Combustor and gas stove

Abstract

The utility model discloses a burner which comprises an inner fire gas cavity, an inner fire gas injection pipe, an outer fire gas cavity and an outer fire gas injection pipe, wherein the inner fire gas cavity and the inner fire gas injection pipe are connected with each other; the inner fire gas cavity is provided with a top which is seamlessly connected and provided with inner fire holes, the outer fire gas cavity is provided with a top which is seamlessly connected and provided with outer fire holes, and the top of the outer fire gas cavity surrounds the top of the inner fire gas cavity. The utility model further discloses a gas stove. The gas stove has the advantages that gas leakage is avoided, combustion efficiency is improved, and potential safety hazards are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of burner and gas stove, belong to the technical field of kitchen appliances. BACKGROUND

[0002] The burner of gas stove is one of its core components, mainly composed of burner head and fire cap, which jointly act to ensure that gas can be safely and effectively burned. Burner head is responsible for the flow and distribution of fuel gas. The fire cap is located above the burner head, and its main function is to control the mixing ratio of fuel gas and air, thereby affecting the quality of the flame. The fire cap has fire holes, and the fuel gas is ignited to form a flame after being sprayed through these fire holes.

[0003] Currently, in the prior art, the connection mode of the burner head and the fire cap is usually a nested connection or a buckle connection. Due to the precision of processing and long-term use and cleaning, the gap between the burner head and the fire cap gradually increases, eventually forming a large gap, which causes fuel gas to overflow and leak from the gap and burn, resulting in certain energy loss and safety risks. SUMMARY

[0004] The utility model aims to provide a kind of burner and gas stove, avoid fuel gas to leak, improve combustion efficiency and avoid security risks.

[0005] The utility model is realized by the following technical solutions.

[0006] A burner includes an inner fire gas cavity and an inner fire gas injection pipe connected to each other, and an outer fire gas cavity and an outer fire gas injection pipe connected to each other.

[0007] The inner fire gas cavity has a top portion with a seamless connection and an inner fire hole arranged therein, the outer fire gas cavity has a top portion with a seamless connection and an outer fire hole arranged therein, and the top portion of the outer fire gas cavity surrounds the top portion of the inner fire gas cavity.

[0008] As a further improvement of the utility model, the inner fire gas cavity includes an inner fire gas shell with an opening at the top end, and an inner fire combustion part integrally formed at the opening. The outer fire gas cavity includes an outer fire gas shell with an opening at the top portion, and an outer fire combustion part integrally formed at the opening.

[0009] As a further improvement of the utility model, the inner fire gas shell is made of aluminum alloy, the outer fire gas shell is made of aluminum alloy, the inner fire combustion part is made of copper alloy, and the outer fire combustion part is made of copper alloy.

[0010] As a further improvement of the utility model, the inner fire gas shell and the inner fire combustion part are formed with an interface edge formed by 3D metal printing, and the outer fire gas shell and the outer fire combustion part are formed with an interface edge formed by 3D metal printing.

[0011] As a further improvement of the utility model, the inner fire gas shell and the inner fire combustion part are formed with an interface edge formed by double-metal secondary die casting, and the outer fire gas shell and the outer fire combustion part are formed with an interface edge formed by double-metal secondary die casting.

[0012] As a further improvement of the utility model, the top of the outer fire gas shell is provided with a plurality of openings spaced apart and independently arranged in the circumferential direction, and the outer fire combustion part is integrally formed at each opening.

[0013] As a further improvement of the utility model, the outer fire gas shell extends from the bottom end to the opening at the top end, and the lower part of the outer fire gas shell surrounds the outer fire gas shell, and the upper part forms a plurality of branches and extends upward to the opening at the top end.

[0014] As a further improvement of the utility model, it further comprises a very small fire gas pipe, a very small fire hole is arranged at the center of the top of the inner fire gas cavity, and the very small fire gas pipe extends into the inner fire gas cavity, and the gas outlet end is connected to the center of the top of the inner fire gas cavity and communicates with the very small fire hole.

[0015] As a further improvement of the utility model, the gas inlet end of the very small fire gas pipe is used to connect the device for conveying gas, and the very small fire gas pipe extends from the gas inlet end to the gas outlet end, and the cross-sectional area remains unchanged.

[0016] A gas stove comprises the burner and a gas valve for controlling the gas conveyed to the burner.

[0017] The utility model has the advantages of:

[0018] Since the top of the inner fire gas cavity and the outer fire gas cavity is seamlessly connected, the possibility of gas leakage at the inner fire hole and the outer fire hole is eliminated, compared with the existing technology, the gap of the burner and the fire cover after long-term use leads to gas leakage, which can avoid the loss of combustion efficiency caused by gas leakage, and can ensure the stability of the combustion state of the burner, and avoid safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0019] The preferred embodiments of the utility model will be described in detail below with reference to the drawings to help understand the purpose and advantages of the utility model, wherein:

[0020] Figure 1 is a schematic view of the burner in the embodiment case 1;

[0021] Figure 2 is a schematic view of the burner in the embodiment case 1; Figure One ;

[0022] Figure 3 is a schematic view of the burner in the embodiment case 1; Figure Two ;

[0023] Figure 4 is a schematic view of the burner in the embodiment case 1;

[0024] Figure 5 is a schematic view of the gas valve in the embodiment case 2;

[0025] Figure 6 is a schematic view of the gas valve in the embodiment case 2;

[0026] Figure 7 is a schematic view of the gas valve in the embodiment case 2; Figure 6 DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail according to the drawings and embodiment cases.

[0028] In this specification, the orientation terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or possibly mentioned are defined relative to the structure shown in the drawings. The words "inner" and "outer" respectively refer to the direction towards or away from the geometric center of a particular component. They are relative concepts, so they may change accordingly according to their different positions, different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms.

[0029] Embodiment case 1:

[0030] A burner is applied to a gas stove in a kitchen appliance, referring to Figures 1-4 ​It comprises an inner fire gas cavity 11, an outer fire gas cavity 12, an inner fire gas injection pipe 13 and an outer fire gas injection pipe 14, wherein the inner fire gas cavity 11 and the inner fire gas injection pipe 13 are connected, the outer fire gas cavity 12 and the outer fire gas injection pipe 14 are connected, the top of the inner fire gas cavity 11 is arranged with an inner fire hole a, the top of the outer fire gas injection pipe 14 is arranged with an outer fire hole b, and the top of the outer fire gas cavity is arranged around the top of the inner fire gas cavity 11. The high-speed gas is injected into one end of the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14, and under the action of injection, the air outside is sucked in and mixed with the gas. The gas passes through the inner fire gas cavity and the outer fire gas cavity 12, and finally burns at the inner fire hole a to form an inner fire flame and at the outer fire hole b to form an outer fire flame.

[0031] In the embodiment, the inner fire gas cavity 11 has a top with a seamless connection and is arranged with an inner fire hole a, and the outer fire gas cavity 12 has a top with a seamless connection and is arranged with an outer fire hole b. Since the top of the inner fire gas cavity 11 and the top of the outer fire gas cavity 12 are seamlessly connected, the top of the inner fire gas cavity 11 and the top of the outer fire gas cavity 12 can prevent gas leakage at the inner fire hole a and the outer fire hole b. Compared with the existing technology, the burner can avoid the loss of combustion efficiency caused by gas leakage and ensure the stability of the combustion state of the burner, thereby avoiding safety hazards.

[0032] In the embodiment, the structure of the inner fire gas cavity 11 and the outer fire gas cavity 12, the inner fire gas cavity 11 comprises an inner fire gas shell 111 with an opening at the top end and an inner fire combustion part 112 integrally formed at the opening, and the outer fire gas cavity 12 comprises an outer fire gas shell 121 with an opening at the top and an outer fire combustion part 122 integrally formed at the opening. The inner fire gas shell 111 and the outer fire gas shell 121 correspond to the burner of the prior art, and the inner fire combustion part 112 and the outer fire combustion part 122 correspond to the fire cover of the prior art. Although the seamless connection can also be achieved by heat welding, considering that the materials of the inner fire gas shell 111 and the outer fire gas shell 121 of the burner and the inner fire combustion part 112 and the outer fire combustion part 122 of the fire cover have different thermal expansion coefficients, stress concentration may occur at the welding point, which may cause the welding seam to crack over time, affecting the safety and stability of the burner. Therefore, the one-piece molding method of the embodiment is a more excellent technical solution.

[0033] In the present embodiment, the inner fire gas shell 111 is made of aluminum alloy, the outer fire gas shell 121 is made of aluminum alloy, the inner fire combustion part 112 is made of copper alloy, and the outer fire combustion part 122 is made of copper alloy. The inner fire gas shell 111 and the outer fire gas shell 121 are made of aluminum alloy, and the inner fire combustion part 112 and the outer fire combustion part 122 are made of copper alloy. Since the thermal conductivity of copper alloy is higher than that of aluminum alloy, it means that copper alloy can conduct heat faster. For the inner fire combustion part 112 and the outer fire combustion part 122, it helps to evenly distribute the heat generated by the flame and reduces the risk of local overheating, thereby prolonging the service life and improving safety. In contrast, although the thermal conductivity of aluminum alloy is not as good as that of copper, its good heat dissipation performance is sufficient to meet the functional requirements of the inner fire gas shell 111 and the outer fire gas shell 121, while keeping the cost low.

[0034] More specifically, in one embodiment, the inner fire gas shell 111 and the inner fire combustion part 112 are formed with a joint edge formed by 3D metal printing, and the outer fire gas shell 121 and the outer fire combustion part 122 are formed with a joint edge formed by 3D metal printing, that is, the integration is achieved by the 3D metal printing process.

[0035] More specifically, in another embodiment, the inner fire gas shell 111 and the inner fire combustion part 112 are formed with a joint edge formed by double-metal secondary die casting, and the outer fire gas shell 121 and the outer fire combustion part 122 are formed with a joint edge formed by double-metal secondary die casting, that is, the integration is achieved by the double-metal secondary die casting process.

[0036] Both of the above two embodiments can achieve integration, and compared with the double-metal secondary die casting method, the double-metal secondary die casting method is more cost-effective in production cost.

[0037] In the present embodiment, the inner fire gas cavity 11 extends upward from the bottom end to the top end, that is, the inner fire burner presents a vertical columnar structure as a whole, and more specifically, the outer fire gas shell 121 extends upward from the bottom end to the opening at the top end, and the inner fire combustion part 112 is integrally formed at the opening.

[0038] In the present embodiment, for the outer fire gas shell 121 of the outer fire gas cavity 12, the top of the outer fire gas shell 121 has a plurality of openings spaced apart and independently arranged circumferentially, and each opening is integrally formed with an outer fire combustion part 122, that is, the inner fire combustion part 112 is arranged in a ring around a plurality of independent outer fire combustion parts 122, which can miniaturize the structure of the outer fire combustion part 122, thereby effectively reducing the difficulty and requirements of the production and processing process.

[0039] In the embodiment, the outer fire gas cavity 12 has a main cavity 12a surrounding the inner fire gas cavity 11, a plurality of branch cavity passages 12b circumferentially spaced and connected to the main cavity 12a and extending upward to the top end of the main cavity 12a, and the branch cavity passages 12b form the outer fire combustion part 122 at the top end where the outer fire holes b are arranged. The gas input by the outer fire gas injector 14 first enters the main cavity 12a, and then is distributed by the plurality of branch cavity passages 12b to form a plurality of gas streams, respectively flows along the corresponding branch cavity passage 12b to the outer fire combustion part 122 and burns at the outer fire hole b. By arranging the plurality of branch cavity passages 12b, the gas can be dispersedly delivered, so that the gas can be uniformly delivered to each outer fire combustion part 122 for combustion. Compared with the outer fire burner head in the prior art which is annular, the gas has less resistance loss in the flow process, thereby improving the flow efficiency of the gas and in turn improving the combustion efficiency. In addition, the plurality of branch cavity passages 12b can play a pressure equalizing role for the flow of the gas, so that the gas distributed to each branch cavity passage 12b remains in a uniform state, thereby keeping the flame passage of each outer fire combustion part 122 balanced, which is conducive to maintaining the overall combustion effect.

[0040] In the embodiment, more specifically, the outer fire gas shell 121 extends upward from the bottom end to the opening at the top end, and the lower part of the outer fire gas shell 121 surrounds the outer fire gas shell 121, and the upper part forms a plurality of branches and extends upward to the opening at the top end.

[0041] In the embodiment, for the specific structure of the branch cavity passage 12b, the branch cavity passage 12b extends from the outer side of the upper part of the main cavity 12a and gradually transitions to upward and extends to the outer fire combustion part 122, that is, the branch cavity passage 12b presents an arc-shaped transition tubular structure, which gradually changes the flow direction of the gas, so that the gas can reduce the resistance effect when flowing along the branch cavity passage 12b, thereby improving the flow efficiency of the gas and in turn improving the combustion efficiency of the outer fire combustion part 122.

[0042] In the embodiment, the inner fire gas cavity 11 is formed with a convergent-divergent nozzle structure Ir near the inner fire combustion part 112 at the top end, and the branch cavity passage 12b is formed with a convergent-divergent nozzle structure Ir near the outer fire combustion part 122 at the top end. The cross-sectional area of the convergent-divergent nozzle structure Ir gradually decreases and then gradually increases along the flow direction of the gas. When the gas enters the convergent-divergent nozzle structure Ir, the cross-sectional area of the convergent-divergent nozzle structure Ir first decreases, so the speed of the gas must increase to maintain the same flow rate according to the continuity equation, and the static pressure will decrease at the place where the flow rate increases according to Bernoulli's law. Then the cross-sectional area of the convergent-divergent nozzle structure Ir gradually increases, the speed of the gas begins to slow down and the pressure gradually recovers. This change in speed helps the mixing of the gas and air, thereby improving the injection efficiency at the outer fire hole b and the inner fire hole a and the combustion efficiency.

[0043] In the embodiment, the outer fire combustion part 122 is upwardly convex from its edge to the center, and the outer fire hole b is arranged around the center of the outer fire combustion part 122, so that the gas can be injected in a radial direction around the center of the outer fire combustion part 122 and to the periphery of the outer fire combustion part 122, thereby expanding the coverage of the flame on the outer fire combustion part 122, so that the gas can be fully combusted, thereby improving the combustion efficiency.

[0044] In the embodiment, the inner fire combustion part 112 is formed with a convex region 1121 which is upwardly convex from its edge to the center, and the inner fire hole a is arranged in the convex region 1121, and the outer fire combustion part 122 has the same principle, so that the gas can be injected in a radial direction around the center of the inner fire combustion part 112 and to the periphery of the inner fire combustion part 112, thereby expanding the coverage of the flame on the inner fire combustion part 112, so that the gas can be fully combusted, thereby improving the combustion efficiency.

[0045] In the embodiment, for the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14, the inner fire gas injection pipe 13 penetrates into the outer fire gas cavity 12 and is connected with the inner fire gas cavity 11, and the outer fire gas injection pipe 14 is connected with the main cavity 12a of the outer fire gas cavity 12.

[0046] In the embodiment, the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14 are horizontally arranged and parallel to each other, and the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14 are symmetrically arranged with respect to the outer fire gas cavity 12. The inner fire gas injection pipe 13 has an inner fire gas connecting part 131 which is curvedly formed and connected with the inner fire gas cavity 11, for adjusting the gas inlet direction and directing it to the center of the inner fire gas cavity 11, so that the distribution state of the gas after flowing into the inner fire gas cavity 11 from the inner fire gas connecting part 131 is more uniform, thereby reducing the resistance loss caused by the resistance of the inner wall of the inner fire gas shell 111 during upward flowing, and thereby improving the flow efficiency of the gas and the combustion efficiency at the inner fire combustion part 112. The outer fire gas injection pipe 14 has an outer fire gas connecting part 141 which is curvedly formed and connected with the main cavity 12a, for adjusting the gas inlet direction and directing it to the center of the main cavity 12a, so that the distribution state of the gas after flowing into the inner fire gas cavity 11 from the outer fire gas connecting part 141 is more uniform, which is beneficial to the gas shunting to each branch cavity 12b, and thereby improving the flow efficiency of the gas and the combustion efficiency at the outer fire combustion part 122.

[0047] The burner of the embodiment further comprises a small fire gas pipe 15, a small fire combustion part 151 is arranged at the center of the inner fire combustion part 112, a small fire hole c is arranged on the small fire combustion part 151, and the small fire gas pipe 15 penetrates into the inner fire gas cavity 11 to connect the small fire combustion part 151 and communicate with the small fire hole c.

[0048] In the embodiment, the small fire gas pipe 15 is arranged independently from the inner fire gas cavity 11 and the outer fire gas cavity 12, and the gas can be stably delivered to the small fire combustion part 151 through the small fire gas pipe 15 for combustion. The flame formed at the small fire combustion part 151 is mainly used for minimum fire, i.e., minimum combustion output. When the inner fire combustion part 112 and the outer fire combustion part 122 of the lower burner are both in an off state, the stable delivery of the gas through the small fire combustion pipe and the stable combustion at the small fire combustion part 151 can ensure the stable control of the minimum fire. In the case that the user controls the fire of the burner to be small and the fire is turned off due to improper operation, the user can avoid the trouble of re-ignition, i.e., the small fire combustion part 151 can play the role of priming. That is, the arrangement of the small fire gas pipe 15 and the small fire combustion part 151 can not only stably and reliably maintain the minimum fire of the burner to avoid turning off, but also play the role of priming, avoid the operation trouble of the user due to repeated ignition, and improve the user experience.

[0049] In the embodiment, the small fire gas pipe 15 comprises a first delivery section 15a, a transition section 15b, and a second delivery section 15c. The first delivery section 15a penetrates the outer wall of the outer fire gas cavity 12 and the inner wall of the inner fire gas cavity 11 in sequence and extends into the inner fire gas cavity 11. The transition section 15b connects the first delivery section 15a and the second delivery section 15c and is arc-shaped. The second delivery section 15c extends upward and is connected to the small fire combustion part 151. The arc-shaped transition section 15b can reduce the resistance of the gas delivery, thereby improving the flow efficiency of the gas and the combustion efficiency of the small fire combustion part 151.

[0050] In the embodiment, the small fire combustion part 151 is upwardly raised from the edge to the center. The small fire hole c is arranged around the center of the small fire combustion part 151. The structure of the small fire combustion part 151 is the same as that of the outer fire combustion part 122, so that the gas can be injected in a radial direction around the center of the small fire combustion part 151 and to the periphery of the small fire combustion part 151, thereby expanding the coverage of the flame on the small fire combustion part 151 and enabling the gas to be fully combusted, thereby improving the combustion efficiency.

[0051] In the embodiment, the inner fire combustion part 112 is formed by a raised area 1121 and a lowered area 1122 in sequence from the edge of the inner fire combustion part 112 to the edge of the minimal fire combustion part 151, so as to reduce the height difference between the inner fire hole a and the minimal fire hole c, thereby avoiding the flame at the inner fire combustion part 112 being too far away from the pot bottom, and the flame at the minimal fire combustion part 151 being too close to the pot bottom, so that the arrangement of the flame in the horizontal height is more reasonable, and the collision between the center of the minimal fire combustion part 151 and the pot bottom is also avoided.

[0052] In the embodiment, the gas inlet end of the minimal fire gas pipe 15 is connected to a device for delivering gas, i.e. a gas valve. The outer fire gas injection pipe 14 and the inner fire gas injection pipe 13 of the burner and the nozzle on the gas valve have a gap, the nozzle injects gas into the injection pipe, so that the surrounding air is also sucked in and mixed with the gas, thereby improving the combustion completeness of the inner fire combustion part 112 and the outer fire combustion part 122. Since the minimal fire combustion part 151 is used to maintain the minimum fire of the burner, the requirements for combustion intensity and combustion completeness are very low, so it is not necessary to use the Bernoulli principle to suck in air for mixing as the injection pipe does, and it can be directly connected. The gas is delivered to the minimal fire combustion part 151 through the minimal fire gas pipe 15, and stable and reliable small fire combustion can be achieved. In addition, it should be noted that in the prior art, when the burner is in a small fire state, the flow rate of the gas injected into the injection pipe by the nozzle is slow, and the air suction force is insufficient, which affects the flow state of the gas in the burner, thereby easily causing the phenomenon of fire loss or extinguishing. In the embodiment, since the minimal fire gas pipe 15 is directly connected to the gas valve, this situation can be effectively avoided.

[0053] In the embodiment, the minimal fire gas pipe 15 extends from the gas inlet end to the gas outlet end, and the cross-sectional area remains unchanged. Since the minimal fire gas pipe 15 is directly connected to the device for delivering gas, i.e. the gas valve, its structure does not need to be designed as a Venturi tube shape as the injection pipe, and the cross-sectional area remaining unchanged can improve the stability of the flow state of the gas in the minimal fire gas pipe 15, thereby ensuring that the combustion of the minimal fire combustion part 151 remains stable.

[0054] Embodiment 2:

[0055] A gas valve, with reference to Figures 5-7 , comprising a valve body 21 and a control component. The valve body 21 is used to supply gas to the burner, and the control component is used to control the gas valve.

[0056] In the embodiment, the control member includes a valve stem 22 assembled to the valve body 21, and a knob 23 arranged on the valve stem 22, and the user can rotate the valve stem 22 through the knob 23 to determine the size of the combustion firepower of the corresponding burner of the control member. The valve body 21 is provided with a fixed scale piece 24 at the top thereof, the top surface of the fixed scale piece 24 is a plane, and a plurality of scale nodes 241 corresponding to the control member are arranged on the top surface of the fixed scale piece 24. The valve stem 22 is provided with a fixed scale unit 25, and the valve stem 22 can rotate around the axis to make the fixed scale unit 25 combine with or separate from the different scale nodes 241.

[0057] In the embodiment, when the user rotates the valve stem 22 through the knob 23 to perform the rotation adjustment, the fixed scale unit 25 and the different scale nodes 241 can be combined to accurately adjust, so that the size of the firepower of the burner can be accurately controlled. When the fixed scale unit 25 and the scale nodes 241 change from the combined state to the separated state with the rotation of the valve stem 22, the user can feel a sudden feeling, so that the user can control more accurately.

[0058] In the embodiment, the control member has a control state in which the valve stem 22 is rotatable, and an original state in which the valve stem 22 is not rotatable, and in the original state, the user cannot rotate the valve stem 22, so that the user can avoid touching the knob 23 by mistake to cause the change of the firepower. The valve stem 22 is axially movable to switch the control state and the original state of the control member, and the control member is provided with a valve stem reset elastic member 2a for resetting the valve stem 22 to the original state. More specifically, when the valve stem 22 is located at the lowest position, the control member is in the control state, the user releases the knob 23, and the valve stem 22 is reset to the highest position under the action of the valve stem reset elastic member 2a, so that the control member is in the original state.

[0059] In the embodiment, the gear node 241 is formed by a concave pit on the surface of the fixed gear 24, and the valve rod 22 is provided with a fixed gear mounting seat 26, and the fixed gear unit 25 is slidably connected to the fixed gear mounting seat 26. The fixed gear unit 25 has a fixed gear state and an adjustment state. The fixed gear state is that the fixed gear unit 25 and the gear node 241 are in a combined state, and the adjustment state is that the fixed gear unit 25 and the gear node 241 are in a separated state. The up and down sliding of the fixed gear unit 25 on the fixed gear mounting seat 26 can switch the fixed gear state and the adjustment state. The fixed gear unit 25 is provided with a fixed gear elastic reset member 2b for driving the fixed gear unit 25 to reset to the fixed gear state. When the fixed gear unit 25 is in the highest position relative to the fixed gear mounting seat 26, it is in the adjustment state, and when the fixed gear unit 25 is in the lowest position relative to the fixed gear mounting seat 26, it is in the fixed gear state. When the fixed gear unit 25 is in the fixed gear state, it is in a clamping fit with the gear node 241, and when it is in the adjustment state, it is in a sliding fit with the surface of the fixed gear 24. The clamping fit enables the fixed gear unit 25 to be combined with the gear node to accurately determine the control of firepower, and the user can apply a certain force to make the fixed gear unit 25 slide from the pit to the surface of the fixed gear 24, i.e. to separate the two.

[0060] In the embodiment, the valve rod 22 is provided with a radial protruding positioning structure 221, and the valve rod reset elastic member 2a is sleeved outside the valve rod 22 and supported at both ends on the positioning structure 221 and the fixed gear mounting seat 26. The valve rod reset elastic member 2a is specifically a compression spring, and the positioning structure 221 can be a clamping spring or other structure that can be connected to the valve rod 22. The fixed gear mounting seat 26 not only serves as a mounting component of the fixed gear unit 25, but also as a support component of the valve rod reset elastic member 2a, which can simplify the structure of the control component.

[0061] In the embodiment, the control component is provided with a minimum and a maximum among a plurality of settings, and the fixed gear has corresponding minimum and maximum gear nodes 241, and the recess degree of the minimum and maximum gear nodes 241 is greater than that of the remaining gear nodes 241. Therefore, when the user rotates to the maximum and the minimum, the feeling of jerk is more obvious than other gears, which can give the user a more explicit control indication.

[0062] In the embodiment, the fixed position mounting base 26 is provided with a through channel 261 extending from top to bottom and having a stepped structure 262, the stepped structure 262 is configured such that the caliber of the upper half of the channel 261 is smaller than that of the lower half, and the channel 261 is provided with a blocking structure 263 at the top, such that the top end of the channel 261 is blocked, and the bottom end forms an opening at the bottom of the fixed position mounting base 26, the fixed position unit 25 includes a fixed position sliding rod 251 slidingly connected in the channel 261, a fixed position bead 252 provided at the bottom end of the fixed position sliding rod 251 and capable of being clamped on the gear node 241, and the top end of the fixed position sliding rod 251 is provided with a flange structure 253 capable of being supported on the stepped structure 262, so that the stepped structure 262 defines the lowest position of the fixed position bead 252, and a fixed position elastic return member 2b is arranged in the channel 261 and has two ends respectively supported on the blocking structure 263 and the flange structure 253, when the user presses the button to make the control part change from the initial state to the control state, and rotates the knob 23, the fixed position bead 252 gradually comes out of the current gear node, the valve rod elastic return member 2a is constantly compressed, and the fixed position bead 252 slides on the surface of the fixed position plate 24, and when the fixed position bead 252 slides to the next gear node, the fixed position bead 252 is clamped in the gear node under the elastic force of the valve rod elastic return member 2a.

[0063] In the embodiment, the blocking structure 263 can be adjusted in position along the extension direction of the channel 261, so as to change the distance between the blocking structure 263 and the stepped structure 262, change the initial compression amount of the fixed position elastic return member 2b, and change the reset elastic force of the fixed position elastic return member 2b, so that the user can adaptively adjust according to his own preference.

[0064] In the embodiment, more specifically, the blocking structure 263 is threadedly connected with the inner wall of the channel 261, the user can adjust the position of the blocking structure 263 in the channel 261 by rotating the blocking structure 263, and the user can conveniently adjust.

[0065] In the embodiment, the bottom of the fixed position sliding rod 251 is provided with a mounting hole 2511 matching the shape of the fixed position bead 252, and the diameter of the opening of the mounting hole 2511 is smaller than the diameter of the fixed position bead 252, so that the fixed position bead 252 cannot come out of the mounting hole 2511, and the fixed position bead 252 can roll on the surface of the fixed position plate 24, and compared with the sliding movement, the rolling movement has smaller resistance, and the user has a more smooth feeling when rotating the control.

[0066] The gas valve of the embodiment has a valve body 21 with a minimum fire gas outlet 253, an inner fire gas nozzle 251 and an outer fire gas nozzle 252, wherein the minimum fire gas outlet 253 is connected with the minimum fire gas pipe 15, the inner fire gas nozzle 251 injects gas into the inner fire gas injection pipe 13, and the outer fire gas nozzle 252 injects gas into the outer fire gas injection pipe 14.

[0067] Embodiment 3:

[0068] A gas stove comprises 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.

[0069] In the embodiment, the control component of the gas valve is at the minimum position, the minimum fire combustion part 151 is in the combustion state, and the inner fire combustion part 112 and the outer fire combustion part 122 are in the extinguishing state. That is, at the minimum position, the minimum fire gas outlet 253 of the valve body 21 continuously inputs gas into the minimum fire gas pipe 15, while the inner fire gas nozzle 251 and the outer fire gas nozzle 252 stop injecting gas into the inner fire gas injection pipe 13 and the outer fire gas injection pipe 14.

[0070] In the embodiment, the inner fire combustion part 112 and the outer fire combustion part 122 of the burner at the minimum position are both in the extinguishing state, and the stable delivery of gas through the minimum fire combustion pipe and the stable combustion at the minimum fire combustion part 151 can ensure the stable control of the minimum fire, avoid the situation that the user needs to re-ignite due to improper operation when the user controls the fire of the burner to be small, and play the role of igniting.

[0071] In the embodiment, the outer fire combustion part 122 and the inner fire combustion part 112 are in the combustion state when the control component is at any position from the maximum position to the middle position, and the outer fire combustion part 122 is in the extinguishing state and the inner fire combustion part 112 is in the combustion state when the control component is at the rest positions. The minimum fire combustion part 151 is in the extinguishing state at least when the control component is at any position from the maximum position to the middle position, and can be ignited at a small position from the middle position to the minimum position, and can be extinguished at a position where the inner fire combustion part 112 can be stably combusted.

[0072] Finally, it should be noted that: the above implementation cases are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing implementation cases, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing implementation cases, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the present application.

Claims

1. A burner, characterized in that, It includes an internal combustion chamber (11) and an internal combustion ejector pipe (13) connected to each other, and an external combustion chamber (12) and an external combustion ejector pipe (14) connected to each other. The inner fire gas chamber (11) has a top that is seamlessly connected and has an inner fire hole (a), the outer fire gas chamber (12) has a top that is seamlessly connected and has an outer fire hole (b), and the top of the outer fire gas chamber (12) surrounds the top of the inner fire gas chamber (11).

2. The burner according to claim 1, characterized in that, The inner fire gas chamber (11) includes an inner fire gas shell (111) with an opening at the top and an inner fire combustion part (112) integrally formed at the opening. The outer fire gas chamber (12) includes an outer fire gas shell (121) with an opening at the top and an outer fire combustion part (122) integrally formed at the opening.

3. The burner according to claim 2, characterized in that, The inner fire gas casing (111) is an aluminum alloy inner fire gas casing, the outer fire gas casing (121) is an aluminum alloy outer fire gas casing, the inner fire combustion part (112) is a copper alloy inner fire combustion part, and the outer fire combustion part (122) is a copper alloy outer fire combustion part.

4. The burner according to claim 3, characterized in that, The inner fire gas casing (111) and the inner fire combustion part (112) are formed with a connecting edge formed by 3D metal printing, and the outer fire gas casing (121) and the outer fire combustion part (122) are formed with a connecting edge formed by 3D metal printing.

5. The burner according to claim 3, characterized in that, The inner fire gas casing (111) and the inner fire combustion part (112) are formed with a connecting edge formed by bimetallic secondary die casting, and the outer fire gas casing (121) and the outer fire combustion part (122) are formed with a connecting edge formed by bimetallic secondary die casting.

6. The burner according to claim 2, characterized in that, The top of the outer fire gas casing (121) has a plurality of circumferentially spaced and independently arranged openings, and the outer fire combustion part (122) is integrally formed at each opening.

7. The burner according to claim 6, characterized in that, 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.

8. The burner according to any one of claims 1-7, characterized in that, It also includes a microflame gas pipe (15), and a microflame hole (c) is provided at the center of the top of the inner flame gas chamber (11). The microflame gas pipe (15) extends into the inner flame gas chamber (11), and its outlet end is connected to the center of the top of the inner flame gas chamber (11) and communicates with the microflame hole (c).

9. The burner according to claim 8, characterized in that, The inlet end of the microfire gas pipe (15) is used to connect to the equipment for conveying gas, and the microfire gas pipe (15) extends from the inlet end to the outlet end with its cross-sectional area remaining unchanged.

10. A gas stove, characterized in that, The invention includes the burner according to any one of claims 1-9 and a gas valve, the gas valve being used to control the gas supplied to the burner.

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