent efficiency, and reduces the amount of extinguishing agent used, minimizing waste.

[0043] The above are merely embodiments of the present invention. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A cross-oscillating type fire extinguishing agent nozzle, used for fire extinguishing in narrow, concealed areas inside an aircraft cabin, characterized in that: The device includes a housing; the housing comprises an outlet end, a spray chamber, and an inlet end connected in sequence; the outlet end includes a cross-shaped outlet, which has an inverted conical structure, with the upper cross shape formed by two perpendicularly intersecting rectangular openings; the upper outlet port has a length of 10-13mm; the width of the converging lower rectangular opening is the same as the width of the upper rectangular opening, and the diameter of the lower port is the same as the width at the intersection of the upper and lower ports, which is 4-6mm; a sensing component is provided around the outlet to identify the fluid concentration outside the outlet; the fire extinguishing area is divided into four directions—upper, lower, left, and right—according to the outlet structure, and the sensing component identifies the fire extinguishing agent concentration in each of the four directions; the spray chamber has a first oscillator and a second oscillator integrally formed inside, and the first oscillator and the second oscillator... The first oscillator includes a first coupling cavity and a first feedback channel; the second oscillator includes a second coupling cavity and a second feedback channel; wherein the central axes of the first and second coupling cavities overlap and intersect perpendicularly to form a coupling cavity, the upper end of the coupling cavity is connected to the outlet, and the lower end is connected to the inlet; the first and second feedback channels are perpendicular to each other and are located in the X-axis and Y-axis directions of the cross shape, respectively; a flow control component is provided on the inlet, which is connected to the first and second oscillators respectively, and is used to control the flow rate of the first and second oscillators respectively; the current fluid concentration in the current region is compared with the preset concentration in the current region, and the injection direction and injection concentration at the outlet are adjusted according to the comparison result.

2. The cross-oscillation type fire extinguishing agent nozzle according to claim 1, characterized in that: The first feedback channel includes a first reflux channel and a second reflux channel disposed opposite to each other on both sides of the first coupling cavity; the second feedback channel includes a third reflux channel and a fourth reflux channel disposed on both sides of the second coupling cavity; the upper ends of the first reflux channel, the second reflux channel, the third reflux channel and the fourth reflux channel are respectively connected to the bottom of the outlet, and the lower ends are respectively connected to the bottom of the coupling cavity, and correspondingly form the first reflux channel port, the second reflux channel port, the third reflux channel port and the fourth reflux channel port.

3. The cross-oscillation type fire extinguishing agent nozzle according to claim 1, characterized in that: The flow control assembly includes an X-axis control valve and a Y-axis control valve; the X-axis control valve is used to control and regulate the fluid flow in the first feedback channel located in the X-axis direction; the Y-axis control valve is used to control and regulate the fluid flow in the second feedback channel located in the Y-axis direction.

4. The cross-oscillation type fire extinguishing agent nozzle according to claim 3, characterized in that: The inlet end is provided with a cross-shaped conical inlet, which is connected to the cross direction of the outlet; the X-axis control valve is located in the X-axis direction of the conical inlet, and the Y-axis control valve is located in the Y-axis direction of the conical inlet.

5. A fire extinguishing method using a cross-oscillating type extinguishing agent nozzle, applicable to a cross-oscillating type extinguishing agent nozzle as described in any one of claims 1-4, characterized in that: Adjust the direction of the nozzle spray area based on the fire situation determined inside the cabin; During the injection process, the fluid concentration in the current injection area is automatically sensed by the sensing component at the front end of the outlet. The current fluid concentration is compared with the preset concentration, and the injection direction and injection concentration at the outlet end are adjusted according to the comparison result.

6. The fire extinguishing method using a cross-oscillating type fire extinguishing agent nozzle according to claim 5, characterized in that: The injection direction includes both the X-axis and Y-axis; the injection flow rate includes 0%-100%.

7. The fire extinguishing method using a cross-oscillating type fire extinguishing agent nozzle according to claim 6, characterized in that: The preset concentration is the effective concentration for fluid fire extinguishing. When the concentration is higher than the preset concentration, the spraying in that direction will stop. When the concentration is lower than the preset concentration, a second spraying will be performed on the area.

8. The fire extinguishing method using a cross-oscillating type fire extinguishing agent nozzle according to claim 7, characterized in that: The spray concentration is controlled and adjusted by the flow control component; when the concentration is lower than 50% of the preset concentration, a second spray is performed at the maximum spray concentration; when the concentration is higher than 50% of the preset concentration but lower than 100%, the spray is performed at 50% of the maximum concentration.

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