Automatic fire extinguishing device and integrated cooker

Abstract

The utility model relates to the technical field of integrated cookers, in particular to an automatic fire extinguishing device and an integrated cooker. The automatic fire extinguishing device comprises a storage box, a fire extinguishing pot cover, a rope and an electromagnetic mechanism; the storage box is located above the cooking range, the storage box is provided with a containing groove with a downward opening, and the containing groove is configured to be capable of directly facing the cooking range during fire extinguishing; the fire extinguishing pot cover is made of a magnetic material and can be accommodated in the accommodating groove; the rope comprises a vertical section, one end of the vertical section is connected with the top end of the fire-extinguishing pot cover, and the other end extends to the center of the accommodating groove; the length of the vertical section is smaller than the distance between the storage box and the bottom of the cookware placed on the cooking range in the vertical line direction; the electromagnetic mechanism is configured to be capable of magnetically adsorbing the fire extinguishing pot cover into the accommodating groove when being electrified; or the fire extinguishing pot cover is configured to enable the fire extinguishing pot cover to fall into the pot under the action of gravity during power failure. In this way, fire extinguishing of the cookware can be efficiently completed in time, and the fire extinguishing effect is good.

Description

Technical Field

[0001] This utility model relates to the field of integrated stove technology, specifically to an automatic fire extinguishing device and an integrated stove. Background Technology

[0002] If a grease fire occurs while cooking with an integrated cooktop and the flames are accidentally sucked into the air duct or fan housing, the situation becomes extremely dangerous. This is especially true when there is a significant amount of grease buildup inside the air duct and fan housing; the integrated cooktop is highly susceptible to combustion, potentially even leading to a gas explosion, posing a serious threat to the user's life and property.

[0003] One existing technical solution involves adding a firewall (temperature sensor) to the air duct to detect the intake of flames and shutting off the power and gas supply via a controller to achieve a certain level of protection. However, this method still has shortcomings. If firefighting measures are not taken in time while the oil pan is still burning, the fire may continue to spread, producing a large amount of harmful gases and potentially causing a greater safety accident.

[0004] Another method involves installing a sprinkler system on the host computer or in another location to spray extinguishing agents when the oil pan catches fire. While this can effectively extinguish the fire, it causes secondary pollution to the cooking process and kitchen hygiene.

[0005] However, the above-mentioned fire extinguishing methods were all ineffective. Utility Model Content

[0006] The purpose of this utility model includes, for example, providing an automatic fire extinguishing device and an integrated stove, which can extinguish the fire of cookware in a timely and efficient manner, and has a good fire extinguishing effect.

[0007] The embodiments of this utility model can be implemented as follows:

[0008] In a first aspect, this utility model provides an automatic fire extinguishing device, comprising:

[0009] Storage box, fire extinguisher lid, rope, and electromagnetic mechanism;

[0010] The storage box is located above the stove head and has a downward-facing receiving groove, which is configured to face the stove head when extinguishing a fire. The fire extinguisher lid is made of magnetic material and can be stored in the receiving groove.

[0011] The rope includes a vertical section, one end of which is connected to the top of the fire extinguisher lid, and the other end extends to the center of the receiving groove; and the length of the vertical section is less than the vertical distance between the storage box and the bottom of the pot placed on the stove.

[0012] The electromagnetic mechanism is configured to magnetically attract the fire extinguisher lid into the receiving groove when energized; or to allow the fire extinguisher lid to fall into the pot under gravity when de-energized.

[0013] In an optional embodiment, a micro switch electrically connected to the electromagnetic mechanism is also included; the micro switch is disposed in the storage box, and the contacts of the micro switch extend into the receiving groove;

[0014] The micro switch is configured to be normally open, and when the fire extinguisher lid abuts the contact, the micro switch closes and causes the electromagnetic mechanism to be activated to keep the fire extinguisher lid energized.

[0015] In an optional embodiment, the distance between the center of the receiving groove and the vertical direction of the top of the stove head is L2;

[0016] The distance between the top of the stove head and the lowest point of the fire extinguisher pot lid after it has fallen is L3;

[0017] The vertical section of the rope is L2-L3.

[0018] In an optional embodiment, a limiting block is also included, which is disposed on the smoke baffle. One end of the rope is connected to the limiting block, and the other end passes through the central hole of the receiving groove and is connected to the fire extinguisher lid.

[0019] The rope also includes a horizontal section extending from the limiting block to the center of the receiving groove, the length of which is L1;

[0020] The total length of the rope is L = L1 + L2 - L3.

[0021] In an optional implementation, a shaft support is also included;

[0022] The shaft support includes a rotating shaft and a bracket, with the bracket disposed in the center hole of the receiving groove; and the rotating shaft is flush with the center hole of the receiving groove, and the rope passes around the surface of the rotating shaft to pass through the center hole and is connected to the fire extinguisher lid.

[0023] In an optional embodiment, at least one protrusion is provided on the bottom of the receiving groove, the protrusion extending toward the opening of the receiving groove; and a countersunk hole is provided on the side of the protrusion away from the receiving groove, the opening of the countersunk hole being away from the stove head; the electromagnetic mechanism is disposed in the countersunk hole.

[0024] When the electromagnetic mechanism is energized, the fire extinguisher lid is attracted to the protrusion in the receiving groove.

[0025] In an optional embodiment, the storage box is connected to the smoke baffle; the storage box is retractably disposed within the smoke baffle along the surface direction of the smoke baffle.

[0026] In an optional embodiment, a guide rail and a telescopic mechanism are also included; the guide rail is disposed on the smoke baffle, and the storage box is slidably engaged with the guide rail; the fixed end of the telescopic mechanism is connected to the smoke baffle, and the telescopic end of the telescopic mechanism is connected to the storage box, so as to drive the storage box to move closer to or away from the smoke baffle.

[0027] In an optional embodiment, a drive mechanism, a gear, and a rack are also included; the gear is disposed on the smoke baffle, and the rack is disposed on the storage box; or the gear is disposed on the storage box, and the rack is disposed on the smoke baffle; the gear meshes with the rack; the drive mechanism is connected to the gear to drive the gear to rotate, thereby causing the storage box to move closer to or further away from the smoke baffle.

[0028] In an optional embodiment, a temperature sensor is also included, which is disposed at the bottom of the smoke hood or on the smoke baffle plate, and the temperature sensor is electrically connected to the electromagnetic mechanism.

[0029] The rope is detachably connected to the fire extinguisher lid.

[0030] Secondly, this utility model provides an integrated stove, including the automatic fire extinguishing device described in any of the foregoing embodiments.

[0031] The beneficial effects of this utility model embodiment include, for example:

[0032] This automatic fire extinguishing device includes a storage box, a fire extinguisher lid, a rope, and an electromagnetic mechanism. Because the fire extinguisher lid is made of magnetic material, the electromagnetic mechanism can both generate magnetic attraction when energized to hold the lid in the receiving groove, and remove the magnetic attraction when de-energized, allowing the lid to fall freely into the pot under its own weight, quickly covering the burning oil. This cuts off the fire source from air contact, extinguishing the fire rapidly without affecting the cooking environment. The rope's length is approximately equal to the distance between the receiving groove and the bottom of the pot. The rope effectively pulls the lid down, preventing it from impacting the pot during rapid descent and avoiding hot oil splattering that could burn the user. This automatic fire extinguishing device is simple in structure, easy to operate, has good fire extinguishing effect, and does not produce secondary pollution. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the automatic fire extinguishing device according to an embodiment of the present invention;

[0035] Figure 2 This is a structural schematic diagram of the automatic fire extinguishing device from another perspective, according to an embodiment of the present utility model.

[0036] Figure 3 This is a cross-sectional schematic diagram of the automatic fire extinguishing device according to an embodiment of the present utility model;

[0037] Figure 4 This is a structural schematic diagram of the automatic fire extinguishing device from another perspective, representing an embodiment of the present invention.

[0038] Icons: 10-Automatic fire extinguishing device; 11-Electromagnetic mechanism; 12-Micro switch; 13-Limit block; 14-Temperature sensor; 100-Storage box; 110-Accommodation groove; 111-Center hole; 120-Boss; 122-Counterhead; 200-Fire extinguisher pot lid; 300-Rope; 310-Horizontal section; 320-Vertical section; 400-Shaft bracket; 410-Rotating shaft; 420-Bracket; 510-Guide rail; 520-Telescopic mechanism; 20-Integrated stove; 21-Cooktop; 22-Potware; 23-Smoke baffle; 24-Smoke hood assembly. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0042] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model.

[0043] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0044] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0045] Please refer to Figure 1 This embodiment provides an automatic fire extinguishing device 10, including:

[0046] Storage box 100, fire extinguisher lid 200, rope 300, and electromagnetic mechanism 11;

[0047] The storage box 100 is located above the stove head 21. The storage box 100 has a downward-facing receiving groove 110, which is configured to face the stove head 21 when the fire is extinguished. The fire extinguisher lid 200 is made of magnetic material and can be stored in the receiving groove 110.

[0048] The rope 300 includes a vertical section 320, one end of which is connected to the top of the fire extinguisher lid 200, and the other end extends to the center of the receiving groove 110; and the length of the vertical section 320 is less than the vertical distance between the storage box 100 and the bottom of the pot 22 placed on the stove 21.

[0049] The electromagnetic mechanism 11 is configured to magnetically attract the fire extinguisher lid 200 into the receiving groove 110 when energized; or to allow the fire extinguisher lid 200 to fall into the pot 22 under gravity when de-energized.

[0050] The automatic fire extinguishing device 10 of this solution features a pot lid 200 made of magnetic material. The electromagnetic mechanism 11 can both generate magnetic attraction when energized to hold the pot lid 200 in the receiving groove 110, and remove the magnetic attraction when de-energized, allowing the pot lid 200 to fall freely into the pot 22 under its own weight, quickly covering the burning oil pan. This cuts off the contact between the fire source and the air, extinguishing the fire rapidly without affecting the cooking environment. The length of the rope 300 is approximately equal to the distance between the receiving groove 110 and the bottom of the pot. The rope 300 effectively pulls the pot lid 200, preventing it from impacting the pot 22 during rapid descent and avoiding hot oil splattering that could burn the user. This automatic fire extinguishing device 10 features a simple structure, convenient operation, good fire extinguishing effect, and no secondary pollution.

[0051] Please continue reading. Figure 1 , Figure 2 , Figure 3 and Figure 4 To learn more about the structural details of the automatic fire extinguishing device 10.

[0052] In this embodiment of the present invention, the rope 300 and the fire extinguisher lid 200 are detachably connected. This facilitates cleaning and reinstallation of the fire extinguisher lid 200 after extinguishing the fire. Optionally, the electromagnetic mechanism 11 is an electromagnet. The receiving groove 110 is a circular cylindrical groove, and the fire extinguisher lid 200 is a circular lid.

[0053] from Figure 1 and Figure 2 As can be seen from the image, the storage box 100 in this embodiment has two receiving grooves 110, and each receiving groove 110 is provided with a fire extinguisher lid 200, a rope 300 and an electromagnetic mechanism 11.

[0054] In an optional embodiment, the automatic fire extinguishing device 10 further includes a micro switch 12 that can be electrically connected to the electromagnetic mechanism 11; the micro switch 12 is disposed in the storage box 100, and the contacts of the micro switch 12 extend into the receiving groove 110; the micro switch 12 is configured to be normally open, and when the fire extinguisher lid 200 abuts against the contacts, the micro switch 12 closes and causes the electromagnetic mechanism 11 to be linked to maintain power supply, thereby attracting the fire extinguisher lid 200.

[0055] One way to use the micro switch 12 is that after the user cleans the fire extinguisher lid 200, he or she manually puts the fire extinguisher lid 200 into the receiving groove 110 of the storage box 100 body, triggering the micro switch 12 to connect; at this time, the electromagnetic mechanism 11 is energized and attracts the fire extinguisher lid 200.

[0056] from Figure 1 and 2It can also be seen that, in an optional embodiment, the automatic fire extinguishing device 10 further includes a limiting block 13, which is disposed on the smoke baffle 23. The rope 300 also includes a horizontal section 310 extending from the limiting block 13 to the center of the receiving groove 110. One end of the horizontal section 310 of the rope 300 is connected to the limiting block 13, and the other end of the horizontal section 310 passes through the central hole 111 of the receiving groove 110 and is connected to the fire extinguisher lid 200 via a vertical section 320. By placing the end of the rope 300 away from the fire extinguisher lid 200 on the smoke baffle 23, the impact of the storage box 100 falling on the fire extinguisher lid 200 can be reduced, ensuring the stability and reliability of the storage box 100.

[0057] The automatic fire extinguishing device 10 also includes a shaft support 400; a central hole 111 is provided in the center of the receiving groove 110. The shaft support 400 includes a rotating shaft 410 and a bracket 420, with the bracket 420 disposed in the central hole 111 of the receiving groove 110; and the rotating shaft 410 is flush with the central hole 111 of the receiving groove 110. The rope 300 passes around the surface of the rotating shaft 410, passes through the central hole 111, and is connected to the fire extinguisher lid 200. That is, the horizontal section 310 can bypass the rotating shaft 410 of the shaft support 400 and turn to connect with the vertical section 320, thus ensuring the smooth movement of the rope 300 as the fire extinguisher lid 200 falls. On the other hand, the shaft support 400 can also ensure the effective sliding of the rope 300 and keep the fire extinguisher lid 200 perpendicular to the center of the pot 22.

[0058] like Figure 1 , Figure 2 and Figure 3 In an optional embodiment, at least one boss 120 is provided on the bottom of the receiving groove 110, and the boss 120 extends toward the opening of the receiving groove 110; and a countersunk hole 122 is provided on the side of the boss 120 away from the receiving groove 110, and the opening of the countersunk hole 122 is away from the stove head 21; the electromagnetic mechanism 11 is provided in the countersunk hole 122; when the electromagnetic mechanism 11 is energized, the fire extinguisher lid 200 is attracted to the boss 120 in the receiving groove 110.

[0059] The protrusion 120 here serves as a support point when the fire extinguisher lid 200 is stored in the receiving groove 110. This reduces the contact area between the storage box 100 body and the fire extinguisher lid 200, ensuring that the fire extinguisher lid 200 falls off quickly at the first moment. At the same time, the countersunk hole 122 set in the protrusion 120 can also serve as the installation space for the electromagnetic mechanism 11, which has the advantages of reducing the volume of the automatic fire extinguishing device 10 and improving the space utilization of the storage box 100.

[0060] Optionally, in this embodiment, three bosses 120 are evenly distributed around the central hole 111 of the receiving groove 110, and each boss 120 has a countersunk hole 122 provided with an electromagnetic mechanism 11.

[0061] Please continue reading. Figure 1 , Figure 2 and Figure 3 In an optional embodiment, the storage box 100 is connected to the smoke baffle 23; the storage box 100 is retractably disposed within the smoke baffle 23 along the surface direction of the smoke baffle 23. Because the width of the smoke baffle 23 is smaller than the width of the lower unit where the burner 21 is located, this ensures that there is more operating space above the cookware 22 on the burner 21. The storage box 100 can extend above the burner 21 to ensure that the fire extinguisher falls vertically to the cookware 22 to extinguish the fire; at the same time, the storage box 100 can retract into the smoke baffle 23 to ensure that there is more operating space above the burner 21.

[0062] It should be noted that the storage box 100 is retractably set inside the smoke baffle 23, and the electromagnetic mechanism 11 effectively magnetically adsorbs the fire extinguisher lid 200 into the storage groove, keeping the fire extinguisher lid 200 below the bottom plane of the storage box 100, and keeping the micro switch 12 in the normally closed state. This ensures that the storage box 100 can be stably retracted into the smoke baffle.

[0063] In this embodiment of the present invention, the automatic fire extinguishing device 10 further includes a guide rail 510 and a telescopic mechanism 520; the guide rail 510 is disposed on the smoke baffle 23, and the storage box 100 is slidably engaged with the guide rail 510; the fixed end of the telescopic mechanism 520 is connected to the smoke baffle 23, and the telescopic end of the telescopic mechanism 520 is connected to the storage box 100 to drive the storage box 100 to move closer to or away from the smoke baffle 23. The smooth retraction of the storage box 100 using the guide rail 510 and the telescopic mechanism 520 is merely an example and is not intended to limit the scope of the invention.

[0064] Optionally, the telescopic mechanism 520 is an electric push rod. The electric push rod body is fixed on the smoke baffle 23, and the storage box 100 is connected to the smoke baffle 23 through the left and right guide rails 510 and is connected to the movable side of the electric push rod to achieve smooth retraction of the storage box 100.

[0065] It is not understood that in other embodiments of this utility model, in optional implementations, the automatic fire extinguishing device 10 further includes a drive mechanism, a gear, and a rack; the gear is disposed on the smoke baffle 23, and the rack is disposed on the storage box 100; or the gear is disposed on the storage box 100, and the rack is disposed on the smoke baffle 23; the gear meshes with the rack; the drive mechanism is connected to the gear to drive the gear to rotate, thereby causing the storage box 100 to move closer to or further away from the smoke baffle 23.

[0066] Please continue reading. Figure 4 To prevent the fire extinguisher lid 200 from impacting the pot 22 when it falls rapidly, and to avoid hot oil splashing and scalding the user, the length of the rope 300 should meet the requirements: the distance of the vertical section 320 of the rope 300 should be L2-L3.

[0067] Wherein, L2 is the vertical distance between the center of the receiving groove 110 and the top of the stove head 21; L3 is the distance between the top of the stove head 21 and the lowest point of the fire extinguisher lid 200 after it falls, i.e., the safety distance; the distance of the vertical section 320 of the rope 300 is L2-L3. Setting the safety distance L3 can ensure that the fire extinguisher lid 200 can completely cover the pot 22, and can also avoid the impact of the fire extinguisher lid 200 on the bottom of the pot 22.

[0068] Furthermore, the total length L of the rope 300 is required to be: L = L1 + L2 - L3. The length of the horizontal segment 310 is L1, which is the distance of the rope 300 from the limiting block 13 to the center of the support 420 of the rotating shaft 410.

[0069] In an optional embodiment, the automatic fire extinguishing device 10 further includes a temperature sensor 14, which is disposed at the bottom of the smoke hood or on the smoke baffle 23, and the temperature sensor 14 can be electrically connected to the electromagnetic mechanism 11.

[0070] When in use, when the oil pan catches fire, the flames are drawn into the air duct. When the firewall detects that the temperature exceeds the first preset threshold and the duration exceeds the first preset threshold, the electric push rod pushes the storage box 100 to the designated position, cuts off the electromagnet power, and the fire extinguisher lid 200 falls rapidly under the action of gravity and covers the burning oil pan, thereby cutting off the contact between the combustibles and the air, and extinguishing the fire quickly.

[0071] Once the firewall temperature is below the first preset temperature threshold, the range hood will start operating at high power to quickly expel harmful gases and improve kitchen air quality.

[0072] After the user cleans the fire extinguisher lid 200, they manually place the fire extinguisher lid 200 into the receiving groove 110 of the storage box 100 body, triggering the micro switch 12 to connect. At this time, the electromagnet is energized and attracts the fire extinguisher lid 200. To prevent pinching, the electric push rod performs the storage box 100 retraction action after reaching the second preset time threshold.

[0073] Thus, a temperature sensor 14 is installed at the bottom of the smoke hood or on the smoke baffle 23, so that the oil pan can be judged to be on fire based on the temperature threshold and the time threshold.

[0074] By combining the threshold value of temperature sensor 14 with the status of micro switch 12, it is possible to determine whether the fire extinguisher lid 200 has effectively fallen. An alarm can be triggered if either temperature sensor 14 or micro switch 12 malfunctions.

[0075] Secondly, this utility model provides an integrated stove 20, which includes an automatic fire extinguishing device 10 according to any of the aforementioned embodiments.

[0076] Further, such as Figure 1As shown, the integrated stove 20 in this embodiment includes two burners 21 and two automatic fire extinguishing devices 10, with each burner 21 corresponding to one automatic fire extinguishing device 10. The two automatic fire extinguishing devices 10 share a storage box 100. The smoke baffle 23 is fixed on the smoke collection hood assembly 24, and a movable storage box 100 is provided inside the smoke baffle 23.

[0077] In summary, this utility model embodiment provides an automatic fire extinguishing device 10 and an integrated stove 20, which have at least the following advantages:

[0078] It can detect oil fires immediately and quickly cover the burning oil pan with the fire extinguishing pot lid 200, thereby cutting off the contact between the fire source and the air, extinguishing the fire quickly, and at the same time turning on the high-power mode of the range hood to improve the air quality in the kitchen.

[0079] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An automatic fire extinguishing device, characterized in that, include: Storage box (100), fire extinguisher lid (200), rope (300) and electromagnetic mechanism (11); The storage box (100) is located above the stove head (21). The storage box (100) has a downward-facing receiving groove (110), which is configured to face the stove head (21) when extinguishing the fire. The fire extinguisher lid (200) is made of magnetic material and can be stored in the receiving groove (110). The rope (300) includes a vertical section (320), one end of which is connected to the top of the fire extinguisher lid (200), and the other end extends to the center of the receiving groove (110); and the length of the vertical section (320) is less than the distance in the vertical direction between the storage box (100) and the bottom of the pot (22) placed on the stove (21); The electromagnetic mechanism (11) is configured to magnetically attract the fire extinguisher lid (200) into the receiving groove (110) when energized; or to allow the fire extinguisher lid (200) to fall into the pot (22) under gravity when de-energized.

2. The automatic fire extinguishing device according to claim 1, characterized in that: It also includes a micro switch (12) that can be electrically connected to the electromagnetic mechanism (11); the micro switch (12) is disposed in the storage box (100), and the contacts of the micro switch (12) extend into the receiving groove (110); The micro switch (12) is configured to be normally open, and when the fire extinguisher lid (200) abuts against the contact, the micro switch (12) closes and causes the electromagnetic mechanism (11) to be linked to maintain power supply, thereby attracting the fire extinguisher lid (200).

3. The automatic fire extinguishing device according to claim 1, characterized in that: The distance between the center of the receiving groove (110) and the vertical direction of the top of the stove head (21) is L2; The distance between the top of the stove head (21) and the lowest point of the fire extinguisher lid (200) after it falls is L3; The vertical section (320) of the rope (300) is L2-L3.

4. The automatic fire extinguishing device according to claim 3, characterized in that: It also includes a limiting block (13), which is disposed on the smoke baffle (23). One end of the rope (300) is connected to the limiting block (13), and the other end passes through the center hole (111) of the receiving groove (110) and is connected to the fire extinguisher lid (200). The rope (300) also includes a horizontal segment (310) from the limiting block (13) to the center of the receiving groove (110), the length of the horizontal segment (310) being L1; The total length of the rope (300) is L = L1 + L2 - L3.

5. The automatic fire extinguishing device according to claim 4, characterized in that: It also includes a shaft support (400); The shaft support (400) includes a rotating shaft (410) and a bracket (420). The bracket (420) is disposed in the center hole (111) of the receiving groove (110). The rotating shaft (410) is flush with the center hole (111) of the receiving groove (110). The rope (300) passes around the surface of the rotating shaft (410) and through the center hole (111) before being connected to the fire extinguisher lid (200).

6. The automatic fire extinguishing device according to claim 1, characterized in that: At least one boss (120) is provided on the bottom of the receiving groove (110), the boss (120) extends toward the opening of the receiving groove (110); and a countersunk hole (122) is provided on the side of the boss (120) away from the receiving groove (110), the opening of the countersunk hole (122) is away from the stove head (21); the electromagnetic mechanism (11) is disposed in the countersunk hole (122); When the electromagnetic mechanism (11) is energized, the fire extinguisher lid (200) is attracted to the boss (120) in the receiving groove (110).

7. The automatic fire extinguishing device according to claim 1, characterized in that: The storage box (100) is connected to the smoke baffle (23); along the direction of the surface of the smoke baffle (23), the storage box (100) is telescopically disposed inside the smoke baffle (23).

8. The automatic fire extinguishing device according to claim 7, characterized in that: It also includes a guide rail (510) and a telescopic mechanism (520); the guide rail (510) is disposed on the smoke baffle (23), and the storage box (100) is slidably engaged with the guide rail (510); the fixed end of the telescopic mechanism (520) is connected to the smoke baffle (23), and the telescopic end of the telescopic mechanism (520) is connected to the storage box (100) to drive the storage box (100) to move closer to or away from the smoke baffle (23).

9. The automatic fire extinguishing device according to claim 7, characterized in that: It also includes a drive mechanism, a gear, and a rack; the gear is disposed on the smoke baffle (23), and the rack is disposed on the storage box (100); or the gear is disposed on the storage box (100), and the rack is disposed on the smoke baffle (23); the gear meshes with the rack; the drive mechanism is connected to the gear to drive the gear to rotate, thereby causing the storage box (100) to move closer to or further away from the smoke baffle (23).

10. An integrated stove, characterized in that: The automatic fire extinguishing device includes any one of claims 1-9.

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