A burner, gas stove and control method of a gas stove

Abstract

This invention belongs to the field of combustion technology and discloses a burner, a gas stove, and a control method for the gas stove. The burner includes an outer ring burner cap and a lifting drive mechanism. The outer ring burner cap includes an upper burner cap and a lower burner cap that are joined vertically. The upper burner cap has an upper joining portion, and the lower burner cap has a lower joining portion. The upper and lower joining portions are arranged vertically opposite each other. The lifting drive mechanism drives the upper burner cap to rise and fall relative to the lower burner cap, so that the upper and lower joining portions can be spaced to form a flame stabilizing groove. The lifting drive mechanism adjusts the width of the flame stabilizing groove. The control method includes: based on the combustion state, controlling the operation of the lifting drive mechanism to drive the upper burner cap to rise and fall to adjust the width of the flame stabilizing groove. This invention enables the burner state to match the combustion state, improving combustion stability and combustion efficiency.

Description

Technical Field

[0001] This invention relates to the field of combustion technology, and in particular to a burner, a gas stove, and a method for controlling the gas stove. Background Technology

[0002] The burner is a device used to ignite and burn gas. It is the core component of a gas stove, and the combustion performance of the burner directly affects the performance of the gas stove.

[0003] Existing burners typically include a furnace head, a flame distributor, and a burner cap arranged sequentially from bottom to top. The burner cap usually consists of an inner ring burner cap and an outer ring burner cap spaced apart from the inner ring burner cap. The inner ring burner cap has multiple inner ring flame holes spaced apart circumferentially, and the outer ring burner cap has multiple outer ring flame holes spaced apart circumferentially. Both the inner and outer ring burner caps are located on the flame distributor, and the mixed gas is supplied to the inner and outer ring flame holes through the inner and outer ring gas distribution chambers on the flame distributor, respectively.

[0004] Existing burners have fixed outer and inner ring burner holes, and the parameter settings of the inner and outer ring burner holes are basically matched with the gas supply state after combustion is stable. This leads to a mismatch between the gas flow state in the burner and the parameters of the burner holes before combustion is stable, such as immediately after ignition or during flame adjustment. This causes the gas to flow out of the burner holes faster, resulting in unstable combustion, affecting combustion stability, and thus affecting the stability and reliability of the gas stove. Summary of the Invention

[0005] The purpose of this invention is to provide a burner, a gas stove, and a control method for the gas stove, which can effectively solve the problem of unstable combustion caused by the inability to adjust the outer ring flame holes in existing systems, and improve the combustion stability and reliability of the burner.

[0006] A burner includes an outer ring flame cover, the outer ring flame cover including an upper flame cover and a lower flame cover that are spliced ​​together vertically, the upper flame cover having an upper splicing portion and the lower flame cover having a lower splicing portion, the upper splicing portion and the lower splicing portion being arranged vertically opposite each other;

[0007] The burner also includes a lifting drive mechanism, which drives the upper flame cap to rise and fall relative to the lower flame cap so that the upper splice and the lower splice can be spaced apart to form a flame stabilizing groove, and the lifting drive mechanism adjusts the width of the flame stabilizing groove.

[0008] As an optional technical solution for a burner, the lifting drive mechanism can drive the upper flame cap to move until the upper splicing part and the lower splicing part are in contact, so that the upper splicing part and the lower splicing part surround and form an outer ring flame hole, and multiple outer ring flame holes are arranged at intervals along the circumference of the outer ring flame cap.

[0009] As an optional technical solution for a burner, the upper splicing part and the lower splicing part are provided with flame grooves corresponding to each other, and the flame grooves of the upper splicing part and the flame grooves of the lower splicing part together form the outer ring flame hole.

[0010] As an optional technical solution for a burner, the lifting drive mechanism has multiple lifting drive components capable of vertical extension and retraction. The multiple lifting drive components are arranged at intervals along the circumference of the outer ring burner cover, and the upper end of the lifting drive component abuts against or is connected to the upper burner cover.

[0011] And / or, the burner further includes a temperature detection element for detecting the temperature of the gas distribution seat on the underside of the upper burner cap, the lower burner cap, or the outer ring burner cap.

[0012] A gas stove, including a burner as described above.

[0013] A control method for a gas stove, applied to the control of the gas stove as described above, the control method comprising: controlling the operation of the lifting drive mechanism based on the combustion state, so that the lifting drive mechanism drives the upper burner cover to rise and fall to adjust the width of the flame stabilizer groove.

[0014] As an optional technical solution for the control method, the control method further includes: when the combustion state is the initial combustion state, controlling the upper flame cap to rise relative to the lower flame cap until the width of the flame stabilizing groove is a preset flame stabilizing width, wherein the preset flame stabilizing width is greater than the minimum width of the flame stabilizing groove;

[0015] And / or, when the combustion state is a stable combustion state, the flame stabilizing groove is controlled to be at its minimum width.

[0016] As an optional technical solution for control methods, the preset flame stabilization width is 1.5mm to 3mm.

[0017] As an optional technical solution for control methods, within a preset time range after the burner is ignited, the current combustion state is determined to be the initial combustion state;

[0018] Alternatively, when the detected temperature at the preset temperature detection point is lower than the preset temperature, the current combustion state is determined to be the initial combustion state.

[0019] As an optional technical solution for control methods, when the combustion state is a combustion heating state, the width of the flame stabilizing groove is controlled to be d = [A + (BT) / B] mm, where T is the detection temperature of the preset temperature detection point, A = 0.15 mm to 1 mm, and B is the temperature of the preset temperature detection point when the combustion is stable.

[0020] And / or, when the combustion state is a firepower adjustment state, the width of the flame stabilizing groove is controlled to be d1, where d1 = 0.15mm to 1mm.

[0021] The beneficial effects of this invention are:

[0022] The burner provided by this invention uses a lifting drive mechanism to move the upper burner cap up and down relative to the lower burner cap. This allows the width of the flame stabilizing groove between the upper and lower splicing parts to be adjusted according to the combustion state, thereby regulating the speed at which the gas-air mixture flows out of the flame stabilizing groove. This enables the width of the flame stabilizing groove to match different combustion states, improving combustion stability and reliability while ensuring combustion efficiency, thus enhancing the user experience of the burner.

[0023] The gas stove provided by the present invention, by employing the above-mentioned burner, can improve the combustion stability and reliability of the gas stove and increase combustion efficiency.

[0024] The gas stove control method provided by this invention can adjust the width of the flame stabilizing groove based on the combustion state, thereby improving combustion stability and reliability, and increasing combustion efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the burner provided in Embodiment 1 of the present invention;

[0026] Figure 2 This is a cross-sectional view of the burner provided in Embodiment 1 of the present invention in a flame stabilization state;

[0027] Figure 3 yes Figure 2 A magnified view of a section at point I;

[0028] Figure 4 This is a partial cross-sectional view of the burner in the assembled state according to Embodiment 1 of the present invention;

[0029] Figure 5 This is a partial cross-sectional view of the burner in the assembled state according to Embodiment 2 of the present invention;

[0030] Figure 6 This is a flowchart of the gas stove control method provided in Embodiment 3 of the present invention;

[0031] Figure 7 This is a flowchart of the control method for a gas stove provided in Embodiment 4 of the present invention.

[0032] In the picture:

[0033] 100. Outer ring burner cap; 200. Gas distributor seat; 201. Inner ring premixing chamber; 202. Outer ring premixing chamber; 203. Inner wall; 204. Outer wall; 300. Inner ring burner cap; 301. Inner ring burner hole; 302. Cavity; 400. Lifting drive component; 500. Temperature detection component;

[0034] 1. Upper flame cap; 11. Upper main body; 12. Inner positioning ring; 13. Upper splicing part;

[0035] 2. Lower flame cap; 21. Lower main body; 22. Outer positioning ring; 23. Lower splicing part;

[0036] 3. Outer ring flame hole; 31. Flame groove; 311. Main groove section; 312. Widened groove section; 4. Flame stabilizing groove; 5. Outer ring mixing chamber. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] Example 1

[0042] This embodiment provides a gas stove to improve the combustion stability and reliability of the burner in the gas stove and increase combustion efficiency.

[0043] like Figures 1 to 4 As shown, the gas stove includes a burner, which includes a burner head, a gas distribution seat 200, and a burner cap assembly arranged sequentially from bottom to top. The gas distribution seat 200 has an inner ring premixing chamber 201 at its upper end and an outer ring premixing chamber 202 spaced around the inner ring premixing chamber 201. A nozzle is provided on the burner head to supply gas to the inner ring premixing chamber 201 and the outer ring premixing chamber 202. The burner assembly includes an inner ring burner 300 and an outer ring burner 100 spaced around the outer side of the inner ring burner 300. The inner ring burner 300 has a cavity 302 with a lower opening and an inner ring flame hole 301 arranged circumferentially. The outer ring burner 100 has an annular outer ring mixing chamber 5, and an outer ring flame hole 3 is arranged circumferentially on the outer side of the outer ring burner 100. The outer ring flame hole 3 communicates with the outer ring premixing chamber 202 through the outer ring mixing chamber 5, and the inner ring flame hole 301 communicates with the inner ring premixing chamber 201 through the cavity 302.

[0044] In this embodiment, the outer ring burner cap 100 includes an upper burner cap 1 and a lower burner cap 2 that are joined together vertically. The lower end of the upper burner cap 1 has an upper joining portion 13, and the upper end of the lower burner cap 2 has a lower joining portion 23. The upper joining portion 13 and the lower joining portion 23 are arranged opposite to each other, and the upper joining portion 13 and the lower joining portion 23 can close together to form an outer ring burner hole 3. The burner also includes a lifting drive mechanism, which drives the upper burner cap 1 to rise and fall relative to the lower burner cap 2, so that the upper joining portion 13 and the lower joining portion 23 can be spaced apart to form a flame stabilizing groove 4. The lifting drive mechanism adjusts the width of the flame stabilizing groove 4.

[0045] The burner provided in this embodiment uses a lifting drive mechanism to drive the upper burner cap 1 to rise and fall relative to the lower burner cap 2. This allows the width of the flame stabilizing groove 4 between the upper splice portion 13 and the lower splice portion 23 to be adjusted according to the combustion state. This adjusts the speed and flow rate of the gas mixture flowing out of the flame stabilizing groove 4, thereby enabling the width of the flame stabilizing groove 4 to match different combustion states. This ensures combustion efficiency while improving combustion stability and reliability, and ultimately enhancing combustion efficiency.

[0046] Furthermore, the lifting drive mechanism can drive the outer ring flame cap 100 to switch between a spliced ​​state and a flame-stabilized state. When the outer ring flame cap 100 is in the spliced ​​state, the upper splicing part 13 and the lower splicing part 23 are fitted together and form an outer ring flame hole 3. Multiple outer ring flame holes 3 are spaced apart along the circumference of the outer ring flame cap 100. When the outer ring flame cap 100 is in the flame-stabilized state, the upper splicing part 13 and the lower splicing part 23 are spaced apart so that an annular flame-stabilizing groove 4 is formed between the upper flame cap 1 and the lower flame cap 2, and the width of the flame-stabilizing groove 4 can be adjusted.

[0047] That is, in this embodiment, there is a minimum distance between the upper splice portion 13 and the lower splice portion 23, i.e., the flame stabilizing groove 4 has a minimum width of 0. Therefore, when the burner is not in use, the upper flame cap 1 can be supported on the lower flame cap 2 without always being supported on the lifting drive mechanism, reducing or avoiding the stress on the lifting drive mechanism when the burner is not in use, improving the service life of the lifting drive mechanism, and preventing external dirt from entering between the upper flame cap 1 and the lower flame cap 2, which would make cleaning difficult, thus improving the cleaning convenience and installation reliability of the outer ring flame cap 100.

[0048] In other embodiments, the upper splicing part 13 and the lower splicing part 23 are always spaced apart, that is, the minimum width dmin of the flame stabilizing groove 4 is greater than 0, and when the flame stabilizing groove 4 is at its minimum width, the flame stabilizing groove 4 forms an annular outer ring fire hole 3.

[0049] For ease of description, the distance between the upper splicing part 13 and the lower splicing part 23 is defined as d, where d is the width of the flame stabilizing groove 4.

[0050] The upper splicing portion 13 and the lower splicing portion 23 extend upwards at an incline from the inside out. This causes the outer ring flame hole 3 and the flame stabilizing groove 4, formed by the combination of the upper splicing portion 13 and the lower splicing portion 23, to both extend upwards at an incline from the inside out. This allows the premixed gas to flow upwards at an incline when exiting the outer ring flame hole 3 or the flame stabilizing groove 4, ensuring upward combustion of the flame and thus improving the stability of flame combustion. In other words, the distance between the upper splicing portion 13 and the lower splicing portion 23 is the minimum distance between the two splicing surfaces.

[0051] Let α be the angle between the upper splicing part 13 and the lower splicing part 23 in the vertical direction, and let h be the height to which the upper flame cover 1 is raised by the lifting drive mechanism. Then d = h × sinα, that is, the width of the flame stabilizing groove 4 is linearly positively correlated with the lifting stroke of the upper flame cover 1 when it is in the splicing state.

[0052] In this embodiment, the upper splicing part 13 and the lower splicing part 23 are each provided with a flame groove 31, and multiple flame grooves 31 are spaced apart along the circumference of the outer ring flame cap 100. When the outer ring flame cap 100 is in the spliced ​​state, the flame grooves 31 of the upper splicing part 13 and the flame grooves 31 of the lower splicing part 23 are directly opposite each other and together form the outer ring flame hole 3, through which the premixed gas flows out. When the outer ring flame cap 100 is in the flame stabilization state, the premixed gas flows out through the flame stabilization groove 4 and the flame groove 31.

[0053] Furthermore, the flame groove 31 is a semi-cylindrical groove, so that the enclosed outer ring flame hole 3 is a cylindrical hole.

[0054] To ensure the lifting stability of the upper flame cover 1, the lifting drive mechanism includes multiple lifting drive components 400. The multiple lifting drive components 400 are arranged at intervals along the circumference of the outer ring flame cover 100, so that the lifting drive mechanism has multiple support points on the outer ring flame cover 100, ensuring the driving stability and reliability of the lifting drive components 400 on the outer ring flame cover 100.

[0055] Furthermore, the gas distributor 200 has an inner wall 203 and an outer wall 204 that enclose the outer ring premixing chamber 202. The outer wall 204 is coaxial and spaced apart outside the inner wall 203. The inner end of the upper burner cap 1 is supported on the inner wall 203, and the lower burner cap 2 is supported on the outer wall 204 to ensure the stability and reliability of the outer ring burner cap 100 on the gas distributor 200.

[0056] The upper flame cover 1 includes an annular upper main body portion 11. The cross-section of the upper main body portion 11 is a V-shaped structure with the opening facing downwards, or a U-shaped structure. An upper splicing portion 13 is formed on the lower side of the outer end of the upper main body portion 11. An inner positioning ring portion 12 extends downwards from the inner end of the upper main body portion 11. The inner positioning ring portion 12 is fitted onto the outer side of the inner enclosure wall 203, and the upper end of the inner enclosure wall 203 abuts against the upper main body portion 11 to achieve axial and radial installation positioning. The lifting drive component 400 abuts against the inner positioning ring portion 12 or the upper main body portion 11.

[0057] The lower fire cover 2 includes a lower main body 21, and the upper end of the lower main body 21 has a lower splicing part 23. The lower end of the lower main body 21 extends downward to form an outer positioning ring 22, which is sleeved on the inner side of the outer perimeter wall 204, and the upper end of the outer perimeter wall 204 abuts against the lower main body 21 to achieve axial and radial installation positioning.

[0058] The upper flame cover 1 has a positioning groove, which corresponds to the lifting drive component 400. The upper end of the lifting drive component 400 is inserted into the positioning groove and abuts against the bottom of the positioning groove to prevent the lifting drive component 400 from separating from the upper flame cover 1, thus ensuring the stability and reliability of the fit between the upper flame cover 1 and the lifting drive component 400.

[0059] To better control the burner's operation, the gas stove includes a controller, and the burner also includes a temperature detection element 500. The temperature detection element 500 is used to detect the temperature at preset temperature detection points on the burner. Both the temperature detection element 500 and the lifting drive mechanism are communicatively connected to the controller. The temperature detection element 500 is used to detect the temperature of the outer ring burner cap 100 or the gas distributor 200, and the controller controls the operation of the lifting drive mechanism based on the temperature detected by the temperature detection element 500.

[0060] It is worth noting that the combustion temperature is different when the burner is in different combustion stages. Therefore, the combustion stage can be determined by the temperature value detected by the temperature detection element 500, so as to determine whether the upper burner cover 1 needs to be raised or lowered.

[0061] Preferably, the temperature detection element 500 detects the temperature of the bottom or outer side of the gas distributor 200, or the temperature detection element 500 detects the temperature of the lower burner cap 2, to avoid the upper burner cap 1 being too hot and affecting the service life of the temperature detection element 500, and to improve the selection flexibility of the temperature detection element 500. In other embodiments, the temperature detection element 500 can also detect the temperature of the upper burner cap 1. The position of the temperature detection element 500 can be set according to requirements, and this embodiment does not limit the specific setting position of the temperature detection element 500.

[0062] Other structural configurations of the burner and gas stove can be made with reference to existing technologies, which are not the focus of this invention and are not limited here.

[0063] Example 2

[0064] This embodiment provides a burner, and the burner provided in this embodiment has the same basic structure as the burner provided in Embodiment 1, with only some differences in settings. This embodiment will not repeat the contents that are the same as those in Embodiment 1.

[0065] like Figure 5 As shown, in this embodiment, the wall of each flame groove 31 is partially expanded outward to form a widened groove portion 312. That is, the flame groove 31 includes a straight-extending main groove portion 311, and the wall of the main groove portion 311 is provided with the widened groove portion 312. This causes the enclosed outer ring flame hole 3 to be partially widened between its two ends to form a flow-expanding section. The main groove portion 311 is preferably, but not limited to, a semi-cylindrical groove, and the widened groove portion 312 is preferably, but not limited to, a semi-annular groove arranged around the main groove portion 311.

[0066] Because each outer ring flame hole 3 is locally widened between its two ends to form a diffusion section, this diffusion section increases the contact area between the mixed gas and the inner wall of the outer ring flame hole 3. This increases the residence time of the premixed gas flow through the diffusion section, increases the Darmquerel number of the combustion reaction, and reduces incomplete combustion products, thereby reducing pollutants generated during combustion. Furthermore, the presence of the diffusion section causes the mixed gas velocity to decrease due to the shearing effect of the diffusion section wall at the junction of the diffusion section and the main orifice of the outer ring flame hole 3. This results in a relatively higher velocity of the mixed gas flow in the unwidened area of ​​the outer ring flame hole 3 and a relatively lower velocity in the widened area. In the velocity gradient field, according to Bernoulli's principle, a secondary flow phenomenon will be generated perpendicular to the flow direction, thereby promoting the mixing between the fuel gas and air, improving the premixing uniformity of the mixed gas flowing out of the outer ring flame hole 3, and thus improving the combustion completeness and stability. Furthermore, when the flow velocity of the mixed gas is high, the airflow in the expansion section will undergo boundary layer separation, resulting in stable vortices in the expansion section, which enhances the anchoring effect on the flame, provides ignition for combustion, avoids flame lift-off due to excessively high mixed gas flow velocity, and also reduces the probability of backfire caused by insufficient gas supply pressure, further enhancing combustion stability.

[0067] Example 3

[0068] This embodiment provides a control method for a gas stove, which can control the operating state of the burner according to the combustion state, thereby improving the combustion stability and efficiency of the burner. The structure of the burner can refer to the structure in the above embodiment, and will not be described again in this embodiment.

[0069] like Figure 6 As shown, in this embodiment, the control method of the gas stove includes: controlling the operation of the lifting drive mechanism based on the combustion state, so that the lifting drive mechanism drives the upper burner cover 1 to rise and fall to adjust the width of the flame stabilizer groove 4.

[0070] The burner control method provided in this embodiment can adjust the width of the flame stabilizing groove 4 according to the combustion state, so that the width of the flame stabilizing groove 4 can match the combustion state, thereby better meeting the combustion requirements and ensuring combustion stability and reliability.

[0071] To simplify the control of the gas stove, the control method of this embodiment includes: when the combustion state is the initial combustion state, controlling the upper burner cover 1 to rise relative to the lower burner cover 2 until the width of the flame stabilizing groove 4 is a preset flame stabilizing width, and the preset flame stabilizing width is greater than the minimum width of the flame stabilizing groove 4.

[0072] Since the overall temperature of the burner is low when the burner is first ignited, and it is in a cold combustion state, the premixed gas flows out of the burner at a relatively fast speed. Therefore, in this combustion state, controlling the upper flame cover 1 to rise so that the width of the flame stabilizing groove 4 is the preset flame stabilizing width can reduce the gas flow rate, so that some gas flows from the flame stabilizing groove 4 to the outside and forms a flame stabilizing layer, thereby improving the stability of the combustion flame.

[0073] In this embodiment, the preset flame stabilization width is 1.5mm to 4mm, preferably 1.8mm to 2.5mm, to avoid the flame stabilization groove 4 being too wide, which would result in a low gas flow rate and thus cause backfire. At the same time, it avoids the flame stabilization groove 4 being too narrow, which would not achieve the flame stabilization effect.

[0074] Understandably, the specific value of the preset flame stabilization width can be set according to the specific structure of the burner and the type of gas.

[0075] In this embodiment, the control method further includes: determining the current combustion state as the initial combustion state within a preset time range after burner ignition. That is, within the preset time range after ignition, the current state is defaulted to the initial combustion state, thus eliminating the need for other detection methods to determine whether it is the initial combustion state, making the control simple and easy to implement.

[0076] In this embodiment, the gas stove includes a timer and a controller. The timer and the lifting drive mechanism are both connected to the controller. When the controller detects ignition, it controls the timer to start timing.

[0077] Furthermore, the preset start-up time is 15s to 60s, preferably 25s to 45s, and can be 15s, 20s, 25s, 30s, 35s, 40s, 45s, 50s, 55s, 60s, etc.

[0078] In other embodiments, the control method includes: determining the current combustion state as the initial combustion state when the detected temperature at the preset temperature detection point is lower than the preset temperature. That is, a preset temperature detection point is set on the outer ring burner cap 100 or the gas distribution seat 200 to detect the temperature in real time. When the detected temperature at the preset temperature detection point is lower than the preset temperature, it indicates that the burner is still in a cold state, and it can be determined that this is the initial combustion state.

[0079] It is worth noting that the temperature varies at different preset temperature detection points, therefore the preset temperature should be confirmed based on the specific location of the preset temperature detection point. The temperature at each preset temperature detection point is detected using a temperature sensor installed at that location. For example, when the temperature detection point is located at the bottom of the lower burner cap 2, the gas distributor 200, or on the outside of the gas distributor 200, the preset temperature value can be 320K to 400K.

[0080] Furthermore, the control method also includes: when the combustion state is a stable combustion state, controlling the flame stabilizing groove 4 to be at its minimum width.

[0081] When combustion is stable, the burner is in thermal equilibrium, allowing the mixture of gas and air to flow out through the outer ring flame hole 3, resulting in concentrated flame heat intensity and higher combustion efficiency.

[0082] Specifically, in this embodiment, when the combustion state is a stable combustion state, the upper burner cap 1 and the lower burner cap 2 are controlled to fit together.

[0083] In this embodiment, the temperature at a preset temperature detection point is used to determine whether the combustion is in a stable state. Specifically, if the temperature value at the preset temperature detection point is higher than the preset temperature value and the temperature fluctuation range is less than the preset fluctuation range within a preset detection time, then the combustion is determined to be in a stable state.

[0084] Furthermore, the temperature fluctuation range is -10K to 10K to avoid misjudgment caused by external combustion fluctuations or temperature detection errors, which could affect the assessment of combustion stability.

[0085] The control method also includes: when the combustion state is the firepower adjustment state, controlling the width of the flame stabilizing groove 4 to be d1, where d = 0.15mm to 1mm.

[0086] During the use of a gas stove, users may need to adjust the burner's flame intensity. Adjusting the width of the flame stabilizer groove 4 to d1 can stabilize the gas flow rate during flame intensity adjustments, resulting in more stable combustion. Preferably, d1 = 0.25mm to 0.5mm.

[0087] Furthermore, the control method also includes: within a preset detection time, if the detected temperature at the preset temperature detection point is higher than the preset temperature and fluctuates up and down, and the temperature fluctuation at the preset temperature detection point exceeds the preset fluctuation range, it is determined that the system is in a firepower adjustment state.

[0088] The settings for preset temperature and preset fluctuation range can be referenced as described above, and will not be repeated in this embodiment.

[0089] After the initial combustion state, there is a situation where the temperature of the outer ring flame cap 100 has not yet reached the stable combustion state, that is, there is a state where the outer ring flame cap 100 continues to heat up. Therefore, in this embodiment, the control method further includes: when the combustion state is a state of continuous heating, controlling the width d of the flame stabilizing groove 4, d = [A + (BT) / B] mm. Where T is the detection temperature of the preset temperature detection point, A = 0.15~1, and B is the temperature of the preset temperature detection point when the combustion is stable;

[0090] That is, under this setting, when the temperature value detected by the preset temperature detection point is higher, the airflow velocity of the premixed gas is slower. At this time, the width of the flame stabilizing groove 4 is smaller, so that the airflow velocity in the burner matches the width of the flame stabilizing groove 4, thereby improving combustion stability.

[0091] It is worth noting that B can be obtained through burner testing or based on experience, and the value of B is related to the location of the temperature detection point. For example, when the preset temperature detection point is located at the bottom of the outer ring premixing chamber 202, B is 620K to 700K. A is preferably 0.25 to 0.5.

[0092] Furthermore, the control method includes: when the detected temperature at the preset temperature detection point is higher than the preset temperature within the preset detection time, and the detected temperature at the preset temperature detection point continues to rise, it is determined that the current state is combustion heating.

[0093] Example 4

[0094] This embodiment provides a control method for a gas stove, and the control method provided in this embodiment is a further refinement of the control method provided in Embodiment 3.

[0095] As shown in the figure, specifically in this embodiment, the control method includes the following steps:

[0096] Step S1: Gas stove in standby mode;

[0097] Step S2: Determine whether to ignite. If not, return to step S1. If yes, execute step S2.

[0098] Step S3: Adjust the width of the flame stabilization groove 4 to the preset flame stabilization width;

[0099] Step S4: Determine whether the running time after ignition is less than the preset running time. If yes, return to step S3; otherwise, proceed to step S5.

[0100] Step S5: Determine whether the combustion is in a stable state. If yes, proceed to step S6; otherwise, proceed to step S7.

[0101] Step S6: Adjust the width of the flame stabilizer groove 4 to the minimum width, and then execute step S10;

[0102] Step S7: Determine whether the combustion and heating state is in progress. If yes, proceed to step S8; otherwise, proceed to step S9.

[0103] Step S8: Adjust the width of the flame stabilizer groove 4 to d = [A + (BT) / B] mm, and then execute step S10;

[0104] Step S9: Adjust the width of the flame stabilizer groove 4 to d1, and then execute step S10;

[0105] Step S10: Determine whether to turn off the ignition. If not, return to step S5. If yes, proceed to step S11.

[0106] Step S11: After adjusting the width of the flame stabilizer groove 4 to the minimum width, return to step S1.

[0107] That is, in this embodiment, when the running time after ignition is less than the preset running time, it indicates that the current time is within the preset time range after ignition, and the current combustion state is the initial combustion state. Since all combustion should eventually reach the combustion stable state, after the initial combustion state ends, it is first determined whether the combustion stable state has been reached, which simplifies the judgment logic. If it is determined that the combustion stable state has not been reached, it is first determined whether the combustion is in the combustion heating state, which helps to simplify the judgment conditions and reduce the difficulty of detection and control.

[0108] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A burner comprising an outer ring flame cap (100), characterized in that, The outer ring flame cap (100) includes an upper flame cap (1) and a lower flame cap (2) that are spliced ​​together vertically. The upper flame cap (1) has an upper splicing part (13), and the lower flame cap (2) has a lower splicing part (23). The upper splicing part (13) and the lower splicing part (23) are both arranged vertically opposite each other. The burner also includes a lifting drive mechanism, which drives the upper flame cap (1) to rise and fall relative to the lower flame cap (2) so that the upper splice (13) and the lower splice (23) can be spaced apart to form a flame stabilizing groove (4), and the lifting drive mechanism adjusts the width of the flame stabilizing groove (4).

2. The burner according to claim 1, characterized in that, The lifting drive mechanism can drive the upper flame cover (1) to move until the upper splicing part (13) and the lower splicing part (23) fit together, so that the upper splicing part (13) and the lower splicing part (23) surround and form an outer ring flame hole (3), and the outer ring flame hole (3) is provided in multiple intervals along the circumference of the outer ring flame cover (100).

3. The burner according to claim 2, characterized in that, The upper splicing part (13) and the lower splicing part (23) are provided with flame grooves (31) corresponding to each other. The flame grooves (31) of the upper splicing part (13) and the flame grooves (31) of the lower splicing part (23) together form the outer ring fire hole (3).

4. The burner according to any one of claims 1-3, characterized in that, The lifting drive mechanism has multiple vertically extendable lifting drive components (400), which are arranged circumferentially along the outer ring flame cap (100). The upper end of the lifting drive component (400) abuts against or is connected to the upper flame cap (1). And / or, the burner further includes a temperature detection element (500) for detecting the temperature of the gas distribution seat (200) under the upper burner cap (1), the lower burner cap (2), or the outer ring burner cap (100).

5. A gas stove, characterized in that, Including the burner as described in any one of claims 1-4.

6. A method for controlling a gas stove, characterized in that, The control method applied to the gas stove as described in claim 5 includes: controlling the operation of the lifting drive mechanism based on the combustion state, so that the lifting drive mechanism drives the upper burner cover (1) to rise and fall to adjust the width of the flame stabilizer groove (4).

7. The control method according to claim 6, characterized in that, The control method further includes: when the combustion state is the initial combustion state, controlling the upper flame cap (1) to rise relative to the lower flame cap (2) to the width of the flame stabilizing groove (4) to a preset flame stabilizing width, wherein the preset flame stabilizing width is greater than the minimum width of the flame stabilizing groove (4); And / or, when the combustion state is a stable combustion state, the flame stabilizing groove (4) is controlled to be at its minimum width.

8. The control method according to claim 7, characterized in that, The preset flame stabilization width is 1.5mm to 4mm.

9. The control method according to claim 7, characterized in that, Within a preset time range after the burner is ignited, the current combustion state is determined to be the initial combustion state; Alternatively, when the detected temperature at the preset temperature detection point is lower than the preset temperature, the current combustion state is determined to be the initial combustion state.

10. The control method according to any one of claims 6-9, characterized in that, When the combustion state is a combustion heating state, the width of the flame stabilizing groove (4) is controlled to be d, d=[A+(BT) / B]mm, where T is the detection temperature of the preset temperature detection point, A=0.15~1, and B is the temperature of the preset temperature detection point in the combustion stable state; And / or, when the combustion state is a firepower adjustment state, the width of the flame stabilizing groove (4) is controlled to be d1, where d1 = 0.15 mm to 1 mm.

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