Small fire detection and fire extinguishing system developed based on single-chip microcomputer

Abstract

The invention discloses a small fire detection and fire extinguishing system developed based on a single-chip microcomputer, and relates to the technical field of fire extinguishing systems, the small fire detection and fire extinguishing system comprises a control device, a detection device and a gas fire extinguishing device, the control device is a fire control module, the detection device comprises a plurality of flame detectors, and the gas fire extinguishing device comprises a gas assembly and a pipeline accessory. The fire-fighting control module receives power supplied by an external power supply, provides a power supply for the detection device and the gas fire extinguishing device, and monitors an electromagnetic starter circuit and fire extinguishing starting of the gas fire extinguishing device, and the detection device transmits a fire alarm signal of a protection area and a fault signal of a detector to the fire-fighting control module through a passive contact; the gas fire extinguishing device is used for gas storage and fire extinguishing. The fire extinguishing system achieves automatic fire extinguishing and state monitoring through multiple safety mechanisms, intelligent control logic and reliable fire extinguishing execution capacity, and the automation level of fire prevention and control in a small protection area is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fire extinguishing system, in particular to a small fire detection and extinguishing system based on single-chip microcomputer development. BACKGROUND

[0002] The application of the small fire detection and extinguishing system is to cope with the special and serious environment of ship space sealing, equipment concentration, fire risk, and to protect personnel safety and task continuity. Early control of ship fire is the key to avoid disaster expansion, and the small fire detection and extinguishing system is the key technology to achieve this goal.

[0003] Some existing small fire extinguishing devices usually use manual start or single detector trigger mode, which has high false alarm rate, poor system stability, lack of multiple detection and redundancy protection mechanism, etc. Especially in the case of communication interruption or control system failure, it may not be able to start the fire extinguishing process in time, leading to fire expansion. At the same time, some fire extinguishing systems do not have secondary fire extinguishing capability, and lack effective remedial measures once the first fire extinguishing is unsuccessful, which is difficult to adapt to the response needs of complex fire conditions.

[0004] Therefore, in view of the above problems, it is necessary to develop a small fire detection and extinguishing system with high integration, strong automation and multiple detection and extinguishing functions to realize early and accurate detection, automatic judgment, timely alarm and rapid fire extinguishing, and to ensure the safety of the protected area under various complex working conditions, avoiding or reducing the loss caused by fire. SUMMARY

[0005] The purpose of the present application is to provide a small fire detection and extinguishing system based on single-chip microcomputer development to solve the problems in the background art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a small fire detection and extinguishing system based on single-chip microcomputer development, comprising a control device, a detection device and a gas fire extinguishing device, the control device is a fire control module, the detection device comprises a plurality of flame detectors, the gas fire extinguishing device comprises a gas assembly and a pipeline accessory, the fire control module receives external power supply, provides power supply for the detection device and the gas fire extinguishing device, and monitors the electromagnetic starter circuit and the fire extinguishing start of the gas fire extinguishing device, the detection device transmits the fire alarm signal of the protected area and the detector itself fault signal to the fire control module through passive contact, and the gas fire extinguishing device is used for gas storage and fire extinguishing.

[0007] Preferably, the operation of the fire extinguishing system comprises the following steps: When the fire occurs in the area protected by the fire extinguishing system, the flame detector sends a fire alarm signal to the fire control module, and the fire control module judges the fire alarm and transmits the monitored fire alarm information to the upper computer, and the upper computer starts the electromagnetic starter of the gas fire extinguishing device to release the gas for fire extinguishing.

[0008] Preferably, the gas fire extinguishing device comprises a plurality of gas cylinder groups, and has a secondary fire extinguishing function.

[0009] Preferably, when the number of alarm of the flame detector is more than one, the fire control module automatically starts the electromagnetic starter of the gas fire extinguishing device to release the gas for fire extinguishing, and transmits the working state to the upper computer through the network port or the CAN communication interface, so that the fire control module can still automatically extinguish the fire in the case of communication interruption.

[0010] Preferably, the fire control module judges the fire alarm and transmits the monitored information to the upper computer through the network port, the CAN communication interface or the passive contact.

[0011] Preferably, the fire control module comprises a power conversion circuit, a network port driving circuit, a CAN driving circuit, an RS485 driving circuit, a power output circuit, a switching value input circuit, a relay output circuit and an analog input circuit, and the fire control module collects the signals transmitted by the flame detector, monitors the electric starting loop signal, controls the fire extinguishing and uploads the state information.

[0012] Preferably, the power conversion circuit is used for receiving an external DC 24V power supply, the network port driving circuit is used for Ethernet communication, the CAN driving circuit is used for CAN communication, the RS485 driving circuit is used for RS485 communication, the power output circuit is used for DC 24V power output, the switching value input circuit is used for collecting switching value signals, the relay output circuit is used for passive contact output, and the analog input circuit is used for analog signal collection.

[0013] Preferably, the flame detector receives the DC 24V power supply provided by the fire control module, and sends the fire alarm signals of the monitored protection area and the fault signals of the flame detector itself to the fire control module through the passive contact.

[0014] Preferably, the gas fire extinguishing device comprises a gas cylinder assembly and pipeline accessories, the pressure sensor and the electromagnetic starter are located on the gas cylinder assembly, the fire control module provides a DC 24V power supply for the pressure sensor, the pressure sensor is used for monitoring the gas pressure and feeding back the pressure information to the fire control module, and the fire control module provides a DC 24V power supply for the electromagnetic starter, and the electromagnetic starter is used for starting the gas cylinder.

[0015] In the above technical solution, the present application has the following technical effects and advantages: The application can monitor the fire in the protection area in real time through multiple flame detectors, can discover the fire in time and send a fire alarm signal, and can improve the sensitivity and reliability of fire detection. The detection device transmits the fire alarm signal and its own fault signal to the fire control module through a passive contact, realizes stable and reliable communication of the detection state, and enhances the safety and fault self-checking capability of the system.

[0016] The fire control module of the application is the core control unit of the system, integrates power conversion, multiple communication interfaces (such as network interface, CAN, RS485), switching value input and output, analog quantity acquisition and other functional circuits, can not only provide stable DC 24V power supply for the detection device and the gas fire extinguishing device, but also can collect, process and control various signals, realize the core functions of fire alarm judgment, state monitoring and fire extinguishing control, and improve the intelligent and automatic level of the system.

[0017] The gas fire extinguishing device of the application adopts multiple groups of gas cylinders, has primary and secondary fire extinguishing functions, and preferentially executes the primary fire extinguishing process. When the primary fire extinguishing fails or the fire extinguishing effect needs to be enhanced, the secondary fire extinguishing can be quickly started to enhance the reliability and effectiveness of fire extinguishing. At the same time, the system supports automatic triggering of the fire extinguishing process under the condition that multiple flame detectors alarm at the same time, does not need to rely on the instruction of the upper computer, ensures that the automatic fire extinguishing can still be implemented quickly in the extreme condition of communication interruption, greatly improves the emergency response capability and safety guarantee level of the system.

[0018] The application uploads the fire alarm information, fire extinguishing state and equipment running parameters to the upper computer in real time through the network interface, CAN or RS485 and other communication interfaces, is convenient for remote monitoring and management, can still ensure the normal execution of the local automatic fire extinguishing function when the communication is abnormal, and takes into account the remote controllability and local reliability. The pressure sensor monitors the gas pressure in the gas cylinder in real time and feeds back to the control module, which helps to grasp the state of the fire extinguishing agent in time and ensures the availability of the fire extinguishing device.

[0019] The application realizes the integrated functions of early and accurate fire detection, quick judgment, automatic fire extinguishing and state monitoring through modular design, multiple safety mechanisms, intelligent control logic and reliable fire extinguishing execution capability, effectively improves the automatic level, response speed and reliability of fire prevention and control in small protection areas, and has wide application prospect and practical value. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0021] Figure 1 Frame diagram of fire extinguishing system of the present application. DETAILED DESCRIPTION

[0022] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] Embodiment: The embodiment provides a small fire detection and extinguishing system developed based on a single-chip microcomputer. Referring to FIG. 1, the system comprises a control device, a detection device and a gas extinguishing device. The control device is a fire control module, the detection device is composed of multiple flame detectors, and the gas extinguishing device is composed of a gas assembly and pipeline accessories.The fire control module receives external DC 24V power supply, provides DC 24V power supply for the detection device and the gas extinguishing device, and can monitor the electromagnetic starter circuit and the extinguishing start. The detection device transmits the fire alarm signal of the protected area and the fault signal of the detector itself to the fire control module through passive contacts. The gas extinguishing device is used for gas storage and fire extinguishing. Figure 1

[0024] Among them: The multiple flame detectors serve as the detection device and are responsible for fire monitoring of the protected area. When a fire alarm is detected, the fire alarm signal and the fault signal of the detector itself are transmitted to the fire control module through passive contacts. The fire control module serves as the control core of the whole system, receives external DC 24V power supply and provides DC 24V working power supply for the detection device and the gas extinguishing device, receives the fire alarm and fault signals from the detection device, judges and processes the signals, and monitors the working circuit of the electromagnetic starter and the extinguishing start state of the gas extinguishing device. The gas extinguishing device comprises a gas assembly and pipeline accessories, which are driven by the electromagnetic starter and the pressure sensor and the like through the DC 24V power supply provided by the fire control module. After the fire control module judges that the fire alarm is established, the electromagnetic starter is controlled by the fire control module to start and release the stored gas for fire extinguishing. The modules are connected through power lines, passive contact signals and control signals to realize the transmission of data and control instructions, and jointly complete the functions of fire detection, alarm and automatic fire extinguishing.

[0025] The fire control module is composed of power conversion circuit, network port driving circuit, CAN driving circuit, RS485 driving circuit, power output circuit, switching value input circuit, relay output circuit, analog input circuit and the like. The power conversion circuit is used for receiving external DC 24V power supply; the network port driving circuit is used for Ethernet communication; the CAN driving circuit is used for CAN communication; the RS485 driving circuit is used for RS485 communication; the power output circuit is used for DC 24V power output; the switching value input circuit is used for collecting switching value signals; the relay output circuit is used for passive contact output; and the analog input circuit is used for analog signal collection. The fire control module mainly collects signals transmitted by a flame detector, monitors electric starting loop signals (breakage fault, fire extinguishing starting), performs fire extinguishing control, uploads state information and the like.

[0026] Further, the power conversion circuit in the fire control module is the power supply basis of the whole module. Firstly, it receives external input DC 24V power supply and converts it into stable voltage (such as 5V, 3.3V and the like) required by each circuit inside the module, so as to provide working power for the network port driving circuit, CAN driving circuit, RS485 driving circuit, switching value input circuit, relay output circuit, analog input circuit and the like, and ensure that these circuits can normally operate. Among them: The power output circuit is also powered by the power conversion circuit. Its function is to output the converted DC 24V power supply directly or after voltage stabilization, so as to supply power to external devices (such as flame detectors, electromagnetic starters, pressure sensors and the like), and ensure the normal work of peripheral devices; The switching value input circuit is used for collecting switching value signals (such as passive contact fire alarm signals and fault signals of the flame detector) from the outside. Its input end is connected to external passive contact signals, and the working power is provided by the power conversion circuit. The collected signals are transmitted to the internal main control unit (such as a single-chip microcomputer) for processing; The analog input circuit is used for collecting analog signals (such as analog voltage or current signals of the pressure sensor, reflecting the gas pressure state). It is also powered by the power conversion circuit. The collected analog signals are transmitted to the main control unit for analog-digital conversion and analysis; The relay output circuit is used for outputting passive contact control signals (such as controlling external sound and light alarms, linkage devices or as fire extinguishing starting signal output and the like). Its working power is provided by the power conversion circuit, and the control instruction comes from the main control unit. Passive output is formed outside through the relay contact; The net port driving circuit, the CAN driving circuit and the RS485 driving circuit are respectively used for realizing the communication functions of Ethernet, CAN bus and RS485 bus, and are powered by the power conversion circuit, connected with the main control unit, and responsible for uploading the state information (such as fire alarm state, system running state, fire extinguishing action, etc.) of the fire control module to the upper computer or other monitoring equipment through the corresponding communication interface, and also can receive the control instructions from the upper computer (depending on the system configuration). All the above-mentioned circuits (including the power conversion circuit itself) are connected with each other by power lines, ground lines and signal lines in hardware to form a complete electrical system, wherein the main control unit (such as a single-chip microcomputer) serves as the control core of the fire control module, coordinates the work of various circuits, receives the input signals of the on-off input circuit and the analog input circuit, controls the output of the relay output circuit, realizes communication through the net port driving circuit, the CAN driving circuit and the RS485 driving circuit, and manages the power output circuit to supply power to external devices.

[0027] Specifically, the overall working process of the fire control module is as follows: After the fire control module is powered on, the power conversion circuit receives the externally input DC 24V power supply and converts it into the working voltage required by each functional circuit inside the module (such as 5V, 3.3V, etc.), providing stable power supply for the net port driving circuit, the CAN driving circuit, the RS485 driving circuit, the power output circuit, the on-off input circuit, the relay output circuit and the analog input circuit, ensuring the normal start and operation of the entire module.

[0028] After the system is started, the on-off input circuit starts to work and collects passive contact signals from external flame detectors in real time, including fire alarm signals and detector fault signals. These on-off signals are sent to the main control unit of the fire control module for processing. At the same time, the analog input circuit also starts to work and collects analog signals (such as gas pressure value) from devices such as pressure sensors in the gas fire extinguishing device, and transmits the analog signals to the main control unit for analysis and judgment after converting them into digital signals.

[0029] The main control unit judges whether multiple flame detectors alarm at the same time (i.e. more than one fire alarm signal) or a single detector continuously alarms according to the signals collected by the on-off input circuit, and combines the gas pressure and other state information collected by the analog input circuit to comprehensively evaluate whether there is a fire risk in the current protection area. If it is judged as a fire alarm state, the main control unit will output a passive contact control signal through the relay output circuit to trigger external linkage devices (such as a bell, a sound and light alarm, etc.), and at the same time prepare to start the gas fire extinguishing process.

[0030] After confirming the fire alarm, the main control unit outputs control signals to the electromagnetic starter control circuit in the gas fire extinguishing device through the relay output circuit (active signal) on one hand, starts the electromagnetic starter, and thus opens the gas cylinder to release fire extinguishing gas; on the other hand, the main control unit also continuously provides stable DC 24V working power for the flame detector, electromagnetic starter, pressure sensor and other key devices through the power output circuit, ensuring the normal operation of each device during the fire extinguishing process.

[0031] During the entire working process, the main control unit also uploads the working state of the system (including fire alarm information, detector state, fire extinguishing start state, gas pressure information, system fault information, etc.) to the upper computer or remote monitoring platform in real time through the network port drive circuit, CAN drive circuit and RS485 drive circuit, realizing remote monitoring and recording; if the communication line is interrupted, since the on-off input circuit and the relay output circuit are directly controlled locally, the fire control module can still independently complete the fire alarm judgment and fire extinguishing start according to the locally collected signals, ensuring the reliability and safety of the system in the case of communication abnormality.

[0032] The main control unit also continuously monitors the state of the electromagnetic starter circuit, including whether there is a broken wire fault and other abnormal conditions, and collects and uploads the fault information through the corresponding circuit, ensuring that the fire extinguishing system is always controllable and maintainable.

[0033] The fire control module realizes power supply guarantee through the power conversion circuit, realizes the collection of fire alarm state signals through the on-off input circuit and the analog input circuit, realizes control and power output through the relay output circuit and the power output circuit, realizes data communication and remote monitoring through the network port drive circuit, CAN drive circuit and RS485 drive circuit, and each circuit works cooperatively under the unified scheduling of the main control unit, forming a complete fire control system integrating fire detection, signal collection, state judgment, fire extinguishing control, information uploading and device power supply, ensuring that the system can efficiently, reliably and safely operate in small fire protection scenarios.

[0034] The detection device is composed of multiple flame detectors, which receive the DC 24V power supply provided by the fire control module and send the fire alarm signals of the monitored protection area and the fault signals of the flame detectors to the fire control module through passive contacts.

[0035] The detection device is composed of multiple flame detectors, which receive the DC 24V power supply provided by the fire control module and send the fire alarm signals of the monitored protection area and the fault signals of the flame detectors to the fire control module through passive contacts.

[0036] In operation, the operating power of all the flame detectors is provided by the power output circuit in the fire control module. Specifically, the fire control module converts the externally input DC 24V power into a stable voltage suitable for the detectors through an internal power conversion circuit, and delivers the DC 24V power to each flame detector through a dedicated power output circuit, thereby ensuring long-term stable operation of the flame detector.

[0037] In a normal power-on operating state, each flame detector continuously scans and analyzes the environment in its monitoring area, mainly detecting whether there are flame-specific spectral characteristics (such as ultraviolet light, infrared light, etc.) or high temperature, fire light, and other fire-related phenomena. When a fire occurs in a certain protection area and produces flame, the corresponding flame detector can quickly sense this fire characteristic signal and make judgments and processing in its internal circuit. Once the fire alarm condition is confirmed (i.e., the flame is detected or the predetermined alarm threshold is reached), the detector will immediately trigger the internal alarm mechanism.

[0038] At this time, the flame detector does not directly transmit the fire alarm information through an active signal (such as a current or voltage signal), but sends the fire alarm signal to the fire control module through a passive contact. Specifically, each flame detector is internally provided with a dedicated fire alarm output passive contact (normally open or normally closed contact), which remains in the default state (such as the normally open contact being open) when no fire alarm occurs. When the detector detects a fire, its internal circuit will control the passive contact to close (or open, depending on the design), forming a switching signal that is connected by hardwiring to the switching input circuit in the fire control module, thereby transmitting the fire alarm information to the fire control module in the form of switching quantity.

[0039] At the same time, each flame detector also has a self-diagnosis function, which can monitor its operating state in real time, such as whether the internal circuit is faulty, whether the optical element is contaminated or damaged, whether the power is abnormal, etc. When the detector detects a fault (such as unable to work normally, abnormal signal, element aging, etc.), it will also send a fault signal to the fire control module through another independent passive contact (fault output contact). Similar to the fire alarm signal, the fault signal is also represented by the state change of the passive contact (such as contact closure or opening), and is transmitted to the switching input circuit of the fire control module through the line, which is identified and processed by the fire control module.

[0040] After receiving the passive contact signals from various flame detectors, the fire control module collects and judges the levels of these signals through internal switch input circuit, identifies which detectors send out fire alarm signals and which detectors have faults. Then, the fire control module analyzes and processes these signals, judges whether the fire extinguishing start conditions are met (such as multiple detectors alarm at the same time or a single detector continuously alarms, etc.), and decides whether to start the subsequent fire extinguishing process according to the judgment result.

[0041] The working principle of the detection device is: The DC 24V power supply is provided by the fire control module to enable multiple flame detectors to work continuously; the detectors monitor the flame characteristics in the protected area in real time, output fire alarm switch signals through internal passive contacts when detecting a fire, and output fault signals through another passive contact when detecting a fault; these switch signals are transmitted to the switch input circuit of the fire control module through hardwiring, and are collected, judged and processed by the fire control module, so as to realize automatic detection of fire and timely reporting of abnormal state, and provide reliable basis for subsequent alarm and fire extinguishing control.

[0042] The gas fire extinguishing device includes a gas cylinder assembly and pipeline accessories, a pressure sensor and an electromagnetic starter are located on the gas cylinder assembly, the fire control module provides DC 24V power supply to the pressure sensor, and the pressure sensor is used to monitor the gas pressure and feed back the pressure information to the fire control module; the fire control module provides DC 24V power supply to the electromagnetic starter, and the electromagnetic starter is used to start the gas cylinder.

[0043] The gas fire extinguishing device is an executive mechanism in the entire fire detection and extinguishing system, and its main function is to quickly and reliably release fire extinguishing gas to extinguish or suppress the fire in the protected area after the fire is confirmed. The device is mainly composed of a gas cylinder assembly and pipeline accessories, and the gas cylinder assembly is internally filled with a certain amount of fire extinguishing gas (such as heptafluoropropane, carbon dioxide, IG541, etc.), which is in a high-pressure storage state at ordinary times, and only releases gas after receiving a start command; the pipeline accessories include gas pipes, nozzles, valves, etc., which are used to deliver and uniformly spray the fire extinguishing gas in the gas cylinder to the protected area to achieve effective fire extinguishing.

[0044] In the gas fire extinguishing device, the pressure sensor and the electromagnetic starter are two key control and monitoring components, which are installed on the gas cylinder assembly and closely cooperate with the fire control module to realize the control and monitoring of the state of the fire extinguishing gas.

[0045] The pressure sensor is installed on the gas cylinder assembly for real-time monitoring of the pressure state of the fire extinguishing gas inside the gas cylinder, which is an important basis for determining whether the gas cylinder is in normal working condition, whether the gas is sufficient, and whether there is leakage, etc. The pressure sensor converts the pressure of the gas inside the gas cylinder into a corresponding electrical signal (usually an analog voltage or current signal) through induction.

[0046] When working, the fire control module provides stable DC 24V power to the pressure sensor through its internal power output circuit, ensuring that the sensor can work continuously. After obtaining power, the pressure sensor collects the gas pressure information inside the gas cylinder in real time and transmits the analog signal to the analog input circuit in the fire control module through the signal line. After the analog input circuit processes and converts the signal to digital, it is sent to the main control unit for analysis and judgment.

[0047] The fire control module can determine whether the gas pressure in the current gas cylinder is within the normal range by analyzing the signal feedback from the pressure sensor: If the pressure value is within the set normal range, it means that the gas cylinder is in good condition and the gas is sufficient, and the fire extinguishing task can be executed at any time; If the pressure value is too low, it may indicate that the gas cylinder has gas leakage, gas has been partially released, or the gas cylinder is aging, etc. The fire control module can record this fault information and upload it to the upper computer to prompt maintenance or replacement of the gas cylinder; Before starting the fire extinguishing, the system can also confirm the release capacity of the gas cylinder through the pressure signal to improve the reliability of the fire extinguishing operation.

[0048] Working principle of electromagnetic starter: The electromagnetic starter is a key executive component for controlling the release of fire extinguishing gas from the gas cylinder. It is usually connected to the starting valve or bottle head valve of the gas cylinder, used to mechanically trigger the opening of the valve, thereby releasing the high-pressure fire extinguishing gas stored in the bottle.

[0049] In the normal standby state of the system, the electromagnetic starter is in a power-off state, its internal electromagnetic coil does not work, and the corresponding valve remains closed. The fire extinguishing gas inside the gas cylinder is sealed and stored, and will not be released. At this time, the entire gas fire extinguishing device is in a safe standby mode.

[0050] When the fire control module decides to start the fire extinguishing process through the internal fire alarm judgment logic (such as receiving fire alarm signals from multiple flame detectors and confirming that a fire has occurred), the fire control module will output a control signal through its internal relay output circuit to control the corresponding relay to close, thereby making the electromagnetic starter connect the DC 24V power provided by the power output circuit of the fire control module.

[0051] Once the electromagnetic starter obtains DC 24V power supply, the electromagnetic coil inside it generates electromagnetic force, drives the internal mechanical structure (such as iron core, top rod, etc.) to act, thereby pushing or opening the starting valve or bottle head valve on the gas cylinder, making the high-pressure fire extinguishing gas inside the gas cylinder release instantaneously, and through pipeline accessories (such as gas pipe, nozzle, etc.) quickly transported to the protection area, evenly sprayed around the fire source, to achieve the purpose of suppressing or extinguishing the flame.

[0052] The starting of the electromagnetic starter is usually a mechanical action that cannot be reversed. Once the power is triggered, the gas cylinder valve is opened, and the gas cannot be recovered after release. Therefore, the system will conduct strict fire alarm confirmation before starting to prevent misoperation.

[0053] The gas fire extinguishing device is closely connected with the fire control module through power supply and signal lines: The fire control module provides DC 24V power supply to the pressure sensor through the power output circuit, so that it can continuously monitor the gas pressure in the cylinder and feed back the pressure signal to the fire control module in the form of analog quantity for state monitoring and fault warning; The fire control module also provides DC 24V power supply to the electromagnetic starter through the power output circuit, but this power supply is in an off state at ordinary times. Only when the fire control module determines that the fire alarm is valid and decides to start fire extinguishing, it controls the electromagnetic starter to be powered on through the relay output circuit, realizes the mechanical opening of the cylinder valve and the release of gas; During the whole process, the fire control module realizes the state monitoring, safety judgment, fire extinguishing triggering and execution control of the gas fire extinguishing device by collecting pressure signals and controlling the electromagnetic starter, ensuring that the fire extinguishing gas is released only when it is really needed, which not only guarantees the effectiveness of fire extinguishing, but also improves the safety and reliability of the system.

[0054] The working principle of the gas fire extinguishing device is as follows: The fire control module provides DC 24V power supply to the pressure sensor, so that it can monitor the pressure state of the fire extinguishing gas in the cylinder in real time and feed back the pressure signal to the fire control module for state judgment. At the same time, after confirming the fire alarm, the fire control module provides DC 24V power supply to the electromagnetic starter, so that it acts and opens the cylinder valve to release high-pressure fire extinguishing gas, which is quickly sprayed to the protection area through the pipeline accessories, realizes rapid and effective fire extinguishing, and ensures the safety of the protection area.

[0055] Working principle: when the fire extinguishing system protected area fire, the flame detector will be fire alarm, and the fire alarm signal through the passive contact to the fire control module, fire control module to determine the presence of fire, can be through the network, CAN communication interface or passive contact will fire control module monitoring information transmission to the host computer, the host computer can be remote control fire extinguishing. When more than a plurality of flame detector alarm, fire control module automatic fire extinguishing process, will start the gas fire extinguishing device on the electromagnetic starter, release gas fire extinguishing, and the working state through the network or CAN communication interface to the host computer. In the case of communication interruption, also does not affect the automatic fire extinguishing process of fire control module, gas fire extinguishing device has multiple gas cylinder, with the secondary fire extinguishing function, in the first, secondary fire extinguishing function normal condition, preferentially start the first fire extinguishing process.

[0056] In the absence of conflict, those skilled in the art can combine and use the above additional technical features freely.

[0057] In the description of the present application, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments. Obviously, many modifications and variations can be made according to the content of the present application. The present application selects and describes these embodiments in order to better explain the principles and practical application of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A small fire detection and extinguishing system based on single-chip microcomputer development, characterized in that: The fire extinguishing system comprises a control device, a detection device and a gas fire extinguishing device. The control device is a fire control module. The detection device comprises a plurality of flame detectors. The gas fire extinguishing device comprises a gas assembly and a pipeline accessory. The fire control module receives external power supply, provides power supply for the detection device and the gas fire extinguishing device, and monitors the electromagnetic starter circuit and the fire extinguishing starting of the gas fire extinguishing device. The detection device transmits the fire alarm signals of the protected area and the fault signals of the detectors to the fire control module through passive contacts. The gas fire extinguishing device is used for gas storage and fire extinguishing.

2. The small fire detection and extinguishing system based on single-chip microcomputer development according to claim 1, characterized in that: The operation of the fire extinguishing system comprises the following steps: When a fire occurs in the area protected by the fire extinguishing system, the flame detector alarms and transmits the fire alarm signals to the fire control module. The fire control module judges the occurrence of the fire alarm, transmits the monitored fire alarm information to the upper computer, and the upper computer starts the electromagnetic starter of the gas fire extinguishing device to release gas for fire extinguishing.

3. The small fire detection and extinguishing system based on single-chip microcomputer development according to claim 2, characterized in that: The gas fire extinguishing device comprises a plurality of gas cylinders and has a secondary fire extinguishing function. When there is no abnormal condition in the primary and secondary fire extinguishing functions, the primary fire extinguishing process is preferentially started.

4. The small fire detection and extinguishing system based on single-chip microcomputer development according to claim 3, characterized in that: When the number of alarm of the flame detectors is more than one, the fire control module automatically starts the fire extinguishing process, starts the electromagnetic starter of the gas fire extinguishing device to release gas for fire extinguishing, and transmits the working state to the upper computer through the network port or the CAN communication interface, so that the fire control module can still automatically extinguish the fire in the case of communication interruption.

5. The small fire detection and extinguishing system based on single-chip microcomputer development according to claim 3, characterized in that: The fire control module judges the occurrence of the fire alarm, and transmits the information monitored by the fire control module to the upper computer through the network port, the CAN communication interface or the passive contact.

6. The small fire detection and extinguishing system based on single-chip microcomputer development according to claim 1, characterized in that: The fire control module comprises a power conversion circuit, a network port driving circuit, a CAN driving circuit, an RS485 driving circuit, a power output circuit, a switching value input circuit, a relay output circuit and an analog input circuit. The fire control module collects the signals transmitted by the flame detectors, monitors the electric starting circuit signals, controls the fire extinguishing and uploads the state information.

7. The small fire detection and extinguishing system based on single-chip microcomputer development according to claim 6, characterized in that: The power conversion circuit is used for receiving external DC 24V power supply. The network port driving circuit is used for Ethernet communication. The CAN driving circuit is used for CAN communication. The RS485 driving circuit is used for RS485 communication. The power output circuit is used for DC 24V power output. The switching value input circuit is used for collecting switching value signals. The relay output circuit is used for passive contact output. The analog input circuit is used for analog signal collection.

8. The small fire detection and extinguishing system based on single-chip microcomputer development according to claim 1, characterized in that: The flame detector receives the DC 24V power supply provided by the fire control module, and sends the fire alarm signals of the protected area and the fault signals of the flame detector to the fire control module through passive contacts.

9. The small fire detection and extinguishing system based on single-chip microcomputer development according to claim 8, characterized in that: The gas fire extinguishing device comprises a gas cylinder assembly and a pipeline accessory. The pressure sensor and the electromagnetic starter are located on the gas cylinder assembly. The fire control module provides DC 24V power supply for the pressure sensor. The pressure sensor is used for monitoring the gas pressure and feeding back the pressure information to the fire control module. The fire control module provides DC 24V power supply for the electromagnetic starter. The electromagnetic starter is used for starting the gas cylinder.

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