Heptafluoropropane mistaken spraying prevention system for power distribution room

Abstract

The invention provides a heptafluoropropane false spraying prevention system for a power distribution room. The heptafluoropropane false spraying prevention system for the distribution room comprises an image acquisition device, a metal induction box, a power supply device and a central control device. The image acquisition device and the metal induction box are arranged in the power distribution room, and the image acquisition device has an acquisition mode for acquiring images in the power distribution room; the metal induction box has a working state of sending an enable signal when detecting that a target object enters; the power supply device is electrically connected with the gas release device, the power supply device has an energy supply state for supplying electric energy to the gas release device, and the power supply device has a closed state for stopping supplying power to the gas release device; and the central control device is used for controlling the power supply device to be in an energy supply state and a closed state according to at least one of an image acquired by the image acquisition device and an enable signal sent by the metal induction box. The heptafluoropropane fire extinguishing device solves the problem of casualties caused by mistaken spraying of the heptafluoropropane fire extinguishing device in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of gas fire extinguishing, and in particular to a system for preventing heptafluoropropane from being accidentally sprayed in a power distribution room. Background Art

[0002] Heptafluoropropane (HFC-227ea) is a clean gas fire extinguishing agent developed by Great Lakes Corporation of the United States. It belongs to halogenated hydrocarbons. It is colorless, odorless, low-toxic, non-conductive, and does not pollute the protected object. In particular, it has no destructive effect on the atmospheric ozone layer and meets environmental protection requirements. The heptafluoropropane fire extinguishing system is one of the more reliable and efficient gas fire extinguishing systems at present, with the characteristics of fast fire extinguishing speed, environmental friendliness, and no secondary pollution. However, due to the characteristics of low-temperature liquefaction and high-temperature gasification of heptafluoropropane fire extinguishing agent, it is stored in liquid form at room temperature below 25°C and in gaseous form at room temperature above 25°C. When the ambient temperature exceeds 8°C, the leakage of heptafluoropropane gas will increase rapidly, causing the spray window to open automatically and release gas.

[0003] In the prior art, the current control method of the HFC-227ea fire extinguishing device is that the release solenoid valve of the HFC-227ea tank is closed during the normal operation of the distribution room. Only when a fire occurs and smoke is emitted can the HFC-227ea release solenoid valve be opened to spray out the HFC-227ea fire extinguishing agent for fire extinguishing through the linkage of the fire control host. When the temperature inside the distribution room is lower than 8°C and there are people present, it is easy for HFC-227ea to be sprayed by mistake, which will cause suffocation or poisoning of the staff; if the mistaken spraying is not discovered in time, the staff will be in the mistakenly sprayed gas for a long time, which will cause serious harm to their health. The current method to prevent mistaken spraying is to install a pin above the solenoid valve to prevent the gas from being sprayed out by mistake. If a person installs a pin on the HFC-227ea spray valve, the control system will be out of control, and the fire extinguishing agent cannot be sprayed out in case of fire; if a person enters the distribution room and manually pulls the pin after a fire occurs, it is still easy to cause insufficient oxygen and cause suffocation of the personnel.

[0004] To address the above problems, no effective solution has been proposed yet. Summary of the invention

[0005] The main purpose of the present invention is to provide a system for preventing accidental spraying of heptafluoropropane in a power distribution room, so as to solve the problem of casualties caused by accidental spraying of heptafluoropropane fire extinguishing devices in the prior art.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a system for preventing accidental spraying of HFC-227ea in a power distribution room is provided, comprising: an image acquisition device, the image acquisition device is arranged in the power distribution room, and the image acquisition device has an acquisition mode for acquiring images in the power distribution room; a metal induction box, the metal induction box is arranged in the power distribution room, and the metal induction box has a working state of sending out an enable signal when detecting that a target object enters; a power supply device, the power supply device is electrically connected to the gas release device, the power supply device has a power supply state of providing electric energy to the gas release device, and the power supply device has a shutdown state of stopping supplying power to the gas release device; a central control device, the central control device is electrically connected to the image acquisition device, the metal induction box and the gas release device, and the central control device is used to control the power supply device to be in a power supply state and a shutdown state according to at least one of the image acquired by the image acquisition device and the enable signal sent by the metal induction box.

[0007] Furthermore, the central control device is used to perform living body detection based on images, and the central control device is used to control the power supply device to be in an off state when the presence of a living body is detected in the power distribution room.

[0008] Furthermore, the central control device is used to control the power supply device to be in a closed state when receiving an enable signal.

[0009] Furthermore, the system for preventing accidental injection of HFC-227ea in the distribution room also includes: a temperature correction device, which is arranged in the distribution room, and is used to detect the temperature value of the temperature-sensitive area in the distribution room. The central control device is electrically connected to the temperature correction device, and the central control device is used to control the power supply device to be in an off state when no living body is detected in the distribution room and the temperature value is less than a preset temperature value.

[0010] Furthermore, the system for preventing accidental injection of HFC-227ea in the distribution room also includes: a temperature correction device, which is arranged in the distribution room, and is used to detect the temperature value of the temperature sensitive area in the distribution room. The central control device is electrically connected to the temperature correction device, and the central control device is used to control the power supply device to be in an off state when the enable signal is not received and the temperature value is less than a preset temperature value.

[0011] Furthermore, the temperature sensitive area includes at least one of a battery room, a relay, a distribution cabinet, and a transformer.

[0012] Furthermore, the system for preventing accidental spraying of heptafluoropropane in the distribution room also includes: a release warning device, which is electrically connected to the central control device, and is used to work when receiving a control instruction from the central control device, so that the release warning device can warn personnel before the gas release device starts to release heptafluoropropane.

[0013] Furthermore, the system for preventing accidental spraying of HFC-227ea in the power distribution room also includes: an emergency ventilation device, which is electrically connected to the release warning device, and is used to control the ventilation duct to be connected to the external atmosphere when the release warning device is working.

[0014] Furthermore, the central control device is a PLC controller.

[0015] Furthermore, the target object is at least one of a key and an identity plate.

[0016] By applying the technical solution of the present invention, through the dual detection mechanism of the image acquisition device and the metal induction box, it is possible to effectively detect whether there are people or living things in the power distribution room. According to the detection situation, the central control device can control the power supply device to switch between the power supply state and the shutdown state, thereby ensuring that heptafluoropropane is released only when no one is around, avoiding the risk of suffocation of people. At the same time, the central control device can achieve remote monitoring, avoiding manual intervention, and further improving the safety and reliability of the system. This solution solves the problem of casualties caused by accidental spraying of heptafluoropropane fire extinguishing devices in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A structural schematic diagram of an embodiment of a system for preventing accidental injection of heptafluoropropane in a power distribution room according to the present invention is shown.

[0019] The above drawings include the following reference numerals:

[0020] 1. Image acquisition device;

[0021] 2. Metal induction box;

[0022] 3. Power supply device;

[0023] 4. Central control device;

[0024] 5. Temperature correction device;

[0025] 6. Gas release device. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0030] Combination Figure 1 As shown, according to a specific embodiment of the present application, a system for preventing accidental injection of heptafluoropropane in a distribution room is provided.

[0031] Specifically, the mis-spraying system includes: an image acquisition device 1, a metal induction box 2, a power supply device 3 and a central control device 4. The image acquisition device 1 is arranged in the power distribution room, and the image acquisition device 1 has an acquisition mode for acquiring images in the power distribution room; the metal induction box 2 is arranged in the power distribution room, and the metal induction box 2 has a working state of sending an enable signal when detecting the entry of a target object; the power supply device 3 is electrically connected to the gas release device 6, and the power supply device 3 has an energy supply state for providing electric energy to the gas release device 6, and the power supply device 3 has an off state for stopping supplying power to the gas release device 6; the central control device 4 is electrically connected to the image acquisition device 1, the metal induction box 2 and the gas release device 6, and the central control device 4 is used to control the power supply device 3 to be in an energy supply state and an off state according to at least one of the image acquired by the image acquisition device 1 and the enable signal sent by the metal induction box 2.

[0032] By applying the technical solution of the present invention, through the dual detection mechanism of the image acquisition device 1 and the metal induction box 2, it is possible to effectively detect whether there are people or living things in the power distribution room. According to the detection situation, the central control device 4 can control the power supply device 3 to switch between the power supply state and the shutdown state, thereby ensuring that heptafluoropropane is released only when no one is around to avoid the risk of suffocation of people. At the same time, the central control device can achieve remote monitoring, avoiding manual intervention, and further improving the safety and reliability of the system. This solution solves the problem of casualties caused by accidental spraying of heptafluoropropane fire extinguishing devices in the prior art.

[0033] Specifically, the central control device 4 is used to perform liveness detection based on images. When the central control device 4 detects the presence of a live body in the power distribution room, the power supply device 3 is controlled to be in a closed state. When the central control device 4 detects the presence of a live body in the power distribution room, the power supply device 3 is controlled to be in a closed state, and the power supply device 3 stops supplying power to the gas release device 6. The gas release device 6 cannot release heptafluoropropane gas, thereby ensuring that no accidental spraying occurs, and protecting the personal safety of personnel in the power distribution room.

[0034] The central control device 4 is used for liveness detection based on images. This liveness detection technology can accurately identify people or animals in the distribution room and can work effectively even in low-light or complex environments, greatly improving the safety and reliability of the system. It is particularly suitable for the safety protection of distribution rooms at night or in low-light environments.

[0035] Specifically, the central control device 4 is used to control the power supply device 3 to be in a closed state when receiving an enable signal. The metal induction box 2 will send an enable signal when detecting the entry of a target object. The central control device 4 receiving the enable signal means that someone has entered the power distribution room. At this time, the power supply device 3 is controlled to be in a closed state to prevent gas release, ensuring the safety of the staff when entering the power distribution room for maintenance or inspection.

[0036] Furthermore, the system for preventing accidental spraying of HFC-227ea in the power distribution room also includes: a temperature correction device 5, which is arranged in the power distribution room, and is used to detect the temperature value of the temperature-sensitive area in the power distribution room, and the central control device 4 is electrically connected to the temperature correction device 5, and the central control device 4 is used to control the power supply device 3 to be in a closed state when no living body is detected in the power distribution room and the temperature value is less than a preset temperature value. This design enables the system to be intelligently adjusted according to the temperature changes in the key areas of the power distribution room, avoiding unnecessary gas release, saving resources, and reducing maintenance costs.

[0037] The addition of the temperature correction device 5 further improves the intelligence and safety of the system for preventing the accidental spraying of heptafluoropropane in the power distribution room. The specific function of the temperature correction device 5 is to monitor the temperature changes in the temperature-sensitive area in the power distribution room as an additional judgment condition for whether to cut off the power supply of the heptafluoropropane gas release device. The purpose of this is to avoid the system from misjudging a fire and starting gas release in non-fire situations, causing unnecessary waste of resources or system misoperation.

[0038] The central control device 4 is connected to the temperature correction device 5. The central control device 4 is used to control the power supply device 3 to be in the off state when no living body is detected in the distribution room and the temperature value is less than the preset temperature value. By combining living body detection and temperature monitoring, the central control device 4 can more accurately distinguish between fire and non-fire conditions, effectively avoiding the unnecessary activation of the HFC-227ea fire extinguishing system, protecting the safety of personnel and preventing unnecessary waste of resources. For example: Assume that the temperature correction device 5 in the distribution room detects that the temperature in the key area is 20°C, which is lower than the preset fire temperature threshold of 60°C, and the image acquisition device confirms that there is no living body in the distribution room through real-time video analysis. At this time, the central control device 4 will determine that the current situation does not require the activation of the HFC-227ea fire extinguishing system, and then control the power supply device 3 to maintain the off state, cut off the power connection with the gas release device 6, and prevent accidental spraying.

[0039] In another embodiment, for example, a power distribution room is unattended at night, and the indoor temperature is maintained at a suitable 25°C by the air conditioning system. If the system falsely alarms or the temperature correction device 5 reports an erroneous high temperature value due to a fault, and the temperature value is 70°C, which is higher than the preset fire temperature threshold of 60°C, the central control device 4 will cross-verify the information, that is, check whether a living body is detected in the image. If no living body is detected and the temperature value is greater than the preset temperature value, the power supply device 3 can be controlled to be in an energy supply state to avoid accidental spraying of HFC-227ea and causing harm to personnel.

[0040] Specifically, the system for preventing the accidental spraying of HFC-227ea in the power distribution room also includes: a temperature correction device 5, which is arranged in the power distribution room, and is used to detect the temperature value of the temperature-sensitive area in the power distribution room, and the central control device 4 is connected to the temperature correction device 5, and the central control device 4 is used to control the power supply device 3 to be in a closed state when the enable signal is not received and the temperature value is less than the preset temperature value. By monitoring the temperature change of the temperature-sensitive area and combining the enable signal of the metal induction box 2, the central control device 4 can more accurately determine whether the HFC-227ea accidental spraying system needs to be started, avoiding accidental spraying under non-fire conditions, thereby improving the safety and efficiency of the system.

[0041] The central control device 4 is used to control the power supply device 3 to be in a closed state when the enable signal is not received and the temperature value is less than the preset temperature value. Receiving the enable signal and the temperature value being less than the preset temperature value are the judgment conditions for the central control device 4 to control the power supply device 3 to be in a closed state, and both are indispensable. For example, in daily operation of a distribution room, the ambient temperature is stable at about 30°C, which is less than the preset temperature value. The equipment inside the distribution room works normally and there is no need to start the fire extinguishing system. When the metal induction box 2 detects the entry of the target object and sends an enable signal to the central control device 4; at this time, regardless of the temperature, the system will control the power supply device 3 to be in a closed state to ensure the safety of employees. If the employee forgets to trigger the enable signal of the metal induction box 2, and the temperature of the temperature-sensitive area in the distribution room begins to rise abnormally due to equipment overload and other reasons, such as rising to 50°C (lower than the preset fire temperature threshold such as 60°C). In this case, the temperature correction device 5 detects that the temperature rises but does not reach the fire threshold, and the central control device 4 does not receive the enable signal of the metal induction box 2, that is, it is considered that there is no one in the distribution room. The central control device 4 will continue to keep the power supply device 3 in the off state according to the preset conditions of temperature rise and the unmanned state, until the temperature value further rises to the preset fire threshold, and then control the power supply device 3 to start the energy supply state and start the gas release device 6 to release HFC-227ea gas to extinguish the fire.

[0042] It should be further explained that, even in the case of failure of the anti-misspraying system, the central control device 4 can still manually open the gas release device 6 through remote control to ensure the availability of the fire extinguishing equipment.

[0043] Specifically, the temperature sensitive area includes at least one of the battery room, relay, distribution cabinet, and transformer. By centrally monitoring key temperature sensitive areas, the necessity of activating the fire extinguishing system can be more accurately determined to avoid unnecessary resource consumption. The battery room, relay, distribution cabinet, and transformer are set as temperature sensitive areas for the following reasons:

[0044] (1) Equipment in these areas usually generates heat during operation, such as batteries during charging and discharging, transformers during load changes, and relays and distribution cabinets when current passes through them. Overheating is one of the common failure modes of these devices, and overheating may cause fires, so temperature monitoring in these areas is critical.

[0045] (2) Equipment such as battery rooms, relays, distribution cabinets, and transformers are very sensitive to temperature changes. For example, battery performance may decrease as temperature rises, and may even cause explosions under extreme conditions; excessively high transformer oil temperature may affect its insulation performance and increase the risk of fire. Therefore, timely monitoring of temperature changes in these areas can help identify potential fire hazards at an early stage.

[0046] (3) These areas are usually less visited by people in the distribution room, but once a fire occurs, the smoke and harmful gases generated may quickly spread throughout the distribution room, posing a serious threat to people entering in an emergency. Therefore, by monitoring the temperature-sensitive area, it can be ensured that the HFC-227ea fire extinguishing system is activated in time when a real fire occurs, and at the same time, the enable signal is used to confirm that no one is in the area, thereby protecting the safety of personnel.

[0047] In summary, monitoring the battery room, relays, distribution cabinets, and transformers as temperature-sensitive areas is based on consideration of potential fire risks, understanding of equipment characteristics, and optimization of personnel safety and resource utilization. This setting ensures that the system can effectively monitor the equipment in the distribution room that is most likely to cause a fire, improving the response efficiency and safety performance of the entire system.

[0048] Furthermore, the system for preventing accidental spraying of heptafluoropropane in the power distribution room also includes: a release warning device, which is electrically connected to the central control device 4, and is used to work when receiving the control command of the central control device 4, so that the release warning device can warn personnel before the gas release device 6 starts to release heptafluoropropane. The main function of the release warning device is to ensure that before the gas release device 6 starts to start, the personnel in the power distribution room can be notified or warned in time, giving them enough reaction time to evacuate safely or take necessary protective measures. This design not only enhances the safety of the system, but also reflects the importance attached to the life and health of personnel.

[0049] The release warning device is electrically connected to the central control device 4. When the release warning device receives the start-up command from the central control device 4, it will immediately send out an obvious alarm signal (such as a sound alarm, a flash alarm, etc.) to remind any personnel who may be in the distribution room that the release of HFC-227ea is about to begin. This helps personnel to quickly realize the danger and take action. Through early warning, the system provides personnel with a short time buffer, which is usually tens of seconds to one minute. During this period, personnel can quickly leave the distribution room to ensure that no one is in the room when the gas is released. At the same time, this is also a confirmation signal, reminding the central control device 4 to confirm that the personnel have safely evacuated after the warning, and then start the gas release device 6.

[0050] Furthermore, the system for preventing accidental spraying of HFC-227ea in the power distribution room also includes: an emergency ventilation device, which is electrically connected to the release warning device, and is used to control the ventilation duct to be connected to the external atmosphere when the release warning device is working.

[0051] The ventilation duct of the emergency ventilation device is connected to the outside atmosphere, which can quickly discharge the HFC-227ea in the room after the gas is released, providing air safety guarantee for people who may be stranded in the room before escape, preventing secondary damage caused by gas accumulation, and helping to restore the normal working environment in the distribution room.

[0052] The emergency ventilation device is electrically connected to the release warning device. When the HFC-227ea release warning signal is activated, the emergency ventilation device will also be activated, quickly opening the valve of the ventilation duct or starting the ventilation fan to communicate with the atmosphere outside the distribution room. This can introduce fresh air, increase the oxygen content, reduce the concentration of HFC-227ea, and reduce the risk of suffocation during the evacuation process. The electrical connection between the emergency ventilation device and the release warning device also ensures a linkage response between the two. Once the warning signal is issued, the emergency ventilation device is immediately activated without manual operation, realizing an automated safety protection mechanism.

[0053] Specifically, the central control device 4 is a PLC controller. Setting the central control device 4 as a PLC controller has the following effects:

[0054] (1) The PLC controller has high-speed processing capabilities and real-time control characteristics. It can quickly respond to various input signals (such as fire alarms, temperature changes, liveness detection, enable signals, etc.) and instantly execute corresponding output controls (such as cutting off power, starting warnings, controlling ventilation, etc.), ensuring the system's rapid response and efficient operation in emergency situations.

[0055] (2) PLC controllers are designed for industrial control environments and have high reliability and stability. They can continue to operate under harsh environmental conditions, such as extreme temperatures, vibrations, and electromagnetic interference. This ensures that in complex industrial environments such as distribution rooms, the central control device 4 can operate stably and is not easily affected by environmental factors and fails.

[0056] (3)PLC controllers support multiple programming languages, such as ladder diagrams, function block diagrams, and structured text, making it easy to develop and modify control logic. This flexibility allows the system to quickly adjust control strategies to suit specific working environments and requirements when faced with different distribution room layouts, equipment types, or safety requirements.

[0057] (4) PLC controllers are usually equipped with a rich set of interfaces and communication protocols, which can easily connect and exchange data with other devices. In this solution, the central control device 4 is electrically connected to the image acquisition device 1, the metal sensing box 2, the release warning device, the temperature correction device 5, and the gas release device 6 to form a complete and highly coordinated system. In addition, the modular design of PLC makes it easy to expand, and control modules can be flexibly added or adjusted according to the size of the distribution room, the number of equipment, or the increase in safety requirements, without the need to change the system architecture on a large scale.

[0058] In summary, the PLC controller is selected as the central control device 4 not only because of its excellent real-time control capability and reliability, but also because of its flexible programmability, easy integration and powerful fault diagnosis capabilities. These features together ensure the efficient, safe and stable operation of the HFC-227ea protection system in the distribution room in the face of various emergency situations.

[0059] Specifically, the target object is at least one of a key and an identity plate. By identifying the key or identity plate of the staff, the metal induction box 2 can ensure that only authorized personnel can enter the power distribution room, further improving the safety of the system. This design can effectively prevent unauthorized personnel from entering the power distribution room, avoid safety accidents caused by misoperation, and improve the safety management level of the power distribution room.

[0060] The metal induction box 2 usually contains one or more metal induction sensors, such as proximity sensors or RFID (radio frequency identification) readers. When an employee carries a target object (such as a special key or identity plate) into the distribution room and places these items in the metal induction box 2 in accordance with regulations, the sensor will detect the presence of the metal object. Once the target object is detected, the metal induction box 2 will send an enable signal to the central control device 4. After receiving the enable signal, the central control device 4 will immediately take measures, such as cutting off the power supply of the heptafluoropropane gas release device 6 to prevent accidental spraying of gas when someone is present, ensuring the safety of personnel. As long as the target object remains in the metal induction box 2, the metal induction box 2 will continue to send signals to the central control device 4, and the system control power supply device 3 is in the off state. Once the employee removes the target object, the signal is interrupted, and the central control device 4 re-evaluates whether to restore the power supply of the gas release device 6 based on the data of other sensors (such as the temperature correction device 5) to deal with possible fire risks.

[0061] Figure 1 The overall structure of the system for preventing accidental injection of HFC-227ea in the power distribution room of the present application is shown, and the connection relationship between the image acquisition device 1, the metal sensing box 2, the power supply device 3, the central control device 4, the temperature correction device 5 and the gas release device 6 is clearly depicted in the figure.

[0062] The image acquisition device 1 is arranged on the top of the distribution room, which can fully cover the internal space of the distribution room to ensure that the collected image information is exhaustive. The metal induction box 2 is placed at the entrance of the distribution room, and has the ability to detect the keys or identity badges carried by the personnel entering the distribution room. Its design is intended to enhance the system's real-time perception of personnel entering. The power supply device 3 is electrically connected to the gas release device 6. Its core function is to supply power to the gas release device 6 to start the release process of heptafluoropropane. At the same time, the power supply device 3 can also enter the closed state according to the command of the central control device 4, cut off the power supply to the gas release device 6, thereby avoiding the occurrence of accidental spraying, or enter the power supply state according to the command of the central control device 4, open the gas release device 6, and quickly extinguish the fire when a fire occurs in the distribution room. The temperature correction device 5 is electrically connected to the central control device 4. The temperature correction device 5 sends the temperature signals of multiple monitored temperature-sensitive areas to the central control device 4. When the enable signal is not received and the temperature value is less than the preset temperature value, and / or when no living body is detected in the distribution room and the temperature value is less than the preset temperature value, the central control device 4 ensures that the power supply device 3 is in a closed state, thereby avoiding the occurrence of accidental spraying.

[0063] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0064] 1. Through the dual detection mechanism of the image acquisition device and the metal sensing box, it can effectively detect whether there are people or living things in the distribution room. According to the detection situation, the central control device can control the power supply device to switch between the power supply state and the shutdown state, thereby ensuring that heptafluoropropane is released only when there is no one, avoiding the risk of suffocation of people. This solution solves the problem of casualties caused by accidental spraying of heptafluoropropane fire extinguishing devices in the prior art.

[0065] 2. The central control device can achieve remote monitoring and avoid human intervention. When no one is around and the fire alarm is triggered, the system can accurately and promptly start the HFC-227ea fire extinguishing system to effectively control the fire. Even if the anti-misspraying system fails, the central control device can still manually open the gas release device through remote control to ensure the availability of the fire extinguishing equipment, further improving the safety and reliability of the system.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0067] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0068] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A system for preventing accidental spraying of heptafluoropropane in a power distribution room, characterized in that: include: An image acquisition device (1), the image acquisition device (1) being arranged in a power distribution room, the image acquisition device (1) having an acquisition mode for acquiring images in the power distribution room; A metal induction box (2), the metal induction box (2) being arranged in the power distribution room, the metal induction box (2) having a working state of sending an enabling signal when detecting that a target object enters; A power supply device (3), the power supply device (3) being electrically connected to the gas release device (6), the power supply device (3) having a power supply state for providing electric energy to the gas release device (6), and the power supply device (3) having a shutdown state for stopping supplying electric energy to the gas release device (6); A central control device (4), the central control device (4) being electrically connected to the image acquisition device (1), the metal sensing box (2) and the gas release device (6), the central control device (4) being used for controlling the power supply device (3) to be in the power supply state and the shutdown state according to at least one of the image acquired by the image acquisition device (1) and the enable signal sent by the metal sensing box (2).

2. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 1, characterized in that: The central control device (4) is used to perform living body detection based on the image, and the central control device (4) is used to control the power supply device (3) to be in the off state when detecting the presence of a living body in the power distribution room.

3. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 1, characterized in that: The central control device (4) is used to control the power supply device (3) to be in the off state when receiving the enable signal.

4. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 1, characterized in that: The power distribution room protection system for preventing accidental injection of HFC-227ea also includes: a temperature correction device (5), the temperature correction device (5) being arranged in the power distribution room, the temperature correction device (5) being used to detect the temperature value of a temperature sensitive area in the power distribution room, the central control device (4) being electrically connected to the temperature correction device (5), the central control device (4) being used to control the power supply device (3) to be in the off state when no living body is detected in the power distribution room and the temperature value is less than a preset temperature value.

5. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 1, characterized in that: The power distribution room protection system for preventing accidental injection of HFC-227ea also includes: a temperature correction device (5), the temperature correction device (5) being arranged in the power distribution room, the temperature correction device (5) being used to detect the temperature value of a temperature sensitive area in the power distribution room, the central control device (4) being electrically connected to the temperature correction device (5), the central control device (4) being used to control the power supply device (3) to be in the off state when the enable signal is not received and the temperature value is less than a preset temperature value.

6. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 4 or 5, characterized in that: The temperature sensitive area includes at least one of a battery room, a relay, a power distribution cabinet, and a transformer.

7. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 1, characterized in that: The power distribution room protection system for preventing accidental spraying of heptafluoropropane further comprises: a release warning device, the release warning device being electrically connected to the central control device (4), the release warning device being configured to operate upon receiving a control instruction from the central control device (4), so that the release warning device issues a personnel warning before the gas release device (6) starts releasing heptafluoropropane.

8. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 7, characterized in that: The distribution room protection system for preventing accidental spraying of HFC-227ea also includes: an emergency ventilation device, which is electrically connected to the release warning device, and is used to control the ventilation duct to be connected to the external atmosphere when the release warning device is working.

9. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 1, characterized in that: The central control device (4) is a PLC controller.

10. The system for preventing accidental injection of heptafluoropropane in a power distribution room according to claim 1, characterized in that: The target object is at least one of a key and an identity plate.

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