Multi-ring burner and gas stove

Abstract

This invention belongs to the field of combustion technology, specifically disclosing a multi-ring burner and a gas stove. The multi-ring burner includes a burner cap and a burner head assembly. The burner cap assembly includes an inner ring burner cap, a middle ring burner cap, and an outer ring burner cap; the burner head assembly cooperates with the burner cap assembly to form an inner ring gas supply channel for supplying gas to the inner ring burner holes, a middle ring gas supply channel for supplying gas to the middle ring burner holes, and an outer ring gas supply channel for supplying gas to the outer ring burner holes; a first ignition slit is radially provided at the upper end of the middle ring burner cap; the multi-ring burner has an ignition channel, which is separated from the middle ring gas supply channel and the middle ring burner holes; the outlet end of the ignition channel extends into the middle ring gas supply channel and communicates with the first ignition slit; the inlet end of the ignition channel communicates with either the inner ring gas supply channel or the outer ring gas supply channel. This invention enables cross-regional flame transfer between the inner and outer ring burner caps, improving the flexibility of firepower adjustment and ease of use of the multi-ring burner and gas stove.

Description

Technical Field

[0001] This invention relates to the field of combustion technology, and in particular to a multi-ring burner and a gas stove. Background Technology

[0002] Gas stoves are common kitchen appliances that heat cooking utensils by igniting and burning gas. To meet the demand for greater firepower, some existing gas stoves have multi-ring flame combustion function.

[0003] The prior art provides a multi-ring burner, which includes a burner head, a gas distribution seat, and a burner cap assembly arranged sequentially from top to bottom. The burner cap assembly includes an inner ring burner cap, a middle ring burner cap, and an outer ring burner cap arranged sequentially from the inside to the outside. Each of the inner, middle, and outer ring burner caps is provided with a gas chamber and a flame hole. The burner head supplies mixed gas to the flame holes of the three burner caps through the gas distribution seat. To achieve ignition and combustion of the burner, an ignition needle is provided between the inner and middle ring burner caps. A first ignition slit is provided on the middle ring burner cap, and a second ignition slit is provided on the outer ring burner cap. When the ignition needle is ignited, the gas flowing out of the inner and middle ring burner holes is ignited, and the flame on the middle ring burner cap is guided to the outer ring burner hole through the first and second ignition slits.

[0004] While existing multi-ring burners can increase the flame coverage and intensity adjustment range, the flame can only be transmitted from the middle ring burner to the outer ring burner. This means that when increasing the flame intensity, the flame intensity can only be increased sequentially from the inner ring burner to the middle ring burner and then to the outer ring burner. When decreasing the flame intensity, the flame intensity can only be decreased gradually from the outer ring burner to the middle ring burner and then back to the inner ring burner. This results in poor flexibility in flame intensity adjustment. Summary of the Invention

[0005] One of the technical problems solved by this invention is to provide a multi-ring burner that can effectively solve the problem of poor firepower adjustment flexibility of existing multi-ring burners, improve the firepower adjustment flexibility of multi-ring burners, and improve the usage flexibility of multi-ring burners.

[0006] The second technical problem solved by this invention is to provide a gas stove that can effectively solve the problem of poor firepower adjustment flexibility in existing gas stoves, improve the firepower adjustment flexibility of multi-ring burners, and improve the usability of the gas stove.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A multi-ring burner includes a burner head assembly and a burner cap assembly mounted on the upper end of the burner head assembly. The burner cap assembly includes an inner ring burner cap, a middle ring burner cap, and an outer ring burner cap spaced apart from the inside to the outside. The inner ring burner cap has an inner ring burner hole, the middle ring burner cap has a middle ring burner hole, and the outer ring burner cap has an outer ring burner hole.

[0009] The burner head assembly and the burner cap assembly cooperate to form an inner ring gas supply channel for supplying gas to the inner ring burner holes, a middle ring gas supply channel for supplying gas to the middle ring burner holes, and an outer ring gas supply channel for supplying gas to the outer ring burner holes.

[0010] The upper end of the middle ring burner is provided with a first ignition slit in the radial direction. The multi-ring burner has an ignition channel. The ignition channel is separated from the middle ring gas supply channel and the middle ring flame hole. The outlet end of the ignition channel extends into the middle ring gas supply channel and communicates with the first ignition slit. The inlet end of the ignition channel communicates with the inner ring gas supply channel or the outer ring gas supply channel.

[0011] The multi-ring burner of this invention, compared with the prior art, has the following advantages: by setting an inner ring burner cap, a middle ring burner cap, and an outer ring burner cap, it can meet the combustion requirements of multi-ring fire, increase the maximum heat load of the multi-ring burner, and increase the firepower adjustment range; by setting an ignition channel separated from the middle ring gas supply channel, when the inner ring gas supply channel supplies gas to the inner ring burner hole and the outer ring gas supply channel supplies gas to the outer ring burner hole, part of the gas mixture of gas and air in the inner ring gas supply channel or the outer ring gas supply channel enters the ignition channel and flows upward through the first ignition slit. At this time, if the outer ring... When the gas in one of the inner ring flame holes is ignited, the flame will burn along the first ignition seam and be guided to the other of the outer and inner ring flame holes. This ignites the gas in the outer or inner ring flame holes that are far from the ignition needle, so that flames burn simultaneously in both the inner and outer ring flame caps. This achieves flame conduction across the flame caps, enabling combustion of both the inner and outer flames of the burner even when there is no gas supply or flame combustion in the middle ring flame cap. This better satisfies the need for flexible adjustment of firepower and flame range, improves the flexibility of firepower adjustment, and enhances the overall flexibility of burner operation.

[0012] In one embodiment, the middle ring flame cap has a middle ring gas cavity communicating with the middle ring flame hole. The middle ring gas cavity forms the gas outlet end of the middle ring gas supply channel. The ignition channel includes an ignition gas outlet channel, which is located inside the middle ring gas cavity and separated from the middle ring gas cavity. The ignition gas outlet channel is vertically connected to the first ignition seam.

[0013] In one embodiment, the ignition channel further includes an ignition air intake channel, which is disposed in the burner assembly;

[0014] The inner ring gas supply channel includes an inner ring gas channel located within the burner assembly, and the outer ring gas supply channel includes an outer ring gas channel located within the burner assembly. The inlet end of the ignition gas inlet channel is connected to either the inner ring gas channel or the outer ring gas channel, and the outlet end of the ignition gas inlet channel is connected to the ignition gas outlet channel.

[0015] In one embodiment, the central ring gas supply channel includes a central ring premixing chamber formed on the upper end of the burner assembly. The central ring premixing chamber is open and communicates directly with the central ring gas chamber. The outlet end of the ignition gas inlet channel extends upward into the interior of the central ring premixing chamber and is separated from the central ring premixing chamber. The outlet end of the ignition gas inlet channel and the ignition gas outlet channel are vertically connected and communicate directly with each other.

[0016] In one embodiment, the top wall of the middle annular gas chamber is provided with an upper partition that protrudes downward, and the upper partition and the cavity wall of the middle annular gas chamber enclose the ignition gas outlet channel.

[0017] The bottom of the middle ring premixing chamber is provided with a lower partition, which is formed by the lower partition and the cavity wall of the middle ring premixing chamber. The cavity forms the outlet channel of the ignition intake channel. The upper partition and the lower partition are directly opposite each other.

[0018] In one embodiment, the ignition intake channel includes a vertical channel section and a horizontal channel section. The vertical channel section extends vertically and its upper end extends into the middle ring premixing chamber. The horizontal channel section is connected to the lower end of the vertical channel section and extends horizontally through the outer wall of the burner assembly. The horizontal channel section is connected to the outer ring gas channel or the inner ring gas channel.

[0019] The multi-ring burner includes a plug that seals the port of the transverse channel section.

[0020] In one embodiment, the burner assembly has a top plate and a middle ring cavity mounted above the top plate. The middle ring cavity has a middle ring premixing chamber. The inlet ends of the outer ring gas supply channel, the inner ring gas supply channel, and the middle ring gas supply channel are all located below the top plate, and the outlet ends are all located above the top plate.

[0021] A vertical air intake section is connected between the bottom of the central ring cavity and the top plate, and a vertical channel section is provided inside the vertical air intake section. A horizontal air intake section is provided on the lower side of the top plate, and a horizontal channel section is provided inside the horizontal air intake section.

[0022] In one embodiment, the middle ring flame cap is provided with a first ignition hole, the first end of the first ignition hole penetrates the inner sidewall of the middle ring flame cap, the second end of the first ignition hole is connected to the ignition channel, and the first ignition hole is separated from the middle ring gas chamber.

[0023] And / or, the middle ring flame cap is provided with a second ignition hole, the first end of the second ignition hole is connected to the ignition channel, the second end of the second ignition hole penetrates the outer wall of the middle ring flame cap, and the second ignition hole is separated from the middle ring gas chamber.

[0024] In one embodiment, the outer ring fire hole is disposed on the outer perimeter wall of the outer ring fire cover, and the upper end surface of the outer ring fire cover is provided with an outer ring ignition slit, the first end of the outer ring ignition slit penetrating the inner perimeter wall of the outer ring fire cover and the second end extending to the outer ring fire hole.

[0025] The outer ring gas supply channel includes an outer ring gas cavity located inside the outer ring flame cap. The outer ring ignition slit and the outer ring flame hole are both connected to the outer ring gas cavity. The outer ring ignition slit and the first ignition slit are arranged opposite each other in the radial direction of the flame cap assembly.

[0026] In one embodiment, the burner assembly is provided with a central ring positioning structure, and the central ring burner cap is provided with a first mating structure. The central ring positioning structure and the first mating structure cooperate to position the central ring burner cap in the circumferential direction of the burner assembly.

[0027] The burner assembly is provided with an outer ring positioning structure, and the outer ring flame cover is provided with a second mating structure. The outer ring positioning structure and the second mating structure cooperate to position the outer ring flame cover in the circumferential direction of the burner assembly.

[0028] The second technical problem mentioned above is solved by the following technical solution:

[0029] A gas stove, comprising a multi-ring burner as described above.

[0030] The gas stove described in this invention has the following advantages compared with the prior art: by adopting the above-mentioned burner, the flexibility of firepower adjustment can be improved, and the flexibility and reliability of the burner in use can be improved. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a multi-ring burner provided in an embodiment of the present invention;

[0032] Figure 2 This is a cross-sectional view of a multi-ring burner provided in an embodiment of the present invention.

[0033] Figure 3 for Figure 2 A magnified view of a section at point I;

[0034] Figure 4 This is a schematic diagram of the structure of the middle ring flame cap provided in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the disassembled structure of a burner assembly according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of a multi-ring burner provided in an embodiment of the present invention from another perspective.

[0037] Figure 7 This is a cross-sectional view of a multi-ring burner provided in one embodiment of the present invention, taken from another section.

[0038] Figure 8 for Figure 7 A magnified view of a section at point J;

[0039] Figure 9 A cross-sectional view of a multi-ring burner provided in another embodiment of the present invention;

[0040] Figure 10 A schematic diagram of the furnace base provided in another embodiment of the present invention;

[0041] Figure 11 This is a schematic diagram of the structure of a flame cap assembly provided in another embodiment of the present invention;

[0042] Figure 12 for Figure 11 A magnified view of the area at point K.

[0043] Label Explanation:

[0044] 1. Flame cap assembly; 11. Inner ring flame cap; 111. Inner ring gas chamber; 112. Inner ring flame hole; 12. Middle ring flame cap; 121. Inner wall of middle ring; 122. Outer wall of middle ring; 123. Top wall of middle ring; 124. Positioning ring of middle ring; 125. Middle ring gas chamber; 126. Flame hole of middle ring; 127. Ignition gas passage; 128. Upper partition; 129. First ignition slit; 120. Second ignition slit; 1201. First ignition hole; 1202. Second ignition hole; 1203. First mating structure; 13. Outer ring flame cap; 131. Inner wall of outer ring; 132. Outer wall of outer ring; 133. Top wall of outer ring; 134. Positioning ring of outer ring; 135. Outer ring gas chamber; 136. Flame hole of outer ring; 137. Ignition slit of outer ring; 138. Second mating structure;

[0045] 2. Burner head assembly; 21. Burner base; 211. Top plate; 212. Central sleeve; 2121. Inner ring premixing chamber; 213. Middle ring cavity; 2131. Middle ring premixing chamber; 214. Outer ring cavity; 2141. Outer ring premixing chamber; 215. Connecting pipe section; 216. Central vent pipe section; 2161. Inner ring venting channel; 217. Middle ring vent section; 2171. Middle ring venting channel; 218. Outer ring vent section; 2181. Outer ring venting channel; 219. Middle ring positioning structure; 210. Outer ring positioning structure; 22. Injector tube; 22a. Inner ring ejector tube; 22a1. Inner ring ejector channel; 22b. Middle ring ejector tube; 22b1. Middle ring ejector channel; 22c. Outer ring ejector tube; 22c1. Outer ring ejector channel; 23. Inner ring gas passage; 24. Middle ring gas passage; 25. Outer ring gas passage; 26. Gas intake structure; 261. Lower partition; 262. Vertical gas intake section; 263. Horizontal gas intake section; 264. Ignition intake channel; 2641. Horizontal channel section; 2642. Vertical extension channel section; 2643. Outer channel section; 265. Outer extension section;

[0046] 3. Plug; 4. Ignition needle; 5. Thermocouple. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] This invention provides a gas stove that can increase the range and flexibility of the burner's firepower adjustment, thereby improving the flexibility and user experience of the burner and the gas stove.

[0052] like Figure 1 and Figure 2 As shown, the gas stove includes a cooktop, a multi-ring burner, a controller, and a gas supply assembly. The cooktop includes a cooktop panel and a base, which together form an installation space. The multi-ring burner includes a burner head assembly 2 and a burner cap assembly 1 installed on the upper end of the burner head assembly 2. The burner cap assembly 1 is exposed above the cooktop panel to heat the cooking appliances. The burner head assembly 2 is installed within the installation space and is used to supply gas to the burner cap assembly 1. The gas supply assembly is used to supply gas to the burner head assembly 2 and is communicatively connected to the controller so that the controller controls the gas supply of the gas supply assembly.

[0053] In this embodiment, the flame cap assembly 1 includes an inner ring flame cap 11, a middle ring flame cap 12 and an outer ring flame cap 13 spaced apart from the inside to the outside. The inner ring flame cap 11 has an inner ring flame hole 112, the middle ring flame cap 12 has a middle ring flame hole 126 and the outer ring flame cap 13 has an outer ring flame hole 136. The burner head assembly 2 and the burner cap assembly 1 cooperate to form an inner ring gas supply channel for supplying gas to the inner ring burner holes 112, a middle ring gas supply channel for supplying gas to the middle ring burner holes 126, and an outer ring gas supply channel for supplying gas to the outer ring burner holes 136; the upper end of the middle ring burner cap 12 is provided with a first ignition slit 129 through it in the radial direction; the multi-ring burner has an ignition channel; the ignition channel is separated from the middle ring gas supply channel and the middle ring burner holes 126 on the middle ring burner cap 12; the gas outlet end of the ignition channel extends into the middle ring gas supply channel and communicates with the first ignition slit 129; the gas inlet end of the ignition channel is connected to the inner ring gas supply channel or the outer ring gas supply channel.

[0054] The burner provided in this embodiment, by setting an inner ring burner cap 11, a middle ring burner cap 12, and an outer ring burner cap 13, can meet the combustion requirements of multi-ring flames, increase the maximum heat load of the multi-ring burner, and increase the flame adjustment range. By setting an ignition channel separate from the middle ring gas supply channel, when the inner ring gas supply channel supplies gas to the inner ring burner hole 112 and the outer ring gas supply channel supplies gas to the outer ring burner hole 136, part of the gas mixture of gas and air in the inner ring gas supply channel or the outer ring gas supply channel will enter the ignition channel and flow upward through the first ignition slit 129. At this time, if the gas in one of the inner ring burner holes 112 in the outer ring burner hole 136 is ignited, the combustion gas will be ignited. When the gas is ignited, the flame will burn along the first ignition seam 129 and be guided to another location between the outer ring flame hole 136 and the inner ring flame hole 112. This ignites the gas at the outer ring flame hole 136 or the inner ring flame hole 112, which is far from the ignition needle 4. This allows flames to burn simultaneously at the inner ring burner cap 11 and the outer ring burner cap 13, enabling flame conduction across the burner caps. This allows for combustion of both the inner and outer flames of the burner even when there is no gas supply or flame combustion at the middle ring burner cap 12. This better satisfies the need for flexible adjustment of firepower and flame range, improves the firepower adjustment flexibility of the burner and the gas stove, and enhances the usability of the burner and the gas stove.

[0055] In one embodiment, the gas supply assembly includes a first gas valve and a second gas valve. The first gas valve has two first gas outlets, which are respectively connected to an inner ring gas supply channel and a middle ring gas supply channel. The first gas valve controls the gas flow and on / off of the two first gas outlets. The second gas valve has two second gas outlets, which are respectively connected to an inner ring gas supply channel and an outer ring gas supply channel. The second gas valve controls the gas flow and on / off of the two second gas outlets. Both the first and second gas valves are communicatively connected to a controller.

[0056] The above configuration ensures that gas is supplied to the inner ring gas supply channel regardless of whether the first or second gas valve is open, meaning that a flame will burn at the inner ring burner hole 112. This allows the multi-ring burner to have a central flame and an outer ring hole when the first and / or second gas valves are open, improving the uniformity of heating the cooking appliances and enhancing the user experience of the gas stove. At the same time, this configuration reduces the number of gas valves required, and allows the first and second gas valves to meet control requirements using conventional gas valve structures, reducing the cost of improving the gas stove.

[0057] In other embodiments, the gas stove may include a first gas valve and a second gas valve. The first gas valve has two first gas outlets, which are respectively connected to an inner ring gas supply channel and an outer ring gas supply channel. The second gas valve has only one second gas outlet, which is connected to a middle ring gas supply channel.

[0058] It is worth noting that in another embodiment, the flame cap assembly 1 includes a plurality of flame caps arranged sequentially from the inside to the outside, and the flame transfer structure described above can be used to transfer flame between two flame caps that are spaced apart by one flame cap.

[0059] In one embodiment, the gas stove further includes an ignition needle 4, the lower end of which is installed on the burner assembly 2, and the upper end of which is located between the inner ring burner cap 11 and the middle ring burner cap 12. With this configuration, when the first gas valve and the second gas valve are simultaneously open, the ignition needle 4 can ignite the mixed gas flowing out of the inner ring burner hole 112 and the middle ring burner hole 126, thereby achieving ignition and combustion of the inner ring burner cap 11 and the middle ring burner cap 12, and thus achieving simultaneous combustion at the inner ring burner cap 11, the middle ring burner cap 12, and the outer ring burner cap 13. When the first gas valve is open and the second gas valve is closed, the ignition needle 4 first ignites the mixed gas flowing out of the inner ring burner hole 112, and then the flame is guided through the first ignition slit 129 to the outer ring burner cap 13, causing the mixed gas flowing out of the outer ring burner hole 136 to be ignited. The above setup can satisfy the ignition and combustion needs of each burner cap, while only requiring one ignition needle 4, thus reducing the cost of the gas stove and minimizing the footprint of the multi-ring burner.

[0060] In another embodiment, the ignition needle 4 can be installed between the middle ring burner cap 12 and the outer ring burner cap 13. The outer ring burner cap 13 is provided with a second ignition slit 120 that is separate from the ignition channel and the first ignition slit 129. That is, when the first gas valve is opened, the gas flowing out of the outer ring burner hole 136 is first ignited by the ignition needle 4, and the flame is conducted along the first ignition slit 129 to the inner ring burner hole 112. When the second gas valve is opened, the gas at the middle ring burner hole 126 is first ignited, and then it can be conducted to the inner ring burner cap 11 through the second ignition slit 120.

[0061] The ignition needle 4 has two voltage input terminals, and both voltage output terminals are electrically connected to the controller. When the first gas valve is opened, a first set voltage is output to one of the voltage input terminals for ignition; when the second gas valve is opened, a second set voltage is input to the other voltage input terminal for ignition. The ignition principle of the ignition needle 4 can be found in existing technology and will not be elaborated here.

[0062] The gas stove also includes a thermocouple 5. The lower end of the thermocouple 5 is installed on the burner assembly 2, and the upper end is located between the inner ring burner cap 11 and the middle ring burner cap 12. The thermocouple 5 has two potential output terminals, which provide opening potentials to the first gas valve and the second gas valve respectively, and can also provide opening electromotive force to the first gas valve and the second gas valve simultaneously. The structure of the thermocouple 5 and the structure and principle by which the thermocouple 5 provides opening potentials to the gas valves can be set with reference to existing technology, and this embodiment does not limit or elaborate on them.

[0063] The inner ring gas supply channel includes an inner ring gas cavity 111 formed within the inner ring burner cap 11 and an inner ring gas passage 23 formed on the burner assembly 2. The inner ring gas cavity 111 is open at the bottom and communicates with the upper port of the inner ring gas passage 23. The inner ring burner hole 112 communicates with the inner ring gas cavity 111. The middle ring gas supply channel includes a middle ring gas cavity 125 formed within the middle ring burner cap 12 and a middle ring gas passage 24 formed on the burner assembly 2. The middle ring gas cavity 125 is open at the bottom and communicates with the upper port of the middle ring gas passage 24. The middle ring burner hole 126 communicates with the middle ring gas cavity 125. The outer ring gas supply channel includes an outer ring gas cavity 135 formed within the outer ring burner cap 13 and an outer ring gas passage 25 formed on the burner assembly 2. The outer ring gas cavity 135 is open at the bottom and communicates with the upper port of the outer ring gas passage 25. The outer ring burner hole 136 communicates with the outer ring gas cavity 135. That is, the inner ring air chamber 111 forms the air outlet of the inner ring air supply channel, the middle ring air chamber 125 forms the air outlet of the middle ring air supply channel, and the outer ring air chamber 135 forms the air outlet of the outer ring air supply channel.

[0064] like Figure 2 and Figure 3 As shown, in one embodiment, the ignition channel includes an ignition gas outlet channel 127, which is located inside and separated from the middle ring gas cavity 125. The ignition gas outlet channel 127 is vertically aligned with and communicates with the first ignition seam 129. This arrangement facilitates communication between the ignition channel and the first ignition seam 129, thereby simplifying the structure of the middle ring flame cap 12 and reducing the processing difficulty of the middle ring flame cap 12.

[0065] In one embodiment, the ignition channel further includes an ignition air intake channel 264, which is disposed on the burner head assembly 2. The air intake end of the ignition air intake channel 264 is connected to the inner ring gas channel 23 or the outer ring gas channel 25, and the air outlet end of the ignition air intake channel 264 is connected to the ignition air outlet channel 127. Disposing of the ignition air intake channel 264 on the burner head assembly 2 simplifies the structure of the burner cap assembly 1, allowing the inner ring burner cap 11, the middle ring burner cap 12, and the outer ring burner cap 13 in the burner cap assembly 1 to be separated, reducing the processing difficulty and cost of the burner cap assembly 1, and also reducing the size of the burner cap assembly 1.

[0066] In other embodiments, an ignition intake channel 264 may be provided on the burner cap assembly 1. For example, a connecting bridge is provided between the outer ring burner cap 13 and the inner ring burner cap 11, and an ignition intake channel 264 is provided on the connecting bridge. The ignition intake channel 264 is connected to the outer ring gas chamber 135 or the outer ring gas passage 25.

[0067] In one embodiment, the central ring flame hole 126 is disposed on the outer ring wall of the central ring flame cap 12. A second ignition slit 120 is provided at the upper end of the central ring flame cap 12, communicating with the central ring gas chamber 125. The first end of the second ignition slit 120 penetrates the inner ring wall of the central ring flame cap 12, and the second end extends to the central ring flame hole 126. The second ignition slit 120 and the first ignition slit 129 are spaced apart circumferentially from each other on the central ring flame cap 12. By disposing of the central ring flame hole 126 on the outer ring wall of the central ring flame cap 12, when the first gas valve is opened, the flame formed at the central ring flame cap 12 can be positioned outwards to heat the outer bottom of the cooking appliance. Furthermore, it better avoids interference between the flame at the inner ring flame hole 112 and the flame at the central ring flame cap 12, improving combustion stability.

[0068] In one embodiment, the first ignition seam 129 and the second ignition seam 120 are at an angle greater than 90° around the middle ring fire cap 12 to increase the distance between the first ignition seam 129 and the second ignition seam 120 and ensure the reliability of ignition transmission.

[0069] In one embodiment, a first ignition hole 1201 is provided on the middle ring flame cap 12. The first end of the first ignition hole 1201 penetrates the inner wall of the middle ring flame cap 12, and the second end of the first ignition hole 1201 communicates with the ignition gas outlet channel 127. The first ignition hole 1201 is separated from the middle ring gas chamber 125. And / or, a second ignition hole 1202 is provided on the middle ring flame cap 12. The first end of the second ignition hole 1202 communicates with the ignition gas outlet channel 127, and the second end of the second ignition hole 1202 penetrates the outer wall of the middle ring flame cap 12. The second ignition hole 1202 is separated from the middle ring gas chamber 125. By providing the first ignition hole 1201, the conduction of flame between the inner ring flame hole 112 and the first ignition slot 129 is more facilitated. By providing the second ignition hole 1202, the conduction of flame between the outer ring flame hole 136 and the first ignition slot 129 is more facilitated, thereby improving the stability and reliability of flame conduction.

[0070] The diameters of both the first ignition hole 1201 and the second ignition hole 1202 are larger than the width of the first ignition slot 129. Furthermore, both the first ignition hole 1201 and the second ignition hole 1202 extend downward at an angle toward the ignition outlet passage 127 to facilitate the flow of gas through the ignition outlet passage 127 to the first ignition hole and the second ignition hole 1202.

[0071] In one embodiment, the inner ring gas passage 23 includes a connected inner ring ejector passage 22a1 and an inner ring premixing chamber 2121; the middle ring gas passage 24 includes a connected middle ring ejector passage 22b1 and a middle ring premixing chamber 2131; and the outer ring gas passage 25 includes an outer ring ejector passage 22c1 and an outer ring premixing chamber 2141. The inner ring premixing chamber 2121, the middle ring premixing chamber 2131, and the outer ring premixing chamber 2141 are arranged sequentially from the inside to the outside at the upper end of the burner assembly 2. The inner ring premixing chamber 2121 is vertically connected to the inner ring gas chamber 111, the middle ring gas chamber 125 is vertically connected to the middle ring premixing chamber 2131, and the outer ring gas chamber 135 is vertically connected to the outer ring premixing chamber 2141. This arrangement facilitates the connection between the gas chambers of the burner caps and the corresponding gas passages, improving the uniformity of gas supply to each burner cap. Specifically, the inner ring air chamber 111 and the inner ring premixing chamber 2121 are cylindrical cavities, while the middle ring air chamber 125, the middle ring premixing chamber 2131, the outer ring air chamber 135, and the outer ring premixing chamber 2141 are annular cavities.

[0072] The inner ring ejector channel 22a1, the middle ring ejector channel 22b1, and the outer ring ejector channel 22c1 are arranged side by side and horizontally to facilitate the supply of air from the air supply assembly to each ejector channel. The outlet of the inner ring ejector channel 22a1 is connected to the inner ring premixing chamber 2121 through the inner ring ventilation channel 2161, the middle ring ejector channel 22b1 is connected to the middle ring premixing chamber 2131 through the middle ring ventilation channel 2171, and the outer ring ejector channel 22c1 is connected through the outer ring ventilation channel 2181.

[0073] In one embodiment, the outlet end of the ignition inlet channel 264 extends upward into the interior of the middle ring premixing chamber 2131 and is separated from the middle ring premixing chamber 2131. The outlet end of the ignition inlet channel 264 and the ignition outlet channel 127 are vertically aligned and connected. This arrangement facilitates the connection between the ignition inlet channel 264 and the ignition outlet channel 127, reducing the difficulty of setting up the ignition channel.

[0074] like Figures 2 to 4As shown, to improve the ease of setting up the ignition exhaust channel 127 and the ignition intake channel 264, in one embodiment, an upper partition 128 protrudes downward from the upper cavity wall of the middle ring gas chamber 125. The upper partition 128 and the inner or outer cavity wall of the middle ring gas chamber 125 enclose each other to form the ignition exhaust channel 127. The burner assembly 2 is provided with an ignition structure 26, which includes a lower partition 261 protruding from the bottom of the middle ring premixing chamber 2131. The lower partition 261 and the corresponding side cavity wall of the middle ring premixing chamber 2131 enclose each other to form a cavity, which forms the outlet channel 2643 of the ignition intake channel 2644. The upper partition 128 and the lower partition 261 are aligned vertically to ensure that the outlet channel 2643 is aligned with and sealed to the ignition exhaust channel 127. This configuration facilitates the formation of an independent region separated from the central ring gas chamber 125 within the central ring gas chamber 125, and the formation of a space independent of the central ring premixing chamber 2131 within the central ring premixing chamber 2131. The structure is simple and easy to implement.

[0075] To further simplify the structure of the burner assembly 2, in one embodiment, the ignition intake channel 264 includes a transverse channel portion 2641 and a vertical channel portion. The upper end of the vertical channel portion extends through the top of the burner assembly 2 and communicates with the ignition exhaust channel 127. The transverse channel portion 2641 is connected to the lower end of the vertical channel portion and extends laterally through the outer wall of the burner assembly 2. The transverse channel portion 2641 communicates with the outer ring gas channel 25 or the inner ring gas channel 23. The multi-ring burner includes a plug 3, which blocks the port of the transverse intake portion 263. This allows the longitudinal channel portion to be formed by drilling holes in the burner assembly 2 from top to bottom, while the transverse intake portion 263 can be formed by drilling holes in the burner assembly 2 laterally, effectively reducing the processing difficulty of the ignition intake channel 264.

[0076] Furthermore, the upper end of the vertical channel section penetrates the bottom of the middle ring premixing chamber 2131 and extends upward to the inner side of the upper partition 128. That is, the vertical channel section includes an outlet channel section 2643 located within the middle ring premixing chamber 2131 and a vertically extending channel section 2642 located below the middle ring premixing chamber 2131. The lower end of the vertical channel section communicates with the transverse channel section 2641, and the transverse channel section 2641 communicates with the inner ring gas passage 23 or the outer ring gas passage 25. This arrangement ensures that the position where the transverse channel section 2641 connects with the inner ring gas passage 23 or the outer ring gas passage 25 is located below the inner ring premixing chamber 2121 or the outer ring premixing chamber 2141. This facilitates the opening of the ignition intake channel 264 and avoids the arrangement of the ignition intake channel 264 from affecting the installation of the inner ring burner cap 11 or the outer ring burner cap 13 on the burner assembly 2. Specifically, the transverse air intake section 263 is connected to the inner ring ventilation channel 2161 or the outer ring ventilation channel 2181.

[0077] In other embodiments, the ignition intake passage 264 may not include a vertically extending passage, that is, the transverse passage portion 2641 extends radially along the burner cap assembly 1, the first end of the transverse passage portion 2641 is radially connected to the outlet passage portion 2643 along the burner cap assembly 1, and the second end of the transverse passage portion 2641 is radially connected to the inner ring premixing chamber 2121 or the outer ring premixing chamber 2141 along the burner cap assembly 1.

[0078] like Figure 5 and Figure 6 As shown, the burner assembly 2 has a top plate 211 and a middle ring cavity 213 mounted above the top plate 211. The middle ring cavity 213 has a middle ring premixing chamber 2131. The inlet ends of the outer ring gas supply channel, the inner ring gas supply channel, and the middle ring gas supply channel are all located below the top plate 211, and the outlet ends are all located above the top plate 211. A vertical air intake section 262 is connected between the bottom of the middle ring cavity 213 and the top plate 211. A vertical extension channel section 2642 of the vertical channel section is provided inside the vertical air intake section 262. A horizontal air intake section 263 is provided on the lower side of the top plate 211. A horizontal channel section 2641 is provided inside the horizontal air intake section 263. The air intake structure 26 includes the aforementioned horizontal air intake section 263 and vertical air intake section 262.

[0079] This avoids interference between the air intake structure 26 and the middle ring cavity 213 and the outer ring cavity 214, which simplifies the structural setup of the burner assembly 2. At the same time, placing the transverse air intake 263 below the top plate 211 also helps to prevent oil stains from falling onto the transverse air intake 263 during cooking, thus avoiding the problem of difficult cleaning.

[0080] Specifically, the furnace head assembly 2 includes a furnace base 21 and three ejector tubes 22, which are a middle ring ejector tube 22b, an inner ring ejector tube 22a, and an outer ring ejector tube 22c. The furnace base 21 has a top plate 211 and a central sleeve 212, a middle ring cavity 213 and an outer ring cavity 214 arranged from the inside to the outside on the upper side of the top plate 211. The furnace base 21 also includes a central vent pipe 216 connected between the inner ring ejector pipe 22a and the lower end of the central sleeve 212, a central ring vent pipe 217 connected between the middle ring ejector pipe 22b and the middle ring cavity 213, and an outer ring vent pipe 218 connected between the outer ring ejector pipe 22c and the outer ring cavity 214. The inner ring gas passage 23 runs from the inner ring ejector pipe 22a through the central vent pipe 216 to the central sleeve 212. The middle ring gas passage 24 runs from the middle ring ejector pipe 22b through the middle ring vent pipe 217 to the middle ring cavity 213. The outer ring gas passage 25 runs from the outer ring ejector pipe 22c through the outer ring vent pipe 218 to the outer ring cavity 214.

[0081] That is, the inner cavity of the inner ring ejector tube 22a forms an inner ring ejector channel 22a1, the inner cavity of the middle ring ejector tube 22b forms a middle ring ejector channel 22b1, and the inner cavity of the outer ring ejector tube 22c forms an outer ring ejector channel 22c1; the central sleeve 212 has an upper open inner ring premixing cavity 2121, the middle ring cavity 213 has an upper open middle ring premixing cavity 2131, and the outer ring cavity 214 has an upper open outer ring premixing cavity 2141; the middle ring ventilation section 217 has a middle ring ventilation channel 2171, the outer ring ventilation section 218 has an outer ring ventilation channel 2181, and the central ventilation tube section 216 has an inner ring ventilation channel 2161. The inner ring gas passage 23 includes an inner ring ejector passage 22a1, an inner ring ventilation passage 2161, and an inner ring premixing chamber 2121 connected in sequence. The middle ring gas passage 24 includes a middle ring ejector passage 22b1, a middle ring ventilation passage 2171, and a middle ring premixing chamber 2131 connected in sequence. The outer ring gas passage 25 includes an outer ring ejector passage 22c1, an outer ring ventilation passage 2181, and an outer ring premixing chamber 2141 connected in sequence.

[0082] Both the outer ring ventilation section 218 and the middle ring ventilation section 217 pass through the top plate section 211 and are connected to the top plate section 211. In one embodiment, both the middle ring ventilation section 217 and the outer ring ventilation section 218 are arc-shaped structures extending circumferentially along the furnace base 21. The width of the middle ring ventilation section 217 and the outer ring ventilation section 218 along the circumferential direction of the furnace base 21 gradually decreases from top to bottom, so that the upper ports of the middle ring ventilation channel 2171 and the outer ring ventilation channel 2181 are wider, which is conducive to improving the uniformity of air intake into the corresponding middle ring premixing chamber 2131 and the outer ring premixing chamber 2141. The lower ports of the middle ring ventilation channel 2171 and the outer ring ventilation channel 2181 are relatively narrow, which is conducive to realizing the connection with the corresponding middle ring ejector channel 22b1 and the outer ring ejector channel 22c1.

[0083] In one embodiment, the vertical air intake section 262 and the middle ring ventilation section 217 are located on opposite sides of the middle ring cavity 213, thereby enabling the vertical air intake section 262 and the middle ring ventilation section 217 to support opposite sides of the middle ring cavity 213. This avoids the need for additional structures to support the middle ring cavity 213 between the middle ring cavity 213 and the top plate section 211, thus further simplifying the structure of the burner assembly 2.

[0084] In one embodiment, the furnace base 21 and the ejector tube 22 are detachably connected, thereby simplifying the processing of the furnace head assembly 2 and reducing its processing difficulty. To improve the ease of connection between the ejector tube 22 and the furnace base 21, the furnace base 21 has three connecting pipe sections 215. These three connecting pipe sections 215 are respectively connected to the lower ends of the inner ring ventilation channel 2161, the middle ring ventilation section 217, and the outer ring ventilation section 218. The other ends of the three connecting pipe sections 215 are coaxially connected to the three ejector tubes 22. The connecting pipe sections 215 and the ejector tubes 22 can be connected by screws to improve connection stability and reliability. The specific structure of the ejector tube 22 and its connection structure with the furnace base 21 can be set with reference to existing technology, which is not the focus of this embodiment and will not be described further here. In one embodiment, the furnace base 21 is integrally formed. Since the upper end of the furnace base 21 has a central sleeve 212, a middle ring cavity 213 and an outer ring cavity 214, the furnace base 21 itself can also perform the function of gas distribution, without the need to set up an additional gas distribution seat, thereby simplifying the overall structure of the burner and reducing the cost of the burner.

[0085] like Figure 7 As shown, in one embodiment, the outer ring flame hole 136 is disposed on the outer periphery of the outer ring flame cap 13. In order to better guide the conduction of flame between the inner ring flame hole 112 and the outer ring flame hole 136, the upper end of the outer ring flame cap 13 is provided with an outer ring ignition slit 137. The outer ring ignition slit 137 extends radially along the outer ring flame cap 13, and the inner end of the outer ring ignition slit 137 penetrates the inner sidewall of the outer ring flame cap 13. The outer end of the outer ring ignition slit 137 extends to the outer ring flame hole 136. The outer ring ignition slit 137 and the first ignition slit 129 are arranged opposite each other in the radial direction of the flame cap assembly 1. By setting the outer ring flame hole 136 on the outer periphery of the outer ring flame cap 13, the flame flowing out of the outer ring flame hole 136 can flow upward and outward, increasing the flame coverage of the flame cap assembly 1, and avoiding mutual interference between the flames at the middle ring flame hole 126 and the outer ring flame hole 136, thus improving combustion stability. By setting the outer ring ignition slit 137 on the outer ring flame cap 13, which is directly opposite the first ignition slit 129, the flame on the inner ring flame cap 11 can be reliably guided to the outer ring flame cap 13 after being guided along the first ignition slit 129 to the outside of the middle ring flame cap 12, and then to the outer ring flame hole 136 of the outer ring flame cap 13, thus improving the reliability of ignition.

[0086] like Figure 7 and Figure 8As shown, to ensure that the first ignition seam 129 and the outer ring ignition seam 137 are aligned radially along the burner cap assembly 1 during assembly, in one embodiment, the burner head assembly 2 is provided with a middle ring positioning structure 219 and an outer ring positioning structure 210. The middle ring burner cap 12 is provided with a first mating structure 1203, and the outer ring burner cap 13 is provided with a second mating structure 138. The first mating structure 1203 cooperates with the middle ring positioning structure 219 to limit the position of the middle ring burner cap 12 in the circumferential direction of the burner head assembly 2. The second mating structure 1303... 8 cooperates with the outer ring positioning structure 210 to limit the position of the outer ring flame cap 13 on the circumference of the burner assembly 2. Thus, through the cooperation between the middle ring positioning structure 219 and the first cooperation structure 1203 and the cooperation between the outer ring positioning structure 210 and the second cooperation structure 138, the installation positions of the middle ring flame cap 12 and the outer ring flame cap 13 on the circumference of the burner assembly 2 are fixed. This effectively ensures that the outer ring ignition seam 137 on the outer ring flame cap 13 and the first ignition seam 129 on the middle ring flame cap 12 are aligned.

[0087] In one embodiment, the central ring flame cap 12 includes an inner ring wall 121 and an outer ring wall 122 spaced apart, and a central ring top wall 123 connecting the top ends of the outer ring wall 122 and the inner ring wall 121. The inner ring wall 121, the outer ring wall 122, and the central ring top wall 123 together form a central ring air cavity 125. A central ring positioning ring portion 124 extends downward from the front side of the inner ring wall 121, and a central ring stepped surface is formed between the central ring positioning ring portion 124 and the inner ring wall 121, located outside the central ring positioning ring portion 124 and facing downward.

[0088] The central ring cavity 213 includes two opposing and spaced-apart central ring cavity walls and a central ring cavity bottom connecting the lower ends of the two central ring cavity walls. The central ring cavity bottom and the two central ring cavity walls together form a central ring premixing cavity 2131. The central ring cavity bottom has a central ring connecting port that connects to the central ring ventilation channel 2171. The outer wall 122 of the central ring is attached to the outer central ring cavity wall, the inner central ring cavity wall abuts against the central ring stepped surface, and the central ring positioning ring 124 is inserted into the inner side of the central ring cavity 213. This allows the central ring flame cap 12 to be mounted and positioned axially and radially on the central ring cavity 213.

[0089] In one embodiment, the outer ring flame cap 13 includes an inner outer ring wall 131 and an outer outer ring wall 132 spaced apart, and an outer ring top wall 133 connecting the top ends of the outer outer ring wall 132 and the inner outer ring wall 131. The inner outer ring wall 131, the outer outer ring wall 132, and the outer ring top wall 133 together form an outer ring air cavity 135. An outer ring positioning ring portion 134 extends downward from the front side of the inner outer ring wall 131, and an outer ring step surface is formed between the outer ring positioning ring portion 134 and the inner outer ring wall 131, located outside the outer ring positioning ring portion 134 and facing downward.

[0090] The outer ring cavity 214 includes two opposing and spaced-apart outer ring cavity walls and an outer ring cavity bottom connected between the lower ends of the two outer ring cavity walls. The outer ring cavity bottom and the two outer ring cavity walls together form an outer ring premixing cavity 2141. The outer ring cavity bottom has an outer ring communication port that connects to the outer ring ventilation channel 2181. The outer ring outer wall 132 is attached to the outer outer ring cavity wall, the inner outer ring cavity wall abuts against the outer ring stepped surface, and the outer ring positioning ring part 134 is inserted into the inner side of the outer ring cavity 214. This enables the outer ring flame cap 13 to be circumferentially and radially positioned on the outer ring cavity 214.

[0091] In one embodiment, the middle ring positioning structure 219 includes a middle ring positioning protrusion, and the first mating structure 1203 is a middle ring positioning slot provided on the middle ring flame cover 12. The middle ring positioning protrusion is vertically inserted into the middle ring positioning slot to achieve installation positioning. And / or, the outer ring positioning structure 210 includes an outer ring positioning protrusion, and the first mating structure 1203 is an outer ring positioning slot provided on the outer ring flame cover 13. The outer ring positioning protrusion is vertically inserted into the outer ring positioning slot to achieve installation positioning. By setting the middle ring positioning structure 219 on the middle ring positioning protrusion and setting the outer ring positioning structure 210 on the outer ring positioning protrusion, the middle ring positioning structure 219 and the outer ring positioning structure 210 can be more easily identified visually, thereby improving assembly efficiency.

[0092] Specifically, the middle ring positioning protrusion is located at the bottom of the middle ring premixing cavity 2131, and the outer ring positioning protrusion is located at the bottom of the outer ring premixing cavity 2141. The middle ring positioning slot is located in the inner wall 121 of the middle ring, and the outer ring positioning slot is located in the inner wall 131 of the outer ring. By placing the middle ring positioning structure 219 inside the middle ring premixing cavity 2131 and the outer ring positioning structure 210 inside the outer ring premixing cavity 2141, the problem of increased burner cleaning difficulty caused by the protrusion of the middle ring positioning structure 219 and / or the outer ring positioning structure 210 is avoided.

[0093] In one embodiment, the middle ring positioning structure 219 is positioned close to the lower partition 261 to ensure the sealing of the connection between the ignition outlet channel 127 and the ignition inlet channel 264. Specifically, the central angle between the middle ring positioning structure 219 and the lower partition 261 relative to the axis of the middle ring cavity 213 is less than 90°.

[0094] In one embodiment, the burner further includes a middle ring flow equalizer and an outer ring flow equalizer. The middle ring flow equalizer is mounted above the middle ring vent and extends circumferentially along the middle ring premixing chamber 2131, guiding a portion of the airflow entering the middle ring premixing chamber 2131 from the middle ring vent to flow away from the middle ring vent along the middle ring flow equalizer, thereby improving the circumferential uniformity of the gas mixture in the middle ring premixing chamber 2131. The outer ring flow equalizer is mounted above the outer ring vent and extends circumferentially along the outer ring premixing chamber 2141, guiding a portion of the airflow entering the outer ring premixing chamber 2141 from the outer ring vent to flow away from the outer ring vent along the outer ring flow equalizer, thereby improving the circumferential uniformity of the gas mixture in the outer ring premixing chamber 2141. Both the middle ring flow equalizer and the outer ring flow equalizer have several air holes so that some of the airflow can flow upward through the air holes into the corresponding middle ring air chamber 125 or outer ring air chamber 135.

[0095] Example 2

[0096] This embodiment provides a burner and a gas stove containing the burner. The basic structure of the burner provided in this embodiment is the same as that in the above embodiments, with only some differences in the settings. This embodiment will not repeat the same structure as the above embodiments.

[0097] like Figures 9 to 12 As shown, in this embodiment, the second end of the ignition intake passage 264 is connected to the outer ring gas passage 25. Thus, when both the outer ring gas passage 25 and the inner ring gas passage 23 are supplied with gas, part of the mixed gas in the outer ring gas passage 25 enters the ignition outlet passage 127 through the ignition intake passage 264 and then flows upward through the first ignition slit 129.

[0098] In this embodiment, an outer extension 265 is provided on the outer side wall of the outer ring vent 218, which is directly opposite the transverse air intake 263. The transverse channel 2641 passes through the outer extension 265 to facilitate the inward processing of the transverse channel 2641 through the outer extension 265. The plug 3 is installed on the outer extension 265.

[0099] In this embodiment, the central ring positioning structure 219 includes a central ring protrusion protruding from the outer wall of the central ring premixing cavity 2131. A central ring positioning slot is formed downwards at the upper end of the central ring protrusion. The first mating structure 1203 includes a central ring positioning protrusion protruding from the lower side of the central ring flame cap 12, which is vertically inserted into the central ring positioning slot. The central ring positioning protrusion can be integrally formed in the central ring flame cap 12, or it can be detachably connected to the central ring flame cap 12.

[0100] The outer ring positioning structure 210 includes an outer ring protrusion protruding from the outer wall of the outer ring premixing cavity 2141. An outer ring positioning slot is formed at the upper end of the outer ring protrusion. The second mating structure 138 includes an outer ring positioning protrusion protruding from the lower side of the outer ring flame cap 13. The outer ring positioning protrusion is inserted into the outer ring positioning slot. The outer ring positioning protrusion can be integrally formed in the outer ring flame cap 13, or it can be detachably connected to the outer ring flame cap 13.

[0101] Furthermore, the middle ring positioning slot extends radially through one side of the middle ring protrusion along the flame cap assembly 1 to reduce the machining difficulty of the middle ring positioning slot and improve the assembly efficiency of the middle ring flame cap 12. The outer ring positioning slot extends radially through one side of the outer ring protrusion to reduce the machining difficulty of the middle ring positioning slot and improve the assembly efficiency of the outer ring flame cap 13.

[0102] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0103] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A multi-ring burner, characterized in that, The device includes a burner assembly (2) and a flame cap assembly (1) installed on the upper end of the burner assembly (2). The flame cap assembly (1) includes an inner ring flame cap (11), a middle ring flame cap (12), and an outer ring flame cap (13) spaced apart from the inside to the outside. The inner ring flame cap (11) has an inner ring flame hole (112), the middle ring flame cap (12) has a middle ring flame hole (126), and the outer ring flame cap (13) has an outer ring flame hole (136). The burner assembly (2) and the burner cap assembly (1) cooperate to form an inner ring gas supply channel for supplying gas to the inner ring burner hole (112), a middle ring gas supply channel for supplying gas to the middle ring burner hole (126), and an outer ring gas supply channel for supplying gas to the outer ring burner hole (136). The upper end of the middle ring burner cap (12) is provided with a first ignition slit (129) through the radial direction. The multi-ring burner has an ignition channel. The ignition channel is separated from the middle ring gas supply channel and the middle ring burner hole (126). The outlet end of the ignition channel extends into the middle ring gas supply channel and communicates with the first ignition slit (129). The inlet end of the ignition channel communicates with the inner ring gas supply channel or the outer ring gas supply channel.

2. The multi-ring burner according to claim 1, characterized in that, The middle ring flame cap (12) has a middle ring gas chamber (125) that communicates with the middle ring flame hole (126). The middle ring gas chamber (125) forms the gas outlet of the middle ring gas supply channel. The ignition channel includes an ignition gas outlet channel (127). The ignition gas outlet channel (127) is located inside the middle ring gas chamber (125) and is separated from the middle ring gas chamber (125). The ignition gas outlet channel (127) is vertically connected to the first ignition seam (129).

3. The multi-ring burner according to claim 2, characterized in that, The ignition channel also includes an ignition air intake channel (264), which is disposed on the burner assembly (2); The inner ring gas supply channel includes an inner ring gas channel (23) located within the burner assembly (2), and the outer ring gas supply channel includes an outer ring gas channel (25) located within the burner assembly (2). The inlet end of the ignition gas inlet channel (264) is connected to the inner ring gas channel (23) or the outer ring gas channel (25), and the outlet end of the ignition gas inlet channel (264) is connected to the ignition gas outlet channel (127).

4. The multi-ring burner according to claim 3, characterized in that, The central ring gas supply channel includes a central ring premixing chamber (2131) formed on the upper end of the burner assembly (2). The central ring premixing chamber (2131) is open and communicates directly with the central ring gas chamber (125). The outlet end of the ignition gas inlet channel (264) extends upward into the interior of the central ring premixing chamber (2131) and is separated from the central ring premixing chamber (2131). The outlet end of the ignition gas inlet channel (264) and the ignition gas outlet channel (127) are communicated vertically.

5. The multi-ring burner according to claim 4, characterized in that, The top wall of the middle ring gas chamber (125) is provided with an upper partition (128) protruding downwards, and the upper partition (128) and the cavity wall of the middle ring gas chamber (125) enclose the ignition gas outlet channel (127). The bottom of the middle ring premixing chamber (2131) is provided with a lower partition (261). The lower partition (261) and the cavity wall of the middle ring premixing chamber (2131) enclose each other to form a cavity. The cavity forms the outlet channel (2643) of the ignition air intake channel (264). The upper partition (128) and the lower partition (261) are aligned and fitted together vertically.

6. The multi-ring burner according to claim 4, characterized in that, The ignition intake channel (264) includes a vertical channel section and a horizontal channel section (2641). The vertical channel section extends vertically and its upper end extends into the middle ring premixing chamber (2131). The horizontal channel section (2641) is connected to the lower end of the vertical channel section and extends horizontally through the outer wall of the burner assembly (2). The horizontal channel section (2641) is connected to the outer ring gas channel (25) or the inner ring gas channel (23). The multi-ring burner includes a plug (3) that blocks the port of the transverse channel section (2641).

7. The multi-ring burner according to claim 6, characterized in that, The burner assembly (2) has a top plate (211) and a middle ring cavity (213) mounted above the top plate (211). The middle ring cavity (213) has a middle ring premixing cavity (2131). The inlet ends of the outer ring gas supply channel, the inner ring gas supply channel and the middle ring gas supply channel are all located below the top plate (211) and the outlet ends are all located above the top plate (211). A vertical air intake section (262) is connected between the bottom of the central ring cavity (213) and the top plate (211). The vertical air intake section (262) contains the vertical channel section. A horizontal air intake section (263) is provided on the lower side of the top plate (211). The horizontal air intake section (263) contains the horizontal channel section (2641).

8. The multi-ring burner according to any one of claims 2-7, characterized in that, The middle ring flame cap (12) is provided with a first ignition hole (1201), the first end of the first ignition hole (1201) penetrates the inner wall of the middle ring flame cap (12), the second end of the first ignition hole (1201) is connected to the ignition channel, and the first ignition hole (1201) is separated from the middle ring gas chamber (125). And / or, the middle ring flame cap (12) is provided with a second ignition hole (1202), the first end of the second ignition hole (1202) is connected to the ignition channel, the second end of the second ignition hole (1202) penetrates the outer wall of the middle ring flame cap (12), and the second ignition hole (1202) is separated from the middle ring gas chamber (125).

9. The multi-ring burner according to any one of claims 1-7, characterized in that, The outer ring fire hole (136) is provided on the outer wall of the outer ring fire cover (13), and the upper end surface of the outer ring fire cover (13) is provided with an outer ring ignition slit (137). The first end of the outer ring ignition slit (137) penetrates the inner wall of the outer ring fire cover (13) and the second end extends to the outer ring fire hole (136). The outer ring gas supply channel includes an outer ring gas chamber (135) located inside the outer ring flame cap (13). The outer ring ignition slit (137) and the outer ring flame hole (136) are both connected to the outer ring gas chamber (135). The outer ring ignition slit (137) and the first ignition slit (129) are arranged opposite each other in the radial direction of the flame cap assembly (1).

10. The multi-ring burner according to claim 9, characterized in that, The burner assembly (2) is provided with a central ring positioning structure (219), and the central ring flame cover (12) is provided with a first mating structure (1203). The central ring positioning structure (219) and the first mating structure (1203) cooperate to position the central ring flame cover (12) in the circumferential direction of the burner assembly (2). The burner assembly (2) is provided with an outer ring positioning structure (210), and the outer ring flame cap (13) is provided with a second mating structure (138). The outer ring positioning structure (210) and the second mating structure (138) cooperate to position the outer ring flame cap (13) in the circumferential direction of the burner assembly (2).

11. A gas stove, characterized in that, Including the multi-ring burner as described in any one of claims 1-10.

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