WO2022068692A1

WO2022068692A1 - Fire-fighting system

Info

Publication number: WO2022068692A1
Application number: PCT/CN2021/120288
Authority: WO
Inventors: 娄越; 郑瑾; 胡波; 娄云舒; 徐文晨
Original assignee: 合肥德特飞思信息技术有限责任公司
Priority date: 2020-09-30
Filing date: 2021-09-24
Publication date: 2022-04-07
Also published as: CN112190851A

Abstract

A fire-fighting system, comprising a power supply unit (2), a control unit (4), a fire extinguishing unit (3) and a fire detection unit (5) which are mutually independent. The power supply unit (2) is electrically connected to the control unit (4), the control unit (4) is respectively in communication connection with the fire extinguishing unit (3) and the fire detection unit (5), a fire extinguishing medium is stored in the fire extinguishing unit (3), and the control unit (4) is further in communication connection with a manual alarm and a manual controller. The fire-fighting system has the advantages of fire-fighting operation being achieved merely by means of closed-loop control of the fire-fighting system without the need for external detection, control and participation of a fire-fighting medium generation and conveying system, the fire-fighting system being able to be popularized and used in a scene with poor conditions, and fire situation information being able to be sent out by means of manual instructions when necessary to control the fire-fighting system to conduct fire extinguishing work or stop an alarm, such that the fire-fighting system is managed and controlled more flexibly, the composition units are relatively independent, detection and replacement are convenient, and distributed arrangement can be achieved without influencing original space distribution.

Description

a fire fighting system

technical field

The invention relates to the technical field of fire safety, in particular to a fire protection system.

Background technique

There are a lot of fire hazards in production and life. With the development of science and technology, more and more scenarios rely on fire protection systems for fire prevention and control. Most of the existing fire protection systems rely on sensors to detect fire information, supply fire-fighting media through pipes, and provide fire-fighting media. The production and transmission systems are highly dependent, and are not suitable for building fire protection systems in small spaces and remote areas.

For electronic equipment, rack-mounted installation has become the mainstream of computer room design and construction. Due to the high-density characteristics of rack-mounted installation, there are often more than ten servers installed in one cabinet, disk storage with hundreds of TB capacity, or control of the entire Network communication in the campus and even larger areas. Once a fire accident occurs in the cabinet, the damage to the hardware and software systems will lead to high direct economic losses, and the indirect economic losses caused by the loss of precious data, business stop, and communication interruption are immeasurable; therefore, fire protection System design has always been an indispensable and important link in the design of electronic information room.

The utility model patent with publication number CN203861824U discloses a fire extinguishing device, which includes a box body, the lower part of the box body has a sealed cavity for storing liquid fire extinguishing agent, and a control module, a fire detector, a control chip and a control module are arranged on the basis of the sealed cavity. The power supply is used to detect the fire. A gas generator connected to the control module is arranged above the inside of the sealed cavity. The inside of the sealed cavity is provided with a guide pipe extending to the bottom of the sealed cavity. The end of the guide pipe extends to the fire extinguishing. A nozzle is arranged outside the device, and a sealing film is arranged on the nozzle. When a fire occurs, the gas generator generates high-pressure gas to spray the fire extinguishing agent from the guide pipe, destroys the sealing film and sprays it from the nozzle to extinguish the fire. The fire extinguishing device is built as a whole based on the box body, which is convenient to be directly placed in a specific area for fire extinguishing, but it is difficult to test and maintain, and generally can only be replaced as a whole. In addition, the fire extinguishing agent is directly stored in the sealed cavity inside the box body, and the partition plate that needs to be welded in the sealed cavity is set in the box body, so the sealing effect is not good, and the guide pipe passes through the partition plate to also bring the tightness The problem is that during transportation and use, the liquid will overflow or volatilize, which may corrode and damage various electrical devices on the upper part of the box. The sealing film is a one-time use product. The quality of the product cannot be checked before use, and it cannot be guaranteed that it can be ruptured under certain pressure. If it cannot be ruptured during use, the entire device will lose its effectiveness. When in use, the fire extinguishing agent first breaks through the sealing film and then sprays from the nozzle, and the fragments of the sealing film may block the nozzle. In addition, after the gas generator of the utility model works, the gas directly contacts the fire extinguishing agent, and the fire extinguishing agent is pressed out from the guide pipe to extinguish the fire. However, in actual use, the gas will enter the liquid fire extinguishing agent, even before the fire extinguishing. The agent is ejected from the diversion pipe, so that the fire extinguishing agent cannot be ejected in the desired state, and the entire fire extinguishing work is uncontrollable and cannot be used for actual fire fighting work.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a fire protection system in which each component unit is independently distributed in the work space and does not require external fire protection medium.

The present invention solves the above technical problems through the following technical solutions: a fire protection system, comprising a power supply unit, a control unit, a fire extinguishing unit and a fire detection unit that are independent of each other; the power supply unit is electrically connected to the control unit, and the control units are respectively It is connected in communication with the fire extinguishing unit and the fire detection unit, the fire extinguishing unit stores fire extinguishing medium, and the control unit is also connected with a manual alarm and a manual controller in communication.

The invention obtains the detection value in the scene through the fire detection unit, and transmits it to the control unit. When the control unit judges that there is a fire, it controls the fire extinguishing unit to carry out the fire extinguishing work, so that the fire fighting operation is only realized through the closed-loop control of the fire protection system itself, without the need for external The detection, control, and fire-fighting medium generation and transportation system are involved, which can be popularized and used in scenes with poor conditions, and manual alarms and manual controllers are further set up, which can send fire information through manual instructions when necessary, or control The fire fighting system performs fire extinguishing work or disarms the alarm, so as to control the fire fighting system more flexibly and facilitate testing and testing; each component unit is set relatively independently, which facilitates separate testing and replacement, reduces operation and maintenance costs, and can be used in small spaces. The lower distribution is set in the space and will not affect the original space distribution.

Preferably, the power supply unit, the control unit, the fire extinguishing unit, and the fire detection unit are independently arranged in the space where fire fighting operations are required.

Preferably, the power supply unit, the control unit, the fire extinguishing unit, and the fire detection unit are independently arranged in a cabinet, and the cabinet can be directly fixed in the cabinet.

Preferably, a through hole is formed on the surface of the chassis, and the fire detection unit fixed in the chassis is arranged at the position of the through hole.

Preferably, the fire extinguishing unit comprises a fire extinguishing tank and a nozzle, a liquid storage tank is arranged inside the fire extinguishing tank, the liquid perfluorohexanone is stored in the liquid storage tank, and a gas generator is provided at the end of the liquid storage tank away from the nozzle , a piston is arranged between the gas generator and the liquid storage tank, and the gas generator is connected in communication with the control unit. When the control unit starts the fire extinguishing unit, the gas generator generates gas, and the gas pushes the piston to squeeze the perfluoro in the liquid storage tank. Hexanone is atomized and sprayed from a nozzle, and the nozzle is provided with a one-way valve that allows the perfluorohexanone to leave the liquid storage tank.

Preferably, the fire detection unit includes at least two different types of integrated temperature and smoke detectors.

Preferably, the power supply unit includes a switching power supply and a battery that are respectively electrically connected to the control unit, and the switching power supply is electrically connected to the battery.

Preferably, the control unit is also communicatively connected with an audible and visual alarm.

Preferably, the surface of the chassis is further provided with a display control panel, the control unit is connected in communication with the display control panel, and when the fire detection unit detects a fire, the control unit displays alarm information through the display control panel.

Preferably, the control unit sends out a fire alarm signal based on the detection signal of the fire detection unit or the control command of the manual alarm, and executes the control command if it receives the control signal sent by the manual controller; if it does not receive the manual controller The control command issued, then judge whether the duration of the abnormal signal reaches the delay time; if the duration of the abnormal signal does not reach the delay time, turn off the fire alarm signal, continue to obtain the detection signal of the fire detection unit, and start the fire extinguishing unit if the delay time is reached ;

After the fire-extinguishing unit is activated, when the fire alarm is lifted, the control unit conducts a self-check on the fire-fighting system. If the signal received by the control unit is abnormal, a fault warning is issued; in the absence of a fire, the control unit Periodically perform system self-checks.

The advantage of the fire protection system provided by the present invention is that the detection value in the scene is acquired by the fire detection unit and transmitted to the control unit. When the control unit judges that there is a fire, it controls the fire extinguishing unit to carry out fire extinguishing work, so that only the fire protection system itself The closed-loop control of the fire-fighting operation does not require external detection, control, and the participation of the fire-fighting medium generation and transportation system. It can be popularized and used in scenes with poor conditions. It also further sets up manual alarms and manual controllers, which can be used when necessary. Send out fire information through manual instructions, or control the fire protection system to carry out fire extinguishing work or cancel the alarm, so as to control the fire protection system more flexibly, and facilitate testing and detection; each component is set relatively independently, which is convenient for independent detection and replacement. The operation and maintenance cost can be distributed in the space when the space is small, and the original space distribution will not be affected. Using perfluorohexanone as a fire-fighting medium can quickly cool the temperature and suppress the free radicals generated by the chain reaction during the combustion process, so as to quickly extinguish the fire, with less dosage and fast onset. Although perfluorohexanone is a liquid, it has good insulation performance. It can work without interruption during fire fighting to avoid the loss caused by server shutdown; the power supply unit is equipped with a backup power supply to ensure that the entire fire extinguishing device can be used normally in the event of an unexpected power failure; by setting a display control unit on the chassis, it is convenient to operate and Displaying the alarm information, through the sound and light alarm, it can effectively remind the staff to deal with and avoid risks, and can be interconnected with various existing fire monitoring systems for unified management.

Description of drawings

1 is a schematic diagram of a perfluorohexanone-based fire extinguishing system provided by an embodiment of the present invention;

2 is a schematic diagram of a fire extinguishing unit of a perfluorohexanone-based fire extinguishing system provided by an embodiment of the present invention;

3 is a working principle diagram of a perfluorohexanone-based fire extinguishing system provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a perfluorohexanone-based fire extinguishing system provided in Embodiment 2 of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and with reference to the accompanying drawings. Obviously, the described embodiments are part of the implementation of the present invention. examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

As shown in FIG. 1 , this embodiment provides a fire protection system, including a power supply unit 2, a control unit 4, a fire extinguishing unit 3 and a fire detection unit 5 that are independently set according to the scene in a space that requires fire protection operations. The fire extinguishing unit 3 stores a fire extinguishing medium, the power supply unit 2 is electrically connected with the control unit 4, the control unit 4 is connected in communication with the fire extinguishing unit 3 and the fire detection unit 5 respectively, and the control unit 4 is also connected in communication with a manual alarm. device and manual controller.

The working principle of the fire protection system provided in this embodiment is as follows: the types of the fire detection unit 5 and the fire extinguishing unit 3 are adaptively selected according to the application scene, the detection value in the scene is obtained through the fire detection unit 5, and transmitted to the control unit 4 to control the When the unit 4 judges that there is a fire, it controls the fire extinguishing unit 3 to carry out the fire extinguishing work, so that the fire fighting operation is only realized through the closed-loop control of the fire fighting system itself, without the participation of external detection, control, and the production and delivery system of the fire fighting medium, which can be used in poor conditions. For example, in remote communication base stations, due to the lack of conditions for supplying fire-fighting media, fire-fighting safety has become a difficult problem. The fire-fighting system provided in this embodiment can well solve its fire-fighting operations in unattended conditions. The problem. This embodiment is further provided with a manual alarm and a manual controller, which can send out fire information through manual instructions when necessary, or control the fire fighting system to carry out fire fighting work or cancel the alarm, so as to more flexibly control the fire fighting system and facilitate testing and testing. Detection; each component unit is set relatively independently, which is convenient for independent detection and replacement, reduces operation and maintenance costs, and can be distributed in the space in the case of narrow space, without affecting the original spatial distribution.

Although the fire protection system provided in this embodiment can meet the fire protection requirements under simple conditions, it is not limited to special scenarios, and the fire protection system can be used in any scenario, such as shopping malls, office buildings, crowded places, etc. In terms of the selection of fire extinguishers, general water-based fire extinguishers or dry powder fire extinguishers can be used, but the use of water and dry powder fire extinguishers requires a large amount and needs to cover the entire space, and these fire-fighting media may cause certain losses to people and property, especially for Libraries, archives, museums, or electrical cabinets, communication base stations and other power facility scenarios, these fire-fighting media may bring irreparable losses.

Based on this, in this embodiment, perfluorohexanone is preferably used as a fire-fighting medium to build a fire-extinguishing unit 3. Referring to FIG. 2, the fire-extinguishing unit 3 includes a fire-extinguishing tank 31 and a nozzle 32. The fire-extinguishing tank 31 is internally provided with a nozzle 32 that communicates with it. A liquid storage tank 33 for storing liquid perfluorohexanone, one end of the liquid storage tank 33 away from the nozzle 32 is provided with a gas generator 35, and a piston is provided between the gas generator 35 and the liquid storage tank 33, and the gas generated The controller 35 is connected in communication with the control unit 4 . The fire detection unit 5 transmits the monitored signal to the control unit 4. When the signal of the fire detection unit 5 exceeds a preset threshold, the control unit 4 provides a strong current to the gas generator 35, and the substance in the gas generator 35 is at a high temperature. The chemical reaction produces a large amount of gas, and the gas pushes the piston 34 to move to squeeze the liquid perfluorohexanone, so that the perfluorohexanone is atomized and sprayed from the nozzle 32, thereby spraying the fire extinguishing medium into the environment. The nozzle 32 has a one-way valve. The one-way valve closes the nozzle through a spring. Under the pressure of the perfluorohexanone in the liquid storage tank 33, the one-way valve is squeezed to release the nozzle. When the pressure returns to normal, the nozzle is released. The spring automatically presses the check valve back to its original position, sealing the nozzle.

As a fire-fighting medium, perfluorohexanone can quickly cool down and inhibit the free radicals generated by the chain reaction during the combustion process, so as to quickly extinguish the fire. Most of the scenarios are used; and although perfluorohexanone is a liquid, it has good insulation properties, and can work without interruption when it is used for fire extinguishing in power equipment scenarios to avoid losses caused by power system shutdowns; compared with traditional fire extinguishing media, Perfluorohexanone can quickly extinguish the fire in a small space without affecting other spaces, so that the expansion of the fire can be controlled and the impact on the space where no fire has occurred can be reduced.

The power supply unit 2 includes a switching power supply 21 and a battery 22 that are respectively electrically connected to the control unit 4. The switching power supply 21 is connected to an AC power supply, and the switching power supply 21 is also electrically connected to the battery 22. The switching power supply 21 performs step-down processing on the AC power. , supply the control unit 4 to support the work of the entire fire protection system. In the event of an accident such as a fire, if a power outage occurs, the battery 22 can be used to support the work of the entire system in time to carry out fire protection operations to ensure that the fire protection system can be used under special circumstances. normal operation. The storage battery 22 preferably uses a lead-acid battery with stable performance, so as to avoid the accidental fire caused by the storage battery 22 itself.

The fire detection unit 5 selects a temperature-smoke integrated detector that can monitor temperature and smoke at the same time. Those skilled in the art can also add a temperature-sensing cable (not shown) as needed, thereby expanding the range of temperature detection. The numerical value of the fire detection unit 5 is controlled, and if any numerical value meets the triggering condition, the control unit 4 controls the air generator 35 to work to carry out fire extinguishing and cooling. In a preferred embodiment, at least two different types of integrated temperature and smoke detectors are provided, so that the false alarm rate can be reduced, the detection accuracy can be improved, and the normal operation of the system can be ensured.

The control unit 4 is also communicatively connected with an acousto-optic alarm, and the control unit 4 sends out a fire alarm signal when judging that a fire occurs, and the fire alarm signal includes the acousto-optic signal sent by the acousto-optic alarm. Sometimes after a fire occurs, the control unit 4 will be damaged, so that the fire extinguishing work cannot be carried out, and the management personnel cannot be notified in time for processing. In the preferred embodiment, the sound and light alarm can be directly connected to the fire detection unit 5. When the value exceeds the threshold, the sound and light alarm can be directly controlled to give an alarm without the need for the control unit 4 to issue an instruction. In order to facilitate the distinction, different types of alarm signals can be configured for the sound and light alarms controlled by the fire detection unit 5 and the control unit respectively.

Referring to FIG. 3 , the working principle of the fire protection system provided in this embodiment is as follows: after the fire protection system is activated, the control unit 4 determines whether there is a fire based on the detection signal of the fire detection unit 5. When the staff finds a fire, they can also Before the control unit 4 makes a corresponding judgment, manually send out a fire signal through the manual alarm, and after the control unit 4 receives the fire signal, it sends out a fire alarm signal. Fire extinguishing unit 3 or turn off the fire alarm signal; if the control command sent by the manual controller is not received, the control unit 4 judges whether the duration of the abnormal signal reaches the delay time, and if the abnormal signal judged according to the data obtained by the fire detection unit 5 continues If the time does not reach the delay time, turn off the fire alarm signal and continue to carry out fire monitoring; if the duration of the abnormal signal reaches the delay time, start the fire extinguishing unit 3 to carry out fire extinguishing. In this embodiment, the delay time is set to 28S, which can be flexibly used. to adjust the delay time.

If the fire alarm fails to be lifted after the fire extinguishing unit 3 extinguishes the fire, the control unit 4 continues to carry out the fire extinguishing work, and sends a signal to remind manual participation in the fire extinguishing work or emergency avoidance, and controls the working state according to manual instructions; if the fire alarm is lifted, the system starts Self-check, the control unit 4 judges whether there is any abnormality according to the parameters of the fire detection unit 5, the fire extinguishing unit 4 and other parts, for example, whether the data of the fire detection unit 5 is obviously wrong or disappears, if there is an abnormality, a fault warning is issued to remind the work During the normal working process, the control unit 4 will periodically start the system self-check, and if the self-check time is reached, it will check whether the parameters of each part are normal, and issue a warning when there is a fault.

Wherein, the manual alarm device and the manual controller can be alarm buttons and control buttons set on the site. During the on-site inspection, if the staff finds an abnormality, they can timely alarm and deal with them through the buttons, and can also reflect the on-site situation to the control center. Send out alarm information and control operations by the management of the control center. Referring to FIG. 1 again, the control unit 4 is also communicatively connected with an Internet of Things transmission unit, and the Internet of Things transmission unit can upload the data obtained by the control unit 4 in real time to The integrated control system makes it convenient for managers to check the status of the site in time. For complex scenes, many fire extinguishing devices may be set up. By uploading data in real time, the location of abnormal points can be quickly determined, so as to respond quickly. At the same time, the management personnel can issue instructions through the integrated control system, and transmit them to the control unit 4 through the Internet of Things transmission unit, so that the control unit 4 can send an alarm signal or carry out fire fighting operations, and can turn off the alarm signal in time when a false alarm occurs. The Internet of Things transmission unit can communicate through wired or wireless methods, such as Ethernet, RS485, WiFi, RS232, 4G, 5G and other communication methods.

Embodiment 2

Referring to FIG. 4 , the difference between this embodiment and the first embodiment is that the power supply unit 2 , the control unit 4 , the fire extinguishing unit 3 , and the fire detection unit 5 are arranged in the chassis 1 independently of each other, and the chassis 1 can be directly fixed to the chassis 1 . Inside the cabinet, the cabinet 1 is connected to the control system of the cabinet. The surface of the cabinet 1 is provided with through holes to facilitate smoke and temperature detection by the fire detection unit 5. In this embodiment, the cabinet 1 is provided with two different The two fire detection units 5 are respectively connected to the control unit 3 in communication. By integrating the entire fire fighting system in the chassis 1, it is convenient to directly install it in the cabinet. The fire extinguishing unit 3 selects perfluorohexanone as the fire extinguishing medium. According to the effective range of the fire extinguishing unit 3, multiple fire extinguishing units 3 can be set in combination with the cabinet space. Therefore, in the event of a fire, the entire cabinet can be put out for fire fighting; or multiple independent fire fighting systems can be set up, and each fire fighting system can carry out fire fighting operations independently to reduce the influence of the unfired area.

The sound and light alarm is arranged on the front surface of the cabinet 1, which can be easily observed. The front surface of the chassis 1 is also provided with a display control panel (not shown) that communicates with the control unit 4. The display control panel can display system status, fire information, issue control commands, and define its functions as needed. . When there is a fire, the fire alarm signal sent includes the sound and light signal sent by the sound and light alarm and the fire information displayed by the display control panel.

The fire extinguishing tank 31 has a substantially cylindrical structure, and the nozzle 32 is disposed toward the rear of the case 1. The rear of the case 1 is provided with a through hole that allows the nozzle 32 to pass through, so as to facilitate the release of fire-fighting medium; the fire extinguishing tank 31 passes through the clamp 36 It is fixed inside the chassis 1. Further, the power supply unit 2, the control unit 4, the fire extinguishing unit 4, the fire detection unit 5, the sound and light alarm, the display control panel and other components are all detachably fixed to the chassis through bolts. 1 inside, so that any part can be replaced independently, which is convenient for maintenance.

The rear of the chassis 1 is also provided with a power interface 23, which provides AC power for the switching power supply 21 through the power interface 23, thereby supplying power to the system and facilitating the direct installation of the chassis 1 in the cabinet as a whole.

The surface of the chassis 1 can also be set with a debugging interface and a power button as required. The chassis 1 is a 19-inch 2U chassis, which is fixed in the cabinet by conventional chassis fixing methods such as mounting ears or guide rails, and mounting ears 11 are provided at both ends of the front surface of the chassis 1 .

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A fire protection system is characterized in that: it includes a power supply unit, a control unit, a fire extinguishing unit and a fire detection unit which are independent of each other; the power supply unit is electrically connected with the control unit, and the control unit is respectively connected in communication with the fire extinguishing unit and the fire detection unit , the fire extinguishing unit stores fire extinguishing medium, and the control unit is also connected with a manual alarm and a manual controller in communication.
A fire protection system according to claim 1, wherein the power supply unit, the control unit, the fire extinguishing unit and the fire detection unit are independently arranged in the space where fire fighting operations are required.
The fire protection system according to claim 1, wherein the power supply unit, the control unit, the fire extinguishing unit, and the fire detection unit are independently arranged in a cabinet, and the cabinet can be directly fixed in the cabinet.
The fire protection system according to claim 3, wherein a through hole is formed on the surface of the case, and the fire detection unit fixed in the case is arranged at the position of the through hole.
A fire fighting system according to any one of claims 1-3, wherein the fire extinguishing unit comprises a fire extinguishing tank and a nozzle, a liquid storage tank is arranged inside the fire extinguishing tank, and the liquid storage tank stores Liquid perfluorohexanone, a gas generator is arranged at the end of the liquid storage tank away from the nozzle, a piston is arranged between the gas generator and the liquid storage tank, the gas generator is connected in communication with the control unit, and when the control unit starts the fire extinguishing unit, The gas generator generates gas, the gas pushes the piston to squeeze the liquid storage tank, and sprays the perfluorohexanone from the nozzle, and the nozzle is provided with a one-way valve that allows the perfluorohexanone to leave the liquid storage tank.
The fire protection system according to any one of claims 1-3, wherein the fire detection unit comprises at least two different types of integrated temperature and smoke detectors.
The fire protection system according to any one of claims 1 to 3, wherein the power supply unit comprises a switching power supply and a battery that are respectively electrically connected to the control unit, and the switching power supply is electrically connected to the battery.
A fire protection system according to any one of claims 1-3, characterized in that: the control unit is also communicatively connected with an audible and visual alarm.
A fire protection system according to claim 3, characterized in that: the surface of the chassis is further provided with a display control panel, the control unit is connected to the display control panel in communication, and when the fire detection unit detects a fire, the control unit controls the display through the display The panel displays alarm information.
A fire protection system according to any one of claims 1-3, wherein the control unit sends out a fire alarm signal based on the detection signal of the fire detection unit or the control instruction of the manual alarm, if the manual controller is received If the control signal sent by the manual controller is not received, the control command is executed; if the control command sent by the manual controller is not received, it is judged whether the duration of the abnormal signal reaches the delay time; if the duration of the abnormal signal does not reach the delay time, the fire alarm signal is turned off, Continue to obtain the detection signal of the fire detection unit, and start the fire extinguishing unit if the delay time is reached;

After the fire-extinguishing unit is activated, when the fire alarm is lifted, the control unit conducts a self-check on the fire-fighting system. If the signal received by the control unit is abnormal, a fault warning is issued; in the absence of a fire, the control unit Periodically perform system self-checks.