Furnace end assembly and combustor thereof

Abstract

The furnace end assembly comprises a furnace end body, the furnace end body is provided with an inner premixing cavity with an upward opening and an outer premixing cavity with an upward opening, the outer premixing cavity is located on the periphery of the inner premixing cavity, and the outer premixing cavity and the inner premixing cavity are adjacently arranged; the burner body is further provided with at least one outer ring gas outlet, the outer ring gas outlet vertically penetrates through the cavity bottom face of the outer premixing cavity, the upper end of the outer ring gas outlet is communicated with the outer premixing cavity, and the upper end face of the outer ring gas outlet is higher than the cavity bottom face of the outer premixing cavity and lower than the upper end face of the outer premixing cavity. The furnace end assembly is easy to clean, mutual interference of outer ring mixed gas can be reduced, and the mixing uniformity of the outer ring mixed gas is improved. The utility model further discloses a burner.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking stoves, in particular to a burner assembly and a burner thereof. Background Art

[0002] For the existing burner, the gas is pre-mixed in the cavity of the burner head and then directly reaches the burner cap and burns through the burner holes. In this way, the gas velocity and air pressure at each position of the burner cap from the burner head to the burner holes are different, resulting in inconsistent flame states during combustion. The gas outlet velocity of the burner holes on the burner cap directly above the gas outlet of the burner head is relatively fast, the air pressure is relatively large, and the flame length is significantly longer, and the flame lengths are not basically the same, which affects the combustion effect and combustion performance.

[0003] In addition, in order to supplement secondary air for the existing burner, a horizontal secondary air channel and a secondary air cavity with an upward opening are usually arranged on the burner head. This not only increases the width and height of the burner head, resulting in the problem that the burner protrudes too high from the glass panel and affects the overall aesthetic effect of the kitchen, but also the liquid overflowing from the pot will accumulate in the secondary air channel and the secondary air cavity, which is not convenient for cleaning. Summary of the Invention

[0004] The utility model aims to solve at least one of the problems existing in the related art to a certain extent. For this purpose, the utility model provides a burner assembly with a simple structure, which is not only easy to clean, but also can reduce the mutual interference of the outer ring mixed gas and improve the mixing uniformity of the outer ring mixed gas. The utility model also provides a burner.

[0005] According to the above-provided burner assembly, it is realized through the following technical solutions:

[0006] A burner assembly includes a burner head body, the burner head body is provided with an inner pre-mixing cavity with an upward opening and an outer pre-mixing cavity with an upward opening, the outer pre-mixing cavity is located outside the inner pre-mixing cavity and the two are arranged adjacent to each other; the burner head body is further provided with at least one outer ring gas outlet, the outer ring gas outlet vertically penetrates the bottom surface of the outer pre-mixing cavity and its upper end is communicated with the outer pre-mixing cavity, and the upper end surface of the outer ring gas outlet is higher than the bottom surface of the outer pre-mixing cavity and lower than the upper end surface of the outer pre-mixing cavity.

[0007] In some embodiments, the number of the outer ring gas outlets is two, and the two outer ring gas outlets are respectively arranged on the opposite outer sides of the inner pre-mixing cavity.

[0008] In some embodiments, the radially inner end of the outer ring gas outlet is fixedly connected to the inner ring wall of the outer pre-mixing cavity, and a gap for the airflow to pass through is left between the radially outer end of the outer ring gas outlet and the outer ring wall of the outer pre-mixing cavity.

[0009] In some embodiments, an outer annular boss arranged in the circumferential direction is provided at the upper end of the side of the inner ring wall facing away from the inner premixing chamber, and the top surface of the outer annular boss is flush with the upper end surface of the outer ring air outlet; and / or a plurality of clearance parts arranged at intervals in the circumferential direction are recessed in the outer ring wall, and fixing holes are provided at positions of the burner body corresponding to the clearance parts.

[0010] In some embodiments, an inner ring premixing head extending downward is fixedly provided at the position of the bottom of the burner body corresponding to the inner premixing chamber, and the inner ring premixing head is communicated with the lower end of the inner premixing chamber; an outer ring premixing head extending downward is fixedly provided at the position of the bottom of the burner body corresponding to the outer ring air outlet, and the upper end of the outer ring premixing head is communicated with the lower end of the corresponding outer ring air outlet.

[0011] In some embodiments, a horizontally arranged inner ring straight pipe and a horizontally arranged outer ring straight pipe are provided below the burner body, the inner ring straight pipe and the outer ring straight pipe are arranged in parallel and in the same direction, the air outlet end of the outer ring straight pipe is communicated with the lower end of the inner ring premixing head, and the air outlet end of the outer ring straight pipe is communicated with the lower end of the outer ring premixing head.

[0012] In some embodiments, an upward extending upper positioning part is fixedly provided at the top of the burner body, the upper positioning part is located in the outer premixing chamber and is arranged close to the inner premixing chamber, and a vertical installation hole is provided on the burner body, and the vertical installation hole penetrates through the top of the upper positioning part and the bottom of the burner body respectively.

[0013] In some embodiments, a downward extending lower installation part is fixedly provided at the position of the bottom of the burner body corresponding to the upper positioning part, the lower end of the vertical installation hole vertically penetrates through the lower installation part, and a connecting hole with a downward opening is provided on the lower installation part.

[0014] In some embodiments, an inner annular boss arranged in the circumferential direction is provided on the inner surface of the chamber wall at the upper end of the inner premixing chamber, the inner annular boss is higher than the upper end surface of the outer ring air outlet and lower than the upper end surface of the inner premixing chamber; and / or a vertical groove opening inward and upward is provided on the chamber wall of the inner premixing chamber, and the vertical groove is communicated with the inner premixing chamber.

[0015] In some embodiments, an ejector structure is further included, the ejector structure includes an inner ejector pipe and at least one outer ejector pipe, the air outlet end of the inner ejector pipe is communicated with the inner premixing chamber, and the outer ejector pipes are arranged in one-to-one correspondence with and communicated with the outer ring air outlets.

[0016] According to the burner head assembly provided above, it is realized through the following technical solutions:

[0017] A burner, comprising: a burner cap assembly provided with an inner ring gas chamber opening downward and an outer ring gas chamber opening downward and located outside the periphery of the inner ring gas chamber. A plurality of inner ring fire holes located above the outer ring gas chamber are provided at the top or the upper end of the outer side wall of the inner ring gas chamber. A plurality of outer ring fire holes are formed in the outer side wall of the outer ring gas chamber; and a burner head assembly as described above. The burner head assembly is arranged at the bottom of the burner cap assembly. The inner premixing chamber is communicated with the inner ring fire holes through the inner ring gas chamber. The outer premixing chamber is communicated with the outer ring fire holes through the outer ring gas chamber. The outer ring air outlet is arranged towards the top of the outer ring gas chamber, and a gap is left between the upper end surface of the outer ring air outlet and the top of the outer ring gas chamber.

[0018] In some embodiments, a liquid receiving groove opening upward and located outside the periphery of the inner ring gas chamber is recessed on the top of the burner cap assembly. The outer ring air outlet is arranged directly below the bottom surface of the liquid receiving groove, and a gap is left between the upper end surface of the outer ring air outlet and the bottom surface of the liquid receiving groove.

[0019] In some embodiments, a fire transfer part arranged in the radial direction is provided on the outer groove wall of the liquid receiving groove. A fire transfer channel arranged horizontally and higher than the bottom surface of the liquid receiving groove is provided on the fire transfer part. The fire transfer channel is communicated with the liquid receiving groove and the outer ring gas chamber respectively; and / or a plurality of diversion grooves arranged at intervals in the circumferential direction are formed in the outer groove wall of the liquid receiving groove. The radially inner ends of the diversion grooves are communicated with the liquid receiving groove.

[0020] In some embodiments, an ignition assembly is further included. An ignition hole group and a brim extending outward and located above the ignition hole group are provided on the outer side wall of the inner ring gas chamber. A through hole located directly below the brim is formed in the burner cap assembly. A vertical installation hole is formed in the burner head body corresponding to the position of the through hole. The ignition assembly is arranged directly below the brim, and sequentially passes through the through hole and the vertical installation hole vertically and is detachably connected to the burner head body.

[0021] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0022] 1. For the burner head assembly of the present utility model, by providing coaxially arranged inner and outer premixing chambers on the burner head body, and providing at least one outer ring air outlet vertically penetrating the bottom surface of the outer premixing chamber on the burner head body, the upper end surface of the outer ring air outlet is located between the bottom surface and the upper end surface of the outer premixing chamber and is communicated with the outer premixing chamber at its upper end. The structure is simple. Compared with the burner head with a secondary air channel and an air chamber, the secondary air channel and the air chamber are omitted, effectively reducing the width and height of the burner head body, preventing the liquid overflowing from the pot from accumulating in the burner head body, making the burner head assembly easy to clean, and at the same time being able to reduce the interference between the outer ring mixed gases and improve the mixing uniformity of the outer ring mixed gases;

[0023] 2. The burner of the present utility model arranges the outer ring flame holes on the outer side wall of the outer ring flame cover, and arranges the outer ring air outlet of the burner head assembly towards the top of the outer ring air chamber of the flame cover assembly, leaving a gap between the upper end face of the outer ring air outlet and the top of the outer ring air chamber. By means of this gap, the flow direction of the outer ring mixed gas is changed to ensure uniform mixing of the outer ring mixed gas, and then it flows out from the outer ring flame holes, preventing the problem of local flames being too long and improving the performance of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an exploded view of the burner head assembly in Embodiment 1 of the present utility model;

[0025] Figure 2 is a schematic structural view of the burner head assembly in Embodiment 1 of the present utility model Figure 1 ;

[0026] Figure 3 is a schematic structural view of the burner head assembly in Embodiment 1 of the present utility model Figure 2 ;

[0027] Figure 4 is a sectional view of the burner head assembly in Embodiment 1 of the present utility model Figure 1 ;

[0028] Figure 5 is a sectional view of the burner head assembly in Embodiment 1 of the present utility model Figure 2 ;

[0029] Figure 6 is an exploded view of the burner in Embodiment 2 of the present utility model;

[0030] Figure 7 is a schematic structural view of the burner in Embodiment 2 of the present utility model;

[0031] Figure 8 is a sectional view of the burner in Embodiment 2 of the present utility model;

[0032] Figure 9 is a sectional view of the flame cover assembly in Embodiment 2 of the present utility model.

[0033] In the figure: 1 - burner head assembly, 11 - burner head body, 1101 - fixing hole, 1102 - vertical mounting hole, 1103 - connection hole, 111 - inner premixing chamber, 1111 - inner annular boss, 1112 - vertical groove, 112 - outer premixing chamber, 1121 - inner ring wall, 1122 - outer ring wall, 1123 - outer annular boss, 1124 - clearance part, 1131 - outer ring air outlet, 1132 - outer ring premixing head, 1133 - outer ring straight pipe, 1141 - inner ring premixing head, 1142 - inner ring straight pipe, 1151 - upper positioning part, 1152 - lower mounting part, 116 - support leg, 12 - ejector structure, 121 - inner ejector pipe, 122 - outer ejector pipe, 123 - fixing plate, 124 - connecting rib, 125 - bracket, 13 - nozzle fixing seat, 131 - inner ring nozzle, 132 - outer ring nozzle;

[0034] 2 - burner cap assembly, 201 - inner ring air chamber, 202 - outer ring air chamber, 21 - outer burner cap, 211 - outer ring flame holes, 212 - liquid holding tank, 213 - flame transfer part, 2131 - flame transfer channel, 2132 - ignition hole, 214 - diversion groove, 215 - through hole, 22 - inner burner cap, 221 - inner ring flame holes, 222 - ignition hole, 223 - brim;

[0035] 3 - ignition assembly. Specific embodiments

[0036] The following embodiments illustrate the present invention, but the present invention is not limited by these embodiments. Modifying the specific embodiments of the present invention or making equivalent replacements for some technical features without departing from the spirit of the present invention's solution shall be covered within the scope of the technical solution claimed by the present invention.

[0037] Embodiment 1

[0038] Referring to Figures 1-5 , this embodiment provides a burner head assembly, including a burner head body 11 and an ejector structure 12. Among them, the burner head body 11 is preferably an aluminum alloy burner head, which can realize the low-cost aluminum alloy die-casting process and ensure the stability of combustion performance at the same time. The ejector structure 12 is detachably connected to the burner head body through fasteners (such as screws).

[0039] The burner body 11 is provided with an inner premixing cavity 111 opening upward and an outer premixing cavity 112 opening upward and located outside the inner premixing cavity 111. In this embodiment, the inner premixing cavity 111 and the outer premixing cavity 112 are arranged adjacent to each other, and the inner circumferential wall 1121 of the outer premixing cavity 112 serves as the cavity wall of the inner premixing cavity 111. Since the inner premixing cavity 111 and the outer premixing cavity 112 are arranged adjacent to each other, there is no upward-opening air cavity between the inner premixing cavity 111 and the outer premixing cavity 112, and of course, there is no transverse secondary channel communicating with the air cavity. Compared with the existing burner with a secondary air channel and an air cavity, the secondary air channel and the air cavity are omitted, effectively reducing the width and height of the burner body, preventing the liquid overflowing from the pot from accumulating in the burner body, and making the burner assembly easy to clean.

[0040] The burner body 11 is further provided with at least one outer ring air outlet 1131 located outside the inner premixing cavity 111. The outer ring air outlet 1131 vertically penetrates the bottom surface of the outer premixing cavity 112 and its upper end communicates with the outer premixing cavity 112. The upper end surface of the outer ring air outlet 1131 is higher than the bottom surface of the outer premixing cavity 112 and lower than the upper end surface of the outer premixing cavity 112. In this way, the outer ring mixed gas first flows upward from the outer ring air outlet 113, and then fills the outer premixing cavity 112, which can reduce the interference between the outer ring mixed gases and improve the mixing uniformity of the outer ring mixed gases to enhance the combustion performance.

[0041] Reference Figure 2 , specifically, an inner annular boss 1111 arranged in the circumferential direction is provided on the inner surface of the cavity wall at the upper end of the inner premixing cavity 111. The inner annular boss 1111 is higher than the upper end surface of the outer ring air outlet 1131 and lower than the upper end surface of the inner premixing cavity 111, and is used for the lower limit position of the radially inner side of the burner head assembly; and / or a vertical groove 1112 opening inward and upward is provided on the cavity wall of the inner premixing cavity 111. The vertical groove 1112 communicates with the inner premixing cavity 111 and is used for quickly limiting and fixing the burner head assembly to prevent the burner head assembly from rotating circumferentially relative to the burner body 11.

[0042] Reference Figures 1-2 , in this embodiment, the number of the outer ring air outlets 1131 is two, and the two outer ring air outlets 1131 are respectively arranged on the opposite outer sides of the inner premixing cavity 111. In this way, it is beneficial to increase the unit air outlet area, facilitate the outer ring mixed gas to quickly and evenly fill the outer premixing cavity 112, and at the same time ensure that the outer ring mixed gases do not interfere with each other when flowing upward from the outer ring air outlet 113.

[0043] Specifically, the radially inner end of the outer ring gas outlet 1131 is fixedly connected to the inner ring wall 1121 of the outer pre-mixing chamber 112, so that the outer ring gas outlet 1131 is close to the inner pre-mixing chamber 111. This not only helps to reduce the width of the burner head body 11 in the radial direction, but also helps to increase the distance between the radially inner side of the outer ring gas outlet 1131 and the outer ring flame holes on the outer side wall of the burner cap assembly, so as to extend the gas flow path of the outer ring mixed gas flowing upward from the radially inner side of the outer ring gas outlet 1131, making the mixing of the outer ring mixed gas more uniform and improving the combustion efficiency. A spacing for the gas flow is left between the radially outer end of the outer ring gas outlet 1131 and the outer ring wall 1122 of the outer pre-mixing chamber 112, so as to leave a certain distance between the radially outer side of the outer ring gas outlet 1131 and the outer ring flame holes on the outer side wall of the burner cap assembly, to prevent the outer ring mixed gas flowing upward from the radially outer side of the outer ring gas outlet 1131 from directly flowing to the outer ring flame holes of the burner cap assembly and avoid the problem of longer local flames.

[0044] Reference Figure 2 , specifically, an outer annular boss 1123 arranged in the circumferential direction is provided at the upper end of the side of the inner ring wall 1121 facing away from the inner pre-mixing chamber 111, and the top surface of the outer annular boss 1123 is flush with the upper end surface of the outer ring gas outlet 1131 to simplify the processing and manufacturing process; and / or a plurality of clearance parts 1124 recessed outwardly and upwardly are provided on the outer ring wall 1122, and the plurality of clearance parts 1124 are arranged at equal intervals in the circumferential direction of the outer ring wall 1122. The clearance parts 1124 are used to provide a certain installation space for the installation and fixation of the liquid receiving tray. A fixing hole 1101 is provided at the position of the burner head body 11 corresponding to the clearance part 1124, and the fixing hole 1101 is used to fix the liquid receiving tray.

[0045] Reference Figures 3-5 , specifically, an inner ring pre-mixing head 1141 extending downward is integrally formed at the bottom of the burner head body 11 corresponding to the inner pre-mixing chamber 111, and the inner ring pre-mixing head 1141 is communicated with the lower end of the inner pre-mixing chamber 111. An outer ring pre-mixing head 1132 extending downward is fixedly provided at the bottom of the burner head body 11 corresponding to the outer ring gas outlet 1131, and the upper end of the outer ring pre-mixing head 1132 is communicated with the lower end of the corresponding outer ring gas outlet 1131.

[0046] More specifically, below the burner head body 11, there are arranged horizontally an inner ring straight pipe 1142 corresponding to the corresponding inner ring premixing head 1141 and an outer ring straight pipe 1133 corresponding to the corresponding outer ring premixing head 1132. The inner ring straight pipe 1142 and the outer ring straight pipe 1133 are arranged in parallel and in the same direction. The air outlet end of the outer ring straight pipe 1133 is communicated with the lower end of the inner ring premixing head 1141, and the air inlet end of the outer ring straight pipe 1133 is used to connect the outer ejector pipe in the ejector structure 12. The air outlet end of the outer ring straight pipe 1133 is communicated with the lower end of the outer ring premixing head 1132, and the air inlet end of the outer ring straight pipe 1133 is used to connect the inner ejector pipe in the ejector structure.

[0047] In this embodiment, the top of the inner ring straight pipe 1142 is higher than the tops of the two outer ring straight pipes 1133 to avoid insufficient space for arranging the inner ring straight pipe 1142 and the two outer ring straight pipes 1133 side by side, so as to solve the problems of arranging the inner ejector pipe and the two outer ejector pipes side by side, large volume of the burner and mutual interference of the primary air flows. In addition, the air inlet end of the inner ring straight pipe 1142 and the air inlet ends of the two outer ring straight pipes 1133 are fixedly connected by a connecting arm. An upwardly extending upper connecting portion is fixedly provided at the top of the outer ring straight pipe 1133, and the upper connecting portion is used for detachably connecting the upper end of the fixing plate 123 in the ejector structure 12; at the position corresponding to the inner ring straight pipe 1142 at the bottom of the connecting arm, a downwardly extending lower connecting portion is fixedly provided, and the lower connecting portion is used for detachably connecting the lower end of the fixing plate in the ejector structure 12.

[0048] Reference Figures 1-4 , specifically, an upwardly extending upper positioning portion 1151 is fixedly provided at the top of the burner head body 11. The upper positioning portion 1151 is located in the outer premixing chamber 112 and is arranged close to the inner premixing chamber 111. In this embodiment, the upper positioning portion 1151 is integrally formed with the burner head body 11, and the radially inner end of the upper positioning portion 1151 is integrally formed with the surface of the inner ring wall 1121 facing away from the inner premixing chamber 111. In addition, a vertical installation hole 1102 is provided on the burner head body 11. The vertical installation hole 1102 penetrates through the top of the upper positioning portion 1151 and the bottom of the burner head body 11 respectively, and is used for the ignition component in the burner to pass through vertically.

[0049] More specifically, a downwardly extending lower installation portion 1152 is fixedly provided at the bottom of the burner head body 11 corresponding to the upper positioning portion 1151. In this embodiment, the lower installation portion 1152 is in a gourd shape and is integrally formed with the bottom of the burner head body 11. The lower end of the vertical installation hole 1102 vertically penetrates through the lower installation portion 1152. A connection hole 1103 which is located outside the vertical installation hole 1102 and opens downward is provided on the lower installation portion 1152, and the connection hole 1103 is used for connecting and fixing the ignition component in the burner.

[0050] In this embodiment, two support feet 116 that extend downward and are arranged oppositely are fixedly provided at the bottom of the burner body 11, and the two support feet 116 are used for detachably connecting to the bottom case in the gas stove.

[0051] Reference Figures 1-5 , the injection structure 12 includes an inner injection tube 121 and at least one outer injection tube 122. The air outlet end of the inner injection tube 121 is inserted into the inner ring straight tube 1142 of the burner body 11, and the air outlet end of the inner injection tube 121 sequentially passes through the inner ring straight tube 1142 and the inner ring premixing head 1141 to communicate with the inner premixing chamber 111. The number of the outer injection tubes 122 is the same as the number of the outer ring air outlet 1131. The air outlet end of the outer injection tube 122 is inserted into the outer ring straight tube 1133 of the burner body 11, and the air outlet end of the outer injection tube 122 sequentially passes through the outer ring straight tube 1133 and the outer ring premixing head 1132 to communicate with the outer ring air outlet 1131.

[0052] In this embodiment, the number of the outer injection tubes 122 is two, and the two outer injection tubes 122 are respectively arranged on the left and right outer sides of the lower end of the inner injection tube 121. At this time, the inner injection tube 121 and the two outer injection tubes 122 enclose a triangle to solve the problems that the burner has a large volume and the primary air flows interfere with each other when three injectors are arranged side by side. Specifically, the injection structure 12 further includes a fixing plate 123. The fixing plate 123 is respectively sleeved outside the air outlet ends of the inner injection tube 121 and the two outer injection tubes 122, and the fixing plate 123 is respectively detachably connected to the upper and lower connecting parts of the burner body 11 through fasteners (such as screws); the outer side walls of the intake ends of the inner injection tube 121 are fixedly connected to the outer side walls of the intake ends of the two outer injection tubes 122, so that the inner injection tube 121 and the two outer injection tubes 122 are connected as a whole, which is convenient for integral processing and forming.

[0053] More specifically, a connecting rib 124 is provided between the middle part of the inner injection tube 121 and the middle part of one of the outer injection tubes 122, and a bracket 125 that extends downward is provided between the middle part of the inner injection tube 121 and the middle part of the other outer injection tube 122. The bottom surface of the bracket 125 is on the same plane as the bottom surfaces of the two support feet 116. At this time, the bracket 125 not only strengthens the connection strength between the inner injection tube 121 and the other outer injection tube 122, but also reliably supports the injection structure 12. And with the cooperation of the bracket 125 and the two support feet 116, stable and reliable support for the burner assembly or even the entire burner is realized.

[0054] Reference Figures 1-5, the burner head assembly further includes a nozzle fixing seat 13, which is fixedly connected to one end of the ejector structure 12 away from the burner head body 11. The gap between the nozzle fixing seat 13 and the end face of the ejector structure 12 is 15 - 25 mm. At the position of the nozzle fixing seat 13 corresponding to the inner ejector tube, an inner ring nozzle 131 is arranged facing the inner ejector tube. The inner ring nozzle 131 extends into the inner ejector tube, and the extension distance is 5 - 7 mm. Similarly, at the position of the nozzle fixing seat 13 corresponding to the outer ejector tube, an outer ring nozzle 132 is arranged facing the outer ejector tube. The outer ring nozzle 132 extends into the corresponding outer ejector tube, and the extension distance is 5 - 7 mm. The setting of the above distances is beneficial to improving the primary air coefficient for combustion.

[0055] Embodiment 2

[0056] Reference Figures 6-9 , this embodiment provides a burner, which includes a burner head assembly and a burner cap assembly 2 as described in Embodiment 1. Among them, the burner cap assembly 2 is formed by overlapping an outer burner cap 21 and an inner burner cap 22 that are independent of each other. Of course, the outer burner cap 21 and the inner burner cap 22 can also be integrally formed. In this embodiment, the burner cap assembly 2 is provided with an inner ring air chamber 201 with a downward opening and an outer ring air chamber 202 with a downward opening and located outside the inner ring air chamber 201. At the top or the upper end of the outer side wall of the inner ring air chamber 201, a plurality of inner ring fire holes 221 are provided above the outer ring air chamber 202. In this embodiment, the plurality of inner ring fire holes 221 are circumferentially spaced on the upper end of the outer side wall of the inner ring air chamber 201. A plurality of outer ring fire holes 211 are arranged at circumferential intervals on the outer side wall of the outer ring air chamber 202.

[0057] After the burner cap assembly 2 is covered on the top of the burner head body 11 of the burner head assembly 1, the inner premixing chamber 111 is connected to the inner ring fire holes 221 through the inner ring air chamber 201 to form an inner ring gas channel. The outer premixing chamber 112 is connected to the outer ring fire holes 211 through the outer ring air chamber 202 to form an outer ring gas channel. In this embodiment, the outer air outlet 1131 is arranged facing the top of the outer ring air chamber 202, and a gap H for air flow is left between the upper end face of the outer air outlet 1131 and the top of the outer ring air chamber 202. When the outer ring mixed gas flows upward from the outer air outlet 1131, the gas still has a certain outlet speed at this time. If this part of the gas directly flows upward from the burner cap assembly 2, there will be a problem of relatively long local flames. To solve this problem, the ring air outlet 1131 is designed to be arranged facing the top of the outer ring air chamber 202. By changing the gas flow direction through the gap H between the ring air outlet 1131 and the top of the outer ring air chamber 202, it is also beneficial for further mixing, ensuring uniform mixing of gas and air, and then flowing out from the outer ring fire holes on the outer side wall of the burner cap assembly 2.

[0058] Specifically, at the position of the top of the burner cap assembly 2 corresponding to the outer ring air chamber 202, a liquid receiving groove 212 with an upward opening and located outside the inner ring air chamber 201 is recessed, so that the burner cap assembly 2 can receive the overflow liquid from the pot. The inner ring fire holes 221 are arranged at the upper end of the outer side wall of the inner ring air chamber 201 and are higher than the bottom surface of the liquid receiving groove 212, and the air outlet or fire outlet direction of the inner ring fire holes 221 faces above the liquid receiving groove 212. The outer ring air outlet 1131 is arranged directly below the bottom surface of the liquid receiving groove 212, and a gap H for air flow is left between the upper end surface of the outer ring air outlet 1131 and the bottom surface of the liquid receiving groove 212.

[0059] More specifically, a fire transfer part 213 arranged in the radial direction is provided on the outer groove wall of the liquid receiving groove 212. A fire transfer channel 2131 arranged horizontally and higher than the bottom surface of the liquid receiving groove 212 is provided on the fire transfer part 213. The radially inner end of the fire transfer channel 2131 is communicated with the liquid receiving groove 212, and the fire transfer channel 2131 is communicated with the outer ring air chamber 202 through a plurality of ignition holes 2132. In this way, the fire transfer channel 2131 and the plurality of ignition holes 2132 are hidden in the fire transfer part 213, solving the problem that the existing fire transfer grooves or fire transfer channels are easily blocked. Since the fire transfer channel 2131 is arranged higher than the bottom surface of the liquid receiving groove 212, the overflow liquid in the liquid receiving groove 212 is effectively prevented from flowing into the fire transfer channel 2131, thereby avoiding the influence of the overflow liquid blocking the ignition holes on the fire transfer function.

[0060] A plurality of diversion grooves 214 arranged at intervals in the circumferential direction are opened on the outer groove wall of the liquid receiving groove 212. The radially inner end of the diversion groove 214 is communicated with the liquid receiving groove 212. In this embodiment, the diversion groove 214 is arranged with a larger radially inner end and a smaller radially outer end, and the bottom surface of the diversion groove 214 is inclined downward from the inside to the outside in the radial direction, so as to quickly discharge the overflow liquid from the pot collected in the diversion groove 214 outside the burner cap assembly 2. The liquid will not accumulate in the liquid receiving groove 212, nor will it block the inner ring fire holes, making the burner cap assembly 2 easy to clean.

[0061] Reference Figures 6-7, the burner further includes an ignition assembly 3. An ignition hole group is provided at the upper end of the outer side wall of the inner ring air chamber 201, and a brim 223 located above the ignition hole group and extending outward. The ignition hole group is composed of a plurality of ignition holes. The burner cap assembly 2 is provided with a through hole 215 vertically arranged directly below the brim 223. In this embodiment, the through hole 215 vertically penetrates the liquid storage tank 212 of the burner cap assembly 2, and the upper end surface of the through hole 215 is higher than the bottom surface of the liquid storage tank to prevent the overflow liquid in the liquid storage tank from flowing into the burner interior through the through hole 212. A vertical mounting hole 1102 is provided at the position of the burner head body 11 corresponding to the through hole 215. The upper end of the vertical mounting hole 1102 abuts against and communicates with the lower end of the through hole 215. The ignition assembly 3 is arranged directly below the brim 223, and sequentially passes through the through hole 215 and the vertical mounting hole 1102 vertically and is detachably connected to the burner head body 11. In this way, the ignition assembly 3 is hidden under the brim of the burner cap assembly 2, and dirt can be prevented from falling onto the head of the ignition assembly 3, affecting the ignition reliability.

[0062] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A burner head assembly, characterized in that, It includes a burner head body (11), and the burner head body (11) is provided with an inner premixing chamber (111) with an upward opening and an outer premixing chamber (112) with an upward opening. The outer premixing chamber (112) is located outside the inner premixing chamber (111) and the two are arranged adjacent to each other. The burner head body (11) is further provided with at least one outer ring air outlet (1131). The outer ring air outlet (1131) vertically penetrates the bottom surface of the outer premixing chamber (112), and its upper end is communicated with the outer premixing chamber (112). The upper end surface of the outer ring air outlet (1131) is higher than the bottom surface of the outer premixing chamber (112) and lower than the upper end surface of the outer premixing chamber (112).

2. The burner head assembly according to claim 1, characterized in that, The number of the outer ring air outlets (1131) is two, and the two outer ring air outlets (1131) are respectively arranged on the opposite outer sides of the inner premixing chamber (111).

3. The burner head assembly according to claim 1, characterized in that, The radially inner end of the outer ring air outlet (1131) is fixedly connected to the inner ring wall (1121) of the outer premixing chamber (112), and a gap for air flow is left between the radially outer end of the outer ring air outlet (1131) and the outer ring wall (1122) of the outer premixing chamber (112).

4. The burner head assembly according to claim 3, characterized in that, On the upper end of the side of the inner ring wall (1121) facing away from the inner premixing chamber (111), an outer annular boss (1123) is arranged along the circumferential direction. The top surface of the outer annular boss (1123) is flush with the upper end surface of the outer ring air outlet (1131); and / or the outer ring wall (1122) is recessed with a plurality of clearance parts (1124) arranged at intervals along the circumferential direction, and fixing holes (1101) are opened at the positions of the burner head body (11) corresponding to the clearance parts (1124).

5. A burner head assembly according to claim 1, wherein, At the position of the bottom of the burner head body (11) corresponding to the inner premixing chamber (111), an inner ring premixing head (1141) extending downward is fixedly provided, and the inner ring premixing head (1141) is communicated with the lower end of the inner premixing chamber (111); at the position of the bottom of the burner head body (11) corresponding to the outer ring air outlet (1131), an outer ring premixing head (1132) extending downward is fixedly provided, and the upper end of the outer ring premixing head (1132) is communicated with the lower end of the corresponding outer ring air outlet (1131).

6. The burner head assembly according to claim 5, characterized in that, Below the burner head body (11), a horizontally arranged inner ring straight pipe (1142) and a horizontally arranged outer ring straight pipe (1133) are provided. The inner ring straight pipe (1142) and the outer ring straight pipe (1133) are parallel and arranged in the same direction. The air outlet end of the outer ring straight pipe (1133) is communicated with the lower end of the inner ring premixing head (1141), and the air outlet end of the outer ring straight pipe (1133) is communicated with the lower end of the outer ring premixing head (1132).

7. The burner head assembly according to claim 1, characterized in that, On the top of the burner body (11), an upwardly extending upper positioning portion (1151) is fixedly provided. The upper positioning portion (1151) is located within the outer premixing chamber (112) and is arranged close to the inner premixing chamber (111). On the burner body (11), a vertical mounting hole (1102) is provided, and the vertical mounting hole (1102) penetrates through the top of the upper positioning portion (1151) and the bottom of the burner body (11) respectively.

8. The burner assembly according to claim 7, wherein At a position corresponding to the upper positioning portion (1151) at the bottom of the burner body (11), a downwardly extending lower mounting portion (1152) is fixedly provided. The lower end of the vertical mounting hole (1102) vertically penetrates through the lower mounting portion (1152), and a connecting hole (1103) with a downward opening is provided on the lower mounting portion (1152).

9. The burner head assembly according to claim 1, characterized in that, On the inner surface of the cavity wall at the upper end of the inner premixing chamber (111), an inner annular boss (1111) arranged in the circumferential direction is provided. The inner annular boss (1111) is higher than the upper end face of the outer ring air outlet (1131) and lower than the upper end face of the inner premixing chamber (111); and / or on the cavity wall of the inner premixing chamber (111), a vertical groove (1112) with an inward and upward opening is provided, and the vertical groove (1112) communicates with the inner premixing chamber (111).

10. A burner head assembly according to any one of claims 1-9, characterized in that, It further includes an ejector structure (12). The ejector structure (12) includes an inner ejector tube (121) and at least one outer ejector tube (122). The air outlet end of the inner ejector tube (121) communicates with the inner premixing chamber (111), and the outer ejector tube (122) is arranged in one-to-one correspondence with and communicates with the outer ring air outlet (1131).

11. A burner, characterized in that, Comprising: A burner cap assembly (2), which is provided with a downwardly opening inner ring air chamber (201) and an outer ring air chamber (202) with a downward opening and located outside the inner ring air chamber (201). At the top or the upper end of the outer side wall of the inner ring air chamber (201), a plurality of inner ring flame holes (221) located above the outer ring air chamber (202) are provided, and a plurality of outer ring flame holes (211) are opened on the outer side wall of the outer ring air chamber (202); And A burner head assembly as described in any one of claims 1 - 10. The burner head assembly is arranged at the bottom of the burner cap assembly (2). The inner premixing chamber (111) communicates with the inner ring flame holes (221) through the inner ring air chamber (201), the outer premixing chamber (112) communicates with the outer ring flame holes (211) through the outer ring air chamber (202), the outer ring air outlet (1131) is arranged towards the top of the outer ring air chamber (202), and a gap is left between the upper end face of the outer ring air outlet (1131) and the top of the outer ring air chamber (202).

12. A burner according to claim 11, characterized in that, On the top of the burner cap assembly (2), a liquid storage groove (212) with an upward opening and located outside the inner ring air chamber (201) is recessed. The outer ring air outlet (1131) is arranged directly below the bottom surface of the liquid storage groove (212), and a gap is left between the upper end face of the outer ring air outlet (1131) and the bottom surface of the liquid storage groove (212).

13. A burner according to claim 12, characterized in that, A fire-transferring part (213) arranged in the radial direction is provided on the outer tank wall of the liquid storage tank (212), and a fire-transferring channel (2131) which is arranged horizontally and is higher than the bottom surface of the liquid storage tank (212) is provided on the fire-transferring part (213). The fire-transferring channel (2131) is respectively communicated with the liquid storage tank (212) and the outer ring air chamber (202); and / or a plurality of diversion grooves (214) arranged at intervals in the circumferential direction are formed in the outer tank wall of the liquid storage tank (212), and the radially inner ends of the diversion grooves (214) are communicated with the liquid storage tank (212).

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