An automatic fire suppression system and control method for the entire vehicle and passenger compartment.

Abstract

This invention discloses an automatic fire suppression system and control method for a vehicle as a whole and its passenger compartment, relating to the field of vehicle fire safety. The system includes a vehicle frame and several seats, all installed at the bottom of the vehicle frame's inner cavity. The inner cavity of the vehicle frame is equipped with a fire suppression mechanism, which includes several protective tubes and a storage box. Through the arrangement of the protective tubes, storage tubes, and nozzles, and by fixing a detection mechanism containing temperature sensors, smoke sensors, and flame infrared sensors to the bottom of each seat, a fire detection and suppression coverage capability is formed for the passenger compartment space without blind spots. This effectively solves the problem of traditional systems being unable to respond to fire sources in non-preset areas such as under seats or in passageways due to the fixed positions of detectors and nozzles. The control unit receives signals from the three types of sensors and performs fusion analysis to avoid false triggering by a single parameter, ensuring reliable fire assessment and rapid response.

Description

Technical Field

[0001] This invention relates to vehicle fire safety technology, specifically to an automatic fire protection system and control method for the entire vehicle and passenger compartment. Background Technology

[0002] Vehicle fires are characterized by their suddenness, rapid spread, and concentrated heat release in confined spaces. They typically develop from localized smoldering to full-blown combustion within seconds, releasing large amounts of toxic fumes and igniting interior materials, seriously threatening the lives of occupants. Especially when a vehicle is in motion or parked, if it cannot be automatically identified and fire-fighting intervention initiated in the initial stage of a fire, and relies solely on the driver and passengers to manually operate the vehicle's fire extinguisher, the golden window for firefighting may be missed due to delayed detection, panicked operation, or loss of control of the fire, which can easily lead to an escalation of casualties.

[0003] Existing vehicle-mounted automatic fire suppression systems mostly focus on localized protection of the engine compartment or battery pack. Their detection and discharge mechanisms are typically fixed-point arrangements, and the extinguishing agent release path is singular with limited coverage. When the fire source is located in non-preset areas such as under the passenger seats or in the central aisle, existing systems struggle to effectively detect and accurately deliver extinguishing agents. Furthermore, they lack the ability to integrate and distinguish multi-dimensional fire signals within the cabin, such as temperature, smoke, and flames, leading to delayed response or malfunctions. More critically, these devices do not incorporate the entire passenger compartment into a unified protection system, making it impossible to achieve rapid flooding of the entire cabin in the early stages of a fire, thus failing to truly guarantee the survival safety of personnel in the enclosed vehicle.

[0004] Therefore, the applicant proposes an automatic fire suppression system and control method for the entire vehicle and the passenger compartment to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic fire suppression system and control method for the entire vehicle and passenger compartment, in order to solve the problems of existing vehicle-mounted automatic fire extinguishing devices that mainly provide local protection for the engine compartment or power battery pack, whose detectors and nozzles are fixed in position and cannot cover complex areas in the passenger compartment such as the bottom of the seats or the passageway, and which cannot integrate temperature, smoke and flame infrared signals for comprehensive judgment, resulting in slow response to passenger compartment fires and failure to achieve rapid suppression of fires throughout the entire compartment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic fire-fighting system for a vehicle as a whole and its passenger compartment, comprising a vehicle frame and several seats, all of which are installed at the bottom of the inner cavity of the vehicle frame. The inner cavity of the vehicle frame is equipped with a fire-extinguishing mechanism, which includes several protective tubes and a storage box. The tops of the protective tubes are fixedly connected to the top of the inner cavity of the vehicle frame, and the bottom of the storage box is fixedly connected to the bottom of the inner cavity of the vehicle frame. The inner cavity of each protective tube is provided with a storage tube, and the outer surface of the protective tube and along the protective tube... Several through slots are opened horizontally. One end of the storage tube extends through the side wall of the corresponding protective tube to one side of the protective tube. Several nozzles are fixedly connected to the outer surface of the storage tube and along the horizontal direction of the storage tube. The end of the nozzle away from the corresponding storage tube passes through the inner cavity of the corresponding through slot. The outer surfaces of two adjacent extension ends of the storage tube are fixedly connected by a transmission tube. A pressure pump is fixedly connected to one side of the storage tank. An electrically controlled three-way valve is connected to the outlet end of the pressure pump. One interface of the electrically controlled three-way valve is fixedly connected to one of the extension ends of the storage tube through a delivery tube.

[0007] The top of the storage box is fixedly connected to a control unit via a bracket. The bottom of the seat is provided with a detection mechanism, which includes a mounting base. The top of the mounting base is fixedly connected to the bottom of the corresponding seat. The bottom of the mounting base is fixedly connected to a temperature sensor, a smoke sensor, and a flame infrared sensor, respectively.

[0008] Furthermore, a battery rack is fixedly connected to the lower surface of the vehicle frame, and a placement slot is provided on both sides of the top of the battery rack. Side tubes are fixedly connected to the inner walls of both sides of the placement slot, and several nozzles are fixedly connected to one side of the side tube and along the horizontal direction of the side tube.

[0009] Furthermore, a connecting pipe is fixedly connected to one side of the bottom of one of the two side tubes. The end of the connecting pipe away from the corresponding side tube extends through the inner wall of the corresponding placement slot to the inner cavity of the other placement slot and is fixedly connected to the bottom of the corresponding side tube.

[0010] Furthermore, flow tubes are fixedly connected to both sides of the storage box, and the end of the flow tube away from the storage box passes through the top of the battery rack and is fixedly connected to the top side of the corresponding side tube.

[0011] Furthermore, the temperature sensor, smoke sensor, and flame infrared sensor are all electrically connected to the control unit.

[0012] Furthermore, an addition pipe is fixedly connected to one side of the top of the storage tank, and a valve is fixedly connected to the outer surface of the addition pipe; another port of the electrically controlled three-way valve is connected to two flow pipes, and the electrically controlled three-way valve is electrically connected to the control unit.

[0013] A control method for an automatic fire suppression system includes the following steps:

[0014] S1: The fire signal inside the vehicle frame cavity is monitored in real time by a detection mechanism installed at the bottom of the seat, and the fire signal in the battery area is monitored in real time by a fire detector installed in the battery rack slot.

[0015] S2: Transmits all fire signals to the control unit;

[0016] S3: The control unit determines the fire level based on the source and intensity of the fire signal.

[0017] If the fire signal in the vehicle frame cavity exceeds the preset threshold, it is determined to be a Level 1 fire (A).

[0018] If the fire signal in the placement slot exceeds the preset threshold, it is determined to be a Level 1 fire (B).

[0019] If the fire signals in both the vehicle frame cavity and the placement slot exceed the preset threshold, it is determined to be a level two fire.

[0020] Furthermore, when a fire is determined to be a Level 1 fire (A), the first firefighting rule shall be applied:

[0021] The control unit starts the pressurization pump and controls the electronically controlled three-way valve to open the flow path from the delivery pipe to the storage pipe, so that the extinguishing agent is sprayed directionally into the crew compartment through the nozzle, while the flow pipe and side pipe corresponding to the battery rack remain closed.

[0022] Furthermore, when the fire is determined to be a Level 1 fire (B), the second firefighting rule shall be applied:

[0023] The control unit starts the pressurization pump and controls the electronically controlled three-way valve to open the flow path from the flow pipe to the side pipe, so that the extinguishing agent is sprayed directionally into the placement tank through the nozzle, while the storage pipe and nozzle corresponding to the crew compartment remain closed.

[0024] Furthermore, when a fire is determined to be a level two fire, the third firefighting rule shall be applied:

[0025] The control unit starts the pressurization pump and controls the electronically controlled three-way valve to simultaneously open the flow paths of the delivery pipe and the flow pipe, so that the extinguishing agent is sprayed synchronously into the crew compartment through the nozzle and into the placement tank through the nozzle, thereby achieving coordinated full-coverage fire extinguishing of the crew compartment and the battery area.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] This solution, through the installation of protective pipes, storage pipes, and nozzles, along with a detection mechanism including temperature sensors, smoke sensors, and infrared flame sensors fixed to the bottom of each seat, forms a comprehensive fire detection and extinguishing coverage capability for the passenger compartment. This effectively solves the problem of traditional systems, which struggle to respond to fire sources in non-preset areas such as under seats or in passageways due to fixed detector and nozzle positions. The control unit receives signals from the three types of sensors and performs fusion analysis to avoid false triggering by a single parameter, ensuring reliable fire assessment and rapid response. Simultaneously, the flow of extinguishing agent output from the pressurized pump is dynamically controlled via an electronically controlled three-way valve, selectively supplying liquid to nozzles in the passenger compartment or the nozzles in the battery rack placement slot, achieving precise fire extinguishing on demand. This avoids ineffective spraying in single-area fires and simultaneously activates dual extinguishing paths when multiple fires occur simultaneously, truly constructing an integrated automatic fire-fighting system covering the passenger compartment and power battery area, improving fire control efficiency and occupant survival protection in the early stages of a vehicle fire.

[0028] This solution, through the setting of tiered thresholds and combined with independent fire monitoring data from both the vehicle frame cavity and the battery rack storage area, enables the control unit to intelligently determine whether a fire is classified as Level 1 (A), Level 1 (B), or Level 2 based on the signal source and intensity. This achieves a differentiated response mechanism for different fire scenarios. When the fire signal exceeds the limit only in the passenger compartment area, the system precisely activates the first fire suppression rule, opening the flow path from the delivery pipe to the storage pipe, allowing the extinguishing agent to be directed to cover the space around the seats via the nozzles, while the flow pipe and side pipe in the battery area remain closed to avoid resource waste. When the fire signal exceeds the limit only in the battery area, the system switches to the second fire suppression rule, opening the flow pipe to... The side pipe channel allows the extinguishing agent to act directly on the battery module in the placement tank through the nozzle, and the connecting pipe achieves pressure equalization between the two tanks to ensure uniform cooling. When the signals in both areas exceed the limit simultaneously, the system immediately activates the third extinguishing rule. The electronically controlled three-way valve synchronously connects the delivery pipe and the two flow pipes, enabling the nozzles and spray heads to work together to form a composite extinguishing mode of full flooding of the passenger compartment and precise local suppression of the battery. This hierarchical control strategy not only eliminates the redundant consumption of extinguishing agent caused by the traditional "full compartment discharge" system, but also ensures the synchronous protection capability of key areas under composite fire conditions, improving the intelligence level, response efficiency and safety redundancy of the vehicle's automatic fire protection system. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0030] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the battery rack structure provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the conveying pipe structure provided in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the side tube structure provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the flow tube structure provided in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the connecting pipe structure provided in an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the smoke sensor structure provided in an embodiment of the present invention;

[0037] Figure 8 The overall flowchart provided for embodiments of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Vehicle frame; 2. Fire extinguishing mechanism; 201. Protective pipe; 202. Through channel; 203. Nozzle; 204. Storage pipe; 205. Transfer pipe; 206. Delivery pipe; 207. Storage box; 208. Pressure pump; 209. Addition pipe; 210. Valve; 3. Detection mechanism; 301. Mounting base; 302. Temperature sensor; 303. Smoke sensor; 304. Flame infrared sensor; 4. Seat; 5. Control unit; 6. Battery rack; 7. Placement slot; 8. Side pipe; 9. Nozzle; 10. Connecting pipe; 11. Flow pipe. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] As attached Figure 1 To be continued Figure 8 As shown:

[0042] Example 1:

[0043] This invention provides an automatic fire suppression system for a vehicle as a whole and its passenger compartment, including a vehicle frame 1 and several seats 4. The seats 4 are all installed at the bottom of the inner cavity of the vehicle frame 1. A fire extinguishing mechanism 2 is provided within the inner cavity of the vehicle frame 1. The fire extinguishing mechanism 2 includes several protective pipes 201 and a storage box 207. The tops of the protective pipes 201 are fixedly connected to the top of the inner cavity of the vehicle frame 1, and the bottom of the storage box 207 is fixedly connected to the bottom of the inner cavity of the vehicle frame 1. A storage tube 204 is provided within the inner cavity of the protective pipes 201. Several through slots 202 are formed on the outer surface of the protective pipes 201 along their horizontal direction. One end of the discharge pipe 204 extends through the side wall of the corresponding protective pipe 201 to one side of the protective pipe 201. Several nozzles 203 are fixedly connected to the outer surface of the storage pipe 204 and along the horizontal direction of the storage pipe 204. The end of the nozzle 203 away from the corresponding storage pipe 204 passes through the inner cavity of the corresponding through groove 202. The outer surfaces of the extension ends of two adjacent storage pipes 204 are fixedly connected through a transmission pipe 205. A pressure pump 208 is fixedly connected to one side of the storage tank 207. An electrically controlled three-way valve is connected to the outlet end of the pressure pump 208. One interface of the electrically controlled three-way valve is fixedly connected to the extension end of one of the storage pipes 204 through a delivery pipe 206.

[0044] The top of the storage box 207 is fixedly connected to the control unit 5 via a bracket. The bottom of the seat 4 is provided with a detection mechanism 3. The detection mechanism 3 includes a mounting base 301. The top of the mounting base 301 is fixedly connected to the bottom of the corresponding seat 4. The bottom of the mounting base 301 is fixedly connected to a temperature sensor 302, a smoke sensor 303, and a flame infrared sensor 304, respectively.

[0045] A battery rack 6 is fixedly connected to the lower surface of the vehicle frame 1. A placement groove 7 is provided on both sides of the top of the battery rack 6. Side tubes 8 are fixedly connected to the inner walls of both sides of the placement groove 7. Several nozzles 9 are fixedly connected to one side of the side tube 8 and along the horizontal direction of the side tube 8.

[0046] Working principle: The detection mechanism 3 installed at the bottom of the seat 4 continuously monitors the internal environment of the vehicle frame 1. Temperature sensor 302, smoke sensor 303, and flame infrared sensor 304 collect heat, smoke, and flame characteristic signals respectively, and transmit the data to the control unit 5 in real time. When an initial fire occurs in the passenger compartment, the control unit 5 determines the fire level based on multi-source sensor information. If it is confirmed to be a Level A fire, the pressurization pump 208 is immediately activated, and the electronically controlled three-way valve is used to open the flow path from the delivery pipe 206 to the storage pipe 204. This allows the extinguishing agent in the storage tank 207 to be rapidly distributed to each nozzle 203 under pressure through the delivery pipe 206, storage pipe 204, and transmission pipe 205. The extinguishing agent then... The fire extinguishing agent is sprayed directionally throughout the passenger compartment through the through-slot 202 on the protective pipe 201, forming a full-coverage suppression. If thermal runaway occurs in the battery area placement slot 7, the system switches the flow path, allowing the fire extinguishing agent to enter the side pipe 8 through the flow pipe 11 and act precisely on the battery module through the nozzle 9. In the case of a level two fire where both the passenger compartment and the battery area are alarmed simultaneously, the electronically controlled three-way valve opens the dual channels simultaneously, enabling the nozzle 203 and the nozzle 9 to work together to complete the integrated fire extinguishing of the entire vehicle space. The storage box 207 is filled with clean fire extinguishing agent, which includes, but is not limited to, heptafluoropropane, perfluorohexanone, IG-541, IG-55, IG-100, IG-01 or thermal aerosols and other clean gases and aerosol fire extinguishing media.

[0047] To enhance personnel evacuation safety and fire extinguishing efficiency, the system will automatically lower the windows after confirming a fire, in conjunction with the vehicle's central control system, to facilitate smoke exhaust and create favorable conditions for occupant escape. In particular, when perfluorohexanone is selected as the extinguishing agent, given its extinguishing performance and environmental characteristics, the system can adopt a simpler layout: only one or two storage tanks 207 are needed to effectively cover the critical protection areas of the entire vehicle. Preferred installation locations include under the rear seats, under the front compartment of the driver's cabin, or inside the B-pillars on both sides of the vehicle. These locations ensure that the extinguishing agent can quickly spread to the entire passenger compartment after release, while also taking into account space utilization and system reliability. This solution is applicable to situations of battery thermal runaway in vehicles or new energy vehicles.

[0048] This solution utilizes a distributed fire suppression network consisting of a protective pipe 201, a storage pipe 204, and a nozzle 203, deployed at the top of the vehicle frame 1's inner cavity. Combined with a multimodal detection mechanism 3 integrating temperature sensors 302, smoke sensors 303, and flame infrared sensors 304 at the bottom of the seats 4, it achieves early identification of fire sources at any location within the passenger compartment and rapid, flood-like response throughout the entire compartment. This completely overcomes the blind spots and insufficient coverage issues caused by fixed-point placement in existing systems. Addressing the shortcomings of traditional devices—the inability to integrate multidimensional fire signals and the susceptibility to misjudgment or delayed action—this solution relies on… The control unit 5 jointly identifies temperature, smoke, and flame infrared signals, improving the accuracy of fire identification and the immediacy of response. At the same time, by intelligently switching the flow paths of the delivery pipe 206 and the flow pipe 11 through the electronically controlled three-way valve, the system can accurately activate the independent fire extinguishing subsystems in the passenger compartment or battery area according to the source of the fire, or achieve simultaneous intervention in both areas under complex fire conditions. For the first time, the entire passenger compartment space is incorporated into the active protection system, effectively suppressing the spread of fire and removing toxic smoke in the initial stage of a fire, buying critical escape time for passengers, and effectively ensuring the safety of life in the enclosed compartment.

[0049] Example 2:

[0050] This embodiment is basically the same as the previous embodiment, except that a connecting pipe 10 is fixedly connected to one side of the bottom of the two side pipes 8. The end of the connecting pipe 10 away from the corresponding side pipe 8 extends through the inner wall of the corresponding placement groove 7 to the inner cavity of the other placement groove 7 and is fixedly connected to the bottom of the corresponding side pipe 8.

[0051] A flow tube 11 is fixedly connected to both sides of the storage box 207. The end of the flow tube 11 away from the storage box 207 passes through the top of the battery rack 6 and is fixedly connected to the top side of the corresponding side tube 8.

[0052] Temperature sensor 302, smoke sensor 303 and flame infrared sensor 304 are all electrically connected to control unit 5.

[0053] A feeding tube 209 is fixedly connected to one side of the top of the storage box 207, and a valve 210 is fixedly connected to the outer surface of the feeding tube 209; another interface of the electrically controlled three-way valve is connected to two flow tubes 11, and the electrically controlled three-way valve is electrically connected to the control unit 5.

[0054] Working principle: A battery rack 6 is fixedly connected to the lower surface of the vehicle frame 1. The top two sides of the battery rack 6 have placement slots 7. Side tubes 8 are fixedly connected to the inner walls of both sides of the placement slots 7. Several nozzles 9 are fixedly connected to one side of the side tubes 8 and along the horizontal direction of the side tubes 8. When the power battery experiences thermal runaway, the extinguishing agent is sprayed directly into the placement slots 7 through the nozzles 9, achieving directional and efficient cooling and extinguishing of the battery module. Connecting pipes 10 are fixedly connected to the bottom of two of the side tubes 8, and the connecting pipes 10 are located away from the side tubes. One end of the side tube 8 extends through the inner wall of the corresponding placement slot 7 to the inner cavity of another placement slot 7 and is fixedly connected to the bottom of the corresponding side tube 8. This arrangement creates a continuous loop at the bottom of the side tubes 8 in both placement slots 7, achieving uniform distribution of the extinguishing agent between the two battery compartments and avoiding local pressure imbalance or insufficient coverage. Flow tubes 11 are fixedly connected to both sides of the storage tank 207. The end of the flow tube 11 away from the storage tank 207 extends through the top of the battery rack 6 and is fixedly connected to the top of the corresponding side tube 8. After the control unit 5 triggers the fire extinguishing command for the battery area, the pressurization pump 208 drives the extinguishing agent to be rapidly injected into the side tube 8 through the flow tube 11. This achieves an independent liquid supply path for the battery area, ensuring a fast fire extinguishing response and sufficient dosage. Temperature sensor 302, smoke sensor 303, and flame infrared sensor 304 are all electrically connected to the control unit 5. These three sensors transmit fire characteristic signals to the control unit 5 in real time. The control unit 5 performs multi-source data fusion analysis to determine the fire level, improving the accuracy of fire identification and reducing the probability of false alarms or missed alarms. A charging pipe 209 is fixedly connected to one side of the top of the storage tank 207, and a valve 210 is fixedly connected to the outer surface of the charging pipe 209. The other interface of the electrically controlled three-way valve is connected to two flow pipes 11. The electrically controlled three-way valve is electrically connected to the control unit 5. The control unit 5 controls the electrically controlled three-way valve to switch the flow path according to the fire type, selecting to conduct the delivery pipe 206 or the flow pipe 11. At the same time, the fire extinguishing agent can be replenished through the charging pipe 209 and sealed by the valve 210, which achieves the effect of independent or coordinated fire extinguishing of the crew compartment and battery area as needed, and supports system maintenance and fluid replenishment.

[0055] Example 3:

[0056] A control method for an automatic fire suppression system includes the following steps:

[0057] S1: The fire signal inside the vehicle frame 1 is monitored in real time by the detection mechanism 3 set at the bottom of the seat 4, and the fire signal in the battery area is monitored in real time by the fire detector set in the placement slot 7 of the battery rack 6.

[0058] S2: Transmit all fire signals to control unit 5;

[0059] S3: Control unit 5 determines the fire level based on the source and intensity of the fire signal.

[0060] If the fire signal in the inner cavity of the vehicle frame 1 exceeds the preset threshold, it is determined to be a Level 1 fire (A).

[0061] If the fire signal in slot 7 exceeds the preset threshold, it is determined to be a Level 1 fire (B).

[0062] If the fire signals in the inner cavity of the vehicle frame 1 and the placement slot 7 both exceed the preset threshold, it is determined to be a level 2 fire.

[0063] When a fire is determined to be a Level 1 fire (A), the first firefighting rule shall be applied:

[0064] Control unit 5 starts pressurization pump 208 and controls the electronically controlled three-way valve to open the flow path from delivery pipe 206 to storage pipe 204, so that the extinguishing agent is sprayed directionally into the crew compartment through nozzle 203, while the flow pipe 11 and side pipe 8 corresponding to battery rack 6 remain closed.

[0065] When the fire is determined to be a Level 1 fire (B), the second firefighting rule shall apply:

[0066] The control unit 5 starts the pressurization pump 208 and controls the electronically controlled three-way valve to open the flow path from the flow pipe 11 to the side pipe 8, so that the extinguishing agent is sprayed directionally into the placement tank 7 through the nozzle 9, while the storage pipe 204 and nozzle 203 corresponding to the crew compartment remain closed.

[0067] When a fire is determined to be a level two fire, the third firefighting rule shall apply:

[0068] Control unit 5 starts pressurization pump 208 and controls the electronically controlled three-way valve to simultaneously open the flow path of delivery pipe 206 and flow pipe 11, so that the extinguishing agent is sprayed synchronously into the crew compartment through nozzle 203 and into placement slot 7 through nozzle 9, so as to achieve coordinated full coverage fire extinguishing of the crew compartment and battery area.

[0069] Working principle: When the vehicle is running normally or parked, the system is in a standby monitoring state. Temperature sensors 302, smoke sensors 303 and flame infrared sensors 304 installed in the detection mechanism 3 at the bottom of each seat 4 provide real-time, multi-dimensional fire detection of the internal environment of the vehicle frame 1. At the same time, the fire detectors deployed in the placement slot 7 of the battery rack 6 synchronously monitor whether there are abnormal temperature rises, smoke emissions or open flames in the power battery area. All collected fire signals are transmitted to the control unit 5 via wired or wireless means, and are comprehensively analyzed by its built-in logic judgment module.

[0070] The control unit 5 executes a graded judgment strategy based on whether the source location and intensity of the fire signal exceed a preset safety threshold: if only one or more sensor signals in the crew compartment area exceed the limit, it is judged as a Level 1 fire (A); if only the fire detector signal in the battery area exceeds the limit, it is judged as a Level 1 fire (B); if the signals in both areas exceed the limit simultaneously, it is judged as a Level 2 fire.

[0071] Once the judgment result is generated, the control unit 5 immediately starts the pressurization pump 208 and sends corresponding control commands to the electrically controlled three-way valve according to the fire level. In the first-level fire situation A, the electrically controlled three-way valve switches to the first position, opening the flow path between the delivery pipe 206 and the storage pipe 204, so that the clean extinguishing agent in the storage tank 207 flows sequentially through the delivery pipe 206, the storage pipe 204 and the interconnected transmission pipe 205 under pressure, and finally sprays directionally into the crew compartment space from each nozzle 203 through the through groove 202 on the protective pipe 201, forming a rapid flood extinguishing atmosphere. The flow pipe 11 and the side pipe 8 leading to the battery area remain closed to prevent ineffective diversion of extinguishing agent. In the first-level fire situation B, the electrically controlled three-way valve switches to the first position, opening the flow path between the delivery pipe 206 and the storage pipe 204, so that the clean extinguishing agent in the storage tank 207 flows sequentially through the delivery pipe 206, the storage pipe 204 and the interconnected transmission pipe 205 under pressure, and finally sprays directionally from each nozzle 203 through the through groove 202 on the protective pipe 201, forming a rapid flood extinguishing atmosphere. The flow pipe 11 and the side pipe 8 leading to the battery area remain closed to prevent ineffective diversion of extinguishing agent. When the three-way valve is switched to the second position, the flow path of the flow pipe 11 and the side pipe 8 is opened. The extinguishing agent enters the side pipes 8 on both sides of the battery rack 6 through the flow pipe 11, and the pressure between the two placement slots 7 is balanced through the connecting pipe 10. Finally, the nozzle 9 accurately sprays the agent onto the surface of the battery module to implement localized and efficient cooling and explosion suppression. At this time, the storage pipe 204 and the nozzle 203 in the passenger compartment are in a closed state. In the case of a level II fire, the three-way valve is switched to the third position, and the flow path of the delivery pipe 206 and the two flow pipes 11 is opened. The extinguishing agent is output in two synchronous paths - one path covers the passenger compartment through the nozzle 203, and the other path acts on the battery area through the nozzle 9, realizing a coordinated and full-coverage fire extinguishing response in the key spaces of the vehicle.

[0072] This control method, through a closed-loop logic of "zonal perception - graded judgment - on-demand liquid supply," ensures accurate delivery of fire extinguishing resources, rapid response, and no cross-interference, thereby improving fire extinguishing efficiency and system reliability while ensuring the safety of the crew.

[0073] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic fire suppression system for a vehicle as a whole and its passenger compartment, comprising a vehicle frame (1) and a plurality of seats (4), wherein the plurality of seats (4) are all installed at the bottom of the inner cavity of the vehicle frame (1), characterized in that, The vehicle frame (1) has a fire extinguishing mechanism (2) inside its cavity. The fire extinguishing mechanism (2) includes several protective tubes (201) and a storage box (207). The tops of the protective tubes (201) are fixedly connected to the top of the cavity of the vehicle frame (1), and the bottom of the storage box (207) is fixedly connected to the bottom of the cavity of the vehicle frame (1). The cavity of the protective tubes (201) has a storage tube (204). The outer surface of the protective tubes (201) and along the horizontal direction of the protective tubes (201) have several through slots (202). One end of the storage tube (204) extends through the side wall of the corresponding protective tube (201) to the protective tube (204). On one side of storage tube (201), a plurality of nozzles (203) are fixedly connected to the outer surface of storage tube (204) and along the horizontal direction of storage tube (204), and the end of nozzle (203) away from the corresponding storage tube (204) passes through the inner cavity of the corresponding through groove (202), and the outer surfaces of the extension ends of two adjacent storage tubes (204) are fixedly connected to each other through a transmission pipe (205); a pressure pump (208) is fixedly connected to one side of storage box (207), and an electrically controlled three-way valve is connected to the outlet end of the pressure pump (208), and one interface of the electrically controlled three-way valve is fixedly connected to the extension end of one of the storage tubes (204) through a delivery pipe (206); The top of the storage box (207) is fixedly connected to the control unit (5) by a bracket, and the bottom of the seat (4) is provided with a detection mechanism (3). The detection mechanism (3) includes a mounting base (301). The top of the mounting base (301) is fixedly connected to the bottom of the corresponding seat (4). The bottom of the mounting base (301) is fixedly connected to a temperature sensor (302), a smoke sensor (303), and a flame infrared sensor (304).

2. An automatic fire suppression system for a vehicle as a whole and its passenger compartment according to claim 1, characterized in that, A battery rack (6) is fixedly connected to the lower surface of the vehicle frame (1). A placement slot (7) is provided on both sides of the top of the battery rack (6). A side tube (8) is fixedly connected to the inner wall of both sides of the placement slot (7). Several nozzles (9) are fixedly connected to one side of the side tube (8) and along the horizontal direction of the side tube (8).

3. An automatic fire suppression system for a vehicle as a whole and its passenger compartment according to claim 2, characterized in that, One of the two side tubes (8) is fixedly connected to a connecting tube (10) on one side of its bottom. The end of the connecting tube (10) away from the corresponding side tube (8) extends through the inner wall of the corresponding placement groove (7) to the inner cavity of another placement groove (7) and is fixedly connected to the bottom of the corresponding side tube (8).

4. An automatic fire suppression system for a vehicle as a whole and its passenger compartment according to claim 3, characterized in that, The storage box (207) is fixedly connected to two sides of a flow tube (11). The end of the flow tube (11) away from the storage box (207) passes through the top of the battery rack (6) and is fixedly connected to the top side of the corresponding side tube (8).

5. An automatic fire suppression system for a vehicle as a whole and its passenger compartment according to claim 1, characterized in that, The temperature sensor (302), smoke sensor (303), and flame infrared sensor (304) are all electrically connected to the control unit (5).

6. An automatic fire suppression system for a vehicle as a whole and its passenger compartment according to claim 1, characterized in that, A feeding tube (209) is fixedly connected to one side of the top of the storage box (207), and a valve (210) is fixedly connected to the outer surface of the feeding tube (209); the other port of the electrically controlled three-way valve is connected to two flow pipes (11), and the electrically controlled three-way valve is electrically connected to the control unit (5).

7. A control method for an automatic fire suppression system, applied to an automatic fire suppression system for a vehicle as a whole and passenger compartment as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1: The fire signal inside the vehicle frame (1) is monitored in real time by the detection mechanism (3) set at the bottom of the seat (4), and the fire signal in the battery area is monitored in real time by the fire detector in the placement slot (7) of the battery rack (6). S2: Transmit all fire signals to the control unit (5); S3: Control unit (5) determines the fire level based on the source and intensity of the fire signal. If the fire signal in the inner cavity of the vehicle frame (1) exceeds the preset threshold, it is determined to be a Level 1 fire (A). If the fire signal in the placement slot (7) exceeds the preset threshold, it is determined to be a level 1 fire (B). If the fire signal in the inner cavity of the vehicle frame (1) and the placement slot (7) both exceed the preset threshold, it is determined to be a level two fire.

8. The control method for an automatic fire suppression system according to claim 7, characterized in that, When a fire is determined to be a Level 1 fire (A), the first firefighting rule shall be applied: The control unit (5) starts the pressurization pump (208) and controls the electronically controlled three-way valve to open the flow path from the delivery pipe (206) to the storage pipe (204), so that the extinguishing agent is sprayed directionally into the crew compartment through the nozzle (203), while the flow pipe (11) and the side pipe (8) corresponding to the battery rack (6) remain closed.

9. The control method for an automatic fire suppression system according to claim 7, characterized in that, When the fire is determined to be a Level 1 fire (B), the second firefighting rule shall apply: The control unit (5) starts the pressurization pump (208) and controls the electric three-way valve to open the flow path from the flow pipe (11) to the side pipe (8), so that the extinguishing agent is sprayed directionally into the placement tank (7) through the nozzle (9), while the storage pipe (204) and nozzle (203) corresponding to the crew compartment remain closed.

10. The control method for an automatic fire suppression system according to claim 7, characterized in that, When a fire is determined to be a level two fire, the third firefighting rule shall apply: The control unit (5) starts the pressurization pump (208) and controls the electronically controlled three-way valve to simultaneously open the flow path of the delivery pipe (206) and the flow pipe (11), so that the extinguishing agent is sprayed synchronously into the crew compartment through the nozzle (203) and into the placement slot (7) through the nozzle (9), so as to achieve coordinated full coverage fire extinguishing of the crew compartment and the battery area.

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