A warning and fire extinguishing system for electrical distribution cabinets

Abstract

The present invention belongs to the technical field of fire warning and response of electrical distribution cabinets, and provides an early warning and fire extinguishing system for electrical distribution cabinets, and its technical scheme is as follows: receiving video data of the distribution cabinet and temperature data of key nodes in the distribution cabinet; meshing the three-dimensional model of the distribution cabinet, obtaining the internal temperature distribution of the model through thermoelectric coupling simulation, and obtaining each spatial node and corresponding temperature data based on the internal temperature distribution result of the model; comparing the temperature corresponding to each spatial node and the temperature of the key node with the set threshold value, if any temperature is greater than the set first threshold value, responding to the early warning control instruction; if the temperature is greater than the set second threshold value, sending a fire extinguishing instruction to the fire extinguishing execution subsystem, and executing the fire extinguishing. The fire extinguishing triggering timing is comprehensively judged, and the fire is extinguished in time on the basis of ensuring the safety of the lines inside the distribution cabinet.

Description

Technical Field

[0001] The present invention belongs to the technical field of fire warning and response for electrical distribution cabinets, and in particular relates to an early warning and fire extinguishing system and method for electrical distribution cabinets. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Fires in electrical distribution cabinets are the most serious safety accidents in distribution cabinets, and are directly related to the safety and smooth progress of our production and life. Therefore, how to prevent and deal with fires in distribution cabinets has become a focus of social attention.

[0004] The existing electrical distribution cabinets are mainly used to integrate and install different electrical equipment and switch circuits, and are widely used in indoor or outdoor power connection equipment scenarios. Due to long-term operation, they may age, overload, poor contact, heat or spark, and in severe cases, they may catch fire internally.

[0005] At present, most fire warnings for electrical distribution cabinets directly start fire extinguishing when the temperature inside the distribution cabinet is greater than the set threshold, ignoring the internal environment of the distribution cabinet itself and the impact of the internal environment of the distribution cabinet itself on fire extinguishing scheduling. In addition, how to ensure the effectiveness of fire extinguishing after a fire is also very important. At present, when arranging fire extinguishing devices, the improvement of fire extinguishing efficiency by the layout of the fire extinguishing device is not considered. Summary of the invention

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides an early warning and fire extinguishing system for an electrical distribution cabinet, which applies aerosol fire extinguishing in the electrical distribution cabinet, takes into account the internal environment of the electrical distribution cabinet itself, and combines the fitting of various spatial nodes and key nodes of the electrical distribution cabinet to comprehensively judge the fire extinguishing triggering timing, solves the current problem of the singleness of early warning, realizes reliable early warning, and promptly extinguishes the fire on the basis of ensuring the safety of the lines inside the distribution cabinet.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] The present invention provides an early warning and fire extinguishing system for an electrical distribution cabinet, comprising a controller, and a data detection module and a fire extinguishing execution module connected to the controller;

[0009] The data detection module includes a camera arranged in the power distribution cabinet and temperature sensors arranged at key nodes in the power distribution cabinet;

[0010] The controller is configured to perform:

[0011] Receive video data of the power distribution cabinet and temperature data of key nodes in the power distribution cabinet in real time;

[0012] A three-dimensional model of the power distribution cabinet is constructed based on the video data of the power distribution cabinet, and the three-dimensional model of the power distribution cabinet is meshed. The internal temperature distribution of the model is obtained through thermoelectric coupling simulation, and the temperature data corresponding to each spatial node is obtained based on the internal temperature distribution result of the model;

[0013] Compare the temperature corresponding to each spatial node and the temperature of the key node with the set threshold. If any temperature is greater than the set first threshold, respond to the early warning control instruction; if the temperatures are all greater than the set second threshold, send a fire extinguishing instruction to the fire extinguishing execution subsystem and execute fire extinguishing.

[0014] In some embodiments, the controller is configured to perform:

[0015] The historical key node temperature data in the distribution cabinet is used to fit the temperature data corresponding to each spatial node. The difference between the key node temperature data in the distribution cabinet and the corresponding key node temperature data in the spatial node is calculated, and the absolute value of the difference is accumulated. If the accumulated result is less than the set fitting threshold, the fitting is successful. The temperature data corresponding to each spatial node is predicted based on the model of the successfully fitted distribution cabinet.

[0016] In some embodiments, the key nodes in the distribution cabinet include switch position points or wiring points; switch position points include important circuit breakers, and wiring points include important parts of cables, circuit breaker terminals or output terminals in the cabinet.

[0017] In some embodiments, the fire extinguishing execution module includes multiple fire extinguishing devices, each of which is provided with one or more fire extinguishing cores, and includes a control unit, and a power supply unit, a communication unit and a circuit board connected to the control unit, wherein the circuit board is electrically connected to the multiple fire extinguishing cores, and the communication unit is connected to the controller.

[0018] In some embodiments, the fire extinguishing device includes a shell having a combustion chamber protruding from the shell, the combustion chamber cavity being used to accommodate one or more aerosol fire extinguishing cores, one end face of the cavity being open, and a nozzle being provided on the end face on the same side of the shell side wall as the opening.

[0019] In some embodiments, the fire extinguishing core uses potassium ion fire extinguishing agent.

[0020] In some embodiments, the controller is also connected to the Internet of Things platform, and a smoke sensor is built into the electrical distribution cabinet. When the smoke sensor is abnormal, the live video is pushed to the command center in real time through the Internet of Things technology 5G network.

[0021] In some embodiments, the number and location of the fire extinguishing devices are related to the size of the space in the electrical distribution cabinet and the coverage of the fire extinguishing core.

[0022] In some embodiments, the fire extinguishing device further comprises a thermal wire, a blind hole is arranged on the end face of the fire extinguishing agent, the thermal wire is embedded in the blind hole, and is led out through the jet hole of the fire extinguishing device during combustion, and the extended part serves as an external temperature sensing start sensor.

[0023] In some embodiments, the thermosensitive wires are laid out by optimizing the thermosensitive wires, and the optimizing the thermosensitive wires includes:

[0024] Obtain status information of key nodes in the power distribution cabinet;

[0025] Based on the status information of key nodes in the power distribution cabinet, calculate the status safety factor of key nodes in the power distribution cabinet;

[0026] The state safety factor of the key node in the power distribution cabinet is compared with the corresponding state safety factor of the key node in the set standard power distribution cabinet. If the corresponding state safety factor is greater than or equal to the state safety factor corresponding to the standard, the state is judged to be safe, otherwise the state is judged to be abnormal;

[0027] The status safety factors of key nodes in the power distribution cabinet are sorted, and the thermistor wires are sequentially laid out on relevant electrical components and electrical circuits whose safety factors are lower than the set threshold.

[0028] One or more of the above technical solutions have the following beneficial effects:

[0029] 1. In view of the current single and one-sided fire warning problems of electrical distribution cabinets, the present invention applies aerosol fire extinguishing to the electrical distribution cabinet, takes into account the internal environment of the electrical distribution cabinet itself, and combines the fitting of various spatial nodes and key nodes of the electrical distribution cabinet to comprehensively judge the fire extinguishing triggering timing, realize reliable early warning, and carry out fire extinguishing in time on the basis of ensuring the safety of the lines inside the distribution cabinet.

[0030] 2. When laying out the thermistor wires, the present invention takes into account the environment inside the electrical distribution cabinet. In order to ensure the effectiveness of fire extinguishing after a fire, the thermistor wires are designed for the key points where risks first appear in the internal environment of the distribution cabinet itself, and are laid out after optimization, which can ensure effective and timely fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0032] Figure 1A framework diagram of a fire extinguishing warning system applied to an electrical distribution cabinet in one or more embodiments of the present invention;

[0033] Figure 2 A schematic diagram of a fire extinguishing warning strategy applied to an electrical distribution cabinet in one or more embodiments of the present invention;

[0034] Figure 3 A schematic diagram of the overall structure of a fire extinguishing device according to one or more embodiments of the present invention;

[0035] Figure 4 A schematic diagram of the internal three-dimensional structure of a fire extinguishing device in one or more embodiments of the present invention;

[0036] Among them, 1-shell, 2-combustion chamber, 3-fire extinguishing core, 4-nozzle, 5-thermal sensitive wire. DETAILED DESCRIPTION

[0037] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] In the present invention, terms such as "connected" and "connection" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable; it can be directly connected or indirectly connected through an intermediate medium. Relevant scientific research or technical personnel in this field can determine the specific meaning of the above terms in the present invention according to specific circumstances, and they should not be understood as limiting the present invention.

[0040]

Fire control system overall

[0041] One or more embodiments of the present invention provide a warning and fire extinguishing system for an electrical distribution cabinet, such as Figure 1 As shown, it includes: a controller, and a data detection module and a fire extinguishing execution module connected to the controller;

[0042] The data detection module includes a camera installed in the power distribution cabinet and temperature sensors installed at key nodes in the power distribution cabinet, so as to obtain video and image data as well as temperature data and send them to the controller.

[0043] Specifically, the key nodes in the distribution cabinet include switch position nodes or wiring nodes; the switch position nodes here include relatively important circuit breakers, etc., and the wiring nodes include important parts of the cables, circuit breaker terminals or output terminals in the cabinet, etc. Once these key nodes become loose or have poor contact, the temperature will rise due to the continuous power supply of the distribution cabinet, which may easily damage the equipment or even cause a fire accident. Temperature sensors are installed at these key nodes for temperature detection.

[0044] The fire extinguishing execution module includes a plurality of fire extinguishing devices, each of which is provided with one or more fire extinguishing cores, and includes a control unit, and a power supply unit, a communication unit and a circuit board connected to the control unit, wherein the circuit board is electrically connected to the plurality of fire extinguishing cores. The power supply unit is used to supply power to the control unit. The communication unit is used to establish a communication connection between the control unit and the controller, and the connection may be a wireless connection or a wired connection, which is not specifically limited here.

[0045] In some embodiments, the controller is also connected to the Internet of Things platform, and a smoke sensor is built into the electrical distribution cabinet. When the sensor detects abnormalities such as high temperature smoke, it sends the on-site video to the Internet of Things platform. Specifically, through the Internet of Things technology 5G network, the on-site video is pushed to the command center in real time, and the system can be informed of the fire situation in the first place.

[0046] like Figure 2 As shown, the controller is configured to execute the following method:

[0047] Step 1: Receive video data of the power distribution cabinet and temperature data of key nodes in the power distribution cabinet in real time;

[0048] Step 2: Build a three-dimensional model of the distribution cabinet based on the video data of the distribution cabinet, mesh the three-dimensional model of the distribution cabinet, obtain the internal temperature distribution of the model through thermoelectric coupling simulation, and obtain each spatial node and the corresponding temperature data based on the internal temperature distribution result of the model;

[0049] The temperature data of key nodes in the power distribution cabinet are used to fit each spatial node and the corresponding temperature data. If the fitting deviation is less than the set threshold, the fitting is successful.

[0050] During the specific fitting, the temperature data of the key nodes in the distribution cabinet and the corresponding temperature data of the key nodes in the spatial nodes are calculated, and the absolute value of the difference is accumulated. If the accumulated result is greater than the set threshold, it means that there is an error in the prediction. If the accumulated result is less than the set threshold, it means that the data of each spatial node obtained by prediction is available, and the prediction is made based on the successfully fitted model.

[0051] Step 3: Compare the temperature corresponding to each spatial node and the temperature of the key node with the set threshold. If any temperature is greater than the set first threshold, respond to the early warning control instruction; if the temperatures are all greater than the set second threshold, send a fire extinguishing instruction to the fire extinguishing execution subsystem and execute the fire extinguishing.

[0052] In step 3, if any temperature is greater than the set first threshold, it means that the temperature value at this time is low. At this time, the video data of the power distribution cabinet is fed back to the management end. The management end determines whether there is a fire risk based on the video data, and manually controls and sends a fire extinguishing instruction. If there is no need for fire extinguishing, it will not be started. If there is a risk, an early warning command will be sent, and the fire extinguishing execution subsystem will be started to execute fire extinguishing;

[0053] When the temperatures are greater than a set second threshold, for example, reaching the ignition point of the thermal line, a fire extinguishing instruction is sent to the fire extinguishing execution subsystem to execute the fire extinguishing.

[0054] The system combines video image data and temperature sensor data to avoid directly initiating fire extinguishing based on the temperature inside the distribution cabinet being greater than a set threshold. At the same time, it takes into account the internal environment of the distribution cabinet itself, and combines the fitting of various spatial nodes and key nodes of the electrical distribution cabinet to comprehensively judge the triggering timing of fire extinguishing, thereby performing differentiated control and timely extinguishing fires while ensuring the safety of the lines inside the distribution cabinet.

[0055]

Fire extinguishing equipment

[0056] The number and location of the fire extinguishing device are related to the size of the space in the electrical distribution cabinet and the coverage of the fire extinguishing core. Assuming that the effective coverage area of ​​a fire extinguishing core is A and the space in the electrical distribution cabinet is V, the number of fire extinguishing cores required is V / A×k, where k is a redundancy factor, which is used to ensure that the number of fire extinguishing cores is sufficient to deal with fires in any situation in the electrical distribution cabinet.

[0057] Based on the number of fire extinguishing cores, at least two fire extinguishing devices are designed so that when a fire occurs, the fire extinguishing smoke can quickly fill the entire electrical distribution cabinet. To achieve the above purpose, at least two fire extinguishing devices can be evenly arranged from front to back on the side wall / top of the electrical distribution cabinet.

[0058] As a specific implementation method of fire extinguishing device, Figure 3 and Figure 4 As shown, the fire extinguishing device includes a shell 1 and an upper cover (the upper cover is not shown), the shell 1 is provided with a combustion chamber 2, the cavity of the combustion chamber 2 is used to accommodate one or more aerosol fire extinguishing cores 3, one end face of the cavity is open, and a nozzle 4 is provided on the side wall of the shell on the same side as the opening.

[0059] The lower surface of the housing is connected to a mounting portion, and the fire extinguishing device further comprises a control unit, and a circuit board, a communication unit and a power supply unit connected to the control unit, wherein the circuit board is electrically connected to the fire extinguishing core. The circuit board, the communication unit and the power supply unit are fixedly connected to the mounting portion.

[0060] In some embodiments, the fire extinguishing device also includes a thermistor 5. A blind hole is set on the end face of the fire extinguishing agent, and the thermistor is embedded in the blind hole. The jet hole of the fire extinguishing device is led out during combustion, and the extended part serves as an external temperature sensing starting sensor. In this embodiment, the starting temperature of the selected thermistor is above 176°C, and the extreme operating temperature inside the electrical distribution cabinet is around 70°C, so there is no need to worry about false start-up due to exposure to the sun.

[0061] Specifically, the actual deployment scheme is described as follows:

[0062] For electrical distribution cabinets with an internal space of less than 1.5 cubic meters, install a fire extinguishing device on each side of the cabinet. Tear off the double-sided adhesive protective sticker and stick it to the inner wall of the cabinet together with the magnet. The nozzle should face downward or in a direction where there is no equipment within 30 cm. The thermistor extension cord should be suspended across the position where a fire source may occur in the cabinet and fixed with a cable tie to complete the installation.

[0063] For electrical distribution cabinets with an internal space greater than 1.5 cubic meters, add a fire extinguishing device on both sides of the cabinet. Tear off the double-sided adhesive protective sticker and stick it to the inner wall of the cabinet together with the magnet. The nozzle faces downward or in a direction where there is no equipment within 30 cm. The thermistor extension cord is overhead across the position where a fire source may occur in the cabinet. The two extension cords need to be connected for about 1.5 cm and fixed with cable ties to complete the installation.

[0064] In this embodiment, when laying out the thermal sensitive wires, the environment inside the electrical distribution cabinet is taken into consideration. In order to ensure the effectiveness of fire extinguishing after a fire, this embodiment designs the thermal sensitive wires to be laid out after optimization, specifically including:

[0065] Step 1: Obtain the status information of key nodes in the power distribution cabinet;

[0066] In step 1, the key nodes in the power distribution cabinet include switch position points or wiring points, wherein the switch position points include circuit breakers, and the wiring points include important parts of cables, circuit breaker terminals or output terminals in the cabinet;

[0067] Obtain the spatial position coordinates of the switch position points and the wiring points in the power distribution cabinet, the electrical operation information of the switch position points, and the number of wiring points;

[0068] Step 2: Calculate the state safety factor of the key nodes in the power distribution cabinet based on the state information of the key nodes in the power distribution cabinet;

[0069] The calculation formula for the state safety factor of key nodes in the power distribution cabinet is:

[0070] ,

[0071] in, The spatial coordinates of the switch point distribution cabinet meet the coefficient, is the spatial coordinate conformity coefficient of the wiring point in the distribution cabinet, is the electrical operation information compliance coefficient of the switch position point, is the number of connection points conformity coefficient, λ 1 -λ 4 The weights corresponding to the set compliance coefficients.

[0072] Step 3: Compare the state safety factor of the key node in the power distribution cabinet with the corresponding state safety factor of the key node in the set standard power distribution cabinet. If the corresponding state safety factor is greater than or equal to the state safety factor corresponding to the standard, the state is judged to be safe, otherwise the state is judged to be abnormal;

[0073] Step 4: Sort the status safety factors of the key nodes in the power distribution cabinet in step 3, and lay the thermal sensitive wires in sequence on the relevant electrical components and electrical circuits whose safety factors are lower than the set threshold.

[0074]

Fire extinguishing core

[0075] The fire extinguishing core uses a safe and non-toxic potassium ion fire extinguishing agent, adopts the formula in the application number: "2023116834303", uses food-grade raw materials, and is safe and harmless to the human body.

[0076] The fire extinguishing principle is: the ionic potassium oxide released by the combustion of potassium ion fire extinguishing agent has a universal uniform effect, achieving full flooding coverage of the entire protection area, combining with flame free radicals when in contact with the fire source, repeatedly cutting off the flame free radical reaction chain, forming stable non-combustible products, and finally leading to the interruption of the flame chain, achieving the purpose of fire extinguishing without consuming the oxygen content of the environment. The gas released by the potassium ion fire extinguishing agent can be suspended in the protected room or shell for at least 30 minutes, effectively and continuously suppressing the expansion or re-ignition of the fire. In addition, the safe and non-toxic potassium ion fire extinguishing agent can cope with many types of fires, with a storage temperature of -60~+160℃ environment, not afraid of bumps and vibrations, solid storage, and will not start until it exceeds 410℃, and is released from solid to gaseous state. It is maintenance-free for ten years and is suitable for use as an automatic fire extinguishing agent for electrical distribution cabinets.

[0077] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. An early warning and fire extinguishing system for an electrical distribution cabinet, characterized in that: It includes a controller, and a data detection module and a fire extinguishing execution module connected to the controller; The data detection module includes a camera arranged in the power distribution cabinet and temperature sensors arranged at key nodes in the power distribution cabinet; The controller is configured to perform: Receive video data of the power distribution cabinet and temperature data of key nodes in the power distribution cabinet in real time; A three-dimensional model of the power distribution cabinet is constructed based on the video data of the power distribution cabinet, and the three-dimensional model of the power distribution cabinet is meshed. The internal temperature distribution of the model is obtained through thermoelectric coupling simulation, and the temperature data corresponding to each spatial node is obtained based on the internal temperature distribution result of the model; The temperature data of key nodes in the power distribution cabinet are used to fit each spatial node and the corresponding temperature data. If the fitting deviation is less than the set threshold, the fitting is successful. When fitting, the temperature data of the key nodes in the power distribution cabinet and the temperature data of the corresponding key nodes in the spatial nodes are calculated, and the absolute value of the difference is accumulated. If the accumulated result is greater than the set threshold, it means that there is an error in the prediction. If the accumulated result is less than the set threshold, it means that the data of each spatial node obtained by the prediction is available, and the prediction is made based on the successfully fitted model; Compare the temperature corresponding to each spatial node and the temperature of the key node with the set threshold. If any temperature is greater than the set first threshold, it means that the temperature value at this time is low. At this time, the video data of the power distribution cabinet is fed back to the management end. The management end determines whether there is a fire risk based on the video data, and manually controls and sends a fire extinguishing instruction. If there is no need for fire extinguishing, it will not be started. If there is a risk, an early warning command will be sent, and the fire extinguishing execution subsystem will be started to execute fire extinguishing; if the temperature is greater than the set second threshold, a fire extinguishing instruction will be sent to the fire extinguishing execution subsystem to execute fire extinguishing; The fire extinguishing execution module includes a plurality of fire extinguishing devices, each of which is provided with one or more fire extinguishing cores, and includes a control unit, and a power supply unit, a communication unit and a circuit board connected to the control unit, wherein the circuit board is electrically connected to the plurality of fire extinguishing cores, and the communication unit is connected to the controller; The fire extinguishing device also includes a heat-sensitive wire, a blind hole is provided on the end face of the fire extinguishing agent, the heat-sensitive wire is embedded in the blind hole, and is led out of the jet hole of the fire extinguishing device during combustion, and the extended part serves as an external temperature sensing start sensor; When the thermosensitive wires are laid out, the thermosensitive wires are laid out after optimization, and the optimization of the thermosensitive wires includes: Obtain status information of key nodes in the power distribution cabinet; The key nodes in the distribution cabinet include switch position points or wiring points; switch position points include important circuit breakers, and wiring points include important cable parts, circuit breaker terminals or output terminals in the cabinet; based on the state information of the key nodes in the distribution cabinet, the state safety factor of the key nodes in the distribution cabinet is calculated; the calculation formula of the state safety factor of the key nodes in the distribution cabinet is: y=x1λ1+x2λ2+x3λ3+x4λ4, Among them, x1 is the spatial position coordinate compliance coefficient of the switch position point in the distribution cabinet, x2 is the spatial position coordinate compliance coefficient of the wiring point in the distribution cabinet, x3 is the electrical operation information compliance coefficient of the switch position point, x4 is the number of wiring points compliance coefficient, and λ1-λ4 are the weights corresponding to the set compliance coefficients; The state safety factor of the key node in the power distribution cabinet is compared with the corresponding state safety factor of the key node in the set standard power distribution cabinet. If the corresponding state safety factor is greater than or equal to the state safety factor corresponding to the standard, the state is judged to be safe, otherwise the state is judged to be abnormal; The status safety factors of key nodes in the power distribution cabinet are sorted, and the thermistor wires are sequentially laid out on relevant electrical components and electrical circuits whose safety factors are lower than the set threshold.

2. A warning and fire extinguishing system for an electrical distribution cabinet as claimed in claim 1, characterized in that: The controller is configured to perform: The historical key node temperature data in the distribution cabinet is used to fit the temperature data corresponding to each spatial node. The difference between the key node temperature data in the distribution cabinet and the corresponding key node temperature data in the spatial node is calculated, and the absolute value of the difference is accumulated. If the accumulated result is less than the set fitting threshold, the fitting is successful. The temperature data corresponding to each spatial node is predicted based on the model of the successfully fitted distribution cabinet.

3. The early warning and fire extinguishing system for an electrical distribution cabinet according to claim 1, characterized in that: The key nodes in the distribution cabinet include switch position points or wiring points; switch position points include important circuit breakers, and wiring points include important parts of cables, circuit breaker terminals or output terminals in the cabinet.

4. The early warning and fire extinguishing system for an electrical distribution cabinet according to claim 1, characterized in that: The fire extinguishing device comprises a shell, a combustion chamber is protruding from the shell, the combustion chamber cavity is used to accommodate one or more aerosol fire extinguishing cores, one end face of the cavity is open, and a nozzle is provided on the end face of the shell side wall on the same side as the opening.

5. The early warning and fire extinguishing system for an electrical distribution cabinet as claimed in claim 4, characterized in that: The fire extinguishing core adopts potassium ion fire extinguishing agent.

6. The early warning and fire extinguishing system for an electrical distribution cabinet according to claim 1, characterized in that: The controller is also connected to the Internet of Things platform. A smoke sensor is built into the electrical distribution cabinet. When the smoke sensor is abnormal, the on-site video is pushed to the command center in real time through the Internet of Things technology 5G network.

7. The early warning and fire extinguishing system for an electrical distribution cabinet according to claim 1, characterized in that: The number and location of the fire extinguishing devices are related to the size of the space in the electrical distribution cabinet and the coverage of the fire extinguishing core.

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