Fire extinguishing system for automobile engine compartment

Abstract

The invention relates to the technical field of vehicle fire extinguishing, in particular to an automobile engine compartment fire extinguishing system which comprises a vehicle body, a dry powder fire extinguisher is installed in a luggage compartment of the vehicle body, a transition connector is installed at the driving end of the dry powder fire extinguisher, and a normally-closed electromagnetic valve is installed at the end, away from the dry powder fire extinguisher, of the transition connector. And a pipe joint is mounted at the output end of the normally closed electromagnetic valve. The first sensor and the second sensor which are of the same structure are installed on the two sides of the inner wall of the engine cabin, an all-dimensional fire monitoring network is constructed, all-weather real-time monitoring is conducted on the environment in the cabin, monitoring blind areas are effectively avoided, it is ensured that smoke signals generated at any position can be captured in time, and the safety of the engine is improved. The fire monitoring accuracy and reliability are greatly improved, precious time is won for follow-up fire extinguishing actions, spraying fire extinguishing can be conducted on a fire point at the initial stage of a fire, fire spreading is effectively avoided, and the safety of a vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle fire extinguishing, and particularly to an engine compartment fire extinguishing system for an automobile. Background Art

[0002] The engine compartment of an automobile is an important part of the vehicle and is located at the front end of the vehicle. It is a relatively independent space that mainly houses key components such as the engine, transmission, cooling system, intake system, exhaust system, and electrical system. The engine compartment provides a mounting position and protection for these components. Its structural design needs to consider factors such as heat dissipation, sound insulation, waterproofing, and ease of maintenance. At the same time, the engine compartment is also connected to other parts of the vehicle body through various pipelines and wires to ensure the normal operation of the whole vehicle. Its layout and design directly affect the performance, reliability, and safety of the automobile and are the core of the vehicle's power system and many key functions. Therefore, the safety inside the engine compartment of an automobile is particularly important.

[0003] Existing technologies such as the invention with the publication number CN101869746B disclose an automobile fire extinguishing auxiliary device. This automobile fire extinguishing auxiliary device is arranged inside the engine compartment of an automobile. The auxiliary device includes a heat-resistant main pipe having an inlet end and an outlet end. The outlet end of the heat-resistant main pipe is connected to a plurality of heat-resistant branch pipes communicating with it, and spray heads are respectively connected to the outer ends of the heat-resistant branch pipes. The heat-resistant main pipe and the heat-resistant branch pipes are all located inside the engine compartment of the automobile, and the inlet end of the heat-resistant main pipe extends out of the vehicle body.

[0004] Currently, most fire extinguishing devices are equipped with internal pipelines. When a fire breaks out, an operator manually connects a fire extinguisher to the pipeline to carry out fire extinguishing operations on the engine compartment of the automobile. However, the operation process requires manual intervention and it is difficult to handle the fire in the initial stage, which poses certain potential safety hazards and needs to be improved. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks in the prior art that most fire extinguishing devices are equipped with internal pipelines. When a fire breaks out, an operator manually connects a fire extinguisher to the pipeline to carry out fire extinguishing operations on the engine compartment of the automobile. However, the operation process requires manual intervention and it is difficult to handle the fire in the initial stage, which poses certain potential safety hazards, and to propose an engine compartment fire extinguishing system for an automobile.

[0006] To achieve the above object, the present invention adopts the following technical solutions: An automotive engine compartment fire extinguishing system includes a vehicle body. A dry powder fire extinguisher is installed in the luggage compartment of the vehicle body. A transition joint is installed at the driving end of the dry powder fire extinguisher. A normally closed solenoid valve is installed at the end of the transition joint away from the dry powder fire extinguisher. A pipe joint is installed at the output end of the normally closed solenoid valve. A main pipe is installed at the end of the pipe joint away from the normally closed solenoid valve. A tee joint is installed at the end of the main pipe away from the pipe joint. Two output ends of the tee joint are respectively fixedly connected with a first branch pipe and a second branch pipe. A first spray head is fixedly connected to the end of the first branch pipe away from the tee joint. A second spray head is fixedly connected to the end of the second branch pipe away from the tee joint. The first spray head and the second spray head are both installed in the engine compartment of the vehicle body. First sensors and second sensors with the same structure are installed on both sides of the inner wall of the engine compartment, building an all-round fire monitoring network to conduct all-weather real-time monitoring of the environment in the engine compartment, effectively avoiding monitoring blind spots, ensuring that any smoke signal generated at any part can be captured in time, greatly improving the accuracy and reliability of fire monitoring, and winning precious time for subsequent fire extinguishing operations. In the initial stage of a fire, this solution can spray and extinguish the fire at the ignition point, effectively avoiding the spread of the fire and improving the safety of the vehicle.

[0007] Preferably, a first sensor is installed in the engine compartment of the vehicle body, and a second sensor is installed in the engine compartment of the vehicle body. A controller is detachably installed on the surface of the dry powder fire extinguisher. The signal input end of the controller is electrically connected with a feedback cable. One end of the feedback cable away from the controller is electrically connected with the signal output end of the first sensor, and one end of the feedback cable away from the controller is electrically connected with the signal output end of the second sensor. The output end of the controller is electrically connected with a connection cable. One end of the connection cable away from the controller is electrically connected with the input end of the normally closed solenoid valve. The feedback cable is installed on the vehicle body through a cable tie and is wrapped with a heat insulation protective sleeve on the outside, which can effectively resist harsh environments such as high temperature and flame in the engine compartment, ensure that the fire signal is not interfered or interrupted during transmission, and can be stably and timely transmitted to the controller, ensuring that the control system can respond quickly.

[0008] Preferably, the first sensor and the second sensor are respectively located on both sides of the inner wall of the engine compartment of the vehicle body. The first sensor and the second sensor have the same structure. After receiving the fire signal, the controller can quickly analyze and process the information, generate a control command in a short time, and open the normally closed solenoid valve, so that the dry powder fire extinguisher quickly enters the working state. This fast response mechanism greatly shortens the time interval from discovering the fire to implementing fire extinguishing, effectively curbing the spread of the fire.

[0009] Preferably, the first nozzle and the second nozzle are respectively located on both sides of the inner wall of the vehicle body engine compartment. The first nozzle and the second nozzle have the same structure. Two first branch pipes and second branch pipes made of metal, in cooperation with the nozzles of the same structure installed on both sides of the inner wall of the engine compartment, can evenly spray dry powder to all corners of the compartment, achieving all-round coverage of the fire source. Good high-temperature resistance and corrosion resistance ensure the stable transportation of dry powder by the pipeline in a high-temperature environment, ensuring efficient and thorough fire extinguishing operations and greatly improving the fire extinguishing success rate.

[0010] Preferably, after the first sensor and the second sensor detect the smoke signal, they transmit the fire signal to the controller through the feedback cable. The controller powers on to open the normally closed solenoid valve. The dry powder in the dry powder fire extinguisher passes through the main pipe, the three-way joint, the first branch pipe and the second branch pipe, and is sprayed out from the first nozzle and the second nozzle into the engine compartment to complete the fire extinguishing of the engine compartment.

[0011] Preferably, a storage groove is provided at the bottom of the vehicle body, and the main pipe is installed in the storage groove. Installing the main pipe in the storage groove at the bottom of the vehicle body makes clever use of the idle space at the bottom of the vehicle, avoiding occupying extra space inside the vehicle, ensuring the safety of the pipeline, maintaining the cleanliness and order of the interior space of the vehicle, and improving the space utilization rate.

[0012] Preferably, the dry powder fire extinguisher is of a detachable design. After the fire situation is responded to and the fire is eliminated, the dry powder fire extinguisher is removed and replaced. The dry powder fire extinguisher adopts a detachable design. After the fire extinguishing operation is completed, the staff can conveniently and quickly remove and replace it, ensuring that the fire extinguishing system is always in a standby state ready to be activated at any time, effectively reducing the difficulty and cost of equipment maintenance, and improving the sustainable usability of the fire extinguishing system.

[0013] Preferably, the feedback cable is installed on the vehicle body through a cable tie, and the outer layer of the feedback cable is wrapped with a heat insulation protective sleeve, effectively resisting the extremely high temperature of hundreds of degrees Celsius in the engine compartment and the possible direct burning of flames. During a fire, even if the surrounding environmental temperature rises sharply, the heat insulation protective sleeve can provide reliable protection for the feedback cable, ensuring that the fire signal is not interfered with or interrupted by high temperature and is transmitted to the controller stably and in a timely manner. This not only provides guarantee for the rapid response of the fire extinguishing system, but also avoids the delay of fire extinguishing operations caused by signal transmission failures at critical moments, greatly enhancing the reliability and safety of the entire fire extinguishing system.

[0014] Preferably, both the first nozzle and the second nozzle are made of metal. With its strong and durable characteristics, the metal nozzle can not only withstand the extreme temperature in the engine compartment, but also effectively resist the erosion of oil stains and chemical substances, ensuring that the nozzle always maintains a good working state.

[0015] Preferably, both the first branch pipe and the second branch pipe are metal pipes, which greatly improve the high temperature resistance and corrosion resistance of the pipeline. During a fire, the high temperature in the engine compartment will not soften or deform the metal pipes, ensuring the integrity of the pipeline structure and maintaining the normal transportation of dry powder. At the same time, the metal pipes can resist the erosion of common corrosive substances such as oil stains, acids and alkalis in the engine compartment, extend the service life of the pipeline, and reduce the maintenance cost and downtime caused by pipeline damage.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0017] 1. In the present invention, the first sensor and the second sensor with the same structure are installed on both sides of the inner wall of the engine compartment, building an all-round fire monitoring network to monitor the environment in the compartment all-weather and in real time, effectively avoiding monitoring blind spots, ensuring that any smoke signal generated can be captured in time, greatly improving the accuracy and reliability of fire monitoring, and winning precious time for subsequent fire extinguishing operations. In the initial stage of the fire, this solution can spray fire extinguishing on the ignition point, effectively avoiding the spread of the fire and improving the safety of the vehicle.

[0018] 2. In the present invention, the feedback cable is installed on the vehicle body through a cable tie and is wrapped with a heat insulation protective sleeve on the outside, which can effectively resist the harsh environments such as high temperature and flame in the engine compartment, ensure that the fire signal is not interfered or interrupted during transmission, and can be stably and timely transmitted to the controller, ensuring that the control system can respond quickly.

[0019] 3. In the present invention, after receiving the fire signal, the controller can quickly analyze and process the information, generate a control command within a short time, open the normally closed solenoid valve, and make the dry powder fire extinguisher quickly enter the working state. This fast response mechanism greatly shortens the time interval from discovering the fire to implementing fire extinguishing, and effectively curbs the spread of the fire.

[0020] 4. In the present invention, the two first branch pipes and the second branch pipes made of metal, together with the nozzles with the same structure installed on both sides of the inner wall of the engine compartment, can evenly spray the dry powder to all corners of the compartment, achieving all-round coverage of the fire source. The good high temperature resistance and corrosion resistance ensure that the pipeline can stably transport dry powder in a high temperature environment, ensuring that the fire extinguishing operation is efficient and thorough, and greatly improving the fire extinguishing success rate.

[0021] 5. In the present invention, the dry powder fire extinguisher adopts a detachable design. After the fire extinguishing operation is completed, the staff can conveniently and quickly remove and replace it, ensuring that the fire extinguishing system is always in a standby state that can be activated at any time, effectively reducing the difficulty and cost of equipment maintenance, and improving the sustainable usability of the fire extinguishing system.

[0022] 6. In the present invention, the main pipe is installed in the storage groove at the bottom of the vehicle body, making clever use of the idle space at the bottom of the vehicle, avoiding occupying additional space inside the vehicle, ensuring the safety of the pipeline, maintaining the cleanliness and order of the interior space of the vehicle, and improving the space utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. is a three-dimensional structural schematic diagram of a vehicle engine compartment fire extinguishing system proposed by the present invention;

[0024] Figure 2 In a vehicle engine compartment fire extinguishing system proposed by the present invention Figure 1 FIG. is a schematic structural diagram of part A;

[0025] Figure 3 FIG. is a top view structural schematic diagram of a vehicle engine compartment fire extinguishing system proposed by the present invention;

[0026] Figure 4 FIG. is a control logic diagram of a vehicle engine compartment fire extinguishing system proposed by the present invention.

[0027] LEGEND DESCRIPTION:

[0028] 1. Dry powder fire extinguisher; 2. Transition joint; 3. Normally closed solenoid valve; 4. Pipe joint; 5. Main pipe; 6. Controller; 7. Connecting cable; 8. Feedback cable; 9. Tee joint; 10. First branch pipe; 11. Second branch pipe; 12. Second spray head; 13. First spray head; 14. First sensor; 15. Second sensor; 16. Vehicle body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Please refer to Figures 1-4, the present invention provides a technical solution: an automotive engine compartment fire extinguishing system, including a vehicle body 16. A dry powder fire extinguisher 1 is installed in the luggage compartment of the vehicle body 16. A transition joint 2 is installed at the driving end of the dry powder fire extinguisher 1. One end of the transition joint 2 away from the dry powder fire extinguisher 1 is installed with a normally closed solenoid valve 3. The output end of the normally closed solenoid valve 3 is installed with a pipe joint 4. One end of the pipe joint 4 away from the normally closed solenoid valve 3 is installed with a main pipe 5. One end of the main pipe 5 away from the pipe joint 4 is installed with a tee joint 9. The two output ends of the tee joint 9 are respectively fixedly connected with a first branch pipe 10 and a second branch pipe 11. One end of the first branch pipe 10 away from the tee joint 9 is fixedly connected with a first spray head 13. One end of the second branch pipe 11 away from the tee joint 9 is fixedly connected with a second spray head 12. Both the first spray head 13 and the second spray head 12 are installed in the engine compartment of the vehicle body 16. First sensors 14 and second sensors 15 with the same structure are installed on both sides of the inner wall of the engine compartment, constructing an all-round fire monitoring network to monitor the environment in the engine compartment in real time all day long, effectively avoiding monitoring blind spots, ensuring that any smoke signal generated in any part can be captured in time, greatly improving the accuracy and reliability of fire monitoring, and winning precious time for subsequent fire extinguishing operations. In the initial stage of the fire, this solution can spray and extinguish the fire at the ignition point, effectively avoiding the spread of the fire and improving the safety of the vehicle.

[0030] Specifically, a first sensor 14 is installed in the engine compartment of the vehicle body 16, and a second sensor 15 is installed in the engine compartment of the vehicle body 16. A controller 6 is detachably installed on the surface of the dry powder fire extinguisher 1. The signal input end of the controller 6 is electrically connected with a feedback cable 8. One end of the feedback cable 8 away from the controller 6 is electrically connected with the signal output end of the first sensor 14, and one end of the feedback cable 8 away from the controller 6 is electrically connected with the signal output end of the second sensor 15. The output end of the controller 6 is electrically connected with a connection cable 7. One end of the connection cable 7 away from the controller 6 is electrically connected with the input end of the normally closed solenoid valve 3. The feedback cable 8 is installed on the vehicle body 16 through a cable tie and is wrapped with a heat insulation protection sleeve on the outer layer, which can effectively resist harsh environments such as high temperature and flames in the engine compartment, ensure that the fire signal is not interfered or interrupted during transmission, and can be stably and timely transmitted to the controller 6 to ensure that the control system responds quickly.

[0031] Specifically, the first sensor 14 and the second sensor 15 are respectively located on both sides of the inner wall of the engine compartment of the vehicle body 16. The first sensor 14 and the second sensor 15 have the same structure. After receiving the fire signal, the controller 6 can quickly analyze and process the information, generate a control command within a short time, and open the normally closed solenoid valve 3, so that the dry powder fire extinguisher 1 quickly enters the working state. This fast response mechanism greatly shortens the time interval from discovering the fire to implementing the fire extinguishing, and effectively curbs the spread of the fire.

[0032] In this embodiment: The first nozzle 13 and the second nozzle 12 are respectively located on both sides of the inner wall of the engine compartment of the vehicle body 16. The first nozzle 13 and the second nozzle 12 have the same structure. The two first branch pipes 10 and second branch pipes 11 made of metal, in cooperation with the nozzles of the same structure installed on both sides of the inner wall of the engine compartment, can evenly spray dry powder to all corners of the compartment, achieving all-round coverage of the fire source. The good high-temperature resistance and corrosion resistance ensure the stable transportation of dry powder by the pipeline in a high-temperature environment, ensuring efficient and thorough fire extinguishing operations and greatly improving the fire extinguishing success rate.

[0033] Specifically, after the first sensor 14 and the second sensor 15 detect the smoke signal, they transmit the fire signal to the controller 6 through the feedback cable 8. The controller 6 supplies power to open the normally closed solenoid valve 3. The dry powder in the dry powder fire extinguisher 1 passes through the main pipe 5, the three-way joint 9, the first branch pipe 10 and the second branch pipe 11, and is ejected from the first nozzle 13 and the second nozzle 12 into the engine compartment to complete the fire extinguishing of the engine compartment.

[0034] Specifically, a storage groove is provided at the bottom of the vehicle body 16. The main pipe 5 is installed in the storage groove. The main pipe 5 is installed in the storage groove at the bottom of the vehicle body 16, making clever use of the idle space at the bottom of the vehicle, avoiding occupying extra space inside the vehicle, ensuring the safety of the pipeline, maintaining the cleanliness and order of the interior space of the vehicle, and improving the space utilization rate.

[0035] Specifically, the dry powder fire extinguisher 1 is of a detachable design. After the fire situation is responded to and the fire is eliminated, the dry powder fire extinguisher 1 is removed and replaced. The dry powder fire extinguisher 1 is of a detachable design. After the fire extinguishing operation is completed, the staff can conveniently and quickly remove and replace it, ensuring that the fire extinguishing system is always in a standby state ready to be activated at any time, effectively reducing the difficulty and cost of equipment maintenance, and improving the sustainable usability of the fire extinguishing system.

[0036] In this embodiment: The feedback cable 8 is installed on the vehicle body 16 through a cable tie, and the outer layer of the feedback cable 8 is wrapped with a heat insulation protective sleeve, effectively resisting the extremely high temperature of hundreds of degrees Celsius in the engine compartment and the possible direct burning of flames. During a fire, even if the surrounding environmental temperature rises sharply, the heat insulation protective sleeve can provide reliable protection for the feedback cable 8, ensuring that the fire signal is not interfered with or interrupted by high temperature and is stably and timely transmitted to the controller 6, not only providing guarantee for the rapid response of the fire extinguishing system, but also avoiding the delay of fire extinguishing operations caused by signal transmission failures at critical moments, greatly enhancing the reliability and safety of the entire fire extinguishing system.

[0037] Specifically, both the first nozzle 13 and the second nozzle 12 are made of metal. With its strong and durable characteristics, the metal nozzle can not only withstand the extreme temperature in the engine compartment, but also effectively resist the erosion of oil stains and chemical substances, ensuring that the nozzle always maintains a good working state.

[0038] Specifically, both the first branch pipe 10 and the second branch pipe 11 are metal pipes, which greatly improve the high-temperature resistance and corrosion resistance of the pipes. During a fire, the high temperature in the engine compartment will not soften or deform the metal pipes, ensuring the integrity of the pipe structure and maintaining the normal delivery of dry powder. At the same time, the metal pipes can resist the erosion of common corrosive substances such as oil stains, acids and alkalis in the engine compartment, extend the service life of the pipes, and reduce the maintenance costs and downtime caused by pipe damage.

[0039] Working principle: The first sensor 14 and the second sensor 15 installed on both sides of the inner wall of the engine compartment of the vehicle body 16 continuously monitor the environment in the engine compartment. These two sensors have the same structure and can sensitively capture smoke signals to achieve all-round and real-time monitoring of the fire in the engine compartment, effectively avoiding monitoring blind spots.

[0040] Once the first sensor 14 and the second sensor 15 detect a smoke signal, they immediately transmit the fire signal to the controller 6 installed on the surface of the dry powder fire extinguisher 1 through the feedback cable 8. The feedback cable 8 is installed on the vehicle body 16 through a cable tie, and its outer layer is wrapped with a heat insulation protective sleeve, which can effectively prevent damage to the cable caused by high temperature, flame, etc., ensuring that the fire signal can be transmitted stably and in a timely manner.

[0041] After receiving the fire signal, the controller 6 quickly analyzes and processes it, and then generates corresponding control instructions to send an opening signal to the normally closed solenoid valve 3.

[0042] The controller 6 is electrically connected to the input end of the normally closed solenoid valve 3 through the connection cable 7. After receiving the instruction, the normally closed solenoid valve 3 opens, opening a channel for the spraying of the dry powder in the dry powder fire extinguisher 1.

[0043] After the normally closed solenoid valve 3 is opened, the dry powder fire extinguisher 1, under the action of its own driving device, injects the stored dry powder into the main pipe 5 through the transition joint 2, the normally closed solenoid valve 3, and the pipe joint 4. The main pipe 5 is installed in the storage groove at the bottom of the vehicle body 16, which not only saves the vehicle interior space but also provides a certain degree of protection for the main pipe 5. The dry powder is transmitted to the tee joint 9 through the main pipe 5 and then enters the first branch pipe 10 and the second branch pipe 11 respectively. The first branch pipe 10 and the second branch pipe 11 are made of metal and have good high-temperature resistance and corrosion resistance, ensuring the smooth delivery of the dry powder.

[0044] The dry powder is ejected from the first nozzle 13 and the second nozzle 12 installed on both sides of the inner wall of the engine compartment through the first branch pipe 10 and the second branch pipe 11. The two nozzles have the same structure and can evenly spray the dry powder to various parts of the engine compartment to cover the fire source and quickly suppress the fire, completing the fire extinguishing operation.

[0045] The dry powder fire extinguisher 1 adopts a detachable design. After the fire situation is responded to and successfully resolved, the staff can conveniently remove the dry powder fire extinguisher 1 for replacement, ensuring that the fire extinguishing system is always in a state where it can be activated at any time, providing continuous protection for the fire safety of the vehicle engine compartment.

Claims

1. A fire extinguishing system for an automobile engine compartment, comprising a vehicle body (16), characterized in that: A dry powder fire extinguisher (1) is installed in the luggage compartment of the vehicle body (16); a transition joint (2) is installed at the driving end of the dry powder fire extinguisher (1); a normally closed solenoid valve (3) is installed at one end of the transition joint (2) away from the dry powder fire extinguisher (1); a pipe joint (4) is installed at the output end of the normally closed solenoid valve (3); a main pipe (5) is installed at one end of the pipe joint (4) away from the normally closed solenoid valve (3); a three-way joint (9) is installed at one end of the main pipe (5) away from the pipe joint (4); two output ends of the three-way joint (9) are respectively fixedly connected to a first branch pipe (10) and a second branch pipe (11); one end of the first branch pipe (10) away from the three-way joint (9) is fixedly connected to a first nozzle (13); one end of the second branch pipe (11) away from the three-way joint (9) is fixedly connected to a second nozzle (12); and the first nozzle (13) and the second nozzle (12) are both installed in the engine compartment of the vehicle body (16).

2. The automobile engine compartment fire extinguishing system according to claim 1, characterized in that: A first sensor (14) is installed in the engine compartment of the vehicle body (16), a second sensor (15) is installed in the engine compartment of the vehicle body (16), a controller (6) is detachably installed on the surface of the dry powder fire extinguisher (1), a signal input end of the controller (6) is electrically connected to a feedback cable (8), an end of the feedback cable (8) away from the controller (6) is electrically connected to a signal output end of the first sensor (14), an end of the feedback cable (8) away from the controller (6) is electrically connected to a signal output end of the second sensor (15), an output end of the controller (6) is electrically connected to a connection cable (7), and an end of the connection cable (7) away from the controller (6) is electrically connected to an input end of a normally closed solenoid valve (3).

3. The automobile engine compartment fire extinguishing system according to claim 2, characterized in that: The first sensor (14) and the second sensor (15) are respectively located on two sides of the inner wall of the engine compartment of the vehicle body (16); the first sensor (14) and the second sensor (15) have the same structure.

4. The automobile engine compartment fire extinguishing system according to claim 1, characterized in that: The first nozzle (13) and the second nozzle (12) are respectively located on two sides of the inner wall of the engine compartment of the vehicle body (16); the first nozzle (13) and the second nozzle (12) have the same structure.

5. The automobile engine compartment fire extinguishing system according to claim 2, characterized in that: After the first sensor (14) and the second sensor (15) detect the smoke signal, the fire signal is transmitted to the controller (6) via the feedback cable (8). The controller (6) supplies power to open the normally closed solenoid valve (3), and the dry powder in the dry powder fire extinguisher (1) passes through the main pipe (5), the three-way joint (9), the first branch pipe (10) and the second branch pipe (11), and is sprayed from the first nozzle (13) and the second nozzle (12) into the engine compartment, thereby completing the fire extinguishing of the engine compartment.

6. The automobile engine compartment fire extinguishing system according to claim 1, characterized in that: The bottom of the vehicle body (16) is provided with a storage groove, and the main pipe (5) is installed in the storage groove.

7. The automobile engine compartment fire extinguishing system according to claim 1, characterized in that: The dry powder fire extinguisher (1) is designed to be detachable, and after the fire is responded to and extinguished, the dry powder fire extinguisher (1) is dismantled and replaced.

8. The automobile engine compartment fire extinguishing system according to claim 2, characterized in that: The feedback cable (8) is installed on the vehicle body (16) via a strap, and the outer layer of the feedback cable (8) is wrapped with a heat-insulating protective sheath.

9. The automobile engine compartment fire extinguishing system according to claim 1, characterized in that: The first nozzle (13) and the second nozzle (12) are both made of metal.

10. The automobile engine compartment fire extinguishing system according to claim 1, characterized in that: The first branch pipe (10) and the second branch pipe (11) are both metal pipes.

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