New energy automobile chassis fire suppression device and method

Abstract

The invention relates to the technical field of automobile chassis fire extinguishing, in particular to a new energy automobile chassis fire extinguishing device which comprises a bottom plate frame and a chassis base, a booster water pump is fixedly mounted on the left side of a water storage tank, and a first fire extinguishing pipe frame is fixedly mounted on the inner side of the bottom plate frame; a second fire extinguishing pipe frame is fixedly installed on the inner side of the bottom plate frame, and a pneumatic device is arranged on the outer side of the storage bottle. According to the new energy automobile chassis fire extinguishing device and method, by detecting high-temperature infrared radiation and smoke dust concentration change data during fire breakout, the fire breakout state of a chassis base is cooperatively judged, water is fed into a first fire extinguishing pipe frame and a second fire extinguishing pipe frame correspondingly to spray the surfaces of the upper side and the lower side of the chassis base, and primary fire suppression and extinguishing treatment is achieved; the hot melt adhesive plugging layer is melted through combustion at high temperature, liquid perfluorohexanone is promoted to be gasified and expanded, water-based vermiculite dispersion liquid is promoted to enter the seepage pipe, the water-based vermiculite dispersion liquid is sprayed to the inner cavity of the chassis base through the seepage opening, and safe fire extinguishing treatment is further achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile chassis fire extinguishing, and in particular to a new energy automobile chassis fire extinguishing device and method. Background Art

[0002] The vehicle chassis is generally composed of four major systems: the transmission, the travel system, the braking system, and the steering system. The chassis not only provides the vehicle's overall strength and rigidity but also directly impacts its handling, stability, safety, and comfort. Therefore, the structure and function of the vehicle chassis are crucial to its design and operation. Due to its complex structure, the chassis is prone to fire in a collision. To effectively minimize the damage to system components and the resulting harm to passengers caused by a large-scale chassis fire, a chassis fire suppression device is required to effectively extinguish fires within the vehicle chassis.

[0003] After searching, it was found that according to the invention patent with Chinese patent publication number CN119236343A, a new energy vehicle electric vehicle chassis puncture fire extinguishing device is disclosed. The new energy vehicle electric vehicle chassis puncture fire extinguishing device in the invention patent is to puncture the battery pack when a fire occurs in the new energy vehicle battery. At the same time, it uses fire water to spray water to cool the new energy vehicle battery. It can effectively solve the problem that a fire inside the new energy vehicle battery cannot be directly extinguished.

[0004] However, directly puncturing the battery and spraying water is not a commonly used safety fire extinguishing measure. When puncturing the battery, it is easy to cause a short circuit due to direct contact between the positive and negative electrode materials inside the battery, resulting in more violent combustion or explosion. In addition, existing automobile batteries are mostly composed of multiple battery cells. At this time, puncturing one battery cell may cause a chain reaction in adjacent battery cells, triggering thermal runaway and spread of the entire battery pack, posing a great potential threat to the loss of automobile chassis system components and surrounding equipment and personal safety. Therefore, based on the above-mentioned technical problems, a new energy vehicle chassis fire extinguishing device and method are proposed. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the present invention provides a new energy vehicle chassis fire extinguishing device and method, which has the advantages of dual fire suppression and fire extinguishing treatment combining external water spraying and internal fire extinguishing agent spraying to achieve safe and efficient fire extinguishing of the chassis, and solves the problem in the above-mentioned background technology that the existing new energy vehicle electric vehicle chassis puncture fire extinguishing device uses a treatment method of directly puncturing the chassis battery and spraying water, which is prone to thermal runaway and even violent explosion due to battery short circuit.

[0007] (2) Technical solution

[0008] To achieve the dual fire suppression and extinguishing treatment of combining external water spraying with internal fire extinguishing agent spraying, thereby achieving the purpose of safe and efficient fire extinguishing on the chassis, the present invention provides the following technical solution: a new energy vehicle chassis fire extinguishing device, comprising a chassis frame on which vehicle wheels are movably mounted, and a chassis seat mounted on the inner side of the chassis frame, wherein the inner side of the chassis frame is provided with a safety fire extinguishing structure;

[0009] The safety fire extinguishing structure includes a water tank fixed to the bottom of the chassis seat, a booster water pump is fixedly installed on the left side of the water tank, a first fire extinguishing pipe rack is fixedly installed on the inner side of the bottom plate frame and above the chassis seat, a second fire extinguishing pipe rack is fixedly installed on the inner side of the bottom plate frame and below the chassis seat, an infrared temperature sensor and a smoke sensor are arranged on the inner side of the bottom plate frame, a number of seepage pipes are fixedly installed inside the chassis seat, an installation box is fixedly installed on the bottom of the chassis seat, a storage bottle is placed inside the installation box, and a pneumatic device is arranged on the outside of the storage bottle.

[0010] Preferably, the right side of the booster water pump is connected to the left side of the water tank through a first connecting pipe, and water outlets are provided on the front and rear sides of the booster water pump. The first fire extinguishing pipe rack includes a first through pipe fixed on the inner side of the bottom plate frame, and one of the water outlets is connected to the top of the first through pipe through a second connecting pipe.

[0011] Preferably, the front and rear ends of the first through pipe are fixedly connected to the second through pipe, and the two second through pipes are respectively located on the inner front wall and the inner rear wall of the bottom plate frame. Several equally distributed first atomizing nozzles are fixedly connected to the side of the two second through pipes facing the chassis seat.

[0012] Preferably, the second fire extinguishing pipe rack includes a third through pipe fixed on the inner side of the base frame, a number of fourth through pipes are connected to the inner side of the third through pipe, and a number of solenoid valve seats are fixedly installed on the inner rear wall of the third through pipe, and the rear end of each of the fourth through pipes is fixedly connected to each solenoid valve seat.

[0013] Preferably, the top of each of the fourth through tubes is fixedly connected to a plurality of equally spaced second atomizing nozzles, a supporting platform is fixed on the inner side of the gap between the fourth through tubes through a support rod, the infrared temperature sensor and the smoke sensor are both located on the top of the supporting platform, a control box is fixedly installed on the top left side of the chassis seat, a power module, a main control MCU module and a logic control module are arranged inside the control box, and the infrared temperature sensor and the smoke sensor are connected to the main control MCU module signal through a control circuit.

[0014] Preferably, an infusion tube is fixedly connected to the left side of the storage bottle, and the infusion tube is connected to the left side of the bottom of the seepage tube at the end facing away from the storage bottle. Aqueous vermiculite dispersion is stored inside the storage bottle, and a number of leakage holes are opened on the outer wall of the seepage tube.

[0015] Preferably, the pneumatic device includes temperature-sensitive copper tubes fixed to the bottom of the chassis seat and arranged in a linear position, the inner side of the top of each temperature-sensitive copper tube and the inner side of each leakage port are filled and sealed with a heat-sensitive hot melt adhesive layer, and the outer end of each temperature-sensitive copper tube is fixedly connected to a liquid storage tube with a ring structure, and the interior of the liquid storage tube is filled with liquid perfluorohexanone.

[0016] Preferably, the top end of the liquid storage tube is connected to the outer wall of the temperature-sensitive copper tube, and the bottom end thereof is a closed structure. The bottom of the temperature-sensitive copper tube is fixedly connected to an air pipe, and the air pipe is connected to the right side of the storage bottle at the end facing away from the temperature-sensitive copper tube.

[0017] A method for extinguishing a fire on a chassis of a new energy vehicle comprises the following steps:

[0018] S1. Multiple infrared temperature sensors and smoke sensors are installed at the bottom of the chassis to detect heat radiation and smoke generated by combustion. When both the heat and smoke concentration data reach the set threshold, the control box's main MCU module determines that the chassis has caught fire.

[0019] S2. The booster pump is started by the logic control module to send water to the first and second fire extinguishing pipe racks, spraying the upper and lower sides of the chassis seat to achieve the first step of the fire suppression procedure;

[0020] S3. When the chassis seat catches fire, the high temperature melts the temperature-sensitive copper tube and the heat-sensitive hot-melt adhesive layer inside the leak hole. At the same time, the liquid perfluorohexanone inside the storage tube is rapidly vaporized upon contact with the high temperature, and the gaseous perfluorohexanone enters the storage bottle through the gas pipe.

[0021] S4. Push the aqueous vermiculite dispersion inside the storage bottle into the seepage pipe as a fire extinguishing agent, and gush out through the leakage port, thereby quickly infiltrating the fire site, so as to achieve the second step of strengthening the fire suppression and fire extinguishing procedure, and realize the effect of efficient fire extinguishing on the vehicle chassis.

[0022] (3) Beneficial effects

[0023] Compared with the prior art, the present invention provides a new energy vehicle chassis fire extinguishing device and method, which has the following beneficial effects:

[0024] 1. This new energy vehicle chassis fire extinguishing device and method uses infrared temperature sensors and smoke sensors to detect high-temperature infrared radiation and smoke concentration change data generated when the chassis seat is on fire. The main control MCU module analyzes and processes the data to collaboratively determine the fire status of the chassis seat. Then, the booster water pump is controlled to send water into the first fire extinguishing pipe rack and the second fire extinguishing pipe rack respectively, spraying the upper and lower surfaces of the chassis seat to achieve preliminary fire suppression and prevent the spread of fire.

[0025] 2. This new energy vehicle chassis fire extinguishing device and method, since the gas pressure and temperature in the inner cavity of the chassis seat will increase after a fire, the high temperature of combustion is used to melt the hot melt adhesive sealing layer on the temperature-sensitive copper tube and the seepage tube, and then the temperature-sensitive copper tube is used to conduct the high temperature to the liquid storage tube to promote the rapid gasification and expansion of liquid perfluorohexanone, thereby pushing the aqueous vermiculite dispersion in the storage bottle into the seepage tube and spraying it into the inner cavity of the chassis seat through the leakage port, further achieving safe fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an overall schematic diagram of the automobile chassis fire extinguishing device of the present invention;

[0027] Figure 2 This is a schematic diagram of the inner side of the bottom plate frame structure of the present invention;

[0028] Figure 3 for Figure 2 Schematic diagram of the middle part structure;

[0029] Figure 4 This is a schematic structural diagram of the first fire extinguishing pipe rack and the second fire extinguishing pipe rack of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the carrier platform of the present invention;

[0031] Figure 6 This is a schematic diagram of the chassis structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the bottom plate frame structure of the present invention;

[0033] Figure 8 This is a front view of the chassis base structure of the present invention;

[0034] Figure 9 for Figure 8 sectional view of .

[0035] In the figure: 1. bottom plate frame; 2. chassis base; 3. safety fire extinguishing structure; 301. water storage tank; 302. booster water pump; 303. first fire extinguishing pipe rack; 3031. first through pipe; 3032. second through pipe; 3033. first atomizing nozzle; 304. second fire extinguishing pipe rack; 3041. third through pipe; 3042. fourth through pipe; 3043. solenoid valve seat; 3044. second atomizing nozzle; 305. infrared temperature sensor; 306. smoke sensor; 307. seepage pipe; 308. installation box; 309. storage bottle; 310. pneumatic device; 3101. temperature-sensitive copper tube; 3102. liquid storage pipe; 3103. gas pipe; 4. carrying platform; 5. control box; 6. liquid infusion pipe; 7. leakage port. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0037] Example 1

[0038] In this embodiment, a water inlet is provided at the bottom of the water tank 301 to facilitate timely water replenishment inside the water tank 301. When the infrared detector of the infrared temperature sensor 305 receives infrared radiation generated by the high temperature of combustion and reaches the high temperature detection threshold, and the photoelectric detector of the smoke sensor 306 detects the change in the amount of received light affected by air particles and reaches the smoke concentration detection threshold, the process of triggering the main control MCU module to determine and issue an alarm includes:

[0039] 1) Data collection and judgment: The infrared temperature sensor 305 periodically reads the temperature value through the I2C protocol, and sets a two-level warning threshold in the sensor control module, including a first-level warning trigger of 80°C and a second-level warning trigger of 120°C;

[0040] The smoke sensor 306 obtains the concentration voltage value through ADC sampling and sets the detected smoke concentration to ≥ 2mg / m 3 The alarm is triggered when the main control MCU module detects the temperature exceeding the threshold warning data and the smoke concentration exceeding the threshold warning data at the same time, it outputs a high level to the relay IN terminal and closes the water pump circuit. At the same time, the MOSFET drive circuit adjusts the water pump flow by adjusting the duty cycle control, and uses the optical coupler isolation module to prevent the water pump current from backwashing and damaging the main control MCU module;

[0041] 2) Wiring control process:

[0042] The infrared temperature sensor 305 is connected to the GPIO21 pin of the main control MCU module through the I2CSDA interface, and its I2CSCL interface is connected to GPIO22. The smoke sensor 306 is connected to the MCU ADC pin of the main control MCU module through the analog output interface AO. The detected high temperature data and smoke concentration data are input into the main control MCU module through the control circuit;

[0043] After analysis and processing by the main control MCU module, its GPIO output pin is connected to the relay IN control end to achieve the optocoupler isolation effect, and the PWM pin of the main control MCU module is connected to the Gate level of the MOSFET drive circuit. When the output level instruction is received, the booster water pump 302 is controlled to turn on.

[0044] Example 2

[0045] In this embodiment, water is pressurized by a booster water pump 302 and then fed into a first fire extinguishing pipe rack 303 and a second fire extinguishing pipe rack 304. The water is first fed into a second pipe 3032 via a first through pipe 3031, and then sprayed onto the upper area of the chassis base 2 using a first atomizing nozzle 3033 on the second through pipe 3032.

[0046] A number of supporting platforms 4 are set at equidistant positions at the bottom of the chassis base 2. At this time, the bottom of the chassis base 2 is divided into zones, and the infrared temperature sensor 305 and the smoke sensor 306 are used to detect the fire situation in each block. When the infrared temperature sensor 305 and the smoke sensor 306 of the corresponding block detect the temperature threshold and the smoke concentration threshold, the main control MCU module controls the solenoid valve seat 3043 of the corresponding block to open, and uses the third through pipe 3041 to send water through the opened solenoid valve seat 3043 to the fourth through pipe 3042 at the corresponding position, and then the second atomizing nozzle 3044 sprays the bottom of the chassis base 2 to extinguish the fire.

[0047] Example 3

[0048] In this embodiment, due to the fire in the chassis base 2, the gas pressure and temperature in its inner cavity will increase. At this time, the burning high temperature contacts the temperature-sensitive copper tube 3101 and the heat-sensitive hot-melt adhesive layer inside the leakage port 7, causing them to melt. The high temperature is transmitted to the liquid storage tube 3102 through the temperature-sensitive copper tube 3101, heating the liquid perfluorohexanone inside and causing it to vaporize rapidly. The liquid perfluorohexanone maintains a liquid state at room temperature, with an initial vaporization temperature of approximately 30°C. As the temperature gradually increases, the vaporization rate gradually increases, reaching a maximum vaporization rate at 90°C, thereby rapidly generating gaseous perfluorohexanone.

[0049] Due to the increase in the pressure in the inner cavity of the chassis seat 2, the vaporized perfluorohexanone enters the storage bottle 309 through the liquid storage tube 3102 and the gas transmission tube 3103, so that the aqueous vermiculite dispersion is pushed by the gas and enters the seepage tube 307. At this time, the leakage port 7 of the seepage tube 307 is opened by the melting of the hot melt adhesive layer, so that the aqueous vermiculite dispersion is quickly sprayed as a fire extinguishing agent to infiltrate the interior of the chassis seat 2, thereby achieving the effect of efficient fire suppression and fire extinguishing.

[0050] In summary, the specific working process of the new energy vehicle chassis fire extinguishing device and method is as follows:

[0051] 1) When a fire occurs on the chassis base 2, high temperatures and flames are generated. Multiple sets of infrared temperature sensors 305 and smoke sensors 306 are equidistantly arranged at the bottom of the chassis base 2. The infrared detectors of the infrared temperature sensors 305 receive infrared radiation generated by the high temperature of the combustion, while the photoelectric detectors of the smoke sensors 306 detect changes in the amount of received light due to air particles. When the detected temperature and smoke particle concentration, after analysis and processing by the main control MCU module, are determined to have reached a set threshold, a fire is detected on the chassis base 2.

[0052] 2) The main control MCU module outputs a level signal to the logic control module, which controls the booster pump 302 to start via the relay module of the logic control module. The water in the water tank 301 is pressurized and delivered to the first fire extinguishing pipe rack 303 and the second fire extinguishing pipe rack 304. The first atomizing nozzle 3033 on the second through pipe 3032 and the second atomizing nozzle 3044 on the fourth through pipe 3042 spray the upper and lower sides of the chassis base 2, thus completing the first step of the fire suppression procedure on the chassis base 2 and preventing the fire from spreading further.

[0053] 3) Due to the fire in the chassis base 2, the pressure and temperature in its inner cavity increase. The high temperature of the combustion first melts the heat-sensitive hot-melt adhesive layer on the inner side of the top of the temperature-sensing copper tube 3101 and the inner side of the leakage port 7, thereby opening the temperature-sensing copper tube 3101 and the leakage pipe 307, which were blocked at room temperature. The copper structure of the temperature-sensing copper tube 3101 has excellent thermal conductivity, and the high temperature is transferred to the liquid storage pipe 3102.

[0054] 4) The liquid perfluorohexanone in the liquid storage tube 3102 will begin to vaporize at 30°C, and the vaporization rate will gradually increase as the temperature rises. At this time, the perfluorohexanone will be rapidly vaporized due to the high temperature of combustion, and will be affected by the internal pressure of the chassis base 2. The vaporized perfluorohexanone will enter the storage bottle 309 through the liquid storage tube 3102 and the gas pipe 3103, and then push the aqueous vermiculite dispersion in the storage bottle 309 into the seepage pipe 307 through the liquid infusion pipe 6, and then spray the inner cavity of the chassis base 2 through the leakage port 7, quickly infiltrating the fire area, realizing the second step of the fire suppression and fire extinguishing procedure, thereby quickly extinguishing the fire to avoid further combustion.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A new energy vehicle chassis fire extinguishing device, comprising a bottom plate frame (1) on which vehicle wheels are movably mounted, and a chassis seat (2) mounted on the inner side of the bottom plate frame (1), characterized in that: A safety fire extinguishing structure (3) is provided on the inner side of the bottom plate frame (1); The safety fire extinguishing structure (3) comprises a water storage tank (301) fixed to the bottom of the chassis seat (2), a booster water pump (302) fixedly installed on the left side of the water storage tank (301), a first fire extinguishing pipe rack (303) fixedly installed on the inner side of the bottom plate frame (1) and above the chassis seat (2), a second fire extinguishing pipe rack (304) fixedly installed on the inner side of the bottom plate frame (1) and below the chassis seat (2), an infrared temperature sensor (305) and a smoke sensor (306) are arranged on the inner side of the bottom plate frame (1), a number of seepage pipes (307) are fixedly installed inside the chassis seat (2), an installation box (308) is fixedly installed at the bottom of the chassis seat (2), a storage bottle (309) is placed inside the installation box (308), and a pneumatic device (310) is arranged on the outside of the storage bottle (309).

2. The new energy vehicle chassis fire extinguishing device according to claim 1, characterized in that: The right side of the booster water pump (302) is connected to the left side of the water tank (301) via a first connecting pipe, and water outlets are provided on the front and rear sides of the booster water pump (302). The first fire extinguishing pipe rack (303) includes a first through pipe (3031) fixed on the inner side of the bottom plate frame (1), and one of the water outlets is connected to the top of the first through pipe (3031) via a second connecting pipe.

3. The new energy vehicle chassis fire extinguishing device according to claim 2, characterized in that: The front and rear ends of the first through-tube (3031) are both fixedly connected to second through-tubes (3032), and the two second through-tubes (3032) are respectively located on the inner front wall and the inner rear wall of the bottom plate frame (1). A plurality of first atomizing nozzles (3033) distributed at equal intervals are fixedly connected to the sides of the two second through-tubes (3032) facing the chassis seat (2).

4. The new energy vehicle chassis fire extinguishing device according to claim 1, characterized in that: The second fire extinguishing pipe rack (304) includes a third through pipe (3041) fixed on the inner side of the bottom plate frame (1), a plurality of fourth through pipes (3042) are connected through the inner side of the third through pipe (3041), a plurality of solenoid valve seats (3043) are fixedly installed on the inner rear wall of the third through pipe (3041), and the rear end of each fourth through pipe (3042) is fixedly connected to each solenoid valve seat (3043).

5. The new energy vehicle chassis fire extinguishing device according to claim 4, characterized in that: The top of each of the fourth through tubes (3042) is fixedly connected to a plurality of equally spaced second atomizing nozzles (3044); a support platform (4) is fixed to the inner side of the gap between the fourth through tubes (3042) via a support rod; the infrared temperature sensor (305) and the smoke sensor (306) are both located on the top of the support platform (4); a control box (5) is fixedly installed on the left side of the top of the chassis seat (2); a power module, a main control MCU module and a logic control module are arranged inside the control box (5); the infrared temperature sensor (305) and the smoke sensor (306) are connected to the main control MCU module signal through a control circuit.

6. The new energy vehicle chassis fire extinguishing device according to claim 1, characterized in that: The left side of the storage bottle (309) is fixedly connected to an infusion tube (6), and the infusion tube (6) is connected to the left side of the bottom of the seepage tube (307) at the end facing away from the storage bottle (309). A water-based vermiculite dispersion is stored inside the storage bottle (309), and the outer wall of the seepage tube (307) is provided with a number of leakage holes (7).

7. The new energy vehicle chassis fire extinguishing device according to claim 1, characterized in that: The pneumatic device (310) comprises temperature-sensitive copper tubes (3101) fixed to the bottom of the chassis seat (2) and arranged in a linear position. The inner side of the top of each temperature-sensitive copper tube (3101) and the inner side of each leakage port (7) are filled and sealed with a heat-sensitive hot melt adhesive layer. The outer end of each temperature-sensitive copper tube (3101) is fixedly connected to a liquid storage tube (3102) with a ring structure. The interior of the liquid storage tube (3102) is filled with liquid perfluorohexanone.

8. The new energy vehicle chassis fire extinguishing device according to claim 1, characterized in that: The top end of the liquid storage tube (3102) is connected to the outer wall of the temperature-sensitive copper tube (3101), and the bottom end thereof is a closed structure. The bottom of the temperature-sensitive copper tube (3101) is fixedly connected to an air supply pipe (3103), and the air supply pipe (3103) is connected to the right side of the storage bottle (309) at the end facing away from the temperature-sensitive copper tube (3101).

9. A method for extinguishing a fire on a chassis of a new energy vehicle, characterized by: The implementation steps include: S1. By setting multiple sets of infrared temperature sensors (305) and smoke sensors (306) at the bottom of the chassis base (2), the heat radiation and smoke substances generated during combustion are detected. When the heat data and smoke concentration data reach the set threshold, the main control MCU module of the control box (5) determines that the chassis base (2) is on fire; S2. The booster pump (302) is started by the logic control module to send water to the first fire extinguishing pipe rack (303) and the second fire extinguishing pipe rack (304), spraying the upper and lower sides of the chassis seat (2) to achieve the first step of the fire suppression procedure; S3. When the chassis seat (2) catches fire, the high temperature will melt the temperature-sensitive copper tube (3101) and the heat-sensitive hot-melt adhesive layer on the inside of the leakage port (7). At the same time, the liquid perfluorohexanone inside the liquid storage tube (3102) will be rapidly vaporized upon contact with the high temperature, and the gaseous perfluorohexanone will enter the storage bottle (309) through the gas pipe (3103); S4. Push the aqueous vermiculite dispersion inside the storage bottle (309) as a fire extinguishing agent into the seepage pipe (307), and gush out through the leakage port (7), thereby quickly infiltrating the fire site, so as to achieve the second step of strengthening the fire suppression and fire extinguishing procedure, and realize the efficient fire extinguishing effect on the automobile chassis.

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