Burners and stoves

Abstract

This application discloses a burner and a cooktop, belonging to the technical field of gas stoves. The burner includes a main body and a fan assembly. The main body has a gas blowing channel, at least one flue gas recirculation channel, and multiple flame outlets. The gas blowing channel has a first inlet and a first outlet. The flue gas recirculation channel has a flue gas recirculation port and a flue gas outlet. The first inlet is connected to the flue gas outlet, and the first outlet is connected to at least some of the flame outlets. The first outlet, the flue gas recirculation port, and the flame outlets are all upward-facing. At least a portion of the fan assembly is disposed within the main body. The fan assembly is used to form an airflow from the first inlet to the flame outlets within the gas blowing channel. This embodiment can extend the residence time of the flue gas generated by the burner, thereby improving the heat exchange effect between the flue gas and the bottom of the cookware, and thus improving thermal efficiency.

Description

Technical Field

[0001] This application relates to the field of gas stove technology, and in particular to a burner and stove. Background Technology

[0002] A stove is a common kitchen appliance in daily life. A stove usually consists of a pot rack and a burner. The pot rack is located around the burner and is used to support the pot. The burner is used to heat the pot.

[0003] However, in related technologies, the high-temperature flue gas generated when the burner is working will flow out quickly from the gap between the pot rack and the pot. The residence time of the high-temperature flue gas is short, which makes the heat exchange effect between the flue gas and the bottom of the pot poor, resulting in low thermal efficiency. Summary of the Invention

[0004] This application provides a burner and a stove that can extend the residence time of the flue gas generated by the burner, thereby improving the heat exchange effect with the bottom of the pot and thus improving thermal efficiency.

[0005] In a first aspect, embodiments of this application provide a burner, including:

[0006] The main body comprises a blower channel, at least one flue gas recirculation channel, and multiple flame outlets. The blower channel has a first inlet and a first outlet. The flue gas recirculation channel has a flue gas recirculation port and a flue gas outlet. The first inlet is connected to the flue gas outlet, and the first outlet is connected to at least a portion of the flame outlets. The first outlet, the flue gas recirculation port, and the flame outlets are all upward-facing.

[0007] A fan assembly, at least a portion of which is disposed within the main body, the fan assembly being used to form an airflow flowing from the first inlet to the flame outlet within the air blowing channel.

[0008] In some embodiments of this application, the subject includes:

[0009] A support having a receiving cavity, and an air intake channel communicating with the fire outlet is provided on the support;

[0010] The flame distributor is at least partially installed in the receiving cavity, the flame distributor has the gas blowing channel and a plurality of the flame outlet holes, and the flue gas outlet is connected to the first inlet through the receiving cavity.

[0011] In some embodiments of this application, the outer peripheral sidewall of the flame distributor and the inner peripheral sidewall of the support are spaced apart to form a flue gas return channel.

[0012] In some embodiments of this application, the fire distributor includes:

[0013] An inner flame cap is connected to the support, and the air passage is located within the inner flame cap;

[0014] An outer flame cap is connected to the support, and the outer flame cap is arranged around the periphery of the inner flame cap;

[0015] The plurality of flame outlets include a plurality of inner flame outlets and a plurality of outer flame outlets. The plurality of inner flame outlets are disposed on the inner flame cover and arranged around the outer periphery of the air blowing channel. The first outlet is connected to the inner flame outlets. The plurality of outer flame outlets are disposed on the outer flame cover and arranged circumferentially on the outer flame cover at intervals.

[0016] In some embodiments of this application, the inner flame cover has a first chamber arranged around the periphery of the air intake channel, the air intake channel is connected to the inner flame hole through the first chamber, and the first chamber is connected to the first outlet.

[0017] In some embodiments of this application, the outer flame cap and the inner flame cap are spaced apart to form a flue gas recirculation channel between the outer flame cap and the inner flame cap.

[0018] In some embodiments of this application, the support is provided with an air supply port that communicates with the receiving cavity. The air supply port is connected to the first inlet and is used to allow external gas to flow into the first inlet.

[0019] In some embodiments of this application, the support further has a through hole; the fan assembly includes:

[0020] Fan blades are disposed within the air blowing channel;

[0021] A drive unit is disposed outside the air blowing channel. The drive shaft of the drive unit passes through the through hole and is connected to the fan blade to drive the fan blade to rotate and form an airflow from the first inlet to the first outlet in the air blowing channel.

[0022] In some embodiments of this application, the support further has a gas inlet communicating with the air intake channel, and the gas inlet is spaced apart from the through hole.

[0023] In some embodiments of this application, at least a portion of the drive shaft is located within and extends along the air intake channel, and the drive member is located outside the air intake channel.

[0024] In some embodiments of this application, the flame distributor and the bottom wall of the receiving cavity are spaced apart to form a connecting channel. The flame distributor is provided with a baffle structure extending toward the connecting channel. The baffle structure encloses and forms part of the gas blowing channel. The first inlet is provided in the baffle structure and is connected to the flue gas outlet through the connecting channel.

[0025] In some embodiments of this application, a thermal insulation layer is provided in the main body.

[0026] Secondly, embodiments of this application also provide a stove, including a pot rack and a burner as described in any of the above embodiments, wherein the pot rack is arranged around the outer periphery of the burner.

[0027] In some embodiments of this application, the stove further includes a support plate, the burner is disposed on the support plate, and the support plate is provided with an annular stepped structure;

[0028] The pot support includes an annular component and multiple pot supports. The annular component is arranged around the outer periphery of the burner and is disposed on the stepped structure. The multiple pot supports are arranged at intervals on the annular component.

[0029] Based on the burner and stove in this embodiment, this embodiment uses a flue gas circulation loop and a fan assembly in the main body to drive airflow through the flame outlet to the bottom of the pot, enhancing the flue gas disturbance at the bottom of the pot. Then, the airflow is blocked by the bottom of the pot and diffuses outwards along the bottom of the pot, thereby guiding the high-temperature flue gas at the top of the burner. This pushes some of the high-temperature flue gas into the flue gas return channel through the flue gas return port, and then re-enters the blower channel through the flue gas outlet from the first inlet, forming a circulation flow. During this process, when the flue gas enters the flame outlet, the high-temperature flue gas can transfer some heat to the mixture of gas and primary air, thereby raising the temperature of the mixture. In addition, some flue gas is repeatedly guided to the bottom of the pot, thereby prolonging the residence time of the high-temperature flue gas, increasing the contact heat exchange between the high-temperature flue gas and the bottom of the pot, effectively reducing the exhaust temperature, reducing the heat loss of the high-temperature flue gas, and more fully improving the heat exchange efficiency between the flue gas and the bottom of the pot, as well as improving the overall thermal energy utilization efficiency of the burner. Meanwhile, due to the circulation of some flue gas, the unburned combustible components in the flue gas can participate in combustion again during the circulation process, reducing heat loss caused by incomplete combustion and reducing nitrogen oxide emissions, further improving combustion efficiency and emission performance. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the burner structure in one embodiment of this application;

[0032] Figure 2 This is a first-view structural schematic diagram of a cross-section of a portion of the burner in one embodiment of this application;

[0033] Figure 3 This is a schematic diagram showing the flow direction of airflow in the burner in one embodiment of this application;

[0034] Figure 4 This is a cross-sectional second-view structural schematic diagram of a portion of the burner in one embodiment of this application;

[0035] Figure 5 This is a schematic diagram of the structure of a wind turbine assembly in one embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the structure of the burner bottom in one embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the stove structure in one embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the stove and cookware in one embodiment of this application.

[0039] Figure label:

[0040] 100. Burner;

[0041] 10. Main body; 11. Gas blowing channel; 111. First inlet; 112. First outlet; 12. Flue gas recirculation channel; 121. Flue gas recirculation port; 122. Flue gas outlet; 123. First recirculation channel; 124. Second recirculation channel; 13. Flame outlet; 131. Inner flame port; 132. Outer flame port; 14. Support; 141. Air intake channel; 142. Air replenishment port; 143. Through hole; 144. Gas inlet; 15. Flame distributor; 151. Inner flame cap; 1511. First chamber; 152. Outer flame cap; 16. Connecting channel; 161. Connecting port; 17. Enclosure structure; 18. Insulation layer;

[0042] 20. Fan assembly; 21. Fan blade; 22. Drive component; 23. Drive shaft;

[0043] 31. Gas passage; 32. Air passage;

[0044] 200. Stoves;

[0045] 40. Pot support; 41. Ring-shaped component; 42. Pot support legs;

[0046] 50. Support plate; 51. Stepped structure;

[0047] 300. Cookware. Detailed Implementation

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, a clear and complete description will be provided below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0049] In related technologies, many stoves are open-type combustion systems with a certain space between the cookware and the burner. In actual use, in addition to heating the cookware, a considerable portion of the heat generated by the burner is lost through the high-temperature flue gas, thereby reducing heat transfer efficiency and resulting in low thermal efficiency.

[0050] Regarding the above situation, firstly, please refer to [link / reference needed]. Figures 1-2 This application proposes a burner 100, including a main body 10 and a fan assembly 20.

[0051] The main body 10 has a gas blowing channel 11, at least one flue gas recirculation channel 12, and multiple flame outlets 13. The gas blowing channel 11 has a first inlet 111 and a first outlet 112. The flue gas recirculation channel 12 has a flue gas recirculation port 121 and a flue gas outlet 122. The first inlet 111 is connected to the flue gas outlet 122, and the first outlet 112 is connected to at least some of the flame outlets 13. The first outlet 112, the flue gas recirculation port 121, and the flame outlets 13 are all upward-facing. The flue gas recirculation port 121 and the flame outlets 13 are all facing the top of the main body 10. Some of the flue gas can flow into the gas blowing channel 11 through the flue gas recirculation channel 12 and finally enter some of the flame outlets 13 from the first outlet 112. Therefore, a mixture of gas containing fuel gas, primary air, and high-temperature flue gas is ejected from the flame outlets 13 and ignited by an ignition device to produce a flame. The number of flame outlet holes 13 can be two, three, four or more, and this application does not impose a specific limit on the number of flame outlet holes 13.

[0052] At least a portion of the blower assembly 20 is disposed within the main body 10, and the blower assembly 20 is used to form an airflow flowing from the first inlet 111 to the flame outlet 13 within the blower passage 11.

[0053] Specifically, the flame burns at the top of the burner 100, and the resulting high-temperature flue gas surrounds the top of the burner 100. Because the fan assembly 20 generates airflow, this airflow is sprayed from the first outlet 112 through the flame outlet 13 to the bottom of the cookware 300, which can enhance the flue gas disturbance at the bottom of the cookware 300 (e.g., ...). Figure 8 As shown in the figure, the high-temperature flue gas at the top of the burner 100 enters the flue gas return channel 12 through the flue gas return port 121, then flows into the first inlet 111 through the flue gas outlet 122, and finally enters the blower channel 11. Under the action of the fan assembly 20, it is sprayed onto the bottom of the pot 300 through the flame outlet 13. In this process, the waste heat of the high-temperature flue gas can be reused, thereby reducing the heat loss of the exhaust and improving the thermal efficiency of the burner 100.

[0054] It should be noted that in related technologies, there is a certain spatial gap between the cookware 300 and the pot support 40. During actual use, the high-temperature flue gas generated by the burner 100 flows rapidly out through the gap between the cookware 300 and the pot support 40. The residence time of the high-temperature flue gas is short, resulting in poor heat exchange between the flue gas and the bottom of the cookware 300, thus leading to low thermal efficiency. However, in this application, as... Figures 2-3 As shown, by setting a flue gas circulation loop and a fan assembly 20 in the main body 10, the airflow is driven to be sprayed onto the bottom of the cookware 300 through the flame outlet 13, enhancing the flue gas disturbance at the bottom of the cookware 300. Then, the airflow is blocked by the bottom of the cookware 300 and diffuses outwards along the bottom of the cookware 300, thereby guiding the high-temperature flue gas at the top of the burner 100. This pushes part of the high-temperature flue gas into the flue gas return channel 12 through the flue gas return port 121, and then re-enters the blower channel 11 through the first inlet 111 via the flue gas outlet 122, forming a... The flue gas circulates in a loop. During this process, when the flue gas enters the burner port 13, the high-temperature flue gas can transfer some of its heat to the mixture of combustion gas and primary air, thereby raising the temperature of the mixture. Some of the flue gas is repeatedly guided to the bottom of the cookware 300, thereby extending the residence time of the high-temperature flue gas, increasing the contact heat exchange between the high-temperature flue gas and the bottom of the cookware 300, effectively reducing the exhaust temperature, reducing the heat loss of the high-temperature flue gas, and more fully improving the heat exchange efficiency between the flue gas and the bottom of the cookware 300, as well as improving the overall thermal energy utilization efficiency of the burner 100.

[0055] Meanwhile, due to the recirculation of some flue gas, unburned combustible components in the flue gas can participate in combustion again during the recirculation process, reducing heat loss caused by incomplete combustion and reducing nitrogen oxide emissions, further improving combustion efficiency and emission performance. In addition, the introduction of the fan assembly 20 not only enhances the controllability of flue gas flow, but also allows for efficient combustion matching under different firepower requirements by adjusting the airflow speed of the fan assembly 20.

[0056] Please see Figures 1-4 In some embodiments of this application, the main body 10 includes a support 14 and a flame distributor 15. The support 14 has a receiving cavity and an air intake channel 141 communicating with the flame outlet 13. At least a portion of the flame distributor 15 is installed in the receiving cavity. The flame distributor 15 has an air blowing channel 11 and a plurality of flame outlets 13. The flue gas outlet 122 is connected to the first inlet 111 through the receiving cavity.

[0057] Specifically, the burner 15 is installed in the receiving cavity of the support 14, which provides a stable support for the installation of the burner 15. The mixture of gas and primary air is delivered to the flame outlet 13 of the burner 15 through the air intake channel 141 and ignited by the ignition device at the flame outlet 13 to produce a flame. The flue gas in the flue gas return channel 12 can re-enter the air blowing channel 11 through the receiving cavity and be sprayed from the flame outlet 13 to the bottom of the cookware 300, thereby realizing the recycling of flue gas.

[0058] In some embodiments, the burner 100 further includes a gas passage 31, an air passage 32, and a mixing chamber. Both the gas passage 31 and the air passage 32 are connected to the mixing chamber. The gas passage 31 is used to introduce gas into the mixing chamber, and the air passage 32 is used to introduce primary air into the mixing chamber. The mixing chamber is connected to the air intake passage 141. After the gas and primary air are mixed in the mixing chamber, a mixed gas is formed. Subsequently, the mixed gas is ejected from the flame outlet 13 through the air intake passage 141.

[0059] Further, please see Figures 3-4 In some embodiments of this application, the flame distributor 15 is spaced apart from the bottom wall of the receiving cavity to form a connecting channel 16. The flame distributor 15 is provided with a baffle structure 17 extending toward the connecting channel 16. The baffle structure 17 encloses and forms a partial air blowing channel 11. A first inlet 111 is provided on the baffle structure 17, and the connecting channel 16 is connected to the air blowing channel 11 through the first inlet 111.

[0060] Specifically, a gap is left between the burner 15 and the bottom wall of the receiving cavity of the support 14, which forms a connecting channel 16. The flue gas outlet 122 of the flue gas return channel 12 is located above the connecting channel 16. After the flue gas is discharged through the flue gas outlet 122, it enters the connecting channel 16 formed by the gap, and then flows into the blowing channel 11 through the first inlet 111 on the enclosure structure 17, realizing the secondary recycling of flue gas. The enclosure structure 17 can reduce the area of ​​the first inlet 111 of the blowing channel 11, thereby making the air intake path of the blowing channel 11 more concentrated, which is conducive to increasing the flow rate of flue gas when it flows into the blowing channel 11.

[0061] In some embodiments, such as Figures 1-4As shown, the connecting channel 16 has multiple connecting ports 161 that communicate with the flue gas outlet 122. The multiple connecting ports 161 are arranged at intervals along the periphery of the blowing channel 11. The flue gas outlet 122 surrounds the periphery of the blowing channel 11. Therefore, the total opening area of ​​the multiple connecting ports 161 is smaller than the opening area of ​​the flue gas outlet 122, thereby causing the flue gas to be locally pressurized when it enters the connecting channel 16 from the flue gas outlet 122, thereby increasing the flow velocity and kinetic energy of the flue gas flowing into the connecting channel 16 and effectively enhancing the flue gas circulation power.

[0062] Furthermore, such as Figures 1-2 As shown, the outer peripheral sidewall of the flame distributor 15 and the inner peripheral sidewall of the support 141 are spaced apart to form a flue gas return channel 12.

[0063] The support 14 and the flame distributor 15 together form a flue gas circulation path. The gap between them provides an independent channel for flue gas recirculation. The airflow generated by the fan assembly 20 is ejected through the flame outlet 13, ensuring that the high-temperature flue gas at the bottom of the cookware 300, under the action of the airflow, can enter the flue gas recirculation channel 12 located on the outer periphery of the flame distributor 15 from the flue gas recirculation port 121, and then re-enter the blower channel 11 through the connecting channel 16 from the first inlet 111, realizing the directional recirculation and recycling of high-temperature flue gas. Specifically, taking the high-temperature flue gas generated by the flame burning at the flame outlet 13 as the first flue gas as an example... Figure 3 The direction indicated by the dashed arrow A is the airflow direction formed by the fan assembly 20, and the direction indicated by the dashed arrow B is the flow direction of the first flue gas. By utilizing the structural cooperation between the support 14 and the burner 15, the flue gas return channel 12 is connected, so that the high-temperature flue gas forms an orderly return path during the combustion process, which helps to reduce the disorderly dispersion of flue gas and thus improve the thermal energy utilization rate of the burner 100.

[0064] Please see Figure 4 In some embodiments of this application, the flame distributor 15 includes an inner flame cover 151 and an outer flame cover 152. The inner flame cover 151 is connected to the support 14, and the gas passage 11 is located on the inner flame cover 151. The outer flame cover 152 is connected to the support 14 and is arranged around the periphery of the inner flame cover 151. The plurality of flame outlets 13 include a plurality of inner flame outlets 131 and a plurality of outer flame outlets 132. The plurality of inner flame outlets 131 are located on the inner flame cover 151 and are arranged around the outer periphery of the gas passage 11. The first outlet 112 communicates with the inner flame outlets 131. The plurality of outer flame outlets 132 are located on the outer flame cover 152 and are spaced apart and arranged circumferentially on the outer flame cover 152.

[0065] It is understood that the multiple inner flame holes 131 on the inner flame cap 151 and the multiple outer flame holes 132 on the outer flame cap 152 can all form annular flames, and the two work together to achieve uniform distribution of firepower, improving combustion stability and thermal efficiency. Both the inner flame cap 151 and the outer flame cap 152 have connecting cavities. The mixed gas transported by the air intake channel 141 is transported to the inner flame holes 131 and the outer flame holes 132 through the connecting cavities in the inner flame cap 151 and the outer flame cap 152, respectively, ensuring uniform distribution of the mixed gas. The number of inner flame holes 131 can be two, three, four, or more; this application does not impose a specific limitation on the number of inner flame holes 131. Similarly, the number of outer flame holes 132 can be two, three, four, or more; this application does not impose a specific limitation on the number of outer flame holes 132.

[0066] Specifically, the airflow ejected from the blower assembly 20 is ejected through the inner flame hole 131. The airflow is blocked by the bottom of the pot 300 and diffuses outwards along the bottom of the pot 300. This guides the high-temperature flue gas at the bottom of the pot 300, pushing the high-temperature flue gas at the bottom of the pot 300 into the flue gas return channel 12 through the flue gas return port 121 between the inner flame cover 151 and the outer flame cover 152. The flue gas then re-enters the blower channel 11 through the connecting channel 16 from the first inlet 111, realizing the directional return and recycling of high-temperature flue gas, effectively improving combustion efficiency and reducing pollutant emissions.

[0067] Furthermore, such as Figure 4 As shown, the outer flame cover 152 and the inner flame cover 151 are spaced apart to form a flue gas return channel 12 between the outer flame cover 152 and the inner flame cover 151.

[0068] It is understood that the flue gas recirculation channel 12 is located on the periphery of the inner burner cap 151, that is, the flame outlet holes 13 on the inner burner cap 151 are all located inside the flue gas recirculation channel 12. The flue gas recirculation channel 12 is formed by the gap between the outer burner cap 152 and the inner burner cap 151. This gap extends from the top of the outer burner cap 152 and the inner burner cap 151 to the bottom and communicates with the connecting channel 16 at the bottom to form a continuous recirculation path. In this embodiment, by designing the structure of the burner 15 in separate parts, the outer burner cap 152 and the inner burner cap 151 are spaced apart to form the flue gas recirculation channel 12. There is no need to set up a separate flue gas recirculation structure, which simplifies the overall assembly process and improves the utilization rate of the internal space of the burner 100.

[0069] Furthermore, the flue gas recirculation channel 12 is an annular structure surrounding the outer circumference of the blower channel 11. The annular structure of the flue gas recirculation channel 12 allows more high-temperature flue gas to recirculate and ensures that the high-temperature flue gas is evenly distributed within the annular channel.

[0070] In some embodiments, such as Figures 3-4As shown, the flue gas recirculation channel 12 formed between the outer peripheral sidewall of the burner 15 and the inner peripheral sidewall of the support 14 is the first recirculation channel 123, and the flue gas recirculation channel 12 formed between the outer burner cap 152 and the inner burner cap 151 is the second recirculation channel 124. The burner 100 can simultaneously provide the first recirculation channel 123 and the second recirculation channel 124. Both the first recirculation channel 123 and the second recirculation channel 124 can be annular structures. They are coaxial and nested to form a double-layer annular flue gas recirculation path. The first recirculation channel 123 and the second recirculation channel 124 are connected through the connecting channel 16 in the support 14, so that the high-temperature flue gas can achieve multi-stage recirculation during the combustion process.

[0071] For example, taking the high-temperature flue gas generated by the flame burning at the outer flame hole 132 as the first flue gas and the high-temperature flue gas generated by the flame burning at the inner flame hole 131 as the second flue gas, Figure 3 The direction indicated by the dashed arrow A is the airflow direction formed by the fan assembly 20, the direction indicated by the dashed arrow B is the flow direction of the first flue gas, and the direction indicated by the dashed arrow C is the flow direction of the second flue gas. The airflow formed by the fan assembly 20 is sprayed out to the bottom of the pot 300 through the inner fire hole 131. Then, the airflow is blocked by the bottom of the pot 300 and spreads outward along the bottom of the pot 300, thereby pushing some of the first flue gas in the surrounding area into the second return channel 124 and pushing some of the first flue gas into the first return channel 123. Subsequently, the flue gas in the first return channel 123 and the second return channel 124 mix and re-enter the blowing channel 11 through the connecting channel 16 from the first inlet 111, forming a circulating flow.

[0072] Furthermore, such as Figure 4 As shown, the inner flame cover 151 has a first chamber 1511 arranged around the air passage 11. The air intake passage 141 is connected to the inner flame hole 131 through the first chamber 1511, and the first chamber 1511 is connected to the first outlet 112.

[0073] Understandably, the first chamber 1511 serves as a gas mixing chamber, used to further promote the mixing of fuel gas, primary air, and flue gas, increasing the temperature of the mixed gas, which is then ejected through the inner flame port 131. The fan assembly 20 generates airflow, which reaches the first chamber 1511 from the first outlet 112, and is then ejected from the first chamber 1511 through the inner flame port 131. The airflow is blocked by the cookware 300, forming a bottom airflow diffusion, thereby driving the high-temperature flue gas through the flue gas return port 121 into the annular flue gas return channel 12, and then flowing back to the blower channel 11 along the connecting channel 16, realizing the reuse of thermal energy.

[0074] Please see Figures 1-2In some embodiments of this application, the support 14 is provided with an air supply port 142 that communicates with the receiving cavity. The air supply port 142 is connected to the first inlet 111 and is used to supply external gas into the first inlet 111.

[0075] Specifically, the air inlet 142 is designed to introduce external air, and the air entering the connecting channel 16 through the air inlet 142 is secondary air. Figure 3 The direction indicated by the dashed arrow D is the flow direction of the secondary air. In the connecting channel 16, the secondary air mixes with the returning high-temperature flue gas and is drawn into the blowing channel 11 by the fan assembly 20, and then ejected from the inner flame hole 131. The secondary air can recover the waste heat of the high-temperature flue gas for preheating and re-enter the combustion zone to participate in combustion. Increasing the temperature of the secondary air helps to improve combustion efficiency.

[0076] Meanwhile, as the blower assembly 20 generates an airflow in the blower channel 11 that flows from the first inlet 111 to the first outlet 112 and then toward the flame outlet 13, a negative pressure is generated in the connecting channel 16 through the first inlet 111. This negative pressure effect helps to enhance the flue gas recirculation efficiency and also helps to draw more external air from the air inlet 142, thereby increasing the amount of secondary air supplied.

[0077] In some embodiments, multiple air inlets 142 may be provided, and the multiple air inlets 142 are evenly spaced along the circumference of the support 14. The air inlet of the connecting channel 16 extends around the circumference of the support 14 and communicates with each air inlet 142 to ensure uniform inflow of secondary air. The multiple air inlets 142 and the connecting channel 16 work together to allow external air to enter efficiently under negative pressure. The air inlets 142 may be provided on the side wall or bottom wall of the support 14, and their number and position can be adjusted according to the structure of the burner 100 to ensure uniform replenishment of secondary air. The cross-sectional shape of the air inlets 142 may be circular, elliptical or polygonal. The position of the air inlets 142 should also be considered to avoid high-temperature concentrated areas to prevent deformation or carbon buildup of the air inlets 142 due to local overheating.

[0078] Please see Figures 4-6 In some embodiments of this application, the support 14 also has a through hole 143; the fan assembly 20 includes a fan blade 21 and a drive member 22, the fan blade 21 is disposed in the air blowing channel 11; the drive member 22 is disposed outside the air blowing channel 11, the drive shaft 23 of the drive member 22 passes through the through hole 143 and is connected to the fan blade 21 in a transmission connection to drive the fan blade 21 to rotate, and form an airflow from the first inlet 111 to the flame outlet 13 in the air blowing channel 11.

[0079] Specifically, the drive unit 22 drives the fan blades 21 to rotate within the air blowing channel 11 via the drive shaft 23, thereby generating an airflow that flows from the first inlet 111 through the first outlet 112 towards the flame outlet 13. This airflow drives the mixed gas (flue gas and secondary air) in the connecting channel 16 and the air blowing channel 11 to be ejected at high speed towards the flame outlet 13, forming a stable airflow circulation. This process not only enhances the airflow disturbance in the combustion zone and promotes complete combustion of the flame, but also improves the heat exchange efficiency between the flue gas and the bottom of the cookware 300. A sealing structure can be provided around the through hole 143 to prevent flue gas from leaking from the through hole 143 to the drive unit 22 side, affecting equipment safety. The rotational speed of the fan blades 21 can be automatically adjusted according to the combustion load to match the airflow requirements under different operating conditions, ensuring a dynamic balance between flue gas recirculation and replenishment.

[0080] Furthermore, such as Figures 5-6 As shown, the support 14 also has a gas inlet 144 that is connected to the air intake channel 141. The gas inlet 144 and the through hole 143 are spaced apart, that is, the gas inlet 144 and the through hole 143 are spatially independent, which reduces the risk of gas entering the area of ​​the drive component 22 and avoids gas leakage to the area of ​​the through hole 143, which may cause safety hazards.

[0081] Furthermore, such as Figures 1-2 As shown, at least a portion of the drive shaft 23 is within and extends along the intake channel 141, which facilitates full utilization of the internal space of the burner 100 and reduces structural interference. Furthermore, the drive component 22 is located outside the intake channel 141, meaning it is further from the combustion zone, effectively reducing the impact of high temperatures on its performance and improving its operational stability and service life. Simultaneously, the extended design of the drive shaft 23 allows for more flexible installation of the fan blades 21, enabling precise control of the airflow inlet's starting point and further optimizing the flow field distribution within the blower channel 11.

[0082] In some embodiments of this application, such as Figure 2 As shown, the main body 10 is provided with a heat insulation layer 18, which can improve the heat insulation performance of the main body 10, thereby reducing the heat loss of the main body 10 to the outside air. This allows more heat from the main body 10 to radiate to the cookware 300, further improving thermal efficiency. The heat from the main body 10 can also be transferred to the connecting channel 16, causing the temperature in the connecting channel 16 to rise. This allows the secondary air entering from the air inlet 142 to absorb more heat, resulting in a more significant heating effect. At the same time, it can also reduce the outer surface temperature of the main body 10, improving the safety of the burner 100.

[0083] The bottom of the main body 10 may be provided with a heat-insulating cavity, and the heat-insulating layer 18 may be formed by aerogel within the heat-insulating cavity. Aerogel is a solid material with a nanoporous network structure and gaseous dispersion medium filling the pores. It has the advantages of excellent heat insulation performance and light weight. The heat-insulating layer 18 formed by aerogel can play a good heat insulation role in the main body 10 without significantly increasing the overall weight of the main body 10. Of course, in other embodiments, the heat-insulating layer 18 may also be formed by other heat-insulating materials. The heat-insulating layer 18 is attached to the inner wall of the heat-insulating cavity, and there is no gap between the heat-insulating layer 18 and the inner wall of the heat-insulating cavity, which can further improve the heat insulation effect of the main body 10.

[0084] Secondly, please see Figures 7-8 This application embodiment also provides a pot frame 40 and a burner 100 as described in any of the above embodiments. The pot frame 40 is arranged around the outer periphery of the burner 100. The pot frame 40 is an annular structure with a central through hole at the center position. The pot frame 40 can be circular, but it can also be square or other shapes depending on actual needs. The central through hole can also be circular, square, or other shaped holes. The shape of the central through hole is usually adapted to the overall shape of the burner 100.

[0085] It is understandable that when using the stove 200, the burner 100 is placed at the center through hole of the pot rack 40, the pot rack 40 is arranged around the outer periphery of the burner 100, and the pot 300 (which can be a frying pan, pressure cooker, saucepan, frying pan or other types) is placed on the pot rack 40, and a combustion space is formed between the burner 100, the pot rack 40 and the pot 300.

[0086] Please see Figure 7 In some embodiments of this application, the stove 200 further includes a support plate 50, the burner 100 is disposed on the support plate 50, and the support plate 50 is provided with an annular stepped structure 51; the pot rack 40 includes an annular member 41 and a plurality of pot supports 42, the annular member 41 is disposed around the outer periphery of the burner 100 and is disposed on the stepped structure 51, and the plurality of pot supports 42 are arranged at intervals on the annular member 41.

[0087] Specifically, the burner 100 and pot rack 40 are mounted on the support plate 50, which provides more stable support for them, ensuring that they do not easily shake or tilt during use, thus improving the overall stability and safety of the stove 200. Simultaneously, the stepped structure 51 positions and limits the ring-shaped component 41, facilitating the installation and removal of the pot rack 40 and ensuring its stability during use, preventing uneven heating or tipping of the pot 300 due to misalignment. Multiple pot supports 42 support the bottom of the pot 300. These supports are of uniform height and have anti-slip textures on their upper surfaces, effectively preventing the pot 300 from sliding and ensuring stability during heating. The ring-shaped component 41 and the pot supports 42 can be integrally molded, which improves the overall structural strength and durability of the pot rack 40, while reducing assembly steps and lowering production costs.

[0088] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0089] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A burner, characterized in that, include: The main body comprises a blower channel, at least one flue gas recirculation channel, and multiple flame outlets. The blower channel has a first inlet and a first outlet. The flue gas recirculation channel has a flue gas recirculation port and a flue gas outlet. The first inlet is connected to the flue gas outlet, and the first outlet is connected to at least a portion of the flame outlets. The first outlet, the flue gas recirculation port, and the flame outlets are all upward-facing. A fan assembly, at least a portion of which is disposed within the main body, the fan assembly being used to form an airflow flowing from the first inlet to the flame outlet within the air blowing channel; The main body includes a support and a flame distributor. The support is provided with an air intake channel communicating with the flame outlet. The flame distributor includes an inner flame cap connected to the support. The air blowing channel is located on the inner flame cap. The multiple flame outlets include multiple inner flame holes. The multiple inner flame holes are located on the inner flame cap and are arranged around the outer periphery of the air blowing channel. The inner flame cap has a first chamber arranged around the periphery of the air blowing channel. The air intake channel communicates with the inner flame holes through the first chamber, and the first chamber communicates with the first outlet.

2. The burner according to claim 1, characterized in that, The support has a receiving cavity; At least a portion of the flame distributor is installed within the receiving cavity, and the flue gas outlet is connected to the first inlet through the receiving cavity.

3. The burner according to claim 2, characterized in that, The outer peripheral sidewall of the flame distributor and the inner peripheral sidewall of the support are spaced apart to form a flue gas return channel.

4. The burner according to claim 2, characterized in that, The fire distributor also includes: An outer flame cap is connected to the support, and the outer flame cap is arranged around the periphery of the inner flame cap; The plurality of flame outlets also include a plurality of external flame outlets, which are disposed on the external flame cover and are spaced apart and arranged in a circular pattern on the external flame cover.

5. The burner according to claim 4, characterized in that, The outer flame cap and the inner flame cap are spaced apart to form a flue gas recirculation channel between the outer flame cap and the inner flame cap.

6. The burner according to claim 3 or 5, characterized in that, The flue gas recirculation channel is a ring structure that surrounds the outer circumference of the blower channel.

7. The burner according to claim 2, characterized in that, The support is provided with an air inlet that communicates with the receiving cavity. The air inlet is connected to the first inlet and is used to allow external gas to flow into the first inlet.

8. The burner according to claim 2, characterized in that, The support also has a through hole; the fan assembly includes: Fan blades are disposed within the air blowing channel; A drive unit is disposed outside the air blowing channel. The drive shaft of the drive unit passes through the through hole and is connected to the fan blade to drive the fan blade to rotate and form an airflow from the first inlet to the first outlet in the air blowing channel.

9. The burner according to claim 8, characterized in that, The support also has a gas inlet communicating with the air intake channel, and the gas inlet is spaced apart from the through hole.

10. The burner according to claim 8, characterized in that, At least a portion of the drive shaft is within and extends along the intake passage, and the drive element is located outside the intake passage.

11. The burner according to claim 2, characterized in that, The flame distributor is spaced apart from the bottom wall of the receiving cavity to form a connecting channel. The flame distributor is provided with a baffle structure extending toward the connecting channel. The baffle structure encloses and forms part of the gas blowing channel. The first inlet is provided in the baffle structure and is connected to the flue gas outlet through the connecting channel.

12. The burner according to claim 1, characterized in that, The main body is provided with a heat insulation layer.

13. A stove, characterized in that, It includes a pot frame and a burner according to any one of claims 1 to 12, the pot frame being disposed around the outer periphery of the burner.

14. The stove according to claim 13, characterized in that, The stove also includes a support plate, the burner is mounted on the support plate, and the support plate has an annular stepped structure. The pot support includes an annular component and multiple pot supports. The annular component is arranged around the outer periphery of the burner and is disposed on the stepped structure. The multiple pot supports are arranged at intervals on the annular component.

Images