Combustor and stove

Abstract

The combustor comprises an inner combustion part, an outer combustion part, an air blowing device and a flow guide structure. Inner fire holes are formed in the top of the inner combustion part; the outer combustion part is annularly arranged on the outer side of the inner combustion part, the outer combustion part and the inner combustion part are spaced to form a gas passing channel, and outer fire holes are formed in the top of the outer combustion part; the blower device is communicated with the air passing channel and is used for blowing secondary air into the air passing channel; the flow guide structure is annularly arranged and arranged at the top of the air passing channel, and the flow guide structure is used for guiding secondary air introduced through the air passing channel to the inner fire holes and the outer fire holes correspondingly. According to the technical scheme, the combustion efficiency of the combustor can be improved.

Description

Technical Field

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

[0002] As an essential kitchen appliance, a stove typically includes a pot stand and a burner. The pot stand supports the pot. When the burner is in operation, primary air mixed with gas is ejected from the burner's flame hole. This is ignited by an ignition device and then, with the help of secondary air, forms a flame that heats the pot placed on the pot stand. However, the combustion efficiency of burners in related technologies remains suboptimal. Utility Model Content

[0003] The embodiments of the present application provide a burner and a stove, which can improve the combustion efficiency of the burner.

[0004] In the first aspect, an embodiment of the present application provides a burner, which includes an inner combustion part, an outer combustion part, an air blowing device and a guide structure; an inner fire hole is provided at the top of the inner combustion part; the outer combustion part is arranged in a ring on the outside of the inner combustion part, and an air passage is formed between the outer combustion part and the inner combustion part, and an outer fire hole is provided at the top of the outer combustion part; the air blowing device is connected to the air passage and is used to blow secondary air into the air passage; the guide structure is arranged in an annular shape and is arranged at the top of the air passage, and the guide structure is used to guide the secondary air introduced into the air passage to the inner fire hole and the outer fire hole respectively.

[0005] In some embodiments, the inner combustion portion includes an inner ring fire cover having a plurality of inner fire holes, and the outer combustion portion includes an outer ring fire cover having a plurality of outer fire holes.

[0006] The guide structure is spaced apart from the inner ring fire cover and forms a first guide channel, and the guide structure is spaced apart from the outer ring fire cover and forms a second guide channel;

[0007] The first guide channel and the second guide channel are both communicated with the air passage, and are used to guide the secondary air introduced into the air passage to the inner fire hole and the outer fire hole respectively.

[0008] In some embodiments, the guide structure includes a first guide plate, a connecting plate, and a second guide plate sequentially connected in a direction from the inner combustion portion to the outer combustion portion, the first guide plate extends toward the inner ring fire cover, the second guide plate extends above the outer ring fire cover, the first guide plate and the inner ring fire cover define the first guide channel, and the second guide plate and the outer ring fire cover define the second guide channel;

[0009] Wherein, the first guide plate is perpendicular to the normal direction of the inner fire hole located on the outer side of the inner ring fire cover;

[0010] The lower surface of the second guide plate is parallel to the inner portion of the upper surface of the outer ring fire cover.

[0011] In some embodiments, the distance between the lower surface of the second guide plate and the upper surface of the outer ring fire cover is 1 mm to 2 mm.

[0012] In some embodiments, along the up-down direction of the burner, an end of the first guide plate away from the connecting plate is lower than the inner fire hole on the inner ring fire cover.

[0013] In some embodiments, when projected along the axial direction of the burner, the projection of the second guide plate on the burner does not cover the outer fire hole of the outer ring fire cover;

[0014] The distance between the projection of the second guide plate and the projection of the outer fire hole on the inner ring of the outer ring fire cover is 0.5 mm to 2 mm.

[0015] In some embodiments, a connecting spoke is further included, wherein the connecting spoke is disposed in the air passage, and two ends of the connecting spoke are respectively connected to the inner combustion part and the outer combustion part;

[0016] The flow-guiding structure is overlapped on the connecting spokes.

[0017] In some embodiments, the flow guide structure includes a plurality of diverter plates, which are spaced apart above the air passage to guide the secondary air to the inner combustion portion and the outer combustion portion, respectively.

[0018] In some embodiments, the air blowing device includes a blower and an air duct member, the air duct member includes an air supply pipe and an annular air duct plate, the annular air duct plate is sealed at the bottom of the inner combustion portion and the outer combustion portion, and has an air supply channel formed therein, the air supply channel being connected to the air passage;

[0019] The air supply pipe is connected to the air outlet of the fan and the air supply channel.

[0020] In some embodiments, the annular air duct plate includes an inner annular wall, an annular bottom wall and an outer annular wall which are connected in sequence in the direction from the inner combustion section to the outer combustion section, the inner annular wall is sealed against the bottom of the inner combustion section, and the outer annular wall is sealed against the bottom of the outer combustion section.

[0021] In some embodiments, the air guide structure is detachably connected to the air duct member.

[0022] In some embodiments, a connecting column is further included, which extends in the air passage. One end of the connecting column is connected to the flow guide structure, and the other end is detachably connected to the air duct member via a connecting member.

[0023] In a second aspect, an embodiment of the present application provides a stove comprising a burner as described above and a pot rack; the pot rack is arranged in a ring shape and is arranged around the outside of the burner.

[0024] In some embodiments, the pot rack includes a pot rack body, the pot rack body having a central through hole for mounting the burner, the pot rack body having an inner side surface arranged toward the central through hole, a distance between the inner side surface and the projection of the outer surface of the burner in the up and down directions of the cooker, and the distance between the projection of the inner side surface and the outer surface of the burner is 0.5 mm to 3 mm.

[0025] In some embodiments, a heat-insulating cavity is formed in the pot support body and is arranged around the burner.

[0026] Based on the burner of the embodiment of the present application, the guide structure is arranged in a ring shape and is arranged at the top of the air passage. It can preheat the secondary air entering the air passage and guide the secondary air to the inner combustion part and the outer combustion part respectively, so as to realize precise directional guidance of the preheated secondary air, ensure that the secondary air can be evenly distributed to the inner fire hole and the outer fire hole, so as to avoid excessive or weak airflow in local areas, ensure the consistency and uniformity of the flow field, ensure that the secondary air on the burner surface can be fully replenished, and thereby improve the combustion efficiency and combustion stability of the burner.

[0027] In addition, the flue gas generated by the combustion of the burner has a relatively high temperature. When the flue gas flows along the upper surface of the guide structure, it can heat the guide structure and increase the temperature of the guide structure. The high-temperature guide structure will also preheat the secondary air, making the heat exchange more sufficient. The burner can thus recover waste heat and provide more oxygen required for combustion. The recovered waste heat can also be used to preheat the secondary air, which helps to achieve more complete combustion and reduce the discharge of unburned gas. The heat in the burner is more effectively utilized, reducing the heat that needs to be taken away through exhaust, thereby reducing the exhaust temperature. Moreover, since the waste heat is recovered, the exhaust flue gas temperature is reduced, reducing the waste of heat energy, and improving the thermal efficiency of the burner, thereby further improving the combustion efficiency of the stove. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of an embodiment of the stove of the present application;

[0030] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the cooker shown in FIG;

[0031] Figure 3 for Figure 1 A schematic cross-sectional view of a stove shown in FIG;

[0032] Figure 4 for Figure 3 An enlarged schematic diagram of the cooker at point A shown in FIG;

[0033] Figure 5 for Figure 3 Schematic diagram of the exploded structure of the burner shown in FIG;

[0034] Figure 6 for Figure 5 A partial cross-sectional schematic diagram of a burner is shown in FIG.

[0035] Description of Figure Numbers:

[0036] 100, burner; 10, inner combustion unit; 11, inner ring fire cover; 111, inner fire hole; 20, outer combustion unit; 21, outer ring fire cover; 211, outer fire hole; 30, air blast device; 31, fan; 32, air duct member; 321, air supply pipe; 322, annular air duct plate; 3221, air supply channel; 3222, inner ring wall; 3223, annular bottom wall; 3224, outer ring wall; 40, flow guide structure; 40a, first flow guide channel; 40b, second flow guide channel; 41, first flow guide plate; 42 , connecting plate; 43, second guide plate; 44, groove; 50, air passage; 60, gas distribution plate; 61, connecting spokes; 62, connecting air duct; 70, connecting column; 200, pot rack; 210, pot rack body; 210a, central through hole; 210b, inner side; 210c, heat insulation cavity; 2101, top plate; 2101a, guide surface; 2101b, energy-gathering trough; 2101c, near-fire convex ring; 2102, bottom plate; 220, pot support foot; 230, supporting leg; 1000, stove.

[0037] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of this application clearer, the following part will further describe the embodiments of this application in detail with reference to the accompanying drawings.

[0039] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application, as detailed in the appended claims.

[0040] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0042] As essential kitchen appliances, stoves are increasingly being considered energy-efficient and environmentally friendly. Internal-flame gas stoves, with their significant energy-saving benefits, have garnered widespread attention. A stove typically consists of a burner and a pot stand. The burner includes a gas distribution plate, a burner head, and a flame cap. The burner is connected to the gas distribution plate and primarily mixes the gas with primary air, adjusting the air-gas ratio and supplying gas to the gas distribution plate. The flame cap, mounted on the gas distribution plate and equipped with flame holes, evenly distributes the mixed gas to each burner, ensuring uniform heating of the pot.

[0043] During operation, gas enters the burner through the inlet pipe, passes through the gas valve (adjusted by the user via a knob), and enters the burner head. It is mixed with a portion of air (this air is called primary air). This mixed gas passes through the gas distributor and is ejected from the flame holes in the burner cover. It is then ignited by the ignition device to form a flame (the air required for combustion is called secondary air). This flame is used to heat the pot placed on the pot rack. However, the combustion efficiency of kitchen stoves in related technologies is still not ideal and cannot better meet user needs.

[0044] To resolve the above issues, please refer to Figures 1 to 3 The present application proposes a stove 1000 . In an embodiment of the present application, the stove 1000 includes a pot rack 200 and a burner 100 .

[0045] The pot rack 200 is used to be placed on a stove (not shown in the figure) and to support the pot to prevent the pot from sliding or tipping over during heating, reduce the occurrence of accidental injuries, and ensure the stability of the pot during cooking.

[0046] The burner 100 includes an inner combustion section 10, an outer combustion section 20, a blasting device 30, and a flow guide structure 40. The inner combustion section 10 is provided with an inner fire hole 111 at the top. The outer combustion section 20 is arranged around the outer side of the inner combustion section 10, and an air passage 50 is formed between the outer combustion section 20 and the inner combustion section 10. The outer combustion section 20 is provided with an outer fire hole 211 at the top. The inner combustion section 10 includes an inner fire cover 11 with multiple inner fire holes 111, and the outer combustion section 20 includes an outer fire cover 21 with multiple outer fire holes 211.

[0047] A gas passage (not shown in the figure) is also formed inside the burner 100, and the inner fire hole 111 and the outer fire hole 211 are both connected to the gas passage. The burner 100, the pot rack 200 and the cookware form a combustion space. A mixed gas containing gas and primary air is ejected from the inner fire hole 111 and the outer fire hole 211 of the burner 100 and ignited by the ignition device. Flames are formed with the help of secondary air. These flames can be used to heat the cookware in the combustion space.

[0048] The blower device 30 is connected to the air passage 50. When working, the blower device 30 blows secondary air into the air passage 50, thereby supplying air to the inner combustion part 10 and the outer combustion part 20. The role of secondary air in the combustion process is mainly to provide additional oxygen to support combustion, while helping gas mixing and heat transfer in the burner 100, thereby improving the combustion efficiency and temperature uniformity of the burner 100.

[0049] The blast device 30 can increase the speed and pressure of gas delivery, thereby improving the efficiency of gas supply from the gas passage 50 to the burner 100, ensuring sufficient gas supply during combustion of the burner 100, thereby improving the combustion efficiency of the burner 100. The blast device 30 supplies gas to the inner combustion section 10 and the outer combustion section 20, thereby achieving a more uniform supply of gas to the burner 100, which helps to achieve stability and controllability of the combustion process.

[0050] The guide structure 40 is annular and is arranged at the top of the air passage 50. The technical solution of the present application adopts the guide structure 40. The guide structure 40 can preheat the secondary air entering the air passage 50 and guide the secondary air to the inner fire hole 111 and the outer fire hole 211 respectively, thereby achieving precise directional guidance of the preheated secondary air, ensuring that the secondary air can be evenly distributed to the inner fire hole 111 and the outer fire hole 211, so as to avoid excessive or weak airflow in local areas, ensure the consistency and uniformity of the flow field, ensure that the secondary air on the surface of the burner 100 can be fully replenished, and thus improve the combustion efficiency and combustion stability of the burner 100. The material of the guide structure 40 should have good heat resistance, corrosion resistance and high thermal conductivity to adapt to high-temperature combustion environments. For example, stainless steel, copper alloy or other metal materials can be selected.

[0051] In some structural forms, the burner 100 may also include a gas distribution plate 60, and the inner ring fire cover 11 and the outer ring fire cover 21 are arranged above the gas distribution plate 60. The gas distribution plate 60 is connected to the inner ring fire cover 11 to form an inner combustion part 10, and the gas distribution plate 60 is connected to the outer ring fire cover 21 to form an outer combustion part 20, which is used to fully mix the gas and air.

[0052] The gas distributor 60 is made of a material with excellent thermal conductivity, for example, it can be made of metal cast iron, cast steel, etc. In order to further enhance the structural strength, improve durability, and simplify the production process, the gas distributor 60 can be formed as an integral structure and can be produced by casting; of course, the gas distributor 60 can also be set in a split manner, for example, the gas distributor 60 can be set as an gas distributor ring and a gas distributor seat connected in an upper and lower manner to adapt to different production requirements. The present application does not limit the structural form of the gas distributor 60.

[0053] In some embodiments, the guide structure 40 is spaced apart from the inner ring fire cover 11 and forms a first guide channel 40a, and the guide structure 40 is spaced apart from the outer ring fire cover 21 and forms a second guide channel 40b. The first guide channel 40a and the second guide channel 40b are both connected to the air passage 50, and are used to guide the secondary air entering the air passage 50 to the inner fire hole 111 and the outer fire hole 211 respectively. This arrangement allows the secondary air to have different flow directions after entering the air passage 50, and can be accurately guided in the direction of the inner fire hole 111 and the outer fire hole 211, while meeting the air supply needs of the inner combustion part 10 and the outer combustion part 20, so that the burner 100 has a better flow field distribution effect, thereby improving the combustion efficiency of the burner 100.

[0054] The flue gas generated by the burner 100 has a relatively high temperature. When the flue gas flows along the upper surface of the guide structure 40, it heats the guide structure 40, raising its temperature. When the secondary air passes through the lower surface, that is, when the secondary air flows through the first and second guide channels 40a and 40b, the high-temperature guide structure 40 also preheats the secondary air, enabling more complete heat exchange. The burner 100 is thus able to recover waste heat and provide more oxygen required for combustion. The recovered waste heat can also be used to preheat the secondary air, contributing to more complete combustion and reducing the amount of unburned gas discharged. The heat within the burner 100 is more efficiently utilized, reducing the amount of heat that needs to be removed through exhaust, thereby lowering the exhaust temperature. Furthermore, because the waste heat is recovered, the exhaust flue gas temperature is lowered, reducing heat energy waste and improving the thermal efficiency of the burner 100, thereby further improving the combustion efficiency of the stove 1000.

[0055] The guide structure 40 can be an integrally formed structure, or it can be a split type. In one structural form, the guide structure 40 includes a first guide plate 41, a connecting plate 42, and a second guide plate 43 that are sequentially connected in the direction from the inner combustion part 10 to the outer combustion part 20. The first guide plate 41, the connecting plate 42, and the second guide plate 43 are integrally formed to enhance structural strength. Among them, the connecting plate 42 can enhance the connection strength between the first guide plate 41 and the second guide plate 43, thereby ensuring the structural stability of the guide structure 40. It is understandable that the guide structure 40 does not need to be provided with a connecting plate 42, but the first guide plate 41 is connected to the second connecting plate 42. This can simplify the structural form of the guide structure 40 and reduce production costs. At the same time, the first guide plate 41 and the second connecting plate 42 can still guide the secondary air to the inner combustion part 10 and the outer combustion part 20 respectively, thereby improving combustion efficiency.

[0056] The first guide plate 41 extends toward the inner ring fire cover 11, and the second guide plate 43 extends to the top of the outer ring fire cover 21. The first guide plate 41 and the inner ring fire cover 11 define a first guide channel 40a, and the second guide plate 43 and the outer ring fire cover 21 define a second guide channel 40b. With this arrangement, the first guide plate 41 and the second guide plate 43 extend in different directions, and the secondary air in the air passage 50 can be guided to the inner fire hole 111 and the outer fire hole 211 by the first guide channel 40a and the second guide channel 40b respectively, avoiding airflow disturbance to form a stable airflow field, preventing the flame from being unstable due to airflow disturbance, and being able to simultaneously meet the air supply requirements of the inner fire hole 111 and the outer fire hole 211, ensuring sufficient secondary air supply, thereby improving combustion efficiency.

[0057] Among them, the first guide plate 41 is perpendicular to the normal direction of the inner fire hole 111 located on the outside of the inner ring fire cover 11, which can more quickly guide the secondary air from the first guide channel 40a directly to the inner fire hole 111, thereby avoiding heat loss and improving heat transfer efficiency; the lower surface of the second guide plate 43 is parallel to the inner part of the upper surface of the outer ring fire cover 21, ensuring that the second airflow channel has a more uniform guiding effect, and can guide the gas flow more smoothly, thereby ensuring combustion efficiency.

[0058] In another structural form, the guide structure 40 is a split type setting, and the guide structure 40 includes a plurality of diverter plates, and the plurality of diverter plates are spaced apart and arranged above the air passage 50, for guiding the secondary air to the inner combustion part 10 and the outer combustion part 20 respectively. The plurality of diverter plates can be connected to the gas distribution plate 60, and the connection methods include but are not limited to: snap connection, welding, riveting, screw connection or interference fit connection. In this way, it is convenient to produce and shape the plurality of diverter plates separately, improve production efficiency, and facilitate assembly, replacement or cleaning of a single diverter plate. It is understandable that the guide structure 40 can be other structural forms in addition to the above-mentioned structural form. For example, the guide structure 40 can be formed into a bent plate structure that bends toward the inner combustion part 10 and the outer combustion part 20, and the present application is not limited thereto.

[0059] Please refer to Figure 4. Figure 6The distance between the lower surface of the second guide plate 43 and the upper surface of the outer ring fire cover 21 is L1. The value range of L1 can be 1mm~2mm, which can ensure that there is space for gas circulation in the second air flow channel, thereby ensuring the air supply. At the same time, in the actual production and installation process, the problem of interference between the second guide plate 43 and the outer ring fire cover 21 caused by errors can be avoided, thereby ensuring that the secondary air can circulate evenly and smoothly in the second air flow channel. When L1 is less than 1mm, the second guide plate 43 is closer to the outer ring fire cover 21, making the second air flow channel narrower, so that the amount of secondary air entering will be insufficient, resulting in a decrease in combustion efficiency; when L1 is greater than 2mm, the second guide plate 43 is further away from the outer ring fire cover 21, occupying more space above, and the secondary air will be more likely to leak from the second guide channel 40b, reducing the air supply of the outer ring fire cover 21, which will also lead to a decrease in combustion efficiency. Therefore, the value of L1 can be 1mm, 1.5mm, 1.8mm or 2mm, etc.

[0060] In some embodiments, along the up and down direction of the burner 100, the end of the first guide plate 41 away from the connecting plate 42 is lower than the inner fire hole 111 on the inner ring fire cover 11, and the first guide plate 41 can guide the secondary air to flow completely from bottom to top to and cover the inner fire hole 111, and the first guide plate 41 will not cause obstruction in the fire direction of the inner fire hole 111, thereby increasing the coverage area of ​​the flame and the concentration of firepower, thereby further improving the combustion efficiency.

[0061] Projected along the axial direction of the burner 100, the projection of the second guide plate 43 on the burner 100 does not cover the outer fire hole 211 of the outer ring fire cover 21. Therefore, the second guide plate 43 will not hinder the fire from the outer fire hole 211, ensuring that the outer fire hole 211 can fire stably. The second guide plate 43 will not cover the outer fire hole 211, so that the outer fire hole 211 can be directly cleaned and maintained, ensuring the fire efficiency of the outer fire hole 211, thereby improving the combustion efficiency, and avoiding local overheating of the guide structure 40 caused by direct contact of the second guide plate 43 with the flame, thereby increasing the service life of the guide structure 40.

[0062] It should be noted that the distance between the projection of the second guide plate 43 and the projection of the outer fire hole 211 on the inner ring of the outer ring fire cover 21 is L2, and the value range of L2 can be 0.5mm~2mm, so as to further ensure that the second guide plate 43 does not cover the outer fire hole 211. When L2 is less than 0.5mm, due to the errors existing in the actual production and manufacturing process, the second guide plate 43 may partially cover the outer fire hole 211, thereby affecting the fire output of the outer fire hole 211; when L2 is greater than 2mm, the end of the second guide plate 43 extending toward the outer ring fire cover 21 is far away from the outer fire cover, which will cause the second guide plate 43 to have a poor guiding effect, and the airflow is easy to escape from the second airflow channel, resulting in reduced combustion efficiency. Therefore, the value of L2 can be 0.5mm, 1mm, 1.5mm, 1.8mm or 2mm, etc.

[0063] In some embodiments, the burner 100 further includes a connecting spoke 61, which is disposed in the air passage 50, and the two ends of the connecting spoke 61 are respectively connected to the inner combustion section 10 and the outer combustion section 20. Specifically, a connecting air passage 62 is disposed in the connecting spoke 61, and the two ends of the connecting air passage 62 are respectively connected to the inner combustion section 10 and the outer combustion section 20. The gas mixture of gas and air can be conducted in the connecting air passage 62 and enter the inner combustion section 10 and the outer combustion section 20, so that the gas mixture of gas and air flows evenly and fully in the inner combustion section 10 and the outer combustion section 20, thereby making the combustion of the mixed gas more complete, improving the combustion efficiency, and thus improving the energy efficiency level of the burner 100.

[0064] In one embodiment, a plurality of communication passages 62 are provided, and the plurality of communication passages 62 can be uniformly distributed along the circumference of the inner combustion section 10 and the outer combustion section 20. Furthermore, the cross-section of the communication passages 62 perpendicular to the axial direction of the burner 100 is approximately fan-shaped and uniformly distributed along the circumference of the burner 100. In this way, the mixed gas can enter the inner combustion section 10 and the outer combustion section 20 more evenly through the plurality of annular communication passages 62, thereby improving combustion efficiency. It will be appreciated that in other embodiments, the plurality of communication passages 62 can also be provided according to actual requirements and is not limited to the embodiment discussed above.

[0065] The guide structure 40 is overlapped on the connecting spokes 61 , and the connecting spokes 61 can support and fix the guide structure 40 from below, ensuring that the guide structure 40 can be stably installed on the top of the air passage 50 .

[0066] Specifically, the first guide plate 41 is connected to the connecting plate 42 and is recessed in the vertical direction of the burner 100 to form a groove 44. The lower surface of the guide structure 40, which faces away from the groove wall of the groove 44, overlaps the upper surface of the connecting spoke 61. This allows the guide structure 40 to be more stably attached to the gas distribution plate 60, making installation of the guide structure 40 more convenient and reducing manufacturing costs. Accordingly, the upper surface of the connecting spoke 61 can also be formed with a retaining groove that adapts to the lower surface, which faces away from the groove wall of the groove 44. When the guide structure 40 overlaps the connecting spoke 61, the bottom wall of the groove 44 can be snapped into the retaining groove, thereby achieving rapid installation and position control of the guide structure 40 and further improving the structural connection stability of the guide structure 40.

[0067] It should be noted that the outward-flowing flue gas can also flow and gather in the groove 44, which can increase the residence time of the flue gas in the combustion space. In addition, the groove 44 can prevent the heat of the flue gas from radiating outward, thereby improving the heat exchange efficiency between the flue gas and the cookware. When the flue gas is discharged from the combustion space, when it flows to the groove 44, the flue gas first flows downward to the bottom of the groove 44, and then climbs upward out of the groove 44, causing the flue gas to flow more circuitously during the flow process, thereby making it easier for the flue gas to form vortices during the flow process, which can enhance the disturbance of the flue gas in the combustion space, so that the flue gas can stay in the combustion space for a longer time, thereby fully utilizing the heat energy carried by the flue gas.

[0068] Furthermore, the flow-guiding structure 40 will not block the air passage 50 in the upper and lower directions, thereby ensuring smooth air flow through the air passage 50 and preventing secondary air from leaking from other paths, so that the supplementary secondary air can be concentrated in the combustion area, allowing the fuel to burn more fully and reducing the content of harmful gases in the flue gas.

[0069] At the same time, during the cooking process, the groove 44 can also receive the liquid and kitchen residue that fall from the pot above, preventing the liquid and other impurities from overflowing into the burner 100 and blocking the inner fire hole 111 and the outer fire hole 211, and preventing impurities from entering the air passage 50 from above, affecting the smooth flow of secondary air, and making it more convenient to clean and maintain the burner 100.

[0070] In some embodiments, the blowing device 30 includes a fan 31 and an air duct member 32, the air duct member 32 includes an air supply pipe 321 and an annular air duct plate 322, the annular air duct plate 322 is sealed at the bottom of the inner combustion part 10 and the outer combustion part 20, and an air supply channel 3221 is formed inside, the air supply channel 3221 is connected to the air passage 50, the air supply pipe 321 is connected to the air outlet of the fan 31 and the air supply channel 3221, the fan 31 can blow secondary air to the air supply pipe 321, the air supply pipe 321 can rectify the air flow blown out by the fan 31, and the air flow that is uniformly slowed down is discharged from the air supply pipe 321. The tube 321 blows into the annular air duct disk 322 and circulates along the circumferential direction of the annular air duct disk 322 to further uniformly slow down the airflow, and then guides it into the air passage 50 through the air supply channel 3221, thereby avoiding the airflow blown out by the fan 31 from directly impacting the inner fire hole 111 and the outer fire hole 211 of the burner 100 and causing unstable flames, reducing safety hazards, and improving the air supply efficiency of the burner 100 through the air passage 50 during the combustion process, thereby achieving uniform and stable secondary air supply to the burner 100, thereby improving the combustion efficiency of the burner 100.

[0071] It can be understood that since the annular air duct plate 322 is sealed at the bottom of the inner combustion section 10 and the outer combustion section 20, the secondary air can be rectified at the bottom of the inner combustion section 10 and the outer combustion section 20 when it is supplied by the air supply pipe 321, so that the airflow is evenly diffused at the bottom of the inner combustion section 10 and the outer combustion section 20, and the airflow is more stable and uniform when it is guided to the inner combustion section 10 and the outer combustion section 20 by the guide mechanism, thereby improving the guide effect and further improving the combustion efficiency.

[0072] The annular air duct disc 322 includes an inner annular wall 3222, an annular bottom wall 3223, and an outer annular wall 3224, which are sequentially connected in the direction from the inner combustion section 10 to the outer combustion section 20. The inner annular wall 3222 is in sealed contact with the bottom of the inner combustion section 10, and the outer annular wall 3224 is in sealed contact with the bottom of the outer combustion section 20. As a result, a closed annular airflow space is formed at the bottom of the inner combustion section 10 and the outer combustion section 20, which can prevent air from leaking out from the bottom of the inner combustion section 10 and the outer combustion section 20, reduce airflow disturbances caused by leakage, ensure sufficient air supply to the burner 100, and reduce heat loss. After the air flow blown by the fan 31 passes through the air supply pipe 321 and blows to the annular air duct disc 322, it can circulate inside the annular air duct disc 322, ensuring uniform and stable airflow. The above-mentioned sealing abutment can include, but is not limited to, interference fit, fastener connection, welding, or the use of a sealing gasket at the sealing connection, and this application is not limited to this.

[0073] In some embodiments, the air guide structure 40 is detachably connected to the air duct member 32. The detachable connection forms of the air guide structure 40 and the air duct member 32 include but are not limited to screw connection, snap connection, interference fit, etc. In this way, the air guide structure 40 and the air duct member 32 can be manufactured separately, which is convenient for manufacturing and molding, and then the two are connected after molding. For example, any one of the above connection methods can be adopted, or a combination of multiple connection methods can be adopted, such as through the combination of snap connection and threaded connection, or through the combination of interference fit and snap connection, which can further improve the air guide structure 40 and the air duct member 32, and at the same time facilitate the disassembly and cleaning of the two, and facilitate cleaning and maintenance.

[0074] In some structural forms, the burner 100 further includes a connecting post 70 extending within the gas passage 50. One end of the connecting post 70 is connected to the flow guide structure 40, and the other end is detachably connected to the air duct member 32 via a connector. The connecting posts 70 can be spaced apart circumferentially around the annular air duct plate 322, thereby circumferentially connecting and securing the flow guide structure 40, further improving the connection stability of the flow guide structure 40.

[0075] When the stove 1000 is in operation and ignites, a flame detector (such as a thermocouple or ion detector) senses the presence of a flame and sends a signal to a control system. The control system then activates the fan 31 to provide sufficient secondary air to the burner 100 to ensure sufficient combustion of the gas. The fan 31 can also be automatically regulated by adjusting its rotational speed based on the size and stability of the flame. This helps maintain good combustion efficiency and allows the combustion state to be adjusted according to actual needs, thereby reducing energy waste and pollutant emissions. Furthermore, the fan 31's speed can also be regulated by a variable frequency drive or other type of motor controller.

[0076] When the user turns off the stove 1000, the flame detector senses that the flame is extinguished, the fan 31 is turned off, and the control system turns off the fan 31 after the flame is extinguished. It should be noted that the fan 31 can be delayed from being turned off after the flame is extinguished to ensure that the gas is completely burned. This can prevent unburned gas from remaining in the stove 1000, thereby improving safety and ensuring safe operation and efficient combustion of the stove 1000.

[0077] In some embodiments, please refer again to Figures 1 to 3 The pot support 200 is annular and is disposed outside the burner 100. The pot support 200 includes a pot support body 210, which has a central through hole 210a for mounting the burner 100. The pot support body 210 can be annular, but can also be square or other shapes depending on actual needs. The central through hole 210a can also be circular, square, or other shaped.

[0078] The pot support body 210 can be a one-piece structure to ensure support strength, simplify the manufacturing process, reduce assembly steps, and reduce costs. Of course, the pot support body 210 can also be a separate structure for easier cleaning and maintenance. The pot support body 210 can be made of cast iron, enameled, or galvanized materials with advantages such as high temperature resistance and good strength.

[0079] In addition, the annular pot rack body 210 can separate the high-temperature flame generated by the burner 100 from the external environment, reduce the impact of the external low-temperature airflow on the flame and the loss of combustion heat, and at the same time allow the high-temperature flue gas to stay in the combustion space for a longer time, so that the high-temperature flue gas has enough time to fully exchange heat with the bottom surface of the pot, thereby improving the heat exchange efficiency and the overall thermal efficiency of the burner 100.

[0080] In some embodiments, the pot stand 200 further includes pot legs 220 and support legs 230. A heat-insulating cavity 210c is formed within the pot stand body 210, surrounding the burner 100. The pot stand body 210 includes at least a top plate 2101 and a bottom plate 2102. The bottom plate 2102 is connected to the top plate 2101 along the vertical direction of the pot stand 200. The pot legs 220 are disposed on the top plate 2101, and the support legs are disposed on the bottom plate 2102. The bottom plate 2102 and the top plate 2101 cooperate to form a heat-insulating cavity 210c. This heat-insulating cavity 210c reduces heat loss from the central through hole 210a away from the pot stand body 210, further improving the overall combustion efficiency of the stove 1000.

[0081] Of course, the present application is not limited to this. In other embodiments, the pot rack body 210 may further include, in addition to the top plate 2101 and the bottom plate 2102, a middle partition plate sandwiched between the top plate 2101 and the bottom plate 2102 to further divide the heat insulation cavity 210c into multiple sub-cavities, which can further reduce the probability of heat dissipation from the pot rack body 210. As for the number and form of the sub-cavities, this embodiment does not limit this.

[0082] The pot legs 220 are mounted on the top plate 2101 of the pot support body 210 and are used to support the pot bottom plate 2102. Optionally, the pot legs 220 can be elongated to increase the connection area between the pot legs 220 and the pot bottom plate 2102. The pot legs 220 can enhance the stability of the pot support, prevent the pot from sliding or tipping over during heating, reduce the risk of accidental injuries, and ensure a stable cooking process. Furthermore, the pot legs 220 can be made of a high-temperature resistant material such as cast iron, although this is not a limitation in this embodiment. There can be multiple pot legs 220, each of which is connected to the top plate 2101 of the pot support body 210 along the circumference of the pot support body 210. This improves the pot support along the circumference of the pot support body 210.

[0083] The support legs 230 are provided on the bottom plate 2102 of the pot rack body 210, and are used to be placed on the countertop of the stove and support the pot rack body 210. There are multiple support legs 230, and the multiple support legs 230 are connected to the pot rack body 210 at intervals along the circumference of the pot rack 200 to improve the stability of the pot rack body 210.

[0084] The connection between the pot support legs 220 and the support legs 230 and the pot rack body 210 can be welding or integrally formed. Here, the connection between the pot support legs 220 and the pot rack body 210 and the connection between the support legs 230 and the pot rack body 210 are not specifically limited.

[0085] It should be noted that when using the pot rack 200, the burner 100 is placed at the central through hole 210a of the pot rack body 210, and the pot rack body 210 is arranged around the burner 100. The pot is placed on the pot support feet 220 of the pot rack 200. The burner 100, the pot rack 200 and the pot form a combustion space. The pot support feet 220 separate the pot from the pot rack body 210, so that an air passage space is formed between the bottom surface of the pot and the top plate 2101 of the pot rack body 210. The smoke generated by the burner 100 during combustion can be discharged from the combustion space through the air passage space, and the high-temperature flame generated by the burner 100 passes through the central through hole 210a to heat the pot.

[0086] In some embodiments, as Figure 3 As shown in FIG and FIG, the pot support body 210 further includes an inner side surface 210b disposed toward the central through hole 210a. A distance L3 is defined between the inner side surface 210b and the outer surface of the burner 100 projected in the vertical direction of the cooktop 1000. This ensures that installation space is retained between the pot support body 210 and the burner 100 to accommodate various manufacturing requirements. Furthermore, secondary air can flow into the burner 100 from the distance L3 between the pot support body 210 and the burner 100, thereby providing the burner 100 with the secondary air required for combustion, thereby further improving the combustion efficiency of the cooktop 1000. It is understood that when the air blowing device 30 has a high power and can ensure sufficient secondary air supply to the burner 100, the distance L3 between the pot support body 210 and the burner 100 can be omitted, while still ensuring combustion efficiency of the burner 100.

[0087] Specifically, if there is a gap between the inner surface 210b and the outer surface of the burner 100 projected in the vertical direction of the cooktop 1000, the value of L3 can range from 0.5mm to 3mm. When L3 is less than 0.5mm, meaning the gap between the pot support body 210 and the burner 100 is too small, the secondary air supply will be insufficient. When L3 is greater than 3mm, meaning the gap between the pot support body 210 and the burner 100 is too large, gas will leak between the pot support body 210 and the burner 100, causing heat loss and reducing thermal efficiency. Furthermore, the cooktop 1000 will be larger in size, making it less adaptable to different usage requirements. The value of L3 can be 0.5mm, 1mm, 2mm, 2.8mm, or 3mm, among others.

[0088] In some embodiments of the present application, the top plate 2101 of the pot rack 200 includes a guide surface 2101a, and the top plate 2101 of the pot rack body 210 is also provided with an energy-gathering trough 2101b and a near-fire convex ring 2101c. The guide surface 2101a, the energy-gathering trough 2101b and the near-fire convex ring 2101c are arranged in sequence toward the inner side of the pot rack body 210.

[0089] The distance between the convex top of the fire-proximal protrusion 2101c and the top surface of the pot support leg 220 in the axial direction of the pot support body 210 is less than the distance between the inner edge of the pot support body 210 and the top surface of the pot support leg 220 in the axial direction of the pot support body 210. It should be understood that the axial direction of the pot support body 210 is parallel to the extension direction of the centerline of the central through hole 210a. When the pot support 200 is placed on a table or countertop, and the centerline of the central through hole 210a is perpendicular to the horizontal plane, the axial direction of the pot support body 210 is perpendicular to the horizontal plane. The top surface of the pot support leg 220 is the bearing surface for contacting the bottom surface of the pot and can be parallel to the horizontal plane. The outer edge of the pot support body 210 is the junction between the outer side surface of the pot support body 210 and the top surface of the pot support body 210, and the inner edge of the pot support body 210 is the junction between the top surface of the pot support body 210 and the inner side surface 210b of the pot support body 210.

[0090] It should be noted that the convex top of the near-fire convex ring 2101c is higher than the inner edge of the pot rack body 210, so that the near-fire convex ring 2101c can block the outward-flowing smoke and increase the residence time of the smoke in the combustion space. In addition, the near-fire convex ring 2101c can prevent the heat of the smoke from radiating outward, thereby improving the heat exchange efficiency between the smoke and the pot; the energy-gathering sink 2101b is a groove-shaped structure formed on the top plate 2101 of the pot rack body 210, and the notch of the energy-gathering sink 2101b faces upward. In the process of smoke being discharged from the combustion space, the smoke passes over the near-fire convex ring 2101c and flows to the energy-gathering sink When the flue gas reaches the trough 2101b, the flue gas first flows downward to the bottom of the energy-gathering trough 2101b, and then climbs upward out of the energy-gathering trough 2101b, so that the flue gas makes more circuitous flows during the flow process, and thus makes it easier for the flue gas to form vortices during the flow process, which can enhance the disturbance of the flue gas in the combustion space, so that the flue gas can stay in the combustion space for a longer time, thereby further improving the heat exchange efficiency between the flue gas and the cookware, and making full use of the heat energy carried by the flue gas; in addition, the energy-gathering trough 2101b can also be used to accommodate liquid overflowing from the cookware to prevent the liquid from flowing to the fire hole of the burner 100 and clogging the fire hole.

[0091] Furthermore, the energy-gathering trough 2101b is formed by a partially integral depression in the pot support body 210, making its formation more convenient and increasing the overall structural strength of the pot support body 210. The energy-gathering trough 2101b extends along the circumference of the pot support body 210, so that energy-gathering troughs 2101b are provided at multiple locations along the circumference of the pot support body 210. This allows flue gas flowing in multiple directions to pass through the energy-gathering trough 2101b before being discharged, further enhancing the disturbance of the flue gas within the combustion space, allowing the flue gas to remain within the combustion space longer, thereby further improving the heat exchange efficiency between the flue gas and the cookware. Among them, the energy-gathering trough 2101b can extend continuously along the circumference of the pot support body 210, making the forming of the energy-gathering trough 2101b simpler and more convenient; or, the energy-gathering trough 2101b can also extend discontinuously along the circumference of the pot support body 210, and the energy-gathering trough 2101b includes multiple sections of trough parts arranged at intervals along the circumference of the pot support body 210, so that the energy-gathering trough 2101b can be set at multiple positions of the pot support body 210 on the basis of keeping the total length of the energy-gathering trough 2101b unchanged.

[0092] Specifically, the energy-gathering sink 2101b extends along the circumference of the pot rack body 210, so that the smoke flowing in all directions can pass through the energy-gathering sink 2101b before being discharged, which can further improve the heat exchange efficiency between the smoke and the pot.

[0093] In some embodiments, the outer edge of the guide surface 2101a is the edge of the guide surface 2101a on the side away from the central through hole 210a. When the cookware is placed on the pot support 220, the pot support 220 separates the cookware from the guide surface 2101a. An exhaust flow channel for smoke exhaust is formed between the guide surface 2101a and the bottom surface of the cookware. The guide surface 2101a can guide the smoke to be discharged outward. When the smoke is discharged outward from the combustion space, it can continue to flow upward along the guide surface 2101a, which can further increase the impact strength of the smoke on the bottom surface of the cookware, improve the heat exchange efficiency between the smoke and the cookware, and further improve the combustion efficiency of the stove 1000.

[0094] It can be understood that there is a distance between the guide surface 2101a and the bottom surface of the cookware, and if the distance between the outer edge of the guide surface 2101a and the cookware is too small, the size of the exhaust duct will be too small, which may cause the smoke to be unable to be discharged smoothly from the combustion space; if the distance between the outer edge of the guide surface 2101a and the cookware is too large, the size of the exhaust duct will be too large, and the smoke in the combustion space will be quickly discharged from the air outlet of the exhaust duct, which will reduce the heat exchange efficiency between the smoke and the cookware, and the heat energy carried by the smoke cannot be fully utilized.

[0095] Therefore, there is a distance between the guide surface 2101a and the bottom surface of the cookware, and the distance between the guide surface 2101a and the bottom surface of the cookware is relatively small. On the basis of ensuring that the smoke can be discharged smoothly through the exhaust flow channel, the exhaust flow channel can be narrowed, so that the flow rate of the smoke when discharged through the exhaust flow channel is faster, so as to increase the flow rate of the high-temperature smoke in the combustion space, thereby increasing the contact probability of the high-temperature smoke and the bottom surface of the cookware, so that the high-temperature smoke has a higher probability of contacting and exchanging heat with the bottom surface of the cookware, thereby improving the heat exchange efficiency between the smoke and the cookware, making full use of the heat energy carried by the smoke, and further improving the combustion efficiency of the stove 1000.

[0096] In some embodiments, the guide surface 2101 a extends obliquely downward from the outer edge of the pot support body 210 toward the inner edge of the pot support body 210 . It can be understood that in this embodiment, the outer edge of the guide surface 2101a coincides with the outer edge of the pot support body 210, and the guide surface 2101a extends obliquely from the outer edge of the pot support body 210 toward the inner side of the pot support body 210 to the inner edge of the guide surface 2101a. The guide surface 2101a can better guide the smoke to flow upward from the inner edge of the guide surface 2101a to the outer edge of the guide surface 2101a, thereby increasing the impact intensity of the smoke on the bottom surface of the cookware, thereby further improving the heat exchange efficiency between the smoke and the cookware. In addition, the inclined guide surface 2101a can play a certain blocking role for the smoke. When the smoke flow hits the guide surface 2101a, it is easy to swirl and form a vortex, which can increase the disturbance of the high-temperature smoke in the combustion space, thereby allowing the high-temperature smoke to stay in the combustion space for a longer time, further improving the heat exchange efficiency between the smoke and the cookware, reducing the heat energy loss of the smoke, and thereby improving the thermal efficiency of the stove 1000.

[0097] In one embodiment, the guide surface 2101a extends from the outer edge of the pot support body 210 to the inner edge of the pot support body 210; it can be understood that in this embodiment, the inner edge of the guide surface 2101a coincides with the inner edge of the pot support body 210, which can extend the radial length of the guide surface 2101a along the pot support body 210, so that the guide surface 2101a has a sufficient length, thereby extending the length of the exhaust flow channel, so that the smoke can be discharged smoothly through the exhaust flow channel.

[0098] It should be noted that, in one embodiment, the flow guide surface 2101a may be an inclined surface; of course, in other embodiments, the flow guide surface 2101a may also be a flat surface, a curved surface, a wavy surface, a serrated surface, or other shapes. In one embodiment, the flow guide surface 2101a may completely coincide with the top surface of the pot support body 210, that is, the top surface of the pot support body 210 serves as the flow guide surface 2101a. In other embodiments, the flow guide surface 2101a may be formed by only a portion of the top surface of the pot support body 210. In one embodiment, the flow guide surface 2101a may be a surface that continuously extends radially along the pot support body 210; in other embodiments, the flow guide surface 2101a may be formed by multiple segments of surfaces spaced apart radially along the pot support body 210.

[0099] In some embodiments, the guide surface 2101a extends along the circumference of the pot support body 210, such that the guide surface 2101a is provided at multiple locations along the circumference of the pot support body 210. This allows smoke flowing in multiple directions to be guided through the guide surface 2101a before being discharged, thereby further increasing the probability of smoke contact with the bottom surface of the cookware, thereby improving the heat exchange efficiency between the smoke and the cookware and fully utilizing the heat energy carried by the smoke. The guide surface 2101a can extend continuously along the circumference of the pot support body 210, making it easier to form the guide surface 2101a. Alternatively, the guide surface 2101a can extend discontinuously along the circumference of the pot support body 210, comprising multiple guide surface segments spaced apart along the circumference of the pot support body 210. This allows the guide surface 2101a to be provided at multiple locations on the pot support body 210 while maintaining its total length.

[0100] Specifically, the guide surface 2101a extends along the circumference of the pot rack body 210, so that the smoke flowing in all directions can pass through the guide surface 2101a before being discharged, which can further improve the heat exchange efficiency between the smoke and the pot, and thus improve the thermal efficiency of the stove 1000.

[0101] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0102] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A burner, characterized in that: include: The inner combustion part has an inner fire hole on the top; An outer combustion part is arranged around the outer side of the inner combustion part, an air passage is formed between the outer combustion part and the inner combustion part, and an outer fire hole is provided on the top of the outer combustion part; an air blowing device, connected to the air passage and used to blow secondary air into the air passage; as well as The guide structure is arranged in an annular shape and is arranged on the top of the air passage. The guide structure is used to guide the secondary air entering the air passage to the inner fire hole and the outer fire hole respectively.

2. The burner according to claim 1, wherein The inner combustion part includes an inner ring fire cover, the inner ring fire cover has a plurality of inner fire holes, and the outer combustion part includes an outer ring fire cover, the outer ring fire cover has a plurality of outer fire holes; The guide structure is spaced apart from the inner ring fire cover and forms a first guide channel, and the guide structure is spaced apart from the outer ring fire cover and forms a second guide channel; The first guide channel and the second guide channel are both communicated with the air passage, and are used to guide the secondary air introduced into the air passage to the inner fire hole and the outer fire hole respectively.

3. The burner according to claim 2, characterized in that The guide structure includes a first guide plate, a connecting plate, and a second guide plate sequentially connected in a direction from the inner combustion portion to the outer combustion portion, the first guide plate extending toward the inner ring fire cover, the second guide plate extending above the outer ring fire cover, the first guide plate and the inner ring fire cover defining a first guide channel, and the second guide plate and the outer ring fire cover defining a second guide channel; Wherein, the first guide plate is perpendicular to the normal direction of the inner fire hole located on the outer side of the inner ring fire cover; The lower surface of the second guide plate is parallel to the inner portion of the upper surface of the outer ring fire cover.

4. The burner according to claim 3, characterized in that The distance between the lower surface of the second guide plate and the upper surface of the outer ring fire cover is 1 mm to 2 mm.

5. The burner according to claim 3, wherein Along the up-down direction of the burner, one end of the first guide plate away from the connecting plate is lower than the inner fire hole on the inner ring fire cover.

6. The burner according to claim 3, wherein Projected along the axial direction of the burner, the projection of the second guide plate on the burner does not cover the outer fire hole of the outer ring fire cover; The distance between the projection of the second guide plate and the projection of the outer fire hole on the inner ring of the outer ring fire cover is 0.5 mm to 2 mm.

7. The burner according to claim 2, wherein It also includes a connecting spoke, wherein the connecting spoke is provided in the air passage, and two ends of the connecting spoke are respectively connected to the inner combustion part and the outer combustion part; The flow-guiding structure is overlapped on the connecting spokes.

8. The burner according to claim 2, wherein: The flow guide structure includes a plurality of diverter plates, which are spaced apart and arranged above the air passage to guide the secondary air to the inner combustion part and the outer combustion part respectively.

9. The burner according to any one of claims 2 to 8, characterized in that The air blowing device includes a blower and an air duct member, the air duct member includes an air supply pipe and an annular air duct plate, the annular air duct plate is sealed at the bottom of the inner combustion part and the outer combustion part, and has an air supply channel formed therein, the air supply channel is connected to the air passage; The air supply pipe is connected to the air outlet of the fan and the air supply channel.

10. The burner according to claim 9, characterized in that The annular air duct plate includes an inner annular wall, an annular bottom wall and an outer annular wall which are connected in sequence from the inner combustion part to the outer combustion part. The inner annular wall is sealed against the bottom of the inner combustion part, and the outer annular wall is sealed against the bottom of the outer combustion part.

11. The burner according to claim 9, wherein The flow guide structure is detachably connected to the air duct component.

12. The burner according to claim 11, wherein It also includes a connecting column, which extends in the air passage. One end of the connecting column is connected to the flow guide structure, and the other end is detachably connected to the air duct component via a connecting component.

13. A stove, characterized in that: include: A burner according to any one of claims 1 to 12; as well as The pot support is arranged in a ring shape and is arranged outside the burner.

14. The cooker according to claim 13, wherein: The pot support includes a pot support body, the pot support body having a central through hole for mounting the burner, the pot support body having an inner side surface arranged toward the central through hole, a distance between the inner side surface and the projection of the outer surface of the burner in the vertical direction of the cooker, and the distance between the projection of the inner side surface and the outer surface of the burner is 0.5 mm to 3 mm.

15. The cooker according to claim 14, characterized in that: A heat-insulating cavity is formed in the pot support body and is arranged around the burner.

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