A burner head assembly, a combustion device and a gas hob

Abstract

The utility model belongs to combustion technical field, specifically discloses a kind of furnace head assembly, combustion device and gas cooking utensil.Furnace head assembly includes hearth and lifting assembly.Hearth has central ejection passage and vertically arranged central vent pipe, and the outlet end of central ejection passage is communicated with the lower end of central vent pipe;Lifting assembly includes lifting sleeve and rotating piece, lifting sleeve is slidably sleeved on the outside of central vent pipe and upper end is not lower than the upper end of central vent pipe, and the upper end of lifting sleeve is used to install central burner, rotating piece is rotatably hinged to hearth about horizontal axis, and rotating piece has counterweight portion and push portion respectively located on the opposite sides of horizontal axis, and the upper side of push portion is in contact with lifting sleeve, and counterweight portion is used to always exert the moment of force that makes push portion have upward movement tendency.The utility model can guarantee that the flame at central burner is attached to cooking utensil, and improve the use reliability and use experience of combustion device.

Description

Technical Field

[0001] This utility model relates to the field of combustion technology, and in particular to a burner assembly, combustion device and gas stove. Background Technology

[0002] The burner heats the cooking appliance by igniting and burning gas. It is usually equipped with an inner ring burner cap and an outer ring burner cap that is spaced out from the outside of the inner ring burner cap. When cooking on low heat, there is a flame only at the fire hole of the inner ring burner cap. When cooking on high heat, there is a flame at both the inner and outer ring burner caps.

[0003] The prior art provides a burner including a base, a central burner cap, and an outer ring burner cap. The central burner cap is spring-loaded and resiliently connected to the base in a vertical direction. When a cooking utensil is placed on the central burner cap, the weight of the utensil presses down on the spring, causing the utensil to move downwards until it is simultaneously supported by the central burner cap and the pot rack. When the cooking utensil detaches from the central burner cap, the central burner cap springs back upwards under the elastic force of the spring, returning the central burner cap to a position higher than the outer ring burner cap.

[0004] Existing burners, by using a spring connecting the base and the central burner cap, ensure that the upper end of the central burner cap always contacts the cooking appliance during use. This allows the flame from the central burner cap to adhere closely to the bottom of the appliance, guaranteeing effective heating, especially when only the central burner cap is in use. However, because burners generate high temperatures during operation, the elasticity and lifespan of the spring are easily affected by high temperatures, leading to spring failure over prolonged use and compromising the burner's reliability. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a burner head assembly that can effectively solve the problem that the performance of the spring in the existing combustion device is easily affected by high temperature due to the use of springs to raise and lower the center burner cap, which leads to a decrease in the reliability of the combustion device in the long term.

[0006] The second technical problem solved by this utility model is to provide a combustion device that can effectively solve the problem that the performance of the spring in the existing combustion device is easily affected by high temperature due to the use of a spring to lift the center burner cap, which leads to a decrease in the reliability of the combustion device during long-term use.

[0007] The third technical problem solved by this utility model is to provide a gas stove that can effectively solve the problem of reduced reliability and user experience of gas stoves due to the long-term performance degradation of the combustion device.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A burner assembly, comprising:

[0010] The furnace base has a central ejector channel and a vertically arranged central vent pipe, wherein the outlet end of the central ejector channel is connected to the lower end of the central vent pipe;

[0011] The lifting assembly includes a lifting sleeve and a rotating component. The lifting sleeve is slidably sleeved on the outside of the central vent pipe and its upper end is higher than the upper end of the central vent pipe. The upper end of the lifting sleeve is used to install a central burner. The rotating component is rotatably hinged to the furnace base around a horizontal axis. The rotating component has a counterweight and a pushing part located on opposite sides of the horizontal axis. The upper side of the pushing part abuts against the lifting sleeve.

[0012] Compared with the prior art, the burner assembly of this utility model has the following advantages: by setting a rotating part with a pushing part and a counterweight part, and a lifting sleeve that cooperates with the pushing part, the upper end of the lifting sleeve is used to install the center burner. Since the counterweight part applies a torque with an upward tendency to move to the pushing part, when there is no cooking appliance at the center burner, the pushing part tilts upward under the action of the torque applied by the counterweight part, thereby keeping the lifting sleeve at a position where the center burner cap is higher than the outer ring burner cap. When there is a cooking appliance at the center burner, the cooking appliance drives the rotating part to rotate through the downward force applied to the pushing part by the lifting sleeve, thereby realizing the descent of the lifting sleeve. The rotating part uses the lever principle to realize the lifting and lowering setting of the lifting sleeve. The structure has strong stability, high reliability, and the lifting performance is not affected by high temperature. It is durable and can better guarantee the long-term performance of the lifting structure, thereby ensuring the long-term performance of the burner assembly and the combustion device.

[0013] In one embodiment, the rotating member includes a rod-shaped body hinged to the furnace base, a counterweight connected to a first end of the rod-shaped body, and a second end of the rod-shaped body having the pushing portion.

[0014] In one embodiment, the rod-shaped body includes a lever portion and a push rod portion connected at an obtuse angle, the connection between the lever portion and the push rod portion is hinged to the furnace base, and the end of the lever portion away from the push rod portion is connected to the counterweight portion;

[0015] The lifting sleeve can slide between a first position and a second position, the first position being higher than the second position. When the lifting sleeve is in the first position, in the projection plane perpendicular to the horizontal axis, the projection of the push rod portion extends upward in a direction away from the lever portion.

[0016] In one embodiment, when the lifting sleeve is in the first position, the lever portion is horizontally positioned or extends downward at an angle away from the horizontal axis, and the angle between the lever portion and the horizontal plane is less than 30°.

[0017] In one embodiment, the push rod portion includes a main rod portion arranged in a U-shape, C-shape, or arc shape, with the push portion at both ends of the main rod portion, and a connecting rod portion connected to the middle of the main rod portion, the connecting rod portion being connected to the lever portion at an angle.

[0018] In one embodiment, the pushing part has a pushing arc surface that abuts against the lifting sleeve.

[0019] In one embodiment, the lifting sleeve includes a main cylinder portion, and the side wall of the main cylinder portion is provided with an abutting protrusion protruding outward, and the upper side of the abutting part abuts against the lower side of the abutting protrusion.

[0020] In one embodiment, the furnace base has a lifting slide cavity surrounding the central vent pipe, the lifting slide cavity extending through the upper end of the furnace base, the lifting sleeve being slidably inserted into the lifting slide cavity, and the side wall of the lifting slide cavity having an avoidance hole, the abutting protrusion passing through the avoidance hole to abut against the pushing part.

[0021] In one embodiment, the upper end of the furnace base is provided with an upper notch, and the abutting protrusion is correspondingly provided with the upper notch; the lifting sleeve can slide between a first position and a second position, the first position being higher than the second position, and an upper limit member is installed on the upper end of the furnace base. When the lifting sleeve is in the first position, the upper end of the abutting protrusion is accommodated in the upper notch, and the upper limit member abuts against the abutting protrusion.

[0022] In one embodiment, the furnace base includes a top plate portion, a first boss portion protruding from the lower side of the top plate portion, and a central ejector tube portion connected to the lower end of the first boss portion. The inner cavity of the central ejector tube portion forms the central ejector channel. The central vent pipe is located inside the first boss portion. The first boss portion has the lifting slide cavity and the clearance hole. The rotating member is hinged to the lower side of the top plate portion.

[0023] In one embodiment, one abutting protrusion is provided on each of the opposite sides of the main cylinder portion, the rotating component surrounds the main rod portion, the main rod portion and the counterweight portion are respectively located on opposite sides of the horizontal axis, the main rod portion is C-shaped, U-shaped or arc-shaped, the main rod portion surrounds the outside of the first protrusion portion and has the abutting portion at both ends, and the two abutting portions abut against the two abutting protrusions respectively.

[0024] In one embodiment, the furnace base includes a main body having a central ejector channel and a vertically arranged mounting hole. The lower end of the mounting hole is connected to the gas outlet end of the central ejector channel, and the lower end of the central vent pipe is inserted into the mounting hole.

[0025] The second technical problem mentioned above is solved by the following technical solution:

[0026] A combustion device includes a central burner and a main burner spaced outside the central burner, and also includes a burner assembly as described above. The central burner is installed at the upper end of the lifting sleeve, and the main burner is installed at the upper end of the stove base. When the central burner is not carrying a cooking appliance, the central burner is higher than the main burner.

[0027] Compared with the prior art, the combustion device of this utility model has the following advantages: by adopting the above-mentioned burner assembly, the height of the central burner can be adjusted, so that the flame at the central burner can be close to the bottom of the cooking appliance, thereby improving the thermal efficiency of the combustion device; at the same time, the lifting stability of the central burner lifting structure is not affected by high temperature, effectively ensuring the reliability and long-term performance of the combustion device.

[0028] The third technical problem mentioned above is solved by the following technical solution:

[0029] A gas stove, including a burner as described above.

[0030] Compared with the prior art, the gas stove of this utility model has the following advantages: by adopting the above-mentioned combustion device, the long-term reliability of the gas stove can be guaranteed and the user experience of the gas stove can be improved. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the combustion device provided in an embodiment of the present invention from one perspective;

[0032] Figure 2 A schematic diagram of the combustion device provided in an embodiment of this utility model from another perspective;

[0033] Figure 3 This is a schematic diagram of the disassembled structure of the combustion device provided in an embodiment of the present utility model;

[0034] Figure 4 A cross-sectional view of the combustion device provided in an embodiment of this utility model;

[0035] Figure 5 for Figure 4 A magnified view of a section at point I;

[0036] Figure 6 A schematic diagram of the furnace base provided in an embodiment of this utility model;

[0037] Figure 7 This is a schematic diagram of the structure of the main body provided in an embodiment of the present utility model;

[0038] Figure 8 This is a schematic diagram of the structure of the lifting sleeve provided in an embodiment of the present utility model;

[0039] Figure 9 A partial cross-sectional view of the combustion device provided in an embodiment of this utility model;

[0040] Figure 10 A schematic diagram of the structure of the rotating component provided in the embodiment of the utility model;

[0041] Figure 11 This is a partial structural schematic diagram of the burner assembly provided in an embodiment of the present utility model.

[0042] Label Explanation:

[0043] 100. Burner head assembly; 200. Center burner; 300. Main burner; 301. Gas distribution seat; 302. Outer ring burner cap; 303. Middle ring burner cap;

[0044] 1. Lifting assembly; 11. Lifting sleeve; 111. Main cylinder; 112. Convex ring; 113. Abutting protrusion; 12. Rotating component; 121. Lever; 122. Push rod; 1221. Main rod; 1222. Pushing part; 1223. Connecting rod; 123. Counterweight; 124. Hinge; 13. Hinge shaft;

[0045] 2. Furnace base; 21. Main body; 211. Top plate; 2111. Upper notch; 212. First boss; 2121. Lifting slide cavity; 2122. Clearance hole; 213. Second boss; 214. Central ejector tube; 2141. Central ejector channel; 215. Main ejector tube; 215a. Outer ring ejector tube; 215b. Middle ring ejector tube; 216. Fixed support leg; 217. Hinge seat; 2171. Connecting seat; 2172. Ear plate; 218. Mounting boss; 219. Connecting plate; 22. Central vent pipe;

[0046] 3. Upper limit component; 31. Limiting plate part; 32. Surrounding part; 33. Recessed part. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] This embodiment provides a combustion device that can be applied to gas stoves to improve the performance of the combustion device and enhance the cooking experience of the gas stove.

[0052] like Figures 1 to 4 As shown, in this embodiment, the combustion device includes a burner assembly 100, a central burner 200, and a main burner 300. The burner assembly 100 has a central gas passage and a main gas passage; the central burner 200 is installed at the upper end of the burner assembly 100 and has a central flame hole; the main burner 300 is installed on the burner assembly 100 and coaxially spaced outside the central burner 200; the outer ring flame cap 302 has a main flame hole; the central gas passage supplies gas to the central flame hole of the central burner 200; and the main gas passage supplies gas to the main flame hole of the main burner 300.

[0053] In this embodiment, the burner assembly 100 includes a furnace base 2 and a lifting assembly 1. The furnace base 2 has a central ejector channel 2141 and a vertically arranged central vent pipe 22. The outlet end of the central ejector channel 2141 communicates with the lower end of the inner cavity of the central vent pipe 22, so that the central ejector channel 2141 and the inner cavity of the central vent pipe 22 together form a central gas passage. The furnace base 2 also has a main gas passage. The lifting assembly 1 includes a lifting sleeve 11 and a rotating component 12. The lifting sleeve 11 is slidably sleeved on the outside of the central vent pipe 22, and its upper end is used to install a central burner 200. The rotating component 12 is rotatably hinged to the furnace base 2 around a horizontal axis and has a counterweight 123 and a pushing part 1222 located on both sides of the horizontal axis. The upper side of the pushing part 1222 abuts against the lifting sleeve 11.

[0054] The lifting sleeve 11 can slide between a first position and a second position, with the first position being higher than the second position. When the pressure acting on the upper end of the lifting sleeve 11 is less than the preset pressure, the lifting sleeve 11 can maintain the first position under the gravity of the counterweight 123. When the pressure acting on its upper end is greater than the preset pressure, the lifting sleeve 11 can push the rotating member 12 downward to rotate, so that the lifting sleeve 11 can descend and reach the second position.

[0055] The center burner 200 is installed at the upper end of the lifting sleeve 11, and the main burner 300 is installed at the upper end of the furnace base 2. When the lifting sleeve 11 is in the first position, the burner assembly 100 is in the first support state, and the height of the upper end of the central burner 200 is higher than the height of the main burner 300. When the cooking appliance is placed on the central burner 200, the pressure acting on the upper end of the lifting sleeve 11 increases, which in turn increases the pressure applied by the lifting sleeve 11 to the pushing part 1222. Since the rotating part 12 is hinged to the stove base 2 and has a counterweight part 123 and a pushing part 1222 respectively at both ends, when the downward pressure on the pushing part 1222 increases, the torque generated at the pushing part 1222 increases, which drives the rotating part 12 to rotate, and then the lifting sleeve 11 descends until the cooking appliance can be supported on the central burner 200 and the pot rack of the gas stove. That is, the lifting sleeve 11 reaches the second position. The central burner 200 can always be in contact with the cooking appliance, ensuring that when only the flame at the central burner 200 is burning, the flame at the central burner 200 can be attached to the bottom of the cooking appliance, improving heat utilization and reducing heat loss.

[0056] That is, in this embodiment, when there is no cooking appliance in the central burner 200, the lifting sleeve 11 is held in the first position by the counterweight 123. When there is a cooking appliance in the central burner 200, the cooking appliance drives the rotating part 12 to rotate through the downward force applied to the pushing part 1222 by the lifting sleeve 11, so as to realize the lowering of the lifting sleeve 11. The rotating part 12 realizes the lifting and lowering setting of the lifting sleeve 11 by lever principle. The structure is stable, reliable and the lifting performance is not affected by high temperature. It is durable and can better guarantee the long-term performance of the lifting structure, thereby ensuring the long-term performance of the burner assembly 100 and the combustion device.

[0057] In one embodiment, the main burner 300 includes a gas distribution seat 301, an outer ring burner cap 302, and a middle ring burner cap 303. The gas distribution seat 301 is installed on the upper end of the burner head assembly 100. The gas distribution seat 301 has an annular outer ring gas distribution chamber and a middle ring gas distribution chamber, with the outer ring gas distribution chamber spaced apart outside the middle ring gas distribution chamber. The middle ring burner cap 303 and the outer ring burner cap 302 are both installed on the gas distribution seat 301, with the middle ring burner cap 303 located between the outer ring burner cap 302 and the central burner cap. The main burner holes include an outer ring burner hole on the outer ring burner cap 302 and a middle ring burner hole in the middle ring burner cap 303. There are two main gas passages, namely an outer ring gas passage and a middle ring gas passage. The middle ring gas passage communicates with the middle ring gas distribution chamber, and the outer ring gas passage communicates with the outer ring gas distribution chamber. The outer ring gas distribution chamber is used to supply gas to the outer ring burner holes, and the middle ring gas distribution chamber is used to supply gas to the middle ring burner holes. This configuration allows the combustion device to have a central flame, a middle ring flame, and an outer ring flame, thereby further improving the heating uniformity of the cooking appliances and enhancing the cooking experience.

[0058] In another embodiment, the main burner 300 may consist only of a gas distribution seat 301 and an outer ring flame cap 302; in yet another embodiment, a gas distribution structure may be integrated at the upper end of the furnace base 2, and the main burner 300 may consist only of an outer ring flame cap 302 or both an outer ring flame cap 302 and a middle ring flame cap 303. The specific structure of the main burner 300 and the cooperation structure between the main burner 300 and the furnace base 2 can be set with reference to the prior art, which is not the focus of this utility model and will not be described in detail here.

[0059] In one embodiment, the furnace base 2 includes a main base body 21, which is separately disposed from the central vent pipe 22. The main base body 21 is provided with a central ejector channel 2141 and a main gas passage. The lower end of the central vent pipe 22 is sealed and inserted into the main base body 21 and communicates with the gas outlet end of the central ejector channel 2141. By separating the main base body 21 and the central vent pipe 22, the processing difficulty of the main base body 21 can be reduced, and the replacement of the central vent pipe 22 can be facilitated, avoiding damage to the central vent pipe 22 due to wear.

[0060] To facilitate the installation of the central vent pipe 22, a vertically oriented mounting hole is provided on the main body 21. The lower end of the mounting hole connects to the air outlet of the central ejector channel 2141, and the lower end of the central vent pipe 22 is inserted into the mounting hole. The lower end of the central vent pipe 22 can be threaded into the wall of the mounting hole, and the gap can be sealed by a sealing ring placed between them. Alternatively, the central vent pipe 22 and the mounting hole can be interference-fitted, as long as the lower end of the central vent pipe 22 is securely inserted into the mounting hole and the connection between the central vent pipe 22 and the main body 21 is sealed.

[0061] like Figures 5 to 7 As shown, in one embodiment, the main body 21 includes a top plate portion 211 and a first boss portion 212 and a second boss portion 213 protruding from the lower side of the top plate portion 211. One side of the first boss portion 212 is connected to a central ejector tube portion 214, and one side of the second boss portion 213 is connected to a main ejector tube portion 215. The inner cavity of the central ejector tube portion 214 forms a central ejector channel 2141, and the inner cavity of the main ejector tube portion 215 forms a main ejector channel portion. The first boss portion 212 has a mounting hole, and the lifting sleeve 11 is slidably mounted on the first boss portion 212. A main venting chamber is provided in the second boss portion 213. The upper end of the main venting chamber penetrates the top plate portion 211, and the lower end communicates with the main ejector channel. The main ejector channel and the main venting chamber cooperate to form a main gas passage. The main ejector tube portion 215 and the second boss portion 213 are each corresponding to a main gas passage. The upper end of the top plate 211 is provided with a mounting boss 218 that mates with the air distribution seat 301.

[0062] The rotating component 12 is mounted on the lower side of the top plate portion 211 and located outside the first boss portion 212 and the second boss portion 213. This arrangement facilitates the provision of space for the installation of the rotating component 12, improves the ease of installation and disassembly of the rotating component 12, and reduces structural interference between the rotating component 12 and the main body 21. Furthermore, the counterweight portion 123 is located on the side of the first boss portion 212 away from the central ejector portion 214, and the pushing portion 1222 is located between the first boss portion 212 and the second boss portion 213, providing sufficient space for the rotation of the rotating component 12 and effectively avoiding interference between the rotating component 12 and the main body 21.

[0063] In one embodiment, two main ejector tube sections 215 are provided, namely an outer ring ejector tube section 215a and a middle ring ejector tube section 215b. The two main ejector tube sections 215 and the central ejector tube section 214 are arranged side by side along a first direction, that is, the first boss section 212 and the two second boss sections 213 are arranged side by side along the first direction. In other embodiments, only one main ejector tube section 215 may be provided.

[0064] Furthermore, the main body 21 also includes a connecting plate portion 219, which is vertically arranged and its upper end is connected to the top plate portion 211. The gas outlet ends of the main ejector tube portion 215 and the central ejector tube portion 214 are connected to one side of the connecting plate portion 219, and the first boss portion 212 and the second boss portion 213 are connected to the other opposite side of the connecting plate portion 219, thereby enhancing the overall structural stability and reliability of the main body 21. A fixed support leg 216 is also connected to the top plate portion 211, with at least one fixed support leg 216 on each opposite side of the top plate portion 211. The fixed support leg 216 is connected to the bottom shell of the gas stove.

[0065] To improve the lifting reliability of the lifting sleeve 11, in one embodiment, a lifting slide cavity 2121 is provided on the main seat 21. A mounting hole is provided at the bottom of the lower end of the lifting slide cavity 2121. The lifting sleeve 11 is slidably inserted into the lifting slide cavity 2121, and the upper end of the lifting sleeve 11 is higher than the main seat 21. This allows the lifting slide cavity 2121 to guide the lifting of the lifting sleeve 11 and also to shield part of the lifting sleeve 11's structure, thus improving the reliability of the lifting sleeve 11. Specifically, the lifting slide cavity 2121 is provided inside the first boss portion 212. Preferably, the upper end of the central vent pipe 22 is higher than the upper end of the main seat 21 to increase the mating length between the lifting sleeve 11 and the central vent pipe 22, thereby improving the lifting stability of the lifting sleeve 11.

[0066] like Figure 5 , Figure 6 Hehe Figure 8 As shown, the lifting sleeve 11 includes a vertically arranged main sleeve portion 111. A protruding ring portion 112 is provided on a portion of the main sleeve portion 111. The protruding ring portion 112 is slidably inserted into the lifting slide cavity 2121 to reduce the friction between the lifting sleeve 11 and the main seat 21 and improve the smoothness of the sliding of the lifting sleeve 11. The upper outer wall of the main sleeve portion 111 is provided with an external thread, and the central burner 200 is threaded onto the upper end of the main sleeve portion 111.

[0067] To improve the reliability of the fit between the lifting sleeve 11 and the rotating component 12, abutment protrusions 113 are provided on the main cylinder portion 111, with the upper side of the pushing portion 1222 abutting against the lower side of the abutment protrusion 113. This ensures stable contact between the lifting sleeve 11 and the pushing portion 1222, thereby improving the stability and reliability of the fit between the lifting sleeve 11 and the rotating component 12. In one embodiment, two abutment protrusions 113 are provided opposite to each other and spaced apart, and the pushing portion 1222 is provided in a one-to-one correspondence with the abutment protrusions 113 to enhance the force balance of the lifting sleeve 11, thereby improving the operational stability of the lifting sleeve 11.

[0068] The abutting protrusion 113 is preferably located at the lower end of the main cylinder portion 111, so that the pushing portion 1222 can be positioned lower, thereby avoiding interference between the lifting assembly 1 and other structures above the furnace base 2, and also preventing the counterweight portion 123 from rising to contact the upper stove panel or other structures. Furthermore, the abutting protrusion 113 is provided outwardly on the convex ring portion 112 to simplify the structure and reduce the processing difficulty of the main sleeve.

[0069] In one embodiment, the upper end of the furnace base 2 is provided with an upper notch 2111, and the abutment protrusion 113 is correspondingly provided with the upper notch 2111. An upper limit member 3 is installed on the upper end of the furnace base 2. When the lifting sleeve 11 is in the first position, the upper end of the abutment protrusion 113 is accommodated in the upper notch 2111, and the upper limit member 3 abuts against the abutment protrusion 113. Specifically, the top plate 211 is provided with an upper notch 2111. By setting the upper limit member 3 on the upper end of the furnace base 2, the ease of disassembly and assembly of the upper limit member 3 can be improved, thereby improving the ease of disassembly and assembly of the lifting sleeve 11 and the central ventilation pipe 22.

[0070] The upper limit member 3 includes a limiting plate portion 31, which has a through hole for the main cylinder portion 111 of the lifting sleeve 11 to pass through. The projection of the limiting boss on the limiting plate portion 31 is at least partially located inside the limiting plate portion 31. The limiting plate portion 31 abuts against the upper end face of the main seat 21 to improve the reliability of the upper limit member 3 in assembly and disassembly. The wall of the through hole is folded upward to form a surrounding edge portion 32. In other embodiments, the upper limit member 3 may also be a retaining ring that is locked inside the lifting slide cavity 2121.

[0071] To improve the disassembly and assembly performance of the upper limit member 3, the limiting plate portion 31 is partially recessed to form a recessed portion 33, and the top plate portion 211 is provided with a countersunk threaded hole. The recessed portion 33 is accommodated in the countersunk threaded hole and is provided with a through hole that is directly opposite to the countersunk threaded hole. The upper limit member 3 and the top plate portion 211 are fastened by fasteners that pass through the through hole and the countersunk threaded hole.

[0072] The main body 21 is also provided with a lower limit component, which abuts against the lifting sleeve 11 to limit the lifting sleeve 11 from continuing to move downward, that is, to limit the lowest position of the lifting sleeve 11. In one embodiment, the lower limit component is formed at the bottom of the lifting slide cavity 2121, thereby simplifying the structure and reducing costs.

[0073] In one embodiment, the cavity wall of the lifting slide cavity 2121 is provided with a clearance hole, and the abutment protrusion 113 is slidably inserted into the clearance hole to provide clearance for the operation of the abutment protrusion 113. At the same time, this arrangement also allows the rotating member 12 to be located outside the lifting slide cavity 2121, thereby reducing the difficulty of installing the rotating member 12 on the main body 21. The abutment protrusion 113 is at least partially located on the lower side of the top plate portion 211, so that the rotating member 12 is located entirely on the lower side of the top plate portion 211, which facilitates the installation of the rotating member 12 and improves the ease of cooperation between the pushing part 1222 and the abutment protrusion 113.

[0074] like Figures 9 to 11 As shown, in one embodiment, the rotating component 12 includes a rod-shaped main body hinged to the furnace base 2, a counterweight 123 connected to the first end of the rod-shaped main body, and a pushing portion 1222 at the second end of the rod-shaped main body. By setting the main structure of the rotating component 12 as a rod-shaped structure, it is beneficial to reduce the overall footprint and weight of the rotating component 12, thereby improving the structural compactness of the combustion device, reducing the weight of the combustion device, and lowering the cost of the combustion device. In other embodiments, the rotating component 12 may also be partially a plate-shaped structure.

[0075] In one embodiment, the rod-shaped main body includes a lever portion 121 and a push rod portion 122 connected at an obtuse angle. The connection between the lever portion 121 and the push rod portion 122 is hinged to the stove base 2. The end of the lever portion 121 away from the push rod portion 122 is connected to a counterweight portion 123. When the lifting sleeve 11 is in the first position, in a projection plane perpendicular to the horizontal axis, the projection of the push rod portion 122 extends upward at an angle away from the lever portion 121. This arrangement facilitates the downward pressing of the push rod portion 122 when the cooking appliance is placed on the central burner 200, thereby raising the counterweight portion 123 and improving the smoothness of the lifting and lowering of the lifting sleeve 11.

[0076] In one embodiment, when the lifting sleeve 11 is in the first position, the lever portion 121 is horizontally positioned or extends downward at an angle away from the horizontal axis, with the angle between the lever portion 121 and the horizontal plane being less than 30°. This configuration allows the counterweight portion 123 to generate the largest possible rotational torque at the hinge axis 13 while maintaining the same length of the lever portion 121. This ensures the lifting sleeve 11 can stably reach the first position while preventing the counterweight portion 123 from rising to a higher position and colliding with the cooktop panel when the lifting sleeve 11 descends. When the lifting sleeve 11 is in the first position, the angle between the lever portion 121 and the horizontal plane can be, but is not limited to, 5°, 8°, 12°, 15°, 18°, 22°, 25°, 27°, or 30°.

[0077] The push rod portion 122 includes a main rod portion 1221 arranged in a U-shape, C-shape, or arc shape. Both ends of the main rod portion 1221 have push portions 1222, and a connecting rod portion 1223 is connected to the middle of the main rod portion 1221. The connecting rod portion 1223 is connected to the lever portion 121 at an angle. This arrangement facilitates the provision of two push portions 1222 along the rotating section, thereby ensuring the stability and reliability of the push of the rotating component 12 against the lifting sleeve 11. Simultaneously, the U-shape, C-shape, or arc shape of the main rod portion 1221 helps avoid localized stress concentration at the main rod portion 1221, improving the overall stress stability of the push rod portion 122. The connecting rod portion 1223 facilitates the connection between the connecting rod portion 1223 and the lever portion 121.

[0078] Specifically, the main body rod 1221 surrounds the outside of the first boss 212, and the two pushing parts 1222 respectively abut against the two abutting protrusions 113. This shape of the main body rod 1221 also facilitates the avoidance of the rotating part 12 from the first boss 212.

[0079] In one embodiment, the pushing part 1222 has a pushing arc surface that abuts against the lifting sleeve 11. By providing the pushing arc surface, it is possible to avoid large friction between the rotating part 12 and the lifting sleeve 11 when they rotate, ensuring that the rotating part 12 and the lifting sleeve 11 are in point contact or line contact, thereby ensuring the smooth operation of the rotating part 12 and the lifting sleeve 11.

[0080] In one embodiment, a hinge seat 217 is provided on the back side of the top plate portion 211, and the rotating member 12 is hinged to the hinge seat 217 to improve the ease of installation of the rotating member 12 on the main body 21. The hinge seat 217 includes a connecting seat portion 2171 and two ear plate portions 2172 that are opposite to each other and spaced apart. The connecting seat portion 2171 is connected to the top plate portion 211, and the rotating member 12 is partially located between the two ear plate portions 2172. The rotating member 12 and the hinge seat 217 are connected by a hinge shaft 13 that passes through the two ear plate portions 2172 and the rotating member 12.

[0081] One side of the hinge seat 217 is connected to the outer wall of the first boss portion 212 to enhance the overall structural strength of the hinge seat 217 and reduce the probability of deformation of the hinge seat 217. A clearance groove is provided on the side of the hinge seat 217 near the first boss portion 212 to provide clearance for the movement of the rotating member 12.

[0082] The rotating member 12 has a hinge portion 124 connecting the lever portion 121 and the push rod portion 122. Both sides of the hinge portion 124 are flat, and the flat surfaces abut against the ear plate portion 2172, thereby restricting the axial movement of the rotating member 12 along the hinge axis 13.

[0083] In one embodiment, the rotating component 12 is integrally formed to ensure the overall structural strength and rigidity of the rotating component 12. In other embodiments, the counterweight 123 and the rod-shaped body can also be welded or detachably connected.

[0084] This embodiment also provides a gas stove, including the combustion device described above. By employing the combustion device, the long-term reliability of the gas stove can be guaranteed, and the user experience of the gas stove can be improved.

[0085] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0086] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A burner head assembly, characterized in that, include: The furnace base (2) has a central ejector channel (2141) and a vertically arranged central vent pipe (22), the gas outlet end of the central ejector channel (2141) is connected to the lower end of the central vent pipe (22); The lifting assembly (1) includes a lifting sleeve (11) and a rotating component (12). The lifting sleeve (11) is slidably sleeved on the outside of the central vent pipe (22) and its upper end is not lower than the upper end of the central vent pipe (22). The upper end of the lifting sleeve (11) is used to install the central burner (500). The rotating component (12) is rotatably hinged to the furnace base (2) about a horizontal axis. The rotating component (12) has a counterweight (123) and a pushing part (1222) located on opposite sides of the horizontal axis. The upper side of the pushing part (1222) abuts against the lifting sleeve (11). The counterweight (123) is used to always apply a torque that makes the pushing part (1222) have an upward tendency.

2. The burner assembly according to claim 1, characterized in that, The rotating component (12) includes a rod-shaped body that is hinged to the furnace base (2), a counterweight (123) that is connected to the first end of the rod-shaped body, and a second end of the rod-shaped body that has the pushing part (1222).

3. The burner assembly according to claim 2, characterized in that, The rod-shaped main body includes a lever part (121) and a push rod part (122) connected at an obtuse angle. The connection between the lever part (121) and the push rod part (122) is hinged to the furnace base (2). The end of the lever part (121) away from the push rod part (122) is connected to the counterweight part (123). The lifting sleeve (11) can slide between a first position and a second position, the first position being higher than the second position. When the lifting sleeve (11) is in the first position, in the projection plane perpendicular to the horizontal axis, the projection of the push rod (122) extends upward in a direction away from the lever (121).

4. The burner assembly according to claim 3, characterized in that, When the lifting sleeve (11) is in the first position, the lever part (121) is horizontally positioned or extends downward at an angle away from the horizontal axis, and the angle between the lever part (121) and the horizontal plane is less than 30°.

5. The burner assembly according to claim 3, characterized in that, The push rod (122) includes a main rod (1221) arranged in a U-shape, C-shape or arc shape. Both ends of the main rod (1221) have the push part (1222). A connecting rod (1223) is connected to the middle of the main rod (1221). The connecting rod (1223) is connected to the lever (121) at an angle.

6. The burner assembly according to claim 1, characterized in that, The pushing part (1222) has a pushing arc surface, which abuts against the lifting sleeve (11).

7. The burner assembly according to any one of claims 1-6, characterized in that, The lifting sleeve (11) includes a main cylinder (111), and the side wall of the main cylinder (111) is provided with an abutting protrusion (113) protruding outward. The upper side of the pushing part (1222) abuts against the lower side of the abutting protrusion (113).

8. The burner assembly according to claim 7, characterized in that, The furnace base (2) has a lifting slide cavity (2121) arranged around the central vent pipe (22). The lifting slide cavity (2121) passes through the upper end of the furnace base (2). The lifting sleeve (11) is slidably inserted into the lifting slide cavity (2121). The side wall of the lifting slide cavity (2121) is provided with a clearance hole (2122). The abutting protrusion (113) passes through the clearance hole (2122) to abut against the pushing part (1222).

9. The burner assembly according to claim 8, characterized in that, The upper end of the furnace base (2) is provided with an upper notch (2111), and the abutting protrusion (113) is provided correspondingly to the upper notch (2111); The lifting sleeve (11) can slide between a first position and a second position, the first position being higher than the second position. An upper limit member (3) is installed on the upper end of the furnace base (2). When the lifting sleeve (11) is in the first position, the upper end of the abutting protrusion (113) is accommodated in the upper notch (2111), and the upper limit member (3) abuts against the abutting protrusion (113).

10. The burner assembly according to claim 8, characterized in that, The furnace base (2) includes a top plate (211), a first boss (212) protruding from the lower side of the top plate (211), and a central ejector tube (214) connected to the lower end of the first boss (212). The inner cavity of the central ejector tube (214) forms the central ejector channel (2141). The central vent pipe (22) is located inside the first boss (212). The first boss (212) has the lifting slide cavity (2121) and the clearance hole (2122). The rotating member (12) is hinged to the lower side of the top plate (211).

11. The burner assembly according to claim 10, characterized in that, The abutting protrusion (113) is provided on each of the opposite sides of the main cylinder (111). The rotating member (12) surrounds the main rod (1221). The main rod (1221) and the counterweight (123) are located on opposite sides of the horizontal axis. The main rod (1221) is C-shaped, U-shaped or arc-shaped. The main rod (1221) surrounds the outside of the first boss (212) and has the abutting part (1222) at both ends. The two abutting parts (1222) abut against the two abutting protrusions (113) respectively.

12. The burner assembly according to any one of claims 1-6, characterized in that, The furnace base (2) includes a main body (21), which has a central ejector channel (2141) and a vertically arranged mounting hole. The lower end of the mounting hole is connected to the gas outlet end of the central ejector channel (2141), and the lower end of the central vent pipe (22) is inserted into the mounting hole.

13. A combustion device, comprising a central burner (500) and a main burner (300) spaced outside the central burner (500), characterized in that, It also includes the burner assembly as described in any one of claims 1-12, wherein the center burner (500) is mounted on the upper end of the lifting sleeve (11), and the main burner (300) is mounted on the upper end of the stove base (2); when the center burner (500) is not carrying a cooking appliance, the center burner (500) is higher than the main burner (300).

14. A gas stove, characterized in that, Including the burner as described in claim 13.

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