Monitoring of fire extinguishing systems and leakage current sensors

Abstract

The present application relates to a monitoring fire extinguishing system and a leakage current sensor. The monitoring fire extinguishing system includes: a fire monitoring and fire extinguishing device, and a terminal box; the fire monitoring and fire extinguishing device includes a state detection unit and a fire extinguishing unit; the fire extinguishing unit includes a fire extinguishing agent and a temperature switch; the state detection unit includes a leakage current detection module; the terminal box is connected to the temperature switch and the state detection unit respectively. When the temperature in the electrical device is high, the fire extinguishing agent can be automatically ignited to release the fire extinguishing medium, automatically extinguishing the fire, and at the same time, the temperature switch generates a closed signal to indicate the burning state of the fire extinguishing agent; the state detection unit can at least detect the leakage current state of the electrical device through the leakage current detection module. In addition, the leakage current detection module adopts a three-magnetic ring detection structure to improve the shielding effect against large current interference, and the multi-turn coil improves the detection sensitivity, which can detect the leakage current situation in a timely and accurate manner. Thereby improving the fire monitoring efficiency of electrical equipment.

Description

Technical Field

[0001] The present application relates to the field of fire safety technology, and in particular to a monitoring fire extinguishing system and a leakage current sensor. Background Art

[0002] For electrical installations equipped with electrical components, the safety of electrical components and circuits cannot be ignored. Once electrical faults such as short circuit, overload, overheating, leakage, poor contact, etc. occur in electrical components or circuits, electrical fires may occur, resulting in serious property losses and even threatening the lives of relevant personnel.

[0003] Among them, fires caused by leakage are more hidden, and it is difficult to find the real cause after the fire (covered by illusions such as short circuits), so the harm is greater.

[0004] Existing leakage current sensors are all common current transformers. However, during electrical equipment operation, the load current is often hundreds or even thousands of amperes, while the leakage current is often very small, usually in the milliampere range. The magnetic field generated by the strong load current can easily interfere with the signal collected by the current transformer, resulting in false alarms. Many users reduce false alarms by raising the alarm threshold, but this also reduces sensitivity. When leakage current actually occurs, the alarm cannot be issued in a timely manner, thus failing to accurately detect leakage current and providing early warning of fire accidents. Summary of the Invention

[0005] The present application provides a monitoring fire extinguishing system and a leakage current sensor, which realizes the accurate detection of leakage current. When an electrical device fails or a fire occurs, the system can automatically extinguish the fire and alarm, so that relevant personnel can accurately know the internal conditions of the electrical device and make timely responses.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a monitoring and fire extinguishing system for monitoring the real-time conditions in an electrical device and automatically extinguishing the fire and issuing an alarm when a fire occurs in the electrical device, the system comprising: a fire monitoring and extinguishing device, a terminal box;

[0008] The fire monitoring and extinguishing device is arranged inside the electrical device and includes a status detection unit and a fire extinguishing unit;

[0009] The fire extinguishing unit includes a fire extinguishing agent and a temperature switch, and is used to automatically ignite the fire extinguishing agent when the temperature in the electrical device reaches the ignition point of the fire extinguishing agent, so that the fire extinguishing agent burns to generate a fire extinguishing medium, thereby extinguishing the fire, and close the temperature switch to send a closing signal to the terminal box;

[0010] The state detection unit is used to detect the state of the electrical device and send the detected state signal to the terminal box;

[0011] The state detection unit includes a leakage current detection module for detecting milliampere leakage current; the leakage current detection module includes a signal processing unit and three magnetic rings; the three magnetic rings have the same center and different radii; the three magnetic rings are filled with insulating material; each of the magnetic rings is evenly wound with a plurality of turns of coils, and the terminals of the coils are connected to the signal processing unit; the signal processing unit is used to receive the leakage current signals collected by the coils on the three magnetic rings, calculate and determine the actual leakage current value, and send a leakage current alarm signal to the terminal box when the actual leakage current value is higher than a preset leakage current threshold; the state signal includes the leakage current alarm signal;

[0012] The terminal box is connected to the temperature switch and the status detection unit respectively, and is used to analyze the status of the electrical device when receiving the closing signal and / or the status signal, and to issue an alarm when it is determined that the status of the electrical device is abnormal.

[0013] Optionally, the state detection unit further includes: a temperature detection module, a smoke detection module, and a water immersion detection module;

[0014] The temperature detection module is used to detect the temperature of the electrical device, and when the temperature of the electrical device is higher than a preset temperature threshold, send a temperature alarm signal to the terminal box;

[0015] The smoke detection module is used to detect the smoke concentration in the electrical device and send a smoke alarm signal to the terminal box when the smoke concentration in the electrical device is higher than a preset smoke concentration threshold;

[0016] The water immersion detection module is used to detect whether the electrical device is flooded, and when the electrical device is flooded, sends a water immersion alarm signal to the terminal box;

[0017] The status signal includes the temperature alarm signal, the smoke alarm signal, and the water immersion alarm signal.

[0018] Optionally, the system further comprises: an alarm control host;

[0019] The alarm control host is connected to the terminal box;

[0020] The terminal box is further used to send a danger signal to the alarm control host; the danger signal includes the closing signal and / or the status signal;

[0021] The alarm control host is used to receive the danger signal sent by the terminal box, issue an alarm, and upload the alarm information to the cloud host computer management system, which processes the alarm information.

[0022] Optionally, the distance between the terminal box and the electrical device is less than a preset distance; the terminal box further includes a positioning module for generating positioning information of the terminal box;

[0023] When the terminal box sends a danger signal to the alarm control host, the terminal box is specifically configured to combine the positioning information with the danger signal to generate a first danger signal, and send the first danger signal to the alarm control host;

[0024] When the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to perform data analysis on the first danger signal to obtain the positioning information and the danger signal, and combine the distance between the terminal box and the electrical device to determine the location information and status information of the electrical device and issue an alarm.

[0025] Optionally, the distance between the terminal box and the electrical device is less than a preset distance; the terminal box further comprises a numbering module for generating numbering information of the terminal box;

[0026] When the terminal box sends a danger signal to the alarm control host, the terminal box is specifically configured to combine the number information with the danger signal to generate a second danger signal, and send the second danger signal to the alarm control host;

[0027] When the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to perform data analysis on the second danger signal to obtain the number information and the danger signal, and match the number information with a preset number table to determine the location information of the terminal box; determine the location information and status information of the electrical device according to the distance between the terminal box and the electrical device, and issue an alarm;

[0028] The number table includes the numbers of the terminal boxes and the position information corresponding to the terminal boxes.

[0029] Optionally, the alarm control host includes a display;

[0030] When the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to display the location information and status information of the electrical device on the display.

[0031] Optionally, when the terminal box determines that the electrical device is in an abnormal state and issues an alarm, it is specifically configured to:

[0032] When it is determined that the state of the electrical device is abnormal, an alarm is issued using a corresponding alarm mode according to the type of the abnormal state.

[0033] Optionally, when the terminal box determines that the electrical device is in an abnormal state and issues an alarm, it is specifically configured to:

[0034] When it is determined that the state of the electrical device is abnormal, an alarm is issued using a corresponding alarm mode according to the number of received abnormal signals.

[0035] Optionally, the system further includes a mobile terminal;

[0036] When the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to send the location information and status information of the electrical device to the mobile terminal for display.

[0037] In the second aspect, the present application provides a leakage current sensor, comprising: a signal processing unit, three magnetic rings; the three magnetic rings have the same center and different radii; the three magnetic rings are filled with insulating material; each of the magnetic rings is evenly wound with a number of turns of coils, and the terminals of the coils are connected to the signal processing unit; the signal processing unit is used to receive the leakage current signals collected by the coils on the three magnetic rings, and perform calculations to determine the actual leakage current value.

[0038] The monitoring fire extinguishing system provided by the present application includes: a fire monitoring and extinguishing device, and a terminal box; the fire monitoring and extinguishing device is arranged inside the electrical device, and includes a state detection unit and a fire extinguishing unit; the fire extinguishing unit includes a fire extinguishing agent and a temperature switch, which is used to automatically ignite the fire extinguishing agent when the temperature in the electrical device reaches the ignition point of the fire extinguishing agent, so that the fire extinguishing agent burns to generate a fire extinguishing medium, thereby extinguishing the fire, and close the temperature switch to send a closing signal to the terminal box; the state detection unit is used to detect the state of the electrical device and send the detected state signal to the terminal box; the state detection unit includes a leakage current detection module for detecting milliampere leakage current; the leakage current detection module includes a signal processing unit, three magnetic rings; the three The magnetic rings have the same center and different radii; an insulating material is filled between the three magnetic rings; each magnetic ring is evenly wound with a plurality of coil turns, and the terminals of the coils are connected to the signal processing unit; the signal processing unit is configured to receive leakage current signals collected by the coils on the three magnetic rings, calculate and determine an actual leakage current value, and send a leakage current alarm signal to the terminal box when the actual leakage current value exceeds a preset leakage current threshold; the status signal includes the leakage current alarm signal; the terminal box is respectively connected to the temperature switch and the status detection unit, and is configured to analyze the status of the electrical device upon receiving the closing signal and / or the status signal, and to issue an alarm if the electrical device status is abnormal. When the temperature in the electrical device is high, a fire extinguishing agent can be automatically ignited to release a fire extinguishing medium, automatically extinguishing the fire, and the temperature switch generates a closing signal indicating the combustion status of the fire extinguishing agent; the status detection unit can detect the leakage current status of the electrical device through at least a leakage current detection module. The closing signal and the leakage current alarm signal can be directly sent to the terminal box, allowing relevant personnel to accurately understand the internal conditions of the electrical device and take timely action. In addition, the leakage current detection module uses a three-magnetic ring detection structure to enhance shielding against high current interference. The multi-turn coil increases detection sensitivity, enabling timely and accurate detection of leakage current. This improves the efficiency of electrical equipment fire monitoring and allows for timely firefighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0040] Figure 1 A schematic structural diagram of a monitoring fire extinguishing system provided in one embodiment of the present application;

[0041] Figure 2 A schematic structural diagram of a leakage current sensor provided in one embodiment of the present application;

[0042] Figure 3 A schematic structural diagram of another fire extinguishing monitoring system provided in one embodiment of the present application;

[0043] Figure 4 A schematic structural diagram of a fire monitoring and extinguishing device provided in one embodiment of the present application;

[0044] Figure 5 A schematic diagram of the structure of a fire monitoring host provided in one embodiment of the present application;

[0045] Figure 6 This is an architectural diagram of fire management software provided in one embodiment of the present application. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] In this document, the term "and / or" simply describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates an "or" relationship between the related objects.

[0048] The embodiments of the present application are described in further detail below with reference to the accompanying drawings.

[0049] Electrical installations typically contain a variety of components. Faults such as short circuits, overloads, overheating, leakage, or poor contact in these components or wiring can cause electrical fires, resulting in significant property damage and even life-threatening situations. Furthermore, electrical fires in electrical cabinets often go undetected, making manual firefighting difficult once the fire has spread. This can easily lead to the destruction of entire cabinets, power outages, and, in severe cases, even ignition of the entire building, resulting in casualties and extremely serious consequences. Therefore, the safety of electrical installations cannot be ignored.

[0050] At the same time, fires caused by leakage currents continue to occur. These fires are more hidden than those caused by short circuits, and the true cause is difficult to identify after a fire breaks out (because they are often masked by false appearances such as short circuits), making them even more dangerous. A careful analysis revealed that when using conventional leakage current sensors to monitor leakage current in the switchgear main circuit, the main circuit load current is relatively high, typically several hundred amperes, but the leakage current is generally relatively small. Existing leakage current sensors have high alarm thresholds and are severely affected by high line current interference, resulting in inaccurate alarms and even frequent false alarms. Therefore, it is necessary to develop a leakage current sensor with high sensitivity and strong interference resistance.

[0051] Currently, there are usually the following technical solutions for electrical fires:

[0052] (1) Smoke and temperature alarm systems are installed in the electrical room; however, this system is designed for fires in large spaces. Once a fire alarm is received, the fire is usually already large and difficult to control, resulting in significant losses.

[0053] (2) Install a gas fire extinguishing system, dry powder fire extinguishing system or water mist spraying system for the entire electrical control room; these two solutions are independent and work separately. The alarm system signal is used to indicate the fire situation and to start the fire extinguishing system at the same time; however, the above technology has a flaw. It can only trigger the fire alarm system to alarm after the fire becomes larger, and then trigger the fire extinguishing system to work; it targets the entire room and the entire area; the startup is relatively slow, and there is a serious lag compared to the fire ignition time, which has the risk of the fire spreading; the cost of starting the fire extinguishing system once is also relatively high, and the impact is relatively large;

[0054] (3) Fire detection tube is a fire extinguishing device installed inside the electrical cabinet. It stores fire extinguishing media such as HFC-227ea or carbon dioxide in a cylinder container and uses a plastic tube to arrange it inside the electrical cabinet. When a fire occurs, the flame temperature melts the plastic tube, and the pressurized fire extinguishing gas stored in the tube is released, forming a fire extinguishing space inside the electrical cabinet, diluting oxygen and suffocating the fire. One defect of this technology is that it cannot monitor the fire situation inside the electrical cabinet in real time, and the operation and maintenance personnel cannot grasp the corresponding fire danger in time. At the same time, the plastic tube is at risk of aging and is easily damaged by external forces, resulting in malfunction.

[0055] (4) Install fire extinguishing stickers inside electrical devices. Utilizing the fact that the temperature rises when a fire occurs in an electrical device, the fire extinguishing agent in the stickers is ignited and the fire extinguishing medium in the stickers is released to extinguish the fire. Currently, most fire extinguishing stickers used on the market are installed in electrical devices, which are closed. Relevant personnel cannot be sure of timely information about the internal situation of the fire extinguishing stickers in the electrical devices. In addition, there is no function for real-time detection and monitoring of the situation inside the electrical cabinet, and it is impossible to transmit fire signals to the outside world. Operators cannot know the real-time situation inside the electrical cabinet and the real-time status of the fire extinguishing stickers. Fire extinguishing stickers can only extinguish fires when they occur, and cannot provide early warnings before a fire occurs. Fire extinguishing agents generally have an expiration date and need to be replaced after expiration. Because there is no monitoring system, operators often fail to replace them in time due to negligence, which puts the electrical cabinet at risk.

[0056] To address the above issues, this application provides a monitoring fire extinguishing system and leakage current sensor. These systems are used to monitor the real-time status of electrical devices and automatically extinguish fires and provide audible and visual alarms when a fire occurs. Furthermore, they improve the accuracy of leakage current detection, targeting the most challenging situations where leakage current can cause fires.

[0057] Figure 1 This is a structural diagram of a monitoring fire extinguishing system provided in one embodiment of the present application. Figure 1 As shown, the monitoring and fire extinguishing system includes a fire monitoring and fire extinguishing device 1 and a terminal box 2.

[0058] The fire monitoring and extinguishing device is arranged inside the electrical device and includes a fire extinguishing unit 11 and a status detection unit 12;

[0059] The fire extinguishing unit 11 is arranged inside the electrical device, and includes a fire extinguishing agent 111 and a temperature switch 112. When the temperature in the electrical device reaches the ignition point of the fire extinguishing agent, the fire extinguishing agent is automatically ignited to burn and generate a fire extinguishing medium, thereby extinguishing the fire, and the temperature switch is closed to send a closing signal to the terminal box.

[0060] The status detection unit 12 is used to detect the status of the electrical device and send the detected status signal to the terminal box 2.

[0061] The terminal box is directly connected to the fire monitoring and extinguishing device using a multi-core signal cable. Specifically, the terminal box 2 is connected to the temperature switch 112 and the status detection unit 12 respectively; upon receiving the closing signal and / or the status signal, it analyzes the status of the electrical device and issues an alarm if the electrical device status is abnormal.

[0062] The state detection unit 12 includes a leakage current detection module 121 .

[0063] Specifically, when the temperature in the electrical device reaches the ignition point of the fire extinguishing agent, the fire extinguishing agent will be automatically ignited, burning to generate a fire extinguishing medium, and the fire will be extinguished through the fire extinguishing medium.

[0064] In some preferred implementations, the fire extinguishing agent can be ignited via a temperature-sensitive fuse, allowing the agent to ignite at different temperatures by using different temperature-sensitive fuses. Specifically, when the temperature in the electrical equipment reaches the ignition point of the temperature-sensitive fuse, the temperature-sensitive fuse automatically ignites, thereby igniting the fire extinguishing agent. The fire extinguishing agent burns, releasing the fire extinguishing medium and extinguishing the fire. The fire extinguishing agent is primarily composed of a redox agent, primarily strontium nitrate and potassium nitrate, along with appropriate proportions of fire extinguishing efficiency enhancers, modifiers, and other substances.

[0065] The temperature switch is used to close when the temperature in the electrical device reaches an action value of the temperature switch, and send a closing signal to the terminal box.

[0066] The action value of the temperature switch refers to the temperature value at which the temperature switch quickly operates due to internal stress generated by heat.

[0067] Specifically, when the temperature in the electrical device reaches a certain temperature, the temperature switch will quickly operate due to the internal stress generated by the heat, changing from open to closed, or from closed to open. The temperature at this time is the operating value of the temperature switch.

[0068] In this embodiment, when the electrical device operates normally, the temperature switch is in an open state. When the temperature in the electrical device reaches the action value of the temperature switch, the temperature switch closes and sends a closing signal to the terminal box.

[0069] In some preferred implementations, the temperature switch's operating value can be aligned with the ignition point of the fire extinguishing agent. When the temperature in the electrical device reaches the ignition point of the fire extinguishing agent, the fire extinguishing agent automatically ignites and releases the extinguishing medium to extinguish the fire. Simultaneously, the temperature switch quickly closes and sends a closing signal to the terminal box. Therefore, by detecting whether the terminal box receives the closing signal, it is possible to monitor whether the fire extinguishing agent has ignited.

[0070] The leakage current detection module 121 may use the leakage current sensor provided by this application. Figure 2As shown, the leakage current sensor includes a signal processing unit 1211 and three magnetic rings; the three magnetic rings have the same center and different radii, forming three layers of an inner ring 1212, a middle ring 1213, and an outer ring 1214 respectively; the three magnetic rings are filled with insulating material; each of the magnetic rings is evenly wound with a number of turns of coils, and the terminals of the coils are connected to the signal processing unit; the signal processing unit is used to receive the leakage current signals collected by the coils on the three magnetic rings, and perform calculations to determine the actual leakage current value, and when the actual leakage current value is higher than a preset leakage current threshold, send a leakage current alarm signal to the terminal box; the status signal includes the leakage current alarm signal.

[0071] The current sensor of this embodiment includes three high-performance iron cores, and has a better effect of isolating large current interference than ordinary leakage sensors.

[0072] Preferably, each magnetic ring can be wound with 1000 turns of wire. The coil can be a single strand of enameled wire with a wire diameter of 0.1 mm to 1.0 mm. A 1000-turn coil can increase the sensitivity of current sensing and further enhance the accuracy of leakage current detection.

[0073] During the production process, three magnetic rings can be placed in a circular container (the container material can be stainless steel, carbon steel plate, or insulating resin casting), the three magnetic rings are fixed in position with appropriate insulating non-metallic materials, and then cast with insulating resin.

[0074] The signal processing unit calculates the arithmetic average of the leakage currents collected by the coils on the three magnetic rings, multiplies the average by the number of winding turns (corresponding to 1000 turns in the above example, it needs to be multiplied by 1000 times) to obtain the actual sensed leakage current value.

[0075] The actual leakage current value refers to the sum of the currents in the three-phase lines of the electrical device. Specifically, a leakage current detection device is provided inside the electrical device. When the electrical device is operating normally, the currents in the three-phase lines of the electrical device are in a balanced state. At this time, the sum of the currents in the three-phase lines is zero, and the leakage current detection device cannot detect leakage current. When the electrical device fails, the current balance in the three-phase lines of the electrical device is broken. At this time, the sum of the currents in the three-phase lines is no longer zero. At this time, the leakage current detection device can detect the leakage current value. When the leakage current value is higher than a pre-set leakage current threshold, it indicates that the electrical device may have failed and there is a risk of fire. The leakage current detection device then sends a leakage current alarm signal to the terminal box to alert relevant personnel.

[0076] In some implementations, the leakage current detection module can use a leakage current sensor to detect whether there is leakage current in the electrical device. Specifically, the three-phase wires in the electrical device can be passed through the leakage current sensor. When the electrical device fails, the sum of the currents in the three-phase wires in the electrical device is no longer zero. At this time, the leakage current sensor can detect the leakage current value. When the leakage current value detected by the leakage current sensor is higher than a preset leakage current threshold, it indicates that the electrical device has failed, and a leakage current alarm signal is sent to the terminal box.

[0077] The leakage current sensor involved in this embodiment utilizes a special shielding structure and measurement parameter verification scheme to address the interference of large currents on small leakage current signals. This enhances the shielding effect against large current interference. The multi-turn coil improves detection sensitivity, and parameter averaging verification enhances the accuracy and sensitivity of leakage current measurement, facilitating timely and accurate detection of leakage current conditions. This improves the safety management of electrical equipment.

[0078] In some embodiments, the status detection unit further includes: a temperature detection module, a smoke detection module, and a water immersion detection module; the temperature detection module is used to detect the temperature in the electrical device, and when the temperature in the electrical device is higher than a preset temperature threshold, a temperature alarm signal is sent to the terminal box; the smoke detection module is used to detect the smoke concentration in the electrical device, and when the smoke concentration in the electrical device is higher than a preset smoke concentration threshold, a smoke alarm signal is sent to the terminal box; the water immersion detection module is used to detect whether the electrical device is flooded, and when water is present in the electrical device, a water immersion alarm signal is sent to the terminal box; the status signal includes the temperature alarm signal, the smoke alarm signal, and the water immersion alarm signal.

[0079] Specifically, since the temperature will rise when a fire occurs in an electrical device, a temperature threshold can be set in advance. That is, when the temperature detection module detects that the temperature in the electrical device is higher than the temperature threshold, it means that the temperature in the electrical device is abnormal and a fire may have occurred. Therefore, the temperature detection module sends a temperature alarm signal to the terminal box to warn relevant personnel.

[0080] In some implementations, the temperature detection module may use a temperature sensor to detect the temperature in the electrical device, and send a temperature alarm signal to the alarm module when the temperature in the electrical device is higher than a preset temperature threshold.

[0081] Specifically, since smoke is usually generated when a fire occurs in an electrical device, a smoke concentration threshold can be set in advance. That is, when the smoke concentration in the electrical device detected by the smoke detection module is higher than the smoke concentration threshold, it indicates that a fire may have occurred in the electrical device. Therefore, the concentration detection module sends a smoke alarm signal to the terminal box to warn relevant personnel.

[0082] In some implementations, the smoke detection module may use a smoke sensor to detect the occurrence of smoke in the electrical device, and send a smoke alarm signal to the alarm module when the smoke concentration in the electrical device is higher than a preset smoke concentration threshold.

[0083] In some implementations, the terminal box can provide an audible and visual alarm. Specifically, the terminal box includes a built-in light and speaker. When it receives a closing signal, a temperature alarm signal, or a smoke alarm signal, the light and speaker automatically turn on and sound an audible and visual alarm to alert personnel of an electrical device anomaly.

[0084] When an electrical device fails and locally overheats, and the temperature rises, the temperature sensor will issue a temperature abnormality signal alarm; if the fault continues to develop and then causes fire smoke, the smoke alarm signal will be triggered and a smoke alarm will be issued; if the temperature rises to above 175°C, the thermal wire will be triggered, triggering the fire extinguishing agent of the autonomous fire extinguishing unit, releasing fire extinguishing gas (mainly nitrogen and carbon dioxide) to automatically extinguish the fire. At the same time, the temperature switch generates a closing signal to indicate the combustion status of the fire extinguishing agent.

[0085] By integrating a temperature switch, a leakage current detection module, a temperature detection module, a smoke detection module, and a water immersion detection module, the fire monitoring and fire extinguishing device can integrate multiple physical parameters as a reference to improve the accuracy of the judgment of the fire scene situation, and automatically extinguish the fire by automatically igniting the fire extinguishing agent to release the fire extinguishing medium; at the same time, an accurate alarm signal is sent to the terminal box to form a monitoring and fire extinguishing system, realizing automatic alarm, so that relevant personnel can accurately know the internal situation of the electrical device and make timely responses.

[0086] In some scenarios, the above-mentioned monitoring fire extinguishing system also includes: an alarm control host; the alarm control host is connected to the terminal box; the terminal box is also used to send a danger signal to the alarm control host; the danger signal includes the closing signal and / or the status signal; the alarm control host is used to receive the danger signal sent by the terminal box and issue an alarm.

[0087] Specifically, the terminal box can be wirelessly connected to the alarm control host. When the terminal box receives the closing signal and / or the status signal, the terminal box will sound an alarm and simultaneously send the received signal as a danger signal to the alarm control host. The alarm control host will also sound an alarm after receiving the danger signal. Therefore, when a fire occurs in an electrical device, a linked alarm can be achieved between devices, thereby realizing a multi-terminal alarm.

[0088] In some specific implementations, the terminal box can be set at a location close to the electrical device. Through the alarm of the terminal box, the on-duty personnel near the electrical device can accurately know the current situation of the electrical device; and the alarm control host can be set at a location far away from the electrical device, such as a monitoring room, office, etc., so that the management personnel can accurately know the current situation of the electrical device; the terminal box and the alarm control host can be connected through wireless communication, such as WiFi, Bluetooth LAN, etc.

[0089] In some embodiments, the distance between the terminal box and the electrical device is less than a preset distance; the terminal box also includes a positioning module for generating positioning information of the terminal box; when the terminal box sends a danger signal to the alarm control host, it is specifically used to combine the positioning information with the danger signal to generate a first danger signal, and send the first danger signal to the alarm control host; when the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to perform data analysis on the first danger signal to obtain the positioning information and the danger signal, and in combination with the distance between the terminal box and the electrical device, determine the location information and status information of the electrical device, and issue an alarm.

[0090] The status information refers to the status parameters of the electrical device when a fault or fire occurs, such as temperature, smoke concentration, time, etc.

[0091] Specifically, when the alarm control host receives the first danger signal, it performs data analysis on the first danger signal to determine the location information of the terminal box and the status information of the electrical device corresponding to the first danger signal. Because the distance between the terminal box and the electrical device is less than a preset distance, the location information of the terminal box can be used to determine the location information and status information of the electrical device. This allows relevant personnel to accurately know the location and current status of the electrical device and take appropriate measures.

[0092] In other embodiments, the distance between the terminal box and the electrical device is less than a preset distance; the terminal box also includes a labeling module for generating numbering information of the terminal box; when the terminal box sends a danger signal to the alarm control host, it is specifically used to combine the numbering information with the danger signal to generate a second danger signal, and send the second danger signal to the alarm control host; when the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to perform data analysis on the second danger signal to obtain the numbering information and the danger signal, and correspond the numbering information with a preset numbering table to determine the location information of the terminal box; according to the distance between the terminal box and the electrical device, the location information and status information of the electrical device are determined, and an alarm is issued; wherein, the numbering table includes the number of the terminal box and the location information corresponding to the terminal box.

[0093] Specifically, the terminal boxes can be pre-numbered and stored in a numbering module. The location information of the terminal boxes and their numbers are associated one-to-one to generate a numbering table, which is then stored in the alarm control host. When the alarm control host receives the second danger signal, it performs data analysis on the second danger signal to determine the number of the terminal box corresponding to the danger signal. Using the numbering table and the numbering information, it determines the location of the terminal box and, based on the distance between the terminal box and the electrical device, the location and status of the electrical device.

[0094] By determining the location and status information of the electrical device, relevant personnel can accurately know the location and current status of the electrical device where the fire occurred, so as to take corresponding measures.

[0095] In some scenarios, a terminal box is connected to a uniquely designated electrical device, and an alarm control panel can be connected to multiple terminal boxes.

[0096] Specifically, a terminal box can only receive the closure signal and / or status signal sent by the fire monitoring and extinguishing device and status detection unit in a single designated electrical device, while the alarm control host can receive danger signals from multiple terminal boxes. This connection method achieves the effect of precise alarming from the terminal box and macro-monitoring from the alarm control host.

[0097] In other scenarios, the above-mentioned alarm control host may also include: a display screen. Specifically, by pre-importing a three-dimensional model of the environment where the electrical device is located in the alarm control host and integrating the aforementioned location information and status information, the specific location of the electrical device can be displayed on the three-dimensional model, and when the alarm control host receives an input instruction to view the status information of a certain electrical device, the display screen can display the status information corresponding to the electrical device, making it easier for relevant personnel to view and manage the electrical device. For example, when the mouse cursor clicks on the icon of a certain electrical device on the display screen, the display screen will display the status information corresponding to the electrical device; or, the number of a certain electrical device can be entered through a pop-up window, and the alarm control host will correspond to the status information of the electrical device through the number.

[0098] In some embodiments, when the terminal box determines that the state of the electrical device is abnormal and issues an alarm, it is specifically used to: when determining that the state of the electrical device is abnormal, issue an alarm using a corresponding alarm mode according to the type of abnormal state.

[0099] Specifically, since the terminal box can receive five types of signals, namely closing signal, temperature alarm signal, smoke alarm signal, leakage current alarm signal, and water immersion alarm signal, the alarm method can be divided according to the type of signal, so that the corresponding alarm mode can be used for a certain type of signal to alarm, so that relevant personnel can accurately know the current situation of the electrical device.

[0100] In some specific implementations, when the danger signal received by the terminal box is only a temperature alarm signal, it enters the second-level warning mode, indicating that only the temperature in the electrical device is abnormal; when the danger signal received by the terminal box is a temperature alarm signal and a leakage current alarm signal, it enters the first-level warning mode, indicating that the electrical device may have a fault and there is a risk of fire; when the danger signal received by the terminal box is a temperature alarm signal, a leakage current alarm signal and a smoke alarm signal, it enters the second-level alarm mode, indicating that there is a high probability of a fire in the electrical device at this time; when the danger signal received by the terminal box is a temperature alarm signal, a leakage current alarm signal, a smoke alarm signal and a closing signal, it enters the first-level alarm mode, indicating that a fire has occurred in the electrical device, and the fire monitoring and fire extinguishing device has performed emergency automatic fire extinguishing processing.

[0101] In other specific implementations, the terminal box's alarm mode is set to light alarm. If the terminal box receives a temperature alarm signal, it can enter temperature alarm mode, flashing a yellow light to alert personnel that the electrical device's temperature is abnormal. If the terminal box receives a smoke alarm signal, it can enter smoke alarm mode, flashing a blue light to alert personnel that the electrical device's smoke concentration is abnormal and may be faulty. If the terminal box receives a closing signal or a leakage current alarm signal, the process is similar to the above and will not be repeated here.

[0102] In other embodiments, when the terminal box determines that the state of the electrical device is abnormal and issues an alarm, it is specifically used to: when determining that the state of the electrical device is abnormal, issue an alarm using a corresponding alarm mode according to the number of abnormal signals received.

[0103] Specifically, since the terminal box can receive one or more of the closing signal, temperature alarm signal, smoke alarm signal, leakage current alarm signal, and water immersion alarm signal, in some specific implementation methods, the alarm mode can be divided according to the number of signals, so that corresponding alarm modes can be used for different numbers of signals to alarm, so that relevant personnel can accurately know the current situation of the electrical device.

[0104] In some implementations, when the terminal box receives any one of the danger signals, it enters a general danger mode and issues an alarm in a corresponding alarm manner; when the terminal box receives two or more of the danger signals, it enters an emergency danger mode and issues an alarm in a corresponding alarm manner.

[0105] In some specific implementations, the alarm mode of the terminal box is set to light alarm. Then, when the terminal box receives any of the danger signals, it enters the general danger mode, that is, the yellow light flashes, to remind relevant personnel that the electrical device may malfunction or even a fire; when the terminal box receives two or more of the danger signals, it enters the emergency danger mode, that is, the red light flashes, to remind relevant personnel that a fire has occurred in the electrical device and needs to be dealt with as soon as possible.

[0106] In some embodiments, the fire extinguishing monitoring system further includes a mobile terminal; when the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to send the location information and status information of the electrical device to the mobile terminal for display.

[0107] like Figure 3As shown, a monitoring fire extinguishing system includes a fire extinguishing agent module (fire extinguishing unit) 100, a multi-source sensor (state detection unit) 200, a monitoring alarm terminal (terminal box) 300, an alarm control host (fire monitoring host 400, fire management software 500, monitoring large screen 600), and a mobile terminal 700.

[0108] The fire extinguishing agent module 100 is connected to the monitoring and alarm terminal 300 and can automatically extinguish a fire when it occurs, transmitting a fire extinguishing activation signal to the monitoring and alarm terminal 300. The multi-source sensor 200 is also connected to the monitoring and alarm terminal 300, transmitting leakage current, temperature, smoke, and water intrusion signals to the terminal. The terminal 300 converts and collects the multiple input signals. If any signal reaches the set alarm threshold, an audible and visual alarm is immediately triggered. The monitoring and alarm terminal is connected to the fire monitoring host 400 via a wireless network, transmitting data and alarm signals to the host in real time. The host 400 is also connected to the fire management software 500 via the network, which transmits data and alarm signals from all subordinate monitoring and alarm terminals to the fire management software 500. The fire management software 500 is also connected to the monitoring screen 600 and mobile terminal 700 via the network, allowing fire information to be displayed in a three-dimensional format with both graphics and text.

[0109] like Figure 4 As shown, the fire extinguishing unit 100 includes a temperature-sensing trigger wire 101, a fire extinguishing agent 102, and a temperature-sensing switch 103. When the ambient temperature reaches the activation temperature of the temperature-sensing trigger wire 101, the temperature-sensing trigger wire 101 ignites, which in turn ignites the fire extinguishing agent 102, releasing a large amount of fire-extinguishing aerosol to extinguish the fire. The high temperature of the ignited fire extinguishing agent 102 causes the temperature-sensing switch 103 to close, outputting a signal indicating the activation of the fire extinguishing agent.

[0110] Status detection unit 200 includes a multi-core leakage current transformer (leakage current detection module) 201, a temperature sensor (temperature detection module) 202, a smoke sensor (smoke detection module) 203, and a water sensor (water detection module) 204. Leakage current sensor 201 measures leakage current in a circuit. It uses a core made of high-permeability material and features a shielding structure composed of three internal magnetic rings. This shields interference caused by the 1000-ampere operating current in the circuit and accurately measures milliampere leakage current. The leakage current sensor has a transformation ratio of 1000mA:2mA. Temperature sensor 202 uses a PT100 platinum resistance thermometer (RTR) with a positive temperature system. Smoke sensor 203 uses a photoelectric smoke maze sensor in conjunction with a dedicated MC145012 detection circuit. Water sensor 204 has two metal electrodes and detects water intrusion by measuring the resistance between them.

[0111] The terminal box 300 includes a signal acquisition and conversion circuit 301, a processor 302, an audible and visual alarm 303, a wireless communication circuit 304, and an antenna 305. The conversion and acquisition circuit 301 includes a function for converting one leakage current signal into a voltage signal and acquiring it, another for converting one thermistor signal into a voltage signal and acquiring it, and three switch quantity acquisition functions. The processor 302 processes the acquired data. When the leakage current value or temperature value exceeds a set threshold, the audible and visual alarm 303 is triggered to sound an alarm. Under normal conditions, all three switch quantities are detected as 0. When any one of them is detected as 1, the audible and visual alarm 303 is triggered to sound an alarm. The wireless communication circuit 304 sends and receives 2.4GHz electromagnetic wave signals via the antenna 305, forming a ZigBee network with other remote monitoring and alarm terminals and hosts. The leakage current alarm threshold and temperature alarm threshold of the monitoring and alarm terminal can be set using a dedicated tool.

[0112] like Figure 5 As shown, the fire monitoring host 400 includes an antenna 401, a wireless communication circuit 402, a processor 403, a display 404, and an Ethernet communication circuit 405. The wireless communication circuit 402 transmits and receives 2.4 GHz electromagnetic wave signals via the antenna 401, forming a ZigBee network with multiple remote monitoring and alarm terminals. The processor 403 receives leakage current values, temperature values, and alarm signals from the monitoring and alarm terminals via the ZigBee wireless network, and then displays these values, alarm signals, and the installation location of the corresponding monitoring and alarm terminals on the display 404. The processor 403 forwards this received data to the fire management software 500 via the Ethernet communication circuit 405. The on-site monitoring host regularly inspects the monitoring terminals under its jurisdiction, identifying system failures such as poor wireless communication link quality and providing prompts.

[0113] like Figure 6 As shown, the fire management software 500 includes four layers: data access, data storage, business processing, and display interaction. Business processing includes monitoring point management, instrument management, log management, fault handling, role and authority management, etc. The display interaction interface includes PC front-end and mobile terminal.

[0114] The backend management system can be set up within a local area network (LAN) or deployed on the internet. When deployed on the internet, it can be accessed by any connected computer or mobile phone. The backend management system comes with a companion app, which allows operations and maintenance personnel to view and handle fault alarms via the mobile app.

[0115] The background management system has historical data records of monitoring points, which can reflect the occurrence and development process of faults.

[0116] The background management system has the function of global situation display, which can timely and clearly reflect all fire points in the monitoring area and display them in the form of graphic indications and data statistics.

[0117] The background management system can display in detail all monitoring parameters of any normal or abnormal monitoring point.

[0118] The backend management system records operation and maintenance operations in detail and provides operation interfaces for query, statistics, printing and export.

[0119] The fire monitoring alarm terminal receives real-time signals from the fire signal sensor, senses the fire status of the monitored object or space, and sends the data to the fire monitoring host through the wireless sensor network. The fire monitoring host then forwards the data to the fire management software for comprehensive processing, and the information is presented on the monitoring screen and mobile terminal.

[0120] When the system detects a fire hazard or fire accident, it can quickly find the alarm information on the monitoring alarm terminal, fire monitoring host, monitoring screen and mobile terminal.

[0121] The signal acquisition board and signal processor module, including the switch signals of the integrated unit, are all connected to the monitoring alarm terminal;

[0122] The monitoring alarm terminal collects information from the leakage current sensor and other sensors such as smoke temperature, water immersion, and status. If one or more sensor information indicates an abnormality, an audible and visual alarm is activated, and a specific alarm signal and sensor value are sent to the fire monitoring host.

[0123] The monitoring alarm terminal detects the leakage current in the circuit through the leakage current sensor. When the leakage current is higher than the preset value, it activates the sound and light alarm and sends the leakage current exceeding the limit alarm signal and the leakage current value to the fire monitoring host.

[0124] The monitoring alarm terminal detects whether the fire extinguishing agent is activated by sensing the switch signal of the fire extinguishing agent. When the fire extinguishing agent is activated, the sound and light alarm is activated and the fire extinguishing agent activation alarm signal is sent to the fire monitoring host.

[0125] The monitoring alarm terminal is placed in a visible position on the top of the monitored electrical cabinet. On-site staff can quickly find the specific electrical cabinet that issued the alarm through the sound and light alarm;

[0126] When the monitoring alarm terminal sends data to the fire monitoring host, it carries its own ID information. A data table is pre-established within the fire monitoring host, indicating the correspondence between the monitoring alarm terminal ID and the name and number of the electrical cabinet. Staff can quickly locate the specific electrical cabinet that issued the alarm by using the cabinet name and number displayed on the fire monitoring host.

[0127] The fire monitoring host forwards the alarm signal and sensor values from the monitoring alarm terminal to the fire management software. The fire management software displays the location of the electrical cabinet on the monitoring screen, allowing staff to quickly find the specific electrical cabinet that issued the alarm.

[0128] The fire monitoring host forwards the alarm signal and sensor value of the monitoring alarm terminal to the fire management software, which pushes the information to the mobile terminal. The staff can quickly find the specific electrical cabinet that issued the alarm through the name, number and location information of the electrical cabinet displayed on the mobile terminal.

[0129] When the monitoring alarm terminal sends data to the fire monitoring host, it also includes the RSSI (Received Signal Strength Indicator) measurement information of the wireless communication channel. The fire monitoring host will issue an alarm to terminals whose RSSI values fall below the set threshold and send the alarm information to the fire management software. Staff can view the wireless communication channel quality between the monitoring alarm terminal and the fire monitoring host through the fire monitoring host, large monitoring screen, or mobile terminal, and use this information to optimize the wireless communication network.

[0130] A data table is pre-established in the fire monitoring host, indicating the monitoring and alarm terminals under its management and the reporting timeout value. The fire monitoring host cyclically checks the reporting records of each monitoring and alarm terminal in the data table. For monitoring and alarm terminals that have not reported within the timeout period, the fire monitoring host determines that they are offline. The fire monitoring host issues an offline alarm signal and sends the offline alarm signal to the fire management software. The staff can see the electrical cabinet where the offline monitoring and alarm terminal is installed through the fire monitoring host, the monitoring screen, or the mobile terminal, and quickly find the offline monitoring and alarm terminal based on the name, number and location information of the electrical cabinet;

[0131] The fire management software stores all data sent by the monitoring alarm terminal in the database. In the operation interface of the fire management software, you can view the historical records of alarm signals and sensor values of any monitored electrical cabinet, which provides a basis for analyzing the cause of the accident and studying anti-accident measures.

[0132] Multi-source sensors include leakage current sensors, smoke sensors, temperature sensors, water immersion sensors, and switch signals for sensing the action of fire extinguishing agents, making fire monitoring of electrical cabinets more comprehensive, which is conducive to early detection of fire hazards, efficient elimination of fire hazards, and avoidance of accidents.

[0133] The fire extinguishing agent module can automatically start extinguishing the fire at the budding stage without the need for human intervention, thus avoiding errors caused by human factors. Extinguishing the fire at the budding stage is the easiest and least costly method, and can effectively prevent the accident from expanding.

[0134] There is a risk if the fire extinguishing agent is not replaced after its expiration date. Fire management software can provide timely reminders and effectively manage the fire extinguishing agent to avoid the risk of the fire extinguishing agent exceeding its expiration date due to human factors.

[0135] Monitoring alarm terminals, fire monitoring hosts, monitoring screens and mobile terminals can all intuitively indicate the location of alarm electrical cabinets in buildings, guiding staff to arrive quickly, which helps avoid further losses from accidents.

[0136] Intelligent and information-based management methods for monitoring, preventing and extinguishing electrical fires allow workers to have a clear understanding of the physical parameters of each electrical cabinet without having to visit the site or open the cabinet. This can significantly reduce the workload of operation and maintenance inspections, thereby reducing the number of operation and maintenance personnel. The monitoring, prevention and extinguishing management of electrical cabinet fires is more effective, which is conducive to reducing costs and increasing efficiency in factories.

[0137] Maintenance personnel can view and process fault alarms via mobile devices, avoiding issues like inadequate communication and missed information from telephone calls and paper-based records. Fire management software can easily record and retrieve these maintenance logs, providing a basis for determining responsibility and ensuring accountability for accidents.

[0138] The fire management software records the history of all monitoring parameters of the electrical cabinet, which can reflect the occurrence and development process of the fault and provide a basis for regular summary and improvement of anti-accident measures.

[0139] Another embodiment of the present application is that the fire extinguishing agent module 100 and the multi-source sensor 200 can be combined together to form an integrated sensor and fire extinguishing unit design.

[0140] Another embodiment of the present application is to combine the fire extinguishing agent module 100, the multi-source sensor 200 and the monitoring alarm terminal 300 to form an integrated sensing, fire extinguishing and alarm device.

[0141] The present application provides a new leakage current sensor with strong resistance to large current interference and high sensitivity. When the insulation of the system is weakened, it can detect the leakage current of milliampere level in time and give early warning; at the same time, it integrates a set of smoke and temperature sensors to sense the fire status; when a fire occurs, it can quickly send a fire alarm to the monitoring center; in addition, it is equipped with a fire extinguishing medium with rapid release fire extinguishing performance. In the small space where the fire occurs, the fire extinguishing medium is quickly released to form a local hypoxic asphyxiation space, achieving efficient fire extinguishing. It is then equipped with a management method for monitoring, preventing and extinguishing electrical fires. Fire monitoring of electrical devices is realized, which can effectively prevent the occurrence of fires; when a fire occurs, it can be extinguished autonomously in time; the on-site alarm allows staff to promptly perceive the occurrence of fire or hidden dangers, as well as the specific location of the occurrence; through the prompts on the monitoring large screen and mobile terminal, the specific location of the fire or hidden danger can be quickly located, and the severity of the accident can be understood.

[0142] To achieve the above objectives, this application adopts the following technical solutions:

[0143] (1) Design a new leakage current sensor with high-efficiency isolation function, which can avoid the interference of large current and measure leakage current sensitively and accurately;

[0144] (2) It integrates temperature sensors, smoke sensors, leakage current sensors, fire extinguishing agent status sensors, water immersion status monitoring functions, and corresponding position display functions; this function effectively solves the problem of separate fire alarm solutions;

[0145] (3) Combine the fire monitoring function with the fire extinguishing agent; combine the fire extinguishing agent with the fire monitoring sensor and install it inside the electrical cabinet; use a fire extinguishing agent with special functions, which has high fire extinguishing efficiency and small size, and is suitable for placement inside the electrical cabinet.

[0146] The main innovations of this application are:

[0147] 1. The use of multi-magnetic ring leakage current transformer can effectively prevent large current interference, collect possible small leakage current, provide early fire warning, and avoid alarm delays or false alarms and missed alarms.

[0148] 2. Integrating smoke sensors, temperature sensors, leakage current transformers, water immersion sensors, fire extinguishing agents and their status sensing sensors can not only monitor the fire situation in the electrical cabinet, but also effectively and autonomously extinguish the fire after it occurs.

[0149] 3. When the monitoring parameters in the electrical cabinet are abnormal, the terminal box can send out sound and light alarm signals to mark the faulty electrical cabinet.

[0150] 4. The terminal box has a wireless signal transmission function, which can collect the operating status of each electrical cabinet on site to the on-site monitoring host. The on-site monitoring host has a display screen that can display the operating information of each electrical cabinet.

[0151] 5. The on-site monitoring host can indicate the terminal name and specific location of the alarm, so as to facilitate rapid positioning and on-site processing.

[0152] 6. The on-site monitoring host can inspect the monitoring terminals under its jurisdiction, identify system failures such as poor quality of wireless communication links, and provide prompts.

[0153] 7. The on-site monitoring host receives power through the communication cable. When the power supply of the on-site monitoring host fails or the cable is cut, the personal safety and the safety of upstream equipment can be guaranteed.

[0154] 8. The on-site monitoring host connects to the local area network or the Internet via the TCP / IP protocol through the network port. Its IP address can be obtained automatically or specified. The on-site monitoring host uploads data to the cloud. By logging into the cloud via a computer or mobile phone, you can remotely view the operation status of the electrical cabinet.

[0155] 9. The on-site monitoring host can send a specific trip signal to the protection system;

[0156] 10. The backend management system can be set up in a local area network or deployed on the Internet. When the backend management system is deployed on the Internet, it can be accessed by any computer and mobile phone connected to the Internet. The backend management system has a supporting APP.

[0157] 11. The background management system has historical data records of monitoring points, which can reflect the occurrence and development process of faults.

[0158] 12. The background management system has the function of displaying the overall situation, which can promptly and clearly reflect all the fire points in the monitoring area and display them in the form of graphic indications and data statistics.

[0159] 13. The background management system can display all monitoring parameters of any normal or abnormal monitoring point in detail.

[0160] 14. Operation and maintenance personnel view and handle fault alarms through mobile phone APP.

[0161] 15. The backend management system records operation and maintenance operations in detail and provides query, statistics, printing and export operation interfaces.

[0162] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A monitoring fire extinguishing system, characterized in that: Used to monitor the real-time status of electrical devices and automatically extinguish fires and give alarms when a fire occurs in the electrical devices. The system includes: a fire monitoring and extinguishing device, and a terminal box; The fire monitoring and extinguishing device is arranged inside the electrical device and includes a status detection unit and a fire extinguishing unit; The fire extinguishing unit includes a fire extinguishing agent and a temperature switch, and is used to automatically ignite the fire extinguishing agent when the temperature in the electrical device reaches the ignition point of the fire extinguishing agent, so that the fire extinguishing agent burns to generate a fire extinguishing medium, thereby extinguishing the fire, and close the temperature switch to send a closing signal to the terminal box; The state detection unit is used to detect the state of the electrical device and send the detected state signal to the terminal box; The state detection unit includes a leakage current detection module for detecting milliampere leakage current; the leakage current detection module includes a signal processing unit and three magnetic rings; the three magnetic rings have the same center and different radii; the three magnetic rings are filled with insulating material; each of the magnetic rings is evenly wound with a plurality of turns of coils, and the terminals of the coils are connected to the signal processing unit; the signal processing unit is used to receive leakage current signals collected by the coils on the three magnetic rings, and perform arithmetic average calculation to obtain an average value multiplied by the number of winding turns on each magnetic ring to determine the actual leakage current value, and send a leakage current alarm signal to the terminal box when the actual leakage current value is higher than a preset leakage current threshold; the state signal includes the leakage current alarm signal; The terminal box is connected to the temperature switch and the status detection unit respectively, and is used to analyze the status of the electrical device when receiving the closing signal and / or the status signal, and to issue an alarm when it is determined that the status of the electrical device is abnormal.

2. The monitoring fire extinguishing system according to claim 1, characterized in that: The state detection unit also includes: a temperature detection module, a smoke detection module, and a water immersion detection module; The temperature detection module is used to detect the temperature of the electrical device, and when the temperature of the electrical device is higher than a preset temperature threshold, send a temperature alarm signal to the terminal box; The smoke detection module is used to detect the smoke concentration in the electrical device and send a smoke alarm signal to the terminal box when the smoke concentration in the electrical device is higher than a preset smoke concentration threshold; The water immersion detection module is used to detect whether the electrical device is flooded, and when the electrical device is flooded, sends a water immersion alarm signal to the terminal box; The status signal includes the temperature alarm signal, the smoke alarm signal, and the water immersion alarm signal.

3. The monitoring fire extinguishing system according to claim 1 or 2, characterized in that: Also includes: Alarm control host; The alarm control host is connected to the terminal box; The terminal box is further used to send a danger signal to the alarm control host; the danger signal includes the closing signal and / or the status signal; The alarm control host is used to receive the danger signal sent by the terminal box, issue an alarm, and upload the alarm information to the cloud host computer management system, which processes the alarm information.

4. The monitoring fire extinguishing system according to claim 3, characterized in that: The distance between the terminal box and the electrical device is less than a preset distance; the terminal box further comprises a positioning module for generating positioning information of the terminal box; When the terminal box sends a danger signal to the alarm control host, the terminal box is specifically configured to combine the positioning information with the danger signal to generate a first danger signal, and send the first danger signal to the alarm control host; When the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to perform data analysis on the first danger signal to obtain the positioning information and the danger signal, and combine the distance between the terminal box and the electrical device to determine the location information and status information of the electrical device and issue an alarm.

5. The monitoring fire extinguishing system according to claim 3, characterized in that: The distance between the terminal box and the electrical device is less than a preset distance; the terminal box further comprises a numbering module for generating numbering information of the terminal box; When the terminal box sends a danger signal to the alarm control host, the terminal box is specifically configured to combine the number information with the danger signal to generate a second danger signal, and send the second danger signal to the alarm control host; When the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to perform data analysis on the second danger signal to obtain the number information and the danger signal, and match the number information with a preset number table to determine the location information of the terminal box; determine the location information and status information of the electrical device according to the distance between the terminal box and the electrical device, and issue an alarm; The number table includes the numbers of the terminal boxes and the position information corresponding to the terminal boxes.

6. The monitoring fire extinguishing system according to claim 4 or 5, characterized in that: The alarm control host includes a display; When the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to display the location information and status information of the electrical device on the display.

7. The monitoring fire extinguishing system according to claim 1 or 2, characterized in that: When the terminal box determines that the state of the electrical device is abnormal and issues an alarm, it is specifically used to: When it is determined that the state of the electrical device is abnormal, an alarm is issued using a corresponding alarm mode according to the type of the abnormal state.

8. The monitoring fire extinguishing system according to claim 1 or 2, characterized in that: When the terminal box determines that the state of the electrical device is abnormal and issues an alarm, it is specifically used to: When it is determined that the state of the electrical device is abnormal, an alarm is issued using a corresponding alarm mode according to the number of abnormal signals received.

9. The monitoring fire extinguishing system according to claim 4 or 5, characterized in that: Also includes mobile terminals; When the alarm control host receives the danger signal sent by the terminal box and issues an alarm, it is specifically used to send the location information and status information of the electrical device to the mobile terminal for display.

10. A leakage current sensor, characterized in that: Used to detect milliampere leakage current; the leakage current sensor includes: a signal processing unit and three magnetic rings; the three magnetic rings have the same center and different radii; the three magnetic rings are filled with insulating material; each of the magnetic rings is evenly wound with a number of turns of coils, and the terminals of the coils are connected to the signal processing unit; the signal processing unit is used to receive the leakage current signals collected by the coils on the three magnetic rings, and perform arithmetic average calculation to obtain the average value multiplied by the number of winding turns on each magnetic ring to determine the actual leakage current value.

Images