Fire extinguishing device and method for electric vehicle charging shed

Abstract

The invention discloses an electric vehicle charging shed fire extinguishing device and method, and belongs to the field of fire extinguishing devices. Dividing the charging shed into a plurality of sub-areas along the length direction and numbering the sub-areas; a smoke sensor is mounted at the top of each sub-area; distributed optical fiber sensors are arranged above the charging position of the charging shed in the length direction of the charging shed; a flame detector is arranged in each sub-area above the charging position of the charging shed; one end of the infusion header pipe is communicated with the infusion mechanism, and the other end is communicated with the nozzle; the telescopic mechanism is arranged at the top of the charging shed, and the spray head is arranged below the telescopic mechanism, so that the control mechanism controls the telescopic mechanism to stretch out and draw back according to data transmitted by the smoke sensor, the distributed optical fiber sensor and the flame detector to drive the spray head to the fire generation sub-area to conduct fire extinguishing and then reset. The accuracy and timeliness of fire detection are improved through multi-sensor cooperative linkage monitoring, the telescopic mechanism drives the spray head to accurately position and extinguish fire, and the fire can be quickly extinguished.

Description

Technical Field

[0001] The present application relates to the technical field of fire extinguishing devices, and in particular to a fire extinguishing device and method for an electric vehicle charging shed. Background Art

[0002] With the increasing popularity of electric vehicles, centralized electric vehicle charging sheds have become an essential part of urban infrastructure. During the charging process, electric vehicles are prone to fire accidents due to various factors, such as battery aging, wiring faults, and poor charging equipment quality. Once a fire occurs, if it is not discovered and effectively extinguished in a timely manner, it can spread rapidly, not only burning a large number of electric vehicles and causing serious property damage, but also endangering the lives of nearby people. The frequent lithium battery charging fires in recent years have exposed the numerous adaptability flaws of traditional fire-fighting devices used in electric vehicle charging sheds, which urgently need to be addressed.

[0003] Existing fire extinguishing devices for electric vehicle charging sheds mostly follow the building fire protection standards and are not specifically designed for the open space characteristics of electric vehicle charging sheds, the unique mechanism of thermal runaway of lithium batteries, and the special protection needs of charging equipment. For example, some existing electric vehicle charging sheds only use a single fire monitoring method, such as relying solely on smoke sensors to monitor fires. However, smoke sensors may be interfered with by environmental factors (such as dust, water vapor, etc.), resulting in false alarms or failure to detect fires in a timely and accurate manner. In addition, when the initial stage of a fire is only manifested by an abnormally high temperature and no obvious smoke has been generated, the smoke sensor will not be able to function, and it is easy to miss the best time to extinguish the fire.

[0004] Some fire extinguishing systems are equipped with sprinklers and other fire extinguishing equipment, but the sprinklers are fixed in position and cannot be flexibly adjusted according to the specific location of the fire. In the case of a large charging carport divided into multiple areas, the fixed sprinklers are difficult to accurately cover the fire area, resulting in poor fire extinguishing effect and failure to extinguish the fire quickly and effectively. In summary, the existing electric vehicle charging carport fire extinguishing devices have deficiencies in the accuracy and timeliness of fire monitoring and the precision of fire extinguishing. Summary of the Invention

[0005] The embodiments of the present application provide an electric vehicle charging shed fire extinguishing device and method, which can solve the problems of the existing electric vehicle charging shed fire extinguishing devices in terms of accuracy, timeliness and precision of fire monitoring.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present invention is:

[0007] In a first aspect, an embodiment of the present invention provides a fire extinguishing device for an electric vehicle charging shed, comprising a smoke sensor, a distributed optical fiber sensor, a flame detector, an infusion mechanism, an infusion main pipe, a sprinkler head, a telescopic mechanism, and a control mechanism;

[0008] Divide the charging shed into multiple sub-areas along the length direction and number them;

[0009] A smoke sensor is installed on the top of each sub-area, and a plurality of smoke sensors are electrically connected to the control mechanism;

[0010] The distributed optical fiber sensor is arranged above the charging position of the charging shed along the length direction of the charging shed, the distributed optical fiber sensor is electrically connected to the control mechanism, and transmits the length of each sub-area and the corresponding length position information of the distributed optical fiber sensor to the control mechanism;

[0011] Above the charging position of the charging carport, a flame detector is provided in each sub-area position, and the flame detector is electrically connected to the control mechanism;

[0012] One end of the infusion main pipe is connected to the infusion mechanism, and the other end is connected to the nozzle;

[0013] The telescopic mechanism is arranged on the top of the charging carport and is electrically connected to the control mechanism. The nozzle is arranged below the telescopic mechanism, so that the control mechanism controls the telescopic mechanism to extend and retract according to the data transmitted by the smoke sensor, the distributed optical fiber sensor and the flame detector, and drives the nozzle to the fire occurrence sub-area to extinguish the fire and then reset.

[0014] In conjunction with the first aspect, in one possible implementation, the electric vehicle charging shed fire extinguishing device further includes an infrared thermal imaging camera;

[0015] The infrared thermal imaging camera is arranged on the top of the charging carport and is electrically connected to the control mechanism. It can obtain thermal image data in the charging carport in real time and transmit the thermal image data to the control mechanism.

[0016] In combination with the first aspect, in a possible implementation, the infusion mechanism includes an infusion structure, an infusion branch pipe, and a multi-way junction;

[0017] The infusion structure comprises at least two groups, the number of which is consistent with the number of diversion ports of the multi-way junction, and both are electrically connected to the control mechanism;

[0018] The number of the infusion branches is consistent with the number of the infusion structures, and one end of each infusion branch is connected to an infusion structure, and the other end is connected to a branch port of the multi-way junction;

[0019] The main port of the multi-way junction is connected to one end of the main infusion pipe;

[0020] Different types of fire extinguishing substances are placed in at least two groups of infusion structures.

[0021] In combination with the first aspect, in a possible implementation, the liquid infusion structure includes a first liquid tank, a first water pump, a liquid delivery pipe, a second liquid tank, a second water pump, a first liquid level gauge, and a second liquid level gauge;

[0022] The first liquid tank stores fire extinguishing material;

[0023] The first water pump is disposed in the first liquid tank;

[0024] One end of the liquid delivery pipe is connected to the first water pump, and the other end extends into the second liquid tank;

[0025] The second water pump is disposed in the second liquid tank;

[0026] One end of the infusion branch is connected to the second liquid tank;

[0027] The first liquid level gauge and the second liquid level gauge are arranged on the side wall of the second liquid tank, and the position of the first liquid level gauge is higher than that of the second liquid level gauge;

[0028] The first water pump, the second water pump, the first liquid level gauge and the second liquid level gauge are all electrically connected to the control mechanism.

[0029] In combination with the first aspect, in a possible implementation, the fire extinguishing substance is water or perfluorohexanone.

[0030] In combination with the first aspect, in a possible implementation, the telescopic mechanism includes a bracket, a slide rail, a drive motor, a screw rod, a screw rod nut, a base, and a spring;

[0031] The bracket is arranged along the length direction of the charging carport;

[0032] The slide rail is arranged along the length direction of the bracket;

[0033] The base is a block, with a fixing hole running through the length direction on the top and an infusion channel on the bottom, which is slidably arranged on the slide rail;

[0034] The screw rod is connected to the output shaft of the drive motor;

[0035] The screw nut is sleeved on the screw and fixed in the fixing hole;

[0036] The two ends of the spring are respectively fixed to the end surface of the slide rail and the side surface of the base and are in a compressed state;

[0037] The nozzle is arranged below the base;

[0038] One end of the main infusion pipe is communicated with the infusion channel.

[0039] In conjunction with the first aspect, in a possible implementation, the electric vehicle charging shed fire extinguishing device further includes a buckle mechanism;

[0040] The buckle mechanism includes a driving structure, a rotating shaft and a hook;

[0041] A mounting groove is provided on the side wall of the slide rail in each sub-area;

[0042] The driving structure is connected to the rotating shaft;

[0043] The rotating shaft is rotatably disposed in the mounting slot;

[0044] One end of the hook is sleeved and fixed on the rotating shaft;

[0045] A card slot is provided at a position of the telescopic mechanism corresponding to the card hook.

[0046] In a second aspect, an embodiment of the present invention provides a method for extinguishing a fire in an electric vehicle charging shed, based on the above-mentioned electric vehicle charging shed fire extinguishing device, comprising:

[0047] The smoke sensor obtains the smoke concentration data of each sub-area of ​​the charging carport, determines whether the smoke concentration data is abnormal, and if abnormal, sends a smoke fire signal to the control mechanism;

[0048] Obtaining temperature data of each sub-area through a distributed optical fiber sensor, determining whether the temperature data is abnormal, obtaining a flame signal of each sub-area through a flame detector, determining whether the flame signal is abnormal, and if both the temperature data and the flame signal are abnormal, issuing a temperature fire signal and transmitting it to the control mechanism;

[0049] When the control mechanism receives the smoke fire signal and / or the temperature fire signal, the control mechanism controls the telescopic mechanism to drive the sprinkler head to the fire occurrence sub-area;

[0050] The control mechanism controls the infusion mechanism to deliver the fire extinguishing substance to the sprinkler head through the infusion main pipe;

[0051] The smoke sensor obtains the smoke concentration data of each sub-area of ​​the charging carport, determines whether the smoke concentration data is normal, and if normal, transmits a smoke normal signal to the control mechanism;

[0052] Obtaining temperature data of each sub-area through a distributed optical fiber sensor to determine whether the temperature data is normal; obtaining a flame signal of each sub-area through a flame detector to determine whether the flame signal is normal; and if both the temperature data and the flame signal are normal, issuing a normal temperature signal to transmit to the control mechanism;

[0053] The control mechanism controls the infusion mechanism to close, and controls the telescopic mechanism to drive the nozzle to reset.

[0054] In conjunction with the second aspect, in one possible implementation, the control mechanism controls the infusion mechanism to deliver the fire extinguishing substance to the sprinkler head through the infusion main pipe, including:

[0055] The control mechanism controls the first infusion structure to deliver the first fire extinguishing substance to the multi-way junction through the infusion branch pipe, and delivers the first fire extinguishing substance to the nozzle through the infusion main pipe through the multi-way junction for a preset time;

[0056] Then the control mechanism controls the second infusion structure to deliver the second fire extinguishing substance to the multi-way junction through the infusion branch pipe, and delivers the second fire extinguishing substance to the nozzle through the infusion main pipe through the multi-way junction until the fire is extinguished.

[0057] In conjunction with the second aspect, in a possible implementation, the control mechanism controls the telescopic mechanism to drive the sprinkler head to the fire occurrence sub-area, including:

[0058] The control mechanism controls the driving motor to drive the screw to rotate, and the screw nut moves relative to the screw toward the fire occurrence sub-area;

[0059] The screw nut drives the base to slide along the slide rail to drive the sprinkler head to move. The spring first releases its elastic force and then is stretched. When the sprinkler head moves to the fire occurrence sub-area, the control mechanism controls the motor to stop working.

[0060] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0061] The electric vehicle charging shed fire extinguishing device provided in an embodiment of the present invention, after installation, uses a smoke sensor to obtain smoke concentration data for each sub-area of ​​the charging shed, determines whether the smoke concentration data is abnormal, and if so, transmits a smoke fire signal to a control mechanism. Distributed fiber optic sensors obtain temperature data for each sub-area, determine whether the temperature data is abnormal, and flame detectors obtain flame signals for each sub-area, determine whether the flame signals are abnormal. If both the temperature data and the flame signals are abnormal, a temperature fire signal is transmitted to the control mechanism. Upon receiving the smoke fire signal and / or the temperature fire signal, the control mechanism controls the telescopic mechanism to move the sprinkler head to the sub-area where the fire is occurring. The control mechanism controls the infusion mechanism to deliver fire extinguishing material to the sprinkler head via the main infusion pipe. Smoke sensors obtain smoke concentration data for each sub-area of ​​the charging shed, determine whether the smoke concentration data is normal, and if so, transmits a smoke normal signal to the control mechanism. Distributed fiber optic sensors obtain temperature data for each sub-area, determine whether the temperature data is normal, and flame detectors obtain flame signals for each sub-area, determine whether the flame signals are normal. If both the temperature data and the flame signals are normal, a temperature normal signal is transmitted to the control mechanism. The control mechanism controls the infusion mechanism to close, and controls the telescopic mechanism to drive the nozzle to reset.

[0062] The electric vehicle charging carport fire extinguishing device provided by the embodiment of the present invention uses a smoke sensor to monitor the smoke concentration of each sub-area in real time, a distributed optical fiber sensor to monitor the temperature of each sub-area and transmit the corresponding length position information to the control mechanism, and a flame detector to monitor the flame signal of each sub-area. When a fire occurs in a sub-area, the smoke sensor, the distributed optical fiber sensor and the flame detector detect abnormal data and transmit it to the control mechanism. The control mechanism controls the telescopic mechanism to extend and retract according to the data, driving the sprinkler head to the sub-area where the fire occurs, and the infusion mechanism delivers fire extinguishing substances to the sprinkler head through the infusion main pipe to extinguish the fire. After the fire is extinguished, the telescopic mechanism drives the sprinkler head to reset. The electric vehicle charging carport fire extinguishing device of the embodiment of the present application uses a variety of sensors to monitor the fire from different aspects (smoke, temperature, flame), and the control mechanism controls the telescopic mechanism and the infusion mechanism to work in coordination and linkage according to the monitoring data to achieve fire extinguishing. The coordinated linkage monitoring of multiple sensors improves the accuracy and timeliness of fire detection, and the telescopic mechanism drives the sprinkler head to accurately locate and extinguish the fire, which can quickly extinguish the fire, reduce losses, and reduce the cost of fire extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0064] Figure 1A schematic diagram of the structure of a fire extinguishing device for an electric vehicle charging shed provided in an embodiment of the present application;

[0065] Figure 2 A schematic structural diagram of the telescopic mechanism provided in an embodiment of the present application;

[0066] Figure 3 Schematic diagram of the control mechanism provided in the embodiment of the present application Figure 1 ;

[0067] Figure 4 Schematic diagram of the control mechanism provided in the embodiment of the present application Figure 2 ;

[0068] Figure 5 This is a flowchart of the fire extinguishing method for an electric vehicle charging shed provided in an embodiment of the present application.

[0069] Icons: 1-smoke sensor; 2-distributed fiber optic sensor; 3-infusion mechanism; 31-infusion structure; 311-first liquid tank; 312-first water pump; 313-liquid delivery pipe; 314-second liquid tank; 315-second water pump; 316-first liquid level gauge; 317-second liquid level gauge; 32-infusion branch pipe; 33-multi-way junction; 4-infusion main pipe; 5-sprinkler; 6-telescopic mechanism; 61-bracket; 62-slide rail; 63-drive motor; 64-screw; 65-screw nut; 66-base; 67-spring; 7-control mechanism; 70-box; 71-partition; 72-box door; 73-vertical plate; 74-display screen; 75-keyboard; 76-industrial computer; 77-PLC controller; 78-relay; 79-alarm; 8-infrared thermal imaging camera; 9-snap mechanism. DETAILED DESCRIPTION

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0071] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0072] Please refer to Figure 1 As shown, an embodiment of the present invention provides a fire extinguishing device for an electric vehicle charging shed, including a smoke sensor 1, a distributed optical fiber sensor 2, a flame detector, an infusion mechanism 3, an infusion main pipe 4, a nozzle 5, a telescopic mechanism 6 and a control mechanism 7.

[0073] The charging shed is divided into multiple sub-sections along its length and numbered. A smoke sensor 1 (sensitivity 0.1% obs / m) is installed at the top of each sub-section. Multiple smoke sensors 1 are electrically connected to a control mechanism 7. The smoke sensors 1 can obtain smoke concentration data for each sub-section of the charging shed, determine whether the smoke concentration data is abnormal, and sensitively detect temperature changes.

[0074] Distributed fiber optic sensors 2 are arranged along the length of the charging shed, above the charging station. These sensors are electrically connected to a control mechanism 7 and transmit information about the length of each sub-section and its corresponding length and position to the control mechanism 7. The distributed fiber optic sensors 2 acquire temperature data from each sub-section to determine if the temperature data is abnormal. The distributed fiber optic sensors 2 utilize an armored protective structure, are resistant to humidity levels greater than 95% and operate in temperatures ranging from -20°C to 80°C, and have a monitoring accuracy of ±0.5°C.

[0075] Above the charging area of ​​the charging carport, a flame detector is installed in each sub-area. The flame detector is electrically connected to the control mechanism 7. The flame detector can be a multi-spectral flame detector. The flame detector obtains the flame signal of each sub-area, determines whether the flame signal is abnormal, and accurately senses the smoke concentration.

[0076] One end of the main infusion pipe 4 is connected to the infusion mechanism 3, and the other end is connected to the sprinkler head 5. A telescopic mechanism 6 is located on the top of the charging carport and is electrically connected to a control mechanism 7. The sprinkler head 5 is located below the telescopic mechanism 6. The control mechanism 7 controls the telescopic mechanism 6 to extend and retract based on data transmitted by the smoke sensor 1, distributed fiber optic sensor 2, and flame detector, driving the sprinkler head 5 to the fire sub-zone for extinguishing and resetting.

[0077] The main infusion pipe 4 is a hose with a long length, which can move with the nozzle 5 when the nozzle 5 moves. The nozzle 5 can be a rotating nozzle 5, which can rotate quickly to cover the entire fire sub-area without dead angles.

[0078] like Figure 3 and Figure 4 As shown, the control mechanism 7 comprises a housing 70, a partition 71, a door 72, a riser 73, a display screen 74, a keyboard 75, an industrial computer 76, a PLC controller 77, a relay 78, and an alarm 79. Two partitions 71 are provided, positioned parallel to each other within the housing 70, dividing the housing 70 into three separate compartments. The industrial computer 76, the PLC controller 77, and the relay 78 are each placed in a separate compartment. The industrial computer 76 is electrically connected to the PLC controller 77, which in turn is electrically connected to the relay 78. The door 72 is located in front of the housing 70. The industrial computer 76 serves as the data processing and management center, monitoring and managing the overall system. The PLC controller 77 is responsible for receiving sensor signals and performing logical analysis and control. The relay 78 controls the start and stop of other devices according to the instructions of the PLC controller 77. Of course, multiple relays 78 can be provided within the housing 70.

[0079] Alarm 79 is mounted on the top of housing 70 and electrically connected to relay 78. Relay 78 acts as a switch in the control circuit. When PLC controller 77 detects an abnormality, such as a fire, based on received sensor signals, it activates relay 78. This triggers alarm 79 to emit an audible and visual alarm signal, alerting personnel and those around the carport to evacuate immediately, thus fulfilling the alarm function.

[0080] A vertical plate 73 is mounted on the front of the housing 70, and a display screen 74 and keyboard 75 are mounted on the vertical plate 73. Both the display screen 74 and keyboard 75 are electrically connected to an industrial computer 76. As the data processing and management core of the entire control mechanism 7, the industrial computer 76 is capable of comprehensively processing and analyzing all types of information collected by the system. The display screen 74 displays the system's operating status, parameter settings, fire alarm information, and other information, providing real-time viewing for operators. Operators can input commands into the industrial computer 76 via the keyboard 75, such as setting system parameters or querying historical data. After receiving the information input from the keyboard 75, the industrial computer 76 performs corresponding operations and processing based on the commands, achieving human-computer interaction.

[0081] The smoke sensor 1, the distributed optical fiber sensor 2 and the flame detector are all electrically connected to the PLC controller 77 in the control mechanism 7. The smoke sensor 1 is responsible for real-time monitoring of the smoke concentration in each sub-area. When an abnormal smoke concentration is detected, the signal will be transmitted to the PLC controller 77. After receiving the signal, the PLC controller 77 will process and judge it according to the preset program, and then control the action of other equipment. The distributed optical fiber sensor 2 can monitor information such as temperature along the length direction of the charging shed, and transmit the length of each sub-area and the corresponding length position information to the PLC controller 77 to determine which sub-area has an abnormal temperature and whether there is a fire hazard. The flame detector is used to detect the flame signal generated when a fire occurs. When a flame is detected, the signal will be transmitted to the PLC controller 77. The PLC controller 77 determines the sub-area where the fire occurs based on the signal and position of the flame detector, providing a basis for subsequent fire extinguishing operations.

[0082] Both the infusion mechanism 3 and the telescopic mechanism 6 are electrically connected to a relay 78 in the control mechanism 7. When the PLC controller 77 determines that a fire has occurred and requires extinguishing, it activates relay 78, which in turn activates the infusion mechanism 3, causing it to begin operating and deliver fire extinguishing material to the sprinkler head 5 via the main infusion pipe 4 for extinguishing the fire. After the PLC controller 77 determines the sub-zone where the fire is occurring based on data transmitted by the smoke sensor 1, the distributed fiber optic sensor 2, and the flame detector, it activates relay 78, which in turn controls the telescopic mechanism 6 to extend and retract, moving the sprinkler head 5 to the fire sub-zone for extinguishing the fire. Once extinguishing the fire, the PLC controller 77 resets the telescopic mechanism 6.

[0083] like Figure 5 As shown, the PLC controller 77 of the control mechanism 7 is also connected to the power management module of the charging power supply. When the control mechanism 7 receives a fire signal, the PLC controller 77 quickly cuts off the power supply of the charging pile in the charging carport through the power management module to prevent the fire from spreading.

[0084] Continue to refer to Figure 5As shown, the device of the embodiment of the present application also includes a data fusion cloud platform. After receiving the fire signal, the data fusion cloud platform integrates the smoke concentration, temperature, and flame signal light data and uploads it to the computer cloud. It quickly sends the on-site information to the management department, fire department, and electric vehicle owners, improving the linkage performance and adding the cloud platform function to transmit the on-site situation in real time, realizing smart firefighting. The data fusion cloud platform realizes real-time monitoring of multiple terminals (mobile phone app, PC terminal), and also supports historical fire situation backtracking and risk warning.

[0085] The PLC controller 77 has a built-in high-speed communication interface. The moment a fire signal is triggered, the power supply to the charging piles in the charging carport is cut off at millisecond speed, completely blocking the fire from spreading along the circuit. At the same time, the alarm 79 is activated synchronously, flashing a strong light and emitting a 65dB to 120dB alarm to remind people to evacuate. The data fusion cloud platform instantly integrates the fire scene information, uploads it to the cloud, and pushes it to the management department, fire department, and vehicle owner terminals, enabling real-time sharing among multiple parties, facilitating remote command and dispatch and emergency response, and greatly improving the efficiency of firefighting and rescue. Intelligent linkage is improved, achieving millisecond-level power outages and smart firefighting linkage.

[0086] The electric vehicle charging shed fire extinguishing device provided in an embodiment of the present invention is installed. Smoke sensor 1 obtains smoke concentration data for each sub-area of ​​the charging shed, determines whether the smoke concentration data is abnormal, and if so, transmits a smoke fire signal to control mechanism 7. Distributed fiber optic sensor 2 obtains temperature data for each sub-area, determines whether the temperature data is abnormal, and flame detector obtains flame signals for each sub-area, determines whether the flame signals are abnormal, and if both the temperature data and the flame signals are abnormal, transmits a temperature fire signal to control mechanism 7. When control mechanism 7 receives the smoke fire signal and / or the temperature fire signal, control mechanism 7 controls telescopic mechanism 6 to drive nozzle 5 to the sub-area where the fire occurs. Control mechanism 7 controls infusion mechanism 3 to deliver fire extinguishing material to nozzle 5 via infusion main 4. Smoke sensor 1 obtains smoke concentration data for each sub-area of ​​the charging shed, determines whether the smoke concentration data is normal, and if so, transmits a smoke normal signal to control mechanism 7. The distributed optical fiber sensor 2 acquires temperature data from each sub-zone and determines whether the temperature data is normal. The flame detector acquires the flame signal from each sub-zone and determines whether the flame signal is normal. If both the temperature data and the flame signal are normal, a temperature normal signal is transmitted to the control mechanism 7. The control mechanism 7 controls the infusion mechanism 3 to close and the telescopic mechanism 6 to drive the nozzle 5 to reset.

[0087] The electric vehicle charging carport fire extinguishing device provided by the embodiment of the present invention comprises a smoke sensor 1 that monitors the smoke concentration of each sub-area in real time, a distributed optical fiber sensor 2 that monitors the temperature of each sub-area and transmits the corresponding length and position information to the control mechanism 7, and a flame detector that monitors the flame signal of each sub-area. When a fire occurs in a sub-area, the smoke sensor 1, the distributed optical fiber sensor 2, and the flame detector detect abnormal data and transmit it to the control mechanism 7. The control mechanism 7 controls the telescopic mechanism 6 to extend and retract according to the data, driving the sprinkler 5 to the sub-area where the fire occurs. The infusion mechanism 3 delivers fire extinguishing substances to the sprinkler 5 through the infusion main pipe 4 to extinguish the fire. After the fire is extinguished, the telescopic mechanism 6 drives the sprinkler 5 to reset. The electric vehicle charging carport fire extinguishing device of the embodiment of the present application utilizes a variety of sensors to monitor the fire from different aspects (smoke, temperature, flame). The control mechanism 7 controls the telescopic mechanism 6 and the infusion mechanism 3 to work in a coordinated manner based on the monitoring data to extinguish the fire. The coordinated monitoring of multiple sensors improves the accuracy and timeliness of fire detection. The telescopic mechanism 6 drives the sprinkler 5 to accurately locate and extinguish the fire, which can quickly extinguish the fire, reduce losses, and reduce the cost of fire extinguishing.

[0088] The smoke sensor 1, distributed fiber optic sensor 2, flame detector, infusion mechanism 3, telescopic mechanism 6, and control mechanism 7 of this embodiment work together to shut off the charging carport within 50 milliseconds of confirming a fire signal. This system is 10 times more efficient than traditional systems (average response time > 500 milliseconds), effectively blocking the path of electrical fire spread. Through innovative technology integration and systematic optimization, the efficiency and reliability of lithium battery fire prevention and control have been significantly improved.

[0089] Furthermore, the car charging shed fire extinguishing device provided in the embodiment of the present application also includes an infrared thermal imaging camera 8 (resolution 640×480). The infrared thermal imaging camera 8 is arranged on the top of the charging shed and is electrically connected to the control mechanism 7. It can obtain thermal image data in the charging shed in real time and transmit the thermal image data to the control mechanism 7. Specifically, the infrared thermal imaging camera 8 is arranged in a corner of the top of the charging shed to ensure all-round and no dead angles, and to monitor the on-site situation in real time. The infrared thermal imaging camera 8 is electrically connected to the industrial computer 76 in the control mechanism 7. The thermal image data (resolution 640×480) acquired in real time by the infrared thermal imaging camera 8 needs to be processed by an image processing algorithm to identify abnormal temperature areas, such as local overheating of the battery or early fire, and complete real-time analysis of the thermal image.

[0090] The embodiment of the present application uses infrared thermal imaging technology to detect infrared radiation emitted by objects to obtain thermal images, thereby reflecting the temperature distribution within the charging carport. The infrared thermal imaging camera 8 can penetrate visual obstacles and accurately locate the fire source, keeping the fire source positioning error within a very small range, thereby providing the control mechanism 7 with more information about the temperature distribution within the carport, further improving the accuracy of fire warnings and enabling the detection of potential high-temperature hazards in the early stages of a fire. The infrared thermal imaging camera 8, combined with the smoke sensor 1, the distributed fiber optic sensor 2, and the flame detector, achieves all-round, no-blind-angle real-time monitoring of the fire source within the charging carport.

[0091] The single threshold judgment method of the existing electric vehicle charging carport is easily affected by environmental changes and data fluctuations, resulting in a high false alarm rate. The charging carport fire extinguishing device of the embodiment of the present application, the entire fire extinguishing device is linked (such as triggered when the temperature is ≥150°C and the CO concentration is >200ppm) and is based on the early warning mechanism of the dynamic threshold algorithm (the core of the dynamic threshold algorithm is to dynamically adjust the early warning threshold according to the statistical characteristics and historical information of the real-time data). An intelligent algorithm is used to construct a dynamic early warning threshold model, and the operation is controlled by the industrial computer 76. The model comprehensively considers multi-dimensional variables such as working condition fluctuations and environmental parameters (such as seasonal changes, test load changes), and optimizes the alarm boundaries of key indicators such as temperature and pressure in real time. Through the adaptive threshold adjustment mechanism, the limitations of the fixed threshold system are effectively eliminated and the false alarm rate is significantly reduced. By replacing the traditional single threshold judgment with a dynamic threshold algorithm, the false alarm rate is reduced from 18% to below 2%, which can effectively prevent false start-ups and thus reduce the error rate.

[0092] Optionally, the infusion mechanism 3 includes an infusion structure 31, infusion branches 32, and a multi-way manifold 33. The infusion structure 31 includes at least two groups, the number of which matches the number of branch ports on the multi-way manifold 33, and both groups are electrically connected to the control mechanism 7. The number of infusion branches 32 matches the number of infusion structures 31. Each infusion branch 32 is connected to an infusion structure 31 at one end and to a branch port on the multi-way manifold 33 at the other end. The main port of the multi-way manifold 33 is connected to one end of the main infusion pipe 4. Different types of fire extinguishing substances are placed in the at least two groups of infusion structures 31.

[0093] In practice, control mechanism 7 controls the operation of different infusion structures 31 according to the fire situation. Fire extinguishing substances within infusion structures 31 are delivered via branch infusion pipes 32 to multi-way junctions 33, and then via main infusion pipe 4 to nozzles 5. By providing multiple infusion structures 31, different types of fire extinguishing substances can be placed, allowing for the use of different extinguishing substances in different phases, depending on the stage and characteristics of a fire. This improves fire extinguishing effectiveness, reduces fire damage, and lowers firefighting costs.

[0094] Furthermore, the liquid infusion structure 31 includes a first liquid tank 311, a first water pump 312, a liquid supply pipe 313, a second liquid tank 314, a second water pump 315, a first liquid level gauge 316, and a second liquid level gauge 317. The first liquid tank 311 stores fire extinguishing material. The first water pump 312 is disposed within the first liquid tank 311. One end of the liquid supply pipe 313 is connected to the first water pump 312, and the other end extends into the second liquid tank 314. The second water pump 315 is disposed within the second liquid tank 314. One end of the liquid infusion branch pipe 32 is connected to the second liquid tank 314. The first liquid level gauge 316 and the second liquid level gauge 317 are disposed on the sidewall of the second liquid tank 314, with the first liquid level gauge 316 positioned higher than the second liquid level gauge 317. The first water pump 312, the second water pump 315, the first liquid level gauge 316, and the second liquid level gauge 317 are all electrically connected to the control mechanism 7.

[0095] In actual operation, the first liquid level gauge 316 and the second liquid level gauge 317 detect the liquid level in the second liquid tank 314. When the liquid level is lower than the position of the second liquid level gauge 317, the control mechanism 7 controls the first water pump 312 to work, and transports the fire extinguishing material in the first liquid tank 311 to the second liquid tank 314 through the liquid delivery pipe 313. When the liquid level is higher than the position of the first liquid level gauge 316, the control mechanism 7 controls the first water pump 312 to stop working. The second water pump 315 transports the fire extinguishing material in the second liquid tank 314 to the multi-way junction 33 through the infusion branch pipe 32. The infusion structure 31 provided in the embodiment of the present application uses a liquid level gauge to monitor the liquid level, realizes automatic control of the delivery of fire extinguishing material, ensures that there is enough fire extinguishing material in the second liquid tank 314, thereby ensuring the continuous supply of fire extinguishing material and avoiding fire extinguishing failure due to insufficient fire extinguishing material.

[0096] Optionally, the fire extinguishing substance is water or perfluorohexanone (with a concentration of 6%). In practice, different fire extinguishing substances have different fire extinguishing properties. The fire extinguishing substance in the embodiment of the present application is water or perfluorohexanone. Water is placed in the first infusion structure 31, and perfluorohexanone is placed in the second infusion structure 31. The control mechanism 7 controls the first infusion structure 31 to deliver water to the multi-way junction 33 through the infusion branch 32, and then delivers the water to the nozzle 5 through the infusion main pipe 4 through the multi-way junction 33 for a preset time. After that, the control mechanism 7 controls the second infusion structure 31 to deliver perfluorohexanone to the multi-way junction 33 through the infusion branch 32, and then delivers the perfluorohexanone to the nozzle 5 through the infusion main pipe 4 through the multi-way junction 33 until the fire is extinguished. Fine water mist is used to quickly cool the fire sub-area, reducing the fire temperature by 60% within 3 seconds. Perfluorohexanone inhibits the thermal runaway chain reaction of lithium batteries through chemical interruption reactions, reducing the re-ignition rate from 61% to below 5%. Different fire extinguishing substances can be used in stages according to the development stage and characteristics of the fire to improve the fire extinguishing effect, reduce fire losses and lower the re-ignition rate.

[0097] The fire extinguishing efficiency of the device in this application embodiment is over 60% higher than that of traditional devices, significantly shortening fire fighting time. Furthermore, the device uses a synergistic spray of high-pressure water mist and perfluorohexanone to evenly cover the fire source at a specific speed and flow rate, quickly isolating oxygen and reducing the temperature, effectively suppressing thermal runaway reactions within the battery. This reduces the re-ignition rate of lithium battery fires from 61% with traditional fire extinguishing methods to below 5%, significantly improving fire extinguishing reliability.

[0098] Further, if Figure 2 As shown, the telescopic mechanism 6 includes a bracket 61, a slide rail 62, a drive motor 63, a screw 64, a screw nut 65, a base 66 and a spring 67. The bracket 61 is arranged along the length direction of the charging carport. The slide rail 62 is arranged along the length direction of the bracket 61. The base 66 is a block, with a fixing hole running through the length direction on the top and an infusion channel on the bottom, which is slidably arranged on the slide rail 62. The screw 64 is connected to the output shaft of the drive motor 63. The screw nut 65 is sleeved on the screw 64 and fixed in the fixing hole. The two ends of the spring 67 are respectively fixed to the end face of the slide rail 62 and the side of the base 66, and are in a compressed state. The nozzle 5 is arranged below the base 66. One end of the infusion main pipe 4 is connected to the infusion channel.

[0099] In actual operation, control mechanism 7 controls drive motor 63, which rotates screw 64. Screw nut 65 moves relative to screw 64, driving base 66 to slide along rail 62, thereby moving nozzle 5. During the movement of nozzle 5, spring 67 releases its elastic force and then stretches, assisting in the movement of nozzle 5.

[0100] Specifically, before the nozzle 5 moves, when the telescopic mechanism 6 is in its initial state, the spring 67 is compressed. The compressed spring 67 stores elastic potential energy. According to Hooke's law F = -kx (where F is the spring force of spring 67, k is the spring constant of spring 67, and x is the deformation of spring 67), the spring 67 generates an elastic force pointing in the direction of movement of the nozzle 5. When the drive motor 63 is activated, rotating the screw 64 and the screw nut 65 begins to move relative to the screw 64, the stored elastic potential energy of the spring 67 begins to be released. This elastic force acts as an auxiliary driving force, helping the base 66 to begin sliding on the slide rail 62. This reduces the initial resistance that must be overcome when the drive motor 63 is activated, making it easier for the nozzle 5 to begin moving. During the movement of the nozzle 5, as the nozzle 5 continues to move under the drive motor 63, the elastic force of the spring 67 changes. During the initial stage of movement of the nozzle 5, the compression of the spring 67 gradually decreases, and the elastic force gradually releases, continuously providing auxiliary power for the movement of the nozzle 5. After the spring 67 returns to its natural length, the spring 67 begins to be stretched as the nozzle 5 continues to move. During the stretching process of the spring 67, it will generate a pulling force opposite to the stretching direction. This pulling force is still consistent with the moving direction of the nozzle 5, and continues to provide auxiliary force for the movement of the nozzle 5. Moreover, during the entire movement process, the elastic force of the spring 67 can balance part of the vibration and impact force generated when the nozzle 5 moves, making the movement of the nozzle 5 more stable. When the nozzle 5 moves in the reverse direction, the drive motor 63 reverses to drive the screw 64 to rotate in the reverse direction, and the screw nut 65 moves in the reverse direction. At this time, the previously stretched state of the spring 67 begins to recover, and the elastic potential energy stored in it is released again, generating an elastic force consistent with the reverse movement direction of the nozzle 5. It can also assist the nozzle 5 to move in the reverse direction smoothly, reduce the resistance when the drive motor 63 starts in the reverse direction, and continue to balance the vibration and impact force during the reverse movement, ensuring the smooth reverse movement of the nozzle 5.

[0101] The telescopic mechanism 6 of the present embodiment utilizes a screw nut 65 to convert the motor's rotational motion into linear motion, thereby moving the nozzle 5. The spring 67 acts as a buffer and assists in movement, thereby enabling precise movement and positioning of the nozzle 5 (accurately locating the fire source within 15 seconds, with a positioning error of less than 10 cm), ensuring that the nozzle 5 can accurately reach the fire sub-zone for extinguishing the fire. Combined with the rotating nozzle 5 (rotating at 120 rpm), 360° coverage of the fire sub-zone is achieved, reducing the fire extinguishing blind spot from 42% to less than 5%, thereby achieving dynamic fire positioning and mobile jet fire extinguishing effects.

[0102] Furthermore, the electric vehicle charging carport fire extinguishing device also includes a latch mechanism 9. The latch mechanism 9 comprises a drive structure, a rotating shaft, and a latch hook. A mounting slot is provided on the sidewall of each sub-area slide rail 62. The drive structure is connected to the rotating shaft. The rotating shaft is rotatably mounted in the mounting slot. One end of the latch hook is secured to the rotating shaft. A latch slot is provided in the telescopic mechanism 6 at a position corresponding to the latch hook.

[0103] In practice, when the nozzle 5 moves to the fire zone, the control mechanism 7 controls the drive structure to rotate the shaft, causing the hook to move out of the mounting slot and into the slot of the telescopic mechanism 6. After the fire is extinguished, the drive structure drives the shaft to rotate in the opposite direction, causing the hook to disengage the slot and rotate back to the mounting slot without affecting the movement of the telescopic mechanism 6.

[0104] In the embodiment of the present application, the latch mechanism 9 secures the sprinkler head 5 when it reaches the fire sub-zone, preventing the sprinkler head 5 from shaking during the fire extinguishing process. This ensures the stability of the sprinkler head 5 during the fire extinguishing process and improves the fire extinguishing effect. Specifically, when the telescopic mechanism 6 includes a fixed base, a latching slot is provided on the fixed base, and the latching hook rotates out of the mounting slot and latches into the latching slot on the fixed base.

[0105] The ingenious design of the telescopic mechanism 6 allows the slide rail 62, base 66, and nozzle 5 to be flexibly customized and installed according to the size and shape of the carport, easily adapting to various carport layouts, whether long, square, or irregular. The snap mechanism 9 cooperates with the slot to precisely secure the nozzle 5 in place, meeting the firefighting needs of different areas, expanding the firefighting coverage by 30% and eliminating blind spots.

[0106] The embodiment of the present application innovatively integrates the intelligent system and the telescopic mechanism 6. The intelligent system realizes the rapid and accurate positioning and evaluation of potential fire sources by real-time monitoring of key indicators such as temperature and smoke in the electric carport; and the telescopic mechanism 6 flexibly adjusts the position of the nozzle 5 according to the instructions of the intelligent system to ensure that the fire extinguishing material can be accurately sprayed to the fire source. This collaborative working mode not only improves the efficiency of fire extinguishing, but also enhances the adaptability of the device to complex fire scenes. At the same time, the embodiment of the present application is specifically aimed at the particularity of lithium battery fires, ensuring that the thermal runaway reaction of lithium batteries can be quickly suppressed to prevent the spread of fire. Through the organic combination of intelligent monitoring, precise positioning, flexible movement and efficient fire extinguishing, the embodiment of the present application provides a comprehensive and reliable solution for fire prevention and control in electric vehicle charging carports.

[0107] The electric vehicle charging carport fire extinguishing device provided in the embodiment of the present invention further includes a video acquisition mechanism, such as a camera, which is electrically connected to the control mechanism 7 and transmits the acquired video data to the control mechanism 7.

[0108] Another embodiment of the present invention provides a method for extinguishing a fire in an electric vehicle charging shed, based on the above-mentioned electric vehicle charging shed fire extinguishing device, including steps 1 to 7, and the numbers after the steps do not represent the order of execution. Figure 5 shown.

[0109] Step 1: The smoke sensor 1 obtains the smoke concentration data of each sub-area of ​​the charging carport and determines whether the smoke concentration data is abnormal. If abnormal, a smoke fire signal is sent to the control mechanism 7. If normal, the information is stored.

[0110] Step 2: The distributed optical fiber sensor 2 acquires the temperature data of each sub-zone and determines whether the temperature data is abnormal. The flame detector acquires the flame signal of each sub-zone and determines whether the flame signal is abnormal. If both the temperature data and the flame signal are abnormal, a temperature fire signal is transmitted to the control mechanism 7. If normal, the information is stored.

[0111] Step 2 also includes: obtaining thermal image data in the charging carport in real time through the infrared thermal imaging camera 8, and transmitting the thermal image data to the control mechanism 7, thereby providing the control mechanism 7 with more information about the temperature distribution in the carport, further improving the accuracy of fire warning, and being able to detect potential high temperature hazards in the early stages of a fire.

[0112] Step 3: When the control mechanism 7 receives the smoke fire signal and / or the temperature fire signal, the control mechanism 7 controls the telescopic mechanism 6 to drive the sprinkler head 5 to the fire occurrence sub-area.

[0113] Furthermore, the control mechanism 7 controls the telescopic mechanism 6 to drive the sprinkler head 5 to the fire occurrence sub-area, including:

[0114] Step 31: The control mechanism 7 controls the driving motor 63 to drive the screw rod 64 to rotate, and the screw rod nut 65 moves relative to the screw rod 64 toward the fire occurrence sub-area.

[0115] Step 32: The screw nut 65 drives the base 66 to slide along the slide rail 62 to drive the nozzle 5 to move. The spring 67 releases its elastic force and then is stretched. When the nozzle 5 moves to the fire sub-area, the control mechanism 7 controls the motor to stop working.

[0116] In this embodiment of the present application, the control mechanism 7 controls the drive motor 63 to rotate the screw 64, causing the screw nut 65 to move relative to the screw 64 toward the fire sub-zone. The screw nut 65 drives the base 66 to slide along the slide rail 62, thereby moving the sprinkler head 5. The spring 67 assists in this movement. Upon reaching the fire sub-zone, the drive motor 63 stops. The screw nut 65 drives the sprinkler head 5, while the spring 67 assists in this movement and acts as a buffer, thereby precisely controlling the sprinkler head 5's movement to the fire sub-zone and ensuring accurate fire extinguishing.

[0117] Step 4: The control mechanism 7 controls the infusion mechanism 3 to deliver the fire extinguishing substance to the sprinkler 5 through the infusion main pipe 4.

[0118] Step 4 specifically includes:

[0119] Step 41: The control mechanism 7 controls the first infusion structure 31 to deliver the first fire extinguishing substance to the multi-way junction 33 through the infusion branch pipe 32, and delivers the first fire extinguishing substance to the nozzle 5 through the infusion main pipe 4 through the multi-way junction 33 for a preset time.

[0120] Step 42: The control mechanism 7 then controls the second infusion structure 31 to deliver the second fire extinguishing substance to the multi-way junction 33 through the infusion branch pipe 32, and delivers the second fire extinguishing substance to the nozzle 5 through the infusion main pipe 4 through the multi-way junction 33 until the fire is extinguished.

[0121] Specifically, the control mechanism 7 controls the second water pump 315 of each infusion structure 31 to deliver the fire extinguishing substance to the multi-way junction 33 via the infusion branch pipe 32. The first liquid level gauge 316 and the second liquid level gauge 317 measure the liquid level in the second liquid tank 314 in real time. When the liquid level falls below the height measured by the first liquid level gauge 316, the control mechanism 7 controls the first water pump 312 of the infusion structure 31 to deliver the fire extinguishing substance to the second liquid tank 314 via the infusion pipe to replenish the fire extinguishing substance in the second liquid tank 314. When the fire extinguishing substance reaches the height measured by the second liquid level gauge 317, the control mechanism 7 controls the second water pump 315 to stop operation.

[0122] In the method of the present embodiment, control mechanism 7 first controls the first infusion mechanism 31 to deliver a first fire extinguishing substance to the sprinkler 5 for a preset time. It then controls the second infusion mechanism 31 to deliver a second fire extinguishing substance to the sprinkler 5 until the fire is extinguished. This allows for the use of different fire extinguishing substances in different stages, depending on the stage and characteristics of the fire, to improve fire extinguishing effectiveness, reduce fire losses, and lower fire extinguishing costs.

[0123] Step 5: The smoke concentration data of each sub-area of ​​the charging carport is obtained through the smoke sensor 1, and it is determined whether the smoke concentration data is normal. If it is normal, a smoke normal signal is sent to the control mechanism 7.

[0124] Step 6: Obtain the temperature data of each sub-zone through the distributed optical fiber sensor 2, and determine whether the temperature data is normal. Obtain the flame signal of each sub-zone through the flame detector, and determine whether the flame signal is normal. If both the temperature data and the flame signal are normal, a normal temperature signal is sent and transmitted to the control mechanism 7.

[0125] Step 7: The control mechanism 7 controls the infusion mechanism 3 to close, and controls the telescopic mechanism 6 to drive the nozzle 5 to reset.

[0126] Furthermore, the control mechanism 7 controls the telescopic mechanism 6 to drive the nozzle 5 to reset, including:

[0127] Step 31 : The control mechanism 7 controls the driving motor 63 to drive the screw rod 64 to rotate, and the screw rod nut 65 moves relative to the screw rod 64 toward the end surface of the slide rail 62 .

[0128] Step 32: The screw nut 65 drives the base 66 to slide along the slide rail 62 to drive the nozzle 5 to move toward the end surface of the slide rail 62. The spring 67 is first pulled back and then compressed. When the nozzle 5 returns to the reset zone, the control mechanism 7 controls the motor to stop working.

[0129] The electric vehicle charging carport fire extinguishing method provided in the embodiment of the present application monitors the smoke concentration, temperature and flame signal of each sub-area in real time through various sensors, and determines whether there is an abnormality. If there is an abnormality, a fire signal is sent to the control mechanism 7. The control mechanism 7 controls the telescopic mechanism 6 and the infusion mechanism 3 to extinguish the fire according to the fire signal. Continuous monitoring is carried out during the fire extinguishing process. When the data is detected to be normal, a normal signal is sent, the control mechanism 7 controls the infusion mechanism 3 to close, and the telescopic mechanism 6 drives the nozzle 5 to reset. The method of the embodiment of the present application adopts closed-loop control, monitors the fire situation in real time, controls the fire extinguishing process according to the monitoring results, and ensures the effectiveness and timeliness of the fire extinguishing. Automatic monitoring, fire extinguishing and resetting of fires can be realized, thereby improving the intelligence and reliability of the fire extinguishing system.

[0130] The electric vehicle charging carport fire extinguishing device and method provided in the embodiment of the present application is more complete, and its core innovations are multi-source heterogeneous sensor data fusion and intelligent fire identification engine, and zone linkage fire extinguishing control based on precise positioning. Deep collaborative application of infrared-video dual camera system, distributed system architecture based on edge computing, self-diagnosis, self-learning and system health management. Through these core innovations, intelligent collaboration is used to solve the key pain points in specific scenarios and achieve the effect of 1+1>2. Therefore, the core competitiveness of the patent of this invention lies in the construction of a closed-loop intelligent fire protection system of "perception-cognition-decision-execution", and deep optimization for electric vehicle fire scenarios: (1) Intelligent perception layer: DTS (spatial temperature + temperature change) + smoke sensing (smoke) + dual camera (flame / smoke vision + thermal imaging) + multi-dimensional, complementary perception. (2) Edge cognition layer: locally deployed multi-source fusion intelligent identification engine + fast and accurate identification of real fire conditions and locations (confidence + coordinates). (3) Accurate decision layer: intelligent fire extinguishing strategy selector based on location and fire conditions + determination of the optimal fire extinguishing method and range. (4) Efficient execution layer: fire extinguishing equipment with partitionable / directional control, local alarm, and precise and rapid fire extinguishing. (5) Reliable support layer: edge computing architecture ensures low latency and high reliability, self-diagnosis and self-learning ensure system health, and continuous optimization of operation. (6) Information aggregation layer: key information is uploaded to the control unit 7 and then transmitted to the fire control room to achieve global monitoring and command.

[0131] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0132] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A fire extinguishing device for an electric vehicle charging shed, characterized in that: It includes smoke sensor, distributed optical fiber sensor, flame detector, infusion mechanism, infusion main pipe, sprinkler head, telescopic mechanism and control mechanism; Divide the charging shed into multiple sub-areas along the length direction and number them; A smoke sensor is installed on the top of each sub-area, and a plurality of smoke sensors are electrically connected to the control mechanism; The distributed optical fiber sensor is arranged above the charging position of the charging shed along the length direction of the charging shed, the distributed optical fiber sensor is electrically connected to the control mechanism, and transmits the length of each sub-area and the corresponding length position information of the distributed optical fiber sensor to the control mechanism; Above the charging position of the charging carport, a flame detector is provided in each sub-area position, and the flame detector is electrically connected to the control mechanism; One end of the infusion main pipe is connected to the infusion mechanism, and the other end is connected to the nozzle; The telescopic mechanism is arranged on the top of the charging carport and is electrically connected to the control mechanism. The nozzle is arranged below the telescopic mechanism, so that the control mechanism controls the telescopic mechanism to extend and retract according to the data transmitted by the smoke sensor, the distributed optical fiber sensor and the flame detector, and drives the nozzle to the fire occurrence sub-area to extinguish the fire and then reset.

2. The electric vehicle charging shed fire extinguishing device according to claim 1, characterized in that: Also included is an infrared thermal imaging camera; The infrared thermal imaging camera is arranged on the top of the charging carport and is electrically connected to the control mechanism. It can obtain thermal image data in the charging carport in real time and transmit the thermal image data to the control mechanism.

3. The electric vehicle charging shed fire extinguishing device according to claim 1, characterized in that: The infusion mechanism includes an infusion structure, an infusion branch pipe, and a multi-way junction; The infusion structure comprises at least two groups, the number of which is consistent with the number of diversion ports of the multi-way junction, and both are electrically connected to the control mechanism; The number of the infusion branches is consistent with the number of the infusion structures, and one end of each infusion branch is connected to an infusion structure, and the other end is connected to a branch port of the multi-way junction; The main port of the multi-way junction is connected to one end of the main infusion pipe; Different types of fire extinguishing substances are placed in at least two groups of infusion structures.

4. The electric vehicle charging shed fire extinguishing device according to claim 3, characterized in that: The liquid infusion structure includes a first liquid tank, a first water pump, a liquid delivery pipe, a second liquid tank, a second water pump, a first liquid level gauge and a second liquid level gauge; The first liquid tank stores fire extinguishing material; The first water pump is disposed in the first liquid tank; One end of the liquid delivery pipe is connected to the first water pump, and the other end extends into the second liquid tank; The second water pump is disposed in the second liquid tank; One end of the infusion branch is connected to the second liquid tank; The first liquid level gauge and the second liquid level gauge are arranged on the side wall of the second liquid tank, and the position of the first liquid level gauge is higher than that of the second liquid level gauge; The first water pump, the second water pump, the first liquid level gauge and the second liquid level gauge are all electrically connected to the control mechanism.

5. The electric vehicle charging shed fire extinguishing device according to claim 3 or 4, characterized in that: The fire extinguishing substance is water or perfluorohexanone.

6. The electric vehicle charging shed fire extinguishing device according to claim 1, characterized in that: The telescopic mechanism includes a bracket, a slide rail, a drive motor, a screw rod, a screw rod nut, a base and a spring; The bracket is arranged along the length direction of the charging carport; The slide rail is arranged along the length direction of the bracket; The base is a block, with a fixing hole running through the length direction on the top and an infusion channel on the bottom, which is slidably arranged on the slide rail; The screw rod is connected to the output shaft of the drive motor; The screw nut is sleeved on the screw and fixed in the fixing hole; The two ends of the spring are respectively fixed to the end surface of the slide rail and the side surface of the base and are in a compressed state; The nozzle is arranged below the base; One end of the main infusion pipe is communicated with the infusion channel.

7. The electric vehicle charging shed fire extinguishing device according to claim 1 or 6, characterized in that: Also included is a snap mechanism; The buckle mechanism includes a driving structure, a rotating shaft and a hook; A mounting groove is provided on the side wall of the slide rail in each sub-area; The driving structure is connected to the rotating shaft; The rotating shaft is rotatably disposed in the mounting slot; One end of the hook is sleeved and fixed on the rotating shaft; A card slot is provided at a position of the telescopic mechanism corresponding to the card hook.

8. A method for extinguishing fire in an electric vehicle charging shed, characterized in that: The electric vehicle charging shed fire extinguishing device according to any one of claims 1 to 7 comprises: The smoke sensor obtains the smoke concentration data of each sub-area of ​​the charging carport, determines whether the smoke concentration data is abnormal, and if abnormal, sends a smoke fire signal to the control mechanism; Obtaining temperature data of each sub-area through a distributed optical fiber sensor, determining whether the temperature data is abnormal, obtaining a flame signal of each sub-area through a flame detector, determining whether the flame signal is abnormal, and if both the temperature data and the flame signal are abnormal, issuing a temperature fire signal and transmitting it to the control mechanism; When the control mechanism receives the smoke fire signal and / or the temperature fire signal, the control mechanism controls the telescopic mechanism to drive the sprinkler head to the fire occurrence sub-area; The control mechanism controls the infusion mechanism to deliver the fire extinguishing substance to the sprinkler head through the infusion main pipe; The smoke sensor obtains the smoke concentration data of each sub-area of ​​the charging carport, determines whether the smoke concentration data is normal, and if normal, transmits a smoke normal signal to the control mechanism; Obtaining temperature data of each sub-area through a distributed optical fiber sensor to determine whether the temperature data is normal; obtaining a flame signal of each sub-area through a flame detector to determine whether the flame signal is normal; and if both the temperature data and the flame signal are normal, issuing a normal temperature signal to transmit to the control mechanism; The control mechanism controls the infusion mechanism to close, and controls the telescopic mechanism to drive the nozzle to reset.

9. The electric vehicle charging shed fire extinguishing method according to claim 8, characterized in that: The control mechanism controls the infusion mechanism to deliver the fire extinguishing substance to the sprinkler head through the infusion main pipe, including: The control mechanism controls the first infusion structure to deliver the first fire extinguishing substance to the multi-way junction through the infusion branch pipe, and delivers the first fire extinguishing substance to the nozzle through the infusion main pipe through the multi-way junction for a preset time; Then the control mechanism controls the second infusion structure to deliver the second fire extinguishing substance to the multi-way junction through the infusion branch pipe, and delivers the second fire extinguishing substance to the nozzle through the infusion main pipe through the multi-way junction until the fire is extinguished.

10. The electric vehicle charging shed fire extinguishing method according to claim 8, characterized in that: The control mechanism controls the telescopic mechanism to drive the sprinkler head to the fire occurrence sub-area, including: The control mechanism controls the driving motor to drive the screw to rotate, and the screw nut moves relative to the screw toward the fire occurrence sub-area; The screw nut drives the base to slide along the slide rail to drive the sprinkler head to move. The spring first releases its elastic force and then is stretched. When the sprinkler head moves to the fire occurrence sub-area, the control mechanism controls the motor to stop working.

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