Photovoltaic prefabricated cabin fire fighting device and control method

Abstract

The invention relates to the technical field of photovoltaic fire fighting, and discloses a photovoltaic prefabricated cabin fire fighting device and a control method.The photovoltaic prefabricated cabin fire fighting device comprises a first equipment cabin, the first equipment cabin comprises an infrared and visible light double-view camera, and the infrared and visible light double-view camera is arranged in the first equipment cabin; the infrared and visible light double-view camera faces a heating source of the first equipment cabin; and the second equipment compartment is isolated from the first equipment compartment through a fireproof material, the second equipment compartment is provided with a video monitoring system, and the infrared and visible light double-view camera is electrically connected with the video monitoring system. By arranging the infrared and visible light double-view camera and the independent equipment cabin structure, temperature distribution and real-time scenes in the equipment cabin are obtained, the infrared camera is directly aligned with a heating source, the local overheating phenomenon caused by electrical faults can be recognized in the early stage, the visible light camera can capture visual features of open fire or smoke, and the misjudgment probability is reduced.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic fire protection technology, specifically to a fire protection device and control method for photovoltaic prefabricated cabins. Background Technology

[0002] Prefabricated photovoltaic (PV) modules have been widely used in PV power plant construction due to their modular design, factory production, rapid installation, and intelligent management. Their standardized structure not only shortens the construction cycle but also reduces the complexity of on-site installation. However, current fire protection systems for PV modules mainly rely on traditional configurations, such as fire alarm control panels, smoke detectors, and fire extinguishers. Fire detection is primarily based on the dense smoke produced after a fire has started. Passive monitoring has a significant lag; by the time smoke triggers the alarm, the fire has often already progressed, potentially causing severe damage to electrical equipment inside the module or even triggering a large-scale power outage in the PV power plant, resulting in significant economic losses.

[0003] In related technologies, a significant contributing factor to fires in prefabricated photovoltaic (PV) cabins lies in the heat accumulation effect during the operation of primary equipment within the cabin. The large current flowing through conductive components such as busbars and circuit breakers generates Joule heat, and the enclosed structure of the prefabricated cabin hinders heat dissipation, leading to a continuous rise in localized temperatures. When the accumulated heat exceeds the ignition point of the equipment's insulation materials or the ignition point of adjacent combustibles, a fire breaks out. Existing fire suppression systems only monitor smoke and cannot detect early temperature rise changes in real time, missing crucial opportunities for early warning and intervention during the overheating phase. Summary of the Invention

[0004] In view of this, the present invention provides a fire-fighting device and control method for photovoltaic prefabricated cabins to solve the problem that the risks of photovoltaic prefabricated cabins cannot be predicted in advance in the prior art.

[0005] In a first aspect, the present invention provides a fire-fighting device for photovoltaic prefabricated cabins, comprising: The first equipment compartment includes an infrared and visible light dual-view camera, which is installed inside the first equipment compartment and faces the heat source of the first equipment compartment. The second equipment compartment is isolated from the first equipment compartment by fireproof materials. The second equipment compartment is equipped with a video monitoring system, and infrared and visible light dual-view cameras are electrically connected to the video monitoring system.

[0006] Beneficial Effects: By installing dual infrared and visible light cameras and an independent equipment compartment structure, the accuracy and reliability of fire monitoring in photovoltaic prefabricated compartments are significantly improved. The system acquires temperature distribution and real-time scene data within the equipment compartment, forming a dual verification mechanism. The infrared camera, directly aimed at the heat source, can identify early signs of localized overheating caused by electrical faults, while the visible light camera captures the visual characteristics of open flames or smoke. The data from both systems is integrated and analyzed through a video monitoring system, significantly reducing the probability of false alarms. Furthermore, the first and second equipment compartments are physically isolated using fire-resistant materials, ensuring that critical monitoring equipment is not directly affected by heat radiation or flames during a fire, guaranteeing continuous system operation. Even if the first equipment compartment catches fire, the second equipment compartment can still remotely transmit data, buying time for personnel evacuation and firefighting decisions.

[0007] In one alternative implementation, the first equipment compartment further includes: A smoke sensor is located at the top of the first equipment compartment and is adapted to detect smoke and generate a signal. A gaseous fire suppression system is installed inside the first equipment compartment and is suitable for extinguishing fires using gas. The fire control panel is electrically connected to the smoke sensor and the gas extinguishing system. The fire control panel is adapted to receive the output signal of the smoke sensor and control the gas extinguishing system to start extinguishing the fire based on the output signal of the smoke sensor.

[0008] Beneficial Effects: A multi-level fire response system is constructed through the coordinated control of smoke sensors and a gas extinguishing system. The smoke sensors, installed on the top of the cabin, quickly detect particulate matter generated by smoldering. Their signals trigger the fire control panel to activate the gas extinguishing system, suitable for extinguishing electrical fires. Compared to traditional sprinkler systems, gas extinguishing does not cause secondary damage due to short circuits, and the extinguishing agent diffuses evenly, effectively covering the enclosed cabin space. The fire control panel, as the core controller, integrates temperature data, preventing malfunctions from a single sensor. Furthermore, the residue-free nature of the gas extinguishing system is particularly suitable for protecting the precision electronic equipment inside the photovoltaic prefabricated cabin, allowing for restoration of operation without cumbersome cleaning after fire suppression.

[0009] In one optional implementation, the video surveillance system is equipped with a display screen suitable for displaying the monitoring images from both infrared and visible light dual-view cameras in real time. The video surveillance system identifies abnormal temperature points in the infrared image using image algorithms and issues alarm signals. The alarm signals are suitable for accessing the fire alarm control panel or being uploaded to the dispatch station via wireless signals.

[0010] Beneficial effects: Through intelligent image processing technology, fire monitoring is upgraded from passive response to proactive prevention. Its display screen shows dual-light images in a split-screen format, allowing maintenance personnel to intuitively compare temperature distribution in the same area with the real-world scene. The system's built-in image algorithm automatically marks temperature anomalies and notifies the remote dispatch station via audible and visual alarms or wireless transmission, enabling real-time monitoring in unattended scenarios. The dispatch center can simultaneously monitor the status of multiple prefabricated modules, significantly reducing maintenance costs.

[0011] In one alternative implementation, a fire door is provided between the first equipment compartment and the second equipment compartment.

[0012] Beneficial effects: In addition to physical isolation, it adds emergency exit control functionality. Fire doors remain closed under normal conditions, ensuring the integrity of the fire compartment between the two sections and preventing the spread of fire from the first equipment compartment to the second compartment via cable holes or other means. The fire doors can be manually opened to create passageways, facilitating operation and maintenance. The fire doors solve the problem of spatial accessibility during equipment maintenance while ensuring fire resistance.

[0013] In one alternative embodiment, the first equipment compartment also includes a fire extinguisher, which is located inside the first equipment compartment and is suitable for manual fire extinguishing in the early stages of an accident.

[0014] Beneficial effects: By deploying portable fire extinguishers, a means of manual intervention is provided for the initial response to fires. The fire extinguishers are placed in easily accessible locations within the equipment compartment, allowing on-site personnel to quickly extinguish small fires before the gas extinguishing system is triggered, even when early fires are detected by dual-view cameras.

[0015] Secondly, the present invention also provides a control method for a photovoltaic prefabricated cabin fire-fighting device, applied to the aforementioned photovoltaic prefabricated cabin fire-fighting device, comprising: Real-time images of the equipment's operating status are acquired using dual infrared and visible light cameras, including both infrared and visible light images. Simultaneously, infrared and visible light images are analyzed to determine if any abnormalities exist; If any abnormality is found, the location of the heating point and whether the temperature exceeds the limit will be determined based on the analysis results of infrared and visible light images. When the temperature exceeds the over-temperature threshold but does not exceed the open flame threshold, an alarm signal is issued and uploaded to the dispatch station to remind manual confirmation; when the temperature exceeds the open flame threshold, it is determined whether a fire has occurred and a signal is sent to the fire control panel for fire suppression.

[0016] Beneficial effects: Through a multi-threshold hierarchical response mechanism, precise and intelligent fire response is achieved. Temperature anomalies are categorized into different stages and matched with different response strategies: triggering an alarm only and uploading data for manual review avoids overreaction; the latter automatically initiates the fire extinguishing procedure, suitable for unattended scenarios. This method significantly improves fire identification accuracy through dual-spectral image fusion analysis.

[0017] In one optional implementation, the infrared light image and the visible light image are analyzed simultaneously to determine whether there is an anomaly, including: analyzing the infrared light image through the infrared light analysis module, analyzing the temperature distribution of the current infrared light image according to the principle of infrared thermal imaging, and determining whether the temperature exceeds the set value.

[0018] Beneficial effects: The proprietary infrared analysis module uses temperature field modeling technology to analyze infrared image pixels and convert them into temperature values. The system compares the current temperature with preset thresholds in real time, allowing maintenance personnel to intuitively identify the location of the highest temperature point and the trend of heat diffusion. The temperature threshold can also be adaptively adjusted according to the environment. For example, when the base temperature inside the cabin is high in summer, the alarm threshold is automatically increased to reduce false alarms caused by seasonal factors.

[0019] In one alternative implementation, after simultaneously analyzing visible light and infrared light images, the two video images are displayed on a monitor in separate screens and channels, and then uploaded to the dispatch station via wireless communication.

[0020] Beneficial effects: The dual-light split-screen display and wireless transmission function construct a three-dimensional monitoring network. Infrared and visible light images are presented on the monitoring terminal in a split-screen format, allowing maintenance personnel to simultaneously observe temperature anomalies and appearance changes of the same equipment. The wireless transmission module ensures real-time data upload to the dispatch station cloud platform, improving the operation and maintenance efficiency of distributed photovoltaic power stations and meeting the technical requirements of smart grids for remote equipment status sensing.

[0021] In one optional implementation, when the temperature exceeds the open flame threshold, determining whether a fire has occurred includes: combining visible light and infrared light images to perform dual-light image fusion analysis; if both images indicate a fire, then a fire is determined to have occurred.

[0022] Beneficial effects: Dual-light image fusion analysis reduces the false alarm rate of fires. It analyzes infrared and visible light images separately, and only when both types of images meet the fire model is it finally determined to be a fire, effectively avoiding the limitations of a single sensor. In one optional implementation, sending a signal to the fire control panel for fire suppression includes: Activate the gas fire suppression system to extinguish the fire; Alternatively, the method may also include: acquiring the detection signal from the smoke sensor, determining whether a fire has occurred based on the detection signal from the smoke sensor, and if so, activating the gas extinguishing system to extinguish the fire.

[0023] Beneficial effects: When a fire is confirmed, the gas extinguishing system is activated immediately. If only the smoke sensor alarms, the camera footage needs to be reviewed for secondary confirmation. This ensures a rapid response in emergencies while avoiding false alarms caused by smoke, and also alerts personnel inside the cabin with audible and visual alarms. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the fire-fighting device for photovoltaic prefabricated cabins according to the present invention; Figure 2 This is a schematic diagram of the verification process for the control method of the fire-fighting device for photovoltaic prefabricated cabins according to the present invention.

[0026] Explanation of reference numerals in the attached figures: 11. First equipment compartment; 12. Second equipment compartment; 101. Power distribution equipment; 102. Infrared and visible light dual-view camera; 103. Smoke sensor; 104. Gas extinguishing system; 105. Fire control panel; 106. Video surveillance system; 107. Fire door; 108. Fire extinguisher. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] During long-term operation, the equipment in prefabricated photovoltaic cabins generates heat due to increased contact resistance or overload. Although the sealed cabin is equipped with forced ventilation, the heat dissipation efficiency is affected by the ambient temperature. Once heat accumulates and the local temperature rise exceeds the critical value, it may trigger a chain reaction. However, there are no active monitoring methods for this in related technologies, resulting in an inherent deficiency in fire prevention.

[0032] The following is combined Figures 1 to 2 The following describes embodiments of the present invention.

[0033] According to an embodiment of the present invention, in one aspect, a fire-fighting device for photovoltaic prefabricated cabins is provided, comprising: a first equipment cabin 11, the first equipment cabin 11 including an infrared and visible light dual-view camera 102, the infrared and visible light dual-view camera 102 being disposed inside the first equipment cabin 11 and facing the heat source of the first equipment cabin 11; a second equipment cabin 12, the second equipment cabin being isolated from the first equipment cabin by fireproof material, the second equipment cabin 12 being provided with a video monitoring system 106, and the infrared and visible light dual-view camera 102 being electrically connected to the video monitoring system 106.

[0034] By installing dual infrared and visible light cameras 102 and an independent equipment compartment structure, the accuracy and reliability of fire monitoring in photovoltaic prefabricated modules are significantly improved. The system acquires temperature distribution and real-time scene data within the equipment compartment, forming a dual verification mechanism. The infrared camera is directly aimed at the heat source, enabling early identification of localized overheating caused by electrical faults, while the visible light camera captures the visual characteristics of open flames or smoke. The data from both is integrated and analyzed by the video monitoring system 106, greatly reducing the probability of false alarms. Furthermore, the first equipment compartment 11 and the second equipment compartment 12 are physically isolated using fire-resistant materials, ensuring that critical monitoring equipment is not directly affected by heat radiation or flames during a fire, guaranteeing continuous system operation. Even if the first equipment compartment 11 catches fire, the second equipment compartment 12 can still remotely transmit data, buying time for personnel evacuation and firefighting decisions.

[0035] Furthermore, a fire door 107 is installed between the first equipment compartment 11 and the second equipment compartment 12. This adds an emergency passage control function to the physical isolation. The fire door 107 is normally kept closed to ensure the integrity of the fire compartment between the two compartments and prevent a fire in the first equipment compartment 11 from spreading to the second compartment through cable holes or other means. The fire door 107 can be manually opened to create a passage, facilitating operation and maintenance. The fire door 107 solves the problem of spatial accessibility during equipment maintenance while ensuring fire resistance.

[0036] Specifically, the isolation structure between the first equipment compartment 11 and the second equipment compartment 12 can be made of fire-resistant materials such as fire-resistant rock wool board, fire-resistant calcium silicate board, or fire-resistant ceramic fiber board to ensure the effectiveness of the fire compartment between the two compartments in the event of a fire. In addition, a fire door 107 is installed between the two compartments. This fire door 107 remains closed under normal conditions to block the spread of fire, but can be manually opened during equipment maintenance to facilitate access for maintenance personnel. The fire door 107 can be made of steel fire door or composite fire door and is equipped with an automatic door closer.

[0037] Optionally, the first equipment compartment 11 is also equipped with dry powder fire extinguishers or carbon dioxide fire extinguishers, which are placed near the compartment door or main equipment area for easy and quick access. The fire extinguisher 108 can be selected in 4kg or 8kg capacity depending on the compartment volume to cover the needs of initial fire suppression.

[0038] It is worth noting that the first equipment compartment 11 also includes a fire extinguisher 108, which is located inside the first equipment compartment 11 and is suitable for manual fire extinguishing in the early stages of an accident. The provision of portable fire extinguishers provides a means of manual intervention in the initial response to a fire. The fire extinguisher 108 is placed in an easily accessible location within the equipment compartment, allowing on-site personnel to quickly extinguish small fires when the dual-view camera detects an early fire but the gas extinguishing system 104 has not yet been triggered.

[0039] In some embodiments, combined with Figure 1 As shown, the first equipment compartment 11 also includes: a smoke sensor 103, which is disposed at the top of the first equipment compartment 11 and is adapted to detect smoke and generate a signal; a gas extinguishing system 104, which is disposed inside the first equipment compartment 11 and is adapted to extinguish fires using gas; and a fire control panel 105, which is electrically connected to the smoke sensor 103 and the gas extinguishing system 104 and is adapted to receive the output signal of the smoke sensor 103 and control the gas extinguishing system 104 to start extinguishing fires based on the output signal of the smoke sensor 103.

[0040] A multi-level fire response system is constructed through the coordinated control of smoke sensor 103 and gas extinguishing system 104. Smoke sensor 103, installed on the top of the cabin, can quickly detect particulate matter generated by smoldering. Its signal triggers fire control panel 105 to activate gas extinguishing system 104, suitable for extinguishing electrical fires. Compared to traditional sprinkler systems, gas extinguishing does not cause secondary damage due to short circuits in equipment, and the extinguishing agent diffuses evenly, effectively covering the enclosed cabin space. Fire control panel 105, as the core controller, integrates temperature data to avoid malfunctions of a single sensor. Furthermore, the residue-free nature of gas extinguishing system 104 is particularly suitable for protecting precision electronic equipment inside photovoltaic prefabricated cabins, and it can be restored to operation without cumbersome cleaning after fire suppression.

[0041] The extinguishing agent for the gaseous fire suppression system 104 can be selected from heptafluoropropane, perfluorohexanone, or inert gas. The nozzles of the gaseous fire suppression system 104 can be arranged in a total flooding or localized application manner. The number and location of the nozzles are determined based on the cabin volume and equipment layout to ensure that the extinguishing agent covers all fire-risk areas. After receiving the alarm signal from the smoke sensor 103, the fire control panel 105 can analyze the data in conjunction with the temperature data from the infrared camera. If a fire is confirmed, it immediately triggers the gaseous fire suppression system 104 to start, while simultaneously shutting down the cabin ventilation equipment to enhance the fire suppression effect.

[0042] In some embodiments, combined with Figure 1 As shown, the video surveillance system 106 is equipped with a display screen, which is suitable for displaying the monitoring images of the infrared and visible light dual-view cameras 102 in real time. The video surveillance system 106 identifies abnormal temperature points in the infrared image through image algorithms and issues alarm signals. The alarm signals are suitable for accessing the fire alarm control panel 105 or for uploading to the dispatch station via wireless signals.

[0043] By leveraging intelligent image processing technology, fire monitoring is upgraded from passive response to proactive prevention. Its display screen shows dual-light images in a split-screen format, allowing maintenance personnel to intuitively compare temperature distribution in the same area with the real-world scene. The system's built-in image algorithm automatically marks temperature anomalies and notifies remote dispatch stations via audible and visual alarms or wireless transmission, enabling real-time monitoring in unattended scenarios. The dispatch center can simultaneously monitor the status of multiple prefabricated modules, significantly reducing maintenance costs.

[0044] According to an embodiment of the present invention, another aspect provides a control method for a fire-fighting device for a photovoltaic prefabricated cabin, comprising: acquiring real-time images of the equipment's operating status using a dual-view camera with both infrared and visible light, the images including infrared and visible light images; simultaneously analyzing the infrared and visible light images to determine if any abnormalities exist; if any abnormalities are found, determining the location of the heat source and determining whether the temperature exceeds the limit based on the analysis results of the infrared and visible light images; when the temperature exceeds the over-temperature threshold but does not exceed the open flame threshold, issuing an alarm signal and uploading it to the dispatch station to remind manual confirmation; when the temperature exceeds the open flame threshold, determining whether a fire has occurred and sending a signal to the fire control panel 105 for fire extinguishing.

[0045] By employing a multi-threshold hierarchical response mechanism, precise and intelligent fire response is achieved. Temperature anomalies are categorized into different stages and matched with different response strategies: when an alarm is triggered, only the data is uploaded for manual review to avoid overreaction; in the latter case, the fire extinguishing procedure is automatically initiated, suitable for unattended scenarios. This method significantly improves the accuracy of fire identification through dual-spectral image fusion analysis.

[0046] Furthermore, both infrared and visible light images are analyzed simultaneously to determine anomalies. This includes analyzing the infrared image using an infrared analysis module, analyzing the temperature distribution of the current infrared image based on infrared thermal imaging principles, and determining whether the temperature exceeds a set value. A dedicated infrared analysis module uses temperature field modeling technology to convert infrared image pixels into temperature values. The system compares the current temperature with preset thresholds in real time, allowing maintenance personnel to intuitively identify the location of the highest temperature point and the trend of heat diffusion. The temperature threshold can also be adaptively adjusted according to the environment; for example, it automatically increases the alarm threshold when the base temperature inside the cabin is high in summer, reducing false alarms caused by seasonal factors.

[0047] Specifically, after simultaneously analyzing visible light and infrared images, the two types of video images are displayed on a separate screen and channel on the monitor, and uploaded to the dispatch station via wireless communication. This dual-light split-screen display and wireless transmission function constructs a three-dimensional monitoring network. By presenting infrared and visible light images in a split-screen format on the monitoring terminal, maintenance personnel can simultaneously observe temperature anomalies and appearance changes of the same equipment. The wireless transmission module ensures that data is uploaded to the dispatch station's cloud platform in real time, improving the operation and maintenance efficiency of distributed photovoltaic power stations and meeting the technical requirements of smart grids for remote sensing of equipment status.

[0048] In some embodiments, combined with Figure 2 As shown, when the temperature exceeds the open flame threshold, the determination of whether a fire has occurred includes: combining visible light and infrared light images for dual-light image fusion analysis. If both images indicate a fire, then a fire is determined to have occurred. Dual-light image fusion analysis reduces the false alarm rate of fires. It analyzes infrared and visible light images separately, and only when both types of images simultaneously match the fire model is a fire finally determined, effectively avoiding the limitations of a single sensor. It is worth noting that sending a signal to the fire control panel 105 for fire suppression includes: activating the gas extinguishing system 104; or, the method further includes: acquiring the detection signal from the smoke sensor 103, determining whether a fire has occurred based on the detection signal from the smoke sensor 103, and if so, activating the gas extinguishing system 104 to extinguish the fire. When a fire is confirmed, the gas extinguishing system is activated immediately. If only the smoke sensor 103 alarms, the camera footage needs to be reviewed for secondary confirmation. This ensures rapid response in emergencies while avoiding false alarms caused by smoke, and simultaneously alerts personnel inside the cabin through audible and visual alarms.

[0049] The working process of the fire-fighting device for photovoltaic prefabricated cabins is as follows: The visible light dual-view camera continuously collects the temperature distribution and real-time images inside the equipment compartment, the infrared camera detects the temperature of the heat source, and the visible light camera captures the characteristics of smoke or open flame. The data is synchronously transmitted to the video monitoring system 106. The video surveillance system 106 performs fusion analysis on dual-spectrum images, with the infrared module identifying abnormal temperature points and the visible light module detecting flames or smoke, and makes a preliminary judgment based on preset thresholds. If the temperature exceeds the overheat threshold but does not reach the open flame threshold, the system triggers a primary alarm, uploads data to the dispatch station, and reminds manual verification; if the temperature exceeds the open flame threshold and the visible light image confirms the fire characteristics, it is determined to be a fire, and a fire extinguishing command is sent to the fire control panel 105. The fire control panel 105 activates the gas extinguishing system 104 to release the extinguishing agent, while simultaneously shutting down the cabin ventilation equipment to enhance the extinguishing effect, and sends a fire confirmation signal to the dispatch station via wireless communication. If the smoke sensor 103 detects smoke independently but the camera does not trigger an alarm, the system will retrieve real-time footage for secondary confirmation to avoid false alarms. After the fire is extinguished, the system will continue to monitor environmental parameters to ensure there is no risk of reignition.

[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A photovoltaic prefabricated cabin fire extinguishing device, characterized by, The application relates to a fire-fighting device for a first equipment cabin (11) of a power supply device, comprising: a first equipment cabin (11) comprising an infrared and visible dual-vision camera (102) arranged inside the first equipment cabin (11) and facing a heat source of the first equipment cabin (11); a second equipment cabin (12) separated from the first equipment cabin (11) by a fireproof material, wherein the second equipment cabin (12) is provided with a video monitoring system (106), and the infrared and visible dual-vision camera (102) is electrically connected with the video monitoring system (106).

2. The photovoltaic prefabricated cabin fire extinguishing apparatus according to claim 1, characterized in that, The first equipment cabin (11) further comprises: a smoke sensor (103) arranged at a top portion of the first equipment cabin (11), wherein the smoke sensor (103) is adapted to detect smoke and generate a signal; a gas fire extinguishing system (104) arranged inside the first equipment cabin (11) and adapted to extinguish fire by gas; a fire-fighting host (105) electrically connected with the smoke sensor (103) and the gas fire extinguishing system (104), wherein the fire-fighting host (105) is adapted to receive an output signal of the smoke sensor (103) and control the gas fire extinguishing system (104) to start fire extinguishing based on the output signal of the smoke sensor (103).

3. The photovoltaic prefabricated cabin fire extinguishing apparatus according to claim 2, characterized in that, The video monitoring system (106) is provided with a display screen and is adapted to display a monitoring image of the infrared and visible dual-vision camera (102) in real time, wherein the video monitoring system (106) is adapted to identify an abnormal temperature point in an infrared image by an image algorithm and send an alarm signal, and the alarm signal is adapted to be connected to the fire-fighting host (105) or uploaded to a dispatch station through a wireless signal.

4. The photovoltaic prefabricated cabin fire extinguishing apparatus according to claim 1, characterized in that, A fireproof door (107) is arranged between the first equipment cabin (11) and the second equipment cabin (12).

5. The photovoltaic prefabricated cabin fire extinguishing apparatus according to claim 4, characterized in that, The first equipment cabin (11) further comprises a fire extinguisher (108) arranged inside the first equipment cabin (11) and adapted to manually extinguish fire in an early stage of an accident.

6. A control method of a photovoltaic prefabricated cabin fire extinguishing device, applied to the photovoltaic prefabricated cabin fire extinguishing device of any one of claims 1-5, characterized in that, The method comprises: acquiring an equipment operation condition image in real time by an infrared and visible dual-vision camera, wherein the equipment operation condition image comprises an infrared light image and a visible light image; simultaneously analyzing the infrared light image and the visible light image to determine whether an abnormality exists; if an abnormality exists, determining a heat point position and judging whether a temperature exceeds a limit based on analysis results of the infrared light image and the visible light image; when the temperature exceeds an over-temperature threshold value but does not exceed a visible fire threshold value, sending an alarm signal and uploading the alarm signal to a dispatch station to remind manual confirmation; when the temperature exceeds the visible fire threshold value, judging whether a fire occurs and sending a signal to a fire-fighting host (105) to extinguish the fire.

7. The method of claim 6, wherein the method further comprises: The step of simultaneously analyzing the infrared light image and the visible light image to determine whether an abnormality exists comprises: analyzing the infrared light image by an infrared light analysis module, analyzing a current temperature distribution of the infrared light image according to an infrared thermal imaging principle, and judging whether the temperature exceeds a set value.

8. The control method of the photovoltaic prefabricated cabin fire extinguishing apparatus according to claim 7, characterized in that, After analyzing the visible light and infrared light images simultaneously, the two video images are displayed on the display in split screen and split channel, and are uploaded to the dispatching station through wireless communication.

9. The method of claim 6, wherein the method further comprises: When the temperature exceeds the open flame threshold, the method further comprises: In combination with the visible light and infrared light images, dual light image fusion analysis is performed, and if both the dual light images determine that a fire occurs, it is determined that a fire occurs.

10. The method of claim 9, wherein the method further comprises: The method further comprises sending a signal to a fire host (105) to extinguish the fire, which comprises: Starting a gas fire extinguishing system (104) to extinguish the fire. Alternatively, the method further comprises: acquiring a detection signal of a smoke sensor (103), determining whether a fire occurs based on the detection signal of the smoke sensor (103), and if so, starting a gas fire extinguishing system (104) to extinguish the fire.

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