Inner fire cover, fire cover assembly and combustor thereof

Abstract

The utility model discloses an inner fire cover, a fire cover assembly and a combustor, the inner fire cover comprises a surrounding plate, the surrounding plate is in a circular truncated cone shape with a big lower end and a small upper end, and an inner fire hole group is arranged on the surrounding plate; the top plate is fixedly connected to the upper end or the top of the surrounding plate, the top plate and the surrounding plate jointly define an inner ring cavity with a downward opening, and the inner ring cavity communicates with the inner fire hole set; the ignition boss comprises a transverse section and a vertical section which are fixedly connected into a 7 shape, the transverse section is fixedly connected with the outer side wall face of the surrounding plate through the vertical section, and a plurality of ignition holes communicated with the inner ring cavity are formed in the face, away from the top plate, of the vertical section. According to the inner fire cover, the height of the inner fire cover in the vertical direction is reduced, the ultra-thin requirement is met, and meanwhile the ignition needle can be effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of gas stoves, in particular to an inner burner head, a burner head assembly and a burner thereof Background Art

[0002] In order to meet the requirements of high-firepower combustion, flame uniformity and firepower adjustment, the outer burner head and the inner burner head of the existing cooker burner adopt a split-type and double-ring concentric structure. The common existing method for supplementing secondary air is to reserve a certain channel between the outer burner head and the inner burner head, and the secondary air enters the channel through the bottom of the outer burner head. However, since the channel is in an exposed state, the liquid overflowing from the pot will directly flow downward and accumulate in the channel, making it very difficult to clean

[0003] The height of the burner head of the existing burner is usually relatively high. The height from it to the glass panel is more than 40 mm, and the height of the pot support is more than 62 mm. The overall effect is relatively prominent, affecting the aesthetics of the gas stove and the style matching of the whole household 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 an inner burner head, which reduces the height of the inner burner head in the vertical direction and can effectively protect the ignition needle. The utility model also provides a burner head assembly and a burner

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

[0006] An inner burner head, comprising: a surrounding plate, the surrounding plate is in the shape of a frustum of a cone with a larger lower end and a smaller upper end, and an inner fire hole group is provided on the surrounding plate; a top plate, fixedly connected to the upper end or the top of the surrounding plate, the top plate and the surrounding plate jointly enclose an inner ring cavity opening downward, and the inner ring cavity is communicated with the inner fire hole group; and an ignition boss, including a horizontal section and a vertical section fixedly connected into a "7" shape, the horizontal section is fixedly connected to the outer side wall surface of the surrounding plate through the vertical section, and a plurality of ignition holes communicated with the inner ring cavity are provided on the surface of the vertical section facing away from the top plate

[0007] In some embodiments, at least one air guiding channel arranged vertically is provided in the vertical section, and the upper and lower ends of the air guiding channel are respectively communicated with the inner ring cavity and the corresponding ignition hole

[0008] In some embodiments, the outer end of the vertical section in the radial direction is flush with the lower edge of the surrounding plate; and / or a guiding surface is formed on the surface of the vertical section facing the top plate, and the lower edge of the guiding surface extends downward to the top of the top plate

[0009] In some embodiments, a liquid storage groove is recessed in the top of the top plate, or the top surface of the top plate is a flat surface.

[0010] In some embodiments, an inner ring retaining ring extending downward is fixedly provided at the peripheral edge of the lower end of the surrounding plate. A plurality of fixing posts arranged at circumferential intervals and extending outward are provided on the inner ring retaining ring, and / or a positioning portion extending outward is provided at a position on the outer side wall of the inner ring retaining ring corresponding to the ignition boss. A lower through hole is provided on the positioning portion.

[0011] In some embodiments, it further includes a brim. The brim is fixedly connected to the outer periphery of the lower end of the surrounding plate and is located below the ignition boss and the inner fire hole group.

[0012] In some embodiments, an outer inclined surface is formed on the top surface of the brim. The outer inclined surface is arranged to be inclined radially outward and downward from the surrounding plate to the brim.

[0013] In some embodiments, an upper through hole is provided at a position on the brim corresponding to the ignition boss. The upper through hole communicates with the lower through hole on the positioning portion.

[0014] According to a burner cap assembly provided above, it is realized by the following technical solutions:

[0015] A burner cap assembly, characterized by comprising: an inner burner cap as described above; and an outer burner cap provided at the bottom of the inner burner cap and having a central cavity with openings at both upper and lower ends and an outer ring cavity with a downward opening. An outer fire hole group communicating with the outer ring cavity is provided at the top of the outer burner cap, and the upper end of the central cavity communicates with the inner ring cavity.

[0016] In some embodiments, a drainage channel is recessed in the top of the outer burner cap. The drainage channel is used to receive the overflow liquid flowing down from the inner burner cap and is also used to drain the overflow liquid on the outer burner cap to the liquid storage tray.

[0017] In some embodiments, a plurality of water retaining ribs extending upward are provided on the top of the outer burner cap. The plurality of water retaining ribs are circumferentially spaced and arranged radially inside the outer fire hole group.

[0018] In some embodiments, the outer burner cap further has a secondary air channel with openings at both upper and lower ends. The secondary air channel is provided between the central cavity and the outer ring cavity. The orthographic projection of the inner burner cap covers the upper end outlet of the secondary air channel. A secondary air outlet is formed between the top of the outer burner cap and the bottom of the inner burner cap. The secondary air outlet communicates with the secondary air channel.

[0019] In some embodiments, it further includes a fire distributor, which is arranged at the bottom of the outer fire cap. The fire distributor is provided with an inner ring air passage and an outer ring air passage. The inner ring air passage is communicated with the lower end of the central cavity, and the outer ring air passage is communicated with the lower end of the outer ring cavity.

[0020] In some embodiments, the fire distributor is further provided with a middle ring air passage and / or an annular diversion part. The middle ring air passage is arranged between the inner ring air passage and the outer ring air passage and is communicated with the lower end of the secondary air passage of the outer fire cap. The annular diversion part is arranged at the periphery of the outer ring air passage and the outer fire cap and is used for diverting the overflow liquid flowing down from the outer fire cap to the liquid storage tray.

[0021] According to a burner provided above, it is realized through the following technical solutions:

[0022] A burner includes: a burner head provided with an upwardly open inner mixing chamber; and an inner fire cap as described above or a fire cap assembly as described in any one of the claims. The inner fire cap is arranged on the top of the burner head, and the inner ring cavity is communicated with the inner mixing chamber.

[0023] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0024] 1. For the inner fire cap of the present utility model, by designing the peripheral plate of the inner fire cap as a frustum of a cone shape and fixedly connecting the top plate to the upper end or top of the peripheral plate, and fixedly connecting the ignition boss to the outer side wall surface of the peripheral plate, compared with the existing inner fire cap, the height of the inner fire cap in the vertical direction is reduced, meeting the ultra-thin requirement, solving the problem that the existing inner fire cap protrudes too high from the glass panel and affecting the overall aesthetic effect of the kitchen, and at the same time being able to effectively protect the ignition needle;

[0025] 2. By arranging a brim at the periphery of the peripheral plate of the inner fire cap, the brim can divert the overflow liquid on the inner fire cap to the outer fire cap and then flow to the liquid storage tray through the outer fire cap, effectively preventing the overflow liquid from directly flowing downward into the burner interior, and solving the problem that the reserved secondary air passage between the outer ring fire cap and the inner ring fire cap of the existing burner affects the cleanliness of the burner interior. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural view of the inner fire cap in Embodiment 1 of the present utility model Figure 1 ;

[0027] Figure 2 is a schematic structural view of the inner fire cap in Embodiment 1 of the present utility model Figure 2 ;

[0028] Figure 3 is a cross-sectional view of the inner fire cap in Embodiment 1 of the present utility model;

[0029] Figure 4 It is a cross-sectional view of the inner fire cap in Embodiment 2 of the present utility model;

[0030] Figure 5 It is a bottom view of another inner fire cap in Embodiment 2 of the present utility model;

[0031] Figure 6 It is an exploded view of the fire cap assembly in Embodiment 3 of the present utility model;

[0032] Figure 7 It is a structural schematic diagram of the fire cap assembly in Embodiment 3 of the present utility model;

[0033] Figure 8 It is a cross-sectional view of the fire cap assembly in Embodiment 3 of the present utility model;

[0034] Figure 9 It is a structural schematic diagram of the outer fire cap in Embodiment 3 of the present utility model;

[0035] Figure 10 It is a bottom view of the outer fire cap in Embodiment 3 of the present utility model;

[0036] Figure 11 It is an exploded view of the fire cap assembly in Embodiment 4 of the present utility model;

[0037] Figure 12 It is a structural schematic diagram of the fire cap assembly in Embodiment 4 of the present utility model;

[0038] Figure 13 It is a cross-sectional view of the fire cap assembly in Embodiment 4 of the present utility model;

[0039] Figure 14 It is a structural schematic diagram of the flame divider in Embodiment 4 of the present utility model;

[0040] Figure 15 It is a bottom view of the flame divider in Embodiment 4 of the present utility model;

[0041] Figure 16 It is an exploded view of the burner in Embodiment 5 of the present utility model;

[0042] Figure 17 It is a structural schematic diagram of the burner in Embodiment 5 of the present utility model;

[0043] Figure 18 It is a cross-sectional view of the burner in Embodiment 5 of the present utility model;

[0044] Figure 19 It is a right view of the gas stove in Embodiment 5 of the present utility model;

[0045] Figure 20 It is a structural schematic diagram of the gas stove in Embodiment 5 of the present utility model;

[0046] Figure 21 It is a cross-sectional view of the burner in Embodiment 6 of the present utility model.

[0047] In the figure: 1 - inner fire cover, 10 - inner ring cavity, 11 - enclosing plate, 111 - inner ring fire holes, 112 - inner ring retaining ring, 113 - fixing column, 114 - positioning part, 12 - top plate, 121 - liquid holding groove, 13 - ignition boss, 131 - horizontal section, 132 - vertical section, 1321 - ignition hole, 1322 - air guiding channel, 1323 - guiding surface, 14 - brim, 141 - first through hole, 142 - outer inclined surface;

[0048] 2 - outer fire cover, 20 - secondary air outlet, 21 - central cavity, 22 - air cavity, 220 - second through hole, 221 - secondary air holes, 222 - annular diversion groove, 223 - water retaining rib, 224 - upper annular retaining ring, 23 - outer ring cavity, 231 - outer ring fire holes, 232 - strip-shaped diversion groove, 25 - first connecting part, 251 - first fixing hole, 26 - second connecting part, 261 - second fixing hole;

[0049] 3 - flame divider, 31 - inner ring air channel, 310 - inner ring groove, 311 - central through hole, 312 - inner ring diversion holes, 32 - middle ring air channel, 321 - middle ring groove, 322 - middle ring air holes, 323 - third through hole, 33 - outer ring air channel, 331 - outer ring groove, 332 - outer ring diversion holes, 333 - annular support platform, 334 - mounting column, 34 - annular diversion part, 351 - inner ring separating rib, 352 - outer ring separating rib;

[0050] 4 - burner head, 41 - burner head body, 411 - inner premixing chamber, 4111 - inner ring premixing head, 412 - air chamber, 4121 - secondary air inlet, 413 - outer premixing chamber, 4131 - outer ring premixing head, 42 - ejector assembly;

[0051] 5 - liquid holding tray; 6 - ignition assembly; 7 - housing assembly; 8 - pot support. Specific Embodiments

[0052] The following embodiments are used to illustrate the present utility model, but the present utility model is not limited by these embodiments. Modifying the specific embodiments of the present utility model or equivalently replacing some technical features without departing from the spirit of the present utility model's solution shall all be covered within the scope of the technical solution claimed by the present utility model.

[0053] Embodiment 1

[0054] Reference Figures 1 - 3, this embodiment provides an inner fire cap. The inner fire cap 1 is an integrally formed structure, and its diameter gradually decreases from bottom to top. The inner fire cap 1 includes a surrounding plate 11, a top plate 12, and an ignition boss 13. The surrounding plate 11 is in the shape of a frustum of a cone with a larger lower end and a smaller upper end. An inner fire hole group is provided on the surrounding plate 11, and the inner fire hole group is composed of a plurality of inner ring fire holes 111 arranged at intervals in the circumferential direction. The top plate 12 is fixedly connected to the upper end or the top of the surrounding plate 11 and the two are integrally formed. The top plate 12 and the surrounding plate 11 jointly enclose an inner ring cavity 10 opening downward, and the inner ring cavity 10 is communicated with the plurality of inner ring fire holes 111. The ignition boss 13 is fixedly connected to the outer wall surface of the surrounding plate 11 and the two are integrally formed. It includes a horizontal section 131 and a vertical section 132 fixedly connected to form a "7" shape. The horizontal section 131 is fixedly connected to the outer wall surface of the surrounding plate 11 through the vertical section 132. On the side of the vertical section 132 facing away from the top plate 12, a plurality of ignition holes 1321 are provided directly below the horizontal section 131 and communicated with the inner ring cavity 10.

[0055] It can be seen that by designing the surrounding plate 11 of the inner fire cap 1 as a frustum of a cone shape, and fixedly connecting the top plate 12 to the upper end or the top of the surrounding plate 11, and fixedly connecting the ignition boss 13 to the outer wall surface of the surrounding plate 11, compared with the existing inner fire cap, the height of the inner fire cap in the vertical direction is reduced, so that the distance H1 between the inner fire cap 1 and the top surface of the outer shell assembly 7 of the gas stove is less than 20 mm (see Figure 19 ), solving the problem that the existing inner fire cap protrudes too high from the glass panel and affects the overall aesthetic effect of the kitchen. In addition, the ignition needle of the burner can be effectively protected by the ignition boss 13, preventing the overflow liquid from flowing onto the head of the ignition needle and affecting the ignition effect (see Figure 17 or Figure 21 ).

[0056] Refer to Figure 3 , further, at least one air guiding channel 1322 arranged vertically is provided in the vertical section 132. The upper and lower ends of the air guiding channel 1322 are respectively communicated with the inner ring cavity 10 and the corresponding ignition holes 1321 to realize the upward transmission of the outer ring gas in the inner ring cavity 10 to the ignition holes. Refer to Figures 1 - 3 , specifically, the outer end of the vertical section 132 in the radial direction is flush with the lower edge of the surrounding plate 11 to achieve overall aesthetics; a guiding surface 1323 is formed on the side of the vertical section 132 facing the top plate 12. The guiding surface 1323 is an arc surface or an inclined surface. The lower edge of the guiding surface 1323 extends downward to the top of the top plate 12 to quickly guide the overflow liquid dripping onto the ignition boss 13 to the top plate 12 of the inner fire cap.

[0057] Refer to Figures 1 - 3, specifically, a plurality of inner ring fire holes 111 are evenly distributed in the area of the baffle 11 outside the ignition boss 13, which is beneficial to improving the unit gas outlet area and gas outlet uniformity. Since the baffle 11 is in the shape of a frustum with a larger lower end and a smaller upper end, different heights of inner ring fires can be formed, making the inner ring fire power distribution more uniform. A liquid receiving groove 121 with an upward opening is recessed at the top of the top plate 12, so that the inner fire cover 1 can receive the overflowing liquid, effectively preventing the overflowing liquid from flowing into the inner ring fire holes of the inner fire cover 1, and further avoiding the overflowing liquid from blocking the inner ring fire holes 111 and flowing into the burner interior, thus achieving the purpose of easy cleaning of the inner fire cover 1 and the burner. In other embodiments, the top surface of the top plate 12 can be designed as a flat surface. Of course, the top surface of the top plate 12 can also be designed as an inner inclined surface, and the inner inclined surface is arranged obliquely upward from the baffle 11 towards the central axis of the inner fire cover.

[0058] Furthermore, an inner ring retaining ring 112 extending downward is fixedly provided at the peripheral edge of the lower end of the baffle 11 to facilitate the sealing connection and cooperation between the inner fire cover 1 and the outer fire cover. A plurality of fixing posts 113 arranged at circumferential intervals and extending outward are provided on the inner ring retaining ring 112 to facilitate the stable, reliable and detachable connection and fixation of the inner fire cover 1 on the top of the outer fire cover. A positioning portion 114 extending outward is provided at the position corresponding to the ignition boss 13 on the outer side wall of the inner ring retaining ring 112. The positioning portion is used to strengthen the overall strength of the inner fire cover 1 and is also used to abut against the top of the outer fire cover. A lower through hole for the ignition assembly to pass through is provided on the positioning portion 114 to achieve the limit fixation of the ignition assembly through the inner fire cover 1.

[0059] Reference Figures 1 - 3 , furthermore, the inner fire cover 1 further includes a brim 14. The brim 14 is arranged outside the baffle 11 and integrally formed with the lower end of the baffle 11. The brim 14 is lower than the ignition hole assembly and the ignition boss 13. Specifically, the brim 14 is configured to drain the overflowing liquid dripping onto the inner fire cover to the outside of the inner fire cover 1, and is also used to block the upper end outlet of the secondary air passage on the outer fire cover to prevent the overflowing liquid from flowing downward into the burner interior through the upper end outlet of the secondary air passage, so that the inner fire cover 1 and the burner have better easy cleaning performance.

[0060] Specifically, the brim 14 is in a conical shape or in the shape of a frustum with a larger lower end and a smaller upper end, so that an outer inclined surface 142 is formed on the top surface of the brim 14. The outer inclined surface 142 is arranged obliquely downward from the baffle 11 towards the radial outside of the brim 14, so that the liquid dripping onto the brim 14 can automatically flow out of the inner fire cover downward along the outer inclined surface 14.

[0061] At the position of the brim 14 corresponding to the ignition boss 13, there is an upper through-hole for the ignition assembly to pass through. At the bottom of the brim 14 corresponding to the upper through-hole, a positioning portion 14 integrally formed with the brim 14 and the inner ring retaining ring 112 is formed. The lower through-hole on the positioning portion communicates with the upper through-hole to form a first through-hole 141, thus avoiding affecting the assembly of the ignition assembly due to the setting of the brim 14.

[0062] Embodiment 2

[0063] The difference between this embodiment and Embodiment 1 is that the inner fire cover 1 omits the positioning portion 14 (see Figure 4 ), so that the overall structure of the inner fire cover 1 is simpler. Of course, it can also be changed to omit the brim 14 of the inner fire cover 1 (see Figure 5 ), so that the diameter of the inner fire cover 1 is smaller, the structure is more compact, and the manufacturing cost is lower.

[0064] Embodiment 3

[0065] Referring to Figures 6 - 10 , this embodiment provides a fire cover assembly, which includes an outer fire cover 2 and an inner fire cover as described in Embodiment 1 or 2. The outer fire cover 2 is an integrally formed structure, and the outer fire cover 2 is disposed at the bottom of the inner fire cover 1 and the two are detachably connected as a whole for easy quick disassembly and assembly. Of course, the inner fire cover and the outer fire cover may not be connected as a whole. Since the inner fire cover and the outer fire cover adopt a stacked design, it is beneficial to reduce the height of the burner.

[0066] Specifically, the outer fire cover 2 has a central cavity 21 with openings at both the upper and lower ends and an outer ring cavity 23 with a downward opening. The central cavity 2 is used for the mixture of inner ring gas and air to pass through, and the outer ring cavity 23 is used for the mixture of outer ring gas and air to pass through. At the position of the top of the outer fire cover 2 corresponding to the outer ring cavity 23, there is an outer fire hole group communicating with the outer ring cavity 23. The outer fire hole group includes a plurality of outer ring fire holes 231 arranged at intervals. Since the outer ring fire holes are directly designed on the upper surface of the outer fire cover, it is also beneficial to reduce the height of the outer fire cover 2. When the inner fire cover 1 is covered on the top of the outer fire cover, the upper end of the central cavity 21 of the outer fire cover 2 communicates with the inner ring cavity 10 of the inner fire cover 1, so as to realize the upward transmission of the inner ring gas to the inner ring cavity of the inner fire cover 1 through the outer fire cover 2. In this way, while the outer fire cover meets the requirements of the outer ring fire, it has the function of inner ring gas transmission.

[0067] Referring to Figures 6 - 9, Further, a drainage channel (not shown in the figure) is recessed at the top of the outer burner cap 2. This drainage channel is used to receive the overflow liquid flowing down from the inner burner cap 1 and also to drain the overflow liquid on the outer burner cap 2 into the liquid receiving tray of the gas stove. In this way, the outer burner cap has the function of draining overflow liquid, and thus has good easy-to-clean performance. Specifically, a ring-shaped diversion groove 222 with an upward opening and located between the outer fire hole group and the central cavity 21 is recessed at the top of the outer burner cap 2. The ring-shaped diversion groove 222 is arranged opposite to the radial outer edge of the inner burner cap 1 and is used to receive the overflow liquid (i.e., the overflow) flowing down from the inner burner cap 1 to prevent this part of the overflow liquid from flowing into the outer ring fire holes 231.

[0068] More specifically, a plurality of strip-shaped diversion grooves 232 with upward openings are recessed on the radially outer side of the top of the outer burner cap 2. All the strip-shaped diversion grooves 232 are arranged at intervals in the circumferential direction. Each strip-shaped diversion groove 232 is arranged in the radial direction, and each strip-shaped diversion groove 232 is arranged to incline downward from the ring-shaped diversion groove 222 towards the radially outer side. The radially inner ends of all the strip-shaped diversion grooves 232 are respectively connected to the ring-shaped diversion groove 222 to form a drainage channel. In this way, the overflow liquid in the ring-shaped diversion groove 222 and on the outer burner cap can flow out of the outer burner cap along the strip-shaped diversion grooves 232.

[0069] In this embodiment, the number of the strip-shaped diversion grooves 232 is the same as the number of the legs of the pot support, and the strip-shaped diversion grooves 232 are arranged opposite to the legs of the pot support (see Figure 20 ). In this way, the strip-shaped diversion grooves 232 can receive the overflow liquid flowing down from the legs of the pot support and can also prevent the legs of the pot support from being burned by the flame, which is beneficial to reducing the temperature rise of the pot support and the panel of the gas stove. That is, an outer fire hole group is provided between adjacent strip-shaped diversion grooves 232, and the outer ring fire holes 231 are evenly distributed in the area between adjacent strip-shaped diversion grooves 232 on the top of the outer burner cap, so as to realize the zoning of the outer ring firepower while making the outer ring firepower distribution more uniform and the firepower range wider.

[0070] Refer to Figures 6 - 9 , Even further, a plurality of water retaining ribs 223 extending upward are provided on the top of the outer burner cap 2. The plurality of water retaining ribs 223 are circumferentially spaced and arranged on the radially inner side of the outer fire hole group and on the radially outer side of the ring-shaped diversion groove 222. Specifically, a water retaining rib 223 is provided between adjacent strip-shaped diversion grooves 232. The height of the water retaining rib 223 is 1.5 mm, 2 mm or 2.5 mm. The water retaining rib 223 forms the upper end of the outer groove wall of the ring-shaped diversion groove 222. Of course, the water retaining rib can also be arranged at intervals from the outer groove wall of the ring-shaped diversion groove 222. Thus, when the overflow liquid flows down from the inner burner cap 1 into the ring-shaped diversion groove 222 of the outer burner cap, due to the blocking effect of the water retaining rib 223, it will not flow into the outer ring fire holes.

[0071] Refer to Figures 6 - 10, Further, the outer burner cap 2 also has a secondary air passage (not shown in the figure), and the secondary air passage is arranged between the central cavity 21 and the outer ring cavity 23, so that the outer burner cap has the function of secondary air transmission. The orthographic projection of the inner burner cap 1 covers the upper end outlet of the secondary air passage, and a secondary air outlet 20 is formed between the top of the outer burner cap 2 and the bottom of the inner burner cap 1. The secondary air outlet 20 is communicated with the secondary air passage. In this way, on the one hand, the secondary air flows out from the gap after the superposition of the inner and outer burner caps, realizing the supplement of the secondary air required for the combustion of the inner and outer ring flames from the side of the burner cap assembly, making the combustion of the inner and outer ring flames more sufficient, effectively supporting the stable combustion of the large firepower of the ultra-thin burner, and solving the problem of insufficient firepower of the existing ultra-thin burner; on the other hand, the upper end outlet of the secondary air passage is hidden directly below the inner burner cap 1, so that the liquid overflowing from the pot cannot directly flow downward into the burner through the secondary air passage, but can only drip along the inner burner cap 1 to the top of the outer burner cap 2 and then flow out of the radial outside of the outer burner cap along the drainage channel of the outer burner cap 2, thus making the burner cap assembly and the inside of the burner easier to clean.

[0072] Specifically, the outer burner cap 2 is also provided with an air cavity 22 with a downward opening. The air cavity 22 is located between the central cavity and the outer ring cavity. At the inner and outer ends of the top of the outer burner cap 2 in the radial direction, an air hole group for the passage of secondary air is respectively provided. The air hole group is located between the annular diversion groove 222 and the central cavity and is composed of a plurality of secondary air holes 221 arranged at circumferential intervals. The air hole group is communicated with the air cavity 22 to form a secondary air passage, and the orthographic projection of the inner burner cap 1 covers the air hole group.

[0073] Embodiment 4

[0074] Reference Figures 11 - 15 , The difference between this embodiment and Embodiment 3 is that the burner cap assembly further includes a distributor 3. The distributor 3 is an integrally formed structure, which is arranged at the bottom of the outer burner cap 2 and is detachably connected to the outer burner cap 2 for easy quick disassembly and assembly. Of course, the distributor 3 and the outer burner cap 2 may not be integrally connected.

[0075] The distributor 3 has a receiving groove with an upward opening, and the lower end of the outer burner cap 2 is inserted into the receiving groove, so that the thickness of the burner cap assembly in the vertical direction is thinner. An inner ring air passage 31 and an outer ring air passage 33 arranged at intervals are provided in the receiving groove. The inner ring air passage 31 is communicated with the lower end of the central cavity 21 and is used for the passage of the mixture of the inner ring gas and air. The outer ring air passage 33 is communicated with the lower end of the outer ring cavity 23 and is used for the passage of the mixture of the outer ring gas and air.

[0076] Specifically, an inner ring groove 310 with an upward opening is provided at the central position of the fire divider. A central through hole 311 and a plurality of inner ring diversion holes 312 are formed in the groove bottom surface of the inner ring groove 310. The plurality of inner ring diversion holes 312 are circumferentially spaced around the central through hole. The central through hole 311 and the plurality of inner ring diversion holes 312 are respectively communicated with the inner ring groove 310 to form an inner ring air passage 31. In this way, the fire divider can evenly distribute the mixture of inner ring gas and air, enhance the premixing effect, and improve the combustion stability of the inner ring flame. In other embodiments, the central through hole 311 or the plurality of inner ring diversion holes 312 can be omitted.

[0077] The fire divider 3 is provided with an outer ring groove 331 with an upward opening and located outside the inner ring groove 310. A plurality of outer ring diversion holes 332 arranged at circumferential intervals are formed in the groove bottom of the outer ring groove 331. The plurality of outer ring diversion holes 332 are respectively communicated with the outer ring groove to form an outer ring air passage 33. In this way, the fire divider can evenly distribute the outer ring gas, which is beneficial to improving the combustion stability of the outer ring flame.

[0078] In this embodiment, the horizontal cross-sectional area of all the outer ring diversion holes 332 gradually increases in the clockwise or counterclockwise direction, that is, the area of the outer ring diversion hole 332 at the outlet of the ejector pipe of the burner head is the smallest, and then gradually increases along the clockwise or counterclockwise direction. In this way, it is convenient to control the area of the outer ring diversion hole to make the mixture of outer ring gas and air in the fire divider 3 uniform, ensure that the mixture of outer ring gas and air uniformly sprays upward from the outer ring fire holes, and keep the flame height consistent. In addition, all the outer ring diversion holes are vertically arranged, or all the outer ring diversion holes 332 are inclined in the clockwise or counterclockwise direction, and the inclination angle of the outer ring diversion holes 332 is 30 to 60 degrees. In this way, through the inclined outer ring diversion holes, the mixture of outer ring gas and air will spray upward from the fire divider 3 at a certain angle, forming a rotating air flow at a certain angle, which is beneficial to increasing the rotation of the air flow and further improving the premixing effect of the mixture.

[0079] Further, the fire divider 3 is also provided with a middle ring air passage 32 and / or an annular diversion part 34 for the passage of secondary air. The middle ring air passage 32 is arranged between the inner ring air passage 31 and the outer ring air passage 33. The middle ring air passage 32 is communicated with the lower end of the secondary air passage of the outer fire cover 2. A third through hole 323 for the ignition needle to pass through is arranged in the middle ring air passage. The annular diversion part 34 is arranged outside the outer ring air passage 33 and the outer fire cover 2, and is used to drain the overflow liquid flowing down from the outer fire cover 2 into the liquid receiving tray. In this embodiment, the annular diversion part 34 is in a conical shape or a frustum shape with a large lower end and a small upper end, and the annular diversion part 34 is lower than the radial outer side of the top of the outer fire cover 2.

[0080] Specifically, the burner has a middle ring groove 321 with an upward opening, and the middle ring groove 321 is located between the inner ring groove and the outer ring groove. A plurality of middle ring air holes 322 arranged at circumferential intervals are formed in the groove bottom surface of the middle ring groove 321. The plurality of middle ring air holes 322 are respectively communicated with the middle ring groove 321 to form a middle ring air passage 32, so that the burner 3 can evenly distribute the secondary air. A third through hole 323 is formed in the groove bottom surface of the middle ring groove 321, and the third through hole 323 is located between all the middle ring air holes 322 and the inner ring air passage 31.

[0081] Embodiment 5

[0082] Reference Figures 16 - 18 , this embodiment provides a burner, which includes a burner head 4 and a burner cap assembly as described in Embodiment 4. The burner head 4 includes a burner head body 41 and an ejector assembly 42. The ejector assembly 42 is detachably connected to the burner head body 41 to facilitate processing and manufacturing, improve production efficiency, and reduce manufacturing costs. Of course, it can also be integrally formed.

[0083] An internal mixing chamber 411 with an upward opening, an air chamber 412 with an upward opening, and an external mixing chamber 413 with an upward opening are provided on the burner head body 41 of the burner head 4. The air chamber 412 is arranged between the external mixing chamber 413 and the internal mixing chamber 411. A secondary air inlet 4121 is provided at the bottom of the cavity or the lower end of the outer cavity wall surface of the air chamber 412. The burner cap assembly is covered on the top of the burner head body of the burner head 4. The internal mixing chamber 411 is sequentially communicated with the inner ring cavity of the inner burner cap 1 through the inner ring air passage of the burner 3 and the central cavity of the outer burner cap 2. The secondary air inlet 4121 is sequentially communicated with the secondary air outlet 20 through the air chamber 412, the middle ring air passage of the burner 3, and the secondary air passage of the outer burner cap 2. The external mixing chamber 413 is communicated with the outer ring cavity of the outer burner cap 2 through the outer ring air passage of the burner 3. It can be seen that through the above burner cap assembly, the burner has good easy-to-clean performance and combustion stability performance.

[0084] Specifically, the secondary air inlet 4121 is provided at the lower end of the outer cavity wall surface of the air chamber 412, and the secondary air inlet 4121 faces the bottom of the external mixing chamber 413, so as to prevent the cleaning liquid from flowing into the housing assembly of the gas stove when the burner head 4 is cleaned. An inner ring premixing head 4111 and an outer ring premixing head 4131 extending downward are integrally formed at the bottom of the burner head body 41 of the burner head 4. The inner ejector tube in the ejector assembly 42 is communicated with the internal mixing chamber 411 through the inner ring premixing head, and the outer ejector tube in the ejector assembly 42 is communicated with the external mixing chamber 413 through the outer ring premixing head.

[0085] Reference Figures 19 - 20When the burner is installed in the mounting hole of the shell assembly 7 of the gas stove, the height of the burner slightly protrudes from the top of the shell assembly 7, that is, the distance H1 between the burner's fire cover assembly and the top of the shell assembly 7 is less than 20 mm, compared with the existing burner's fire cover to the glass panel of more than 40 mm, which effectively solves the problem that the existing burner protrudes too high from the glass panel and affects the overall aesthetic effect of the gas stove. In addition, when the pot bracket 8 is installed on the top of the shell assembly 8 and is sleeved outside the burner, the top of the pot bracket 8 is higher than the top of the burner, and the distance H2 between the top of the pot bracket and the top of the shell assembly is about 20 mm, compared with the existing pot bracket to the glass panel of more than 62 mm, which effectively solves the problem that the overall effect of the existing pot bracket is relatively abrupt after installation.

[0086] Example 6

[0087] refer to Figure 21 The difference between this embodiment and embodiment 5 is that the burner omits the fire distributor 3 in the fire cover assembly. When the fire cover assembly is covered on the top of the burner body of the burner 4, the inner air mixing chamber 411 is connected to the inner ring cavity of the inner fire cover 1 through the central cavity of the outer fire cover 2 in turn, the secondary air inlet 4121 is connected to the secondary air outlet 20 through the air chamber 412 and the secondary air channel of the outer fire cover 2 in turn, and the outer air mixing chamber 413 is directly connected to the outer ring cavity of the outer fire cover 2. As a result, the overall structure of the burner is simpler, the thickness is thinner or the height is lower, the manufacturing cost is lower, and the good easy-to-clean performance and combustion stability performance of the burner are not affected.

[0088] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. An inner fire cover, characterized in that: The inner fire cover comprises: The enclosing plate (11) is in the shape of a truncated cone with a larger lower end and a smaller upper end, and an inner fire hole group is provided on the enclosing plate (11); A top plate (12) is fixedly connected to the upper end or top of the enclosing plate (11), the top plate (12) and the enclosing plate (11) together enclose an inner annular cavity (10) opening downward, the inner annular cavity (10) being in communication with the inner fire hole group; and The ignition boss (13) comprises a transverse section (131) and a vertical section (132) which are fixedly connected to form a "7" shape, wherein the transverse section (131) is fixedly connected to the outer wall surface of the enclosure plate (11) via the vertical section (132), and a plurality of ignition holes (1321) which are connected to the inner ring cavity (10) are provided on a side of the vertical section (132) which faces away from the top plate (12).

2. An inner fire cover according to claim 1, characterized in that: At least one vertically arranged air bleed channel (1322) is provided in the vertical section (132), and the upper and lower ends of the air bleed channel (1322) are respectively connected to the inner annular cavity (10) and the corresponding ignition hole (1321).

3. An inner fire cover according to claim 1 or 2, characterized in that: The radial outer end of the vertical section (132) is flush with the lower edge of the enclosure plate (11); and / or a guide surface (1323) is formed on a side of the vertical section (132) facing the top plate (12), and the lower edge of the guide surface (1323) extends downward to the top of the top plate (12).

4. The inner fire cover according to claim 1, characterized in that: A liquid storage tank (121) is recessed on the top of the top plate (12), or the top surface of the top plate (12) is a plane.

5. The inner fire cover according to claim 1, characterized in that: An inner ring retaining ring (112) extending downward is fixedly provided at the circumferential edge of the lower end of the enclosure (11), a plurality of fixing columns (113) arranged circumferentially and extending outward are provided on the inner ring retaining ring (112), and / or a positioning portion (114) extending outward is provided at a position on the outer side wall of the inner ring retaining ring (112) corresponding to the ignition boss (13), and a lower through hole is provided on the positioning portion (114).

6. An inner fire cover according to claim 1, 4 or 5, characterized in that: It also includes a brim (14), which is fixedly connected to the outer periphery of the lower end of the enclosure (11) and is located below the ignition boss (13) and the inner fire hole group.

7. An inner fire cover according to claim 6, characterized in that: An outer inclined surface (142) is formed on the top surface of the brim (14), and the outer inclined surface (142) is arranged to be inclined downward from the enclosure plate (11) toward the radial outside of the brim (14).

8. The inner fire cover according to claim 6, characterized in that: An upper through hole is provided at a position of the hat brim (14) corresponding to the ignition boss (13), and the upper through hole is connected to the lower through hole on the positioning portion.

9. A fire cover assembly, characterized in that: include: An inner fire cover as described in any one of claims 1 to 8; as well as The outer fire cover (2) is arranged at the bottom of the inner fire cover, and comprises a central cavity (21) with upper and lower ends opened and an outer ring cavity (23) opened downwards, and an outer fire hole group connected to the outer ring cavity (23) is arranged on the top of the outer fire cover (2), and the upper end of the central cavity (21) is connected to the inner ring cavity (10).

10. A fire cover assembly according to claim 9, characterized in that: A drainage channel is recessed on the top of the outer fire cover (2), and the drainage channel is used to receive the overflow liquid flowing down from the inner fire cover, and is also used to drain the overflow liquid on the outer fire cover (2) into the liquid receiving tray.

11. A fire cover assembly according to claim 10, characterized in that: A plurality of water retaining ribs (223) extending upward are provided on the top of the outer fire cover (2), and the plurality of water retaining ribs (223) are arranged at circumferential intervals on the radial inner side of the outer fire hole group.

12. A fire cover assembly according to claim 9, characterized in that: The outer fire cover (2) also has a secondary air passage with openings at both ends, the secondary air passage is arranged between the central cavity (21) and the outer ring cavity (23), the orthographic projection of the inner fire cover covers the upper end outlet of the secondary air passage, and a secondary air outlet (20) is formed between the top of the outer fire cover (2) and the bottom of the inner fire cover, and the secondary air outlet (20) is connected to the secondary air passage.

13. A fire cover assembly according to any one of claims 9 to 12, characterized in that: It also includes a flame divider (3), which is arranged at the bottom of the outer fire cover (2), and the flame divider (3) is provided with an inner ring air duct (31) and an outer ring air duct (33), the inner ring air duct (31) is connected to the lower end of the central cavity (21), and the outer ring air duct (33) is connected to the lower end of the outer ring cavity (23).

14. A fire cover assembly according to claim 13, characterized in that: The ignition divider (3) is also provided with a middle ring air duct (32) and / or an annular guide portion (34); the middle ring air duct (32) is arranged between the inner ring air duct (31) and the outer ring air duct (33); the middle ring air duct (32) is connected to the lower end of the secondary air channel of the outer fire cover (2); the annular guide portion (34) is arranged on the periphery of the outer ring air duct (33) and the outer fire cover (2) and is used to guide the overflow liquid flowing down from the outer fire cover (2) to the liquid receiving tray.

15. A burner, characterized in that: include: A furnace head (4), wherein the furnace head (4) is provided with an inner gas mixing chamber (411) opening upward; An inner fire cover as described in any one of claims 1 to 8 or a fire cover assembly as described in any one of claims 9 to 14, wherein the inner fire cover is arranged on the top of the burner head (4), and the inner annular cavity (10) is connected to the inner mixing chamber (411).

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