阅读说明：本技术 一种燃气燃烧器及应用有该燃烧器的燃气灶 (Gas burner and gas stove with same ) 是由 王帅东 于 2018-07-28 设计创作，主要内容包括：本发明涉及一种燃气燃烧器,包括内环火盖、外环火盖、内环引射管、外环引射管以及基座,上述外环火盖呈环形并围设在上述内环火盖的外周,所述基座包括开口朝上的外环环道,上述外环火盖盖设在上述外环环道上而形成外环混气腔,所述外环引射管横贯在基座的底部,并且,其出气端口开口于上述外环环道并与外环环道的内侧面相对；还涉及一种燃气灶。本发明中燃烧器的结构紧凑,体积较小,而且能有效延伸外环引射管的引射长度,从而保证其较好的引射性能,并且能使气体分子之间充分碰撞,燃气与空气充分混合,进而提高燃烧效率。本发明中的燃气灶中,燃烧器可整体地从承液盘上移除,此时承液盘上仅留有点火针和热电偶,方便清洁。(The invention relates to a gas burner, comprising an inner ring fire cover, an outer ring fire cover, an inner ring ejection pipe, an outer ring ejection pipe and a base, wherein the outer ring fire cover is annular and surrounds the periphery of the inner ring fire cover; still relate to a gas-cooker. The burner has a compact structure and a small volume, and can effectively extend the injection length of the outer ring injection pipe, thereby ensuring better injection performance, fully colliding gas molecules and fully mixing gas and air, and further improving the combustion efficiency. In the gas stove, the burner can be integrally removed from the liquid bearing disc, and only the ignition needle and the thermocouple are left on the liquid bearing disc, so that the gas stove is convenient to clean.)

1. The utility model provides a gas burner, includes that inner ring fire lid (24), outer ring fire lid (23), inner ring draw and penetrate pipe (9), outer ring draw and penetrate pipe (8) and base (21), above-mentioned outer ring fire lid (23) are the annular and enclose and establish in the periphery of above-mentioned inner ring fire lid (24), characterized in that, base (21) include outer ring circuit (211) that the opening is up, above-mentioned outer ring fire lid (23) lid is established on this outer ring circuit (211) and is formed outer ring and mix the gas chamber (211a), outer ring draws and penetrates pipe (8) and traverse in the bottom of base (21), and, its gas outlet port (82a) opening is in above-mentioned outer ring circuit (211) and relative with the medial surface of outer ring circuit (211).

2. The gas burner as claimed in claim 1, wherein said outer annular ejector tube (8) traverses the bottom of said outer annular ring (211) in the direction of the diameter of the circle on which said outer annular ring (211) is located.

3. The gas burner according to claim 1, wherein the outlet port (82a) of the outer ring ejector tube (8) is opposed to the inner side surface of the outer side wall of the outer ring annular passage (211).

4. The gas burner of claim 1, wherein the base (21) further comprises an inner annular groove (212) having an upward opening, the outer annular ring (211) is provided around the outer periphery of the inner annular groove (212), a secondary air port (212a) is provided at the bottom of the inner annular groove (212), and the secondary air port (212a) is exposed when the inner annular cap (24) is placed on the inner annular groove (212) to form an inner annular air mixing chamber (212c) as viewed from above toward the inner annular cap (24).

5. The gas burner of claim 4, wherein said inner burner cap (24) comprises an annular inner burner cap body having a central bore (241) with a first end (241a) opposite said secondary air port (212a), a second end (241b) provided with an air guide ramp (242), said air guide ramp (242) being integral with said inner burner cap body and recessed downwardly relative to a top edge of said central bore (241), and said air guide ramp (242) being inclined downwardly from said second end (241b) of said central bore (241) towards said first end (241a) of said central bore (241) and extending in the direction of said secondary air port (212 a).

6. Gas burner according to claim 5, characterized in that said central hole (241) has an elliptical shape.

7. The gas burner of claim 5, wherein said inner ring injector tube (9) is disposed at the bottom of said base (21) and has an inlet end (91) fixed to the bottom of said outer ring (211) and an outlet end (92) extending into said inner ring mixing ring cavity (212c) and opposite to said air guide ramp (242).

8. The gas burner according to claim 7, characterized in that said inner annular ejector tube (9) is inclined upwards with respect to the horizontal plane from its inlet end (91) to its outlet end (92).

9. The gas burner of any one of claims 1 to 8, wherein the outer annular flame cover (23) comprises an outer annular flame cover body, the outer annular flame cover body comprises a first annular top surface (231) and a first inner annular wall (232) and a first outer annular wall (233) which are respectively formed by inclining or vertically extending downward from the inner edge and the outer edge of the first annular top surface (231), the first annular top surface (231) comprises a first flame outlet ring surface (231a) inclining from outside to inside along the circumferential direction, the first flame outlet ring surface (231a) is provided with outer annular flame holes (230) at intervals along the circumferential direction, and each outer annular flame hole (230) inclines in the same direction along the circumferential direction from bottom to top relative to the first flame outlet ring surface (231 a).

10. The gas burner of any one of claims 5 to 8, wherein the inner ring fire cover body comprises a second annular top surface (243), and a second inner ring wall (245) and a second outer ring wall (244) which are respectively formed by inclining or vertically extending downward from the inner edge and the outer edge of the second annular top surface (243), the second annular top surface (243) comprises a second fire ring surface (243a) inclining from outside to inside along the circumferential direction, inner ring fire holes (240) are circumferentially arranged on the second fire ring surface (243a) at intervals, and each inner ring fire hole (240) inclines in the same direction along the circumferential direction from bottom to top relative to the second fire ring surface (243 a).

11. A gas stove using the gas burner according to any one of claims 1 to 10, comprising a panel (1), an ignition needle (4), a thermocouple (5) and a liquid bearing disc (3), wherein the panel (1) is provided with a mounting hole (10) for mounting the gas burner (2), the gas stove is characterized in that the liquid bearing disc (3) is arranged on the panel (1) and covers the mounting hole (10), the liquid bearing disc (3) is provided with two positioning holes (311) at the part of the liquid bearing disc (3) covering the mounting hole (10), the ignition needle (4) and the thermocouple (5) are respectively inserted into the mounting hole (10), and the ignition needle (4) and the thermocouple (5) vertically penetrate through the liquid bearing disc (3),

the bottom of the base (21) is provided with a substrate (22), the substrate (22) is respectively provided with an inner ring nozzle (7) and an outer ring nozzle (6) which respectively correspond to the inner ring injection pipe (9) and the outer ring injection pipe (8), the bottom of the substrate (22) which respectively corresponds to the inner ring nozzle (7) and the outer ring nozzle (6) is respectively and fixedly provided with a first limiting column (221) and a second limiting column (222), the first limiting column (221) and the second limiting column (222) can be respectively embedded into the corresponding positioning holes (311), and the first limiting column (221) and the second limiting column (222) are respectively provided with gas pipe channels (221a, 222a) which are used for the corresponding gas pipes to pass through and are communicated with the corresponding nozzles,

a first through hole (223) and a second through hole (224) for the ignition needle (4) and the thermocouple (5) to penetrate are respectively formed at the corresponding positions of the substrate (22).

Technical Field

The invention relates to the field of gas cookers, in particular to a gas burner and a gas cooker with the same.

Background

The existing gas burner is generally provided with an inner ring fire cover and an outer ring fire cover, and correspondingly, an inner ring injection pipe and an outer ring injection pipe which respectively correspond to the inner ring fire cover and the outer ring fire cover are arranged on the gas stove. The existing upper air inlet gas burner has the problem of insufficient injection force due to the limitation of the structure of the burner. The invention discloses an overhead burner, which comprises a fire cover, a middle disc and a base from top to bottom, wherein the middle disc and the base are installed and matched to form a small-fire injection pipe and a main-fire injection pipe, the middle disc is also internally provided with a small fire outlet pipe and a main fire outlet pipe, the air outlet end of the small-fire injection pipe is connected with the small fire outlet pipe, the air outlet end of the main-fire injection pipe is connected with the main fire outlet pipe, the other ends, namely the air inlet ends, of the small-fire injection pipe and the main-fire injection pipe are respectively connected with a gas interface, the middle disc and the fire cover are installed and matched to form a combustion chamber, and the top surface of the fire cover is provided with a plurality of uniformly distributed strip-shaped fire outlet holes. Because the structural limitation of combustion chamber makes main fire draw and penetrates a tub length shorter in this patent to draw the penetrating power to cause the influence.

The Chinese invention patent with the patent number ZL201010270662 (with the publication number CN101936548B) discloses an upper air inlet gas stove, wherein a burner base is provided with a central ejector pipe, the upper surface of the burner base is provided with an annular groove, the side surface of the burner base is provided with an air supplementing hole, the bottom surface of the burner base is provided with support legs and is connected with two side ejector pipes, the lower end surface of an outer ring fire cover is provided with a circular annular channel, the outer circumference of the outer ring fire cover is provided with a fire hole, the central fire cover is erected in the center of the outer ring fire cover, the bottom of the gas ejector base is provided with a central gas nozzle and a central gas interface, and the upper surface of the gas. Though can follow the reinforcing through setting up two sides and draw penetrating power in this patent, set up two and draw and penetrate the structure that the pipe not only made the combustor complicated, cause the restriction to overall arrangement, the setting of combustor structure moreover, be unfavorable for the further improvement of combustor structure.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a gas burner with simple structure, high combustion efficiency and strong injection force aiming at the prior art.

The second technical problem to be solved by the invention is to provide a gas stove with simple structure, easy cleaning and high combustion efficiency aiming at the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a gas burner comprises an inner ring fire cover, an outer ring fire cover, an inner ring injection pipe, an outer ring injection pipe and a base, wherein the outer ring fire cover is annular and surrounds the periphery of the inner ring fire cover.

In order to prolong the injection length of the outer ring injection pipe to the maximum extent and further improve the injection performance of the outer ring injection pipe, the outer ring injection pipe traverses the bottom of the outer ring loop along the diameter direction of the circle where the outer ring loop is located.

Preferably, the base further includes an inner annular groove with an upward opening, the outer annular ring is disposed around the outer circumference of the inner annular groove, a secondary air port is disposed at the bottom of the inner annular groove, and when the inner annular fire cover is disposed on the inner annular groove to form an inner annular air mixing chamber, the secondary air port is exposed when viewed from the upward direction of the inner annular fire cover. Thereby supplementing secondary air to the inner ring fire through the secondary air port and promoting the combustion of the inner ring fire.

Preferably, the inner ring fire cover comprises an annular inner ring fire cover body, a first end of a central hole of the inner ring fire cover body is opposite to the secondary air port, a second end of the central hole of the inner ring fire cover body is provided with an air guide inclined plane, the air guide inclined plane and the fire cover body are integrated and are downwards sunken relative to the top edge of the central hole, and the air guide inclined plane inclines downwards from the second end of the central hole to the first end of the central hole and extends towards the secondary air port. Therefore, air supplemented by the secondary air port can flow to the inner ring fire cover along the air guide inclined plane, so that secondary air can be better supplemented for combustion of the inner ring fire.

Preferably, the central hole has an elliptical shape. Therefore, the area of the secondary air port can be increased, the volume of the inner cavity surrounded by the central hole is increased, and the supply of secondary air to the inner ring fire is increased.

Preferably, the inner ring injection pipe is arranged at the bottom of the base, the air inlet end of the inner ring injection pipe is fixed with the bottom of the outer ring loop, and the air outlet end of the inner ring injection pipe extends into the inner ring air mixing ring cavity and is opposite to the air guide inclined plane. Therefore, gas sprayed by the inner ring injection pipe can collide with the gas guide inclined plane, and fuel gas and air are fully mixed, so that the combustion efficiency of the inner ring is improved.

Preferably, the inner ring ejector pipe is inclined upwards relative to the horizontal plane from the gas inlet end to the gas outlet end. Thereby make the mixing gas can draw the ring chamber of mixed gas of entering inner ring more high-efficiently to because the inner ring draws the slope setting of penetrating the pipe, can accelerate the velocity of motion of air molecule and gas molecule respectively, and then enable further intensive mixing of gas and air.

Preferably, the outer ring fire cover comprises an outer ring fire cover body, the outer ring fire cover body comprises a first ring-shaped top surface, a first inner ring wall and a first outer ring wall, the first inner ring wall and the first outer ring wall are formed by respectively inclining or vertically and downwardly extending the inner edge and the outer edge of the first ring-shaped top surface, the first ring-shaped top surface comprises a first fire outlet ring surface inclining from outside to inside along the circumferential direction, outer ring fire holes are circumferentially arranged on the first fire outlet ring surface at intervals, and each outer ring fire hole inclines along the circumferential direction from bottom to top relative to the first fire outlet ring surface. Therefore, the inner rotary fire can be formed on the first fire outlet ring surface of the outer ring fire cover, the contact area of the combustion flame and the pot bottom is increased, and the combustion efficiency is improved.

Preferably, the inner ring fire cover body comprises a second annular top surface, and a second inner ring wall and a second outer ring wall which are formed by respectively inclining or vertically and downwardly extending the inner and outer side edges of the second annular top surface, the second annular top surface comprises a second fire outlet ring surface inclining from outside to inside along the circumferential direction, inner ring fire holes are circumferentially arranged on the second fire outlet ring surface at intervals, and each inner ring fire hole inclines in the same direction along the circumferential direction from bottom to top relative to the second fire outlet ring surface. Therefore, the inner rotary fire can be formed on the second fire outlet ring surface of the inner ring fire cover, the contact area of the combustion flame and the pot bottom is increased, and the combustion efficiency is improved.

The technical scheme adopted by the invention for solving the second technical problem is as follows: a gas stove with the gas burner comprises a panel, an ignition needle, a thermocouple and a liquid bearing disc, wherein the panel is provided with a mounting hole for mounting the gas burner, and the gas stove is characterized in that the liquid bearing disc is arranged on the panel and covers the mounting hole, the liquid bearing disc is respectively provided with two positioning holes at the part of the liquid bearing disc covering the mounting hole, the ignition needle and the thermocouple are respectively inserted into the corresponding mounting holes, the ignition needle and the thermocouple are vertically penetrated on the liquid bearing disc, the bottom of a base is provided with a base plate, the base plate is respectively provided with an inner ring nozzle and an outer ring nozzle which respectively correspond to the inner ring injection pipe and the outer ring injection pipe, the bottom of the base plate respectively corresponding to the inner ring nozzle and the outer ring injection pipe is respectively and fixedly provided with a first limiting column and a second limiting column, and the first limiting column and the second limiting column can be respectively embedded into the corresponding positioning holes, and the first limit column and the second limit column are respectively provided with a gas pipe channel for the corresponding gas pipe to pass through and opposite to the corresponding nozzle, and the corresponding position of the substrate is also respectively provided with a first penetrating hole and a second penetrating hole for the ignition needle and the thermocouple to penetrate through.

Compared with the prior art, the invention has the advantages that: the outer ring injection pipe penetrates through the bottom of the base, so that the structure of the combustor is compact, the size of the combustor is small, and the injection length of the outer ring injection pipe can be effectively extended, so that the good injection performance of the combustor is guaranteed. In addition, the outer loop draws the outlet port opening of penetrating the pipe in above-mentioned outer loop ring way and relative with the medial surface of outer loop ring way to enable abundant collision between the gas molecule, gas and air intensive mixing, and then improve combustion efficiency. In the gas stove, the burner is positioned on the liquid bearing disc through the first limiting column and the second limiting column, and meanwhile, the ignition needle and the thermocouple are arranged on the burner in a penetrating mode through the first penetrating hole and the second penetrating hole respectively, so that the burner can be integrally removed from the liquid bearing disc, and only the ignition needle and the thermocouple are left on the liquid bearing disc at the moment, and the gas stove is convenient to clean.

Drawings

FIG. 1 is a schematic structural view of a gas range according to an embodiment of the present invention;

fig. 2 is a partial structure exploded view of a gas range according to an embodiment of the present invention;

FIG. 3 is a partial exploded view of section I of FIG. 2;

FIG. 4 is a schematic view of a burner according to an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 4 in another direction;

FIG. 6 is a schematic view of the structure of FIG. 4 in still another direction;

FIG. 7 is a partial structural view of a burner according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view taken along A-A of FIG. 6;

FIG. 9 is a cross-sectional view taken along line B-B of FIG. 6;

FIG. 10 is a schematic structural diagram of an outer ring fire cover in an embodiment of the present invention;

FIG. 11 is a schematic view of the structure of FIG. 10 in another direction;

FIG. 12 is a schematic structural view of an inner ring fire cover in an embodiment of the present invention;

FIG. 13 is a schematic view of the structure of FIG. 12 in another direction;

FIG. 14 is a cross-sectional view of an inner ring fire cover in an embodiment of the invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 14, a gas stove includes a panel 1, a gas burner 2, an ignition needle 4, a thermocouple 5 and a liquid bearing disc 3. The panel 1 is provided with a mounting hole 10 for mounting the gas burner 2, the liquid receiving tray 3 is arranged on the panel 1 and covers the mounting hole 10, two positioning holes 311 are respectively formed in the part of the liquid receiving tray 3 covering the mounting hole 10, the ignition needle 4 and the thermocouple 5 are respectively inserted into the mounting hole 10, and the ignition needle 4 and the thermocouple 5 are respectively vertically arranged on the liquid receiving tray 3 in a penetrating manner.

The gas burner 2 comprises a base 21, and an inner ring fire cover 24, an outer ring fire cover 23, an inner ring injection pipe 9 and an outer ring injection pipe 8 which are respectively arranged on the base 21. Further, a base plate 22 is disposed at the bottom of the base 21, an inner ring nozzle 7 and an outer ring nozzle 6 corresponding to the inner ring injection pipe 9 and the outer ring injection pipe 8 are respectively mounted on the base plate 22, a first limiting column 221 and a second limiting column 222 are respectively fixedly disposed at the bottom of the base plate 22 corresponding to the inner ring nozzle 7 and the outer ring nozzle 6, the first limiting column 221 and the second limiting column 222 can be respectively embedded into the corresponding positioning holes 311, gas pipe passages 221a and 222a through which the corresponding gas pipes pass and which are opposite to the corresponding nozzles are respectively disposed on the first limiting column 221 and the second limiting column 222, and a first through hole 223 and a second through hole 224 through which the ignition needle 4 and the thermocouple 5 pass are further disposed at the corresponding positions of the base plate 22. During the equipment insert first through-hole 223 and second through-hole 224 respectively with ignition needle 4 and thermocouple 5, insert corresponding locating hole 311 respectively with first spacing post 221 and the spacing post 222 of second simultaneously, can realize the location installation of gas burner 2 on panel 1, the location is accurate, equipment convenient and fast, only need during the cleanness take off gas burner 2 expose the corresponding department of holding liquid dish 3 can, convenient and clean. In order to further facilitate the cleaning of the gas stove, in this embodiment, the liquid-receiving plate 3 is a flat plate as a whole, and further, a mounting boss 31 matching with the base 21 is protruded at the center thereof, the upper ignition needle 4 and the thermocouple 5 are respectively inserted into the mounting boss 31, the positioning holes 311 are respectively opened on the mounting boss 31, and the gas burner 2 is installed in alignment with the mounting boss 31 when being installed. The liquid receiving plate 3 has a liquid blocking flange 32 formed by projecting upward from the peripheral edge thereof, and the liquid receiving ring groove 33 is defined by the liquid blocking flange 32 and the mounting boss 31.

The base 21 includes an outer ring 211 with an upward opening and an inner ring cavity 212, the outer ring 211 is circular, the inner ring cavity 212 is circular, the outer ring 211 surrounds the inner ring cavity 212, the outer ring fire cover 23 covers the outer ring 211 to form an outer ring air mixing cavity 211a, and the inner ring fire cover 24 covers the inner ring cavity 212 to form an inner ring air mixing cavity 212 c.

In this embodiment, the outer fire cover 23 includes an outer fire cover body, the outer fire cover body includes a first annular top surface 231, and a first inner annular wall 232 and a first outer annular wall 233 formed by respectively inclining or vertically extending from the inner edge and the outer edge of the first annular top surface 231, the first annular top surface 231 includes a first fire outlet ring surface 231a inclining from outside to inside along the circumferential direction, outer fire holes 230 are circumferentially spaced on the first fire outlet ring surface 231a, and each outer fire hole 230 inclines from bottom to top along the circumferential direction with respect to the first fire outlet ring surface 231. Therefore, the inner rotary fire can be formed on the first fire outlet ring surface 231 of the outer ring fire cover 23, the contact area of the combustion flame and the bottom of the pan is increased, and the combustion efficiency is improved.

The bottom of the inner ring empty groove 212 is provided with a secondary air port 212a communicated with the outside, the shape of the secondary air port 212a is approximately semicircular, and when the inner ring fire cover 24 is covered on the inner ring empty groove 212 to form the inner ring air mixing chamber 212c, the secondary air port 212a is exposed to the outside when viewed from the direction from the upper part to the inner ring fire cover 24, so that secondary air is supplemented to the inner ring fire through the secondary air port 212a, and the combustion of the inner ring fire is promoted. Specifically, the inner ring fire lid 24 includes an annular inner ring fire lid body, a first end 241a of a center hole 241 of the inner ring fire lid body is opposite to the secondary air port 212a, a second end 241b is provided with an air guide slope 242, the air guide slope 242 is integrated with the fire lid body and is recessed downward with respect to a top edge of the center hole 241, and the air guide slope 242 is inclined from the second end 241b of the center hole 241 toward the first end 241a of the center hole 241 from above to below and extends toward the secondary air port 212 a. Thus, the air supplemented by the secondary air port 212a flows along the air guide slope 242 to the inner ring fire cover 24, so that the secondary air can be supplemented to the combustion of the inner ring fire. In order to better form the inner ring air mixing chamber 212c by the inner ring fire cover 24 and the inner ring hollow groove 212 and to better supplement the air to the inner ring fire cover 24 through the secondary air ports 212a, the first end 241a of the central hole 241 and the side edge of the hole surrounded by the air guide inclined surface 242 extend vertically and downwardly along the circumferential direction to form an upper rim 241c, and the ports of the secondary air ports 212a extend vertically and upwardly to form a lower rim 212b, and the upper rim 241c and the lower rim 212b are identical in shape and can be split up and down, so that the inner ring fire cover 24 and the inner ring hollow groove 212 better surround the inner ring air mixing chamber 212c and the secondary air ports 212a can be better exposed in the inner ring fire cover 24. Preferably, in this embodiment, the central hole 241 is formed in an elliptical shape, so that the area of the secondary air port 212a can be increased, and the volume of the inner cavity surrounded by the central hole 241 can be increased, thereby increasing the supply of the secondary air to the inner ring fire.

Further, the inner ring fire lid body includes a second annular top surface 243, and a second inner ring wall 245 and a second outer ring wall 244 formed by respectively inclining or vertically extending downward the inner and outer edges of the second annular top surface 243, the second annular top surface 243 includes a second fire outlet ring surface 243a inclining from outside to inside along the circumferential direction, inner ring fire holes 240 are circumferentially arranged on the second fire outlet ring surface 243a at intervals, and each inner ring fire hole 240 inclines in the same direction along the circumferential direction from bottom to top relative to the second fire outlet ring surface 243 a. Therefore, the inner rotary fire can be formed on the second fire outlet ring surface 243a of the inner ring fire cover 24, the contact area of the combustion flame and the pan bottom is increased, and the combustion efficiency is improved.

The outer ring injection pipe 8 is arranged at the bottom of the base 21, specifically, the outer ring injection pipe 8 traverses the bottom of the base 21 along the diameter direction of the outer ring loop 211, the top of the gas inlet end 82 of the outer ring injection pipe is fixed with the bottom of one side of the outer ring loop 211, the top of the gas outlet end 81 is fixed with the bottom of the opposite side, and the top of the middle end is fixed with the bottom of the inner ring empty groove 212. Therefore, the structure of the combustor 2 is compact, the size is small, the injection length of the outer ring injection pipe 8 can be effectively extended, and the good injection performance of the combustor is guaranteed. In addition, the outlet port 82a of the outer ring ejector pipe 8 opens in the outer ring loop 211 and is opposite to the inner side surface of the outer ring loop 211, so that gas molecules can be fully collided, gas and air can be fully mixed, and the combustion efficiency can be improved. In addition, because the outer ring ejector pipe 8 traverses the bottom of the base 21 along the diameter direction of the outer ring loop 211, the airflow ejected from the outer ring ejector pipe 8 can be divided into two airflows in the outer ring air mixing cavity 211a, and the two airflows respectively spread along the two side cavity spaces of the outer ring air mixing cavity 211a, so that the uniformity of the airflow in the outer ring fire outlet 230 is ensured, and the stable combustion of the outer ring flame is further ensured.

The inner ring injection pipe 9 is arranged at the bottom of the base 21, the air inlet end 91 of the inner ring injection pipe is fixed with the bottom of the outer ring loop 211, and the air outlet end 92 of the inner ring injection pipe extends into the inner ring air mixing ring cavity 212c and is opposite to the air guide inclined plane 242, so that air sprayed by the inner ring injection pipe 9 can collide with the air guide inclined plane 242, and fuel gas and air are fully mixed, thereby improving the combustion efficiency of the inner ring. The inner ring injection pipe 9 is inclined upward with respect to the horizontal plane from the gas inlet end 91 to the gas outlet end 92 thereof. Thereby enable the gas mixture can draw more high-efficiently and penetrate the interior ring and mix in the gaseous ring chamber 212c to because the slope setting of interior ring injection pipe 9 can accelerate the velocity of motion of air molecule and gas molecule respectively, and then enable further intensive mixing of gas and air.