Temperature-sensitive self-starting perfluorohexanone fire extinguishing device

Abstract

The application relates to the technical field of fire safety, and discloses a temperature-sensing self-starting perfluorohexanone fire extinguishing device which comprises a water guide box and a water collecting tank, a first cavity for storing fire extinguishing medium is arranged in the water guide box, a liquid outlet is arranged at the bottom of the first cavity, a second cavity is arranged in the water collecting tank, and a liquid injection hole is arranged in the side wall of the second cavity; the temperature-sensing assembly comprises a cylinder, a sliding piece, a reset spring and a convex valve; the cylinder is installed at the bottom of the water collecting tank and extends in the vertical direction; the sliding piece is slidably arranged in the cylinder, and a temperature-sensing medium is filled in a lower chamber; the convex valve is arranged in the second cavity of the water collecting tank, a water stop plug for plugging the liquid outlet is arranged at the top of the convex valve; one end of the sliding piece penetrates through the top of an upper chamber and the bottom of the second cavity in sequence and is fixedly connected with the convex valve, the reset spring is sleeved with the outer wall of the sliding piece and is used for applying a pre-tightening force in the vertical downward direction to the convex valve, so that the temperature-sensing release of the fire extinguishing medium is realized.

Description

Technical Field

[0001] This invention relates to the field of fire safety technology, and in particular to a temperature-sensitive, self-starting perfluorohexanone fire extinguishing device. Background Technology

[0002] In the fields of power, communications, and energy storage, electrical cabinets, control cabinets, battery packs, and other equipment have small internal spaces, dense electronic components, and complex wiring layouts, posing a risk of fire due to overload, short circuit, poor contact, thermal runaway, and other reasons. Since such equipment is usually unattended or minimally attended to, and the internal space is enclosed with poor heat dissipation, a fire can easily cause serious consequences such as equipment damage, power outages, and even casualties. Therefore, reliable automatic fire extinguishing devices need to be installed inside such equipment.

[0003] Currently, the following types of fire extinguishing devices are mainly used for such scenarios: Fire detection tube type fire extinguishing devices, which mainly use a pressurized fire detection tube as both a fire detection element and a fire extinguishing agent release pipeline. When the fire detection tube bursts due to heat, the pressure inside the tube drops sharply, triggering the container valve to open and release the fire extinguishing agent. However, this device has the following shortcomings: the fire detection tube itself is expensive, the process of laying the tube inside the cabinet is complex and difficult to construct, and the fire detection tube is in a pressurized state for a long time, making it susceptible to damage from external forces such as vibration and compression, leading to false triggering or failure; Electrically controlled fire extinguishing devices, which mainly use electronic components such as temperature sensors and smoke sensors to detect the fire, and the controller then activates the electric initiator to drive the release of the fire extinguishing agent. These devices heavily rely on external power sources or built-in batteries during use. When a fire causes a power outage or the battery is depleted, the device will not function properly. At the same time, the electronic components are not reliable enough in harsh environments such as high temperature, high humidity, and strong electromagnetic interference, and there is a risk that the power source will fail and the fire extinguishing will fail. Non-pressurized gas-generating drive devices mainly use the gas-generating agent to instantly burn and generate a large amount of gas when started, which pushes the piston to spray the fire extinguishing agent from the container. These devices have extremely high requirements for matching the amount of gas-generating agent with the volume of the gas-generating chamber. If the matching is not proper, problems such as insufficient driving force or pressure overshoot may occur. In addition, the gas-generating agent is a chemical agent, which is prone to moisture absorption and clumping during long-term storage and will become ineffective. Moreover, the gas generation process is an uncontrollable rapid exothermic reaction, and the pressure control precision is insufficient, making it difficult to ensure the uniformity and reliability of the extinguishing agent spray. Existing fire extinguishing devices generally suffer from high cost, complex deployment, dependence on external energy sources, insufficient reliability, and poor environmental adaptability when used in confined spaces. They are difficult to meet the comprehensive requirements of high reliability, high adaptability, and low maintenance cost for fire extinguishing devices in scenarios such as electrical cabinets, control cabinets, and battery packs. Summary of the Invention

[0004] The purpose of this invention is to provide a temperature-sensitive, self-starting perfluorohexanone fire extinguishing device. By adopting a purely mechanical structure, it does not rely on any external power source or battery, and avoids the risks of failure such as aging of electronic components, signal interference, and battery depletion. It can still work reliably in environments with strong electromagnetic interference. It has a simple structure and low cost.

[0005] To achieve the above objectives, the present invention provides a temperature-sensitive, self-activating perfluorohexanone fire extinguishing device, comprising a storage component and a temperature-sensing component; the storage component includes a water guide box and a water collection tank connected vertically from top to bottom, the water guide box having a first cavity for storing the extinguishing medium, the bottom of the first cavity having a liquid outlet, and the water collection tank having a second cavity, the side wall of the second cavity having a spray hole; the temperature-sensing component includes a cylinder, a sliding member, a return spring, and a convex valve; the cylinder is installed at the bottom of the water collection tank and extends vertically; the sliding member is slidably disposed within the cylinder and divides the cylinder cavity into an upper chamber and a lower chamber, the lower chamber being filled with The container is filled with a temperature-sensitive medium; the convex valve is disposed in the second cavity of the water collection tank, and the top of the convex valve is provided with a water-proof plug for sealing the liquid outlet; one end of the sliding member passes through the top of the upper chamber and the bottom of the second cavity in sequence and is fixedly connected to the convex valve; the return spring is sleeved on the outer wall of the sliding member and is used to apply a pre-tightening force vertically downward to the convex valve; wherein, when the ambient temperature reaches a preset threshold, the temperature-sensitive medium expands due to heat, pushing the sliding member upward, overcoming the elastic force of the return spring and driving the convex valve upward, causing the water-proof plug to disengage from the liquid outlet, and the fire extinguishing medium in the first cavity flows into the second cavity through the liquid outlet and is sprayed out from the spray hole.

[0006] Furthermore, the extinguishing medium is perfluorohexanone, and the temperature-sensing medium is a gas with a high expansion coefficient, specifically helium.

[0007] In one embodiment, the convex valve has a hollow structure and includes a first column and a second column arranged vertically from top to bottom. One end of the first column is fixedly connected to the water-blocking plug, and the other end is connected to the second column. The end of the second column opposite to the first column is connected to the reset spring, and the end of the reset spring opposite to the second column is connected to the bottom inner wall of the second cavity.

[0008] In one embodiment, a waterproof sleeve is connected to the bottom of the second column. One end of the waterproof sleeve facing away from the second column is connected to the bottom inner wall of the second cavity. The waterproof sleeve is fitted over the outside of the reset spring and isolates the reset spring from the second cavity.

[0009] In one embodiment, the outer diameter of the first column is smaller than the outer diameter of the second column, and both the outer surfaces of the first column and the second column are provided with multiple through holes.

[0010] In one embodiment, the temperature sensing component further includes a first heat-conducting fin and a second heat-conducting fin, the first heat-conducting fin being disposed at the bottom of the cylinder, and the second heat-conducting fin being disposed circumferentially on the outer side of the cylinder.

[0011] In one embodiment, the sliding member includes a pneumatic piston and a rod disposed in the upper chamber. The pneumatic piston is slidably disposed inside the cylinder, and the outer edge of the pneumatic piston abuts against the inner wall of the cylinder. One end of the rod is connected to the pneumatic piston, and the other end extends vertically into the second chamber and is connected to the convex valve.

[0012] In one embodiment, the temperature sensing component further includes a heat collection cover, one end of which is connected to the water collection tank, and the other end is sleeved on the outer periphery of the cylinder. The outer diameter of the heat collection cover increases vertically from top to bottom.

[0013] In one embodiment, the storage component further includes a water supply pipe disposed above the water guide box, one end of the water supply pipe communicating with the first cavity and the other end connected to a central water supply system.

[0014] In one embodiment, the storage component further includes a plurality of water distribution pipes, the number of which is the same as the number of spray holes. One end of each water distribution pipe is connected to the second cavity through the spray holes, and the other end extends to the outside of the second cavity.

[0015] In one embodiment, multiple fire sprinklers are fixedly installed on the outer side of each water distribution pipe.

[0016] Compared with the prior art, the beneficial effects of the temperature-sensing self-starting perfluorohexanone fire extinguishing device of this invention are as follows: The thermal expansion of the temperature-sensing medium directly drives the sliding component, which in turn opens the convex valve to release the extinguishing medium. The entire triggering process is based entirely on mechanical force transmission, requiring no external power supply or battery power. This fundamentally eliminates common risks such as aging and failure of electronic components, false triggering due to signal interference, and failure to start due to battery depletion. When the ambient temperature reaches a preset threshold, the temperature-sensing medium in the lower chamber rapidly heats and expands, pushing the sliding component upward and overcoming the preload of the return spring. This causes the convex valve to move upward, disengaging the water-stop plug from the outlet. Under the influence of gravity, the extinguishing medium flows into the second chamber through the outlet and is sprayed out from the spray hole. This process requires no manual intervention and can automatically initiate fire extinguishing in the early stages of a fire, effectively suppressing the spread of fire and buying valuable emergency response time. Under normal conditions, the water-stop plug on the top of the convex valve tightly seals the outlet, and the return spring continuously applies a vertical downward preload to ensure that the water-stop plug will not detach from the outlet due to external disturbances such as vibration or impact when not triggered, effectively preventing accidental release and daily leakage of the extinguishing medium. When the temperature drops and the temperature-sensing medium contracts, the return spring pushes the sliding part and the convex valve to reset, the water-stop plug re-seals the outlet, and the device automatically returns to standby mode, enabling repeated use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the temperature-sensing self-starting perfluorohexanone fire extinguishing device according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the temperature-sensing self-starting perfluorohexanone fire extinguishing device according to another embodiment of the present invention; Figure 3 This is a front view of the temperature-sensing self-starting perfluorohexanone fire extinguishing device according to an embodiment of the present invention; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a cross-sectional view of the temperature-sensing self-starting perfluorohexanone fire extinguishing device according to an embodiment of the present invention; Figure 6 yes Figure 5 Enlarged view of point B in the middle; Figure 7 yes Figure 6 Enlarged view of point C in the middle; In the diagram, 1 is the storage component; 11 is the water collection tank; 111 is the second chamber; 12 is the water guide box; 121 is the first chamber; 122 is the liquid outlet; 13 is the water supply pipe; 14 is the water distribution pipe; and 15 is the fire sprinkler head. 2. Temperature sensing component; 21. Cylinder; 211. Upper chamber; 212. Lower chamber; 22. Sliding component; 221. Pneumatic piston; 222. Rod; 23. Return spring; 24. Convex valve; 241. First column; 242. Second column; 243. Through hole; 25. Water-proof plug; 26. Water-proof sleeve; 27. First heat-conducting fin; 28. Second heat-conducting fin; 3. Heat collection cover. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0019] In the description of this invention, it should be understood that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to that other element. The terms "mounted," "connected," and "attached" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements or an interaction between two elements. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] In the description of this invention, it should be understood that the terms "height," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this invention to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0022] like Figures 1 to 7As shown, a preferred embodiment of the present invention provides a temperature-sensitive self-starting perfluorohexanone fire extinguishing device, which includes a storage component 1 and a temperature-sensing component 2. The storage component 1 includes a water guide box 12 and a water collection tank 11 connected vertically from top to bottom. The water guide box 12 has a first cavity 121 for storing the fire extinguishing medium inside, and the bottom of the first cavity 121 has a liquid outlet. The water collection tank 11 has a second cavity 111 inside, and the side wall of the second cavity 111 has a spray hole. The temperature-sensing component 2 includes a cylinder 21, a sliding member 22, a return spring 23, and a convex valve 24. The cylinder 21 is installed at the bottom of the water collection tank 11 and extends vertically. The sliding member 22 is slidably disposed inside the cylinder 21 and divides the inner cavity of the cylinder 21 into an upper chamber. The lower chamber is filled with a temperature-sensitive medium. A convex valve 24 is located in the second chamber 111 of the water collection tank 11. A water-blocking plug 25 for sealing the liquid outlet is provided on the top of the convex valve 24. One end of the sliding member 22 passes through the top of the upper chamber and the bottom of the second chamber 111 and is fixedly connected to the convex valve 24. A return spring 23 is sleeved on the outer wall of the sliding member 22 and is used to apply a pre-tightening force vertically downward to the convex valve 24. When the ambient temperature reaches a preset threshold, the temperature-sensitive medium expands due to heat, pushing the sliding member 22 upward, overcoming the elastic force of the return spring 23 and driving the convex valve 24 upward, causing the water-blocking plug 25 to disengage from the liquid outlet. The extinguishing medium in the first chamber 121 flows into the second chamber 111 through the liquid outlet and is sprayed out from the spray hole.

[0023] Based on the above technical features, this embodiment of the invention directly drives the sliding member 22 to move through the thermal expansion of the temperature-sensing medium, thereby causing the convex valve 24 to open and release the extinguishing medium. The entire triggering process is based entirely on mechanical force transmission, requiring no external power supply or battery power, fundamentally eliminating common risks such as aging and failure of electronic components, false triggering due to signal interference, and failure to start due to battery depletion. When the ambient temperature reaches a preset threshold, the temperature-sensing medium in the lower chamber rapidly heats and expands, pushing the sliding member 22 upward and overcoming the preload force of the return spring 23, causing the convex valve 24 to move upward and causing the water-stop plug 25 to disengage from the outlet. Under the action of gravity, the extinguishing medium flows into the second chamber 111 through the outlet and from the outlet. The spray nozzle emits liquid without human intervention, automatically activating fire extinguishing in the early stages of a fire, effectively suppressing the spread of fire and buying valuable emergency response time. Under normal conditions, the water-stop plug 25 on top of the convex valve 24 tightly seals the outlet. The return spring 23 continuously applies a downward preload, ensuring that the water-stop plug 25 will not detach from the outlet due to vibration, impact, or other external disturbances when not triggered, effectively preventing accidental release and daily leakage of the extinguishing medium. When the temperature drops and the temperature-sensing medium contracts, the return spring 23 pushes the sliding member 22 and the convex valve 24 to reset, the water-stop plug 25 re-seals the outlet, and the device automatically returns to standby mode, possessing reusability.

[0024] Furthermore, the extinguishing medium is perfluorohexanone, and the heat-sensing medium is a gas with a high expansion coefficient, specifically helium. Perfluorohexanone is an important fluorinated ketone compound, which is a colorless, odorless, and transparent liquid at room temperature and pressure. The following is a detailed introduction to perfluorohexanone: Perfluorohexanone extinguishes fires by absorbing heat and inhibiting the flame chain reaction, making it suitable for extinguishing Class A (solid), Class B (liquid), Class C (gas), and electrical fires, with high extinguishing efficiency. Helium, as a monatomic gas, has an expansion coefficient close to that of an ideal gas, similar to that of hydrogen under specific conditions. Moreover, because helium is an inert gas, it will not deflagrate at high temperatures like hydrogen, and its chemical stability makes the heat-sensing component 2 durable.

[0025] As some embodiments of the present invention, such as Figures 3 to 4 As shown, the convex valve 24 has a hollow structure. The convex valve 24 includes a first column 241 and a second column 242 arranged vertically from top to bottom. One end of the first column 241 is fixedly connected to the water-blocking plug 25, and the other end is connected to the second column 242. The end of the second column 242 facing away from the first column 241 is connected to the return spring 23. The end of the return spring 23 facing away from the second column 242 is connected to the bottom inner wall of the second cavity 111. The convex valve 24 has a hollow structure, which effectively reduces its own weight and the inertia that the sliding member 22 needs to overcome when moving upward, making the response of the temperature-sensing medium to push the sliding member 22 more sensitive and shortening the action time from temperature triggering to the water-proof plug 25 disengaging from the liquid outlet. On the other hand, the hollow inner cavity can serve as an auxiliary flow channel for the extinguishing medium. When the water-proof plug 25 disengages from the liquid outlet, the extinguishing medium in the first cavity 121 can be directly introduced into the second cavity 111 through the hollow inner cavity of the convex valve 24, reducing the path bends and resistance losses of the medium flow and improving the spray flow rate and extinguishing efficiency. The convex valve 24 is vertically divided into a first column 241 and a second column 242. The first column 241 is dedicated to being fixedly connected to the water-proof plug 25 and undertaking the sealing function of the liquid outlet. The second column 242 is dedicated to cooperating with the return spring 23 to achieve the elastic return function.

[0026] As some embodiments of the present invention, such as Figures 3 to 4As shown, a water-proof sleeve 26 is connected to the bottom of the second column 242. One end of the water-proof sleeve 26, facing away from the second column 242, is connected to the inner wall of the bottom of the second cavity 111. The water-proof sleeve 26 is fitted over the return spring 23, isolating the return spring 23 from the second cavity 111. Extinguishing media such as perfluorohexanone have certain chemical reactivity. If the return spring 23 is directly exposed to the second cavity 111 for a long time and continuously in contact with the extinguishing media, it may lead to corrosion of the spring surface, attenuation of the elastic coefficient, or even breakage. The water-proof sleeve 26 completely encloses the return spring 23 and isolates it from the internal space of the second cavity 111, preventing the extinguishing media from contacting the spring body. This fundamentally avoids the impact of chemical corrosion on the spring's mechanical properties, ensuring that the return spring 23 maintains a stable preload throughout the entire lifespan of the device, and that the return action is always reliable.

[0027] As some embodiments of the present invention, such as Figures 3 to 4 As shown, the outer diameter of the first column 241 is smaller than that of the second column 242, and multiple through holes 243 are provided on the outer wall surfaces of both the first column 241 and the second column 242. Through the design of the first column 241 and the second column 242, with the outer diameter of the first column 241 being smaller than that of the second column 242, when the temperature-sensing medium pushes the convex valve 24 upward and the water-blocking plug 25 disengages from the outlet, the extinguishing medium in the first cavity 121 can quickly enter the second cavity 111 through the first column 241 and the second column 242. This significantly increases the spray flow rate, shortens the time it takes for the extinguishing medium to reach the protected area, and improves the initial fire extinguishing response speed.

[0028] As some embodiments of the present invention, such as Figure 5 As shown, the temperature sensing component 2 also includes a first heat-conducting fin 27 and a second heat-conducting fin 28. The first heat-conducting fin 27 is disposed at the bottom of the cylinder 21, and the second heat-conducting fin 28 is disposed circumferentially on the outer side of the cylinder 21. Through the design of the first heat-conducting fin 27 and the second heat-conducting fin 28, both are passive heat dissipation structures with expanded surface area. The first heat-conducting fin 27 extends outward from the bottom of the cylinder 21, and the second heat-conducting fin 28 unfolds along the outer circumference of the cylinder 21. Together, they multiply the effective heat exchange area between the cylinder 21 and the temperature-sensing medium. The increase in heat exchange area directly reduces the thermal resistance between the cylinder 21 wall and the temperature-sensing medium, allowing ambient heat to be transferred to the temperature-sensing medium in the lower chamber more quickly. The rate of thermal expansion of the temperature-sensing medium is significantly accelerated, and the response delay from the rise of ambient temperature to the upward movement of the sliding member 22 is greatly shortened. The temperature-sensing start-up speed of the device is significantly better than that of the finless structure.

[0029] As some embodiments of the present invention, such as Figure 5As shown, the sliding member 22 includes a pneumatic piston 221 and a rod 222 disposed in the upper chamber 211. The pneumatic piston 221 is slidably disposed inside the cylinder 21, and the outer edge of the pneumatic piston 221 abuts against the inner wall of the cylinder 21. One end of the rod 222 is connected to the pneumatic piston 221, and the other end extends vertically into the second chamber 111 and is connected to the convex valve 24. Through the design of the pneumatic piston 221 and the rod 222, the pneumatic piston 221 is specifically used to withstand the thrust generated by the expansion of the temperature-sensing medium and to reciprocate within the cylinder 21, while the rod 222 is specifically used to transmit the linear motion of the piston to the convex valve 24 in the second chamber 111. The functions of the two components are clearly separated: the pneumatic piston 221 is responsible for receiving and converting force, while the rod 222 is responsible for transmitting and executing force. This split structure makes the temperature-sensing drive end and the valve control end mechanically independent. The expansion force of the temperature-sensing medium is evenly received by the piston and then precisely transmitted to the convex valve 24 through the rod 222. This avoids the structural complexity and force coupling problems caused by a single component simultaneously undertaking multiple functions such as sealing, guiding, and transmission, thus improving the rationality and reliability of the overall structure. The outer edge of the pneumatic piston 221 always remains in contact with the inner wall of the cylinder 21, forming an interference fit or a tight sliding fit. This strictly divides the inner cavity of the cylinder 21 into an upper chamber and a lower chamber. This structure ensures that when the temperature-sensing medium in the lower chamber expands due to heat, the pressure generated is entirely applied to the bottom of the pneumatic piston 221, pushing the pneumatic piston 221 upward. There is no leakage from the gap between the pneumatic piston 221 and the cylinder wall. The expansion energy of the temperature-sensing medium is efficiently converted into the mechanical thrust of the pneumatic piston 221.

[0030] As some embodiments of the present invention, such as Figures 1 to 2 As shown, the temperature sensing component 2 also includes a heat collection cover 3. One end of the heat collection cover 3 is connected to the water collection tank 11, and the other end is fitted onto the outer periphery of the cylinder 21. The outer diameter of the heat collection cover 3 increases vertically from top to bottom. Through the design of the heat collection cover 3, the outer diameter of the heat collection cover 3 increases vertically from top to bottom, forming a funnel-shaped or conical structure that is narrow at the top and wide at the bottom. This is equivalent to setting up a passive heat collection device around the cylinder 21. After the thermal radiation and convective heat from the environment shines on the outer wall of the heat collection cover 3, it gradually converges downward along the conical surface and is conducted to the wall of the cylinder 21. This makes the heat density received in the bottom area of ​​the cylinder 21 significantly higher than that of the exposed structure without the heat collection cover 3. This structure effectively gathers the dispersed ambient heat to the lower chamber area of ​​the cylinder 21 where the temperature sensing medium is located, greatly improving the heat conduction efficiency, allowing the temperature sensing medium to reach the expansion trigger temperature more quickly, and shortening the temperature sensing response time of the device. The funnel-shaped heat collection cover 3 can prevent the sprayed fire extinguishing medium from contacting the temperature sensing component 2, thereby further extending the service life of the temperature sensing component 2.

[0031] As some embodiments of the present invention, such as Figure 1As shown, the storage component 1 also includes a water supply pipe 13, which is positioned above a water guide box 12. One end of the water supply pipe 13 is connected to the first chamber 121, and the other end is connected to the central water supply system. Through the design of the water supply pipe 13, the first chamber 121 is directly connected to the central water supply system. When the extinguishing medium in the first chamber 121 decreases due to spray consumption or natural evaporation, the central water supply system can automatically replenish the extinguishing medium to the first chamber 121, eliminating the need for regular manual inspection, disassembly, and refilling. This structure allows the device to automatically return to a full liquid state after each fire extinguishing trigger, maintaining a standby capability for immediate restart. This completely solves the pain point of existing pressurized or liquid-storage fire extinguishing devices requiring manual replacement or refilling after a single use to restore functionality, making it particularly suitable for unattended, long-term fire protection scenarios.

[0032] As some embodiments of the present invention, such as Figure 1 As shown, the storage component 1 also includes multiple water distribution pipes 14, the number of which is the same as the number of spray holes. One end of each water distribution pipe 14 is connected to the second cavity 111 through a spray hole, and the other end extends to the outside of the second cavity 111. Through the design of the water distribution pipes 14, each spray hole is equipped with a dedicated water distribution pipe 14, with the number of water distribution pipes 14 corresponding one-to-one with the number of spray holes. This ensures that the extinguishing medium in the second cavity 111 flows out through each spray hole and is then sprayed outwards through an independent water distribution pipe 14 channel. This structure fundamentally eliminates the problem of uneven flow distribution caused by differences in flow channel resistance when multiple spray holes share the same outlet, ensuring consistent medium flow at each spray point. The distribution of the extinguishing medium within the protected space is more uniform, avoiding local over-spraying waste and local under-spraying loss of control, significantly improving the integrity and effectiveness of the fire extinguishing coverage.

[0033] As some embodiments of the present invention, such as Figure 1 As shown, multiple fire sprinklers 15 are fixedly installed on the outer side of each water distribution pipe 14. The installation of multiple fire sprinklers 15 on the outer side of each water distribution pipe 14 increases the number of spray points corresponding to the water distribution pipe 14 from one to multiple. More spray points mean that the extinguishing medium can enter the protected space simultaneously from more directions, effectively eliminating localized coverage gaps caused by insufficient spray points. This allows the extinguishing medium to fill the entire protected space more quickly and comprehensively, significantly shortening the time it takes for the extinguishing medium to reach each area in the early stages of a fire.

[0034] The working process for this application is as follows: This fire extinguishing device needs to be fixedly installed on the indoor ceiling. When a fire occurs, the high-temperature smoke generated by the flames rises continuously because its density is lower than that of room-temperature air, forming a hot smoke layer below the ceiling. Based on the physical property of thermal expansion and contraction of gases, the temperature-sensing medium in the lower chamber 212 undergoes significant volume expansion, generating continuously increasing internal pressure that pushes the sliding member 22 to move vertically upward within the cylinder 21. The mechanical movement of the sliding member 22, in turn, pushes the convex valve 24 to move vertically upward. When the convex valve 24 rises to the designed end point of its stroke, the water-stop plug 25 is completely embedded in the first cavity 12 of the water guide box 12. Inside the first chamber 121, the extinguishing medium stored in the first chamber 121 enters the second chamber 111 of the water collection tank 11 through the convex valve 24, realizing the directional delivery of the extinguishing medium. When the fire is effectively controlled and the ambient temperature drops below the set threshold, the temperature-sensing medium in the lower chamber 212 of the cylinder 21 stops expanding due to the disappearance of the heat source. Under the action of cooling and contraction, a negative pressure is generated. Under the action of the negative pressure and the rebound force of the return spring 23, the sliding member 22 is driven to reset and move downward, thereby driving the convex valve 24 to fall back to the initial position. At this time, the water-blocking plug 25 re-closes the first chamber 121, thereby automatically terminating the continuous supply of the extinguishing medium.

[0035] In summary, the temperature-sensitive self-starting perfluorohexanone fire extinguishing device provided by this invention offers several advantages over existing technologies. Firstly, the thermal expansion of the temperature-sensitive medium directly drives the sliding member 22, thereby opening the convex valve 24 to release the fire extinguishing medium. The entire triggering process is based entirely on mechanical force transmission, requiring no external power supply or battery power. This fundamentally eliminates common risks such as aging and failure of electronic components, signal interference causing false triggering, and battery depletion preventing startup. Secondly, when the ambient temperature reaches a preset threshold, the temperature-sensitive medium in the lower chamber rapidly expands, pushing the sliding member 22 upwards and overcoming the preload of the return spring 23. This causes the convex valve 24 to move upwards, disengaging the water-stop plug 25 from the outlet. The fire extinguishing medium then flows out under gravity. The liquid flows into the second chamber 111 and sprays out from the spray hole. The entire process requires no manual intervention and can automatically start fire extinguishing in the early stage of a fire, effectively suppressing the spread of fire and buying valuable emergency response time. Under normal conditions, the water-stop plug 25 on the top of the convex valve 24 tightly seals the liquid outlet. The return spring 23 continuously applies a vertical downward preload to ensure that the water-stop plug 25 will not detach from the liquid outlet due to external disturbances such as vibration and impact when not triggered, effectively preventing accidental release and daily leakage of the extinguishing medium. When the temperature drops and the temperature-sensing medium contracts, the return spring 23 pushes the sliding part 22 and the convex valve 24 to reset, the water-stop plug 25 re-seals the liquid outlet, and the device automatically returns to standby mode, with reusability.

[0036] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A temperature-sensitive, self-activating perfluorohexanone fire extinguishing device, characterized in that, include: Storage components and temperature sensing components; The storage component includes a water guide box and a water collection tank connected vertically from top to bottom. The water guide box has a first cavity for storing fire extinguishing medium inside, and the bottom of the first cavity has a liquid outlet. The water collection tank has a second cavity inside, and the side wall of the second cavity has a spray hole. The temperature sensing component includes a cylinder, a sliding component, a return spring, and a convex valve. The cylinder is installed at the bottom of the water collection tank and extends vertically. The sliding member is slidably disposed inside the cylinder and divides the cylinder cavity into an upper chamber and a lower chamber, the lower chamber being filled with a temperature-sensing medium; The convex valve is disposed in the second cavity of the water collection tank, and the top of the convex valve is provided with a water-proof plug for sealing the liquid outlet; One end of the sliding member passes through the top of the upper chamber and the bottom of the second chamber in sequence and is fixedly connected to the convex valve. The return spring is sleeved on the outer wall of the sliding member and is used to apply a preload force downward in a vertical direction to the convex valve. When the ambient temperature reaches a preset threshold, the temperature-sensing medium expands due to heat, pushing the sliding member upward. This overcomes the elastic force of the reset spring and causes the convex valve to move upward, causing the water-proof plug to detach from the liquid outlet. The fire extinguishing medium in the first cavity flows into the second cavity through the liquid outlet and is sprayed out from the spray hole.

2. The temperature-sensing, self-starting perfluorohexanone fire extinguishing device according to claim 1, characterized in that, The convex valve has a hollow structure and includes a first column and a second column arranged vertically from top to bottom. One end of the first column is fixedly connected to the water-blocking plug, and the other end is connected to the second column. The end of the second column opposite to the first column is connected to the return spring, and the end of the return spring opposite to the second column is connected to the bottom inner wall of the second cavity.

3. The temperature-sensing, self-starting perfluorohexanone fire extinguishing device according to claim 2, characterized in that, The bottom of the second column is connected to a waterproof sleeve. One end of the waterproof sleeve away from the second column is connected to the bottom inner wall of the second cavity. The waterproof sleeve is fitted over the outside of the reset spring and isolates the reset spring from the second cavity.

4. The temperature-sensing, self-starting perfluorohexanone fire extinguishing device according to claim 3, characterized in that, The outer diameter of the first column is smaller than that of the second column, and multiple through holes are provided on the outer wall surfaces of both the first column and the second column.

5. The temperature-sensing, self-starting perfluorohexanone fire extinguishing device according to claim 1, characterized in that, The temperature sensing component further includes a first heat-conducting fin and a second heat-conducting fin. The first heat-conducting fin is disposed at the bottom of the cylinder, and the second heat-conducting fin is disposed circumferentially on the outside of the cylinder.

6. The temperature-sensing, self-starting perfluorohexanone fire extinguishing device according to claim 1, characterized in that, The sliding member includes a pneumatic piston and a rod disposed in the upper chamber. The pneumatic piston is slidably disposed inside the cylinder, and the outer edge of the pneumatic piston abuts against the inner wall of the cylinder. One end of the rod is connected to the pneumatic piston, and the other end extends vertically into the second chamber and is connected to the convex valve.

7. The temperature-sensing, self-starting perfluorohexanone fire extinguishing device according to claim 1, characterized in that, It also includes a heat collection cover, one end of which is connected to the water collection tank, and the other end is fitted onto the outer periphery of the cylinder. The outer diameter of the heat collection cover increases vertically from top to bottom.

8. The temperature-sensing self-starting perfluorohexanone fire extinguishing device according to claim 1, characterized in that, The storage component also includes a water supply pipe, which is disposed above the water guide box. One end of the water supply pipe is connected to the first cavity, and the other end is connected to the central water supply system.

9. The temperature-sensing, self-starting perfluorohexanone fire extinguishing device according to claim 8, characterized in that, The storage component also includes a plurality of water distribution pipes, the number of which is the same as the number of spray holes. One end of each water distribution pipe is connected to the second cavity through the spray hole, and the other end extends to the outside of the second cavity.

10. The temperature-sensing, self-starting perfluorohexanone fire extinguishing device according to claim 9, characterized in that, Multiple fire sprinklers are fixedly installed on the outside of each water distribution pipe.

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