Double-premixing burner and gas stove thereof

Abstract

The utility model discloses a double-premixing burner. The double-premixing burner comprises a furnace end assembly and a first-stage premixing assembly connected to the furnace end assembly. The furnace end assembly comprises an injection pipe, and the injection pipe is provided with a second-stage premixing cavity and a natural injection hole communicating with the second-stage premixing cavity. The first-stage premixing assembly comprises an air blower and a first-stage premixer connected to the air blower, and an outlet of the first-stage premixer communicates with the second-stage premixing cavity. According to the double-premixing burner and the gas stove thereof, the natural air injection structure and the air blowing mechanism are combined, and meanwhile, the adjusting assembly is arranged at the inlet end of the natural air injection structure and used for adjusting the natural air inflow according to fluctuation of the air blowing mechanism, so that the fluctuation influence of the air blowing mechanism is reduced, and the combustion efficiency is improved. And meanwhile, the defect that the air inflow is insufficient due to the fact that only a natural air injection structure is adopted is overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a double premix burner and a gas stove thereof. Background Art

[0002] In existing gas stoves, the burner has a large demand for air when burning gas, so a natural entrainment structure or a blast structure is usually set up to premix the burner air with the gas so that the gas burns fully. However, the natural entrainment structure relies on the gas injection power to drive the air for entrainment premixing. The gas injection power is limited, and the amount of entrained air is small, which can easily cause incomplete combustion. The blast structure relies on the fan to blast air for premixing. The power is strong and there is no problem of insufficient power. However, in actual applications, the gas has fluctuations in composition and air pressure, which leads to the problem that the blast air volume does not match the air required for actual gas combustion. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a double premix burner and a gas stove thereof to solve the technical problem of insufficient natural air volume of the prior burner.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] In the first aspect, an embodiment of the utility model provides a dual-premixing burner, which includes: a burner head assembly and a first-level premixing assembly connected to the burner head assembly; the burner head assembly includes an ejector tube, the ejector tube is provided with a second-level premixing chamber and a natural ejection hole connected to the second-level premixing chamber; the first-level premixing assembly includes a blower and a first-level premixer connected to the blower, and the outlet of the first-level premixer is connected to the second-level premixing chamber.

[0006] Wherein, a first-stage premixer is provided in the first-stage premixing chamber, and a gas nozzle is also provided in the first-stage premixing chamber, and the gas nozzle is connected to the chamber wall of the first-stage premixing chamber.

[0007] Wherein, the gas injection direction of the gas nozzle is the same as the blowing direction of the blower.

[0008] Wherein, the front end of the ejector pipe is provided with an ejector waiting pipe end, the natural ejection hole is opened at the ejector waiting pipe end, and the outlet end of the first-stage premixer is connected to the ejector waiting pipe end.

[0009] Among them, a connecting part radially protrudes from the inner wall of the natural injection hole, and an injection waiting pipe port connected to the secondary premixing chamber is provided on the connecting part. The outer wall of the connecting part and the inner wall of the natural injection hole together enclose an arc-shaped mixing air inlet.

[0010] Wherein, an adjustment component is also provided at the end where the natural injection hole is located, and the adjustment component is used to adjust the opening of the natural injection hole.

[0011] Among them, a connecting portion radially protrudes from the inner wall of the natural injection hole, and the connecting portion is provided with an injection waiting pipe port connected to the secondary premixing chamber, and the output port of the primary premixer is connected to the injection waiting pipe port.

[0012] Wherein, the adjustment component includes: an adjustment baffle, a connecting column and an elastic member, the adjustment baffle and the elastic member are both inserted into the connecting column, the connecting column is connected to the injection pipe port, one end of the elastic member abuts against the adjustment baffle, and the other end abuts against the connecting column, the inner side surface of the adjustment baffle is attached to the end surface of the mixed air inlet; the adjustment baffle is rotated to change the opening of the natural injection hole, so as to adjust the size of the input natural air.

[0013] Wherein, the regulating baffle is provided with at least two air regulating holes which are arranged at intervals, and the air regulating holes are arranged in alignment with the mixing air inlet.

[0014] Wherein, a radially extending paddle is also provided on the edge of the adjusting baffle.

[0015] In a second aspect, an embodiment of the utility model provides a gas stove, which includes a dual premix burner as described in any one of the above items and a flame divider assembly connected to the burner head assembly.

[0016] The double premix burner and gas stove of the utility model combine a natural air injection structure with a blower mechanism, and at the same time, an adjustment component is arranged at the inlet end of the natural air injection structure, for adjusting the natural air intake amount according to the fluctuation of the blower mechanism, thereby reducing the fluctuation influence of the blower mechanism, and overcoming the defect of insufficient air intake amount caused by only using the natural air injection structure.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a double premixed burner according to an embodiment of the utility model.

[0019] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of local A in the middle.

[0020] Figure 3This is a schematic diagram of an exploded view of a double premixed burner according to an embodiment of the present utility model.

[0021] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part B in the middle.

[0022] Figure 5 This is an overall cross-sectional view of a double premixed burner according to an embodiment of the present utility model.

[0023] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of local C in the middle.

[0024] Figure 7 for Figure 5 Schematic diagram of the local D enlarged structure in the middle.

[0025] Figure 8 This is a partial structural schematic diagram of the adjustment component of the double premixed burner according to an embodiment of the utility model.

[0026] Fig. 9 This is a schematic diagram of the internal airflow direction of a double premixed burner according to an embodiment of the present utility model.

[0027] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure of local E in the middle.

[0028] Description of reference numerals:

[0029] Double premix burner 100, ignition distributor assembly 1, burner head assembly 2, adjustment assembly 3, primary premixer 4, blower 5, gas nozzle 6, ejector tube 20, ejector standby tube end 21, natural ejector hole 22, connecting portion 23, secondary premixing chamber 24, adjustment baffle 31, elastic member 32, connecting column 33, primary premixing chamber 41, air inlet 42, outlet 43, air outlet 51, air outlet 61, ejector standby tube port 231, docking surface 232, sheet body 311, air adjustment hole 312, paddle 313, connecting hole 314, limit portion 331, through cavity 332. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "resin", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] Embodiment 1

[0038] In existing gas stoves, the burner gas has a large demand for air when burning, and a natural entrainment structure or a blast structure is usually set to premix the burner air with the gas to ensure full combustion of the gas. However, the natural entrainment structure relies on the gas injection power to drive the air for induced air premixing. The gas injection power is limited, and the amount of induced air is small, which can easily cause incomplete combustion. The blast structure relies on the fan to blow air for premixing. The power is strong and there is no problem of insufficient power. However, in actual applications, the gas has fluctuations in composition and air pressure, which leads to the problem that the blast air volume does not match the air required for actual gas combustion. Based on the existing technical problems, this embodiment provides the following solutions.

[0039] like Figures 1 to 10 As shown, the dual premix burner 100 of this embodiment comprises: a burner assembly 2 and a primary premix assembly connected to the burner assembly 2; the burner assembly 2 comprises an ejector pipe 20, the ejector pipe 20 is provided with a secondary premix chamber 24 and a natural ejector hole 22 connected to the secondary premix chamber 24; the primary premix assembly comprises a blower 5 and a primary premixer 4 connected to the blower 5, the outlet 43 of the primary premixer 4 is connected to the secondary premix chamber 24. In this embodiment, the natural air ejection structure and the blast mechanism are combined to solve the problem of insufficient input air volume caused by the existing single air supply mechanism, so that the gas burns more fully.

[0040] In this embodiment, the burner head assembly 2 includes two ejector tubes 20 arranged in parallel, and the two ejector tubes 20 arranged in parallel can simultaneously input premixed gas to the ignition distributor assembly 1 to improve the firepower. In other embodiments, multiple ejector tubes 20 can be provided, and the corresponding first-level premixing assemblies can be provided in multiple groups or one group. When only one group of first-level premixing assemblies is provided, the group of first-level premixing assemblies is provided with multiple first-level premixing outlets, and the multiple first-level premixing outlets respectively input the first-level premixed gas to one of the ejector tubes 20.

[0041] Please refer again Figure 5 and Figure 7The first-stage premixer 4 is provided with a first-stage premixing chamber 41, and the first-stage premixing chamber 41 is also provided with a gas nozzle 6, and the gas nozzle 6 is connected to the cavity wall of the first-stage premixing chamber 41. Here, the gas nozzle 6 is used to input gas into the first-stage premixing chamber 41, which can prevent air backflow and gas leakage. Preferably, the gas nozzle 6 is arranged close to the side where the blower 5 is located so that the gas and air are fully mixed.

[0042] The air outlet 51 of the blower 5 is connected to the air inlet 42 of the primary premixer 4, and the gas nozzle 6 is located behind the air inlet 42. The air input by the blower 5 is first mixed with the gas input by the gas nozzle 6 in the primary premixing chamber 41, and the mixed gas enters the secondary premixing chamber 24 of the ejector tube 20 again. The process of first mixing in the primary premixing chamber 41 of the primary premixer 4 is called primary premixing.

[0043] Please refer again Figure 7 , the gas injection direction of the gas nozzle 6 is the same as the blowing direction of the blower 5. The gas injection direction is in the same direction as the blowing direction, which can not only prevent air backflow, but also enhance the flow rate of the primary mixed airflow and improve the firepower. Specifically, the gas outlet 61 of the gas nozzle 6 is arranged toward the primary premixing chamber 41, and the gas nozzle 6 is fixedly connected to the side wall of the primary premixer 4, and a gap is left between the part thereof extending into the primary premixing chamber 41 and the primary premixing chamber 41, so that the blower 5 can input air into the primary premixing chamber 41. In other embodiments, in order to reduce the influence of the gas nozzle 6 on the blowing volume, the nozzle opening of the gas nozzle 6 only slightly extends into the primary premixing chamber 41.

[0044] The outlet 43 of the first-stage premixer 4 is also provided with a premixing nozzle, and the outlet of the premixing nozzle is connected to the second-stage premixing chamber 24. The premixing nozzle has a one-way ventilation characteristic, thereby avoiding the phenomenon of air backflow when the natural air injection structure and the first-stage premixed gas are premixed for the second time. If the first-stage premixed air flow pressure is sufficient, the premixing nozzle provided at the outlet end of the first-stage premixer 4 can also be removed.

[0045] Among them, the front end of the ejector tube 20 is provided with an ejector waiting tube end 21, the natural ejector hole 22 is opened at the ejector waiting tube end 21, and the outlet 43 of the first-stage premixer 4 is connected to the ejector waiting tube end 21. That is, in this embodiment, the natural ejector hole 22 and the outlet 43 of the first-stage premixer 4 are both located at the ejector waiting tube end 21 of the ejector tube 20, so that the first-stage premixed gas after the first-stage premixing is mixed with the airflow introduced by the natural ejector hole 22 as soon as possible when entering the second-stage premixing chamber 24, so that the mixing is more complete. That is, the natural ejector hole 22 and the outlet 43 of the first-stage premixer 4 are arranged as close to each other as possible.

[0046] In another embodiment, the outlet 43 of the first-stage premixer 4 can also be arranged at other positions of the second-stage premixing chamber 24. In this case, the outlet 43 of the first-stage premixer 4 needs to be arranged behind the natural ejection hole 22, so that the external air ejected by the natural ejection pipe 20 first enters the second-stage premixing chamber 24, and then is secondary mixed with the first-stage premixed gas. The rear mentioned here refers to the flow direction of the premixed airflow. In the flow direction of the airflow, the position closer to the starting point of the airflow is called the front, and the position relatively farther from the starting point is called the rear.

[0047] Please refer again Figure 2 and Figure 3 The end where the natural ejection hole 22 is located is also provided with an adjustment component 3, and the adjustment component 3 is used to adjust the opening of the natural ejection hole 22. That is, the adjustment component 3 is arranged at the end face of the ejection waiting pipe end 21, and the corresponding natural ejection hole 22 is opened at the end face of the ejection waiting pipe end 21.

[0048] like Figure 4 As shown, a connection portion 23 radially protrudes from the inner wall of the natural ejection hole 22, and an ejection waiting pipe port 231 connected to the secondary premixing chamber 24 is provided on the connection portion 23, and the outlet 43 of the primary premixer 4 is connected to the ejection waiting pipe port 231. From the end face of the ejection waiting pipe end 21, the cross section of the natural ejection hole 22 is approximately in a U-shaped arc shape, and the ejection waiting pipe port 231 is located in the middle of the U-shaped shape. The natural ejection hole 22 is partially arranged around the outside of the ejection waiting pipe port 231, so that the natural air input from the natural ejection hole 22 is tubular when entering the secondary premixing chamber 24, and is surrounded by the outside of the primary premixed airflow, thereby further improving the adequacy of the secondary premixing.

[0049] The outer wall of the connecting portion 23 and the inner wall of the natural ejection hole 22 together enclose an arc-shaped mixed air inlet. A butt joint surface 232 is provided at the end of the connecting portion 23, and the butt joint surface 232 is flush with the end surface of the mixed air inlet.

[0050] In this embodiment, the cross-section of the natural ejection hole 22 is arc-shaped, preferably annular, so that the adjustment component 3 has better linearity when adjusting its opening size.

[0051] Please refer again Figure 2 , Figure 3 and Figure 8The regulating assembly 3 includes: an regulating baffle 31, a connecting column 33 and an elastic member 32. The regulating baffle 31 and the elastic member 32 are both arranged on the connecting column 33. The connecting column 33 is connected to the ejection waiting pipe port 231. One end of the elastic member 32 abuts against the regulating baffle 31, and the other end abuts against the connecting column 33. The inner side surface of the regulating baffle 31 abuts against the end surface of the mixed air inlet. The regulating baffle 31 is rotated to change the size of the natural ejection hole 22, so as to adjust the amount of natural air input. When the regulating baffle 31 rotates, it can partially or completely cover the opening of the natural ejection hole 22, thereby changing the opening size of the natural ejection hole 22 and changing the amount of ejected air.

[0052] A planar docking surface 232 is provided at the end of the connecting portion 23, and the inner wall of the natural injection hole 22 and the outer wall of the connecting portion 23 together enclose an arc-shaped mixed air inlet. The docking surface 232 is flush with the end surface of the mixed air inlet, so that the adjustment baffle 31 can fully fit the end surface of the natural injection hole 22, and the injection pipe port 231 extends to the docking surface 232.

[0053] Specifically, at least two air regulating holes 312 are arranged at intervals on the regulating baffle 31. The regulating baffle 31 is rotated to change the overlap size between the air regulating holes 312 and the natural injection holes 22, thereby changing the opening size of the natural injection holes 22. The regulating baffle 31 is a circular piece.

[0054] Specifically, the adjustment baffle 31 includes: a sheet body 311, the air adjustment holes 312 are arranged at intervals on the sheet body 311, and the air adjustment holes 312 arranged at intervals divide the sheet body 311 into an open hole part and a shielding part. The air adjustment holes 312 are located opposite to the opening of the natural injection hole 22. A connecting hole 314 is arranged at the center of the sheet body 311, and the connecting column 33 is inserted or screwed to the injection pipe port 231 after passing through the connecting hole 314. A radially extending paddle 313 is also arranged at the edge of the adjustment baffle 31 to facilitate manual rotation adjustment.

[0055] The elastic member 32 is a spring, a through cavity 332 is provided in the connecting column 33, an external thread is provided on the outer wall of the front end, and a limit portion 331 is protruded from the outside of the rear end. After the spring is sleeved on the connecting column 33, the front end of the spring abuts against the adjustment baffle 31, and the rear end abuts against the limit portion 331. The other side of the adjustment baffle 31 abuts against the end face of the ejection waiting tube end 21. When the adjustment baffle 31 is assembled, the adjustment baffle 31 fits the end face of the ejection waiting tube end 21, and the other side is elastically squeezed by the elastic member 32, so that the adjustment baffle 31 always fits tightly against the end face. When it is necessary to adjust the opening of the natural ejection hole 22, the operating paddle 313 rotates, driving the adjustment baffle 31 to rotate around the connecting column 33, changing the overlap between the air adjustment hole 312 and the natural ejection hole 22, thereby changing the air intake.

[0056] The air regulating holes 312 disposed on the sheet-like body 311 are symmetrically arranged with respect to the connecting holes, and the sheet-like body 311 is a circular baffle.

[0057] Please refer again Figure 6 The outer end of the connecting pipe 33 is connected to the outlet 43 of the first-stage premixer 4, and the inner end of the connecting pipe 33 is plugged or screwed to the ejection pipe port 231.

[0058] Please refer again Fig. 9 and Fig.10 , the arrows in the figure indicate the directions of the outflows in the double premix burner 100. Specifically, when the double premix burner 100 is started, the blower 5 is first turned on to deliver air to the primary premixer 4. At the same time or slightly later, the gas nozzle 6 is started to input gas. At this time, the gas and air are mixed in the primary premixing chamber 41, which is referred to as primary premixing. The gas after primary premixing enters the secondary premixing chamber 24 of the ejector tube 20 through the through cavity 332 in the connecting column 33. The jet power of the primary premixed gas flow drives the gas in the external environment to enter the secondary premixing chamber 24 from the natural ejection hole 22. Thereafter, the air entering through the natural ejection hole 22 is mixed again with the primary premixed gas in the secondary premixing chamber 24 to form a secondary premixed gas. This process is referred to as secondary premixing. Finally, the gas after secondary premixing enters the igniter assembly 1 to be burned.

[0059] Compared with the existing single air injection structure, the double premix burner 100 of this embodiment has an additional blowing mechanism, which significantly increases the amount of air input for premixing, and makes up for the defect of insufficient air input of the single air injection structure. At the same time, an adjustment component 3 is arranged on the end face of the injection pipe 20 to solve the influence of the blowing mechanism on the gas composition or air pressure fluctuation. When the primary premixed gas processed by the blower 5 and the primary premixer 4 fluctuates due to the gas composition and air pressure, the adjustment baffle 31 can be manually adjusted to change the size of the natural injection hole, and adjust the stability and sufficient mixing of the premixed gas finally input to the ignition distributor assembly 1. Specifically, when the gas composition (concentration) input from the gas nozzle 6 is insufficient, the adjustment baffle 31 is rotated to reduce the orifice size of the natural injection hole 22, and the amount of air input to the natural injection hole 22 is reduced, and vice versa. When the gas pressure output from the gas nozzle 6 is insufficient, the adjustment baffle 31 is also rotated to reduce the input gas volume to ensure the firepower at the ignition distributor assembly 1, and vice versa.

[0060] The dual-premix burner of the present embodiment combines a natural air injection structure with a blower mechanism, and at the same time, an adjustment component is provided at the inlet end of the natural air injection structure, for adjusting the natural air intake amount according to the fluctuation of the blower mechanism to match the gas required for combustion, thereby reducing the influence of the fluctuation of the blower mechanism and overcoming the defect of insufficient air intake amount caused by only using the natural air injection structure.

[0061] Embodiment 2

[0062] This embodiment provides a gas stove, which includes the dual premix burner 100 as described in the first embodiment, and a flame distributor assembly 1 connected to the burner head assembly 2 of the dual premix burner 100 .

[0063] The gas stove of this embodiment has the advantages of both the natural injection structure and the blowing mechanism, and solves the adverse effects of the fluctuation of the blowing mechanism by adjusting the components, so that the blowing air volume matches the air required for actual gas combustion.

[0064] The above examples are only used to further illustrate the technical content of the utility model, so that readers can understand it more easily, but it does not mean that the implementation methods of the utility model are limited to this. Any technical extension or re-creation made based on the utility model is protected by the utility model. The protection scope of the utility model shall be based on the claims.

Claims

1. A double premix burner, characterized in that: include: A burner head assembly and a primary premixing assembly connected to the burner head assembly; the burner head assembly includes an ejector tube, the ejector tube is provided with a secondary premixing chamber and a natural ejector hole connected to the secondary premixing chamber; the primary premixing assembly includes a blower and a primary premixer connected to the blower, the outlet of the primary premixer is connected to the secondary premixing chamber.

2. The double premix burner according to claim 1, characterized in that: A first-stage premixing chamber is provided in the first-stage premixer, and a gas nozzle is also provided in the first-stage premixing chamber.

3. The double premix burner according to claim 2, characterized in that: The gas injection direction of the gas nozzle is the same as the blowing direction of the blower.

4. The double premix burner according to claim 1, characterized in that: The front end of the ejector pipe is provided with an ejector waiting pipe end, the natural ejection hole is opened in the ejector waiting pipe end, and the outlet end of the first-stage premixer is connected to the ejector waiting pipe end.

5. The double premix burner according to any one of claims 1 to 4, characterized in that: An adjusting component is also provided at the end where the natural ejection hole is located, and the adjusting component is used to adjust the opening of the natural ejection hole.

6. The double premix burner according to claim 5, characterized in that: A connecting portion radially protrudes from the inner wall of the natural injection hole, and an injection waiting pipe port connected to the secondary premixing chamber is provided on the connecting portion. The outer wall of the connecting portion and the inner wall of the natural injection hole together enclose a mixing air inlet, and the outlet of the primary premixer is connected to the injection waiting pipe port.

7. The double premix burner according to claim 6, characterized in that: The end of the connecting portion is provided with a butt joint surface, and the ejection pipe opening extends to the butt joint surface.

8. The double premix burner according to claim 7, characterized in that: The adjustment component includes: an adjustment baffle, a connecting column and an elastic member, the adjustment baffle and the elastic member are both inserted into the connecting column, the inner side surface of the adjustment baffle is attached to the end surface of the mixed air inlet, the inner end of the connecting column is connected to the injection pipe port, one end of the elastic member abuts against the adjustment baffle, and the other end abuts against the connecting column; the adjustment baffle is rotated to change the opening of the natural injection hole, so as to adjust the amount of input air.

9. The double premix burner according to claim 8, characterized in that: The regulating baffle is provided with at least two air regulating holes arranged at intervals, and the air regulating holes are arranged in alignment with the mixing air inlet.

10. A gas stove, characterized in that: The gas stove comprises the dual premix burner as claimed in any one of claims 1 to 9 and a flame divider assembly connected to the burner head assembly.

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