Civil grease fire extinguishing device managed by intelligent internet of things

Abstract

The invention discloses an intelligent internet-of-things management civil grease fire extinguishing device, and belongs to the technical field of fire extinguishment, the intelligent internet-of-things management civil grease fire extinguishing device comprises a wallboard, a fire extinguishing raw material conveying assembly is arranged on the upper side of the wallboard, the fire extinguishing raw material conveying assembly comprises a first connecting pipe, and one end of the first connecting pipe is connected with a threaded connecting pipe; the end, away from the threaded connecting pipe, of the first connecting pipe is connected with an electromagnetic valve, a spraying and conveying assembly is arranged on the lower side of the fire extinguishing raw material conveying assembly, and the fire extinguishing raw material conveying assembly can be directly fixed to the wall face or the side wall of a cabinet through sand blasting rust prevention treatment of a wallboard to adapt to different kitchen installation environments. A connecting sliding plate slides to be matched with a fixed limiting sliding column, so that the spraying direction of the spray head is changed, and cooking benches with different sizes such as a single-hole stove and a double-hole stove are accurately covered; the protection assembly adopts a double-group spliced protection shell made of ABS flame-retardant plastic, a trapezoidal alignment sliding block and a sliding groove are used for positioning, the spraying assembly can be fully covered after splicing, and high-temperature radiation and oil stain attachment of a cooking bench are resisted.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing, specifically to a smart IoT-managed civilian grease fire extinguishing device. Background Technology

[0002] This invention is applicable to civilian kitchen scenarios, including family residential kitchens and the back kitchens of small catering establishments (such as breakfast shops and fast food restaurants). These scenarios are generally characterized by compact space, various stove sizes (such as single-burner stoves and double-burner stoves), the generation of oil stains and high temperatures during daily cooking, and the limited professional operation capabilities of users. Furthermore, grease fires (such as oil pan fires) are characterized by concentrated fire, rapid spread, and easy reignition, requiring a fast, accurate, and easy-to-operate fire extinguishing device.

[0003] Existing civilian grease fire extinguishing devices have many limitations and fail to meet practical needs: First, they have poor installation adaptability. Most devices use a fixed structure, the nozzle angle cannot be adjusted, and they cannot adapt to the fire extinguishing coverage requirements of stoves of different sizes. Moreover, the wall panels are mostly made of ordinary plastic or thin steel plates, which are easily damaged by high-temperature oil stains in the kitchen. Second, they lack intelligent monitoring capabilities. There is a lack of real-time monitoring of the extinguishing fuel level, making it difficult for users to know the remaining fuel. This can easily lead to extinguishing failure due to insufficient fuel. At the same time, fire detection often relies on a single temperature or flame sensor, which is easily affected by kitchen lights and normal flames from stoves, resulting in misjudgments or missed detections. Third, safety protection is incomplete. Most devices rely solely on an automatic triggering system. Once the IoT module fails or there is a power outage, the fire extinguishing cannot be activated. Furthermore, the protective components are rudimentary, and core components are prone to failure due to oil stains or high-temperature radiation. Fourth, maintenance is inconvenient. Components such as nozzles and connecting pipes are mostly fixed connections, making disassembly, cleaning, or replacement difficult, increasing user maintenance costs and operational barriers. To address the above problems, this invention proposes an integrated solution that balances adaptability, intelligence, safety, and ease of use. Summary of the Invention

[0004] The purpose of this invention is to provide an intelligent IoT-managed civilian grease fire extinguishing device to solve the problems mentioned in the background art regarding existing fire extinguishing methods.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a wall panel is included, and an extinguishing material conveying assembly is provided on the upper side of the wall panel. The extinguishing material conveying assembly includes a first connecting pipe, one end of which is connected to a threaded connecting pipe, and the end of the first connecting pipe away from the threaded connecting pipe is connected to a solenoid valve. The end of the solenoid valve away from the first connecting pipe is connected to a second connecting pipe. A spraying assembly is provided on the lower side of the extinguishing material conveying assembly, and the spraying assembly includes a fixed connecting ball. A hexagonal rotating block is connected to the lower side of the fixed connecting ball, and a third connecting pipe is connected to the lower side of the hexagonal rotating block. A nozzle is connected to the lower side of the third connecting pipe.

[0006] As a further preferred embodiment of this technical solution: a fixing component is provided on one side of the spraying component, the fixing component includes a connecting plate provided on the wall panel, a connecting groove is connected to the upper side of the connecting plate, a fixing slide rod is connected to the connecting groove, a hexagonal nut is connected to one end of the fixing slide rod, a connecting slide plate is connected to the inner side of the connecting groove, a fixing limiting slide post is connected to the upper side of the connecting slide plate, and the fixing component also includes a fixing groove provided on a fixing connecting ball;

[0007] As a further preferred embodiment of this technical solution: a protective component is provided on the lower side of the wall panel, the protective component includes a protective shell, a fixing block is connected to one side of the protective shell, an installation bolt is connected to the fixing block, an alignment slider is connected to one side of the protective shell, and an alignment groove is provided on the protective shell.

[0008] As a further preferred embodiment of this technical solution: the connecting plate is fixedly connected to the wall panel, the connecting groove is fixedly connected to the upper side of the connecting plate, and the connecting slide plate is slidably connected to the inner side of the connecting groove;

[0009] As a further preferred embodiment of this technical solution: the fixed slide rod is slidably connected to the connecting slide groove and the connecting slide plate, the fixed limiting slide pin is fixedly connected to the upper side of the connecting slide plate, the fixed limiting slide pin is slidably connected to the inner side of the fixed slide groove, and the fixed components are provided in two sets and symmetrically arranged on both sides of the spraying component;

[0010] As a further preferred embodiment of this technical solution: the protective shell and the fixing block are detachably and fixedly installed on the lower side of the wall panel by mounting bolts. There are two sets of protective shells, and the alignment slider and alignment groove are evenly distributed on the two sets of protective shells. There are multiple sets of lighting lamps, which are evenly distributed on the outer side of the protective shells.

[0011] As a further preferred embodiment of this technical solution: a fire extinguishing material storage box is provided at the end of the second connecting pipe away from the solenoid valve, and a delivery pump is also provided thereon;

[0012] As a further preferred embodiment of this technical solution: a liquid level monitoring component is provided on the outside of the fire extinguishing material storage box. The liquid level monitoring component includes a transparent observation window fixed to the box wall, a float-type liquid level sensor attached to the inside of the observation window, and a scale embedded on the outside of the observation window.

[0013] The float-type liquid level sensor is electrically connected to the IoT control module via wires. The liquid level monitoring adopts a linear conversion formula: U1=k1·h+u0, where u1 is the sensor output voltage (unit: V), k1 is the conversion coefficient (0.5V / L), h is the actual liquid level height (unit: L), and U0 is the zero-point voltage (0.5V). When the calculated h≤0.25H (H is the total capacity of the storage tank), the sensor triggers a low liquid level signal, and the IoT control module pushes a replenishment reminder to the user terminal. At the same time, the top of the storage tank is equipped with a filling port with a sealed cover. The inner side of the filling port is equipped with a silicone sealing ring, and the outer side is equipped with a rotary locking buckle to prevent the fire extinguishing material from getting damp or leaking during storage.

[0014] As a further preferred embodiment of this technical solution: the wall panel is also integrated with fire detection and control components, which include an infrared flame detector, a temperature sensor and an Internet of Things control box;

[0015] Fire detection employs a dual threshold formula: S = α·P + β·(T / T0), where S is the fire detection coefficient, P is the flame spectrum matching degree (0-1, triggering flame conditions when P≥0.9), T is the measured temperature (unit: ℃), T0 is the baseline threshold temperature (280℃), and α and β are weighting coefficients (α = 0.6, β = 0.4). When S≥1, the control box automatically triggers the solenoid valve to open and the delivery pump to start, thus achieving fire extinguishing action. Simultaneously, a fire alarm is pushed to the user and property terminal via the WiFi module. The infrared flame detector has a detection angle of 120° and a detection distance covering 3-5 meters. The temperature sensor uses a high-temperature resistant probe, fixed below the spray assembly.

[0016] As a further preferred embodiment of this technical solution: the nozzle adopts a detachable wide-angle atomizing structure, with a spiral guide groove on the inner side and atomizing nozzle holes on the outer side, which can atomize the fire extinguishing material into particles, covering a fan-shaped area to ensure rapid envelopment of grease flames; the connection between the nozzle and the third connecting pipe is provided with external threads, which are fixed with anti-loosening nuts for easy disassembly, cleaning or replacement in the future; at the same time, a manual emergency triggering component is provided on the wall panel, including an emergency pull rod extending to the operating table and a mechanical trigger switch linked to the pull rod. When the Internet of Things system fails, pulling the pull rod can directly open the solenoid valve through mechanical transmission.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, the wall panel is made of 304 stainless steel and sandblasted for rust prevention, allowing it to be directly fixed to the wall or cabinet side, adapting to different kitchen installation environments; the fixing component adopts a symmetrical double-group design, which, through the sliding of the connecting slide plate and the cooperation of the fixed limiting slide column, can achieve ±30° angle adjustment of the fixing connecting ball, thereby changing the spray direction of the nozzle and accurately covering different sizes of stoves such as single-burner and double-burner stoves; the protective component is a double-group spliced ​​protective shell made of ABS flame-retardant plastic, which is positioned by the trapezoidal alignment slider and the slide groove, and after splicing, it can fully cover the spraying component, resisting the high temperature radiation and oil stains of the stove;

[0019] 2. In this invention, a float-type sensor monitors the level of the fire extinguishing fuel in real time. When the remaining level is below 1 / 4 of the total capacity, the IoT module automatically sends a replenishment reminder to prevent insufficient fuel from causing fire extinguishing failure. Fire detection combines an infrared flame detector and a temperature sensor: the former accurately identifies the spectrum of grease fires and filters out interference; the latter monitors the temperature to confirm risk when it reaches a critical value, enabling collaborative judgment using dual data. Compared to traditional single sensors, this reduces the false alarm rate and the missed alarm rate, improves response speed, initiates fire extinguishing, and curbs the spread of fire.

[0020] 3. In this invention, by adding a manual emergency trigger component and extending the ABS pull rod to the operating table, a micro switch is linked by a steel wire rope. Without relying on an Internet of Things system, pulling the pull rod directly connects the power supply to the solenoid valve and the delivery pump, forming a dual trigger protection of "automatic and manual". In terms of maintenance convenience, the nozzle adopts an external thread and nylon insert locking nut design, which can be manually disassembled and cleaned. The delivery pump and connecting pipe are connected by quick-connect couplings, which can be quickly replaced without tools. The separate layout of the material tray rack, cable and water pipe facilitates component maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a smart IoT-managed civilian grease fire extinguishing device according to the present invention. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of a smart IoT-managed civilian grease fire extinguishing device according to the present invention. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of a smart IoT-managed civilian grease fire extinguishing device according to the present invention. Figure 3 ;

[0024] Figure 4 This is a partial structural explosion diagram of a smart IoT-managed civilian grease fire extinguishing device according to the present invention. Figure 1 ;

[0025] Figure 5This is a partial structural schematic diagram of a smart IoT-managed civilian grease fire extinguishing device according to the present invention;

[0026] Figure 6 This is a partial structural explosion diagram of a smart IoT-managed civilian grease fire extinguishing device according to the present invention. Figure 2 ;

[0027] Figure 7 This is a flowchart of a fire extinguishing system for a civilian-use grease fire extinguishing device managed by the Internet of Things, according to the present invention.

[0028] In the diagram: 1. Wall panel; 2. Fire extinguishing material delivery assembly; 21. First connecting pipe; 22. Threaded connecting pipe; 23. Solenoid valve; 24. Second connecting pipe; 3. Spraying assembly; 31. Fixed connecting ball; 32. Hexagonal rotating block; 33. Third connecting pipe; 34. Nozzle; 4. Fixing assembly; 41. Connecting plate; 42. Connecting slide; 43. Fixed slide rod; 44. Hexagonal nut; 45. Connecting slide plate; 46. Fixed limiting slide column; 47. Fixed slide; 5. Protective assembly; 51. Protective shell; 52. Fixing block; 53. Mounting bolt; 54. Alignment slider; 55. Alignment slide; 56. Lighting lamp. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example

[0031] Please see Figures 1-7 As shown, the present invention provides a technical solution for a smart IoT-managed civilian grease fire extinguishing device: it includes a wall panel 1, and an extinguishing material conveying assembly 2 is provided on the upper side of the wall panel 1. The extinguishing material conveying assembly 2 includes a first connecting pipe 21, one end of the first connecting pipe 21 is connected to a threaded connecting pipe 22, the end of the first connecting pipe 21 away from the threaded connecting pipe 22 is connected to a solenoid valve 23, the end of the solenoid valve 23 away from the first connecting pipe 21 is connected to a second connecting pipe 24, and a spraying assembly 3 is provided on the lower side of the extinguishing material conveying assembly 2. The spraying assembly 3 includes a fixed connecting ball 31, a hexagonal rotating block 32 is connected to the lower side of the fixed connecting ball 31, a third connecting pipe 33 is connected to the lower side of the hexagonal rotating block 32, and a nozzle 34 is connected to the lower side of the third connecting pipe 33.

[0032] It should be noted that the wall panel 1 is made of 304 stainless steel with a thickness of 2-3mm and a sandblasted anti-rust treatment. It can be directly fixed to the wall of a civilian kitchen or the side wall of the cabinet above the stove with expansion bolts, which is suitable for the installation environment of most family kitchens. The threaded connecting pipe 22 is made of brass with an internal thread specification of G1 / 2. When it is engaged with the external thread of the first connecting pipe 21, it is wrapped with polytetrafluoroethylene sealing tape to ensure that there is no leakage during the delivery of fire extinguishing materials. The solenoid valve 23 is a normally closed two-position two-way solenoid directional valve with a rated working pressure of 0.2-1.0MPa and a response time of ≤0.5s. It can quickly cut off or open the fire extinguishing material delivery channel, which is suitable for emergency fire extinguishing needs in civilian scenarios.

[0033] In this embodiment, a fixing component 4 is provided on one side of the spraying component 3. The fixing component 4 includes a connecting plate 41 provided on the wall panel 1. A connecting groove 42 is connected to the upper side of the connecting plate 41. A fixing slide rod 43 is connected to the connecting groove 42. A hexagonal nut 44 is connected to one end of the fixing slide rod 43. A connecting slide plate 45 is connected to the inner side of the connecting groove 42. A fixing limiting slide post 46 is connected to the upper side of the connecting slide plate 45. The fixing component 4 also includes a fixing groove 47 provided on the fixing connecting ball 31.

[0034] It should be noted that the connecting plate 41 is made of Q235 steel plate by stamping and is detachably connected to the wall panel 1 by 4 sets of M4 hexagon socket head cap screws, which facilitates disassembly and adjustment during later maintenance; the connecting slide 42 is a U-shaped groove structure, and the width of the groove is matched with the thickness of the connecting slide plate 45 to ensure that the connecting slide plate 45 slides smoothly without obvious shaking; the fixing slide rod 43 is made of 45 steel with heat treatment and galvanized surface for rust prevention. Its length is adapted to the width of the connecting slide 42, and the hexagonal nut 44 is tightened and fitted with a spring washer to prevent loosening; the diameter of the fixing limit slide post 46 is matched with the width of the fixing slide post 47, and the top of the slide post is rounded to avoid scratching the inner wall of the fixing slide post 47 during sliding.

[0035] In this embodiment, a protective component 5 is provided on the lower side of the wall panel 1. The protective component 5 includes a protective shell 51. A fixing block 52 is connected to one side of the protective shell 51. An installation bolt 53 is connected to the fixing block 52. An alignment slider 54 is connected to one side of the protective shell 51. An alignment groove 55 is provided on the protective shell 51.

[0036] It should be noted that the protective shell 51 is made of ABS flame-retardant plastic injection molding with an oxygen index ≥28%, which can resist the high temperature radiation of the stove area and prevent the internal spraying component 3 from being damaged by oil or high temperature. The fixing block 52 and the protective shell 51 are integrally molded structures. The mounting bolt 53 is an M5 countersunk bolt. After tightening, the bolt head does not protrude from the surface of the protective shell 51 to prevent accidental bumps by the user. The alignment slider 54 has a trapezoidal structure, and the alignment groove 55 is a matching trapezoidal groove. When the two sets of protective shells 51 are spliced, the alignment slider 54 is inserted into the alignment groove 55 to ensure that the protective shells 51 are flat and without obvious gaps after splicing.

[0037] Specifically, the connecting plate 41 is fixedly connected to the wall panel 1, the connecting groove 42 is fixedly connected to the upper side of the connecting plate 41, and the connecting slide plate 45 is slidably connected to the inner side of the connecting groove 42.

[0038] It should be noted that the connecting plate 41 is fixed to the wall panel 1 by a combination of welding and screws. The edge of the connecting plate 41 is continuously welded to the wall panel 1, and is reinforced by two sets of M5 hexagon socket head cap screws to ensure that the fixing component 4 will not loosen during long-term use. The connecting slide 42 is fixed to the connecting plate 41 by carbon dioxide gas shielded welding. After welding, the weld is ground to remove welding slag and burrs to prevent scratching operators. The bottom of the connecting slide plate 45 is covered with a polytetrafluoroethylene wear-resistant pad to reduce the sliding friction between the connecting slide plate 45 and the connecting slide 42.

[0039] In this embodiment, the fixed slide rod 43 is slidably connected to the connecting slide groove 42 and the connecting slide plate 45, the fixed limiting slide post 46 is fixedly connected to the upper side of the connecting slide plate 45, the fixed limiting slide post 46 is slidably connected to the inner side of the fixed slide groove 47, and the fixed component 4 is provided in two sets and symmetrically arranged on both sides of the spraying component 3.

[0040] It should be noted that after the fixed slide rod 43 passes through the connecting slide groove 42 and the connecting slide plate 45, the other end is locked by a cotter pin to prevent the fixed slide rod 43 from falling out of the slide groove; the fixed limiting slide column 46 is fixed to the connecting slide plate 45 by argon arc welding, and after welding, it is inspected to ensure that there are no welding defects. The surface of the slide column is chrome-plated to reduce the sliding resistance with the fixed slide groove 47; the two sets of fixing components 4 are symmetrically distributed on the left and right sides of the fixed connecting ball 31, and the center distance is adapted to the diameter of the fixed connecting ball 31. By synchronously adjusting the position of the connecting slide plates 45 on both sides, the angle of the fixed connecting ball 31 can be adjusted, thereby changing the spray direction of the nozzle 34 to adapt to different sizes of household stoves.

[0041] Specifically, the protective shell 51 and the fixing block 52 are detachably fixed to the lower side of the wall panel 1 by mounting bolts 53. There are two sets of protective shells 51, and the alignment slider 54 and the alignment groove 55 are evenly distributed on the two sets of protective shells 51. There are multiple sets of lighting lamps 56, which are evenly distributed on the outside of the protective shells 51.

[0042] It should be noted that a spring washer and a flat washer are provided between the mounting bolt 53 and the wall panel 1. The spring washer is made of 65Mn steel, which can effectively prevent the bolt from loosening due to vibration. The flat washer is made of galvanized steel plate, which increases the contact area between the bolt and the wall panel 1 and avoids deformation of the wall panel 1 under stress. The total length of the two sets of protective shells 51 after splicing covers the overall width of the spraying assembly 3, ensuring comprehensive protection. The lighting lamp 56 is a 12V low-voltage LED lamp bead with a single power of 1W and a color temperature of 3000K warm white light. It is connected to the Internet of Things control module through wires and can be automatically turned on when a fire is detected to illuminate the stove area, making it easier for users to observe the fire extinguishing situation. It can also be used as auxiliary lighting during daily cooking.

[0043] In this embodiment, a fire extinguishing material storage box is provided at the end of the second connecting pipe 24 away from the solenoid valve 23, and a delivery pump is also provided.

[0044] It should be noted that the fire extinguishing material storage box is made of food-grade PP material through injection molding, with a capacity of 1.5-2L, suitable for the spatial layout of residential kitchens. The outer wall of the box is marked with the type of fire extinguishing material (such as "kitchen-specific ABC dry powder" or "water-based fire extinguishing agent") and the expiration date. The delivery pump is a miniature diaphragm pump with a rated flow rate, which is fixed to the top of the storage box by a bracket. The pump inlet is connected to the outlet at the bottom of the storage box through a silicone tube, and the outlet is connected to the second connecting pipe 24 through a quick-connect fitting for easy disassembly and maintenance. The motor of the delivery pump is powered by DC 12V and can be connected to a household backup power supply or lithium battery pack to ensure normal operation during power outages.

[0045] Specifically, a liquid level monitoring component is installed on the outside of the fire extinguishing material storage box. The liquid level monitoring component includes a transparent observation window fixed to the box wall, a float-type liquid level sensor attached to the inside of the observation window, and a scale embedded on the outside of the observation window.

[0046] The float-type liquid level sensor is electrically connected to the IoT control module via wires. The liquid level monitoring adopts a linear conversion formula: U1=k1·h+U0, where U1 is the sensor output voltage (unit: V), k1 is the conversion coefficient (0.5V / L), h is the actual liquid level height (unit: L), and U0 is the zero-point voltage (0.5V). When the calculated h≤0.25H (H is the total capacity of the storage tank), the sensor triggers a low liquid level signal, and the IoT control module pushes a replenishment reminder to the user terminal. At the same time, the top of the storage tank is equipped with a filling port with a sealed cover. The inner side of the filling port is equipped with a silicone sealing ring, and the outer side is equipped with a rotary locking buckle to prevent the fire extinguishing material from getting damp or leaking during storage.

[0047] It should be noted that the transparent observation window is made of polycarbonate, allowing users to easily observe the liquid level inside the tank. The edge of the observation window is ultrasonically welded to the tank wall to ensure no leakage. The float of the float-type liquid level sensor is made of EVA material, which has a lower density than the fire extinguishing material and can rise and fall synchronously with the liquid level. The sensor's signal output end is connected to the IoT control module via a waterproof plug, with a waterproof rating of IP65, suitable for the humid environment of the kitchen. The scale is made using an etching process, and a red scale line is used to mark the warning liquid level at 1 / 4 of the capacity. The sealing cap of the filling port has a screw structure. After rotating the locking buckle, the sealing cap can press the silicone sealing ring tightly. The silicone sealing ring is made of food-grade material, which is oil-resistant and aging-resistant.

[0048] In this embodiment, the wall panel 1 is also integrated with a fire detection and control component, which includes an infrared flame detector, a temperature sensor and an Internet of Things control box.

[0049] Fire detection uses a dual threshold formula: S=α·P+β·(T / T0), where S is the fire detection coefficient, P is the flame spectrum matching degree (0-1, when P≥0.9, the flame condition is triggered), T is the measured temperature (unit: ℃), T0 is the reference threshold temperature (280℃), and α and β are weighting coefficients (α=0.6, β=0.4). When S≥1, the control box automatically triggers the opening of the solenoid valve 23 and the start of the delivery pump to realize the fire extinguishing action. At the same time, the fire alarm is pushed to the user and property terminal through the WiFi module. The infrared flame detector has a detection angle of 120° and a detection distance of 3-5 meters. The temperature sensor uses a high-temperature resistant probe and is fixed below the spray assembly 3.

[0050] It should be noted that the infrared flame detector's housing is made of aluminum alloy with an anodized surface, providing strong resistance to oil stains. The detector has a fast signal sampling frequency, enabling it to quickly identify open flame signals from grease fires and effectively filter interference from kitchen lights and stove flames. The temperature sensor is a PT100 platinum resistance thermometer with a measurement accuracy of ±1℃. The probe is encased in a stainless steel protective sleeve to prevent direct contact with oil or flames. The IoT control box is a waterproof structure, integrating a power management module, a WiFi module, and a backup lithium battery in addition to the MCU chip. Status indicator lights are located on the surface of the control box: green indicates normal standby, red indicates a fire alarm, and yellow indicates a low liquid level warning, allowing users to quickly assess the device's status.

[0051] Specifically, the nozzle 34 adopts a detachable wide-angle atomizing structure. The inner side of the nozzle 34 is provided with a spiral guide groove, and the outer side is provided with atomizing nozzle holes, which can atomize the fire extinguishing material into particles, covering a fan-shaped area to ensure rapid coverage of grease flames. The connection between the nozzle 34 and the third connecting pipe 33 is provided with external threads, which are fixed with anti-loosening nuts for easy disassembly, cleaning or replacement in the future. At the same time, the wall panel 1 is provided with a manual emergency triggering component, including an emergency pull rod extending to the operating table and a mechanical trigger switch linked to the pull rod. When the Internet of Things system fails, pulling the pull rod can directly open the solenoid valve 23 through mechanical transmission.

[0052] It should be noted that the spiral guide groove of the nozzle 34 is a left-handed structure, which allows the extinguishing material to form a rotating flow inside the nozzle 34, enhancing the atomization effect. The nozzle 34 is made of 304 stainless steel with a polished surface, making it less prone to oil stains and easy to clean. The anti-loosening nut is a nylon insert locking nut. After tightening, the nylon ring fits tightly with the thread to prevent the nozzle 34 from loosening under vibration or spray pressure. The emergency pull rod is made of ABS plastic with a non-slip handle at the end. The pull rod is connected to the mechanical trigger switch via a steel wire rope. The steel wire rope is covered with a nylon protective tube to prevent wear from long-term use. The mechanical trigger switch is a micro switch with a triggering force ≤5N. After the switch is closed, it directly connects the power circuit of the solenoid valve 23 and the delivery pump without going through the Internet of Things control module, ensuring that the fire extinguishing action can be quickly initiated in an emergency. A return spring is provided below the pull rod, which will automatically reset after the pull rod is released after triggering.

[0053] Working principle or structural principle: First, fix the 304 stainless steel wall panel to the wall above the kitchen stove or the side wall of the cabinet using expansion bolts, ensuring that the vertical distance between the wall panel and the stove is 30-50cm (to match the spray range of the nozzle); then install the double protective shell: fix the protective shell to the lower side of the wall panel using M5 countersunk bolts (with 65Mn spring washers and galvanized flat washers), and align the trapezoidal alignment slider with the slide groove to ensure that the protective shell completely covers the spraying component; finally, adjust the angle of the spraying component: slide the connecting slide plate in the slide groove (the bottom PTFE gasket reduces friction), which drives the fixed limit slide column to move in the slide groove of the fixed connecting ball until the nozzle is aligned with the core area of ​​the stove. After adjustment, lock the fixed slide rod with hexagonal nuts and lock the end of the slide rod with cotter pins to complete the initial installation;

[0054] After the device is powered on, each component enters real-time monitoring mode:

[0055] The float-type liquid level sensor is attached to the inside of the transparent observation window of the storage box and moves synchronously with the rise and fall of the raw material liquid level. It converts the liquid level height h into an output voltage through a linear conversion formula. The sensor transmits the voltage signal to the IoT control box through a waterproof plug (IP65). When the control box calculates that h≤0.25H, it triggers a low liquid level warning and pushes a replenishment reminder to the user's mobile phone via WiFi module. At the same time, the yellow indicator light on the control box lights up.

[0056] The infrared flame detector collects the flame spectrum of the stove area in real time and outputs the spectral matching degree P(0-1); the platinum resistance PT100 temperature sensor is fixed 10-15cm below the spraying assembly and collects the ambient temperature T in real time; both signals are transmitted to the MCU chip of the control box, and the chip continuously calculates the fire judgment coefficient S through the dual threshold formula. The green indicator light of the control box is always on to indicate standby.

[0057] In the event of a grease fire, the device will initiate fire suppression according to the logic of "automatic priority, manual backup":

[0058] If the flame spectrum matching degree P≥0.9 and the ambient temperature T≥280℃, then the fire judgment coefficient S≥1, and the control box immediately triggers an action. On the one hand, it connects the power supply to the solenoid valve and the micro diaphragm pump, and on the other hand, it turns on the 12V low-voltage LED beads on the outside of the protective shell. The extinguishing material flows out from the bottom of the storage box (food-grade PP material), enters the delivery pump through the silicone tube, and after being pressurized, passes through the second connecting pipe, the solenoid valve, the first connecting pipe (equipped with a brass threaded connecting pipe and a PTFE sealing tape to prevent leakage), and the third connecting pipe in sequence, and finally enters the nozzle. The left-hand spiral guide groove on the inside of the nozzle makes the material form a rotating flow, which is atomized into 50-100μm particles through 3 sets of symmetrical atomizing nozzles, covering the stove and quickly suffocating the grease flame. At the same time, the IoT control box pushes the fire alarm to the user and property terminal through the WiFi module, and the red indicator light on the control box flashes.

[0059] In case of IoT system failure or power outage, users can pull the ABS emergency lever (with non-slip handle) that extends to the control panel. The steel wire rope will drive the micro switch to close, directly connecting the power supply to the solenoid valve and delivery pump, bypassing the IoT control module to start the fire extinguishing operation. The reset spring under the lever ensures that it will reset after being triggered, preventing accidental continuous triggering.

[0060] After the fire is extinguished, turn off the main power supply of the device, loosen the nylon insert locking nut of the nozzle, and disassemble the nozzle for oil cleaning; if the liquid level monitor shows insufficient raw material, unscrew the sealing cap with silicone sealing ring on the top of the storage tank, and add fire extinguishing material through the feeding port until the scale of the transparent observation window shows a liquid level higher than 1 / 4 of the capacity; check whether all connecting pipe joints (such as quick-connect joints and external thread straight pipe joints) are loose, and if there is leakage, re-wrap the sealing tape or replace the joint; after maintenance is completed, turn the power back on, the green indicator light on the control box will light up, and the device will return to standby mode.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0062] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art, inspired by this description, design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the scope of protection of this invention.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart IoT-managed civilian grease fire extinguishing device, characterized in that: The device includes a wall panel (1), and an extinguishing material conveying assembly (2) is provided on the upper side of the wall panel (1). The extinguishing material conveying assembly (2) includes a first connecting pipe (21), one end of the first connecting pipe (21) is connected to a threaded connecting pipe (22), the end of the first connecting pipe (21) away from the threaded connecting pipe (22) is connected to a solenoid valve (23), the end of the solenoid valve (23) away from the first connecting pipe (21) is connected to a second connecting pipe (24), and a spraying assembly (3) is provided on the lower side of the extinguishing material conveying assembly (2). The spraying assembly (3) includes a fixed connecting ball (31), the lower side of the fixed connecting ball (31) is connected to a hexagonal rotating block (32), the lower side of the hexagonal rotating block (32) is connected to a third connecting pipe (33), and the lower side of the third connecting pipe (33) is connected to a nozzle (34).

2. The intelligent IoT-managed civilian grease fire extinguishing device according to claim 1, characterized in that: A fixing component (4) is provided on one side of the spraying component (3). The fixing component (4) includes a connecting plate (41) provided on the wall panel (1). A connecting groove (42) is connected to the upper side of the connecting plate (41). A fixing rod (43) is connected to the connecting groove (42). A hexagonal nut (44) is connected to one end of the fixing rod (43). A connecting slide plate (45) is connected to the inner side of the connecting groove (42). A fixing limiting slide post (46) is connected to the upper side of the connecting slide plate (45). The fixing component (4) also includes a fixing groove (47) provided on the fixing connecting ball (31).

3. The intelligent IoT-managed civilian grease fire extinguishing device according to claim 2, characterized in that: A protective component (5) is provided on the lower side of the wall panel (1). The protective component (5) includes a protective shell (51). A fixing block (52) is connected to one side of the protective shell (51). An installation bolt (53) is connected to the fixing block (52). An alignment slider (54) is connected to one side of the protective shell (51). An alignment groove (55) is provided on the protective shell (51).

4. The intelligent IoT-managed civilian grease fire extinguishing device according to claim 3, characterized in that: The connecting plate (41) is fixedly connected to the wall panel (1), the connecting groove (42) is fixedly connected to the upper side of the connecting plate (41), and the connecting slide plate (45) is slidably connected to the inner side of the connecting groove (42).

5. A smart IoT-managed civilian grease fire extinguishing device according to claim 4, characterized in that: The fixed slide rod (43) is slidably connected to the connecting slide groove (42) and the connecting slide plate (45). The fixed limiting slide post (46) is fixedly connected to the upper side of the connecting slide plate (45). The fixed limiting slide post (46) is slidably connected to the inner side of the fixed slide groove (47). The fixed component (4) is provided in two sets and is symmetrically arranged on both sides of the spraying component (3).

6. A smart IoT-managed civilian grease fire extinguishing device according to claim 5, characterized in that: The protective shell (51) and the fixing block (52) are detachably and fixedly installed on the lower side of the wall panel (1) by mounting bolts (53). There are two sets of the protective shell (51), and the alignment slider (54) and the alignment groove (55) are evenly distributed on the two sets of protective shells (51). There are multiple sets of lighting lamps (56) evenly distributed on the outside of the protective shell (51).

7. A smart IoT-managed civilian grease fire extinguishing device according to claim 6, characterized in that: The second connecting pipe (24) is equipped with a fire extinguishing material storage box at the end away from the solenoid valve (23) and is also equipped with a delivery pump.

8. A smart IoT-managed civilian grease fire extinguishing device according to claim 7, characterized in that: A liquid level monitoring component is installed on the outside of the fire extinguishing material storage box. The liquid level monitoring component includes a transparent observation window fixed to the box wall, a float-type liquid level sensor attached to the inside of the observation window, and a scale embedded on the outside of the observation window. The float-type liquid level sensor is electrically connected to the IoT control module via wires. The liquid level monitoring adopts a linear conversion formula: U1=k1·h+U0, where U1 is the sensor output voltage (unit: V), k1 is the conversion coefficient (0.5V / L), h is the actual liquid level height (unit: L), and U0 is the zero-point voltage (0.5V). When the calculated h≤0.25H (H is the total capacity of the storage tank), the sensor triggers a low liquid level signal, and the IoT control module pushes a replenishment reminder to the user terminal. At the same time, the top of the storage tank is equipped with a filling port with a sealed cover. The inner side of the filling port is equipped with a silicone sealing ring, and the outer side is equipped with a rotary locking buckle to prevent the fire extinguishing material from getting damp or leaking during storage.

9. A smart IoT-managed civilian grease fire extinguishing device according to claim 8, characterized in that: The wall panel (1) is also integrated with fire detection and control components, including an infrared flame detector, a temperature sensor and an Internet of Things control box; Fire determination adopts a dual threshold formula: S=α·P+β·(T / T0), where S is the fire determination coefficient, P is the flame spectrum matching degree (0-1, when P≥0.9, the flame condition is triggered), T is the measured temperature (unit: ℃), T0 is the benchmark threshold temperature (280℃), α and β are weighting coefficients (α=0.6, β=0.4); when S≥1, the control box automatically triggers the solenoid valve (23) to open and the delivery pump to start, realizing the fire extinguishing action; at the same time, the fire alarm is pushed to the user and property terminal through the WiFi module. The infrared flame detector has a detection angle of 120° and a detection distance covering 3-5 meters. The temperature sensor adopts a high temperature resistant probe and is fixed below the spray assembly (3).

10. A smart IoT-managed civilian grease fire extinguishing device according to claim 9, characterized in that: The nozzle (34) adopts a detachable wide-angle atomizing structure. The inner side of the nozzle (34) is provided with a spiral guide groove and the outer side is provided with atomizing nozzle holes, which can atomize the fire extinguishing material into particles and cover the area in a fan shape to ensure rapid coverage of grease flames. The connection between the nozzle (34) and the third connecting pipe (33) is provided with an external thread, which is fixed with an anti-loosening nut for easy disassembly, cleaning or replacement in the future. At the same time, the wall panel (1) is provided with a manual emergency triggering component, including an emergency pull rod extending to the operating table and a mechanical triggering switch linked with the pull rod. When the Internet of Things system fails, pulling the pull rod can directly open the solenoid valve (23) through mechanical transmission.

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