Fire cover structure and combustor thereof

Abstract

The utility model discloses a fire cover structure which comprises an outer fire cover, the outer fire cover is provided with an outer ring air chamber with a downward opening, a plurality of outer ring fire holes communicated with the outer ring air chamber are formed in the outer side wall of the outer fire cover, and a fire transferring part is arranged on the top of the outer fire cover in the radial direction. The outer fire cover is provided with a fire transferring part, the fire transferring part is provided with a transversely-arranged fire transferring channel, the fire transferring channel penetrates through the inner end face and the outer end face of the fire transferring part, the outer fire cover is further provided with a plurality of ignition holes located under the fire transferring part, and the upper ends and the lower ends of the ignition holes communicate with the fire transferring channel and the outer ring air chamber correspondingly. According to the fire cover structure, the fire transfer hole is hidden in the fire transfer channel, and the fire transfer performance is prevented from being affected due to blockage of the fire transfer hole. The utility model further discloses a burner.

Description

Technical Field

[0001] The utility model relates to the technical field of cookers, in particular to a burner cap structure and a burner thereof. Background Art

[0002] The outer ring burner cap and the inner ring burner cap of the existing burner adopt a split and double-ring concentric structure. In order to supplement the secondary air of the middle ring fire, a common method is to reserve a certain channel between the outer ring burner cap and the inner ring burner cap. The secondary air enters the channel through the bottom of the outer ring burner cap to supplement the secondary air inside the middle ring fire or the outer ring fire. However, the liquid overflowing from the pot will accumulate in the channel reserved for the middle ring fire and the outer ring fire or the secondary air channel, and the effect of easy cleaning cannot be achieved. At the same time, because the secondary air of the middle ring fire is insufficient, the firepower of the burner is relatively small, which cannot meet the demand for high-firepower stir-frying of domestic gas stoves.

[0003] The fire transfer holes or fire transfer grooves of the existing burner cap are exposed on the upper surface of the burner cap, and the problem of blockage is likely to occur. In addition, the height from the existing burner cap to the glass panel is more than 40 mm, and the height of the pot support is more than 62 mm, and the overall effect is relatively abrupt, affecting the beauty of the gas stove and the style matching of the whole machine and the home. 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 cap structure to hide the fire transfer holes in the fire transfer channels to prevent the blockage of the fire transfer holes from affecting the fire transfer performance. The utility model also provides a burner.

[0005] According to the provided burner cap structure, it is realized through the following technical solutions:

[0006] A burner cap structure includes an outer burner cap, the outer burner cap is provided with an outer ring air chamber with a downward opening, a plurality of outer ring fire holes communicated with the outer ring air chamber are opened on the outer side wall of the outer burner cap, a fire transfer part arranged in the radial direction on the top of the outer burner cap, a horizontally arranged fire transfer channel is arranged on the fire transfer part, the fire transfer channel respectively penetrates the inner end face and the outer end face of the fire transfer part, the outer burner cap is also provided with a plurality of ignition holes located directly below the fire transfer part, and the upper and lower ends of the ignition holes are respectively communicated with the fire transfer channel and the outer ring air chamber.

[0007] In some embodiments, the lowest point of the fire transfer channel is higher than the top of the outer burner cap, and / or the outer surface line type of the upper end of the fire transfer part is in an inverted "U" or inverted "V" shape.

[0008] In some embodiments, an upper mounting post extending upward and located directly above the outer ring air chamber is fixedly arranged on the top of the outer burner cap, and a through hole with an upward opening and communicated with the outer ring air chamber is opened on the upper mounting post.

[0009] In some embodiments, a downwardly extending lower mounting post is fixedly provided at a position on the top surface of the outer annular air chamber corresponding to the upper mounting post, and the lower end of the through hole vertically penetrates the lower mounting post.

[0010] In some embodiments, a liquid receiving groove that opens upward and is annular is provided at the top of the outer fire cap, and a plurality of diversion grooves that are circumferentially spaced and communicate with the liquid receiving groove are provided on the outer groove wall of the liquid receiving groove; the lower end of the flame transmission part horizontally penetrates the outer groove wall of the liquid receiving groove, the radially inner end of the flame transmission channel communicates with the liquid receiving groove, and the lowest point of the flame transmission channel is higher than the bottom surface of the liquid receiving groove.

[0011] In some embodiments, the outer groove wall of the liquid receiving groove has an upper surface and a radially inner side surface, the upper surface is connected to the bottom surface of the liquid receiving groove through the radially inner side surface, the upper surface is a flat surface or an upper inclined surface that slopes downward from the outside to the inside, and the radially inner side surface is a lower inclined surface that slopes downward from the outside to the inside; and / or the upper mounting post is arranged in the liquid receiving groove, and is in clearance fit or fixedly connected with the inner groove wall of the liquid receiving groove.

[0012] In some embodiments, the diversion grooves are arranged with a larger radially inner end and a smaller radially outer end, and / or the bottom surface of the diversion groove is arranged to slope downward from the inside to the outside.

[0013] In some embodiments, an inner fire cap is further included. A central air passage with openings at both upper and lower ends is provided at the central position of the outer fire cap. The inner fire cap is arranged on the top of the outer fire cap and has a central cavity that opens downward. The central cavity communicates with the central air passage to form an inner annular air chamber, and a plurality of inner annular fire holes that communicate with the inner annular air chamber are provided on the top or the outer side wall of the inner fire cap.

[0014] In some embodiments, the upper end of the central air passage protrudes upward from the top of the outer fire cap or the bottom surface of the liquid receiving groove, and / or a downwardly extending lower positioning block is fixedly provided at the bottom of the cavity wall of the central air passage.

[0015] In some embodiments, a brim that extends outward is fixedly provided at the outer edge of the top of the inner fire cap. The brim is located directly above the through hole of the outer fire cap. An ignition hole group is provided on the outer side wall of the inner fire cap. The ignition hole group is located below the brim and communicates with the inner annular air chamber; and / or the inner annular fire holes are provided on the outer side wall of the inner fire cap. An annular flange that extends outward is fixedly provided at the peripheral edge of the top of the inner fire cap. The radially outer end of the annular flange is located radially outside the outer end face of the inner annular fire holes.

[0016] In some embodiments, a concave cavity opening downward and outward is recessed in the outer sidewall of the inner fire cap. The concave cavity is located directly below the brim, and the ignition hole group is arranged on the cavity wall of the concave cavity and is in communication with the ignition hole group.

[0017] In some embodiments, it further includes an annular heat insulation plate. The heat insulation plate is arranged in the outer ring air chamber and is detachably connected to the outer fire cap. The radially outer end of the heat insulation plate abuts against or has a clearance fit with the outer sidewall of the outer ring air chamber, and there is a gap between the radially inner end of the heat insulation plate and the inner sidewall of the outer ring air chamber.

[0018] According to a burner provided above, it is realized through the following technical solutions:

[0019] A burner includes: a fire cap structure as described above; and a burner head assembly arranged at the bottom of the fire cap structure. The burner head assembly is provided with an outer pre-mixing cavity opening upward and at least one outer ring air outlet. The outer pre-mixing cavity is in communication with the outer ring air chamber. The outer ring air outlet vertically penetrates the bottom surface of the outer pre-mixing cavity and its upper end extends towards the top of the outer ring air chamber. There is a gap between the upper end surface of the outer ring air outlet and the top of the outer ring air chamber, and the outer ring air outlet is in communication with the outer pre-mixing cavity through the gap.

[0020] In some embodiments, it further includes an ignition assembly. A through hole is opened in the outer fire cap corresponding to the position of the outer pre-mixing cavity, and a vertical installation hole is opened in the burner head assembly corresponding to the position of the through hole. The ignition assembly vertically penetrates the through hole and the vertical installation hole and is detachably connected to the burner head assembly.

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

[0022] 1. For the fire cap structure of the present invention, by protruding a fire-transferring part and a plurality of pilot holes directly below the fire-transferring part on the top of the outer fire cap, and arranging a horizontally arranged fire-transferring channel on the fire-transferring part, the fire-transferring channel is in communication with the outer ring air chamber through the pilot holes, so that the fire-transferring holes are hidden in the fire-transferring channel, preventing the fire-transferring holes from being blocked and affecting the fire-transferring performance.

[0023] 2. By recessing a liquid-sump on the top of the outer fire cap, arranging a plurality of diversion grooves on the outer groove wall of the liquid-sump, the lower end of the fire-transferring part horizontally penetrates the outer groove wall of the liquid-sump, the radially inner end of the fire-transferring channel is in communication with the liquid-sump, and the lowest point of the fire-transferring channel is higher than the bottom surface of the liquid-sump. In this way, the liquid overflowing from the pot flows into the liquid-sump and then flows into the liquid tray from the liquid-sump, and the liquid will not accumulate in the liquid-sump, will not block the outer ring fire holes and the fire-transferring holes, making the fire cap structure have good cleanability and combustion stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the structural schematic diagram of the burner cap structure in Embodiment 1 of the present utility model Figure 1 ;

[0025] Figure 2 is the structural schematic diagram of the burner cap structure in Embodiment 1 of the present utility model Figure 2 ;

[0026] Figure 3 is the cross-sectional view of the burner cap structure in Embodiment 1 of the present utility model;

[0027] Figure 4 is the structural schematic diagram of the burner cap structure in Embodiment 2 of the present utility model;

[0028] Figure 5 is the structural schematic diagram of the burner cap structure in Embodiment 3 of the present utility model;

[0029] Figure 6 is the cross-sectional view of the burner cap structure in Embodiment 3 of the present utility model;

[0030] Figure 7 is the structural schematic diagram of the inner burner cap in Embodiment 3 of the present utility model;

[0031] Figure 8 is the structural schematic diagram of the burner cap structure in Embodiment 4 of the present utility model;

[0032] Figure 9 is the cross-sectional view of the burner cap structure in Embodiment 4 of the present utility model;

[0033] Figure 10 is the explosion diagram of the burner in Embodiment 5 of the present utility model;

[0034] Figure 11 is the structural schematic diagram of the burner structure in Embodiment 5 of the present utility model;

[0035] Figure 12 is the cross-section of the burner in Embodiment 5 of the present utility model Figure 1 ;

[0036] Figure 13 is the cross-section of the burner in Embodiment 5 of the present utility model Figure 2 ;

[0037] Figure 14 is the structural schematic diagram of the burner head assembly in Embodiment 5 of the present utility model;

[0038] Figure 15 is the cross-sectional view of the burner in Embodiment 6 of the present utility model.

[0039] In the figure: 1 - burner head assembly, 1101 - fixing hole, 1102 - vertical mounting 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, 1151 - upper positioning part;

[0040] 2 - burner cap structure, 201 - inner ring gas chamber, 202 - outer ring gas chamber, 21 - outer burner cap, 210 - central air passage, 211 - outer ring flame holes, 212 - liquid receiving groove, 2121 - upper surface, 2122 - radially inner side surface, 213 - flame transmission part, 2131 - flame transmission channel, 2132 - ignition hole, 214 - diversion groove, 215 - through hole, 2161 - upper mounting post, 2162 - lower mounting post, 2171 - lower positioning block, 2172 - upper positioning block, 2173 - annular step, 218 - fixing post, 22 - inner burner cap, 220 - central cavity, 221 - inner ring flame holes, 222 - ignition hole, 223 - brim, 224 - annular flange, 225 - inner flame stabilizing ring, 226 - concave cavity, 227 - positioning notch, 23 - heat insulation plate, 24 - connecting piece;

[0041] 3 - ignition assembly. Specific embodiments

[0042] The following embodiments are used to 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.

[0043] Embodiment 1

[0044] Reference Figures 1-3, this embodiment provides a burner cap structure. The burner cap structure includes an outer burner cap 21, which is provided with a central air passage 210 with openings at both the upper and lower ends, and an outer ring air chamber 202 with a downward opening and located outside the central air passage 210. A plurality of outer ring fire holes 211 communicating with the outer ring air chamber 202 are formed on the outer side wall of the outer burner cap 21. At the position corresponding to the outer ring air chamber 202 on the top of the outer burner cap 21, a fire transfer part 213 extending upward and arranged in the radial direction is convexly provided. A fire transfer passage 2131 arranged horizontally is provided on the fire transfer part 213. The fire transfer passage 2131 penetrates through the inner end face and the outer end face of the fire transfer part 213 in the radial direction, and the outer end of the radial direction of the fire transfer passage 2131 is located between two adjacent central air passages 210. A plurality of ignition holes 2132 located directly below the fire transfer part 213 are further provided on the outer burner cap 21. The plurality of ignition holes 2132 are arranged at intervals in the radial direction. The upper and lower ends of each ignition hole 2132 are respectively communicated with the fire transfer passage 2131 and the outer ring air chamber 202.

[0045] When the outer ring mixed gas in the outer ring air chamber 202 flows upward through the ignition holes 2132 and accumulates in the fire transfer passage 2131, when this part of the outer ring mixed gas encounters a fire source, it is quickly ignited, and then the flame quickly spreads to the outer ring fire holes 211 of the outer burner cap 21 along the fire transfer passage 2131, so that the outer ring fire of the outer burner cap is ignited.

[0046] It can be seen that compared with the existing burner caps in which the fire transfer holes or fire transfer grooves are exposed on the upper surface of the burner cap, in this utility model, a fire transfer part 213 arranged in the radial direction is convexly provided on the top of the outer burner cap 21, a fire transfer passage 2131 arranged horizontally is provided on the fire transfer part, and a plurality of ignition holes 2132 located directly below the fire transfer part 213 are provided on the outer burner cap 21. The upper and lower ends of the ignition holes 2132 are respectively communicated with the fire transfer passage 2131 and the outer ring air chamber 202. In this way, the fire transfer holes are hidden in the fire transfer passage, preventing the fire transfer holes from being blocked and affecting the fire transfer performance.

[0047] Specifically, the outer surface line type of the upper end of the fire transfer part 213 is in an inverted "U" or inverted "V" shape. In this embodiment, the outer surface line type of the upper end of the fire transfer part 213 is in an inverted "U" shape (see Figure 1 ), so that when the overflow liquid drips onto the fire transfer part 213, it can only flow downward quickly along the outer surface of the fire transfer part 213, preventing the overflow liquid from accumulating on the fire transfer part 213.

[0048] Reference Figures 1-3, Further, the top of the outer burner cap 21 is provided with an upwardly opening and annular liquid holding groove 212, and the liquid holding groove 212 is located outside the central air passage 210. A plurality of diversion grooves 214 are circumferentially spaced on the outer groove wall of the liquid holding groove 212. The plurality of diversion grooves 214 divide the outer groove wall of the liquid holding groove 212 into several parts. The radially inner end of the diversion groove 214 communicates with the liquid holding groove 212, and the radially outer end of the diversion groove 214 communicates with the outside atmosphere of the outer burner cap 21. In this way, the overflow liquid flows into the liquid holding groove and then flows from the liquid holding groove to the liquid receiving tray, and the liquid will not accumulate in the liquid holding groove, making the outer burner cap easy to clean. The lower end of the flame transfer part 213 horizontally penetrates the outer groove wall of the liquid holding groove 212 in the radial direction, and the upper end of the flame transfer part 213 protrudes from the upper end surface of the outer side wall of the liquid holding groove. The radially inner end of the flame transfer passage 2131 communicates with the liquid holding groove 212, and the lowest point of the flame transfer passage 2131 is higher than the bottom surface of the liquid holding groove 212. In this way, while reducing the overall height of the outer burner cap, it is ensured that after the overflow liquid flows into the liquid holding groove 212, it will not flow into the flame transfer through hole and block the ignition hole.

[0049] In this embodiment, the plurality of diversion grooves 214 and the flame transfer part 213 are circumferentially and evenly distributed along the outer groove wall of the liquid holding groove 212. A plurality of flame avoidance positions (not shown in the figure) are circumferentially spaced on the outer side wall of the outer burner cap 21. The plurality of flame avoidance positions are arranged in one-to-one correspondence with the plurality of diversion grooves 214. The radially outer end of each diversion groove 214 is arranged corresponding to the corresponding flame avoidance position. In this way, when the overflow liquid flows along the liquid holding groove to the liquid receiving tray, it will not block the outer ring fire holes, so that the burner cap structure has good cleanability and combustion stability.

[0050] Reference Figure 3 , Specifically, the outer groove wall of the liquid holding groove 212 has an upper surface 2121 and a radially inner side surface 2122. The upper surface 2121 is connected to the bottom surface of the liquid holding groove 212 through the radially inner side surface 2122. The upper surface 2121 is a plane or an upper inclined surface that slopes downward from the outside to the inside. The radially inner side surface 2122 is a lower inclined surface that slopes downward from the outside to the inside. In this embodiment, the upper surface 2121 is an upper inclined surface, and the slope of the lower inclined surface is greater than the slope of the upper inclined surface. Thus, the overflow liquid can smoothly flow into the liquid holding groove 212 along the upper surface 2121 and the radially inner side surface 2122 without forming dead corners, so that the overflow liquid will not accumulate on the outer groove wall of the liquid holding groove 212, but is collected in the liquid holding groove 212 and then flows into the liquid receiving tray of the gas stove through the diversion groove 214.

[0051] Specifically, the width of the diversion groove 214 in the radial direction is greater than 5 mm. The diversion groove 214 is arranged with a larger radially inner end and a smaller radially outer end. The bottom surface of the diversion groove 214 is arranged to slope downward from the inside to the outside. In this way, the overflow liquid in the liquid holding groove 212 can smoothly flow into the liquid receiving tray of the gas stove through the diversion groove 214, preventing the overflow liquid from accumulating in the liquid holding groove or the diversion groove.

[0052] Reference Figures 1-3 , further, an upper mounting post 2161 extending upward and located directly above the outer ring air chamber 202 is fixedly provided on the radial inner side of the top of the outer burner cap 21. In this embodiment, the upper mounting post 2161 is arranged in the liquid storage groove 212 and protrudes from the bottom surface of the liquid storage groove. The lower end of the upper mounting post is integrally formed with the bottom surface of the liquid storage groove 212, and the radial inner end is fixedly connected to the inner groove wall of the liquid storage groove 212 as a whole. Of course, the upper mounting post can also be designed to have a clearance fit with the inner groove wall of the liquid storage groove. A through hole 215 with an upward opening is formed in the upper mounting post 2161. The lower end of the through hole 215 extends downward into the outer ring air chamber and is communicated with the outer ring air chamber 202 for the ignition assembly to pass through vertically. Since the upper mounting post 2161 protrudes from the bottom surface of the liquid storage groove 212, it can effectively prevent the overflow liquid in the liquid storage groove from flowing into the through hole, thereby avoiding polluting the ignition assembly or flowing into the outer burner cap.

[0053] Furthermore, a lower mounting post 2162 extending downward is integrally formed at the position corresponding to the upper mounting post 2161 on the top surface of the outer ring air chamber 202. The lower end of the through hole 215 vertically penetrates the lower mounting post 2162. Reference Figure 2 , so through the setting of the lower mounting post, on the one hand, the strength of the outer burner cap is enhanced, and on the other hand, the ignition assembly is separated from the outer ring mixed gas in the outer ring air chamber.

[0054] Reference Figures 1-3 , in this embodiment, the central air passage 210 is used for the inner ring mixed gas to pass through. When the inner burner cap is covered on the top of the central air passage of the outer burner cap, the upper end of the central air passage is communicated with the central cavity of the inner burner cap 22 to form an inner ring air chamber. At this time, there is no passage for secondary air to pass through between the burner caps (that is, between the inner and outer burner caps), and the overflow liquid will not accumulate between the inner and outer burner caps, so that the burner cap structure has good easy-to-clean performance.

[0055] Specifically, the upper end of the central air passage 210 protrudes upward beyond the top of the outer burner cap 21 or the bottom surface of the liquid holding groove 212. In this embodiment, the upper end of the central air passage 210 protrudes upward beyond the bottom surface of the liquid holding groove 212. At this time, the outer side wall of the upper end of the central air passage 210 constitutes the inner groove wall of the liquid holding groove 212. Since the upper end surface of the central air passage 210 is higher than the bottom surface of the liquid holding groove 212, it can prevent the overflow liquid in the liquid holding groove 212 from flowing into the burner cap structure through the central air passage 210. A downward extending lower positioning block 2171 is integrally formed at the bottom of the cavity wall of the central air passage 210. The lower positioning block 2171 is used to pre-position the burner cap structure on the burner head assembly in the burner to prevent the burner cap structure from rotating circumferentially relative to the burner head assembly. In addition, an annular step 2173 arranged in the circumferential direction is provided at the upper end of the inner surface of the cavity wall of the central air passage 210. This annular step can be used for lower limiting the inner burner cap. An upper positioning block 2172 is provided at the upper end of the inner surface of the cavity wall of the central air passage 210. The upper positioning block 2172 is located above the annular step and is used for circumferential limiting of the inner burner cap.

[0056] Reference Figures 2-3 , Further, a plurality of fixing columns 218 arranged at intervals in the circumferential direction are integrally formed on the outer side wall of the outer ring air chamber 202. The fixing columns 218 are located inside the outer ring air chamber and are used to connect and fix the heat insulation plate so that the heat insulation plate is detachably connected to the outer burner cap as a whole. Of course, the fixing columns 218 can also be omitted.

[0057] Embodiment 2

[0058] Reference Figure 4 , The difference between this embodiment and Embodiment 1 is that the liquid holding groove 212 recessed in the top of the outer burner cap 21 is omitted, and at this time, the top of the outer burner cap 21 is a flat surface. In this embodiment, the top of the central air passage 210, the lowest point of the flame transfer passage 2131, and the top of the upper mounting post 2161 are all designed to be higher than the top of the outer burner cap 21.

[0059] Specifically, the upper end of the central air passage 210 protrudes upward beyond the top of the outer burner cap 21 so that the upper end surface of the central air passage 210 is higher than the top of the outer burner cap. In this way, when the overflow liquid drips onto the upper surface of the outer burner cap 21, it will not flow into the inside of the outer burner cap through the central air passage 210, and thus will not flow into the inside of the burner, making the burner easy to clean.

[0060] The lowest point of the flame transfer passage 2131 is designed to be higher than the top of the outer burner cap 21. In this way, while hiding the flame transfer holes, it is ensured that when the overflow liquid flows onto the upper surface of the outer burner cap 2, it will not flow into the flame transfer through hole 2131 to block the ignition hole 2132, effectively preventing the ignition hole from being blocked and affecting the flame transfer function, and at the same time preventing the overflow liquid from flowing into the outer burner cap through the ignition hole 2132.

[0061] The upper end of the upper mounting post 2161 protrudes upward above the top of the outer burner cap 21, so that the upper end face of the upper mounting post 2161 is higher than the top of the outer burner cap. At this time, the overflow liquid on the upper surface of the outer burner cap 21 flows into the through hole 215 of the upper mounting post 2161, preventing the overflow liquid from contaminating the ignition assembly 3 or flowing into the inside of the outer burner cap 21.

[0062] Embodiment 3

[0063] Reference Figures 5-7 , the difference between this embodiment and Embodiment 1 or 2 is that the burner cap structure further includes an inner burner cap 22. The inner burner cap 22 is arranged on the top of the outer burner cap 21 and has a central cavity 220 with a downward opening. The central cavity 220 is communicated with the central air passage 210 to form an inner ring air chamber 201. A plurality of inner ring fire holes 221 communicated with the inner ring air chamber 201 are arranged on the top or the outer side wall of the inner burner cap 22. In this way, there is no secondary air passage between the inner and outer burner caps, and the overflow liquid will not accumulate between the inner and outer burner caps. Thus, while the burner cap structure meets the requirements of the inner ring fire and the outer ring fire, it has good easy-to-clean performance.

[0064] In this embodiment, the inner burner cap 22 is detachably placed on the top of the outer burner cap 21. The inner burner cap 22 is hermetically connected to the upper end face (the sealing plane of the outer burner cap) of the central air passage 210 to prevent air leakage at the connection. The top of the inner burner cap is slightly higher than the highest point of the top of the outer burner cap. The outer side wall of the inner burner cap 22 and the outer side wall of the upper end of the central air passage 210 together form the inner tank wall of the liquid receiving tank 212. A positioning structure is provided between the outer burner cap 21 and the inner burner cap 22. The positioning structure includes a mating upper positioning block 2172 and a mounting notch 227. The upper positioning block 2172 is integrally formed on the inner surface of the cavity wall of the central air passage 210 at the upper end, and the mounting notch 227 is opened at the lower end of the cavity wall of the central cavity 220 (see Figure 7 ). In this way, with the cooperation of the upper positioning block and the mounting notch, the inner burner cap can be quickly positioned on the outer burner cap, and the inner burner cap can be prevented from rotating circumferentially relative to the outer burner cap. It should be noted in particular that the inner burner cap can be designed to be integrally formed with the outer burner cap.

[0065] Reference Figures 6-7, Further, a brim 223 extending outward is fixedly provided at the top outer edge of the inner burner cap 22. The brim 223 is directly above the through hole 215 of the outer burner cap 21. An ignition hole group is provided at the position on the outer sidewall of the inner burner cap 22 corresponding to the brim 223. The ignition hole group is located below the brim 223 and communicates with the inner ring air chamber 201. In this embodiment, a concave cavity 226 opening downward and outward is recessed at the position on the outer sidewall of the inner burner cap 22 corresponding to the brim 223. The concave cavity is directly below the brim and is used to provide an installation space for the ignition assembly, so as to install the upper end of the ignition assembly in the concave cavity and hide it directly below the brim, solving the problem of the exposure of the ignition assembly and preventing dirt from dripping onto the head of the ignition assembly and affecting the ignition reliability. The ignition hole group is arranged on the cavity wall of the concave cavity 226 and is composed of a plurality of ignition holes 222. The opposite ends of each ignition hole 222 are respectively communicated with the concave cavity and the inner ring air chamber.

[0066] In this embodiment, a plurality of inner ring fire holes 221 are circumferentially spaced on the outer sidewall of the inner burner cap 22 and are higher than the bottom surface of the liquid storage groove 212, so as to ensure that the inner ring fire holes will not be blocked even when there is a large amount of overflow liquid in the liquid storage tray 212. An annular flange 224 extending outward is integrally formed on the peripheral edge of the top of the inner burner cap 22. The radially outer end of the annular flange 224 is located radially outside the outer end face of the inner ring fire hole 221, so that the annular flange can prevent overflow liquid or impurities from dripping onto the inner ring fire hole and blocking the fire hole. In addition, an inner flame stabilizing ring 225 arranged in the circumferential direction is provided on the outer sidewall of the inner burner cap 22. The inner flame stabilizing ring is located between the annular flange 224 and the inner ring fire hole 221 and communicates with the inner ring air chamber 201 to improve the combustion stability of the inner ring flame.

[0067] Embodiment 4

[0068] Reference Figures 8-9 , The difference between this embodiment and Embodiment 1 or 2 or 3 is that the burner cap structure further includes an annular heat insulation plate 23. The heat insulation plate 23 is made of stainless steel or mica plate. The heat insulation plate 23 is arranged in the outer ring air chamber 202 and is detachably connected to the outer burner cap 21. The radially outer end of the heat insulation plate 23 abuts against or has a clearance fit with the outer sidewall of the outer ring air chamber 202, and a gap for air flow is left between the radially inner end of the heat insulation plate 23 and the inner sidewall of the outer ring air chamber 202. In this embodiment, the heat insulation plate 23 is detachably connected to the fixing column 218 on the outer burner cap 21 through a connecting member 24 (such as a screw). Of course, the connecting member can also be designed into other structures, such as a snap structure.

[0069] When the burner cap structure is placed on the burner head assembly, the heat insulation plate 23 is clamped between the burner head body 11 of the burner head assembly and the fixing posts of the outer burner cap 21. At this time, the heat insulation plate 23 is in sealing contact with the sealing plane of the burner head body 11, achieving a sealing effect to prevent air leakage between the outer burner cap and the burner head assembly. At the same time, it can also play a heat insulation effect, reducing the downward conduction of the high-temperature heat on the outer burner cap to the burner head assembly, thereby facilitating the reduction of the temperature rise of the burner head assembly.

[0070] Embodiment 5

[0071] Reference Figures 10-14 , this embodiment provides a burner, which includes a burner head assembly 1 and a burner cap structure as described in any one of Embodiments 3 or 4, and the burner cap structure is placed on the top of the burner head assembly 1.

[0072] Taking the burner cap structure including an outer burner cap 21, an inner burner cap 22 and a heat insulation plate 23 as an example in this embodiment, the inner burner cap 22 is covered on the top of the outer burner cap, and the heat insulation plate 23 is detachably installed in the outer ring air chamber of the outer burner cap 21 through a connecting member 24. The burner head assembly 1 includes a burner head body 11, which is provided with an upwardly open inner premixing chamber 111, an upwardly open outer premixing chamber 112 and at least one outer ring air outlet 1131. The inner premixing chamber 111 is communicated with the inner ring air chamber of the burner cap structure, and the outer premixing chamber 112 is located outside the inner premixing chamber 111 and is communicated with the outer ring air chamber 202. In this embodiment, the inner premixing chamber 111 and the outer premixing chamber 112 are arranged adjacent to each other. At this time, the inner ring wall 1121 of the outer premixing chamber 112 serves as the chamber wall of the inner premixing chamber 111. There is no upwardly open air chamber between the inner premixing chamber 111 and the outer premixing chamber 112, and of course there is no transverse secondary channel communicated with the air chamber. Compared with the existing burner head with a secondary air channel and an air chamber, the secondary air channel and the air chamber are omitted, which is beneficial to reducing the width and height of the burner head body 11, preventing the liquid overflowing from the pot from accumulating in the burner head body, and making the burner head assembly 1 easy to clean.

[0073] The outer ring air outlet 1131 vertically penetrates the bottom surface of the outer pre-mixing chamber 112, and its upper end extends towards the top of the outer ring air chamber 202. A gap H for the airflow to pass through is left between the upper end surface of the outer ring air outlet 1131 and the top of the outer ring air chamber 202. The outer ring air outlet 1131 is connected to the outer pre-mixing chamber 112 through this gap H. When the outer ring mixed gas flows upward from the outer ring air outlet 1131, the gas at this time still has a certain outlet velocity. If this part of the gas directly flows upward from the outer burner cap, there will be a problem of relatively long local flames. To solve this problem, the outer ring air outlet 1131 is designed to extend towards the top of the outer ring air chamber 202. The flow direction of the gas is changed through the gap H between the ring air outlet 1131 and the top of the outer ring air chamber 202, which is also conducive to further mixing of the outer ring mixed gas, ensuring uniform mixing of the fuel gas and air, and then flowing out from the outer ring fire holes on the outer side wall of the outer burner cap 21, preventing the problem of relatively long local flames and improving the performance of the burner.

[0074] Reference Figure 14 , 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 pre-mixing chamber 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 pre-mixing chamber 111, and is used for the lower limit position of the radial inner side of the burner cap structure. A vertical groove 1112 opening inward and upward is provided on the cavity wall of the inner pre-mixing chamber 111. The vertical groove 1112 is connected to the inner pre-mixing chamber 111 and is used for limiting and fixing the outer burner cap 21 in the burner cap structure to prevent the burner cap structure from rotating circumferentially relative to the burner head body 11.

[0075] Reference Figure 10 Or Figure 14 , 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 pre-mixing chamber 111. This is conducive to increasing the unit air outlet area, facilitating the outer ring mixed gas to quickly and evenly fill the outer pre-mixing chamber 112, and at the same time ensuring that the outer ring mixed gases do not interfere with each other when flowing upward from the outer ring air outlet 113.

[0076] Specifically, the radially inner end of the outer ring air outlet 1131 is fixedly connected to the inner ring wall 1121 of the outer pre-mixing chamber 112, so that the outer ring air outlet 1131 is close to the inner pre-mixing chamber 111. This not only helps to reduce the width of the burner body 11 in the radial direction, but also helps to increase the distance between the radially inner side of the outer ring air outlet 1131 and the outer ring flame holes on the outer side wall of the outer burner cap 21, 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 air outlet 1131, make the mixing of the outer ring mixed gas more uniform, and improve the combustion efficiency. A spacing for the air flow to pass through is left between the radially outer end of the outer ring air 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 air outlet 1131 and the outer ring flame holes on the outer side wall of the outer burner cap 21, to prevent the outer ring mixed gas flowing upward from the radially outer side of the outer ring air outlet 1131 from directly flowing to the outer ring flame holes of the outer burner cap 21 and avoid the problem of longer local flames.

[0077] Reference Figure 14 , specifically, an outer annular boss 1123 arranged in the circumferential direction is provided at the upper end of the inner ring wall 1121 on the side facing away from the inner pre-mixing chamber 111. The top surface of the outer annular boss 1123 is flush with the upper end surface of the outer ring air outlet 1131 to simplify the processing and manufacturing process. The outer ring wall 1122 is recessed with a plurality of clearance parts 1124 opening outward and upward. The plurality of clearance parts 1124 are arranged at equal intervals along 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 opened at the position of the burner body 11 corresponding to the clearance part 1124. The fixing hole 1101 is used for fixedly connecting the liquid receiving tray.

[0078] Reference Figures 10-14 , further, the burner further includes an ignition assembly 3. A through hole 215 for the ignition assembly to pass through is opened at the position of the outer burner cap 21 corresponding to the outer pre-mixing chamber 112. A vertical installation hole 1102 is opened at the position of the burner body 11 of the burner assembly 1 corresponding to the through hole 215. The ignition assembly 3 is vertically inserted through the through hole 215 and the vertical installation hole 1102 and is detachably connected to the burner assembly 1.

[0079] Specifically, an upwardly extending upper positioning portion 1151 is fixedly provided on the top of the burner head body 11. The upper positioning portion 1151 is located within 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. 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, for the ignition assembly 3 to pass through vertically. At the position corresponding to the upper positioning portion 1151 on the outer flame cover 21, a downwardly extending lower installation post 2162 is fixedly provided. The lower installation post 2162 is hermetically connected to the upper positioning portion 1151. In this embodiment, the bottom surface of the lower installation post 2162 forms a sealed planar contact with the top surface of the upper positioning portion 1151. A through hole 215 communicating with the vertical installation hole 1102 is provided on the lower installation post 2162. Thus, one end of the ignition assembly 3 located between the burner head assembly 1 and the outer flame cover 21 is surrounded by the lower installation post 2162 and the upper positioning portion 1151. On the one hand, it avoids the ignition assembly 3 from contacting the outer ring mixed gas. On the other hand, even if there is overflow liquid flowing into the through hole of the outer flame cover 21, this part of the overflow liquid will only flow directly downward through the vertical installation hole into the lower end of the burner head assembly 1, and will not accumulate inside the burner head assembly 1 or the outer flame cover 21.

[0080] More specifically, at the position corresponding to the upper positioning portion 1151 on the bottom of the burner head body 11, a downwardly extending lower installation portion 1152 is fixedly provided. 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. The ignition assembly 3 is vertically disposed in the lower installation portion 1152 and is detachably connected to the lower installation portion 1152 by screws.

[0081] Embodiment 6

[0082] Reference Figure 15 , the difference between this embodiment and Embodiment 5 is that the heat insulation plate 23 and the connecting member 24 are omitted from the flame cover structure. At this time, the flame cover structure includes the outer flame cover 21 and the inner flame cover 22. The outer flame cover 21 forms a sealed planar contact with the burner head body 11 of the burner head assembly 1. Thus, compared with Embodiment 5, the overall structure of the burner is simpler and the manufacturing cost is lower.

[0083] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the creative concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A burner cap structure, characterized in that, It includes an outer burner cap (21), and the outer burner cap (21) is provided with an outer ring air chamber (202) with a downward opening. A plurality of outer ring fire holes (211) communicating with the outer ring air chamber (202) are formed on the outer side wall of the outer burner cap (21). A fire transfer part (213) arranged in the radial direction on the top of the outer burner cap (21), and a horizontally arranged fire transfer channel (2131) is provided on the fire transfer part (213). The fire transfer channel (2131) penetrates through the inner end face and the outer end face of the fire transfer part (213) respectively. The outer burner cap (21) is further provided with a plurality of ignition holes (2132) located directly below the fire transfer part (213). The upper and lower ends of the ignition holes (2132) are respectively communicated with the fire transfer channel (2131) and the outer ring air chamber (202).

2. The burner cap structure according to claim 1, characterized in that, The lowest point of the fire transfer channel (2131) is higher than the top of the outer burner cap (21), and / or the outer surface line type at the upper end of the fire transfer part (213) is in an inverted "U" or inverted "V" shape.

3. A burner cap structure according to claim 1, characterized in that, An upper mounting post (2161) extending upward and located directly above the outer ring air chamber (202) is fixedly arranged on the top of the outer burner cap (21). A through hole (215) with an upward opening and communicating with the outer ring air chamber (202) is formed in the upper mounting post (2161).

4. A burner cap structure according to claim 3, characterized in that, A lower mounting post (2162) extending downward is fixedly arranged at a position corresponding to the upper mounting post (2161) on the top surface of the outer ring air chamber (202). The lower end of the through hole (215) vertically penetrates through the lower mounting post (2162).

5. A burner cap structure according to claim 1, characterized in that, A liquid receiving groove (212) with an upward opening and in a ring shape is provided on the top of the outer burner cap (21). A plurality of diversion grooves (214) which are circumferentially spaced and communicate with the liquid receiving groove (212) are provided on the outer groove wall of the liquid receiving groove (212); the lower end of the fire transfer part (213) horizontally penetrates through the outer groove wall of the liquid receiving groove (212). The radially inner end of the fire transfer channel (2131) is communicated with the liquid receiving groove (212), and the lowest point of the fire transfer channel (2131) is higher than the groove bottom surface of the liquid receiving groove (212).

6. A burner cap structure according to claim 5, characterized in that, The outer groove wall of the liquid receiving groove (212) has an upper surface (2121) and a radially inner side surface (2122). The upper surface (2121) is connected to the groove bottom surface of the liquid receiving groove (212) through the radially inner side surface (2122). The upper surface (2121) is a plane or an upper inclined surface which slopes downward from the outside to the inside. The radially inner side surface (2122) is a lower inclined surface which slopes downward from the outside to the inside; and / or the upper mounting post (2161) is arranged in the liquid receiving groove (212), and is in clearance fit or fixedly connected with the inner groove wall of the liquid receiving groove (212).

7. The burner cap structure according to claim 5, characterized in that, The diversion grooves (214) are arranged with a larger radially inner end and a smaller radially outer end, and / or the groove bottom surface of the diversion grooves (214) is arranged to slope downward from the inside to the outside.

8. A burner cap structure according to claim 1, characterized in that, It further includes an inner burner cap (22). A central air passage (210) with openings at both upper and lower ends is provided at the central position of the outer burner cap (21). The inner burner cap (22) is disposed on the top of the outer burner cap (21) and has a central cavity (220) with a downward opening. The central cavity (220) is communicated with the central air passage (210) to form an inner annular air chamber (201). A plurality of inner annular flame holes (221) communicated with the inner annular air chamber (201) are provided on the top or the outer side wall of the inner burner cap (22).

9. A burner cap structure according to claim 8, characterized in that, The upper end of the central air passage (210) protrudes upward beyond the top of the outer burner cap (21) or the bottom surface of the liquid holding tank (212), and / or a downward extending lower positioning block (2171) is fixedly provided at the bottom of the cavity wall of the central air passage (210).

10. A burner cap structure according to claim 8, characterized in that, A brim (223) extending outward is fixedly provided at the outer edge of the top of the inner burner cap (22). The brim (223) is located directly above the through hole (215) of the outer burner cap (21). An ignition hole group is provided on the outer side wall of the inner burner cap (22). The ignition hole group is located below the brim (223) and is communicated with the inner annular air chamber (201); and / or the inner annular flame holes (221) are provided on the outer side wall of the inner burner cap (22). An annular flange (224) extending outward is fixedly provided at the peripheral edge of the top of the inner burner cap (22). The radially outer end of the annular flange (224) is located radially outside the outer end face of the inner annular flame holes (221).

11. A burner cap structure according to claim 10, characterized in that, A concave cavity (226) opening downward and outward is recessed on the outer side wall of the inner burner cap (22). The concave cavity (226) is located directly below the brim (223). The ignition hole group is provided on the cavity wall of the concave cavity (226) and is communicated with the ignition hole group.

12. A burner cap structure according to any one of claims 1-11, characterized in that, It further includes an annular heat insulation plate (23). The heat insulation plate (23) is disposed in the outer annular air chamber (202) and is detachably connected to the outer burner cap (21). The radially outer end of the heat insulation plate (23) abuts against or is in clearance fit with the outer side wall of the outer annular air chamber (202). A gap is left between the radially inner end of the heat insulation plate (23) and the inner side wall of the outer annular air chamber (202).

13. A burner, characterized in that, Comprising: A burner cap structure according to any one of claims 1 - 12; A burner head assembly (1) is disposed at the bottom of the burner cap structure. The burner head assembly (1) is provided with an outer pre - mixing chamber (112) with an upward opening and at least one outer annular air outlet (1131). The outer pre - mixing chamber (112) is communicated with the outer annular air chamber (202). The outer annular air outlet (1131) vertically penetrates the bottom surface of the outer pre - mixing chamber (112) and its upper end extends toward the top of the outer annular air chamber (202). A gap is left between the upper end face of the outer annular air outlet (1131) and the top of the outer annular air chamber (202). The outer annular air outlet (1131) is communicated with the outer pre - mixing chamber (112) through the gap.

14. A burner according to claim 13, characterized in that, It further includes an ignition component (3). A through hole (215) is formed at a position of the outer fire cover (21) corresponding to the outer premixing cavity (112). A vertical mounting hole (1102) is formed at a position of the burner head assembly (1) corresponding to the through hole (215). The ignition component (3) is vertically inserted through the through hole (215) and the vertical mounting hole (1102) and is detachably connected to the burner head assembly (1).

Images