Fire extinguishing device and switch cabinet

Abstract

The present invention relates to the technical field of fire extinguishing in special spaces, and in particular to a fire extinguishing device and switch cabinet. The fire extinguishing device comprises a housing, a fire extinguishing body, and a trigger assembly. The housing is provided with a receiving chamber and a nozzle, the nozzle being connected to the receiving chamber. The fire extinguishing body is disposed in the receiving chamber. The fire extinguishing body is a solid body made of a first fire extinguishing medium and a second fire extinguishing medium. The trigger assembly comprises a connected fire sensor and a heating element. When the fire sensor detects a fire, the heating element activates, heating the fire extinguishing body. The fire extinguishing body is converted from a solid to a gas by the heat. The high-pressure gas continuously accumulated in the receiving chamber is eventually ejected toward the fire area through the nozzle. The ions in the high-pressure gas enter the flame and react. The ions freely attach to oxygen ions, hydrogen ions, and hydroxide ions, and carry these ions away from the flame, extinguishing the flame. The products generated during the flame extinguishing process are gaseous and will not adhere to electrical equipment, thus not affecting the repair and cleaning of the electrical equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of special space fire extinguishing, in particular to a fire extinguishing device and a switch cabinet. Background Art

[0002] In recent years, with China's rapid economic development, electricity demand has also increased rapidly. This means that electrical equipment needs to operate at high loads for extended periods, significantly increasing the risk of fire. Most electrical equipment operates unsupervised, and if a fire breaks out, it can't be extinguished in a timely manner. This not only impacts power supply but, in severe cases, threatens life and property. For example, electrical equipment such as switchgear cable compartments, switchgear secondary compartments (battery compartments), and low-voltage meter boxes often suffer from cramped space, complex wiring, and dense connections. Cable connections in switchgear can experience localized temperature spikes due to poor contact, aging, or excessive transient current, leading to breakdown and burnout. Automated switchgear must be equipped with batteries as a backup power source for terminals, but these batteries can also swell, leak, and explode after prolonged use. Low-voltage wiring in low-voltage meter boxes is also a frequent source of fire due to overload or poor contact. Therefore, developing efficient, intelligent, and automatic fire extinguishing devices for electrical equipment is crucial for ensuring power supply reliability and safety while also addressing urgent needs and eliminating potential social safety risks. This is of great practical significance.

[0003] However, traditional fire extinguishers, such as dry powder and foam extinguishers, are not only bulky and space-consuming, but also produce a large amount of residue during the extinguishing process. This residue adheres to electrical equipment, directly hindering its repair and cleaning. Furthermore, these traditional extinguishers can only extinguish open flames, but cannot effectively reduce the temperature of the fire source, nor can they eliminate the potential for secondary fires. Summary of the Invention

[0004] The present invention provides a fire extinguishing device and a switch cabinet, which are used to solve the technical problem in the prior art that when using traditional fire extinguishing devices to extinguish fires on electrical equipment, residues generated during the fire extinguishing process will adhere to the electrical equipment, affecting the repair and cleaning of the electrical equipment.

[0005] The first aspect of the present invention provides a fire extinguishing device, comprising:

[0006] Housing, extinguishing body and trigger assembly;

[0007] The housing is provided with a receiving cavity and an injection port, and the injection port is communicated with the receiving cavity;

[0008] The fire extinguishing body is arranged in the accommodating cavity;

[0009] The fire extinguishing body is a solid made of a first fire extinguishing medium and a second fire extinguishing medium. The first fire extinguishing medium is used to extinguish the open flame, and the second fire extinguishing medium is used to reduce the temperature of the fire source.

[0010] When the fire extinguishing element is heated, it will transform from solid to gas;

[0011] The trigger assembly includes a fire sensor and a heating element connected to each other. When the fire sensor senses a fire, the heating element heats the fire extinguishing body.

[0012] In a first possible implementation of the fire extinguishing device of the first aspect, the first fire extinguishing medium is aerogel;

[0013] The second fire extinguishing medium is perfluorohexanone.

[0014] In combination with the first possible implementation of the fire extinguishing device of the first aspect, in the second possible implementation of the fire extinguishing device of the first aspect, the mass ratio of the aerogel and the perfluorohexanone constituting the fire extinguishing body is 65%:35%; or

[0015] The mass ratio of the aerogel and the perfluorohexanone constituting the fire extinguishing body is 74%:26%.

[0016] In a third possible implementation of the fire extinguishing device of the first aspect, the fire sensor is a temperature sensor;

[0017] The heating element includes a power supply and a heating wire connected to each other, and the heating wire is arranged in the accommodating cavity;

[0018] The temperature sensor is arranged on the shell and connected with the power supply.

[0019] In combination with the fire extinguishing device provided in the first aspect, the first possible implementation of the fire extinguishing device in the first aspect, the second possible implementation of the fire extinguishing device in the first aspect, or the third possible implementation of the fire extinguishing device in the first aspect, in the fourth possible implementation of the fire extinguishing device in the first aspect, further comprising:

[0020] A cooling component for cooling the fire extinguishing body;

[0021] The cooling component is arranged in the accommodating cavity and connected to the fire extinguishing body.

[0022] In combination with the fire extinguishing device provided in the first aspect, the first possible implementation of the fire extinguishing device in the first aspect, the second possible implementation of the fire extinguishing device in the first aspect, or the third possible implementation of the fire extinguishing device in the first aspect, in a fifth possible implementation of the fire extinguishing device in the first aspect, further comprising:

[0023] a flow direction switching assembly for closing the injection port;

[0024] The number of the injection ports is N, where N is an integer greater than or equal to 1;

[0025] The N nozzles correspond to different potential fire source areas respectively;

[0026] When a fire occurs in the potential fire source area, the flow direction switching component closes the injection port corresponding to the potential fire source area where no fire occurs.

[0027] In combination with the fifth possible implementation of the fire extinguishing device of the first aspect, in a sixth possible implementation of the fire extinguishing device of the first aspect, the flow direction switching assembly includes a switching drive member, a transmission rod group, N sensing probes, and N-1 closed doors;

[0028] One end of the transmission rod group is connected to the switching drive member, and the other end is connected to N-1 closed doors;

[0029] N sensing probes are connected to the switching drive component;

[0030] The N sensing probes are respectively arranged at the outer ends of the N injection ports.

[0031] In combination with the fire extinguishing device provided in the first aspect, the first possible implementation of the fire extinguishing device in the first aspect, the second possible implementation of the fire extinguishing device in the first aspect, or the third possible implementation of the fire extinguishing device in the first aspect, a seventh possible implementation of the fire extinguishing device in the first aspect further includes:

[0032] A mounting assembly for fixing the housing.

[0033] In combination with the seventh possible implementation of the fire extinguishing device of the first aspect, in an eighth possible implementation of the fire extinguishing device of the first aspect, the mounting assembly includes an adhesive member and a magnetic member;

[0034] The outer wall of the shell is provided with a first mounting groove and a second mounting groove;

[0035] The adhesive component is arranged in the first installation slot, and the magnetic component is arranged in the second installation slot.

[0036] A second aspect of the present invention provides a switch cabinet, comprising:

[0037] Any possible fire extinguishing device provided by the first aspect.

[0038] It can be seen from the above technical solutions that the present invention has the following advantages:

[0039] The fire extinguishing device provided by the present invention comprises a housing, a fire extinguishing element, and a trigger assembly. The housing defines a receiving chamber and a spray port, the spray port communicating with the receiving chamber. The fire extinguishing element is disposed within the receiving chamber. The fire extinguishing element is a solid composed of a first fire extinguishing medium and a second fire extinguishing medium, the first fire extinguishing medium being used to extinguish open flames, and the second fire extinguishing medium being used to reduce the temperature of the fire source. When the fire extinguishing element is heated, it transforms from a solid into a gas. The trigger assembly includes a connected fire sensor and a heating element. When the fire sensor senses a fire, the heating element heats the fire extinguishing element. When the fire sensor detects a fire, the heating element activates, heating the fire extinguishing element. The heat transforms the fire extinguishing element from a solid into a gas. High-pressure gas continuously accumulates in the receiving chamber and is eventually ejected toward the fire area through the spray port. Ions in the high-pressure gas enter the flame and react. The ions freely attach to oxygen ions, hydrogen ions, and hydroxide ions, removing these ions from the flame and extinguishing the flame. The products generated during the flame extinguishing process are gaseous and will not adhere to electrical equipment, thus not affecting its repair and cleaning.

[0040] At the same time, the second fire extinguishing medium in the fire extinguishing body can reduce the temperature of the fire source, eliminate the hidden danger of secondary fire, and has strong fire extinguishing ability.

[0041] In addition, the fire extinguishing process will not consume the oxygen in the surrounding environment, and the chemical composition of the smoke gas generated in the process will not cause harm to human health and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A schematic structural diagram of a fire extinguishing device provided in an embodiment of the present invention;

[0044] Figure 2 A cross-sectional view of a fire extinguishing device provided by an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of the partial structure of a fire extinguishing device provided in an embodiment of the present invention;

[0046] Description of reference numerals:

[0047] 10, housing 11, injection port 20, mounting assembly

[0048] 21. Adhesive component 22. Magnetic component 30. Trigger component

[0049] 31. Heating wire 40, fire extinguishing element 50, first cooling element

[0050] 60, second cooling body 70, flow direction switching component 71, switching drive

[0051] 72. Transmission rod assembly 73. Closed door. DETAILED DESCRIPTION

[0052] The embodiments of the present invention provide a fire extinguishing device and a switch cabinet, which are used to solve the technical problem that in the prior art, traditional fire extinguishing devices are used to extinguish fires in electrical equipment. Residues generated during the fire extinguishing process will adhere to the electrical equipment, affecting the repair and cleaning of the electrical equipment.

[0053] In order to make the purposes, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0054] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0055] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0056] Traditional fire extinguishers, such as dry powder and foam extinguishers, are not only bulky and space-consuming, but also produce a large amount of residue that adheres to electrical equipment during the extinguishing process, hindering switchgear repair and cleaning. Furthermore, these traditional extinguishers can only extinguish open flames but cannot effectively reduce the temperature of the fire source, rendering them unable to eliminate the potential for secondary fires.

[0057] See also Figure 1-3 , an embodiment of the present invention provides a fire extinguishing device, comprising:

[0058] The shell 10, the fire extinguishing body 40 and the trigger assembly 30; the shell 10 is provided with a receiving chamber and an injection port 11, and the injection port 11 is connected to the receiving chamber; the fire extinguishing body 40 is arranged in the receiving chamber; the fire extinguishing body 40 is made of a solid composed of a first fire extinguishing medium and a second fire extinguishing medium, the first fire extinguishing medium is used to extinguish an open flame, and the second fire extinguishing medium is used to reduce the temperature of the fire source; when the fire extinguishing body 40 is heated, it will be converted from a solid into a gas; the trigger assembly 30 includes a connected fire sensor and a heating element, and when the fire sensor senses a fire, the heating element heats the fire extinguishing body 40.

[0059] It should be noted that:

[0060] The shell 10 is used to fix and install other components, and its specific structure is not limited. The accommodating cavity thereon is used to place the fire extinguishing body 40 and provide space for the temporary residence of the gas. The injection port 11 thereon is used to eject the gas converted from the fire extinguishing body 40. The shapes of the accommodating cavity and the injection port 11 are not specifically limited.

[0061] The fire extinguishing body 40 is used to extinguish the flame and reduce the temperature of the fire source. It is a solid formed by a compounding method of the first fire extinguishing medium and the second fire extinguishing medium. After being heated, it will be converted from a solid into a gas. The generated gas now accumulates in the accommodating chamber and is ejected from the injection port 11 when a certain pressure is reached.

[0062] The fire sensor is used to monitor whether a fire has occurred. If so, it sends an operating signal to the heating element. Upon receiving the operating signal, the heating element starts heating the fire extinguishing element 40. If not, it continues monitoring. The heating element is used to heat the fire extinguishing element 40 to convert it from a solid to a gas.

[0063] The heating element is arranged in the accommodating cavity and can be directly connected to the fire extinguishing body 40 to directly heat the fire extinguishing body 40; it can also be arranged at a distance from the fire extinguishing body 40. The heating element heats the gas in the accommodating cavity and transfers heat to the fire extinguishing body 40 through the gas to achieve heating of the fire extinguishing body 40. In this way, the fire extinguishing body 40 can be heated more evenly.

[0064] The beneficial effects of this embodiment include:

[0065] ① When the fire sensor detects a fire, the heating element activates, heating the extinguishing element 40. This heats the extinguishing element 40, transforming it from a solid into a gas. The high-pressure gas, which accumulates in the chamber, is eventually ejected through the nozzle 11 toward the fire area. Ions in the high-pressure gas enter the flame and react with it. The ions freely attach to oxygen, hydrogen, and hydroxide ions, removing them from the flame and extinguishing it. The products generated during the flame extinguishing process are gaseous and will not adhere to electrical equipment, thus preventing any impact on its repair or cleaning.

[0066] ② The second fire extinguishing medium in the fire extinguishing body 40 can reduce the temperature of the fire source, eliminate the hidden danger of secondary re-ignition, and has a strong fire extinguishing ability.

[0067] ③ The fire extinguishing process will not consume the oxygen in the surrounding environment, and the chemical composition of the smoke gas generated in the process will not cause harm to human health and safety.

[0068] ④ By setting up a smaller accommodating cavity, when the solid fire extinguishing body 40 is heated and continuously vaporized, when the pressure of the converted gas rises to a certain value, it can automatically be ejected from the injection port 11 toward the flame. Compared with traditional fire extinguishing devices, the backup pressure or boosting equipment is eliminated, which not only simplifies the structure of the fire extinguishing device, but also reduces the manufacturing and use costs.

[0069] For ease of description and understanding, the following description assumes that the fire extinguishing device is installed in a switch cabinet. However, it should be understood that this does not mean that the fire extinguishing device is only applicable to switch cabinets. It can be applied to any electrical equipment that requires fire extinguishing.

[0070] In a preferred embodiment of the fire extinguishing element 40, the first fire extinguishing medium is aerogel, and the second fire extinguishing medium is perfluorohexanone. A predetermined ratio of aerogel and perfluorohexanone is compounded to form a solid of the desired shape. The aerogel, upon heating, converts to a gaseous state to extinguish open flames, while the perfluorohexanone, upon heating, converts to a gaseous state to reduce the temperature of the fire source, thereby eliminating the potential for secondary fires and providing enhanced fire extinguishing capabilities.

[0071] Alternatively, the mass ratio of aerogel to perfluorohexanone in the fire extinguishing element 40 can be 65%:35%; or 74%:26%. In practical applications, by adjusting the mass ratio of aerogel to perfluorohexanone, fire extinguishing elements 40 with varying fire extinguishing and cooling capabilities can be obtained. This can meet the needs of various fire scenarios, such as distribution boxes, battery compartments, and vehicle engine compartments, broadening the application range and enhancing the versatility of the fire extinguishing device.

[0072] Exemplarily, the fire extinguishing body 40 is a spherical structure made of aerogel and perfluorohexanone, and the mass ratio of aerogel to perfluorohexanone is 65%:35%.

[0073] A preferred embodiment of the trigger assembly 30 includes: a fire sensor that is a temperature sensor; a heating element that includes a connected power supply and a heating wire 31, with the heating wire 31 disposed in the accommodating chamber; and a temperature sensor disposed in the housing 10 and connected to the power supply. The temperature sensor can accurately sense temperature changes in the electrical equipment within the switchgear cabinet, thereby determining whether a fire has occurred. Upon determining that the temperature has suddenly and abnormally risen, a feedback signal is sent to the power supply. Upon receiving the feedback signal, the power supply energizes the heating wire 31, which rapidly generates a high temperature, heating the fire extinguishing element 40 and causing it to transform from a solid state to a gaseous state. High-pressure gas accumulates in the accommodating chamber and is then ejected toward the ignition point through the ejection port 11, extinguishing the flame and reducing the temperature of the fire source.

[0074] Exemplarily: the heating wire 31 is a spiral disc structure, which is arranged at the bottom of the accommodating cavity, opposite to the fire extinguishing body 40; the power supply is a micro power supply, which is connected to the heating wire 31 and the temperature sensor through wires.

[0075] Optimized: The fire extinguishing device is also provided with a cooling component for cooling the fire extinguishing body 40; the cooling component is provided in the accommodating cavity and is connected to the fire extinguishing body 40. Under normal circumstances, the configuration of the fire extinguishing body 40 enables the fire extinguishing device to have the ability to be reused at least twice. When the flame is completely extinguished in the first fire extinguishing process, the temperature sensor senses that the external ambient temperature has dropped to a normal value, and sends a feedback signal to the power supply. The power supply stops supplying power to the heating wire 31, and the heating wire 31 stops heating. However, in order to prevent the fire extinguishing body 40 from continuously generating high-pressure gas under the action of residual temperature, which causes wasteful injection, a cooling component is added to cool the fire extinguishing body 40 so that the temperature of the fire extinguishing body 40 can drop rapidly, thereby avoiding unnecessary continuous consumption of the fire extinguishing body 40.

[0076] Exemplarily: the cooling component includes a first cooling body 50 and a second cooling body 60, which are arranged in the accommodating cavity at intervals to form a cooling chamber, and the fire extinguishing body 40 is arranged in the cooling chamber; the first cooling body 50 and the second cooling body 60 are circular plate structures made of materials such as asbestos and foamed polyurethane. Such materials have poor thermal conductivity and the temperature rise is not obvious under heating conditions.

[0077] Optionally, a cooling medium flow channel can be set in the first cooling body 50 and the second cooling body 60. After the first fire extinguishing is completed, the cooling medium is introduced into the first cooling body 50 and the second cooling body 60 through the cooling medium flow channel. The flowing cooling medium will perform rapid and continuous heat exchange with the fire extinguishing body 40, take away the heat of the fire extinguishing body 40, and quickly reduce the temperature of the fire extinguishing body 40. The cooling medium can be cold water or cold oil. In order to improve the heat exchange efficiency, the first cooling body 50 and the second cooling body 60 can be made of materials with better thermal conductivity, so that the heat of the fire extinguishing body 40 can be quickly transferred to the cooling medium.

[0078] Optimized: The fire extinguishing device is also provided with a flow direction switching component 70 for closing the injection port 11; the number of the injection ports 11 is N, where N is an integer greater than or equal to 1; the N injection ports 11 correspond to different potential fire source areas respectively; when a fire occurs in a potential fire source area, the flow direction switching component 70 closes the injection port 11 corresponding to the potential fire source area where no fire has occurred, that is, the flow direction switching component 70 ensures that only the injection port 11 corresponding to the fire area is in an open state, and can spray out high-pressure fire extinguishing gas to achieve the effect of precise fire extinguishing. In practice, a variety of electrical equipment, such as cable rooms, battery rooms, and low-voltage meter boxes, are installed within a switchgear cabinet. These electrical equipment are typically installed at different locations within the cabinet, such as at different heights and horizontal positions within the cabinet. Therefore, by designing at least two injection ports 11 on the housing 10, when a fire occurs in electrical equipment at different locations, the flow direction switching assembly 70 can be used to close the injection ports 11 corresponding to the electrical equipment not on fire, and open the injection ports 11 corresponding to the electrical equipment on fire, allowing the high-pressure gas accumulated in the accommodating chamber to be ejected to extinguish the fire. Thus, because the flow direction switching assembly 70 has the ability to switch multiple injection ports 11 on and off, a single fire extinguishing device can be equipped to extinguish fires at different locations, further enhancing its performance.

[0079] For example, the housing 10 is provided with two injection ports 11; the flow direction switching assembly 70 includes a switching driver 71, a transmission rod assembly 72, two sensing probes, and a closed door 73; one end of the transmission rod assembly 72 is connected to the switching driver 71, and the other end is connected to the closed door 73; the two sensing probes are connected to the switching driver 71 for signal transmission; and the two sensing probes are respectively located at the outer ends of the two injection ports 11. The sensing probes can sense in real time whether a fire has occurred in the electrical equipment corresponding to the corresponding injection port 11, thereby feeding back a signal to the switching driver 71. The switching driver 71 drives the transmission rod assembly 72 to drive the closed door 73 to close the injection port 11 where the sensing probe detected the fire, leaving the injection port 11 where the sensing probe detected the fire open, thereby achieving targeted and precise injection of high-pressure fire extinguishing gas.

[0080] Optimized: The fire extinguishing device is further provided with a mounting assembly 20 for fixing the housing 10. The fire extinguishing device is fixed in the switch cabinet by the mounting assembly 20, and ensures that the injection port 11 corresponds to the electrical equipment where a fire may occur.

[0081] Exemplary: the installation component 20 includes an adhesive 21 and a magnetic component 22; the shell 10 is a cylindrical shell 10, which encloses a cylindrical space, and the injection port 11 is opened on the peripheral wall of the shell 10, and the injection port 11 radially penetrates the peripheral wall of the shell 10, and a first installation groove and a second installation groove are opened on the top wall of the shell 10; the adhesive 21 is arranged in the first installation groove, and the magnetic component 22 is arranged in the second installation groove; the adhesive component 21 adopts tape or rubber plate, and can be quickly and firmly bonded and fixed to the inner wall of the cabinet through bonding force; the magnetic component 22 is a magnet, which is magnetically fixed to the inner wall of the cabinet by the magnet, and the bonding force of the adhesive 21 is superimposed, which can further improve the installation stability of the fire extinguishing device.

[0082] Example 2

[0083] A switch cabinet provided in an embodiment of the present invention includes a fire extinguishing device. The specific structure of the fire extinguishing device refers to Example 1. Since the switch cabinet adopts all the technical solutions in Example 1, it has at least the beneficial effects brought by the technical solutions in Example 1, which will not be described in detail here.

[0084] The switch cabinet can be any one of the following: a distribution box, a switch cabinet, a battery compartment, an engine compartment, a charging pile, a distribution cabinet, a car engine compartment, a battery compartment, a machine room, a mobile energy storage cabinet, etc.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fire extinguishing device, characterized in that: include: Housing, extinguishing body and trigger assembly; The housing is provided with a receiving cavity and an injection port, and the injection port is communicated with the receiving cavity; The fire extinguishing body is arranged in the accommodating cavity; The fire extinguishing body is a solid made of a first fire extinguishing medium and a second fire extinguishing medium, wherein the first fire extinguishing medium is used to extinguish an open flame, and the second fire extinguishing medium is used to reduce the temperature of the fire source; When the fire extinguishing body is heated, it will be transformed from solid to gas; The trigger assembly includes a fire sensor and a heating element connected to each other, and when the fire sensor senses a fire, the heating element heats the fire extinguishing body; Also includes: a flow direction switching assembly for closing the injection port; The number of the injection ports is N, where N is an integer greater than or equal to 1; The N injection ports correspond to different potential fire source areas respectively; When a fire occurs in the potential fire source area, the flow direction switching component closes the injection port corresponding to the potential fire source area where no fire occurs; The flow direction switching assembly includes a switching drive member, a transmission rod group, N sensing probes and N-1 closed doors; One end of the transmission rod group is connected to the switching drive member, and the other end is connected to N-1 closed doors; N of the sensing probes are connected to the switching drive member; N sensing probes are respectively arranged at the outer ends of the N injection ports; The first fire extinguishing medium is aerogel; The second fire extinguishing medium is perfluorohexanone.

2. A fire extinguishing device according to claim 1, characterized in that: The mass ratio of the aerogel and the perfluorohexanone constituting the fire extinguishing body is 65%:35%; or The mass ratio of the aerogel and the perfluorohexanone constituting the fire extinguishing body is 74%:26%.

3. A fire extinguishing device according to claim 1, characterized in that: The fire sensor is a temperature sensor; The heating element includes a power supply and a heating wire connected to each other, and the heating wire is arranged in the accommodating cavity; The temperature sensor is arranged on the shell and connected to the power supply.

4. A fire extinguishing device according to any one of claims 1 to 3, characterized in that: Also includes: A cooling component for cooling the fire extinguishing body; The cooling component is arranged in the accommodating cavity and connected to the fire extinguishing body.

5. A fire extinguishing device according to any one of claims 1 to 3, characterized in that: Also includes: A mounting assembly is used to fix the housing.

6. A fire extinguishing device according to claim 5, characterized in that: The mounting assembly includes an adhesive component and a magnetic component; The outer wall of the shell is provided with a first mounting groove and a second mounting groove; The adhesive component is arranged in the first installation slot, and the magnetic component is arranged in the second installation slot.

7. A switch cabinet, characterized in that: include: A fire extinguishing device according to any one of claims 1 to 6.

Images