A backup power supply device and vehicle for an automatic fire extinguishing system

Abstract

This invention discloses a backup power supply device and vehicle for an automatic fire extinguishing system. The device includes: a charging circuit connected to a 24V DC power supply; a fire extinguishing bottle starting current supply circuit connected to the 24V DC power supply, the charging circuit, and the starting terminal of the fire extinguishing bottle in the automatic fire extinguishing system; an emergency switch connected to an optocoupler circuit, located between a discharge control circuit and the flame detection main control board of the automatic fire extinguishing system; a discharge control circuit connected to both the charging circuit and the fire extinguishing bottle control circuit; the flame detection main control board also connected to the opening switch of the fire extinguishing bottle in the automatic fire extinguishing system; and the fire extinguishing bottle control circuit also connected to the spraying terminal of the fire extinguishing bottle in the automatic fire extinguishing system. This invention, by utilizing backup energy storage to enable the automatic fire extinguishing system to obtain electrical energy when the vehicle cannot supply power, allows the automatic fire extinguishing bottle to be activated normally, spraying the extinguishing medium and achieving the fire extinguishing function, thereby improving vehicle safety.

Description

Technical Field

[0001] This invention belongs to the field of fire detection technology, specifically relating to a backup power supply device and vehicle for an automatic fire extinguishing system, and more particularly to a power start-up backup circuit for an automatic fire extinguishing system of a vehicle (such as a bus, coach, or other public vehicle), and a vehicle having the power start-up backup circuit for the automatic fire extinguishing system of the vehicle (such as a bus, coach, or other public vehicle). Background Technology

[0002] Automatic fire suppression systems are installed in the engine compartment and / or passenger compartment of vehicles (such as buses and coaches). These systems are powered by the vehicle's own power source (i.e., the vehicle's electrical system). If the vehicle's electrical system fails due to a fire, the automatic fire suppression system cannot be activated, thus preventing the rapid extinguishing of the fire and potentially leading to serious consequences.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned deficiencies by providing a backup power supply device and vehicle for an automatic fire extinguishing system. This solution addresses the problem that, because the vehicle's automatic fire extinguishing system is powered by the vehicle's power supply system, it cannot be activated when the power supply system fails due to a fire, thus preventing the system from quickly extinguishing the fire and potentially leading to serious consequences. The invention achieves this by incorporating a charging circuit, a fire extinguisher bottle starting current supply circuit, a discharge control circuit, an emergency switch optocoupler circuit, and a fire extinguisher bottle control circuit. This ensures that even when the vehicle cannot supply power to the automatic fire extinguishing system, it still receives electrical energy and can normally activate the fire extinguisher bottle to spray the extinguishing medium, thereby improving vehicle safety.

[0005] This invention provides a backup power supply device for an automatic fire extinguishing system, applied to an automatic fire extinguishing system in a vehicle. The backup power supply device includes: a charging circuit, a fire extinguisher bottle starting current supply circuit, a discharge control circuit, an emergency switch connected to an optocoupler circuit, and a fire extinguisher bottle control circuit. The charging circuit is connected to a 24V DC power supply. The fire extinguisher bottle starting current supply circuit is connected to the 24V DC power supply, the charging circuit, and the starting terminal of the fire extinguisher bottle in the automatic fire extinguishing system. The emergency switch connected to the optocoupler circuit is located between the discharge control circuit and the flame detection main control board of the automatic fire extinguishing system. The discharge control circuit is connected to both the charging circuit and the fire extinguisher bottle control circuit. The flame detection main control board is also connected to the opening switch of the fire extinguishing bottle in the automatic fire extinguishing system; the fire extinguishing bottle control circuit is also connected to the spray end of the fire extinguishing bottle in the automatic fire extinguishing system; wherein, the charging circuit is used to charge and store energy using a 24V DC power supply when the vehicle can normally supply power to the automatic fire extinguishing system; the fire extinguishing bottle starting current supply circuit is used to form a current loop using a 24V DC power supply during the charging process of the charging circuit, generating an ampere-level current to provide starting current for the fire extinguishing bottle in the automatic fire extinguishing system; the discharge control circuit is used, on the one hand, to handle situations where the vehicle cannot normally supply power to the automatic fire extinguishing system and a discharge command is received. The energy stored during charging via the charging circuit is discharged to form a discharge circuit, driving the fire extinguisher bottle control circuit to activate the automatic fire extinguisher bottle spray. Conversely, when the vehicle is normally supplying power to the automatic fire extinguishing system and receives a discharge command, a voltage signal is provided to the emergency switch connected to the optocoupler circuit. This signal, in turn, triggers the fire extinguisher bottle control circuit via the interrupt pin of the flame detection main control board, activating the fire extinguisher bottle in the automatic fire extinguishing system to spray extinguishing media. The flame detection main control board includes a microcontroller. The emergency switch connected to the optocoupler circuit is used to provide a voltage signal to the flame detection main control circuit of the automatic fire extinguishing system when the discharge control circuit discharges and the emergency switch connected to the optocoupler circuit itself receives voltage. The board provides voltage to trigger a signal to the interrupt pin of the flame detection main control board of the automatic fire extinguishing system. The flame detection main control board is used to control the opening switch of the fire extinguishing bottle of the automatic fire extinguishing system to open when a flame is detected and the interrupt pin of the flame detection main control board of the automatic fire extinguishing system receives a trigger signal. The fire extinguishing bottle control circuit is used to control the fire extinguishing bottle of the automatic fire extinguishing system to start based on the starting current provided by the fire extinguishing bottle starting current supply circuit when the fire extinguishing bottle control circuit receives voltage and the opening switch of the fire extinguishing bottle in the automatic fire extinguishing system is opened, so that the spray end of the fire extinguishing bottle in the automatic fire extinguishing system sprays fire extinguishing medium for fire extinguishing within a set time.

[0006] In some embodiments, the charging circuit includes: a first diode module, a first resistor module, a second resistor module, a third resistor module, a first capacitor module, a second capacitor module, a third capacitor module, and the first diode module; wherein, a 24V DC power supply is connected to the input terminal of the charging circuit; the input terminal of the charging circuit is connected to the cathode of the first diode module; the anode of the first diode module is connected to the positive terminal of the first capacitor module, the second capacitor module, and the third capacitor module connected in parallel via the first resistor module; the negative terminal of the first capacitor module, the second capacitor module, and the third capacitor module connected in parallel is grounded via the second resistor module and the third resistor module, forming a charging loop.

[0007] In some embodiments, the fire extinguishing bottle starting current supply circuit includes: a fourth resistor module; the input terminal of the charging circuit is connected to the common terminal of the second resistor module and the third resistor module after passing through the fourth resistor module; wherein, while the 24V DC power supply is input to the charging circuit through the input terminal of the charging circuit, it also forms a current loop through the fourth resistor module, the third resistor module and ground to generate an ampere-level current to provide starting current for the fire extinguishing bottle in the automatic fire extinguishing system.

[0008] In some embodiments, the emergency switch connected to the optocoupler circuit includes: a first emergency resistor module, a second emergency resistor module, and an optocoupler module; wherein, the emergency output pin of the emergency switch connected to the optocoupler circuit is connected to the anode of the diode side of the optocoupler module via the first emergency resistor module; the cathode of the diode side of the optocoupler module is grounded; the collector of the transistor side of the optocoupler module is connected to the interrupt pin of the flame detection main control board; the 5V DC power supply is also connected to the interrupt pin of the flame detection main control board via the second emergency resistor module; and the emitter of the transistor side of the optocoupler module is grounded.

[0009] In some embodiments, the discharge control circuit includes: an emergency command sending module; the positive terminals of the first, second, and third capacitor modules connected in parallel are connected to the emergency output pin of the emergency switch-optocoupler circuit via the emergency command sending module; when the emergency command sending module is closed to send an emergency command, the positive terminals of the first, second, and third capacitor modules connected in parallel discharge through the emergency command sending module, the first emergency resistor module, and the optocoupler module to turn on the optocoupler module; at the instant the optocoupler module turns on, the level of the interrupt pin of the flame detection main control board changes as a trigger signal to control the opening switch of the fire extinguishing bottle of the automatic fire extinguishing system to open when a flame is detected and the interrupt pin of the flame detection main control board of the automatic fire extinguishing system receives a trigger signal.

[0010] In some embodiments, the discharge control circuit further includes: a fifth resistor module, a transistor module, and a second diode module; wherein, the common terminal of the emergency command sending module and the emergency switch connected to the optocoupler circuit's emergency output pin is connected to the emitter of the transistor module; the base of the transistor module is connected to the input terminal of the charging circuit via the fifth resistor module; the emitter of the transistor module is respectively connected to the fire extinguishing control pin of the fire extinguishing control circuit of each fire extinguishing bottle in the automatic fire extinguishing system; when the emergency command sending module is closed to send an emergency command, the positive terminals of the first capacitor module, the second capacitor module, and the third capacitor module connected in parallel discharge through the emergency command sending module and the transistor module, and the transistor module conducts to provide voltage to the fire extinguishing control pin of the fire extinguishing control circuit of each fire extinguishing bottle in the automatic fire extinguishing system.

[0011] In some embodiments, the automatic fire extinguishing system includes one or more fire extinguishing bottles. The fire extinguishing bottle control circuit for each fire extinguishing bottle has the same structure. Each fire extinguishing bottle control circuit's fire extinguishing bottle control pin controls the corresponding fire extinguishing bottle. Each fire extinguishing bottle control circuit includes: a sixth resistor module, a seventh resistor module, an eighth resistor module, a MOSFET module, a fuse module, and a third diode module. The emitter of the transistor module is connected to the gate of the MOSFET module via the sixth resistor module. A 24V DC power supply is connected to the gate of the MOSFET module via the seventh resistor module. The 24V DC power supply is also connected to the source of the MOSFET module. The drain of the MOSFET module is connected to the anode of the third transistor module. The cathode of the third transistor module is connected to the fire extinguishing bottle control pin of each fire extinguishing bottle control circuit via the fuse module and the eighth resistor module.

[0012] In some embodiments, in the automatic fire extinguishing system, the extinguishing medium of the nozzle of each fire extinguishing device is located at the bottom of the vehicle compartment.

[0013] In some embodiments, the extinguishing medium is heptafluoropropane gas or perfluorohexanone gas; and the outer surface of the automatic fire extinguishing system and the outer surface of the backup power supply device of the automatic fire extinguishing system are both provided with a flame-retardant layer.

[0014] In conjunction with the above-mentioned device, the present invention further provides a vehicle, including: a backup power supply device for the automatic fire extinguishing system described above.

[0015] Therefore, the solution of this invention, through an automatic fire extinguishing system for vehicles (such as buses, coaches, and other public vehicles), includes a charging circuit, a fire extinguisher bottle starting current supply circuit, a discharge control circuit, an emergency switch connected to an optocoupler circuit, and a fire extinguisher bottle control circuit. The charging circuit stores energy while the vehicle can normally supply power to the automatic fire extinguishing system. The fire extinguisher bottle starting current supply circuit forms a current loop during the charging process, generating an ampere-level current to provide starting current for the fire extinguishers in the automatic fire extinguishing system. The emergency switch connected to the optocoupler circuit controls the discharge control circuit to start when the vehicle cannot normally supply power to the automatic fire extinguishing system and a discharge command is received. The discharge control circuit, when activated, utilizes the energy obtained from the charging circuit. The system stores energy, discharges it to form a discharge circuit, and provides voltage to the flame detection control board of the automatic fire extinguishing system. This allows the flame detection control board to control the opening of the fire extinguishing bottle when a flame is detected. It also provides control voltage to the fire extinguishing bottle control circuit of the automatic fire extinguishing system. This allows the fire extinguishing bottle control circuit to control the opening of the fire extinguishing bottle based on the starting current, enabling the fire extinguishing bottle to quickly start and spray the extinguishing medium within a set time to achieve the fire extinguishing function. Therefore, by setting up a charging circuit, a fire extinguishing bottle starting current supply circuit, a discharge control circuit, an emergency switch optocoupler circuit, and a fire extinguishing bottle control circuit, the system ensures that even when the vehicle cannot supply power to the automatic fire extinguishing system, it can still obtain electrical energy and normally start the automatic fire extinguishing bottle to spray the extinguishing medium, thus achieving the fire extinguishing function and improving vehicle safety.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1This is a schematic diagram of a structure of an embodiment of the backup power supply device for the automatic fire extinguishing system of the present invention;

[0019] Figure 2 A schematic diagram of the structure of a power start-up backup circuit for an automatic fire extinguishing system of a vehicle (such as a bus, coach, or other public vehicle);

[0020] Figure 3 A schematic diagram of the structure of a specific embodiment of a power start-up backup circuit for an automatic fire extinguishing system of a vehicle (such as a bus, coach, or other public vehicle);

[0021] Figure 4 A schematic diagram of an embodiment of an emergency switch connected to an optocoupler circuit;

[0022] Figure 5 This is a schematic diagram of one embodiment of the control circuit for a fire extinguisher bottle, wherein (a) is a schematic diagram of the control circuit for the first fire extinguisher bottle, and (b) is a schematic diagram of the control circuit for the second fire extinguisher bottle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0024] Considering that the engine compartments of vehicles (such as buses and coaches) often use aerosol automatic fire suppression systems, but these systems only activate after the fire reaches a certain temperature, resulting in a long response time and inability to effectively extinguish fires in their early stages; in recent years, with the increase in fire-related casualties, automatic fire suppression systems for passenger compartments of vehicles (such as buses and coaches) have gradually become a research hotspot.

[0025] In the automatic fire suppression systems of passenger compartments of vehicles (such as buses and coaches), fire detection relies on smoke and heat sensors. These systems only activate when the fire reaches a certain intensity. Some systems also use visual cameras, but these systems are slow to react. For example, the automatic fire sprinkler system tested by Changchun Beida Automobile Company could cool and extinguish a fire in the passenger compartment within 30 seconds. However, a fire test conducted by Hangzhou Fire Department using a 43-seat King Long bus simulating a gasoline leak showed that the fire developed rapidly, igniting a raging inferno within 10 seconds and reducing 80% of the vehicle to ashes within 40 seconds. If the automatic fire suppression system has a slow response time, it may be effective in extinguishing small fires, but it cannot function properly against large fires or arson-induced explosions in terrorist attacks.

[0026] Therefore, the present invention proposes a backup power supply device for an automatic fire extinguishing system, specifically a power start-up backup circuit for an automatic fire extinguishing system of a vehicle (such as a bus, coach, or other public vehicle). Based on the matching relationship between the bridge resistance, starting current, starting time, and capacitor charging and discharging parameters of the automatic fire extinguishing cylinder in the automatic fire extinguishing system, through embedded hardware design and software programming, the function of the manual emergency switch button S6 is effectively integrated with the automatic fire extinguishing system, providing a power start-up backup circuit for the automatic fire extinguishing system. Even if the power supply in the vehicle's (such as a bus, coach, or other public vehicle) power supply system fails due to a fire, within 2 hours of the power failure, as long as the emergency switch button S6 of the power start-up backup circuit is pressed, the automatic fire extinguishing actuator of the automatic fire extinguishing cylinder in the automatic fire extinguishing system can still be activated to spray the fire extinguishing medium and extinguish the fire source. It also has the advantages of small size and low maintenance difficulty.

[0027] According to an embodiment of the present invention, a backup power supply device for an automatic fire extinguishing system is provided. See also... Figure 1 The diagram shows a structural schematic of an embodiment of the device of the present invention. This backup power supply device for an automatic fire extinguishing system is applied to a vehicle's automatic fire extinguishing system. The backup power supply device includes: a charging circuit, a fire extinguisher bottle starting current supply circuit, a discharge control circuit, an emergency switch connected to an optocoupler circuit, and a fire extinguisher bottle control circuit. The charging circuit is connected to a 24V DC power supply. The fire extinguisher bottle starting current supply circuit is connected to the 24V DC power supply, the charging circuit, and the starting terminal of the fire extinguisher bottle in the automatic fire extinguishing system. The emergency switch connected to the optocoupler circuit is located between the discharge control circuit and the flame detection main control board of the automatic fire extinguishing system. The discharge control circuit is connected to both the charging circuit and the fire extinguisher bottle control circuit. The flame detection main control board is also connected to the opening switch of the fire extinguisher bottle in the automatic fire extinguishing system. The fire extinguisher bottle control circuit is also connected to the spray terminal of the fire extinguisher bottle in the automatic fire extinguishing system.

[0028] The charging circuit is used to charge and store energy using a 24V DC power supply when the vehicle is able to supply power to the automatic fire extinguishing system normally.

[0029] The fire extinguishing bottle starting current supply circuit is used to form a current loop using a 24V DC power supply during the charging process of the charging circuit, generating an ampere-level current to provide starting current for the fire extinguishing bottles in the automatic fire extinguishing system.

[0030] The discharge control circuit serves two purposes. First, when the vehicle is unable to supply power to the automatic fire extinguishing system and a discharge command is received, it uses the stored energy from the charging circuit to discharge, forming a discharge circuit to drive the fire extinguishing bottle control circuit and activate the automatic fire extinguishing bottle spraying. Second, when the vehicle is supplying power to the automatic fire extinguishing system and a discharge command is received, it provides a voltage signal to the optocoupler circuit of the emergency switch, thereby triggering the fire extinguishing bottle control circuit through the interrupt pin of the flame detection main control board to activate the fire extinguishing bottle in the automatic fire extinguishing system to spray the extinguishing medium for fire extinguishing. The flame detection main control board includes a microcontroller.

[0031] The emergency switch connected to the optocoupler circuit is used to provide voltage to the flame detection main control board of the automatic fire extinguishing system when the discharge control circuit discharges and the emergency switch connected to the optocoupler circuit itself receives voltage, so that the interrupt pin of the flame detection main control board of the automatic fire extinguishing system receives a trigger signal.

[0032] The flame detection main control board is used to control the opening switch of the fire extinguishing bottle of the automatic fire extinguishing system to open when a flame is detected and a trigger signal is received at the interrupt pin of the flame detection main control board of the automatic fire extinguishing system.

[0033] The fire extinguishing bottle control circuit is used to control the fire extinguishing bottle in the automatic fire extinguishing system to start based on the starting current provided by the fire extinguishing bottle starting current supply circuit when the fire extinguishing bottle control circuit receives voltage and the opening switch of the fire extinguishing bottle in the automatic fire extinguishing system is turned on, so that the spray end of the fire extinguishing bottle in the automatic fire extinguishing system sprays fire extinguishing medium for fire extinguishing within a set time.

[0034] Specifically, Figure 2 This is a schematic diagram of the structure of a power start-up backup circuit for an automatic fire suppression system in a vehicle (such as a bus, coach, or other public vehicle). Figure 2As shown, the power start-up backup circuit of the automatic fire extinguishing system for vehicles (such as buses, coaches, and other public vehicles) includes: an RC energy storage circuit, an RC discharge circuit, a bridge resistor circuit, a transistor discharge circuit, an emergency switch connected to an optocoupler circuit, and power supply interfaces for the flame detection main control board and the automatic fire extinguishing bottle. The RC energy storage circuit is connected to the bridge resistor circuit. The bridge resistor circuit is connected to both the RC discharge circuit and the transistor discharge circuit. The emergency switch button S6 is connected to the emergency switch connected to an optocoupler circuit, which is connected to the transistor discharge circuit. The RC discharge circuit and the transistor discharge circuit are connected to the power supply interfaces for the flame detection main control board and the automatic fire extinguishing bottle, respectively.

[0035] In this invention, a power start-up backup circuit for an automatic fire extinguishing system (such as buses, coaches, and other public vehicles) is designed by rationally matching the bridge resistance of the bridge resistor circuit of the automatic fire extinguishing bottle in the automatic fire extinguishing system, as well as the starting current, starting time, and capacitor capacity of the RC energy storage circuit and RC discharge circuit. By calculating the RC charging and discharging time, the RC energy storage circuit and RC discharge circuit are designed to ensure that the power start-up backup circuit of the automatic fire extinguishing system (such as buses, coaches, and other public vehicles) completes charging within 2.0 seconds and enters standby mode, meeting the backup energy storage requirements and ensuring the high reliability of the automatic fire extinguishing bottle's start-up. Specifically, based on the capacitor's leakage coefficient and capacity, and the overall power consumption of the power start-up backup circuit of the automatic fire extinguishing system (such as buses, coaches, and other public vehicles), a capacitor energy storage and discharge control system is designed to ensure that within 2 hours of a power failure, pressing the emergency switch button S6 will drive the multiple fire extinguishing actuators in the automatic fire extinguishing system to spray extinguishing media and extinguish the fire. The emergency switch button S6 is used as a backup emergency button. In addition, the flame detection main control board adopts a high-precision and high-reliability active in-vehicle fire monitoring and automatic fire extinguishing system, which uses military-grade sensors and related technologies. The fire detection response sensitivity is less than 0.004 seconds, which can quickly, automatically, continuously and effectively extinguish fires, thereby effectively suppressing ordinary fires and deflagrations in the vehicle cabin.

[0036] In some embodiments, the charging circuit includes: a first diode module, a first resistor module, a second resistor module, a third resistor module, a first capacitor module, a second capacitor module, a third capacitor module, and a first diode module. The first resistor module may be a resistor R1, the second resistor module may be a resistor R2, the third resistor module may be a resistor R3, the first capacitor module may be a capacitor C1, the second capacitor module may be a capacitor C2, the third capacitor module may be a capacitor C3, and the first diode module may be a diode D1.

[0037] A 24V DC power supply is connected to the input terminal of the charging circuit. The input terminal of the charging circuit is connected to the cathode of the first diode module. The anode of the first diode module, after passing through the first resistor module, is connected to the positive terminal of the first, second, and third capacitor modules connected in parallel. The negative terminals of the first, second, and third capacitor modules connected in parallel, after passing through the second and third resistor modules, are grounded, forming a charging circuit.

[0038] Figure 3 This is a schematic diagram of a specific embodiment of a power start-up backup circuit for an automatic fire suppression system in a vehicle (such as a bus, coach, or other public vehicle). See also: Figure 3 In the example shown, the charging analysis of the power-on backup circuit is as follows: During charging, the 24V voltage passes through diode D1, resistor R1, capacitor C1, capacitor C2, capacitor C3, resistor R2, resistor R3, and GND to form a charging circuit, that is, to form an RC charging circuit to charge capacitors C1, C2, and C3.

[0039] In this circuit, capacitors C1, C2, and C3 are connected in parallel, which is equivalent to doubling the capacitance of the RC charging circuit. Therefore, the capacitance C of the charging capacitor in the RC charging circuit is: C = C1 + C2 + C3.

[0040] At any time t, the voltage across the charging capacitor in the RC charging circuit is:

[0041]

[0042] In formula (1), V t Let be the voltage across the charging capacitor at any given time, E be the charging limit across the charging capacitor, and RC be the RC charging time constant of the RC charging circuit.

[0043] The RC charging circuit has a resistance-capacitance charging time constant of RC. After 3 to 5 RC charging times, the voltage across capacitors C1, C2, and C3 is 24V.

[0044] For example: If capacitors C1, C2, and C3 are all 220uF capacitors, and resistor R1 is a 1kΩ resistor, then the RC charging time constant RC of the RC charging circuit is:

[0045] RC=(1×10 3 )×(220×3×10 -6 = 0.66s.

[0046] The charging time constant RC for 3-5 resistors / capacitors is 1.98-3.3 seconds, meaning that capacitors C1, C2, and C3 can be fully charged in 2 seconds, reaching a voltage of 24V across their terminals. If more energy is desired, the capacity of capacitors C1, C2, and C3 can be increased according to the power required to drive the fire extinguishers, but this will extend the charging time. Considering all factors, if the number of automatic fire extinguishers being driven is not large, it is unnecessary to choose capacitors C1, C2, and C3 with excessively high capacities.

[0047] In some embodiments, the fire extinguishing bottle starting current supply circuit includes a fourth resistor module, such as resistor R4. The input terminal of the charging circuit, after passing through the fourth resistor module, is connected to the common terminal of the second and third resistor modules. Simultaneously, a 24V DC power supply, while being input to the charging circuit through its input terminal, also forms a current loop through the fourth resistor module, the third resistor module, and ground, generating an ampere-level current to provide the starting current for the fire extinguishing bottle in the automatic fire extinguishing system.

[0048] In some embodiments, the emergency switch is connected to an optocoupler circuit, which includes: a first emergency resistor module, a second emergency resistor module, and an optocoupler module. The first emergency resistor module is such as resistor R109, the second emergency resistor module is such as resistor R110, and the optocoupler module is such as optocoupler U37.

[0049] The emergency switch is connected to the emergency output pin of the optocoupler circuit, and then connected to the anode of the diode side of the optocoupler module via the first emergency resistor module. The cathode of the diode side of the optocoupler module is grounded. The collector of the transistor side of the optocoupler module is connected to the interrupt pin of the flame detection main control board (such as the interrupt pin of a microcontroller). The 5V DC power supply is also connected to the interrupt pin of the flame detection main control board (such as the interrupt pin of a microcontroller) via the second emergency resistor module. The emitter of the transistor side of the optocoupler module is grounded.

[0050] Figure 4 This is a schematic diagram of an embodiment of an emergency switch connected to an optocoupler circuit. (See diagram below.) Figure 4 As shown, the emergency switch is connected to an optocoupler circuit, including resistors R109 and R110, and optocoupler U37. The emergency output pin, "Emergency," is connected to pin 1 of optocoupler U37 via resistor R109. Pins 2 and 3 of optocoupler U37 are both grounded. The 5V DC power supply is connected to pin 4 of optocoupler U37 via resistor R110. The common terminal of pin 4 of optocoupler U37 and resistor R110 is pin PB5, which leads to the microcontroller's interrupt interface.

[0051] In some embodiments, the discharge control circuit includes an emergency command transmission module, such as an emergency push-button switch S6. The positive terminals of the first capacitor module, the second capacitor module, and the third capacitor module, which are connected in parallel, are connected to the emergency output pin of the emergency switch optocoupler circuit via the emergency command transmission module.

[0052] When the emergency command sending module is closed to send an emergency command, the positive terminals of the first, second, and third capacitor modules connected in parallel discharge through the emergency command sending module, the first emergency resistor module, and the optocoupler module, thereby turning on the optocoupler module. At the instant the optocoupler module turns on, the level of the interrupt pin of the flame detection main control board changes, serving as a trigger signal. This triggers the opening switch of the fire extinguishing bottle in the automatic fire extinguishing system to open upon detecting a flame and receiving a trigger signal at the interrupt pin of the flame detection main control board.

[0053] In some embodiments, the discharge control circuit further includes: a fifth resistor module, a transistor module, and a second diode module, wherein the fifth resistor module is such as resistor R5, the transistor module is such as transistor Q1, and the second diode module is such as diode D2.

[0054] The common terminal of the emergency command sending module and the emergency switch optocoupler circuit is connected to the emitter of the transistor module. The base of the transistor module, via the fifth resistor module, is connected to the input terminal of the charging circuit. The emitter of the transistor module is connected to the fire extinguishing control pin of the fire extinguishing control circuit for each fire extinguishing cylinder in the automatic fire extinguishing system.

[0055] When the emergency command sending module is closed to send an emergency command, the positive terminals of the first, second, and third capacitor modules connected in parallel discharge through the emergency command sending module and the transistor module. The transistor module then conducts to provide voltage to the fire extinguishing control pin of the fire extinguishing control circuit of each fire extinguishing bottle in the automatic fire extinguishing system.

[0056] Specifically, see Figure 3The example shown illustrates the discharge analysis of the power-on backup circuit: 1) When the automatic fire extinguishing system is powered normally, pressing the emergency switch button S6 connects pin 1 of interface P8 to 24V (the normal power supply voltage of the automatic fire extinguishing system). Therefore, the voltage at point E is 24V, and the voltage at point F is: 24V (i.e., the voltage at point H) - the voltage drop across diode D2. Thus, transistor Q1 is not conducting. At this time, the 24V voltage passes through diode D1, resistor R1, capacitor C1, capacitor C2, capacitor C3, resistor R2, resistor R3, and GND, forming a charging circuit that continuously charges capacitors C1, C2, and C3. Simultaneously, the 24V voltage passes through point E, resistor R4, point G, resistor R3, and GND, forming a current loop and generating a current in the ampere range. For example, if the combined resistance of resistors R1, R2, and R3 is 22kΩ, the generated current is: 24 / (22×10). 3 = 1.09mA. See also Figure 3 and Figure 4 In the example shown, when the emergency switch button S6 is pressed, the RC discharge circuit generates a discharge loop: the electrical energy obtained from charging capacitors C1, C2, and C3 is discharged through point H, the emergency switch button S6, the emergency output pin (Emergency) connected to pin 3 of interface P8, resistor R109, and optocoupler U37, causing optocoupler U37 to conduct momentarily. At the moment optocoupler U37 conducts, the voltage on pin PB5 changes from high to low. Pin PB5 can be connected to the interrupt pin of the microcontroller. Once the interrupt is entered, the automatic fire extinguishing bottle can be started to spray the extinguishing medium through the program to achieve the fire extinguishing function.

[0057] Figure 5 This is a schematic diagram of one embodiment of a fire extinguisher control circuit, wherein (a) is a schematic diagram of the control circuit for a first fire extinguisher, and (b) is a schematic diagram of the control circuit for a second fire extinguisher. See also... Figure 3 , Figure 4 and Figure 5The example shown also includes the following discharge analysis of the power-on backup circuit: 2) When the automatic fire extinguishing system cannot be powered normally, the 24V DC power supply connected to pin 1 of interface P8 cannot provide voltage normally. At this time, when the emergency switch button S6 is pressed, the voltage across capacitors C1, C2, and C3 is: 24V - diode D1 voltage drop. The voltage at point F is: 24V (i.e., the voltage at point H) - diode D1 voltage drop - diode D2 voltage drop. The voltages at points G and E are equal and are both GND. Therefore, transistor Q1 is turned on. The voltages across capacitors C1, C2, and C3 are connected to the first fire extinguishing bottle control pin Fire-Extinguisher1 through pin 4 of interface P8, and to the second fire extinguishing bottle control pin Fire-Extinguisher2 through pin 5 of interface P8, thereby activating the automatic fire extinguishing bottle to spray the fire extinguishing medium and realize the fire extinguishing function.

[0058] In some embodiments, the automatic fire extinguishing system includes one or more fire extinguishing cylinders. The fire extinguishing cylinder control circuit for each cylinder has the same structure, and each control circuit's control pin controls the corresponding fire extinguishing cylinder. Each fire extinguishing cylinder control circuit includes: a sixth resistor module, a seventh resistor module, an eighth resistor module, a MOSFET module, a fuse module, and a third diode module. The sixth resistor module is, for example, resistor R6; the seventh resistor module is, for example, resistor R7; the eighth resistor module is, for example, resistor R8; the MOSFET module is, for example, MOSFET PFET1; the fuse module is, for example, fast reset fuse F1; and the third diode module is, for example, diode D3.

[0059] The emitter of the transistor module is connected to the gate of the MOSFET module via the sixth resistor module. A 24V DC power supply is connected to the gate of the MOSFET module via the seventh resistor module. The 24V DC power supply is also connected to the source of the MOSFET module. The drain of the MOSFET module is connected to the anode of the third transistor module. The cathode of the third transistor module is connected to the fire extinguisher control pin of each fire extinguisher control circuit via the fuse module and the eighth resistor module.

[0060] like Figure 3 The power-on backup circuit shown includes: Figure 2 The diagram shows an RC energy storage circuit, a bridge resistor circuit, an RC discharge circuit, and a transistor discharge circuit. (Example:) Figure 3As shown, the power-on backup circuit includes: capacitors C1, C2, and C3; resistors R1, R2, R3, R4, and R5; diodes D1 and D2; an emergency switch button S6; a transistor Q1; and an interface P8. Resistors R1, R2, R3, R4, and R5 form a bridge resistor circuit. Capacitors C1, C2, and C3, along with the emergency switch button S6, constitute an RC discharge circuit. Diode D2, transistor Q1, and resistor R5 constitute a transistor discharge circuit.

[0061] exist Figure 3 In the example shown, capacitors C1, C2, and C3 are connected in parallel, and the positive terminal of capacitor C1 is connected to point H. Point H is connected to the cathode of diode D1 via resistor R1, and the anode of diode D1 is connected to the 24V terminal of interface P8 (i.e., pin 1 of interface P8). The anode of diode D1 is also connected to point E. Point H is also connected to the first terminal of emergency switch button S6.

[0062] The negative terminal of capacitor C1 is connected to point G via resistor R2. Point G is then connected to the GND terminal of interface P8 (pin 2 of interface P8) via resistor R3. Point G is also connected to point E via resistor R4. Point E is connected to the base of transistor Q1 via resistor R5. The collector of transistor Q1 is connected to the control pin Fire-Extinguisher1 (pin 4 of interface P8) for the first fire extinguisher and the control pin Fire-Extinguisher2 (pin 5 of interface P8) for the second fire extinguisher on interface P8. The anode of diode D2 is connected to the second terminal of emergency switch button S6, which is also connected to the emergency output pin Emergency (pin 3 of interface P8) on interface P8.

[0063] Among them, interface P8 is the power supply interface for the power start-up backup circuit, the flame detection main control board, and the automatic fire extinguishing bottle. Pin 1 of interface P8 is connected to 24V, pin 2 of interface P8 is connected to GND, pin 3 of P8 is connected to the emergency output pin Emergency, pin 4 of interface P8 is connected to the control pin Fire-Extinguisher1 of the first fire extinguishing bottle, and pin 5 of interface P8 is connected to the control pin Fire-Extinguisher2 of the second fire extinguishing bottle.

[0064] like Figure 5 As shown, the fire extinguisher control circuit includes: resistors R6, R7, R8, R9, R10, and R11; MOSFETs PFET1 and PFET2; fast reset fuses F1 and F2; and diodes D3 and D4.

[0065] The control pin (Fire-Extinguisher1) of the first fire extinguisher bottle is connected to the gate (g) of the MOSFET PFET1 via resistor R6. The 24V DC power supply is connected to the gate (g) of the MOSFET PFET1 via resistor R7. The 24V DC power supply is also connected to the source (s) of the MOSFET PFET1. The drain (d) of the MOSFET PFET1 is connected to the anode (A) of diode D3. The cathode (K) of diode D3 is connected to the automatic fire extinguisher control pin of the first fire extinguisher bottle via fast-reset fuse F1 and resistor R8.

[0066] The control pin (Fire-Extinguisher2) of the second fire extinguisher is connected to the gate (g) of MOSFET PFET2 via resistor R9. The 24V DC power supply is connected to the gate (g) of MOSFET PFET2 via resistor R10. The 24V DC power supply is also connected to the source (s) of MOSFET PFET2. The drain (d) of MOSFET PFET2 is connected to the anode (A) of diode D4. The cathode (K) of diode D4 is connected to the automatic fire extinguisher control pin of the second fire extinguisher via fast-reset fuse F2 and resistor R11.

[0067] It is evident that regardless of whether the automatic fire extinguishing system is powered normally, it can guarantee the normal activation of the automatic fire extinguishing bottle to spray the extinguishing medium and achieve the fire extinguishing function. Specifically, when the automatic fire extinguishing bottle is activated by discharging the stored energy of capacitors C1, C2, and C3, the discharge time of capacitors C1, C2, and C3 can be calculated using the following formula:

[0068]

[0069] In formula (2), RC is the RC discharge constant, E is the voltage across capacitor C when it is fully charged, and V t Let C be the desired voltage value after capacitor C discharges. Assuming the driving current to activate the automatic fire extinguisher is 1 ampere and the internal resistance of the fire extinguisher is 5 ohms, then the voltage is: 5 ohms × 1 ampere = 5 volts. Therefore, the discharge time t required for the voltage across capacitors C1, C2, and C3 to drop to 5V is: t = 5 × (660 × 10⁻⁶)⁻¹⁰. -6 )×ln(24 / 5)=5.175ms. That is, capacitors C1, C2, and C3 can ensure the normal activation of the automatic fire extinguishing bottle to spray the extinguishing medium instantaneously (e.g., 5.175ms) and realize the fire extinguishing function.

[0070] See Figure 2 , Figure 3 , Figure 4 and Figure 5As illustrated in the example, in the solution of this invention, the power start-up backup circuit of the automatic fire extinguishing system for highly reliable vehicles (such as buses, coaches, and other public vehicles) is designed with an RC charging circuit by reasonably matching bridge resistors such as resistors R1, R2, R3, R4, and R5, and capacitors C1, C2, and C3. This ensures that the power start-up backup circuit of the vehicle's automatic fire extinguishing system completes charging within 2.0 seconds and enters a standby state, meeting the energy storage backup requirements. By reasonably matching capacitors C1, C2, and C3, the starting current of the automatic fire extinguishing bottle, and the internal resistance of the automatic fire extinguishing bottle, a capacitor energy storage discharge control system is designed. This ensures that the automatic fire extinguishing bottle is started normally instantaneously (e.g., 5.175ms) to spray the fire extinguishing medium, achieving the fire extinguishing function, and the start-up time is short. By reasonably matching the leakage coefficients and capacities of capacitors C1, C2, and C3, and considering the overall power consumption of the power start-up backup circuit of the vehicle's (such as buses, coaches, and other public vehicles) automatic fire extinguishing system, a capacitor energy storage and discharge control system is designed to ensure that within 2 hours after the vehicle's power fails, the automatic fire extinguishing bottle can be activated normally to spray the fire extinguishing medium by pressing the emergency switch button S6, thus achieving the fire extinguishing function.

[0071] In some embodiments, in the automatic fire suppression system, the extinguishing medium of the nozzle of each fire extinguisher bottle is located at the bottom of the vehicle's passenger compartment. In related solutions, the nozzles of the extinguishing devices in the passenger compartment's automatic fire suppression system are located on the roof, while flammable materials in the vehicle (such as buses, coaches, and other public vehicles) (such as the fabric of the seats) are located at the bottom of the passenger compartment, resulting in a long spray distance and poor fire suppression effect. In the solution of this invention, the extinguishing medium is stored at the bottom of the passenger compartment, which can quickly create a life-saving passage for passengers under the passenger compartment of the public vehicle, creating golden escape time.

[0072] In some embodiments, the extinguishing medium is heptafluoropropane gas or perfluorohexanone gas. Furthermore, the outer surface of the automatic fire extinguishing system and the outer surface of its backup power supply device both have a flame-retardant layer. In related solutions, liquid or solid powder extinguishing media are used. Public vehicles typically need to carry heavy extinguishing agent storage tanks, which consumes fuel and requires inspection and maintenance at most once a year, making maintenance a heavy burden. Moreover, in environments below -30°C (such as Harbin in winter), the liquid extinguishing agent in the storage tank becomes ineffective. In the solution of this invention, the extinguishing medium of the automatic fire extinguishing system is heptafluoropropane gas or perfluorohexanone gas, which can be maintenance-free for a certain period, such as at least 3 years, significantly reducing equipment maintenance costs. In addition, in the solution of the present invention, the automatic fire extinguishing system of the vehicle and the power start-up backup circuit of the automatic fire extinguishing system of the vehicle (such as buses, coaches and other public vehicles) are designed with flame retardant as a whole, such as by coating with flame retardant materials, to ensure that the circuit of the automatic fire extinguishing system is not burned within 5 minutes of being exposed to fire.

[0073] Extensive testing and verification have shown that the technical solution of this invention, through an automatic fire extinguishing system for vehicles (such as buses, coaches, and other public vehicles), includes a charging circuit, a fire extinguisher bottle starting current supply circuit, a discharge control circuit, an emergency switch connected to an optocoupler circuit, and a fire extinguisher bottle control circuit. The charging circuit stores energy while the vehicle can normally supply power to the automatic fire extinguishing system. The fire extinguisher bottle starting current supply circuit forms a current loop during the charging process, generating an ampere-level current to provide starting current for the fire extinguishers in the automatic fire extinguishing system. The emergency switch connected to the optocoupler circuit controls the discharge control circuit to start when the vehicle cannot normally supply power to the automatic fire extinguishing system and a discharge command is received. The discharge control circuit, when started, utilizes the charging current... The energy stored in the charging circuit is discharged to form a discharge circuit, providing voltage to the flame detection control board of the automatic fire extinguishing system. This allows the flame detection control board to control the opening of the fire extinguishing bottle when a flame is detected. It also provides control voltage to the fire extinguishing bottle control circuit of the automatic fire extinguishing system, enabling the fire extinguishing bottle to start rapidly based on the starting current when the fire extinguishing bottle is open. This allows the fire extinguishing bottle to quickly start and spray the extinguishing medium within a set time, achieving the fire extinguishing function. Therefore, by setting up a charging circuit, a fire extinguishing bottle starting current supply circuit, a discharge control circuit, an emergency switch optocoupler circuit, and a fire extinguishing bottle control circuit, the system ensures that even when the vehicle cannot supply power to the automatic fire extinguishing system, it can still obtain electrical energy and normally start the automatic fire extinguishing bottle to spray the extinguishing medium, achieving the fire extinguishing function and improving vehicle safety.

[0074] According to an embodiment of the present invention, a vehicle corresponding to a backup power supply device for an automatic fire suppression system is also provided. The vehicle may include: the backup power supply device for the automatic fire suppression system described above.

[0075] Since the processing and functions implemented by the vehicle in this embodiment are basically the same as those described above. Figure 1 The embodiments, principles, and examples of the device shown are as follows. Therefore, for any details not covered in the description of this embodiment, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0076] Extensive testing and verification have shown that the technical solution of this invention, through an automatic fire extinguishing system for vehicles (such as buses, coaches, and other public vehicles), includes a charging circuit, a fire extinguisher bottle starting current supply circuit, a discharge control circuit, an emergency switch connected to an optocoupler circuit, and a fire extinguisher bottle control circuit. The charging circuit stores energy when the vehicle can normally supply power to the automatic fire extinguishing system. The fire extinguisher bottle starting current supply circuit forms a current loop during the charging process, generating an ampere-level current to provide starting current for the fire extinguishers in the automatic fire extinguishing system. The emergency switch connected to the optocoupler circuit is used when the vehicle cannot normally supply power to the automatic fire extinguishing system and receives... Upon receiving a discharge command, the discharge control circuit is activated. This circuit, when activated, utilizes the stored energy from the charging circuit to discharge, forming a discharge circuit. It provides voltage to the flame detection main control board of the automatic fire extinguishing system, enabling the main control board to control the opening of the fire extinguishing bottle upon detecting a flame. It also provides control voltage to the fire extinguishing bottle control circuit of the automatic fire extinguishing system, allowing the fire extinguishing bottle to activate based on the starting current when the fire extinguishing bottle is activated. This ensures the fire extinguishing bottle quickly activates within a set time to spray extinguishing media, enabling rapid, automatic, continuous, and effective fire suppression, thereby effectively inhibiting ordinary fires and deflagrations within the vehicle cabin.

[0077] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous methods can be freely combined and superimposed.

[0078] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A backup power supply device for an automatic fire extinguishing system, characterized in that, An automatic fire extinguishing system for vehicles; the backup power supply device of the automatic fire extinguishing system includes: a charging circuit, a fire extinguisher bottle starting current supply circuit, a discharge control circuit, an emergency switch connected to an optocoupler circuit, and a fire extinguisher bottle control circuit; the charging circuit is connected to a 24V DC power supply; the fire extinguisher bottle starting current supply circuit is connected to the 24V DC power supply, the charging circuit, and the starting terminal of the fire extinguisher bottle in the automatic fire extinguishing system; the discharge control circuit is connected to both the charging circuit and the fire extinguisher bottle control circuit; the emergency switch connected to the optocoupler circuit is located between the discharge control circuit and the flame detection main control board of the automatic fire extinguishing system; the flame detection main control board is also connected to the opening switch of the fire extinguisher bottle in the automatic fire extinguishing system; the fire extinguisher bottle control circuit is also connected to the spray terminal of the fire extinguisher bottle in the automatic fire extinguishing system; wherein, The charging circuit is used to charge and store energy using a 24V DC power supply when the vehicle is able to supply power to the automatic fire extinguishing system normally. The fire extinguishing bottle starting current supply circuit is used to form a current loop using a 24V DC power supply during the charging process of the charging circuit, generating an ampere-level current to provide starting current for the fire extinguishing bottle in the automatic fire extinguishing system. The discharge control circuit serves two purposes. First, when the vehicle is unable to supply power to the automatic fire extinguishing system and a discharge command is received, it utilizes the stored energy from the charging circuit to discharge, forming a discharge circuit to drive the fire extinguishing bottle control circuit and activate the automatic fire extinguishing bottle spraying. Second, when the vehicle is supplying power to the automatic fire extinguishing system and a discharge command is received, it provides a voltage signal to the optocoupler circuit of the emergency switch, thereby triggering the fire extinguishing bottle control circuit through the interrupt pin of the flame detection main control board to activate the fire extinguishing bottle in the automatic fire extinguishing system to spray extinguishing media for fire extinguishing. The flame detection main control board includes a microcontroller. The emergency switch connected to the optocoupler circuit is used to provide voltage to the flame detection main control board of the automatic fire extinguishing system when the discharge control circuit discharges and the emergency switch connected to the optocoupler circuit itself receives voltage, so that the interrupt pin of the flame detection main control board of the automatic fire extinguishing system receives a trigger signal. The flame detection main control board is used to control the opening switch of the fire extinguishing bottle of the automatic fire extinguishing system to open when a flame is detected and a trigger signal is received at the interrupt pin of the flame detection main control board of the automatic fire extinguishing system. The fire extinguishing bottle control circuit is used to control the fire extinguishing bottle in the automatic fire extinguishing system to start based on the starting current provided by the fire extinguishing bottle starting current supply circuit when the fire extinguishing bottle control circuit receives voltage and the opening switch of the fire extinguishing bottle in the automatic fire extinguishing system is turned on, so that the spray end of the fire extinguishing bottle in the automatic fire extinguishing system sprays fire extinguishing medium for fire extinguishing within a set time.

2. The backup power supply device for the automatic fire extinguishing system according to claim 1, characterized in that, The charging circuit includes: a first diode module, a first resistor module, a second resistor module, a third resistor module, a first capacitor module, a second capacitor module, a third capacitor module, and a first diode module; wherein, A 24V DC power supply is connected to the input terminal of the charging circuit; the input terminal of the charging circuit is connected to the cathode of the first diode module; the anode of the first diode module is connected to the positive terminal of the first capacitor module, the second capacitor module, and the third capacitor module connected in parallel, after passing through the first resistor module; the negative terminal of the first capacitor module, the second capacitor module, and the third capacitor module connected in parallel is grounded after passing through the second resistor module and the third resistor module, forming a charging circuit.

3. The backup power supply device for the automatic fire extinguishing system according to claim 2, characterized in that, The fire extinguisher bottle starting current supply circuit includes: a fourth resistor module; the input terminal of the charging circuit is connected to the common terminal of the second resistor module and the third resistor module after passing through the fourth resistor module; The 24V DC power supply is input to the charging circuit through the input terminal of the charging circuit, and at the same time, it forms a current loop through the fourth resistor module, the third resistor module and ground to generate an ampere-level current, which provides the starting current for the fire extinguishing bottle in the automatic fire extinguishing system.

4. The backup power supply device for the automatic fire extinguishing system according to claim 2, characterized in that, The emergency switch connected to the optocoupler circuit includes: a first emergency resistor module, a second emergency resistor module, and an optocoupler module; wherein... The emergency switch is connected to the emergency output pin of the optocoupler circuit, and then connected to the anode of the diode side of the optocoupler module via the first emergency resistor module; the cathode of the diode side of the optocoupler module is grounded; the collector of the transistor side of the optocoupler module is connected to the interrupt pin of the flame detection main control board; the 5V DC power supply is also connected to the interrupt pin of the flame detection main control board via the second emergency resistor module; the emitter of the transistor side of the optocoupler module is grounded.

5. The backup power supply device for the automatic fire extinguishing system according to claim 4, characterized in that, The discharge control circuit includes: an emergency command sending module; the positive terminals of the first capacitor module, the second capacitor module, and the third capacitor module connected in parallel are connected to the emergency output pin of the emergency switch optocoupler circuit after passing through the emergency command sending module; When the emergency command sending module is closed to send an emergency command, the positive terminals of the first, second, and third capacitor modules connected in parallel discharge through the emergency command sending module, the first emergency resistor module, and the optocoupler module, thereby turning on the optocoupler module. At the instant the optocoupler module turns on, the level of the interrupt pin of the flame detection main control board changes, serving as a trigger signal. This triggers the opening switch of the fire extinguishing bottle in the automatic fire extinguishing system to open when a flame is detected and a trigger signal is received at the interrupt pin of the flame detection main control board of the automatic fire extinguishing system.

6. The backup power supply device for the automatic fire extinguishing system according to claim 5, characterized in that, The discharge control circuit further includes: a fifth resistor module, a transistor module, and a second diode module; wherein, The common terminal of the emergency output pin of the emergency command sending module and the emergency switch optocoupler circuit is connected to the emitter of the transistor module; the base of the transistor module is connected to the input terminal of the charging circuit via the fifth resistor module; the emitter of the transistor module is connected to the fire extinguishing control pin of the fire extinguishing control circuit of each fire extinguishing bottle in the automatic fire extinguishing system. When the emergency command sending module is closed to send an emergency command, the positive terminals of the first, second, and third capacitor modules connected in parallel discharge through the emergency command sending module and the transistor module. The transistor module then conducts to provide voltage to the fire extinguishing control pin of the fire extinguishing control circuit of each fire extinguishing bottle in the automatic fire extinguishing system.

7. The backup power supply device for the automatic fire extinguishing system according to claim 6, characterized in that, In the automatic fire extinguishing system, there is one or more fire extinguishing bottles. The fire extinguishing bottle control circuit of each fire extinguishing bottle has the same structure. The fire extinguishing bottle control pin of each fire extinguishing bottle control circuit controls the corresponding fire extinguishing bottle. Each of the fire extinguisher bottle control circuits includes: a sixth resistor module, a seventh resistor module, an eighth resistor module, a MOSFET module, a fuse module, and a third diode module; wherein, The emitter of the transistor module is connected to the gate of the MOS transistor module via the sixth resistor module; the 24V DC power supply is connected to the gate of the MOS transistor module via the seventh resistor module; the 24V DC power supply is also connected to the source of the MOS transistor module; the drain of the MOS transistor module is connected to the anode of the third diode module; the cathode of the third diode module is connected to the fire extinguisher control pin of each fire extinguisher control circuit via the fuse module and the eighth resistor module.

8. The backup power supply device for the automatic fire extinguishing system according to any one of claims 1 to 7, characterized in that, In the automatic fire extinguishing system, the extinguishing medium of the nozzle of each fire extinguishing device is located at the bottom of the vehicle's cargo compartment.

9. The backup power supply device for the automatic fire extinguishing system according to claim 8, characterized in that, The extinguishing medium is either heptafluoropropane gas or perfluorohexanone gas; and the outer surface of the automatic fire extinguishing system and the outer surface of the backup power supply device of the automatic fire extinguishing system both have a flame-retardant layer.

10. A vehicle, characterized in that, include: Backup power supply device for automatic fire extinguishing system as described in any one of claims 1 to 9.

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