Hot gas aerogel fire extinguishing device

Abstract

The utility model relates to fire extinguishing device technical field, concretely relates to hot gas gel fire extinguishing device. Including fire detection module, including temperature sensor network, temperature sensor interval network arrangement in the area, central control unit is used for receiving the signal of fire detection module, and judges whether the fire disaster occurs, is still used for sending fire extinguishing instruction to hot gas gel generation and injection module, communication positioning module includes remote communication module and bimodulus positioning module, is used for sending fire alarm information and the positioning information of device to remote monitoring center, hot gas gel generation and injection module, including PWM voltage regulation circuit and stepping motor drive, the PWM voltage regulation circuit changes the average value of output voltage through the duty ratio of adjusting pulse signal to control hot gas gel generator heating power, stepping motor drive is used for controlling the direction and angle of hot gas gel nozzle. This technical scheme can improve the accuracy and real-time performance of fire extinguishing device.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing device technology, specifically to a thermal aerogel fire extinguishing device. Background Technology

[0002] Currently, common fire extinguishing technologies on the market mainly include water-based fire extinguishing systems, gaseous fire extinguishing systems, and dry powder fire extinguishing systems. Water-based fire extinguishing systems are widely used in various locations due to their low cost and wide availability. However, for some locations where water is incompatible, such as electrical equipment rooms, libraries, and archives, water-based fire extinguishing systems may cause secondary damage, leading to more serious losses. Gaseous fire extinguishing systems, such as those using heptafluoropropane or carbon dioxide, have advantages such as rapid fire extinguishing, non-conductivity, and no pollution to equipment. However, they also have drawbacks such as high storage pressure, a high risk of leakage, and some environmental impact. Dry powder fire extinguishing systems leave more residue after extinguishing, making cleanup difficult, and they are corrosive to precision equipment.

[0003] Thermal aerogel fire extinguishing technology, as a novel fire suppression technology, has been increasingly utilized in recent years. Thermal aerogel extinguishing agents are solid mixtures composed of oxidizers, reducing agents, and binders. In the event of a fire, the extinguishing agent undergoes a combustion reaction through thermal or electrical activation, producing a large amount of aerosol containing solid particles and gases. These aerosols can rapidly diffuse to all corners of the fire scene, extinguishing the fire by inhibiting the combustion chain reaction and reducing oxygen concentration, among other methods. Compared to traditional fire extinguishing technologies, thermal aerogel fire extinguishing technology has advantages such as high extinguishing efficiency, no residue after extinguishing, environmental friendliness, and small space occupation, effectively solving the problems that traditional fire extinguishing technologies encounter when applied in certain special locations.

[0004] However, the control methods of existing thermal aerogel generation and spraying modules are relatively simple. Most systems use fixed heating power and spray direction (or rely solely on omnidirectional spraying), making it difficult to dynamically adjust according to the actual situation at the fire scene. This not only affects the fire extinguishing effect but may also lead to waste of extinguishing agent and increase operating costs. Utility Model Content

[0005] The purpose of this invention is to propose a thermal aerogel fire extinguishing device, which can improve the accuracy and real-time performance of the fire extinguishing device.

[0006] To achieve the above objectives, embodiments of this disclosure provide a thermal aerogel fire extinguishing device, comprising: The fire detection module includes a temperature sensor network, wherein the temperature sensors are arranged in a networked manner within the area; The central control unit is used to receive signals from the fire detection module and determine whether a fire has occurred. It is also used to send fire extinguishing commands to the thermal aerogel generation and spraying module. The communication and positioning module includes a remote communication module and a dual-mode positioning module, which are used to send fire alarm information and device positioning information to a remote monitoring center; The thermal aerogel generating and spraying module includes a PWM voltage regulation circuit and a stepper motor drive. The PWM voltage regulation circuit changes the average value of the output voltage by adjusting the duty cycle of the pulse signal to control the heating power of the thermal aerogel generator. The stepper motor drive is used to control the direction and angle of the thermal aerogel nozzle.

[0007] Beneficial effects of the basic solution: The networked sensor deployment can cover multiple monitoring nodes in the area, which can reduce the probability of false alarms and missed alarms. Even if there is only a localized temperature rise in the early stage of a fire, it can be quickly detected, avoiding delays in fire detection due to monitoring blind spots. On the other hand, by comparing the temperature data of multiple sensors, if the temperature of a sensor in a certain area rises suddenly while the temperature of surrounding sensors is normal, the central control unit can reverse the calculation to determine the specific location of the fire, which is convenient for subsequent targeted fire suppression.

[0008] The combination of a PWM voltage regulation circuit and a stepper motor drive in the thermal aerogel generation and spraying module solves the problems of blind spraying and fixed power in traditional fire extinguishing devices. The stepper motor drive can adjust the direction and angle of the nozzle in real time according to the fire location fed back by the central control unit, so that the thermal aerogel acts directly on the core of the fire source, avoiding the waste of extinguishing agents caused by the all-area spraying of traditional devices, and reducing unnecessary coverage of equipment and materials in non-fire areas. The PWM voltage regulation circuit changes the heating power by adjusting the pulse duty cycle, which can ensure the fire extinguishing effect while avoiding the additional risks caused by insufficient power to extinguish the fire or excessive power due to fixed power.

[0009] The communication and positioning module can provide real-time remote alarms, shortening emergency response time. Meanwhile, the dual-mode positioning module can help the remote monitoring center quickly determine the specific location of the fire (especially suitable for complex areas such as large factories and warehouse parks), facilitating advance planning of rescue routes and allocation of firefighting resources, and improving overall emergency response efficiency.

[0010] As a feasible preferred embodiment, the fire detection module includes a gas sensor array, which employs a methane sensor, an acetylene sensor, and a hydrogen sensor integrated based on MEMS technology; the methane sensor operates on the principle of catalytic combustion; the acetylene sensor operates based on the principle of electrochemistry; and the hydrogen sensor operates on the principle of semiconductor gas sensing.

[0011] As a feasible preferred solution, the fire detection module also includes a composite flame detector, which uses a high-sensitivity photoelectric sensor to capture light signals of a specific wavelength emitted by the flame, convert them into electrical signals, and then uses an STM32 microcontroller to filter, amplify, and perform spectrum analysis on the electrical signals to determine whether a flame exists and the flicker frequency of the flame.

[0012] As a feasible preferred embodiment, the photoelectric sensor of the composite flame detector includes an infrared detection element and an ultraviolet detection element, which can simultaneously capture infrared and ultraviolet light signals emitted by the flame.

[0013] As a preferred feasible option, the gas collection ports of both the photoelectric sensor and the gas sensor array are located on the side of the thermal aerogel nozzle at the top of the device.

[0014] As a feasible preferred solution, the remote communication module adopts NB-IoT technology, and the dual-mode positioning module adopts the ATGM336H chip, which supports BeiDou and GPS dual-mode positioning.

[0015] As a feasible and preferred option, an emergency energy module is also included, comprising a main power supply and a backup battery.

[0016] As a feasible preferred solution, the main power supply adopts AC 220V input, and after rectification, filtering and voltage regulation, it provides a stable DC power supply for the fire extinguishing device.

[0017] As a feasible preferred option, the backup battery is a high-energy-density lithium-ion battery and is connected to the main power supply via an automatic switching circuit. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a thermal aerogel fire extinguishing device.

[0019] Figure 2 This is a schematic diagram of a thermal aerogel fire extinguishing device. Detailed Implementation

[0020] To make the technical solution and advantages of this application clearer, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this utility model, and are only used to explain this application, not to limit it. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated; they can be combined with each other to achieve better technical effects. The same reference numerals appearing in the accompanying drawings of the following embodiments represent the same features or components, and can be applied to different embodiments.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection (including various forms of mechanical connection, such as couplings or gear pairs), or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Furthermore, unless otherwise defined, the technical or scientific terms used in this description shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings: Reference Figure 1 The thermal aerogel fire extinguishing device includes a fire detection module, a central control unit, a thermal aerogel generation and spraying module, a communication and positioning module, and an emergency power supply module.

[0024] The fire detection module includes a gas sensor array, a composite flame detector, and a temperature sensor network.

[0025] The gas sensor array employs methane, acetylene, and hydrogen sensors integrated based on MEMS (Micro-Electro-Mechanical Systems) technology. MEMS technology enables the sensors to be small in size, low in power consumption, and highly sensitive.

[0026] The methane sensor uses the principle of catalytic combustion. When methane comes into contact with the catalyst on the sensor surface and undergoes a combustion reaction, it will cause a change in the sensor's resistance value. The methane concentration can be determined by measuring the change in resistance. Its detection range is 0-100% LEL (lower explosive limit), and its accuracy can reach ±3% LEL.

[0027] The acetylene sensor operates based on electrochemical principles. Acetylene undergoes a redox reaction on the sensor electrode surface, generating a current signal proportional to the acetylene concentration. Its detection range is 0-100ppm, with an accuracy of ±2ppm.

[0028] The hydrogen sensor uses the semiconductor gas sensing principle. Hydrogen gas adsorbed on the surface of the semiconductor material changes its conductivity. The hydrogen concentration is detected by measuring the change in conductivity. The detection range is 0 - 10000ppm, and the accuracy is ±5%FS.

[0029] A composite flame detector, based on an STM32 embedded system design. This detector can identify the flicker frequency of a flame, with a detection range of 1-20Hz.

[0030] The composite flame detector employs a high-sensitivity photoelectric sensor, which includes an infrared detection element and / or an ultraviolet detection element. This sensor captures light signals of specific wavelengths emitted by the flame and converts them into electrical signals. The STM32 microcontroller performs filtering, amplification, and spectrum analysis on the electrical signals to determine the presence and flicker frequency of a flame, and promptly sends a fire alarm signal to the central control unit.

[0031] The temperature sensor network uses the DS18B20 digital temperature sensor, which has advantages such as high measurement accuracy, strong anti-interference ability, and direct output of digital signals.

[0032] The sensors are arranged in a grid pattern within the protected area, enabling comprehensive and detailed monitoring of changes in ambient temperature. The preferred spacing is 1m.

[0033] The central control unit adopts a dual-core heterogeneous architecture, which in this embodiment is based on the ARM Cortex-M7 core. The dual-core heterogeneous architecture distributes control tasks and processing tasks to different cores, improving the system's processing efficiency and real-time performance.

[0034] The central control unit receives signals from the fire detection module and determines whether a fire has occurred. For example, when the gas sensor array detects that the methane concentration exceeds a set threshold, the temperature sensor network detects that the local temperature rise reaches a threshold, and the composite flame detector issues a flame alarm signal, the central control unit determines that a fire has occurred. Upon determining that a fire has occurred, the central control unit immediately issues a fire extinguishing command to the thermal aerogel generation and spraying module, and simultaneously sends fire alarm information and device location information to the remote monitoring center via the communication and positioning module.

[0035] The thermal aerogel generation and spraying system includes a PWM voltage regulation circuit and a stepper motor drive.

[0036] The PWM voltage regulation circuit is used to control the heating power of the thermal aerogel generator. The PWM (Pulse Width Modulation) voltage regulation circuit in the thermal aerogel generation and spraying module is used to control the heating power of the thermal aerogel generator. The PWM voltage regulation circuit changes the average value of the output voltage by adjusting the duty cycle of the pulse signal, thereby achieving precise control of the heating power.

[0037] For example, when lower heating power is required, the PWM voltage regulation circuit outputs a pulse signal with a shorter duty cycle, resulting in less electrical energy being obtained by the heating element of the thermal aerogel generator per unit time, thus reducing the heating power. Conversely, when higher heating power is required, it outputs a pulse signal with a longer duty cycle, increasing the heating power. This module supports a maximum heating power of 1000W, which can meet the fire extinguishing needs of fires of different sizes.

[0038] A stepper motor drive is used to control the direction and angle of the thermal aerogel nozzle, thereby controlling the spray direction and spray angle range of the thermal aerogel. The rotation angle and speed of the stepper motor are controlled by pulse signals from the central control unit.

[0039] For example, when a fire occurs, the central control unit adjusts the direction of the thermal aerogel spray nozzles using a stepper motor based on the fire's location information, ensuring the aerogel is accurately sprayed onto the fire site and improving fire extinguishing efficiency. Simultaneously, the stepper motor can also control the nozzle opening and adjust the aerogel spray flow rate to adapt to different fire intensities.

[0040] The central control unit can determine the location of the fire based on the temperature sensor network, and then send a stepper motor drive signal.

[0041] The communication and positioning module includes a remote communication module and a dual-mode positioning module.

[0042] The remote communication module uses NB-IoT (Narrowband Internet of Things) technology to communicate with the remote monitoring center and enable remote monitoring. NB-IoT communication technology features wide coverage, low power consumption, and large connection capacity, enabling stable data transmission in complex network environments.

[0043] This module wirelessly transmits fire alarm information and device status information from the central control unit to a remote monitoring center. Simultaneously, it receives control commands from the monitoring center, enabling remote control and management of the fire extinguishing device. For example, the monitoring center can remotely start or stop the aerogel fire extinguishing device and adjust its operating parameters via the remote communication module.

[0044] The dual-mode positioning module uses the ATGM336H chip, which supports both BeiDou and GPS dual-mode positioning, achieving centimeter-level positioning accuracy. In the event of a fire, the dual-mode positioning module can quickly and accurately determine the location of the fire extinguishing equipment and transmit this information to a remote monitoring center via the NB-IoT communication module.

[0045] For example, when a fire occurs in a large industrial plant, the dual-mode positioning module can accurately determine the area of ​​the fire and the specific location of the fire extinguishing equipment, making it easier for rescue personnel to quickly reach the scene to carry out fire extinguishing and rescue work, and improving emergency response efficiency.

[0046] The emergency power system includes a main power supply and a backup battery. The main power supply module uses a 220V AC input, which, after rectification, filtering, and voltage regulation, provides a stable DC power supply to the entire fire extinguishing device. The main power supply has overcurrent protection, overvoltage protection, and short-circuit protection functions to ensure electrical safety during normal operation. The backup battery uses a high-energy-density lithium-ion battery. The backup battery is connected to the main power supply via an automatic switching circuit. When the main power supply is working normally, the backup battery is charging; when the main power supply fails, the automatic switching circuit quickly switches the power supply to the backup battery, ensuring the normal operation of the fire extinguishing device.

[0047] Reference Figure 2 This is one form of the device, which has a nozzle, a photoelectric sensor (including an infrared detection element and an ultraviolet detection element) and an air inlet on its top. When in use, the device can be suspended above the monitoring area.

[0048] The above content is merely an embodiment of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can improve and implement this solution based on the guidance provided in this application and their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A thermal aerogel fire extinguishing device, characterized by: include: The fire detection module includes a temperature sensor network, wherein the temperature sensors are arranged in a networked manner within the area; The central control unit is used to receive signals from the fire detection module and determine whether a fire has occurred. It is also used to send fire extinguishing commands to the thermal aerogel generation and spraying module. The communication and positioning module includes a remote communication module and a dual-mode positioning module, which are used to send fire alarm information and device positioning information to a remote monitoring center; The thermal aerogel generating and spraying module includes a PWM voltage regulation circuit and a stepper motor drive. The PWM voltage regulation circuit changes the average value of the output voltage by adjusting the duty cycle of the pulse signal to control the heating power of the thermal aerogel generator. The stepper motor drive is used to control the direction and angle of the thermal aerogel nozzle.

2. The hot aerogel fire extinguishing device of claim 1, wherein: The fire detection module includes a gas sensor array, which employs a methane sensor, an acetylene sensor, and a hydrogen sensor integrated based on MEMS technology. The methane sensor operates on the principle of catalytic combustion; the acetylene sensor operates on the principle of electrochemistry; and the hydrogen sensor operates on the principle of semiconductor gas sensing.

3. The hot aerogel fire extinguishing device of claim 2, wherein: The fire detection module also includes a composite flame detector, which uses a high-sensitivity photoelectric sensor to capture light signals of specific wavelengths emitted by flames and convert them into electrical signals. The STM32 microcontroller then filters, amplifies, and performs spectrum analysis on the electrical signals to determine whether a flame exists and the flame's flicker frequency.

4. The hot aerogel fire extinguishing device of claim 3, wherein: The photoelectric sensor of the composite flame detector includes an infrared detection element and an ultraviolet detection element, which can simultaneously capture infrared and ultraviolet light signals emitted by the flame.

5. The hot aerogel fire extinguishing device of claim 4, wherein: The gas collection ports of both the photoelectric sensor and the gas sensor array are located on the side of the thermal aerogel nozzle at the top of the device.

6. The hot aerogel fire extinguishing device of claim 1, wherein: The remote communication module uses NB-IoT technology, and the dual-mode positioning module uses the ATGM336H chip, supporting BeiDou and GPS dual-mode positioning.

7. The hot aerogel fire extinguishing device of claim 1, wherein: It also includes an emergency energy module, comprising a main power supply and backup batteries.

8. The hot aerogel fire extinguishing device of claim 7, wherein: The main power supply uses AC 220V input, and after rectification, filtering and voltage regulation, it provides a stable DC power supply for the fire extinguishing device.

9. The hot aerogel fire extinguishing device of claim 7 or 8, wherein: The backup battery is a high-energy-density lithium-ion battery and is connected to the main power supply via an automatic switching circuit.

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