Combustor and gas stove

Abstract

The utility model discloses a burner which is provided with an inner fire burning part provided with inner fire holes, an outer fire burning part surrounding the inner fire burning part and provided with outer fire holes, and an extremely-low fire gas pipe, and the center of the inner fire burning part is provided with an extremely-low fire burning part. The tiny fire gas pipe extends into the combustor and is connected with the tiny fire combustion part, and tiny fire holes communicated with the tiny fire gas pipe are formed in the tiny fire combustion part. The utility model further discloses a gas stove. The burner has the advantages that flames of soft fire are concentrated in the central area, and the stability of the burning state of the soft fire is guaranteed.

Description

Technical Field

[0001] This utility model relates to a burner and a gas stove, belonging to the technical field of kitchen appliances. Background Technology

[0002] Gas stoves are common cooking appliances in modern kitchens. They heat cookware by burning gas. The gas valve is a crucial component that controls the gas flow. Its main function is to turn the gas supply on or off according to the user's operation and to regulate the gas flow rate, thereby achieving precise control over the flame size. The burner is where gas mixes with air and burns; it is the key component that converts chemical energy into heat energy. The gas valve injects gas into the burner's injector tube through a nozzle.

[0003] In existing technologies, users control the burner's heat by controlling the gas valve. In many application scenarios, users need to use a low flame for cooking. Typically, a low flame is adjusted by extinguishing the outer ring flame and then reducing the heat of the inner ring flame. However, the inner ring flame has a certain combustion range, resulting in a small and dispersed heat, which leads to an unstable combustion state. Utility Model Content

[0004] The purpose of this invention is to provide a burner and a gas stove that concentrates the flame of a low flame in the central area to ensure stable combustion during low flame conditions.

[0005] This utility model is achieved through the following technical solution.

[0006] A burner has an inner fire combustion section with an inner fire hole, an outer fire combustion section surrounding the inner fire combustion section and having an outer fire hole, and a microflame gas pipe. The inner fire combustion section has a microflame combustion section at its center. The microflame gas pipe extends into the burner and is connected to the microflame combustion section. The microflame combustion section has a microflame hole that communicates with the microflame gas pipe.

[0007] As a further improvement of this utility model, the burner includes an inner fire combustion chamber having the inner fire combustion part, an inner fire ejector tube connected to the inner fire combustion chamber, an outer fire combustion chamber having the outer fire combustion part, and an outer fire ejector tube connected to the outer fire combustion chamber.

[0008] As a further improvement of this utility model, the inner fire combustion chamber extends upward from its bottom end to its top end to form the inner fire combustion part, and the outer fire combustion chamber includes a main cavity surrounding the inner fire combustion chamber and a plurality of circumferentially spaced branch cavities that connect the main cavity and extend upward to its top end to form the outer fire combustion part.

[0009] As a further improvement of this utility model, the ultra-small flame gas pipe includes a first conveying section that sequentially penetrates the outer wall of the outer flame gas chamber and the outer wall of the inner flame gas chamber and extends into the interior of the inner flame gas chamber, an arc-shaped transition section connecting the first conveying section, and a second conveying section connecting the transition section and the ultra-small flame combustion section.

[0010] As a further improvement of this utility model, the ultra-small flame combustion part bulges upward from its edge to the center, and the ultra-small flame holes are arranged around the center of the ultra-small flame combustion part.

[0011] As a further improvement of this utility model, the inner fire combustion section has an upwardly raised area and a downwardly sunken area formed sequentially from its edge to the edge of the micro fire combustion section, which are used to reduce the height difference between the inner fire hole and the micro fire hole.

[0012] As a further improvement of this utility model, the inlet end of the ultra-small fire gas pipe is used to connect to the equipment for transporting gas.

[0013] As a further improvement of this utility model, the ultra-small fire gas pipe extends from the gas inlet end to the gas outlet end, and its cross-sectional area remains unchanged.

[0014] A gas stove includes a burner and a gas valve, the gas valve including a valve body for supplying gas to the burner and the microflame gas pipe, and a control component for controlling the gas supply to the valve body.

[0015] As a further improvement of this utility model, the control component is provided with multiple firepower levels that gradually increase, and among the multiple firepower levels, there are minimum level, intermediate level and maximum level.

[0016] When the control component is in any gear from the maximum to the intermediate gear, the outer flame combustion part and the inner flame combustion part are in a burning state; when the control component is in other gears, the outer flame combustion part is in a extinguished state and the inner flame combustion part is in a burning state.

[0017] When the control component is in the lowest setting, the extremely small flame combustion section is in a burning state, while the inner flame combustion section and the outer flame combustion section are in a extinguished state.

[0018] The extremely small flame combustion unit is in an off state at least when the control component is in any position from the maximum to the intermediate position.

[0019] The beneficial effects of this utility model are:

[0020] The design of the ultra-low flame gas pipe and ultra-low flame combustion section concentrates the flame in the central area, ensuring stable combustion during low flame conditions. In addition, it not only reliably maintains the minimum flame of the burner to prevent flameout, but also serves as an ignition point, avoiding the inconvenience of repeated ignition operations and improving the user experience. Attached Figure Description

[0021] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:

[0022] Figure 1 A schematic diagram of the burner in Case 1 is provided.

[0023] Figure 2 A cross-sectional view of the burner in Case 1. Figure 1 ;

[0024] Figure 3 A cross-sectional view of the burner in Case 1. Figure 2 ;

[0025] Figure 4 This is a cross-sectional schematic diagram of the internal combustion section and the tiny fire combustion section in Case 1.

[0026] Figure 5 A schematic diagram of the gas valve in Case 2;

[0027] Figure 6 This is a cross-sectional view of the gas valve in Case 2.

[0028] Figure 7 for Figure 6 A magnified view of a portion of the image. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0030] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0031] Implementation Case 1:

[0032] A burner for use in gas stoves within kitchen appliances, as shown in the reference. Figures 1-4It includes an inner flame combustion chamber 11, an outer flame combustion chamber 12, an inner flame combustion ejector tube 13, and an outer flame combustion ejector tube 14. The inner flame combustion chamber 11 and the inner flame combustion ejector tube 13 are connected, and the outer flame combustion chamber 12 and the outer flame combustion ejector tube 14 are connected. An inner flame hole a is arranged at the top of the inner flame combustion chamber 11, and an outer flame hole b is arranged at the top of the outer flame combustion ejector tube 14. The top of the outer flame combustion chamber surrounds the top of the inner flame combustion chamber 11. High-speed gas is injected into the inner flame combustion ejector tube 13 and the outer flame combustion ejector tube 14 at one end. Under the ejection action, outside air is drawn in and mixed with the gas. The gas passes through the inner flame combustion chamber and the outer flame combustion chamber 12, ultimately burning at the inner flame hole a to form an inner flame and at the outer flame hole b to form an outer flame.

[0033] In this embodiment, the inner combustion chamber 11 has a seamlessly connected top with an inner combustion hole a, and the outer combustion chamber 12 has a seamlessly connected top with an outer combustion hole b. Because the tops of the inner combustion chamber 11 and the outer combustion chamber 12 are seamlessly connected, the possibility of gas leakage is eliminated outside the inner combustion holes a and b. Compared to existing technologies where gaps appear in the burner head and burner cap after prolonged use, this avoids the loss of combustion efficiency due to gas leakage and ensures the stability of the burner's combustion state, preventing safety hazards.

[0034] In this embodiment, the structure of the inner combustion chamber 11 and the outer combustion chamber 12 includes an inner combustion shell 111 with an opening at the top and an inner combustion part 112 integrally formed at the opening. The outer combustion chamber 12 includes an outer combustion shell 121 with an opening at the top and an outer combustion part 122 integrally formed at the opening. The inner combustion shell 111 and outer combustion shell 121 are equivalent to the burner head in the prior art, and the inner combustion part 112 and outer combustion part 122 are equivalent to the flame cap in the prior art. Although seamless connection can also be achieved through thermal welding, considering that the inner combustion shell 111 and outer combustion shell 121 of the burner head and the inner combustion part 112 and outer combustion part 122 of the flame cap are made of different materials and have different coefficients of thermal expansion, stress concentration may occur at the weld points, eventually causing weld cracking and affecting the safety and stability of the burner. Therefore, the integral molding method adopted in this embodiment is a superior technical solution.

[0035] In this embodiment, the inner flame gas casing 111 is made of aluminum alloy, the outer flame gas casing 121 is made of aluminum alloy, the inner flame combustion section 112 is made of copper alloy, and the outer flame combustion section 122 is made of copper alloy. The inner flame gas casing 111 and outer flame gas casing 121 of the burner head are made of aluminum alloy, while the inner flame combustion section 112 and outer flame combustion section 122 of the burner cap are made of copper alloy. Since copper alloy has a higher thermal conductivity than aluminum alloy, it can conduct heat away more quickly. For the inner flame combustion section 112 and outer flame combustion section 122 of the burner cap, this helps to evenly distribute the heat generated by the flame and reduce the risk of localized overheating, thereby extending service life and improving safety. In contrast, although aluminum alloy has lower thermal conductivity than copper, its good heat dissipation performance is sufficient to meet the functional requirements of the inner flame gas casing 111 and outer flame gas casing 121 of the burner head, while maintaining a lower cost.

[0036] More specifically, in one embodiment, the inner combustion chamber 111 and the inner combustion part 112 are connected by a 3D metal printing edge, and the outer combustion chamber 121 and the outer combustion part 122 are connected by a 3D metal printing edge, that is, the integrated connection is achieved by the 3D metal printing process.

[0037] More specifically, in another embodiment, the inner combustion chamber 111 and the inner combustion part 112 are connected by a connecting edge formed by bimetallic secondary die casting, and the outer combustion chamber 121 and the outer combustion part 122 are connected by a connecting edge formed by bimetallic secondary die casting, that is, the integrated connection is achieved by bimetallic secondary die casting process.

[0038] Both of the above implementation methods can achieve integrated connection. In comparison, the bimetallic secondary die casting method is cheaper in terms of production cost.

[0039] In this embodiment, the inner combustion chamber 11 extends from the bottom to the top, meaning the inner combustion burner is generally a vertical columnar structure. More specifically, the outer combustion shell 121 extends from the bottom to the top opening, and the inner combustion part 112 is integrally formed at the opening.

[0040] In this embodiment, the outer fire gas shell 121 of the outer fire gas chamber 12 has multiple circumferentially spaced and independently arranged openings at its top, and each opening is integrally formed with an outer fire combustion part 122. This means that multiple independent outer fire combustion parts 122 are arranged around the inner fire combustion part 112, which can make the outer fire combustion part 122 structurally miniaturized, thereby effectively reducing the difficulty and requirements of the production and processing technology.

[0041] In this embodiment, the external combustion chamber 12 has a main chamber 12a surrounding the internal combustion chamber 11, and a plurality of circumferentially spaced branch chambers 12b that connect to the main chamber 12a and extend upward to its top. The branch chambers 12b form an external combustion section 122 at its top end, which is provided with external combustion holes b. The gas input from the external flame gas ejector pipe 14 first enters the main cavity 12a, and then is divided into multiple streams of gas by multiple branch cavities 12b. These streams flow along their respective branch cavities 12b to the external flame combustion section 122 and are burned at the external flame hole b. By setting multiple branch cavities 12b, the gas can be distributed and delivered evenly to each external flame combustion section 122 for combustion. Compared with the annular external flame burner head in the prior art, the gas experiences less resistance loss during flow, thereby improving the gas flow efficiency and thus improving combustion efficiency. Furthermore, the multiple branch cavities 12b can equalize the pressure of the gas flow, keeping the gas flowing to each branch cavity 12b in a uniform state, thus keeping the flame cavity of each external flame combustion section 122 balanced, which is beneficial to maintaining the overall combustion effect.

[0042] In this embodiment, more specifically, the outer fire gas casing 121 extends upward from its bottom end to its top opening, the lower part of the outer fire gas casing 121 surrounds the outer fire gas casing 121, and the upper part forms multiple branches that extend upward to its top opening.

[0043] In this embodiment, the branch cavity 12b is designed to extend from the outer side of the upper part of the main cavity 12a and gradually transitions upward to the outer combustion section 122. That is, the branch cavity 12b is an arc-shaped tubular structure that gradually changes the flow direction of the gas, thereby reducing the resistance encountered by the gas when it flows along the branch cavity 12b, thus improving the flow efficiency of the gas and consequently improving the combustion efficiency of the outer combustion section 122.

[0044] In this embodiment, a constriction structure 1r is formed at the inner combustion section 112 near its top of the inner combustion chamber 11 and at the outer combustion section 122 near its top of the branch channel 12b. The cross-sectional area of ​​the constriction structure 1r gradually decreases and then gradually increases along the gas flow direction. When the gas enters the constriction structure 1r, since the cross-sectional area of ​​the constriction structure 1r decreases first, according to the continuity equation, the gas velocity must increase to maintain the same flow rate. At the same time, according to Bernoulli's law, the static pressure will decrease where the flow velocity increases. Subsequently, the cross-sectional area of ​​the constriction structure 1r gradually increases, the gas velocity begins to slow down and the pressure gradually recovers. This change in velocity helps the gas and air mix, thereby improving the injection efficiency and combustion efficiency at the outer flame hole b and the inner flame hole a.

[0045] In this embodiment, the outer flame combustion section 122 rises upward from its edge to the center, and the outer flame holes b are arranged around the center of the outer flame combustion section 122, so that the gas can surround the center of the outer flame combustion section 122 and be injected radially to the periphery of the outer flame combustion section 122, thereby expanding the coverage of the flame on the outer flame combustion section 122, so that the gas can be fully burned, thereby improving the combustion efficiency.

[0046] In this embodiment, the inner combustion section 112 has an upwardly raised area 1121 formed from its edge inward. The inner flame hole a is arranged in the raised area 1121, which is the same as the principle of the outer combustion section 122. This allows the gas to surround the center of the inner combustion section 112 and be injected radially into the inner periphery of the inner combustion section 112, thereby expanding the coverage of the flame on the inner combustion section 112, so that the gas can be fully burned, thereby improving the combustion efficiency.

[0047] In this embodiment, the inner fire gas ejector tube 13 extends through the outer fire gas chamber 12 and is connected to the inner fire gas chamber 11, while the outer fire gas ejector tube 14 is connected to the main cavity 12a of the outer fire gas chamber 12.

[0048] In this embodiment, the inner combustion gas ejector 13 and the outer combustion gas ejector 14 are horizontally arranged and parallel to each other, and their positional relationship is symmetrical about the outer combustion gas chamber 12. The inner combustion gas ejector 13 has an inner combustion gas connection portion 131 that is bent and connected to the inner combustion gas chamber 11. This connection portion is used to adjust the gas intake direction and direct it towards the center of the inner combustion gas chamber 11. This makes the gas distribution more uniform after flowing into the inner combustion gas chamber 11 from the inner combustion gas connection portion 131. This reduces the resistance loss caused by the resistance on the inner wall of the inner combustion gas shell 111 during upward flow, thereby improving the gas flow efficiency and combustion efficiency at the inner combustion section 112. The external combustion gas ejector tube 14 has a curved external combustion gas connection part 141 that connects to the main cavity 12a. This connection part is used to adjust the gas intake direction and direct it toward the center of the main cavity 12a. This makes the gas distribution more uniform after flowing from the external combustion gas connection part 141 into the internal combustion gas cavity 11. This facilitates the distribution of gas to each branch cavity 12b, thereby improving the gas flow efficiency and combustion efficiency at the external combustion part 122.

[0049] The burner in this embodiment also includes a microflame gas pipe 15, an inner fire combustion section 112 with a microflame combustion section 151 at its center, a microflame hole c on the microflame combustion section 151, and the microflame gas pipe 15 extends through into the inner fire combustion chamber 11, connects to the microflame combustion section 151 and communicates with the microflame hole c.

[0050] In this embodiment, the low flame gas pipe 15 is set independently of the inner flame gas chamber 11 and the outer flame gas chamber 12. The low flame gas pipe 15 stably delivers gas to the low flame combustion section 151 for combustion. The flame formed at the low flame combustion section 151 is mainly used for minimum firepower, i.e., minimum combustion output. At minimum firepower, both the inner flame combustion section 112 and the outer flame combustion section 122 of the burner are in an extinguished state. The stable gas delivery through the low flame combustion pipe and the stable combustion at the low flame combustion section 151 ensure stable control of the minimum firepower. This prevents flameout due to improper operation when the user reduces the burner firepower to low flame, effectively avoiding the inconvenience of repeated ignition by the user, thus serving as an ignition point. In other words, the low flame gas pipe 15 and the low flame combustion section 151 not only reliably maintain the minimum firepower of the burner to prevent flameout, but also serve as an ignition point, avoiding the inconvenience of repeated ignition by the user and improving the user experience.

[0051] In this embodiment, the miniature flame gas pipe 15 includes a first delivery section 15a, a transition section 15b, and a second delivery section 15c. The first delivery section 15a passes through the outer wall of the outer flame gas chamber 12 and the inner wall of the inner flame gas chamber 11 and extends into the interior of the inner flame gas chamber 11. The transition section 15b connects the first delivery section 15a and the second delivery section 15c and forms an arc transition. The second delivery section 15c extends upward and connects to the miniature flame combustion section 151. The arc transition section 15b can reduce the resistance encountered during gas delivery, thereby reducing resistance loss and improving the gas flow efficiency, which in turn improves the combustion efficiency at the miniature flame combustion section 151.

[0052] In this embodiment, the microflame combustion section 151 rises upward from its edge towards the center, and the microflame holes c are arranged around the center of the microflame combustion section 151. The structure of the microflame combustion section 151 is the same as that of the outer flame combustion section 122, so that the gas can be injected radially around the center of the microflame combustion section 151 and towards the periphery of the microflame combustion section 151, thereby expanding the coverage area of ​​the flame on the microflame combustion section 151, so that the gas can be fully burned, thereby improving the combustion efficiency.

[0053] In this embodiment, the inner fire combustion section 112 forms an upwardly raised area 1121 and a downwardly lowered area 1122 from its edge to the edge of the ultra-low flame combustion section 151. This reduces the height difference between the inner fire hole a and the ultra-low flame hole c, thereby preventing the flame at the inner fire combustion section 112 from being too far from the bottom of the pot, while the flame at the ultra-low flame combustion section 151 is closer to the bottom of the pot. This makes the horizontal arrangement of the flames more reasonable, and also prevents the center of the ultra-low flame combustion section 151 from being too high and colliding with the bottom of the pot.

[0054] In this embodiment, the inlet end of the miniflame gas pipe 15 is used to connect to the gas supply device, namely the gas valve. There is a gap between the burner's outer flame gas injector pipe 14 and inner flame gas injector pipe 13 and the nozzle on the gas valve. The nozzle injects gas into the injector pipe, causing surrounding air to be drawn in and mixed with the gas, thereby improving the combustion completeness of the inner flame combustion section 112 and the outer flame combustion section 122. Since the miniflame combustion section 151 is used to maintain the burner's minimum heat output, its requirements for combustion intensity and completeness are very low. Therefore, it does not need to utilize Bernoulli's principle to draw in air for mixing like the injector pipe; a direct connection is sufficient. Gas is delivered to the miniflame combustion section 151 through the miniflame gas pipe 15 to achieve stable and reliable miniflame combustion. In addition, it should be noted that in the prior art, when the burner is in the low flame state, the flow rate of the gas injected from the nozzle into the injector is relatively slow, resulting in insufficient air suction, which will affect the flow of gas in the burner and thus easily cause flameout or flameout. However, in this embodiment, since the low flame gas pipe 15 is directly connected to the gas valve, this situation can be effectively avoided.

[0055] In this embodiment, the miniflame gas pipe 15 extends from the inlet end to the outlet end, and its cross-sectional area remains unchanged. Since the miniflame gas pipe 15 is directly connected to the gas supply device, i.e., the gas valve, its structure does not need to be set as a Venturi tube shape like an injector. Keeping the cross-sectional area unchanged can improve the stability of the gas flow state in the miniflame gas pipe 15, thereby ensuring that the combustion of the miniflame combustion section 151 remains stable.

[0056] Implementation Case 2:

[0057] A gas valve, as shown in the reference Figures 5-7 It includes a valve body 21 and a control component. The valve body 21 is used to supply gas to the burner, as shown in Embodiment 1, and the control component is used to control the gas valve.

[0058] In this embodiment, the control component includes a valve stem 22 mounted on the valve body 21 and a knob 23 mounted on the valve stem 22. The user can rotate the valve stem 22 by the knob 23 to control the control component, thereby determining the combustion intensity of the corresponding burner. The valve body 21 has a stop plate 24 on its top. The top surface of the stop plate 24 is flat and has multiple stop points 241 corresponding to the control component. The valve stem 22 is provided with a stop unit 25. The valve stem 22 can rotate around its axis, allowing the stop unit 25 to engage or disengage with different stop points 241.

[0059] In this implementation case, when the user manually controls the knob 23 to rotate the valve stem 22 for adjustment, the setting unit 25 and different gear nodes 241 can be precisely adjusted, thereby accurately controlling the firepower of the burner. As the valve stem 22 rotates, the setting unit 25 and the gear node 241 change from the engaged state to the disengaged state, which will provide the user with a tactile feedback, thus making the user's operation more precise.

[0060] In this embodiment, the control component has a rotatable control state and a non-rotatable original state. In the original state, the user cannot rotate the valve stem 22, which can prevent the user from accidentally touching the knob 23 and causing changes in the firepower. The valve stem 22 can move axially to switch between the control state and the original state of the control component. The control component is equipped with a valve stem return elastic element 2a that drives the valve stem 22 back to the original state. More specifically, the valve stem 22 is in the control state when it is in the lowest position. When the user releases the knob 23, it is reset to the highest position under the action of the valve stem return elastic element 2a, so that the control component is in the original state.

[0061] In this embodiment, the gear position node 241 is formed by a recess on the surface of the gear plate 24, specifically an arc-shaped recess. A gear position mounting seat 26 is provided on the valve stem 22, and the gear position unit 25 is slidably connected to the gear position mounting seat 26. The gear position unit 25 has a fixed gear state and an adjustable state. The fixed gear state is when the gear position unit 25 and the gear position node 241 are engaged, while the adjustable state is when the gear position unit 25 and the gear position node 241 are disengaged. The up and down sliding of the gear position unit 25 on the gear position mounting seat 26 can switch its fixed gear state and adjustable state. The gear position unit 25 is equipped with a gear position elastic reset member 2b that drives the gear position unit 25 to return to the fixed gear state. When the gear position unit 25 is in the highest position relative to the gear position mounting seat 26, it is in the adjustable state, and when the gear position unit 25 is in the lowest position relative to the gear position mounting seat 26, it is in the fixed gear state. When the gear setting unit 25 is in the gear setting state, it engages with the gear position node 241; when it is in the adjustment state, it slides against the surface of the gear setting plate 24. This engagement allows the gear setting unit 25 to engage with the gear position node, enabling precise control of the firepower. Simultaneously, applying a certain force allows the gear setting unit 25 to slide from the recess onto the surface of the gear setting plate 24, thus separating the two.

[0062] In this embodiment, the valve stem 22 is provided with a radially protruding positioning structure 221. The valve stem return elastic element 2a is sleeved on the valve stem 22, and its two ends are respectively supported on the positioning structure 221 and the stop mounting seat 26. The valve stem return elastic element 2a is specifically configured as a compression spring. The positioning structure 221 can be configured as a snap ring or other structure that can be connected to the valve stem 22. The stop mounting seat 26 not only serves as the mounting component of the stop unit 25, but also as the supporting component of the valve stem return elastic element 2a, which can simplify the structure of the control component.

[0063] In this embodiment, the control component is set with a minimum and a maximum. The plate has a corresponding minimum gear node 241 and a maximum gear node 241. The minimum gear node 241 and the maximum gear node 241 are more concave than the other gear nodes 241. Therefore, when the user rotates to the maximum and minimum, the tactile feedback is more obvious than the others, which can give the user more clear control instructions.

[0064] In this embodiment, the gear-setting mounting base 26 has a vertically penetrating channel 261 with a stepped structure 262. The stepped structure 262 makes the diameter of the upper part of the channel 261 smaller than that of the lower part. A sealing structure 263 is provided at the top of the channel 261, sealing the top of the channel 261 and forming an opening at the bottom of the gear-setting mounting base 26. The gear-setting unit 25 includes a gear-setting slide rod 251 slidably connected in the channel 261 and a gear-setting bead 252 disposed at the bottom of the gear-setting slide rod 251 and capable of being engaged with the gear position node 241. The top of the gear-setting slide rod 251 has a support structure 262. The flange structure 253 on the 2nd plate, therefore the step structure 262 defines the lowest position of the fixed bead 252. The fixed bead elastic reset member 2b is set in the channel 261, and its two ends support the sealing structure 263 and the flange structure 253 respectively. When the user presses the button to change the control component from the initial state to the control state, as the user rotates the knob 23, the fixed bead 252 gradually disengages from the current gear position node, the valve stem reset elastic member 2a is continuously compressed, and the fixed bead 252 slides on the surface of the fixed plate 24. When the fixed bead 252 slides to the next gear position node, under the elastic force of the valve stem reset elastic member 2a, the fixed bead 252 is locked into the gear position node.

[0065] In this embodiment, the blocking structure 263 can be adjusted in position along the extension direction of the channel 261, thereby changing the distance between the blocking structure 263 and the step structure 262, which can change the initial compression of the fixed elastic reset member 2b, thereby changing the magnitude of the reset elastic force of the fixed elastic reset member 2b, allowing the user to make adaptive adjustments according to their preferences.

[0066] In this embodiment, more specifically, the sealing structure 263 and the inner wall of the channel 261 are threaded together. The user can adjust the position of the sealing structure 263 in the channel 261 by rotating the sealing structure 263, which is convenient for the user to adjust.

[0067] In this embodiment, the bottom of the shift lever 251 is provided with a mounting hole 2511 that matches the shape of the shift bead 252, and the diameter of the opening of the mounting hole 2511 is smaller than the diameter of the shift bead 252, so that the shift bead 252 will not come out of the mounting hole 2511, and the shift bead 252 can roll on the surface of the shift plate 24. Compared with the sliding movement method, it has less resistance and the user feels smoother when rotating.

[0068] The gas valve in this embodiment has a valve body 21 with a minimum flame gas outlet 253, an inner flame gas nozzle 251, and an outer flame gas nozzle 252. The minimum flame gas outlet 253 is connected to the minimum flame gas pipe 15. The inner flame gas nozzle 251 injects gas into the inner flame gas ejector pipe 13, and the outer flame gas nozzle 252 injects gas into the outer flame gas ejector pipe 14.

[0069] Implementation Case 3:

[0070] A gas stove includes a burner and a gas valve, wherein the burner is as shown in Embodiment 1 and the gas valve is as shown in Embodiment 2.

[0071] In this embodiment, when the control components of the gas valve are in their minimum position, the minimum flame combustion section 151 is in a combustion state, while the inner flame combustion section 112 and the outer flame combustion section 122 are in a extinguished state. That is, in the minimum position, the minimum flame gas outlet 253 of the valve body 21 continuously supplies gas into the minimum flame gas pipe 15, while the inner flame gas nozzle 251 and the outer flame gas nozzle 252 stop injecting gas into the inner flame gas ejector pipe 13 and the outer flame gas ejector pipe 14.

[0072] In this embodiment, both the inner flame combustion section 112 and the outer flame combustion section 122 of the minimum burner are in an extinguished state. The stable gas supply through the minimum flame combustion tube and the stable combustion at the minimum flame combustion section 151 ensure stable control of the minimum flame. This prevents the flame from going out due to improper operation when the user reduces the burner flame to the minimum flame, and also effectively avoids the trouble of the user having to re-ignite in this situation, thus serving as an ignition point.

[0073] In this embodiment, the outer flame combustion section 122 and the inner flame combustion section 112 are in a burning state when the control component is in any gear from the maximum to the intermediate gear. When the control component is in other gears, the outer flame combustion section 122 is in a extinguished state and the inner flame combustion section 112 is in a burning state. The microflame combustion section 151 is in a extinguished state at least when the control component is in any gear from the maximum to the intermediate gear. When the control component is in a gear from the intermediate to the minimum gear, the microflame combustion section 151 can be burning when the gear is lower, and the microflame combustion section 151 is extinguished when the gear is lowered so that the inner flame combustion section 112 can be stably burning.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A burner, characterized in that, It has an inner fire combustion section (112) with an inner fire hole (a), an outer fire combustion section (122) surrounding the inner fire combustion section (112) and with an outer fire hole (b), and a microflame gas pipe (15). A microflame combustion section (151) is provided at the center of the inner fire combustion section (112). The microflame gas pipe (15) extends into the burner and is connected to the microflame combustion section (151). The microflame combustion section (151) is provided with a microflame hole (c) that communicates with the microflame gas pipe (15).

2. The burner according to claim 1, characterized in that, The burner includes an inner fire combustion chamber (11) having the inner fire combustion section (112), an inner fire ejector tube connected to the inner fire combustion chamber (11), an outer fire combustion chamber (12) having the outer fire combustion section (122), and an outer fire ejector tube connected to the outer fire combustion chamber (12).

3. The burner according to claim 2, characterized in that, The inner fire combustion chamber (11) extends upward from its bottom end to its top end to form the inner fire combustion section (112). The outer fire combustion chamber (12) includes a main cavity (12a) surrounding the inner fire combustion chamber (11) and a plurality of circumferentially spaced branch cavities (12b) that connect the main cavity (12a) and extend upward to its top end to form the outer fire combustion section (122).

4. The burner according to claim 3, characterized in that, The microflame gas pipe (15) includes a first delivery section (15a) that passes through the outer wall of the outer flame gas chamber (12) and the outer wall of the inner flame gas chamber (11) and extends into the inner flame gas chamber (11), an arc-shaped transition section (15b) that connects to the first delivery section (15a), and a second delivery section (15c) that connects to the transition section (15b) and connects to the microflame combustion section (151).

5. The burner according to claim 1, characterized in that, The microflame combustion section (151) bulges upward from its edge toward the center, and the microflame holes (c) are arranged around the center of the microflame combustion section (151).

6. The burner according to claim 5, characterized in that, The inner fire combustion section (112) has an upwardly raised area (1121) and a downwardly lowered area (1122) formed sequentially from its edge to the edge of the minimum fire combustion section (151) to reduce the height difference between the inner fire hole (a) and the minimum fire hole (c).

7. The burner according to claim 1, characterized in that, The inlet end of the extremely small fire gas pipe (15) is used to connect to the equipment for transporting gas.

8. The burner according to claim 7, characterized in that, The extremely small fire gas pipe (15) extends from the inlet end to the outlet end, and its cross-sectional area remains unchanged.

9. A gas stove, characterized in that, The invention includes the burner and gas valve according to any one of claims 1-8, wherein the gas valve includes a valve body (21) for supplying gas to the burner and the miniature fire gas pipe (15) and a control component for controlling the gas supply to the valve body (21).

10. The gas stove according to claim 9, characterized in that, The control unit is equipped with multiple levels of gradually increasing firepower, including a minimum level, a middle level, and a maximum level. When the control component is in any gear from the maximum gear to the intermediate gear, the outer flame combustion part (122) and the inner flame combustion part (112) are in a burning state. When the control component is in any other gear, the outer flame combustion part (122) is in a extinguished state and the inner flame combustion part (112) is in a burning state. When the control unit is in the lowest setting, the extremely small flame combustion section (151) is in a burning state, and the inner flame combustion section (112) and the outer flame combustion section (122) are in a extinguished state; The very small flame combustion section (151) is in an off state at least in any position of the control component from the maximum to the intermediate position.

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