Burner, burner and burner control method

Abstract

The present invention relates to the technical field of kitchen appliances, and in particular to a burner, a burner, and a control method for the burner. The burner includes a burner, and the burner includes a support assembly, in which an outer ring airflow channel, an inner ring airflow channel, and an air buffer channel are provided. The outer ring airflow channel and the inner ring airflow channel are both configured to provide a mixture of gas and air; the concentration detection assembly is used to detect the gas concentration in the air buffer channel; the anti-backflow mechanism includes a baffle and a drive assembly, and the drive assembly can drive the baffle to move between an open position and a closed position according to the detection result of the concentration detection assembly. In the open position, the air buffer channel is connected to the outer ring airflow channel and the inner ring airflow channel respectively, and in the closed position, the air buffer channel is disconnected from the outer ring airflow channel and the inner ring airflow channel respectively. The burner can prevent gas from flowing back into the air buffer channel to prevent gas leakage, and can also prevent gas backflow from disturbing the flame, thereby ensuring stable combustion.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a stove head, a burner and a burner control method. Background Art

[0002] Gas stoves are very commonly used kitchen appliances, and their core component is the burner. The existing burner includes a burner head, a nozzle and a fan, and an inner ring mixing chamber, an outer ring mixing chamber and an air channel are formed in the burner head. The inner ring mixing chamber and the outer ring mixing chamber respectively have an inlet and an outlet (i.e., a fire hole for generating flames), and nozzles are respectively provided at the inlet of the inner ring mixing chamber and the outer ring mixing chamber. The air inlet of the air channel is connected to the fan, and the air outlet is provided next to the fire hole. When the burner is working, after the gas is sprayed into the corresponding inlet by the nozzle, primary air is naturally injected into the outer ring mixing and inner ring mixing chambers. The primary air and gas are mixed in the corresponding mixing chamber. At the same time, the fan blows air into the air channel, and the air is discharged from the air outlet and reaches the inner ring fire hole and the outer ring fire hole to replenish the secondary air.

[0003] However, in some cases, the fan may not be able to work normally due to a malfunction. At this time, the mixed gas containing fuel gas may flow back along the air channel, which not only causes combustion losses but also creates a safety hazard.

[0004] Therefore, there is an urgent need for a burner, a burner and a burner control method to solve the above technical problems. Summary of the Invention

[0005] One purpose of the present invention is to provide a burner head. When the gas flows back through the air buffer channel, the anti-backflow mechanism can block the outlet of the air buffer channel to prevent the gas from continuing to enter the air buffer cavity, thereby preventing gas leakage, and preventing the gas backflow from disturbing the flame, thereby ensuring stable combustion.

[0006] A second object of the present invention is to provide a burner that, by providing the burner head, can avoid gas leakage and ensure stable combustion.

[0007] A third object of the present invention is to provide a burner control method, which, when applied to the above-mentioned burner, can avoid gas leakage and ensure a stable combustion flame.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] A stove head, comprising:

[0010] A support assembly having an outer ring airflow channel, an inner ring airflow channel, and an air buffer channel therein, wherein the outer ring airflow channel and the inner ring airflow channel are configured to provide a mixture of gas and air, and are in communication with the exterior of the support assembly through the outer ring fire hole and the inner ring fire hole, respectively. The inlet of the air buffer channel is configured to communicate with the fan assembly;

[0011] A concentration detection component, used for detecting the gas concentration in the air buffer channel;

[0012] a backflow prevention mechanism, including a baffle and a drive assembly;

[0013] The driving component can drive the baffle to move between an open position and a blocked position according to the detection result of the concentration detection component. In the open position, the outlet of the air buffer channel is connected to the outer ring airflow channel and the inner ring airflow channel respectively. In the blocked position, the outlet of the air buffer channel is disconnected from the outer ring airflow channel and the inner ring airflow channel respectively.

[0014] As an optional solution, the burner head further includes a check valve, which is arranged at the inlet of the air buffer channel and is configured to only allow airflow to flow into the air buffer channel in one direction.

[0015] As an optional solution, the air buffer channel includes an outer ring air branch channel and an inner ring air branch channel, the inlet of the outer ring air branch channel is configured to communicate with the outer ring fan, and the outlet of the outer ring air branch channel is used to communicate with the outer ring air flow channel;

[0016] The inlet of the inner ring air branch channel is configured to communicate with the inner ring fan, and the outlet of the inner ring air branch channel is used to communicate with the inner ring air flow channel.

[0017] As an optional solution, the support assembly includes:

[0018] The burner body has an outer ring mixing channel, an inner ring mixing channel and an air buffer channel, wherein the outer ring mixing channel and the inner ring mixing channel are both configured for primary mixing of gas and air;

[0019] The fire divider is covered on the burner body, and an outer ring mixing chamber and an inner ring mixing chamber are provided on the fire divider. The outer ring fire hole and the inner ring fire hole are both arranged on the fire divider. The outer ring mixing chamber is respectively connected with the outer ring mixing channel and the outer ring fire hole, and the inner ring mixing chamber is respectively connected with the inner ring mixing channel and the inner ring fire hole.

[0020] As an optional solution, the air buffer channel includes an outer ring air outlet and an inner ring air outlet, the outer ring air outlet is used to communicate with the outer ring mixing chamber, and the inner ring air outlet is used to communicate with the inner ring mixing chamber;

[0021] The baffle is arranged between the burner body and the flame distributor, and the driving component can drive the baffle to rotate to block the outer ring air outlet and the inner ring air outlet, or avoid the outer ring air outlet and the inner ring air outlet.

[0022] As an optional solution, the baffle is provided with an outer ring avoidance port and an inner ring avoidance port, and when the outer ring avoidance port is opposite to the outer ring air outlet, the inner ring avoidance port is opposite to the inner ring air outlet.

[0023] As an optional solution, a through hole extending in the up and down directions is provided on the burner body, and the anti-backflow mechanism also includes a transmission member, one end of which is connected to the output end of the drive assembly, and the other end passes through the through hole and is connected to the baffle.

[0024] As an optional solution, the ratio of the cross-sectional area of ​​the outer ring air outlet to the cross-sectional area of ​​the inner ring air outlet is 1.1 to 8:1.

[0025] As an optional solution, the outer ring mixing channel has at least two outer ring air outlets, and the outer ring mixing chamber has a corresponding number of outer ring air inlets, so the air buffer channel has a corresponding number of outer ring air outlets, and the outer ring air outlets, the outer ring air inlets and the outer ring air outlets are arranged in a one-to-one correspondence; and / or

[0026] The inner ring mixing channel has at least two inner ring air outlets, the inner ring mixing chamber has a corresponding number of inner ring air inlets, and the air buffer channel has a corresponding number of inner ring air outlets. The inner ring air outlets, the inner ring air inlets and the inner ring air outlets are arranged in a one-to-one correspondence.

[0027] As an optional solution, the outer ring mixing channel includes an outer ring ejector pipe and an outer ring primary mixing chamber that are connected to each other, the inlet of the outer ring ejector pipe is configured to be connected to the outer ring nozzle and the external air respectively, the outer ring primary mixing chamber is connected to the outer ring mixing chamber, and the cross-sectional area of ​​the outer ring primary mixing chamber gradually decreases along the flow direction of the airflow; and / or

[0028] The inner ring mixing channel comprises an inner ring ejector pipe and an inner ring primary mixing chamber which are connected to each other, the inlet of the inner ring ejector pipe is configured to communicate with the inner ring nozzle and the external air respectively, the inner ring primary mixing chamber is connected to the inner ring mixing chamber, and the cross-sectional area of ​​the inner ring primary mixing chamber gradually decreases along the flow direction of the airflow; and / or

[0029] The air buffer channel includes an air intake pipe and an air buffer chamber that are connected to each other. The inlet of the air intake pipe is configured to be connected to the fan assembly. The air buffer chamber is respectively connected to the outer ring mixing chamber and the inner ring mixing chamber. Along the direction of air flow, the cross-sectional area of ​​the air buffer chamber gradually decreases.

[0030] A burner comprises a blower assembly, an inner ring nozzle, an outer ring nozzle and the burner head, wherein the blower assembly is used to blow air into the air buffer channel, the inner ring nozzle is used to spray gas into the inner ring airflow channel, and the outer ring nozzle is used to spray gas into the outer ring airflow channel.

[0031] A burner control method is applied to the burner, and the burner control method includes:

[0032] Step 10: Acquire gas flow information entering the outer ring airflow channel and the inner ring airflow channel;

[0033] Step 20, judging whether the conditions for starting the fan assembly are met based on the gas flow information in step 10;

[0034] Step 30: If yes, turn on the fan assembly and output a corresponding blast speed according to the amount of gas sprayed by the outer ring nozzle and the inner ring nozzle; if no, keep the fan assembly turned off;

[0035] Step 40, determining whether the gas concentration in the air buffer channel is zero;

[0036] Step 50: If yes, obtain the gas flow information entering the outer ring airflow channel and the inner ring airflow channel; if no, drive the baffle from the open position to the blocked position by the drive assembly;

[0037] Step 60, judging whether the conditions for shutting down the fan assembly are met based on the gas flow information obtained in step 50;

[0038] Step 70: If yes, turn off the fan assembly; if not, return to step 40.

[0039] As an optional solution, in step 20, whether the condition for starting the fan assembly is met is: the time for the gas flow to change from zero to greater than zero is greater than a first preset time, and the first preset time is 5 to 30 seconds.

[0040] As an optional solution, in step 60, whether the condition for shutting down the fan assembly is met is: the time for the gas flow to change from greater than zero to equal to zero is greater than a second preset time, and the second preset time is 5 to 30 seconds.

[0041] As an optional solution, in step 70, if yes, the fan assembly is turned off after a third preset time, and the third preset time is 1-10s.

[0042] The beneficial effects of the present invention are:

[0043] When the burner of the present invention is operating normally, the outer ring nozzle and the inner ring nozzle spray gas into the outer ring airflow channel and the inner ring airflow channel respectively, and inject primary air by natural injection, and the primary air and gas are mixed once in the corresponding airflow channel. The fan assembly blows secondary air into the air buffer channel, and the secondary air then enters the outer ring airflow channel and the inner ring airflow channel respectively, so that the secondary air and the gas after the primary mixing are mixed twice. When the gas after the secondary mixing is discharged from the outer ring fire hole and the inner ring fire hole for combustion, the air outside the burner body can also be mixed and burned three times with the gas after the secondary mixing. The burner of the present invention can achieve three-way mixing of gas and air, thereby improving the uniformity and sufficiency of the mixing of gas and air. When the fan assembly fails and can no longer supply air to the air buffer channel, gas will flow back into the air buffer channel. At this time, the concentration detection assembly can identify this, so that the drive assembly can quickly adjust the baffle to the blocking position, thereby preventing the gas from continuing to enter the air buffer chamber. This not only prevents gas leakage, but also prevents the gas from continuing to flow back into the air buffer chamber and disturbing the flames at the outer and inner ring fire holes, thereby ensuring stable combustion.

[0044] The burner of the present invention can avoid gas leakage, ensure stable combustion, and avoid the problem of flameout by providing the above-mentioned burner head.

[0045] The burner control method of the present invention, when applied to the above-mentioned burner, can avoid gas leakage, ensure the stability of the combustion flame, and avoid the problem of flameout. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of a burner provided in a specific embodiment of the present invention;

[0047] Figure 2 is a schematic diagram of a burner in a decomposed state provided by a specific embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram of a first burner body provided by a specific embodiment of the present invention when viewed from above;

[0049] Figure 4 It is a schematic diagram of a fire distributor provided by a specific embodiment of the present invention when viewed from above;

[0050] Figure 5is a schematic cross-sectional view of a first burner body provided by a specific embodiment of the present invention;

[0051] Figure 6 yes Figure 5 AA section view in;

[0052] Figure 7 This is a schematic diagram of a first burner body and a backflow prevention mechanism in a coordinated state provided by a specific embodiment of the present invention;

[0053] Figure 8 yes Figure 5 BB cross-section in;

[0054] Figure 9 is a schematic cross-sectional view of a second burner body provided by a specific embodiment of the present invention;

[0055] Figure 10 yes Figure 9 CC cross-section in;

[0056] Figure 11 is a top view of a burner provided in a specific embodiment of the present invention;

[0057] Figure 12 It is a flow chart of a burner control method provided in a specific embodiment of the present invention.

[0058] In the picture:

[0059] 10. Burner head; 11. Burner head body; 111. Outer ring mixing channel; 1111. Outer ring ejector tube; 1112. Outer ring primary mixing chamber; 1113. Outer ring air outlet; 112. Inner ring mixing channel; 1121. Inner ring ejector tube; 1122. Inner ring primary mixing chamber; 1123. Inner ring air outlet; 113. Air buffer channel; 1131. Air inlet pipe; 1132. Air buffer chamber; 1133. Outer ring air outlet; 1134. Inner ring air outlet; 1135. Outer ring air outlet duct; 1136, inner ring air branch duct; 114, through-hole; 12, ignition distributor; 121, outer ring mixing chamber; 122, inner ring mixing chamber; 123, outer ring fire hole; 124, inner ring fire hole; 125, outer ring air inlet; 126, inner ring air inlet; 13, check valve; 14, concentration detection component; 15, backflow prevention mechanism; 151, baffle; 1511, outer ring avoidance port; 1512, inner ring avoidance port; 1513, inner ring gas avoidance port; 152, drive component; 153, transmission component;

[0060] 20. Fan assembly; 21. Outer ring fan; 22. Inner ring fan;

[0061] 31. Outer ring damper assembly; 32. Inner ring damper assembly;

[0062] 40. Gas flow sensor;

[0063] 50. Controller. DETAILED DESCRIPTION

[0064] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0065] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0066] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0067] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0068] This embodiment provides a burner and a gas burner, such as Figure 1 As shown, the burner includes a burner head 10, a blower assembly 20, an outer ring damper assembly 31, an inner ring damper assembly 32, an outer ring nozzle and an inner ring nozzle (not shown).

[0069] like Figures 2 to 6As shown, the burner head 10 includes a support assembly, a concentration detection assembly 14, and a backflow prevention mechanism 15. The support assembly defines an outer ring airflow channel, an inner ring airflow channel, and an air buffer channel 113. The outer ring nozzle communicates with the inlet of the outer ring airflow channel via the outer ring damper assembly 31. The outer ring nozzle can spray gas into the outer ring airflow channel and introduce primary air into the channel through natural entrainment, allowing the primary air and gas to mix within the channel. The outlet of the outer ring airflow channel communicates with the exterior of the support assembly via the outer ring flame hole 123. The inner ring nozzle communicates with the inlet of the inner ring airflow channel via the inner ring damper assembly 32. The inner ring nozzle can spray gas into the channel and introduce primary air into the channel through natural entrainment, allowing the primary air and gas to mix within the channel. The outlet of the inner ring airflow channel communicates with the exterior of the support assembly via the inner ring flame hole 124. The fan assembly 20 can blow secondary air into the air buffer channel 113 from its inlet. The concentration detection assembly 14 is used to detect the gas concentration in the air buffer channel 113. The backflow prevention mechanism 15 includes a baffle 151 and a drive assembly 152. The drive assembly 152 can drive the baffle 151 between an open position and a blocked position based on the detection results of the concentration detection assembly 14. In the open position, the outlet of the air buffer channel 113 is connected to the outer ring airflow channel and the inner ring airflow channel respectively. In the blocked position, the outlet of the air buffer channel 113 is disconnected from the outer ring airflow channel and the inner ring airflow channel respectively.

[0070] When the burner of this embodiment is operating normally, the outer ring nozzle and the inner ring nozzle spray gas into the outer ring airflow channel and the inner ring airflow channel respectively, and inject primary air by natural injection, so that the primary air and gas are mixed once in the corresponding airflow channel. The fan assembly 20 blows secondary air into the air buffer channel 113, and the secondary air then enters the outer ring airflow channel and the inner ring airflow channel respectively, so that the secondary air and the gas after the primary mixing are mixed twice. When the gas after the secondary mixing is discharged from the outer ring fire hole 123 and the inner ring fire hole 124 for combustion, the air outside the burner body 11 can also be mixed and burned three times with the gas after the secondary mixing. The burner of this embodiment can achieve three-way mixing of gas and air, thereby improving the uniformity and sufficiency of the mixing of gas and air. When the fan assembly 20 fails and can no longer supply air to the air buffer channel 113, gas will flow back into the air buffer channel 113. At this time, the concentration detection assembly 14 can identify this, so that the drive assembly 152 can quickly drive the baffle 151 to the blocking position, thereby preventing the gas from continuing to enter the air buffer chamber 1132. This not only prevents gas leakage, but also prevents the gas from continuously flowing back into the air buffer chamber 1132 and disturbing the flames at the outer fire ring hole 123 and the inner fire ring hole 124, thereby ensuring stable combustion and avoiding flameout problems.

[0071] like Figures 1 to 3 As shown, in this embodiment, the support assembly includes a burner body 11 and a flame distributor 12, and the flame distributor 12 is covered on the burner body 11. The burner body 11 is provided with an outer ring mixing channel 111, an inner ring mixing channel 112 and an air buffer channel 113. The outer ring mixing channel 111 and the inner ring mixing channel 112 are both used for the primary mixing of gas and air. The inlet of the outer ring mixing channel 111 is connected to the outer ring nozzle through the outer ring damper assembly 31. Specifically, as shown in FIG. Figure 1 As shown, a fan-shaped notch is provided at the entrance of the outer ring mixing channel 111. The outer ring damper assembly 31 includes a damper blade and a mounting tube. The outer ring nozzle is connected to the mounting tube so as to be able to spray gas into the outer ring mixing channel 111. Rotating the damper blade can open the fan-shaped notch. When the outer ring nozzle sprays gas into the outer ring mixing channel 111, the air flow velocity inside the outer ring mixing channel 111 is greater than the external air, thereby forming a negative pressure environment. Therefore, the external air can enter the outer ring mixing channel 111 through the fan-shaped notch, that is, realizing the natural injection of primary air. The entrance of the inner ring mixing channel 112 is connected to the inner ring nozzle through the inner ring damper assembly 32. The structure and working principle of the inner ring nozzle and the inner ring damper assembly 32 are the same as those of the outer ring nozzle and the outer ring damper assembly 31, and will not be repeated here.

[0072] like Figure 2 and Figure 4As shown, the ignition divider 12 is provided with an outer ring mixing chamber 121 and an inner ring mixing chamber 122. The outer ring fire hole 123 and the inner ring fire hole 124 are both provided on the ignition divider 12. The outer ring mixing channel 111 is connected to the outer ring mixing chamber 121, and the outer ring mixing chamber 121 is connected to the outside of the ignition divider 12 through the outer ring fire hole 123. In other words, the outer ring mixing channel 111 on the burner body 11 and the outer ring mixing chamber 121 on the ignition divider 12 together constitute the outer ring airflow channel of the support assembly. The inner ring mixing channel 112 is connected to the inner ring mixing chamber 122, and the inner ring mixing chamber 122 is further connected to the outside of the ignition divider 12 through the inner ring fire hole 124. In other words, the inner ring mixing channel 112 on the burner body 11 and the inner ring mixing chamber 122 on the ignition divider 12 together constitute the inner ring airflow channel of the support assembly. The outlet of the air buffer channel 113 is connected to the outer ring mixing chamber 121 and the inner ring mixing chamber 122, respectively. That is to say, the secondary air supplied by the fan assembly 20 can enter the outer ring mixing chamber 121 and the inner ring mixing chamber 122 respectively after passing through the air buffer channel 113, and then be mixed with the primary mixed gas for the second time, and the secondary mixed gas is then discharged from the outer ring fire hole 123 and the inner ring fire hole 124 respectively.

[0073] like Figure 3 and Figure 5 As shown, the outer ring mixing channel 111 includes an outer ring ejector pipe 1111 and an outer ring primary mixing chamber 1112. The inlet of the outer ring ejector pipe 1111 is the inlet of the outer ring mixing channel 111 and is connected to the outer ring damper assembly 31, thereby being able to communicate with the outer ring nozzle and the external air respectively. The outer ring primary mixing chamber 1112 is roughly annular, as shown in FIG. Figure 6 As shown, the outer ring primary mixing chamber 1112 is connected to the outer ring mixing chamber 121 of the ignition distributor 12, so that the fuel gas that has been mixed once enters the outer ring mixing chamber 121 and is mixed with the secondary air for a second time. Preferably, the cross-sectional area of ​​the outer ring primary mixing chamber 1112 gradually decreases along the flow direction of the airflow. Because the speed of the airflow will gradually decrease as the airflow flows in the outer ring mixing channel 111, the cross-sectional area of ​​the outer ring primary mixing chamber 1112 is set to gradually decrease, so that the flow rate of the airflow can be matched with the cross-sectional area, so that the mixed gas can swirl in the outer ring primary mixing chamber 1112, so that the fuel gas and the primary air are fully mixed, and the mixed gas can be evenly distributed in the outer ring mixing channel 111. In this embodiment, as Figure 2 、 Figure 4 and Figure 6 As shown, the outer ring mixing channel 111 includes an outer ring air outlet 1113, and the outer ring mixing chamber 121 has an outer ring air inlet 125. When the ignition distributor 12 is covered on the burner body 11, the outer ring air outlet 1113 is located below the outer ring air inlet 125 and is arranged opposite to the outer ring air inlet 125.

[0074] like Figure 3and Figure 5 As shown, the inner ring mixing channel 112 includes an inner ring ejector tube 1121 and an inner ring primary mixing chamber 1122, the inlet of the inner ring ejector tube 1121 is the inlet of the inner ring mixing channel 112, and is connected to the inner ring damper assembly 32, and can be connected to the inner ring nozzle and the external air respectively. The inner ring primary mixing chamber 1122 is roughly annular, as shown in FIG. Figure 6 As shown, the inner ring primary mixing chamber 1122 is connected to the inner ring mixing chamber 122 of the ignition distributor 12, so that the fuel gas that has undergone the primary mixing enters the inner ring mixing chamber 122 for secondary mixing with the secondary air. Preferably, the cross-sectional area of ​​the inner ring primary mixing chamber 1122 gradually decreases along the flow direction of the airflow. Because the speed of the airflow will gradually decrease as the airflow flows in the inner ring mixing channel 112, setting the cross-sectional area of ​​the inner ring primary mixing chamber 1122 to gradually decrease can match the speed of the airflow with the cross-sectional area, so that the mixed gas swirls and flows in the inner ring primary mixing chamber 1122, so that the fuel gas and the primary air are fully mixed, and the once mixed gas is evenly distributed in the inner ring mixing channel 112. In this embodiment, as shown in Figures 2 and 3, Figure 4 and Figure 6 As shown, the inner ring mixing channel 112 includes an inner ring air outlet 1123, and the inner ring mixing chamber 122 has an inner ring air inlet 126. When the ignition distributor 12 is covered on the burner body 11, the inner ring air outlet 1123 is located below the inner ring air inlet 126 and is arranged opposite to the inner ring air inlet 126.

[0075] like Figure 3 and Figure 5 As shown, the air buffer channel 113 includes an air inlet pipe 1131 and an air buffer chamber 1132 that are connected to each other. The inlet of the air inlet pipe 1131 is the inlet of the air buffer channel 113 and is connected to the fan assembly 20, so that the fan assembly 20 can blow air into the air buffer channel 113. Figure 6 As shown, the air buffer chamber 1132 is connected to the outer ring mixing chamber 121 and the inner ring mixing chamber 122 respectively, so that the secondary air can enter the outer ring mixing chamber 121 and the inner ring mixing chamber 122 respectively, and then be mixed with the fuel gas after the primary mixing for the second time. Preferably, the cross-sectional area of ​​the air buffer chamber 1132 gradually decreases along the flow direction of the airflow. Because as the air flows in the air buffer channel 113, the gas flow rate gradually decreases, by setting the cross-sectional area of ​​the air buffer chamber 1132 to gradually decrease, the airflow rate is matched with the cross-sectional area, thereby ensuring that the air swirls and flows in the air buffer chamber 1132, thereby playing a role in stabilizing the airflow and ensuring that the air is evenly distributed in the air buffer channel 113. In this embodiment, as Figure 2 、 Figure 4 and Figure 6As shown, the air buffer passage 113 includes an inner-ring air outlet 1134 and an outer-ring air outlet 1133. When the baffle 151 is in the open position (i.e., Figure 6 the state shown), the outer-ring air outlet 1133 is located below the outer-ring air inlet 125 and is in communication with the outer-ring air inlet 125. The inner-ring air outlet 1134 is located below the inner-ring air inlet 126 and is in communication with the inner-ring air inlet 126. When the baffle 151 is in the open position (not shown), the baffle 151 blocks between the outer-ring air outlet 1133 and the outer-ring air inlet 125, so that the air buffer passage 113 is not in communication with the outer-ring mixing chamber 121. Similarly, the baffle 151 blocks between the inner-ring air outlet 1134 and the inner-ring air inlet 126, so that the air buffer passage 113 is not in communication with the inner-ring mixing chamber 122. In this state, even if the fan assembly 20 is damaged and no longer blows air, the gas in the outer-ring mixing chamber 121 and the inner-ring mixing chamber 122 will not flow back into the air buffer passage 113, thereby avoiding gas leakage and avoiding air flow disturbance at the flame holes.

[0076] As Figure 2 , Figure 7 and Figure 8 shown, the baffle 151 is arranged between the burner head main body 11 and the burner 12, and the driving assembly 152 can drive the baffle 151 to rotate. As Figure 7 shown, when the baffle 151 rotates to the open position, the baffle 151 avoids the outer-ring air outlet 1133 and the inner-ring air outlet 1134. When the baffle 151 rotates to the blocking position, the baffle 151 blocks the outer-ring air outlet 1133 and the inner-ring air outlet 1134.

[0077] As Figure 2 and Figure 4As shown, at least two outer ring air outlets 1113 are provided, and at least two outer ring air outlets 1113 are spaced apart along the circumference of the burner body 11. The number and position of the outer ring air outlets 1133 correspond to the number and position of the outer ring air outlets 1113, and the number and position of the outer ring air inlets 125 correspond to the number and position of the outer ring air outlets 1113. Therefore, each outer ring air outlet 1113 and the corresponding outer ring air outlet 1133 are connected to the outer ring mixing chamber 121 through an outer ring air inlet 125. This ensures that the primary mixed gas in the outer ring mixing channel 111 and the air in the air buffer channel 113 can all enter the outer ring mixing chamber 121 uniformly along the circumference for secondary mixing, thereby improving the uniformity of the secondary mixing. In this embodiment, the outer ring air outlet 1113, the outer ring air outlet 1133, and the outer ring air inlet 125 are all arranged in an arc shape. Optionally, the number of the outer ring air outlet 1113, the outer ring air outlet 1133 and the outer ring air inlet 125 are all four, and are evenly distributed along the circumference of the burner head body 11. In other embodiments, the number of the outer ring air outlet 1113, the outer ring air outlet 1133 and the outer ring air inlet 125 can also be set to three, five or more, which is not limited here.

[0078] like Figure 2 and Figure 4 As shown, at least two inner ring air outlets 1123 are provided, spaced apart along the circumference of the burner body 11. The number and position of the inner ring air outlets 1134 correspond to the number and position of the inner ring air outlets 1123, and the number and position of the inner ring air inlets 126 correspond to the number and position of the inner ring air outlets 1123. Each inner ring air outlet 1123 and the corresponding inner ring air outlet 1134 are connected to the inner ring mixing chamber 122 via an inner ring air inlet 126. This ensures that the primary mixed gas in the inner ring mixing channel 112 and the air in the air buffer channel 113 can all enter the inner ring mixing chamber 122 uniformly along the circumference for secondary mixing, thereby improving the uniformity of the secondary mixing. In this embodiment, the inner ring air outlets 1123, the inner ring air outlets 1134, and the inner ring air inlet 126 are all arranged in an arc shape. Optionally, the number of inner ring air outlet 1123, inner ring air outlet 1134 and inner ring air inlet 126 is two, and they are evenly distributed along the circumference of the burner head body 11. In other embodiments, the number of inner ring air outlet 1123, inner ring air outlet 1134 and inner ring air inlet 126 can also be set to three, four or more, which is not limited here.

[0079] like Figure 6 and Figure 7As shown, the baffle 151 is provided with an outer ring avoidance opening 1511 and an inner ring avoidance opening 1512. When the baffle 151 is in the open position, the outer ring air outlet 1133, the outer ring avoidance opening 1511, and the outer ring air inlet 125 are arranged relative to each other in the upper and lower directions. At the same time, the inner ring air outlet 1134, the inner ring avoidance opening 1512, and the inner ring air inlet 126 are arranged relative to each other in the upper and lower directions, so that the air buffer channel 113 is connected to the outer ring mixing chamber 121 and the inner ring mixing chamber 122 at the same time. In this embodiment, the number of the outer ring avoidance openings 1511 is the same as the number of the outer ring air outlets 1133, and the positions are arranged in a one-to-one correspondence. The shape of the outer ring avoidance opening 1511 is also arc-shaped, and the size of the outer ring avoidance opening 1511 is larger than the size of the outer ring air outlet 1133, thereby avoiding the situation where the baffle 151 partially blocks the outer ring air outlet 1133. The number of inner ring avoidance openings 1512 is the same as the number of inner ring air outlets 1134, and their positions are arranged in a one-to-one correspondence. The inner ring avoidance openings 1512 are also arc-shaped and larger than the inner ring air outlets 1134, thereby preventing the baffle 151 from partially blocking the inner ring air outlets 1134.

[0080] like Figure 6 and Figure 7 As shown, in this embodiment, the baffle 151 is circular in configuration, and its diameter is smaller than the diameter of the circle formed by the outer ring gas outlets 1113. Therefore, no matter how the baffle 151 rotates, it will not block the outer ring gas outlet 1113, thereby ensuring that the outer ring gas outlet 1113 is always connected to the outer ring gas inlet 125. The baffle 151 is provided with an inner ring gas avoidance port 1513, which is used to avoid the inner ring gas outlet 1123. The inner ring gas avoidance port 1513 is larger than the inner ring gas outlet 1123 and ensures that the inner ring gas outlet 1123 always maintains communication with the inner ring gas inlet 126 during the rotation of the baffle 151 between the open position and the blocked position. In this embodiment, the number of inner ring gas avoidance ports 1513 is equal to the number of inner ring gas outlets 1123 . In other embodiments, one inner ring gas avoidance port 1513 may be provided, and the one inner ring gas avoidance port 1513 may avoid two inner ring gas outlets 1123 .

[0081] like Figure 2 、 Figure 7 and Figure 8As shown, the burner body 11 is provided with a through hole 114 extending in the up-down direction, and the backflow prevention mechanism 15 also includes a transmission member 153. The drive assembly 152 is located outside the through hole 114. One end of the transmission member 153 is connected to the output end of the drive assembly 152, and the other end passes through the through hole 114 and is connected to the baffle 151. The drive assembly 152 rotates by driving the transmission member 153, thereby driving the baffle 151 to rotate. By providing the transmission member 153, the drive assembly 152 can be set at a position far away from the high-temperature area, thereby preventing the drive assembly 152 from overheating and failing to work properly. Optionally, the drive assembly 152 can be a direct drive motor, a stepper motor, etc., which is not specifically limited here. The transmission member 153 is a rod. Optionally, the transmission member 153 can be made of a material with good strength and poor thermal conductivity. The transmission member 153 can also be made of a metal material coated with a heat insulation layer.

[0082] like Figure 8 As shown, the concentration detection assembly 14 can be a gas concentration sensor. The gas concentration sensor comprises a main body and a detection end. The main body is located outside the air buffer channel 113, facilitating connection with signal lines and other components. The detection end extends into the air buffer channel 113, enabling accurate detection of the gas concentration within the air buffer channel 113. This gas concentration sensor is conventional technology, and its detailed structure and operating principle are not detailed here.

[0083] Preferably, if Figure 1 As shown, the burner head 10 further includes a check valve 13 installed at the inlet of the air buffer channel 113. The check valve 13 is configured to allow only one-way airflow into the air buffer channel 113. Therefore, if the blower assembly 20 is damaged, the check valve 13 can prevent gas from flowing out of the inlet of the air buffer channel 113, thereby improving the burner's reliability in preventing gas leakage. It is understood that the check valve 13 can be any conventional method without violating the inventive concept of this application, and is not specifically limited herein.

[0084] In one embodiment, Figure 2 、 Figure 5 and Figure 6As shown, the air buffer channel 113 is a single chamber, and the cross-sectional area of ​​the outer ring air outlet 1133 is larger than the cross-sectional area of ​​the inner ring air outlet 1134. Typically, the volume and load of the outer ring mixing chamber 121 are both larger than those of the inner ring mixing chamber 122. Therefore, by setting the cross-sectional area of ​​the outer ring air outlet 1133 to be larger than that of the inner ring air outlet 1134, it is possible to ensure that the total amount of secondary air entering the outer ring mixing chamber 121 is greater than the total amount of secondary air entering the inner ring mixing chamber 122. This optimizes the distribution of secondary air, ensuring that the amount of secondary air replenished matches the amount of gas in the corresponding mixing chamber, thereby improving combustion efficiency. Preferably, the ratio of the cross-sectional area of ​​the outer ring air outlet 1133 to the cross-sectional area of ​​the inner ring air outlet 1134 is 1.1 to 8:1. Within this range, it is possible to ensure that an appropriate amount of secondary air can enter both the outer ring mixing chamber 121 and the inner ring mixing chamber 122, thereby improving combustion efficiency. Optionally, the ratio of the cross-sectional area of ​​the outer ring air outlet 1133 to the cross-sectional area of ​​the inner ring air outlet 1134 may be 1.1:1, 3.5:1, 6:1, 8:1, etc.

[0085] It should be noted that, for the scheme having multiple outer ring air outlets 1133 and multiple inner ring air outlets 1134, the ratio of the cross-sectional areas of the outer ring air outlets 1133 to the inner ring air outlets 1134 represents the ratio of the total cross-sectional areas of the multiple outer ring air outlets 1133 to the total cross-sectional areas of the multiple inner ring air outlets 1134.

[0086] In one embodiment, Figure 9 and Figure 10 As shown, the air buffer channel 113 includes an outer ring air branch 1135 and an inner ring air branch 1136. The fan assembly 20 includes an outer ring fan 21 and an inner ring fan 22. The outer ring fan 21 is connected to the inlet of the outer ring air branch 1135 and can blow air into the outer ring air branch 1135. The outlet of the outer ring air branch 1135 is connected to the outer ring mixing chamber 121. The inner ring fan 22 is connected to the inlet of the inner ring air branch 1136 and can blow air into the inner ring air branch 1136. The outlet of the inner ring air branch 1136 is connected to the inner ring mixing chamber 122. That is, in this embodiment, through the cooperation of the outer ring air branch 1135 and the outer ring fan 21, and the inner ring air branch 1136 and the inner ring fan 22, the total amount of secondary air respectively added to the outer ring mixing chamber 121 and the inner ring mixing chamber 122 can be more accurately controlled, and the amount of secondary air respectively added to the outer ring mixing chamber 121 and the inner ring mixing chamber 122 does not interfere with each other, thereby making the combustion condition of the burner better.

[0087] Preferably, if Figure 11As shown, the burner also includes a controller 50 and a gas flow sensor 40. The controller 50 is configured as a device comprising both software and hardware. The gas flow sensor 40, the fan assembly 20, the drive assembly 152, and the concentration detection assembly 14 are all electrically connected to the controller 50. The gas flow sensor 40 is capable of detecting the flow rate information of the outer and inner ring nozzles injecting combustion into the outer and inner ring mixing channels 111 and 112, respectively. Based on the detection results of the gas flow sensor 40, the controller 50 controls whether the fan assembly 20 starts operating and the output air speed of the fan assembly 20. It should be noted that in this embodiment, the outer and inner ring nozzles are configured to be linked, meaning that they are both opened and closed simultaneously. The concentration detection assembly 14 transmits the detected gas concentration information to the controller 50. Based on the concentration results, the controller 50 sends instructions to the drive assembly 152, which in turn drives the baffle 151 between an open position and a blocked position.

[0088] like Figure 12 As shown, this embodiment also provides a burner control method, which is applied to the above-mentioned burner. Specifically, the burner control method includes:

[0089] Step 10: Obtaining gas flow information entering the outer ring airflow channel and the inner ring airflow channel;

[0090] Step 20, judging whether the conditions for starting the fan assembly 20 are met based on the gas flow information in step 10;

[0091] Step 30: If yes, turn on the fan assembly 20 and output a corresponding blast speed according to the amount of gas sprayed by the outer ring nozzle and the inner ring nozzle; if no, keep the fan assembly 20 closed;

[0092] Step 40, determining whether the gas concentration in the air buffer channel 113 is zero;

[0093] Step 50: If yes, obtain the gas flow information entering the outer ring airflow channel and the inner ring airflow channel; if no, the driving component 152 drives the baffle 151 to move from the open position to the blocked position and issues a prompt;

[0094] Step 60, judging whether the conditions for shutting down the fan assembly 20 are met based on the gas flow information obtained in step 50;

[0095] Step 70: If yes, turn off the fan assembly 20; if not, return to step 40.

[0096] The control method of the burner of this embodiment is that when it is judged that the gas flow information in the outer ring air flow channel and the inner ring air flow channel reaches the condition for starting the fan assembly 20, it is considered that the burner starts combustion. At this time, the fan assembly 20 is made to supplement the secondary air at a blast speed that matches the gas flow, so as to ensure that the gas and air are fully and evenly mixed, thereby ensuring that the burner has high combustion efficiency for the gas, generates less exhaust gas and has a stable combustion flame. When it is detected that there is gas in the air buffer channel 113 (that is, the gas concentration is not zero), it indicates that the fan has failed or the gas has backflowed. At this time, the drive assembly 152 drives the baffle 151 to move to the blocking position, thereby avoiding continuous gas backflow disturbance and gas leakage. At the same time, the burner sends a prompt message to facilitate the user to check and process or stop using the burner in time. When the gas concentration in the air buffer channel 113 is detected to be zero, the burner operates normally. Optionally, the prompt message can be an alarm sound, a flashing indicator, etc. Then, when it is determined that the gas flow information in the outer ring airflow channel and the inner ring airflow channel reaches the condition for closing the fan assembly 20, it is determined that the burner has stopped or is about to stop burning, and at this time, the fan assembly 20 can be stopped from blowing air.

[0097] In steps 10 and 50 of this embodiment, the gas flow within the outer and inner ring airflow channels is ejected via the outer and inner ring nozzles, respectively. The corresponding gas flow information can be detected by gas flow sensor 40. In other embodiments, other components can also be used to detect the gas flow within the outer and inner ring airflow channels, and this is not specifically limited here. In step 40, the determination of whether the gas concentration within air buffer channel 113 is zero is performed jointly by concentration detection assembly 14 and controller 50.

[0098] Preferably, in step 20, the condition for turning on the fan assembly 20 is determined as follows: the time for the gas flow rate to change from zero to greater than zero is greater than a first preset time, and the first preset time is 5 to 30 seconds. By starting to supply secondary air after the first preset time after the start of gas supply, the proportion of gas in the mixed gas reaching the outer ring fire hole 123 and the inner ring fire hole 124 within the first preset time is higher, and the gas flow is more stable, thereby facilitating ignition and allowing the outer ring fire hole 123 and the inner ring fire hole 124 to quickly reach a state of stable combustion, avoiding the situation where ignition is difficult and the flame is extinguished. After the first preset time, the secondary air added by the fan assembly 20 can ensure that the gas is fully burned subsequently. Optionally, the first preset time can be set to 5s, 10s, 15s, 20s, 25s, or 30s.

[0099] Preferably, in step 60, the condition for shutting down the fan assembly 20 is determined to be met if the time it takes for the gas flow rate to change from greater than zero to equal zero is greater than a second preset time, which is 5 to 30 seconds. That is, during the second preset time after the gas supply is stopped, the fan assembly 20 continues to replenish secondary air. On the one hand, if the user mistakenly closes the outer and inner ring nozzles briefly and then immediately reopens them, the fan assembly 20 shutdown condition will not be determined to have been met, and the closing and reopening operation will not occur, thereby ensuring a continuous supply of secondary air. On the other hand, if the user does indeed close the outer and inner ring nozzles, the secondary air can exhaust and burn the gas in the outer and inner ring airflow channels within the second preset time of delayed fan shutdown, reducing gas stagnation in the burner head 10 and improving safety. Optionally, the second preset time can be set to 5 seconds, 10 seconds, 15 seconds, 20 seconds, 25 seconds, or 30 seconds.

[0100] Preferably, in step 70, if the fan assembly 20 is determined to have reached the shutdown condition, the fan assembly 20 is shut down after a third preset time period, which is 1-10 seconds. This arrangement further increases the time for delaying the fan assembly 20 from shutting down, thereby reducing gas retention in the burner 10 and improving safety. Optionally, the third preset time period can be set to 1 second, 3 seconds, 5 seconds, 7 seconds, or 10 seconds.

[0101] Obviously, the above embodiments of the present invention are merely examples for the purpose of illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will readily vary the specific embodiments and scope of application based on the principles of the present invention, and this specification should not be construed as limiting the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the claims.

Claims

1. A burner head, characterized in that: include: A support assembly is provided with an outer ring airflow channel, an inner ring airflow channel and an air buffer channel (113), the outer ring airflow channel and the inner ring airflow channel are both configured to mix gas and air, and are respectively connected to the outside of the support assembly through the outer ring fire hole (123) and the inner ring fire hole (124), and the inlet of the air buffer channel (113) is configured to communicate with the fan assembly (20); a concentration detection component (14) for detecting the gas concentration in the air buffer channel (113); A backflow prevention mechanism (15) comprising a baffle (151) and a drive assembly (152); The driving component (152) can drive the baffle (151) to move between an open position and a closed position according to the detection result of the concentration detection component (14). In the open position, the outlet of the air buffer channel (113) is connected to the outer ring air flow channel and the inner ring air flow channel respectively. In the closed position, the outlet of the air buffer channel (113) is disconnected from the outer ring air flow channel and the inner ring air flow channel respectively.

2. The burner according to claim 1, wherein: The burner head further comprises a check valve (13), which is arranged at the inlet of the air buffer channel (113) and is configured to only allow airflow to flow into the air buffer channel (113) in one direction.

3. The burner according to claim 1, wherein: The air buffer channel (113) includes an outer ring air branch channel (1135) and an inner ring air branch channel (1136), wherein the inlet of the outer ring air branch channel (1135) is configured to communicate with the outer ring fan (21), and the outlet of the outer ring air branch channel (1135) is configured to communicate with the outer ring air flow channel; The inlet of the inner ring air branch duct (1136) is configured to communicate with the inner ring fan (22), and the outlet of the inner ring air branch duct (1136) is used to communicate with the inner ring air flow channel.

4. The burner head according to any one of claims 1 to 3, characterized in that: The support assembly comprises: The burner body (11) is provided with an outer ring mixing channel (111), an inner ring mixing channel (112) and the air buffer channel (113), wherein the outer ring mixing channel (111) and the inner ring mixing channel (112) are both configured for primary mixing of gas and air; The ignition divider (12) is covered on the burner body (11), and an outer ring mixing chamber (121) and an inner ring mixing chamber (122) are provided on the ignition divider (12). The outer ring fire hole (123) and the inner ring fire hole (124) are both arranged on the ignition divider (12). The outer ring mixing chamber (121) is communicated with the outer ring mixing channel (111) and the outer ring fire hole (123) respectively, and the inner ring mixing chamber (122) is communicated with the inner ring mixing channel (112) and the inner ring fire hole (124) respectively.

5. The burner according to claim 4, characterized in that The air buffer channel (113) comprises an outer ring air outlet (1133) and an inner ring air outlet (1134), wherein the outer ring air outlet (1133) is used to communicate with the outer ring mixing chamber (121), and the inner ring air outlet (1134) is used to communicate with the inner ring mixing chamber (122); The baffle (151) is arranged between the burner body (11) and the ignition distributor (12), and the driving component (152) can drive the baffle (151) to rotate to block the outer ring air outlet (1133) and the inner ring air outlet (1134), or avoid the outer ring air outlet (1133) and the inner ring air outlet (1134).

6. The burner according to claim 5, wherein: The baffle (151) is provided with an outer ring avoidance opening (1511) and an inner ring avoidance opening (1512); when the outer ring avoidance opening (1511) is opposite to the outer ring air outlet (1133), the inner ring avoidance opening (1512) is opposite to the inner ring air outlet (1134).

7. The burner according to claim 5, wherein: The burner body (11) is provided with a through hole (114) extending in the up-down direction. The backflow prevention mechanism (15) further comprises a transmission member (153). One end of the transmission member (153) is connected to the output end of the drive assembly (152), and the other end passes through the through hole (114) and is connected to the baffle (151).

8. The burner according to claim 5, wherein: The ratio of the cross-sectional area of ​​the outer ring air outlet (1133) to the cross-sectional area of ​​the inner ring air outlet (1134) is 1.1 to 8:

1.

9. The burner according to claim 5, wherein: The outer ring mixing channel (111) has at least two outer ring air outlets (1113), the outer ring mixing chamber (121) has a corresponding number of outer ring air inlets (125), the air buffer channel (113) has a corresponding number of outer ring air outlets (1133), and the outer ring air outlets (1113), the outer ring air inlets (125) and the outer ring air outlets (1133) are arranged in a one-to-one correspondence; and / or The inner ring mixing channel (112) has at least two inner ring air outlets (1123), the inner ring mixing chamber (122) has a corresponding number of inner ring air inlets (126), and the air buffer channel (113) has a corresponding number of inner ring air outlets (1134). The inner ring air outlets (1123), the inner ring air inlets (126) and the inner ring air outlets (1134) are arranged in a one-to-one correspondence.

10. The burner according to claim 4, wherein: The outer ring mixing channel (111) comprises an outer ring ejector pipe (1111) and an outer ring primary mixing chamber (1112) which are connected to each other, the inlet of the outer ring ejector pipe (1111) is configured to be connected to the outer ring nozzle and the external air respectively, the outer ring primary mixing chamber (1112) is connected to the outer ring mixing chamber (121), and the cross-sectional area of ​​the outer ring primary mixing chamber (1112) gradually decreases along the flow direction of the airflow; and / or The inner ring mixing channel (112) comprises an inner ring ejector tube (1121) and an inner ring primary mixing chamber (1122) which are connected to each other, the inlet of the inner ring ejector tube (1121) is configured to be connected to the inner ring nozzle and the external air respectively, the inner ring primary mixing chamber (1122) is connected to the inner ring mixing chamber (122), and the cross-sectional area of ​​the inner ring primary mixing chamber (1122) gradually decreases along the flow direction of the airflow; and / or The air buffer channel (113) comprises an air intake pipe (1131) and an air buffer chamber (1132) which are connected to each other. The inlet of the air intake pipe (1131) is configured to be connected to the fan assembly (20). The air buffer chamber (1132) is connected to the outer ring mixing chamber (121) and the inner ring mixing chamber (122) respectively. The cross-sectional area of ​​the air buffer chamber (1132) gradually decreases along the direction of air flow.

11. A burner, characterized in that: It comprises a blower assembly (20), an inner ring nozzle, an outer ring nozzle and a burner according to any one of claims 1 to 10, wherein the blower assembly (20) is used to blow air into the air buffer channel (113), the inner ring nozzle is used to spray gas into the inner ring airflow channel, and the outer ring nozzle is used to spray gas into the outer ring airflow channel.

12. A burner control method, characterized in that: Applied to the burner according to claim 11, the burner control method includes: Step 10: Acquire gas flow information entering the outer ring airflow channel and the inner ring airflow channel; Step 20, judging whether the conditions for starting the fan assembly (20) are met based on the gas flow information in step 10; Step 30, if yes, then turn on the fan assembly (20), and output a corresponding blast speed according to the amount of gas sprayed by the outer ring nozzle and the inner ring nozzle; if no, then keep the fan assembly (20) turned off; Step 40, determining whether the gas concentration in the air buffer channel (113) is zero; Step 50: If yes, obtain the gas flow information entering the outer ring airflow channel and the inner ring airflow channel; if no, the driving component (152) drives the baffle (151) to move from the open position to the blocked position and issues a prompt; Step 60, judging whether the conditions for shutting down the fan assembly (20) are met based on the gas flow information obtained in step 50; Step 70, if yes, then turn off the fan assembly (20), if not, then return to step 40.

13. The burner control method according to claim 12, wherein: In step 20, whether the condition for starting the fan assembly (20) is met is determined as follows: the time for the gas flow rate to change from zero to greater than zero is greater than a first preset time, and the first preset time is 5 to 30 seconds.

14. The burner control method according to claim 12, wherein: In step 60, whether the condition for shutting down the fan assembly (20) is met is determined as follows: the time for the gas flow rate to change from greater than zero to equal to zero is greater than a second preset time, and the second preset time is 5 to 30 seconds.

15. The burner control method according to claim 12, wherein: In step 70, if yes, the fan assembly (20) is turned off after a third preset time, and the third preset time is 1-10 seconds.

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