An automatic fire extinguishing device for kitchen stoves

Abstract

This utility model relates to the technical field of stove fire extinguishing devices, specifically an automatic fire extinguishing device for kitchen stoves, comprising: a stove, a support plate fixedly installed on one side of the stove, and an audible and visual alarm fixedly installed on one side of the support plate; a protective fire extinguishing mechanism, which is disposed on one side of the stove for automatic protective fire extinguishing of the stove; wherein, the protective fire extinguishing mechanism includes a fixed plate fixedly installed on one side of the support plate, and a controller fixedly installed on the surface of the fixed plate; the fire extinguishing components can be adjusted to allow the fire extinguishing components to be positioned according to the specific size and layout requirements of the stove, effectively improving the fire source coverage rate, reducing fire extinguishing blind spots, and further enhancing the applicability of the fire extinguishing device in kitchen environments of various sizes and layouts, and the protective components can be used to protect the fire extinguishing components during use, reducing the contact between oil fumes and the fire extinguishing components.

Description

Technical Field

[0001] This utility model relates to the technical field of stove fire extinguishing devices, and in particular to an automatic fire extinguishing device for kitchen stoves. Background Technology

[0002] As a frequently used and important area in homes and the catering industry, the kitchen is a high-risk area for fires due to the open flame operation, gas supply, and high-temperature work involved in the use of the stove. According to statistics, the proportion of fires caused by kitchen stoves is relatively high due to gas leaks, abnormal oil temperature rises, and human negligence. Moreover, the fires spread quickly and are difficult to extinguish in the early stages, which can easily cause significant personal and property losses. Therefore, installing efficient and reliable automatic fire protection devices in the kitchen environment has become a necessary safety measure.

[0003] Existing kitchen stove fire prevention devices typically have fire extinguishing nozzles installed above the stove. When a fire source is detected, fire extinguishing agents are sprayed to extinguish the initial fire. However, since most existing fire extinguishing nozzles are fixedly installed, it is difficult to flexibly adjust the spray position according to the different cooking points on different stoves. As a result, the fire extinguishing agent cannot accurately cover the ignition point when a fire first breaks out, reducing the overall fire extinguishing efficiency.

[0004] Therefore, an automatic fire extinguishing device for kitchen stoves is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an automatic fire extinguishing device for kitchen stoves to solve the above-mentioned problems. It improves upon the existing fire prevention devices for kitchen stoves, which typically have fire extinguishing nozzles installed above the stove. When a fire source is detected, the fire extinguishing agent is sprayed to extinguish the initial fire. However, since most of the existing fire extinguishing nozzles are fixed, it is difficult to flexibly adjust the spray position according to the different cooking points on different stoves. As a result, the fire extinguishing agent cannot accurately cover the ignition point when a fire breaks out, which reduces the overall fire extinguishing efficiency.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: an automatic fire extinguishing device for a kitchen stove, comprising: a stove, a support plate fixedly installed on one side of the stove, and an audible and visual alarm fixedly installed on one side of the support plate; a protective fire extinguishing mechanism, wherein the protective fire extinguishing mechanism for automatically protecting and extinguishing fires on the stove is disposed on one side of the stove; wherein the protective fire extinguishing mechanism includes a fixed plate fixedly installed on one side of the support plate, a controller fixedly installed on the surface of the fixed plate, an adjustable fire extinguishing component provided on the fixed plate, and a protective component provided on one side of the adjustable fire extinguishing component.

[0007] Preferably, the adjustable fire extinguishing assembly includes a fixed pipe fixedly installed on one side of a fixed plate, a guide pipe fixedly installed inside the fixed pipe, movable pipes slidably installed at both ends of the guide pipe, and nozzles provided at the ends of the two movable pipes that are far apart from each other. A temperature sensor is provided on the outside of the fixed pipe, and a storage tank is fixedly installed inside the stove. The storage tank and the guide pipe are fixedly connected by a connecting pipe. Through a simple mechanical sliding operation, the two nozzles are moved to the corresponding cooking areas, effectively covering the fire source area of ​​multiple stove burners and improving the targeting and uniformity of the fire extinguishing agent spray.

[0008] Preferably, the regulating fire extinguishing component also includes a gas pipe fixedly installed inside the stove. An electronic valve is fixedly installed on the surface of the gas pipe. In addition to driving the fire extinguishing nozzle to spray the fire extinguishing agent, the controller can also send control commands to the electronic valve simultaneously to quickly shut off the gas flow inside the gas pipe, cut off the gas supply source, and activate the audible and visual alarm.

[0009] Preferably, both ends of the guide tube are fixedly installed with resistance rings. The resistance rings are located outside the movable tube and are in contact with the movable tube. The resistance rings can provide appropriate frictional resistance, forming the necessary movement damping effect, and effectively preventing the movable tube from slipping after movement.

[0010] Preferably, both ends of the fixed tube are fixedly installed with telescopic protective sleeves, and the guide tube and the movable tube are located inside the corresponding telescopic protective sleeves. The telescopic protective sleeves can always maintain full coverage and protection of the guide tube and the movable tube when the movable tube slides, effectively preventing oil fumes in the kitchen environment from entering the interior.

[0011] Preferably, the protective component includes a magnetic block fixedly installed on the outside of the fixed tube. A connecting block is magnetically connected to the outside of the magnetic block. The temperature sensor is fixedly connected to the other side of the connecting block. When the temperature sensor needs to be cleaned, inspected, or replaced, the connecting block and the magnetic block can be separated by pulling, which makes it easy and quick to remove the temperature sensor, improving maintenance efficiency and convenience.

[0012] Preferably, the magnetic block is arranged in a ring shape, and the connecting block is located on the outside of the magnetic block. According to the actual layout of the kitchen stove or the distribution of the fire source, the detection angle of the temperature sensor can be quickly adjusted to improve the targeted coverage of the sensing range.

[0013] Preferably, a fixed frame is fixedly installed at the far ends of the two movable tubes. A rotary motor is rotatably installed inside the fixed frame, and the nozzle is fixedly installed on the surface of the rotary motor. The nozzle is connected to the inside of the movable tube. A protective frame is fixedly installed inside the fixed frame. The protective frame is located on the other side of the nozzle. A protective rotating plate is rotatably installed at the bottom of the protective frame. During non-firefighting operations, the nozzle is hidden inside the protective frame to prevent the nozzle from being blocked due to long-term exposure to the harsh environment of the kitchen, such as high temperature, oil fumes, and humidity.

[0014] The beneficial effects of this utility model are:

[0015] 1. Adjusting the fire extinguishing components allows the position of the fire extinguishing components to be adjusted according to the specific size and layout requirements of the stove, effectively improving the fire source coverage, reducing fire extinguishing blind spots, and further enhancing the applicability of the fire extinguishing device in kitchen environments of various sizes and layouts. In addition, the fire extinguishing components can be protected by protective components during use to reduce the contact between oil fumes and the fire extinguishing components.

[0016] 2. During non-firefighting operations, the nozzles can be concealed inside the protective frame to prevent them from being exposed to the harsh environment of the kitchen, such as high temperature, fumes, and humidity, which could lead to nozzle blockage, corrosion, or reduced sensitivity. This extends the service life of the nozzles and maintains their stable firefighting performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the protective fire extinguishing mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the adjustable fire extinguishing component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the protective component structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the storage tube and connecting tube structure of this utility model.

[0022] In the diagram: 100, stove; 200, support plate; 210, audible and visual alarm; 300, protective fire extinguishing mechanism; 310, fixing plate; 311, controller; 320, adjustable fire extinguishing component; 321, fixing pipe; 322, guide pipe; 323, resistance ring; 324, movable pipe; 325, nozzle; 326, temperature sensor; 327, telescopic protective sleeve; 328, gas pipe; 329, electronic valve; 3210, storage tank; 3211, connecting pipe; 330, protective component; 331, magnetic block; 332, connecting block; 333, rotary motor; 334, fixing frame; 335, protective frame; 336, protective rotating plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In practical implementation: such as Figure 1-5 As shown, an automatic fire extinguishing device for a kitchen stove includes: a stove 100, a support plate 200 fixedly installed on one side of the stove 100, and an audible and visual alarm 210 fixedly installed on one side of the support plate 200; a protective fire extinguishing mechanism 300, which is disposed on one side of the stove 100 for automatically protecting and extinguishing fire on the stove 100; wherein, the protective fire extinguishing mechanism 300 includes a fixing plate 310 fixedly installed on one side of the support plate 200, a controller 311 fixedly installed on the surface of the fixing plate 310, an adjustable fire extinguishing component 320 provided on the fixing plate 310, and a protective component 330 provided on one side of the adjustable fire extinguishing component 320.

[0025] It should be noted that existing automatic fire extinguishing devices for kitchen stoves typically include basic components such as a temperature or flame detection unit, a controller 311, a fire extinguishing agent storage tank, a fire extinguishing nozzle 325, a gas shut-off mechanism, and an audible and visual alarm module. These units work together through electrical or mechanical connections to monitor, respond to, and perform initial fire extinguishing operations in the stove area. When an abnormally high temperature or flame signal is detected in the stove area, the controller 311 will issue a command to activate the fire extinguishing nozzle 325 to spray the fire extinguishing agent for rapid fire extinguishing. The fire extinguishing component 320 and the protective component 330, as additional optimization units, respectively act on the layout adaptation and surface protection of the nozzle 325. In the non-adjusted or non-maintenance state, they are in a static locked state, without interfering with the original fire extinguishing spray path, fire extinguishing agent release process, or signal control link. They do not involve any active control or signal transmission, nor do they increase the response time or obstruct the path of the fire extinguishing action. Therefore, adjusting the settings of the fire extinguishing component 320 and the protection component 330 will not affect the normal operation of the original fire extinguishing system.

[0026] like Figure 2 , Figure 3 and Figure 5 As shown, the adjustable fire extinguishing assembly 320 includes a fixed pipe 321 fixedly installed on one side of the fixed plate 310. A guide pipe 322 is fixedly installed inside the fixed pipe 321. Movable pipes 324 are slidably installed at both ends of the guide pipe 322. A nozzle 325 is provided at the far end of each of the two movable pipes 324. A temperature sensor 326 is provided on the outside of the fixed pipe 321. A storage tank 3210 is fixedly installed inside the stove 100. The storage tank 3210 is fixedly connected to the guide pipe 322 via a connecting pipe 3211. Based on the actual layout characteristics of the kitchen stove 100, the two nozzles 325 can be moved to the desired position using a simple mechanical sliding operation. Above the cooking area, it effectively covers the fire source area of ​​multiple burners, improving the targeting and uniformity of the fire extinguishing agent spray. At the same time, a temperature sensor 326 is installed on the outside of the fixed pipe 321, which can monitor the temperature changes of the stove area 100 in real time and can detect fires. When the temperature sensor 326 detects an abnormal temperature rise, it can trigger the controller 311 to issue an early warning or fire extinguishing action. The storage tank 3210 and the guide pipe 322 are fixedly connected through the connecting pipe 3211 to ensure that the supply path of the fire extinguishing agent is not affected during the entire adjustment process. No matter how the position of the nozzle 325 is adjusted, the fire extinguishing agent can be supplied smoothly. The storage tank 3210 is equipped with;

[0027] The storage tank 3210 is equipped with a pressure stabilizing component, including a compressed air chamber for storing driving gas and a pressure-stabilizing elastic diaphragm located inside the compressed air chamber. The compressed air chamber is isolated from the extinguishing agent storage chamber and is connected to the connecting pipe 3211 through a pressure stabilizing pipeline. When a fire signal is detected and the fire extinguishing process is initiated, the high-pressure gas pre-stored in the compressed air chamber continuously applies a stable thrust to the extinguishing agent storage chamber through the pushing action of the pressure-stabilizing elastic diaphragm. This ensures that the extinguishing agent can be continuously and smoothly delivered to the nozzle 325 through the connecting pipe 3211 and the guide pipe 322 without relying on a complex pumping mechanism, thereby achieving uniform supply and stable spraying of the extinguishing agent throughout the entire fire extinguishing process.

[0028] The fire extinguishing assembly 320 also includes a gas pipe 328 fixedly installed inside the stove 100. An electronic valve 329 is fixedly installed on the surface of the gas pipe 328. When the temperature sensor 326 detects an abnormal fire, the controller 311, in addition to driving the fire extinguishing nozzle 325 to spray extinguishing agent, can also simultaneously send a control command to the electronic valve 329 to quickly shut off the gas flow inside the gas pipe 328 and cut off the gas supply. At the same time, the controller 311 simultaneously activates the audible and visual alarm 210, issuing an audible and visual emergency alarm. This not only allows for rapid cutting off of the gas source in the early stages of a fire, effectively preventing the risk of reignition or deflagration that may result from gas leaks, but also provides immediate warning to personnel on site, reminding them to evacuate quickly or take emergency measures.

[0029] Both ends of the guide tube 322 are fixedly installed with resistance rings 323. The resistance rings 323 are located outside the movable tube 324 and are in contact with the movable tube 324. When the movable tube 324 is moved for position adjustment, the resistance rings 323 can provide moderate frictional resistance and form the necessary movement damping effect. This can effectively prevent the movable tube 324 from slipping after movement without the need for an additional locking mechanism.

[0030] Both ends of the fixed tube 321 are fixedly installed with telescopic protective sleeves 327. The guide tube 322 and the movable tube 324 are located inside the corresponding telescopic protective sleeves 327. During the position adjustment and movement of the nozzle 325, the telescopic protective sleeves 327 are synchronously stretched or contracted and deformed. The telescopic protective sleeves 327 can always maintain full coverage and protection of the guide tube 322 and the movable tube 324 when the movable tube 324 slides, effectively preventing pollutants such as oil fumes, water vapor, and dust in the kitchen environment from entering the interior.

[0031] like Figure 2 , Figure 3 and Figure 4As shown, the protective component 330 includes a magnetic block 331 fixedly installed on the outside of the fixed tube 321. A connecting block 332 is magnetically connected to the outside of the magnetic block 331. The temperature sensor 326 is fixedly connected to the other side of the connecting block 332. The magnetic block 331 can provide a stable and reliable magnetic attraction force to ensure that the temperature sensor 326 remains firmly positioned. When it is necessary to clean, inspect or replace the temperature sensor 326, the connecting block 332 can be separated from the magnetic block 331 by pulling, and the temperature sensor 326 can be easily and quickly removed, improving maintenance efficiency and convenience.

[0032] The magnetic block 331 is set in a ring shape, and the connecting block 332 is located on the outside of the magnetic block 331. The connecting block 332 can slide and adjust along the ring surface of the magnetic block 331, thereby driving the temperature sensor 326 fixedly installed on the connecting block 332 to rotate synchronously. The detection angle of the temperature sensor 326 can be quickly adjusted according to the layout of the actual kitchen stove 100 or the distribution of the fire source, thereby improving the targeted coverage of the sensing range.

[0033] Two movable tubes 324 are each fixedly mounted with a fixed frame 334 at their far ends. A rotary motor 333 is rotatably mounted inside the fixed frame 334. The nozzle 325 is fixedly mounted on the surface of the rotary motor 333 and is connected to the interior of the movable tube 324. A protective frame 335 is fixedly mounted inside the fixed frame 334 and is located on the other side of the nozzle 325. A protective rotating plate 336 is rotatably mounted at the bottom of the protective frame 335. The nozzle 325 can rotate under the drive of the rotary motor 333. In normal standby mode, the nozzle 325 can rotate into the protective frame 335 under the drive of the rotary motor 333. The protective rotating plate 336 is rotatably mounted at the bottom of the protective frame 335. When the nozzle 325 rotates close to the protective frame 335, the protective rotating plate 336... 6. Automatic opening: After the sprinkler head 325 is fully retracted into the protective frame 335, the protective rotating plate 336 resets and closes, forming an effective shield and protection for the sprinkler head 325. During non-firefighting operations, the sprinkler head 325 can be hidden inside the protective frame 335, preventing the sprinkler head 325 from being exposed to the harsh environment of high temperature, oil fumes, and humidity in the kitchen for a long time, which may cause nozzle blockage, corrosion, or reduced sensitivity. This extends the service life of the sprinkler head 325 and maintains its stable fire extinguishing performance. When an abnormal fire is detected, the controller 311 can control the rotary motor 333 to reverse drive in real time, so that the sprinkler head 325 rotates out from inside the protective frame 335 to the working position, quickly completing the preparation for fire extinguishing operations. Thus, while ensuring the protection effect of the sprinkler head 325, it does not affect the initial fire response speed and fire extinguishing coverage.

[0034] It should be noted that the rotary motor 333 has a hollow shaft structure inside, with a through-hole forming a connecting channel in the middle. It is connected to the inside of the movable tube 324 through a sealed rotary joint, realizing a stable connection of the extinguishing agent delivery path between the nozzle 325 and the movable tube 324. The rotation output end of the rotary motor 333 is fixedly connected to the nozzle 325, and a high-temperature wear-resistant sealing ring is provided on the outside of the shaft. This can maintain the sealing and continuity of the extinguishing agent channel during rotation, preventing problems such as interruption of extinguishing agent flow, leakage, or pressure fluctuation caused by the rotation of the nozzle 325.

[0035] In use, this utility model uses a temperature sensor 326 to monitor the temperature of the stove area 100 in real time. When an abnormal temperature rise is detected and reaches a preset threshold, an alarm signal is issued. After receiving the signal, the controller 311 controls the rotary motor 333 to drive the nozzle 325 from inside the protective frame 335 to the working position. At the same time, the fire extinguishing agent spraying operation is started, releasing the fire extinguishing agent into the fire source area. While the nozzle 325 is spraying the fire extinguishing agent, the controller 311 simultaneously sends a closing command to the electronic valve 329 to cut off the gas supply inside the gas pipe 328, preventing the risk of reignition or deflagration due to gas leakage. At the same time, the audible and visual alarm 210 is activated, issuing an alarm signal to remind on-site personnel to evacuate in time. The fire extinguishing agent is transported from the storage tank 3210 to the nozzle 325 through the connecting pipe 3211, guide pipe 322, and movable pipe 324. The spraying process is continuous and stable. After the fire extinguishing operation is completed, the nozzle 325 can rotate back into the protective frame 335, where the protective rotating plate 336 automatically closes for shielding and protection, improving the long-term reliability of the equipment.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic fire extinguishing device for a kitchen hob, characterized in that, include: A stove (100) is provided with a support plate (200) fixedly installed on one side of the stove (100), and an audible and visual alarm (210) is fixedly installed on one side of the support plate (200). A protective fire extinguishing mechanism (300) is provided on one side of the stove (100) for automatically protecting and extinguishing fires on the stove (100). The protective fire extinguishing mechanism (300) includes a fixed plate (310) fixedly installed on one side of the support plate (200), a controller (311) fixedly installed on the surface of the fixed plate (310), an adjustable fire extinguishing component (320) provided on the fixed plate (310), and a protective component (330) provided on one side of the adjustable fire extinguishing component (320).

2. The automatic fire extinguishing device for a kitchen cooktop according to claim 1, characterized in that, The adjustable fire extinguishing assembly (320) includes a fixed pipe (321) fixedly installed on one side of a fixed plate (310). A guide pipe (322) is fixedly installed inside the fixed pipe (321). Movable pipes (324) are slidably installed at both ends of the guide pipe (322). A nozzle (325) is provided at the far end of each of the two movable pipes (324). A temperature sensor (326) is provided on the outside of the fixed pipe (321). A storage tank (3210) is fixedly installed inside the stove (100). The storage tank (3210) is fixedly connected to the guide pipe (322) through a connecting pipe (3211).

3. The automatic fire extinguishing device for a kitchen cooktop according to claim 1, characterized in that, The regulating fire extinguishing assembly (320) also includes a gas pipe (328) fixedly installed inside the stove (100), and an electronic valve (329) is fixedly installed on the surface of the gas pipe (328).

4. The automatic fire extinguishing device for a kitchen cooktop according to claim 2, characterized in that, Both ends of the guide tube (322) are fixedly installed with resistance rings (323). The resistance rings (323) are located outside the movable tube (324) and are in contact with the movable tube (324).

5. The automatic fire extinguishing device for a kitchen cooktop according to claim 4, characterized in that, Both ends of the fixed tube (321) are fixedly installed with telescopic protective sleeves (327), and the guide tube (322) and the movable tube (324) are located inside the corresponding telescopic protective sleeves (327).

6. The automatic fire extinguishing device for a kitchen cooktop according to claim 2, characterized in that, The protective component (330) includes a magnetic block (331) fixedly installed on the outside of the fixed tube (321), and a connecting block (332) is magnetically connected to the outside of the magnetic block (331). The temperature sensor (326) is fixedly connected to the other side of the connecting block (332).

7. The automatic fire extinguishing device for a kitchen cooktop according to claim 6, characterized in that, The magnetic block (331) is arranged in a ring shape, and the connecting block (332) is located outside the magnetic block (331).

8. The automatic fire extinguishing device for a kitchen cooktop according to claim 2, characterized in that, A fixed frame (334) is fixedly installed at the far ends of the two movable tubes (324). A rotary motor (333) is rotatably installed inside the fixed frame (334). The nozzle (325) is fixedly installed on the surface of the rotary motor (333). The nozzle (325) is connected to the inside of the movable tube (324). A protective frame (335) is fixedly installed inside the fixed frame (334). The protective frame (335) is located on the other side of the nozzle (325). A protective rotating plate (336) is rotatably installed at the bottom of the protective frame (335).

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