Burner easy to clean and gas stove thereof

Abstract

The utility model discloses a burner easy to clean and a gas stove thereof, the burner is provided with an inner gas mixing chamber, an air chamber and an outer gas mixing chamber, and a secondary air inlet is arranged at the cavity bottom of the air chamber or the lower end of the outer cavity wall surface; the outer fire cover covers the top of the furnace head and is provided with a central cavity, a secondary air channel and an outer ring cavity, and the outer ring cavity is communicated with the outer gas mixing chamber; the inner fire cover covers the top of the outer fire cover, the orthographic projection of the inner fire cover covers the secondary air channel and an upper end outlet of the center cavity, the inner fire cover is provided with an inner ring cavity, the inner ring cavity is communicated with the inner gas mixing chamber through the center cavity, and a secondary air outlet is formed between the bottom of the inner fire cover and the top of the outer fire cover; and the secondary air outlet is communicated with the air chamber through a secondary air channel. According to the combustor, the problem that a secondary air channel is reserved between an outer ring fire cover and an inner ring fire cover of an existing combustor, so that the internal cleanness of the combustor is affected is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas stoves, in particular to an easily cleanable burner and a gas stove thereof. Background Art

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

[0003] The height of the fire cap 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 obtrusive, affecting the aesthetics of the gas stove and the style matching of the whole household appliances. 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 easily cleanable burner, which effectively solves the problem that the reserved secondary air channel between the outer fire cap and the inner fire cap of the existing burner affects the internal cleaning of the burner. The utility model also provides a gas stove.

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

[0006] An easily cleanable burner includes: a burner head, which is provided with an upwardly open inner mixing chamber, an upwardly open air chamber, and an upwardly open outer mixing chamber, and a secondary air inlet is provided at the bottom of the cavity or the lower end of the outer cavity wall of the air chamber; an outer fire cap, which is covered on the top of the burner head, and is provided with a central cavity with openings at both the upper and lower ends, a secondary air channel with openings at both the upper and lower ends, and an outer ring cavity with a downward opening. The secondary air channel is arranged between the outer ring cavity and the central cavity, and the outer ring cavity is communicated with the outer mixing chamber; and an inner fire cap, which is covered on the top of the outer fire cap, and its orthographic projection respectively covers the upper end outlets of the secondary air channel and the central cavity. The inner fire cap is provided with an inner ring cavity with a downward opening, and the inner ring cavity is communicated with the inner mixing chamber through the central cavity. A secondary air outlet is formed between the radially outer side of the bottom of the inner fire cap and the top of the outer fire cap, and the secondary air outlet is communicated with the air chamber through the secondary air channel.

[0007] In some embodiments, the secondary air inlet is arranged at the lower end of the outer cavity wall of the air chamber, and the secondary air inlet is lower than the bottom of the outer mixing chamber.

[0008] In some embodiments, the outer burner cap is further provided with an air chamber opening downward. At the radially inner and outer ends of the top of the outer burner cap, an air hole group and an outer flame hole group are respectively provided. The air hole group is communicated with the air chamber to form a secondary air passage, and the outer flame hole group is communicated with the outer ring chamber; the orthographic projection of the inner burner cap covers the air hole group.

[0009] In some embodiments, an annular diversion groove opening upward is recessed in the top of the outer burner cap. The annular diversion groove is arranged outside the secondary air passage and directly below the outer peripheral edge of the inner burner cap.

[0010] In some embodiments, a plurality of strip-shaped diversion grooves opening upward and arranged at intervals in the circumferential direction are further recessed in the radially outer end of the top of the outer burner cap. The strip-shaped diversion grooves are arranged in the radial direction, and their radially inner ends are communicated with the annular diversion groove. An outer flame hole group is provided between adjacent strip-shaped diversion grooves.

[0011] In some embodiments, a plurality of water-blocking ribs extending upward are integrally formed on the top of the outer burner cap. The plurality of water-blocking ribs are circumferentially arranged at intervals outside the annular diversion groove. The water-blocking ribs are in clearance fit with the outer groove wall of the annular diversion groove, or the water-blocking ribs form the upper end of the outer groove wall of the annular diversion groove.

[0012] In some embodiments, the diameters of both the inner burner cap and the outer burner cap gradually decrease from bottom to top. A liquid receiving groove opening upward is recessed at the center position of the top of the inner burner cap.

[0013] In some embodiments, a burner divider is further included. The burner divider is arranged between the outer burner cap and the burner head. The burner divider is provided with an inner ring air passage, a middle ring air passage, and an outer ring air passage. The inner mixing chamber is communicated with the lower end of the central chamber through the inner ring air passage. The air chamber is connected with the lower end of the air chamber through the middle ring air passage. The outer mixing chamber is connected with the lower end of the outer ring chamber through the outer ring air passage.

[0014] In some embodiments, the burner divider is provided with a receiving groove opening upward and adapted to receive the outer burner cap. An inner ring air passage, a middle ring air passage, and an outer ring air passage are formed in the receiving groove and arranged at intervals in the radial direction. The lower end of the outer burner cap is inserted into the receiving groove and is detachably connected to the burner divider.

[0015] In some embodiments, the burner divider is further provided with an annular diversion part. The annular diversion part is arranged outside the outer ring air passage and the outer burner cap and is used for diverting the overflow liquid flowing down from the outer burner cap to the liquid receiving tray.

[0016] In some embodiments, it further includes an ignition assembly. An ignition boss with a plurality of ignition holes and a first through hole located below the ignition boss are provided on the inner fire cover. A second through hole communicating with the secondary air passage is provided at a position corresponding to the first through hole on the top of the outer fire cover. The ignition assembly is disposed directly below the ignition boss, and its lower end sequentially passes through the first through hole and the second through hole vertically and is connected to the burner head.

[0017] A gas stove provided as above is achieved through the following technical solutions:

[0018] A gas stove includes: a housing assembly, with an installation hole opened at the top of the housing assembly; and an easily cleanable burner as described above, the burner is disposed at the installation hole, and the distance between the highest point of the inner fire cover and the top of the housing assembly is less than 20 mm.

[0019] In some embodiments, it further includes a pot support, which is disposed on the top of the housing assembly and around the upper end of the burner. The pot support is higher than the inner fire cover, and its height is about 20 mm.

[0020] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0021] 1. For the burner of the present utility model, by disposing the outer fire cover on the top of the burner head and covering the inner fire cover on the top of the outer fire cover, the orthographic projection of the inner fire cover respectively covers the central cavity of the outer fire cover and the upper end outlet of the secondary air passage. The inner ring cavity on the inner fire cover is connected to the inner air chamber of the burner head through the central cavity on the outer fire cover. A secondary air outlet is formed between the radially outer side of the bottom of the inner fire cover and the top of the outer fire cover. The secondary air outlet is connected to the air chamber of the burner head through the secondary air passage. On the one hand, it enables the secondary air to only flow out from the gap after the superposition of the inner fire cover and the outer fire cover, realizing the supplement of the secondary air required for the combustion of the inner and outer ring fires from the side, making the combustion of the inner and outer ring fires more sufficient, effectively supporting the stable combustion of the large firepower of the ultra-thin burner, and solving the problem that the firepower of the existing ultra-thin burner is not large enough. On the other hand, it realizes hiding the upper end outlet of the secondary air passage on the outer fire cover directly below the inner fire cover, so that the overflowing liquid cannot directly flow downward into the burner interior through the secondary air passage, effectively solving the problem that the reserved secondary air passage between the outer ring fire cover and the inner ring fire cover of the existing burner affects the cleaning of the burner interior;

[0022] 2. By concavely providing an upwardly opening annular drainage groove on the top of the outer fire cover and located around the secondary air passage, and the annular diversion groove is disposed opposite to the radially outer end of the inner fire cover, in this way, the outer fire cover can catch the overflowing liquid flowing down from the inner fire cover, preventing this part of the overflowing liquid from flowing into the burner interior through the secondary air passage or the outer hole group, thereby making the interior of the burner easier to clean;

[0023] 3. By providing a plurality of strip-shaped diversion grooves with upward openings on the radially outer side of the top of the outer burner cap, it is convenient to drain the overflow liquid on the outer burner cap into the liquid receiving tray located outside the outer burner cap. At the same time, it can prevent the feet of the pot support directly above the strip-shaped diversion grooves 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. Description of the Drawings

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

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

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

[0027] Figure 4 is a schematic structural view of the inner burner cap in Embodiment 1 of the present utility model Figure 1 ;

[0028] Figure 5 is a schematic structural view of the inner burner cap in Embodiment 1 of the present utility model Figure 2 ;

[0029] Figure 6 is a cross-sectional view of the inner burner cap in Embodiment 1 of the present utility model;

[0030] Figure 7 is a schematic structural view of the outer burner cap in Embodiment 1 of the present utility model;

[0031] Figure 8 is a bottom view of the outer burner cap in Embodiment 1 of the present utility model;

[0032] Figure 9 is a schematic structural view of the sub-burner in Embodiment 1 of the present utility model;

[0033] Figure 10 is a bottom view of the sub-burner in Embodiment 1 of the present utility model;

[0034] Figure 11 is an exploded view of the burner in Embodiment 1 of the present utility model;

[0035] Figure 12 is a schematic structural view of the burner in Embodiment 1 of the present utility model;

[0036] Figure 13 is a cross-sectional view of the burner in Embodiment 1 of the present utility model;

[0037] Figure 14 is a right view of the gas stove in Embodiment 1 of the present utility model;

[0038] Figure 15 is a schematic structural diagram of the gas stove in Embodiment 1 of the present utility model;

[0039] Figure 16 is an exploded view of the burner head assembly in Embodiment 2 of the present utility model;

[0040] Figure 17 is a schematic structural diagram of the burner head assembly in Embodiment 2 of the present utility model;

[0041] Figure 18 is a cross-sectional view of the burner head assembly in Embodiment 2 of the present utility model;

[0042] Figure 19 is a cross-sectional view of the burner in Embodiment 2 of the present utility model.

[0043] In the figure: 1 - inner burner head, 10 - inner ring cavity, 11 - enclosing plate, 111 - inner ring flame holes, 112 - inner ring retaining ring, 113 - fixing post, 114 - positioning part, 12 - top plate, 121 - liquid storage tank, 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;

[0044] 2 - outer burner head, 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 flame holes, 232 - strip-shaped diversion groove, 25 - first connecting part, 251 - first fixing hole, 26 - second connecting part, 261 - second fixing hole;

[0045] 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 post, 34 - annular diversion part, 351 - inner ring separating rib, 352 - outer ring separating rib;

[0046] 4 - burner base, 41 - burner base 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;

[0047] 5 - liquid storage tray; 6 - ignition assembly; 7 - housing assembly; 8 - pot support. Detailed implementation manners

[0048] The following embodiments illustrate the present utility model, but the present utility model is not limited by these embodiments. Modifying the specific implementation manner of the present utility model or making equivalent replacements for some technical features without departing from the spirit of the present utility model scheme shall be covered within the scope of the technical solution claimed by the present utility model.

[0049] Embodiment 1

[0050] Reference Figures 1 - 15 , this embodiment provides an easily cleanable burner, including a burner cap assembly and a burner head 4. The burner cap assembly includes an inner burner cap 1 and an outer burner cap 2, and both the inner burner cap 1 and the outer burner cap 2 are integrally formed structures. The burner head 4 is provided with an upwardly open inner mixing chamber 411, an upwardly open air chamber 412, and an upwardly open outer mixing chamber 413. The air chamber 412 is arranged between the outer mixing chamber 413 and the inner mixing chamber 411, and a secondary air inlet 4121 is provided at the bottom of the cavity or the lower end of the outer cavity wall of the air chamber 412. In this embodiment, a liquid receiving tray 5 detachably connected to the burner head 4 is sleeved on the upper end of the burner head body 41 of the burner head 4.

[0051] The outer burner cap 2 covers the top of the burner head 4, and is provided with a central cavity 21 with openings at both upper and lower ends, a secondary air passage (not shown in the figure) with openings at both upper and lower ends, and an outer ring cavity 23 with a downward opening. The secondary air passage is arranged between the outer ring cavity 23 and the central cavity 21, and the outer ring cavity 23 is communicated with the outer mixing chamber 413. Among them, the central cavity 21 is used for the mixture of inner ring gas and air to pass through, the secondary air passage is used for secondary air to pass through, and the outer ring cavity is used for the mixture of outer ring gas and air to pass through. Thus, compared with the existing outer burner cap, the outer burner cap 2 can not only meet the requirements of the outer ring fire, but also has the function of transmitting the inner ring gas and secondary air.

[0052] The inner fire cover 1 is disposed on the top of the outer fire cover 2 so that the inner fire cover is superimposed on the top of the outer fire cover. In this embodiment, the inner fire cover 1 and the outer fire cover 2 are detachably connected as a whole. In other embodiments, the inner fire cover 1 and the outer fire cover 2 may not be connected as a whole. The orthographic projection of the inner fire cover 1 respectively covers the upper end outlet of the secondary air passage and the upper end outlet of the central cavity 21. In this way, the upper end outlet of the secondary air passage on the outer fire cover 2 is hidden directly below the inner fire cover 1, so that the overflowing liquid cannot directly flow downward into the burner interior through the upper end outlet of the secondary air passage, effectively solving the problem that the reserved secondary air passage between the outer ring fire cover and the inner ring fire cover of the existing burner affects the cleanliness of the burner interior. The inner fire cover 1 is provided with an inner ring cavity 10 with a downward opening, and the inner ring cavity 10 is communicated with the inner mixing chamber 411 through the central cavity 21. A secondary air outlet 20 is formed between the radially outer side of the bottom of the inner fire cover 1 and the top of the outer fire cover 2. The secondary air outlet 20 is communicated with the air chamber 412 through the secondary air passage. In this way, the secondary air can only flow out from the gap after the inner fire cover 1 and the outer fire cover 2 are superimposed, realizing the supply of secondary air required for the combustion of the inner and outer ring fires from the side, making the combustion of the inner and outer ring fires more sufficient, effectively supporting the stable combustion of the large firepower of the ultra-thin burner, and solving the problem that the firepower of the existing ultra-thin burner is not large enough.

[0053] Reference Figures 10 - 15 , specifically, 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. An upwardly opening inner mixing chamber 411, an upwardly opening air chamber 412, and an upwardly opening outer mixing chamber 413 are provided on the burner head body 41 of the burner head 4. The inner mixing chamber 411 is disposed between the outer mixing chamber 413 and the air chamber 412. A secondary air inlet 4121 is provided at the bottom of the cavity or the lower end of the outer cavity wall of the air chamber 412.

[0054] In this embodiment, the secondary air inlet 4121 is provided at the lower end of the outer cavity wall of the air chamber 412, and the secondary air inlet 4121 is lower than the bottom of the outer mixing chamber 413. In this way, the cleaning liquid during the cleaning of the burner head 4 can be prevented from flowing into the housing assembly of the gas stove through the secondary air inlet. In addition, 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 41. The inner ejector tube in the ejector assembly 42 is communicated with the inner mixing chamber 411 through the inner ring premixing head, and the outer ejector tube in the ejector assembly 42 is communicated with the outer mixing chamber 413 through the outer ring premixing head.

[0055] Reference Figures 1 - 6, in this embodiment, the diameter of the inner fire cap 1 gradually decreases from bottom to top, so that the inner fire cap is conical or frustum-shaped. The inner fire cap 1 includes a peripheral plate 11, a top plate 12, an ignition boss 13, and a brim 14. The peripheral plate 11 is frustum-shaped with a larger lower end and a smaller upper end and forms the side wall of the inner fire cap. An inner fire hole group is provided on the peripheral plate 11, and the inner fire hole group is composed of a plurality of inner ring fire holes 111 arranged at circumferential intervals. The top plate 12 forms the top of the inner fire cap 1, and the top plate 12 is fixedly connected to the upper end or top of the peripheral plate 11 and the two are integrally formed. The top plate 12 and the peripheral plate 11 jointly enclose an inner ring cavity 10 opening downward, and the inner ring cavity 10 communicates with a plurality of inner ring fire holes 111. The ignition boss 13 is fixedly connected to the outer wall surface of the peripheral plate 11 and the two are integrally formed. It includes a horizontal section 131 and a vertical section 132 fixedly connected into a "7" shape. The horizontal section 131 is fixedly connected to the outer wall surface of the peripheral 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 located directly below the horizontal section 131 and communicating with the inner ring cavity 10 are provided.

[0056] It can be seen that by designing the peripheral plate 11 of the inner fire cap 1 to be frustum-shaped, fixedly connecting the top plate 12 to the upper end or top of the peripheral plate 11, and fixedly connecting the ignition boss 13 to the outer wall surface of the peripheral 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 14 ), 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 13 ).

[0057] Reference Figure 6 , 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 connected to 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. Reference Figures 4 - 6 , in this embodiment, the outer end of the vertical section 132 is flush with the lower edge of the peripheral 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, and the lower edge of the guiding surface 1323 extends downward to the top of the top plate 12 of the inner fire cap 1 to quickly guide the overflow liquid dripping onto the ignition boss 13 to the top plate 12 of the inner fire cap 1.

[0058] Reference Figures 4 - 6, specifically, a plurality of inner ring flame holes 111 are evenly distributed in the area of the baffle 11 outside the ignition boss 13, which is beneficial to improving the unit air outlet area and air outlet uniformity. Since the baffle 11 is in the shape of a frustum of a cone with a larger lower end and a smaller upper end, different heights of inner ring flames can be formed, making the inner ring firepower 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 flame holes of the inner fire cover 1, and further avoiding the overflowing liquid from blocking the inner ring flame 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, which is arranged obliquely upward from the baffle 11 towards the central axis of the inner fire cover.

[0059] Furthermore, an inner ring retaining ring 112 extending downward is fixedly provided at the peripheral edge of the lower end of the baffle 11, so as to facilitate the sealing connection and cooperation between the inner fire cover 1 and the upper annular retaining ring 224 on the outer fire cover 2. A plurality of fixing posts 113 arranged at circumferential intervals and extending outward are provided on the inner ring retaining ring 112, and the plurality of fixing posts 113 are arranged in one-to-one correspondence with the first connection parts on the outer fire cover, so as to stably and reliably detachably connect and fix the inner fire cover 1 to the top of the outer fire cover 2. A positioning part 114 extending outward is provided on the outer side wall of the inner ring retaining ring 112 at a position corresponding to the ignition boss 13. The positioning part is used to strengthen the overall strength of the inner fire cover 1 and also used to abut against the top of the outer fire cover 2.

[0060] Reference Figures 4 - 6 , a brim 14 extending outward is integrally formed at the peripheral edge of the lower end of the baffle 11 of the inner fire cover 1, and the orthographic projection of the brim 14 covers the upper end outlet of the secondary air passage of the outer fire cover 2, and a secondary air outlet 20 is formed between the brim 14 and the top of the outer fire cover 2. In this embodiment, the brim 14 is in a conical shape or in the shape of a frustum of a cone 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, and 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 1 downward along the outer inclined surface 14.

[0061] When the inner fire cover 1 is stacked on the top of the outer fire cover 2, the radially outer end of the brim 14 is arranged opposite to the annular diversion groove 222 of the outer fire cover 2, so that the annular diversion groove 222 can receive the overflowing liquid flowing from the brim 14. A first through hole 141 for the ignition needle to pass through is provided at a position of the brim 14 corresponding to the ignition boss 13. The first through hole 141 is directly below the transverse section of the ignition boss 13, and the first through hole 141 penetrates downward through the positioning part 114 of the inner fire cover 1 and communicates with the second through hole on the outer fire cover 2, so as to avoid affecting the assembly of the ignition component due to the setting of the brim.

[0062] Reference Figures 1 - 8, specifically, the outer fire cover 2 is further provided with an air cavity 22 with a downward opening. At the radially inner and outer ends of the top of the outer fire cover 2, an air hole group and an outer fire hole group for the passage of secondary air are respectively provided. The air hole group includes 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. The orthographic projection of the inner fire cover 1 covers the air hole group, that is, the air hole group is covered by the orthographic projection of the brim of the inner fire cover 1. The outer fire hole group includes a plurality of outer ring fire holes 231 arranged at intervals. The outer fire hole group is communicated with the outer ring cavity 23. Since both the outer ring fire holes 231 and the secondary air holes 221 are directly designed on the upper surface of the outer fire cover 2, it is beneficial to reduce the height of the outer fire cover 2 and meet the ultra-thin requirement.

[0063] Reference Figures 7 - 8 , further, a ring-shaped diversion groove 222 with an upward opening and located between the inner air hole group and the outer fire hole group is recessed on the top of the outer fire cover 2. The ring-shaped diversion groove 222 is arranged opposite to the radially outer edge of the inner fire cover 1, that is, the ring-shaped diversion groove 222 is located directly below the free end of the brim 14 of the inner fire cover 1 (see Figure 3 ), and is used to catch the overflow liquid (i.e., the overflow) flowing down from the inner fire cover 1 to prevent this part of the overflow liquid from flowing into the outer ring fire holes 231 or the secondary air holes, so as to solve the problem that the reserved secondary air passage between the outer ring fire cover and the inner ring fire cover of the existing burner affects the internal cleanliness of the burner.

[0064] Furthermore, a plurality of strip-shaped diversion grooves 232 with upward openings are recessed on the radially outer side of the top of the outer fire cover 2. All the strip-shaped diversion grooves 232 are arranged at circumferential intervals. The strip-shaped diversion grooves 232 are arranged in the radial direction, and the radially inner ends of the strip-shaped diversion grooves 232 are respectively communicated with the ring-shaped diversion groove 222 to form a drainage channel, so that the overflow liquid in the ring-shaped diversion groove can flow out of the outer fire cover 2 along the strip-shaped diversion grooves 232. In this way, the outer fire cover 2 has an overflow liquid drainage function and thus has good easy-to-clean performance.

[0065] In this embodiment, the strip-shaped diversion grooves 232 are arranged to incline downward from the ring-shaped diversion groove 222 to the radially outer side, so as to quickly drain the overflow liquid out of the outer fire cover 2. In addition, the number of the strip-shaped diversion grooves 232 is the same as the number of the feet of the pot support 8, and the strip-shaped diversion grooves 232 are arranged opposite to the feet of the pot support 8 (see Figure 15 ). In this way, the strip-shaped diversion grooves 232 can catch the overflow liquid flowing down from the feet of the pot support and can also prevent the feet of the pot support 8 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. An outer fire hole group is provided between adjacent strip-shaped diversion grooves 232, that is, the area between adjacent strip-shaped diversion grooves 232 on the top of the outer fire cover 2 is evenly filled with outer ring fire holes 231, so as to realize the zoning of the outer ring fire power while making the outer ring fire power distribution more uniform and the fire power range wider.

[0066] ReferenceFigures 7 - 8 Furthermore, on the top of the outer burner cap 2, a water retaining rib 223 extending upward and located between adjacent strip-shaped diversion grooves 232 is integrally formed. The water retaining rib 223 is arranged on the radial outer side of the annular diversion groove 222, and the height of the water retaining rib 223 is any one of 1.5 mm, 2 mm, or 2.5 mm. In this embodiment, the water retaining rib 223 forms the upper end of the outer groove wall of the annular diversion groove 222. In other embodiments, the water retaining rib can be arranged at intervals from the outer groove wall of the annular diversion groove 222. Thus, when the overflow liquid from the inner burner cap 1 flows downward into the annular diversion groove 222 of the outer burner cap 2, due to the blocking effect of the water retaining rib 223, it will not flow into the outer ring fire holes.

[0067] In this embodiment, the radial outer side of the top of the outer burner cap 2 is an outer guiding surface, and the radial inner side of the top of the outer burner cap 2 is an inner guiding surface or an inner flat surface. Both the inner guiding surface and the outer guiding surface are arranged to be inclined or curved from the inside to the radial outside and downward, so that the outer burner cap 2 is in a conical shape or a frustum shape with a larger lower end and a smaller upper end. At this time, the diameter of the outer burner cap 2 gradually decreases from bottom to top, which is beneficial to reducing the thickness of the outer burner cap. The outer fire hole group and the strip-shaped drainage grooves are both arranged on the outer guiding surface, so that the outer fire hole group and the strip-shaped drainage grooves are both arranged to be inclined in the radial direction, which is convenient for draining the overflow liquid and gas, and at the same time, can form outer ring fires at different heights, making the distribution of the outer ring firepower more uniform; the air hole group and the second through holes 220 are both arranged on the inner guiding surface or the inner flat surface; the annular diversion groove can be arranged at the radial outer end of the inner guiding surface or the inner flat surface, or at the radial inner end of the outer guiding surface.

[0068] Reference Figure 8 Furthermore, in the air cavity 22, a plurality of first connecting parts 25 arranged at circumferential intervals and close to the central cavity 21 are provided. The first connecting parts 25 are integrally formed with the cavity top surface and the cavity inner side wall surface of the air cavity 22 respectively, and first fixing holes 25 are formed on the first connecting parts 25 and penetrate through them and the top of the outer burner cap 2 respectively. On the inner ring retaining ring 112, a plurality of fixing posts 113 arranged at circumferential intervals and extending outward are provided. The plurality of fixing posts 113 are arranged in one-to-one correspondence with the plurality of first connecting parts 25, and the fixing posts 113 are firmly connected with the corresponding first connecting part through fasteners (such as screws), so that the outer burner cap 2 and the inner burner cap are detachably connected as a whole.

[0069] In addition, in the outer ring cavity 23, a plurality of second connecting parts 26 arranged at circumferential intervals and far from the air cavity 22 are provided. The second connecting parts 26 are integrally formed with the cavity top surface and the cavity outer side wall surface of the outer ring cavity 23 respectively, and the second connecting parts 26 are provided with second fixing holes 261 opening downward, so that it is convenient for the outer burner cap 2 to be detachably connected with the burner head through the second connecting parts 26 as a whole.

[0070] Reference Figures 1 - 15, Further, the burner further includes a gas distributor 3, which is arranged between the outer burner cap 2 and the burner head 4. In this embodiment, the gas distributor 3 is an integrally formed structure and is detachably connected to the outer burner cap 2 as a whole. In other embodiments, the gas distributor and the outer burner cap may not be connected as a whole. The gas distributor 3 is provided with an inner ring air passage 31, a middle ring air passage 32, and an outer ring air passage 33. The middle ring air passage 32 is located between the outer ring air passage 33 and the inner ring air passage 31. The inner mixing chamber 411 is connected to the lower end of the central cavity 21 through the inner ring air passage 31 and is used for allowing the mixture of inner ring gas and air to pass through. The air chamber 412 is connected to the lower end of the air cavity 22 through the middle ring air passage 32 and is used for allowing secondary air to pass through. The outer mixing chamber 413 is connected to the lower end of the outer ring cavity 23 through the outer ring air passage 33 and is used for allowing the mixture of outer ring gas and air to pass through. In this way, the gas distributor 3 has the three major functions of transmitting inner ring gas, secondary air, and outer ring gas.

[0071] Reference Figures 9 - 10 , The gas distributor 3 has a receiving groove (not shown in the figure) with an upward opening. The lower end of the outer burner cap 2 is inserted into the receiving groove and is detachably connected to the gas distributor, so that the thickness of the burner cap assembly in the vertical direction is thinner. The inner ring air passage 31, the middle ring air passage 32, and the outer ring air passage 33 are arranged at intervals in the radial direction in the receiving groove. In this embodiment, an inner ring separating rib 351 and an outer ring separating rib 352 located outside the inner ring separating rib are provided in the receiving groove to divide the receiving groove into an inner ring groove 310, a middle ring groove, and an outer ring groove arranged at intervals in the radial direction.

[0072] Reference Figures 9 - 10 , Specifically, an inner ring groove 310 with an upward opening is provided at the central position of the gas distributor 3. A central through hole 311 and a plurality of inner ring shunt holes 312 are formed on the bottom surface of the inner ring groove 310. The plurality of inner ring shunt holes 312 are circumferentially arranged at intervals around the central through hole. The central through hole 311 and the plurality of inner ring shunt holes 312 are respectively connected to the inner ring groove 310 to form the inner ring air passage 31. In this way, the gas distributor 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 shunt holes 312 can be omitted.

[0073] The gas distributor 3 is provided with a middle ring groove 321 that opens upward and is located outside the inner ring groove 310. 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 gas distributor 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. The third through hole 323 is located between all the middle ring air holes 322 and the inner ring air passage 31, and is arranged corresponding to the second through hole 220 on the outer fire cap 2.

[0074] The gas distributor 3 is provided with an outer ring groove 331 that opens upward and is located outside the middle ring groove 321. 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, so that the gas distributor can evenly distribute the outer ring gas, which is beneficial to improving the combustion stability of the outer ring flame.

[0075] 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 outer ring injection 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 the outer ring gas and air in the gas distributor 3 uniform, ensuring that the mixture of the outer ring gas and air evenly sprays upward from the outer ring fire holes and the flame height remains consistent. Further, all the outer ring diversion holes 332 are arranged obliquely 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 obliquely arranged outer ring diversion holes, the mixture of the outer ring gas and air will spray upward from the gas distributor 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. In other embodiments, all the outer ring diversion holes can be arranged vertically.

[0076] Reference Figures 1 - 3 and Figures 9 - 10 Further, the gas distributor 3 is further provided with an annular diversion part 34. The annular diversion part 34 is in a conical shape or a frustum shape with a large lower end and a small upper end. It is arranged outside the outer ring air passage 33 and the outer fire cap 2 and is lower than the top of the lower edge of the outer fire cap 2, and is used for diverting the overflow liquid flowing down from the outer fire cap 2 to the liquid receiving tray, so that the gas distributor has an overflow liquid diversion function.

[0077] Reference Figures 11 - 15, the burner further includes an ignition assembly 6. An ignition boss 13 with a plurality of ignition holes 1321 is provided on the inner fire cap 1, and a first through hole 141 is located below the ignition boss 13. A second through hole 220 communicating with the secondary air passage is provided at the position corresponding to the first through hole 141 on the top of the outer fire cap 2. The ignition assembly 6 is disposed directly below the ignition boss 13, and its lower end sequentially passes through the first through hole 141 and the second through hole 220 vertically and is connected to the burner head 4.

[0078] Reference Figures 14 - 15 , this embodiment also provides a gas stove, which includes a housing assembly 7 and an easily cleanable burner as described above. An installation hole (not shown in the figure) is provided at the top of the housing assembly 7. The burner is disposed at the installation hole. The distance between the highest point of the inner fire cap 1 and the top of the housing assembly 7 is less than 20 mm, so as to ensure that the height of the burner slightly protrudes from the top of the housing assembly 7. Compared with the height of the fire cap of the existing burner to the glass panel being more than 40 mm, it 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.

[0079] Furthermore, the gas stove further includes a pot support 8. When the pot support 8 is installed on the top of the outer shell assembly 8 and sleeved outside the burner, the top of the pot support 8 is higher than the top of the burner, and the distance H2 between the top of the pot support and the top of the outer shell assembly is about 20 mm. Compared with the height of the existing pot support to the glass panel being more than 62 mm, it effectively solves the problem that the overall effect is rather abrupt after the installation of the existing pot support.

[0080] Embodiment 2

[0081] Reference Figures 16 - 19 , the difference between this embodiment and Embodiment 1 is that the burner omits the distributor 3. After the fire cap assembly is covered on the top of the burner head body 41 of the burner head 4, the inner mixing chamber 411 is sequentially communicated with the inner ring chamber of the inner fire cap 1 through the central cavity of the outer fire cap 2, and the secondary air inlet 4121 is sequentially communicated with the secondary air outlet 20 through the air chamber 412 and the secondary air passage of the outer fire cap 2. The outer mixing chamber 413 is directly communicated with the outer ring chamber of the outer fire cap 2. Thus, the overall structure of the burner is simpler, the thickness is thinner or the height is lower, the manufacturing cost is lower, and it does not affect the good easy-cleaning performance and combustion stability performance of the burner.

[0082] 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. An easy-to-clean burner, characterized in that: include: The furnace head (4) is provided with an inner air mixing chamber (411) opening upward, an air chamber (412) opening upward, and an outer air mixing chamber (413) opening upward, and a secondary air inlet (4121) is provided at the bottom of the air chamber (412) or at the lower end of the outer chamber wall; an outer fire cover (2) which is arranged on the top of the burner head (4) and is provided with a central cavity (21) with upper and lower ends being open, a secondary air passage with upper and lower ends being open, and an outer ring cavity (23) which is open downwards, wherein the secondary air passage is arranged between the outer ring cavity (23) and the central cavity (21), and the outer ring cavity (23) is in communication with the outer air mixing chamber (413); and An inner fire cover (1) is arranged on the top of the outer fire cover (2), and its orthographic projection covers the secondary air passage and the upper end outlet of the central cavity (21) respectively. The inner fire cover (1) is provided with an inner annular cavity (10) opening downward, and the inner annular cavity (10) is connected to the inner mixing chamber (411) through the central cavity (21). A secondary air outlet (20) is formed between the radial outer side of the bottom of the inner fire cover (1) and the top of the outer fire cover (2), and the secondary air outlet (20) is connected to the air chamber (412) through the secondary air passage.

2. An easy-to-clean burner according to claim 1, characterized in that: The secondary air inlet (4121) is arranged at the lower end of the outer cavity wall of the air chamber (412), and the secondary air inlet (4121) is lower than the bottom of the outer mixing chamber (413).

3. The easy-to-clean burner according to claim 1, characterized in that: The outer fire cover (2) is also provided with an air cavity (22) opening downwards, and an air hole group and an outer fire hole group are respectively provided at the radial inner and outer ends of the top of the outer fire cover (2), the air hole group is connected with the air cavity (22) to form a secondary air passage, and the outer fire hole group is connected with the outer ring cavity (23); the orthographic projection of the inner fire cover (1) covers the air hole group.

4. The easy-to-clean burner according to claim 1, characterized in that: An upwardly opening annular guide groove (222) is recessed on the top of the outer fire cover (2); the annular guide groove (222) is arranged at the periphery of the secondary air passage and is located directly below the outer periphery of the inner fire cover (1).

5. The easy-to-clean burner according to claim 4, characterized in that: A plurality of strip guide grooves (232) opening upward and arranged at intervals in the circumferential direction are also recessed at the radial outer end of the top of the outer fire cover (2); the strip guide grooves (232) are arranged in the radial direction, and their radial inner ends are connected to the annular guide groove (222); and an outer fire hole group is provided between adjacent strip guide grooves (232).

6. The easy-to-clean burner according to claim 4, characterized in that: A plurality of water retaining ribs (223) extending upward are integrally formed on the top of the outer fire cover (2); the plurality of water retaining ribs (223) are circumferentially spaced and arranged at the periphery of the annular guide groove (222); the water retaining ribs (223) are clearance-matched with the outer groove wall of the annular guide groove (222), or the water retaining ribs (223) constitute the upper end of the outer groove wall of the annular guide groove (222).

7. The easy-to-clean burner according to claim 1, characterized in that: The diameter of the inner fire cover (1) and the diameter of the outer fire cover both gradually decrease from bottom to top, and a liquid storage tank (121) opening upward is recessed at the center of the top of the inner fire cover (1).

8. The easy-to-clean burner according to claim 3, characterized in that: The invention also includes a flame divider (3), which is arranged between the outer fire cover (2) and the burner head (4), and is provided with an inner ring air duct (31), a middle ring air duct (32) and an outer ring air duct (33). The inner mixing air chamber (411) is connected to the lower end of the central cavity (21) through the inner ring air duct (31), the air chamber (412) is connected to the lower end of the air cavity (22) through the middle ring air duct (32), and the outer mixing air chamber (413) is connected to the lower end of the outer ring cavity (23) through the outer ring air duct (33).

9. The easy-to-clean burner according to claim 8, characterized in that: The ignition divider (3) is provided with a receiving groove which opens upward and is adapted to receive the outer fire cover (2), and an inner ring air duct (31), a middle ring air duct (32) and an outer ring air duct (33) which are arranged at intervals in a radial direction are formed in the receiving groove, and the lower end of the outer fire cover (2) is inserted into the receiving groove and is detachably connected to the ignition divider (3).

10. The easy-to-clean burner according to claim 8, characterized in that: The fire distributor (3) is also provided with an annular guide portion (34), which is arranged on the periphery of the outer ring air passage (33) and the outer fire cover (2) and is used to guide the overflow liquid flowing down from the outer fire cover (2) into the liquid receiving tray (5).

11. The easy-to-clean burner according to claim 1, characterized in that: It also includes an ignition assembly (6), wherein an ignition boss (13) having a plurality of ignition holes (1321) and a first through hole (141) located below the ignition boss (13) are provided on the inner fire cover (1), and a second through hole (220) connected to the secondary air channel is provided at a position corresponding to the first through hole (141) on the top of the outer fire cover (2), the ignition assembly (6) is arranged directly below the ignition boss (13), and its lower end is vertically penetrated in turn through the first through hole (141) and the second through hole (220) and is connected to the burner head (4).

12. A gas stove, characterized in that: include: A housing component (7), wherein a mounting hole is provided on the top of the housing component (7); as well as An easy-to-clean burner as described in any one of claims 1 to 11, wherein the burner is arranged at the mounting hole, and the distance between the highest point of the inner fire cover (1) and the top of the shell assembly is less than 20 mm.

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