CN110906332A - High-efficiency injection combustor - Google Patents

Abstract

The invention relates to an efficient injection burner which comprises an annular outer ring fire cover, wherein the annular outer ring fire cover comprises a base body and a cover body, an annular cavity with an opening at the top is formed in the base body along the length direction of the base body, the cover body is covered on the opening of the annular cavity to form an outer ring gas mixing cavity, an outer ring fire hole communicated with the outer ring gas mixing cavity is formed in the cover body, two outer ring injection pipes are connected to the bottom of the base body and are respectively communicated with the outer ring gas mixing cavity, the outer ring injection pipes are transversely arranged, the two outer ring injection pipes are oppositely arranged, and gas inlets of the two outer ring injection pipes are staggered. The injection efficiency of the outer ring fire cover can be improved, the two outer ring injection pipes are transversely arranged, so that the air outlets of the outer ring injection pipes can directly extend into the outer ring air mixing cavity, the energy loss of the mixed gas in the outer ring injection pipes in the transmission process is reduced, the high-efficiency injection of the outer ring injection pipes is ensured, the air inlets of the two outer ring injection pipes are staggered, the mutual interference between the two air inlets can be avoided, and the injection efficiency is further improved.

Description

High-efficiency injection combustor

Technical Field

The invention relates to the field of gas cookers, in particular to a high-efficiency injection burner.

Background

The traditional upper air inlet gas burner has the problem of low injection efficiency 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 constraint of combustion chamber for main fire draws and penetrates a pipe length shorter in this patent, thereby draw to penetrate the distance short to it, draw to penetrate the power to cause the influence. In addition, some upper air inlet burners on the market supplement air required for combustion by opening holes on the panel, soup or cooking impurities easily enter the shell of the cooker through the panel and are inconvenient to clean.

Disclosure of Invention

The invention aims to solve the first technical problem of providing a high-efficiency injection combustor with high injection efficiency aiming at the prior art.

The second technical problem to be solved by the invention is to provide a high-efficiency injection burner with high combustion efficiency aiming at the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a high-efficient combustor that draws, includes annular outer loop fire lid, its characterized in that, outer loop fire lid includes annular pedestal and lid, has seted up open-top's ring chamber along its length direction on this pedestal, and above-mentioned lid is established on the opening of this ring chamber and is enclosed into outer loop and mix the air cavity, and sets up the outer loop fire hole that mixes the air cavity intercommunication with above-mentioned outer loop on this lid, the bottom of pedestal is connected with two outer loops and draws and penetrate the pipe, and each outer loop draws and penetrates the pipe and communicate with each other with above-mentioned outer loop and mix the air cavity respectively, and each outer loop draws and penetrates the equal horizontal setting of pipe, and two outer loops draw and penetrate the pipe and set up in opposite directions, and air.

In order to further improve the ejection efficiency, the cross section size of the outer ring air mixing cavity is increased, decreased and alternated along the circumferential direction, the air outlet of each outer ring ejection pipe is respectively positioned at the maximum position of the cross section of the outer ring air mixing cavity, and the decreasing directions of the cross sections of the outer ring air mixing cavities of the outer ring air mixing cavity and the outer ring air mixing cavity are both clockwise or anticlockwise. Therefore, two airflows flowing out of the two outer ring injection pipes can flow in the same direction (clockwise or anticlockwise) along with the change of the inner shape of the outer ring air mixing cavity and are mixed with each other, so that the injection effect is improved. In addition, the volume of the outer ring air mixing cavity can be reduced to a certain extent due to the alternating change of the outer ring air mixing cavity, so that the detonation phenomenon generated in the combustion process due to the overlarge volume of the outer ring air mixing cavity is prevented.

The alternating change of the cross section of the outer ring air mixing cavity can be realized in various forms, and for the convenience of processing and manufacturing, the bottom surface of the ring cavity is preferably formed with protrusions and depressions which are alternately spaced along the circumferential direction.

In order to further enhance the injection effect, each recess inclines from outside to inside, the width of each recess decreases progressively along the clockwise direction or the anticlockwise direction, the height of the protrusion adjacent to each recess increases progressively along the same direction as the recess, the width of each protrusion also increases progressively synchronously, and a pair of adjacent recesses and protrusions are spliced to form a section of arc section of the bottom surface of the annular cavity. Thereby can make two outer rings draw and penetrate two strands of air currents that the pipe flows out can be respectively in outer ring air mixing cavity along same direction rotatory flow to enable the better mutual promotion of two strands of air currents, further reinforcing draws the effect of penetrating.

Furthermore, the end face of the highest position of the protrusion is a vertical face, so that the resistance at the air outlet of the outer ring injection pipe can be reduced, and the air flow can enter the outer ring air mixing cavity and flow along the outer ring air mixing cavity.

Preferably, the burner further comprises an inner ring fire cover, the outer ring fire cover is arranged around the inner ring fire cover, a gap is reserved between the outer ring fire cover and the inner ring fire cover along the circumferential direction, the two outer ring injection pipes are respectively arranged on two sides of the inner ring fire cover, the inner ring fire cover comprises a cylindrical base and an end cover covering the base, an inner ring gas mixing cavity is formed by the end cover and the base in a surrounding mode, and an inner ring fire hole communicated with the inner ring gas mixing cavity is formed in the end cover.

Furthermore, the burner also comprises an inner ring injection pipe which is vertically arranged, the inner ring injection pipe is arranged below the base and is an integral part with the base, and the air outlet end of the inner ring injection pipe penetrates through the base and is communicated with the inner ring gas mixing cavity.

The combustor further comprises a nozzle seat positioned below the inner ring injection pipe, an inner ring nozzle is vertically arranged in the middle of the top surface of the nozzle seat and is opposite to an air inlet of the inner ring injection pipe, two outer ring nozzles are transversely arranged on two sides of the inner ring nozzle respectively and correspond to the outer ring injection pipes one by one, and the outer ring nozzles are opposite to the air inlets of the corresponding outer ring injection pipes respectively.

Preferably, the nozzle holder has a disk-like outer shape, and an annular liquid receiving plate is attached to an outer periphery of the nozzle holder, and an outer periphery of the liquid receiving plate is located below or outside the outer ring fire cover.

Further, preferably, an annular cover body is arranged on the outer periphery of the seat body, the cover surface of the cover body is inclined outwards from top to bottom along the circumferential direction, and the projection of the outer periphery of the cover body on the plane of the liquid receiving disc is located on the inner side of the outer periphery of the liquid receiving disc. The cover body has the following three functions: (1) the secondary air is supplemented to the outer ring fire hole along the cover surface, so that the combustion of the outer ring fire is promoted; (2) the overflow liquid dropping to the outer ring fire cover can be guided to flow onto the liquid bearing disc along the cover surface; (3) the air is guided into the combustor, and the supply of primary air and secondary air of the combustor is promoted.

Preferably, the cover body is provided with an inner flame area and an outer flame area, the inner flame area and the outer flame area are both provided with the outer ring flame holes, the inner flame area is located at the inner side end of the cover body and is distributed annularly along the circumferential direction, and the outer flame area is located at the outer side of the inner flame area and is distributed at intervals along the circumferential direction. The smooth fire transfer of the outer ring fire can be ensured by arranging the inner flame area, the supply of secondary air of the outer ring fire can be ensured by arranging the outer flame areas at intervals, and the full combustion of the outer ring fire is ensured.

Further, preferably, at least four pairs of adjacent outer flame zones are formed with anti-burning zones, each anti-burning zone is uniformly distributed along the circumferential direction and is respectively used for being opposite to each support leg of the pot support one by one, so that the support legs of the pot support can be prevented from being directly burned by flames, and the two anti-burning zones are respectively opposite to the air outlets of the two outer ring air mixing chambers, so that the temperature at the air outlets of the two outer ring injection pipes can be prevented from being high, and the fire hole is prevented from being misfired due to the high air outlet speed at the air outlets.

Compared with the prior art, the invention has the advantages that: the burner is provided with the two outer ring injection pipes, so that the injection efficiency of the outer ring fire cover can be improved, the two outer ring injection pipes are transversely arranged, so that the air outlets of the outer ring injection pipes can directly extend into the outer ring air mixing cavity, the energy loss of mixed gas in the outer ring injection pipes in the transmission process is reduced, the efficient injection of the outer ring injection pipes is ensured, the air inlets of the two outer ring injection pipes are staggered, so that the mutual interference of the two outer ring injection pipes can be avoided, and the injection efficiency is further improved.

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 schematic view of the structure of FIG. 2 in another direction;

fig. 4 is another partial structure exploded view of the gas range according to the 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 a partial structure of a gas range (a cover body is not shown) in the embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along A-A of FIG. 6;

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

FIG. 9 is a top view of a burner (shroud not shown) according to an embodiment of the present invention;

FIG. 10 is a schematic view of the structure of a burner in an embodiment of the invention (the enclosure is not shown);

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

FIG. 12 is an exploded view of a burner according to an embodiment of the invention (the housing not shown);

FIG. 13 is a schematic structural view of an integral piece in an embodiment of the invention;

fig. 14 is a schematic structural view in another direction of fig. 13.

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 bottom shell 11 and a panel 12, two mounting holes 120 are opened on the panel 12, and a high-efficiency injection burner is respectively installed in each mounting hole 120.

The high-efficiency injection burner comprises an annular outer ring fire cover 2, an inner ring fire cover 3, an inner ring injection pipe 7, an outer ring injection pipe 4 and a nozzle seat 5. The outer ring fire cover 2 includes an annular base 22 and a cover 21, wherein the base 22 is provided with an annular cavity 220 with an open top along a length direction thereof, the cover 21 is covered on the opening of the annular cavity 220 to form an outer ring air mixing cavity 20, and the cover 21 is provided with an outer ring fire hole 210 communicated with the outer ring air mixing cavity 20. The inner ring fire cover 3 is arranged at the center of the outer ring fire cover 2, a gap is reserved between the two along the circumferential direction, the inner ring fire cover 3 comprises a cylindrical base 31 and an end cover 32 covering the base 31, the end cover 32 and the base 31 enclose an inner ring air mixing cavity 30, and an inner ring fire hole 320 communicated with the inner ring air mixing cavity 30 is formed in the end cover 32.

The bottom of the seat body 22 is connected with two outer ring injection pipes 4, each outer ring injection pipe 4 is respectively communicated with the outer ring air mixing cavity 20, each outer ring injection pipe 4 is transversely arranged, the two outer ring injection pipes 4 are oppositely arranged and are parallel to each other, and the air inlets 41 of the two outer ring injection pipes are staggered with each other. Be provided with two outer rings in the combustor of this embodiment and draw and penetrate pipe 4, thereby can improve the ejection efficiency that draws of outer ring fire lid 2, two outer rings draw and penetrate the equal horizontal setting of pipe 4, thereby enable each outer ring and draw the gas outlet 42 that penetrates pipe 4 and directly stretch into outer ring gas mixing chamber 20, reduce the outer ring and draw the energy loss of the mist in transmission process in penetrating pipe 4, guarantee that the outer ring draws the high efficiency that penetrates pipe 4 and draw and penetrate, two outer rings draw the air inlet 41 that penetrates pipe 4 and stagger each other, thereby can avoid mutual interference between them, further improve and draw and penetrate efficiency.

The inner ring injection pipe 7 is vertically arranged below the base 31, the inner ring injection pipe 7 and the base 31 are integrated, and the air outlet end of the inner ring injection pipe 7 penetrates through the base 31 to be communicated with the inner ring air mixing cavity 30, so that mixed air in the inner ring injection pipe 7 can be directly introduced into the inner ring air mixing cavity 30, and the energy loss of the air in the inner ring injection pipe 7 in the transmission process is avoided.

The cross section size of the outer ring air mixing cavity 20 is increased and decreased alternately along the circumferential direction, the air outlet 42 of each outer ring ejector pipe 4 is respectively positioned at the maximum position of the cross section of the outer ring air mixing cavity 20, and the decreasing directions of the cross sections of the outer ring air mixing cavities 20 of the two outer ring ejector pipes are clockwise or anticlockwise. Thus, two airflows flowing out of the two outer ring injection pipes 4 can flow in the same direction (clockwise or anticlockwise) along with the change of the inner shape of the outer ring air mixing cavity 20 and are mixed with each other, so that the injection effect is improved. The alternation of the cross section of the outer annular air mixing chamber 20 can be realized in various forms, and for the convenience of manufacturing, it is preferable that the bottom surface of the annular chamber 220 is formed with protrusions 221 and depressions 222 alternately spaced along the circumferential direction. Further, each depression 222 inclines from outside to inside, the width of each depression 222 decreases progressively in the clockwise direction or the counterclockwise direction, the height of the protrusion 221 adjacent to each depression 222 increases progressively in the same direction as that of the depression 222, the width of each depression increases progressively synchronously, and a pair of adjacent depressions 222 and the protrusion 221 are spliced to form a section of arc section on the bottom surface of the annular cavity 220, so that two airflows flowing out from the two outer ring injection pipes 4 can respectively rotate and flow in the same direction in the outer ring air mixing cavity 20, so that the two airflows are better promoted mutually, and the injection effect is further enhanced. In addition, the alternating of the outer annular air mixing chamber 20 can reduce the volume of the outer annular air mixing chamber 20 to some extent, thereby preventing the detonation phenomenon generated during the combustion process due to the excessive volume of the outer annular air mixing chamber 20.

Furthermore, the end face of the highest position of the protrusion 221 is a vertical face 223, that is, one side of the air outlet 42 of each outer ring ejector tube 4, which is led into the outer ring air mixing cavity 20, is the vertical face 223, so that the resistance at the air outlet 42 of the outer ring ejector tube 4 can be reduced, and the air flow can enter the outer ring air mixing cavity 20 and flow along the outer ring air mixing cavity 20.

The two outer rings are respectively arranged at two sides of the inner ring fire cover 3, the periphery of the base 31 is fixed with an annular cover plate 8, the inner ring fire holes 320 are located above the cover plate 8, the two outer rings are respectively fixed at the bottom of the cover plate 8, and the top surface of the cover plate 8 is a smooth surface. The primary air and the secondary air of the combustor can be divided through the cover plate 8, specifically, the air enters the combustor from the gap between the outer ring fire cover 2 and the table top of the panel 12, the ejection pipes 4 are located at the bottom of the cover plate 8 through the two outer rings, so the air can be divided through the cover plate 8, one part of the air enters the lower part of the cover plate 8 in a primary air mode, the air enters the ejection pipes 4 through the air inlets 41 of the ejection pipes 4 of the outer rings respectively, the other part of the air enters the gap between the inner ring fire cover 3 and the outer ring fire cover 2 in a secondary air mode, the secondary air is divided through the cover plate 8, one part of the air is supplemented to the inner ring fire hole 320 along the top surface of the cover plate 8, and the other part of the air is supplemented to the outer ring fire hole 210 along the inner ring surface of the outer ring fire cover 2. Therefore, the problem of air robbery in the combustor is avoided by shunting the primary air and the secondary air, so that high-efficiency injection is ensured.

Further, most of the outer ring injection pipes 4 are located at the bottom of the cover plate 8, the outer ring injection pipes 4 are wrapped on the two sides of the cover plate 8 downwards along the outer surfaces of the corresponding outer ring injection pipes 4, and the side edge of each side cover plate 8 is turned over towards the transverse direction to form a turned edge 81. The design not only can make the inner structure of the burner more compact, but also can better prevent the overflowing liquid from entering the inner ring fire cover 3, and the design of the flanging 81 can make the cover plate 8 better divide the primary air and the secondary air.

The burner also comprises a nozzle holder 5 which is positioned below the inner ring injection pipe 7 and is circular in shape. The center of the top surface of the nozzle holder 5 is vertically provided with an inner ring nozzle 51, the end of the air inlet 71 of the inner ring injection pipe 7 is suspended over the inner ring nozzle 51, the top surface of the nozzle holder 5 is respectively provided with vertically extending mounting columns 520 at two sides of the inner ring nozzle 51, each mounting column 520 is respectively and transversely provided with an outer ring nozzle 52, each outer ring nozzle 51 is in one-to-one correspondence with each outer ring injection pipe 4, each outer ring nozzle 51 is opposite to the air inlet 41 of the corresponding outer ring injection pipe 4, and the two outer ring nozzles 51 are both positioned below the cover plate 8. The outer ring nozzle 51 is arranged below the cover plate 8, so that the problem that the temperature of the outer ring nozzle 51 is too high, and the load of the combustor is greatly reduced due to the fact that the temperature of the outer ring nozzle 51 is too high is common to the upper air inlet combustors is solved through the design.

Further, the air inlet 41 of the outer ring injection pipe 4 extends along the outer peripheral surface of the air inlet end of the inner ring injection pipe 7 relative to the end edge of the inner side end of the cover plate 8 to form the blocking edges 43, the lower end edges of the blocking edges 43 are located below the air inlet 71 of the inner ring injection pipe 7, so that primary air after being divided by the cover plate 8 can be divided again through the blocking edges 43, a part of air enters the outer ring injection pipe 4 through the air inlet 41 of the outer ring injection pipe 4, the other part of air enters the inner ring injection pipe 7 through the air inlet 71 of the inner ring injection pipe 7, and the condition that the injection efficiency is influenced by the fact that primary air is rushed by the inner ring injection pipe 7 and the outer ring injection pipe 4 is avoided.

The projection of the outer ring fire cover 2 on the plane where the top surface of the nozzle seat 5 is located on the periphery of the top surface of the nozzle seat 5, namely the burner in the invention is in a shape of big top and small bottom, so that air can be promoted to enter the inside of the burner through the lower part of the outer ring fire cover 2, and the air inside the burner can be supplemented. In this embodiment, the nozzle holder 5 is sized to match the cover plate 8, and an annular liquid receiving disc 13 is mounted on the outer periphery of the nozzle holder, and the outer periphery of the liquid receiving disc 13 is located below or outside the outer fire cover 2. Specifically, three mounting lugs 132 are circumferentially arranged on the inner edge of the liquid bearing disc 13 at intervals, each mounting lug 132 is provided with a first mounting hole 131, the outer edge of the nozzle holder 5 is circumferentially arranged with second mounting holes 53 corresponding to the first mounting holes 131, and during mounting, each mounting lug 132 is separately stacked at a corresponding position on the top surface of the nozzle holder 5, so that each first mounting hole 131 and the corresponding second mounting hole 53 are vertically penetrated through, and finally fixed by a fastener (not shown).

Further, in this embodiment, the outer periphery of the seat 22 is provided with an annular cover 9, the cover surface of the cover 9 is inclined outward from top to bottom along the circumferential direction, and a projection of the outer periphery of the cover 9 on the plane of the liquid receiving tray 13 is located inside the outer periphery of the liquid receiving tray 13. In this embodiment, the cover 9 has the following three functions: (1) the secondary air is supplemented to the outer ring fire hole along the cover surface, so that the combustion of the outer ring fire is promoted; (2) the overflow liquid dropping to the outer ring fire cover 2 can be guided to flow onto the liquid bearing disc 13 along the cover surface; (3) the air is guided into the combustor, and the supply of primary air and secondary air of the combustor is promoted. For the convenience of assembly, in this embodiment, the cover 9 and the seat 22 are an integral structure.

In addition, an ignition needle 15 and a thermocouple 16 are respectively mounted on the nozzle holder 5, and the upper ends of the ignition needle 15 and the thermocouple 16 respectively penetrate through a first through hole 82 and a second through hole 83 in the cover plate 8 so as to be respectively positioned on two sides of the inner ring fire cover 3.

In this embodiment, the seat body 22, the base 31, the outer-ring ejection pipes 4, and the inner-ring ejection pipe 7 are integrated, and the integrated part is detachably connected to the nozzle holder 5. Therefore, the burner is convenient to assemble and disassemble, the burner is convenient to clean, particularly when the burner is installed on the panel 12, the integrated piece is disassembled, only the top part of the nozzle seat 5 is exposed on the liquid bearing disc 13, and the burner is very convenient to clean. Specifically, the bottom of the integrated member is provided with a support column 6 extending vertically downward, the top surface of the nozzle holder 5 is provided with a connection hole 55 for the support column 6 to be inserted, and the integrated member can be detachably connected with the nozzle holder 5 by inserting the support column 6 into the corresponding connection hole 55.

The cover 21 is provided with an inner flame area 211 and an outer flame area 212, the inner flame area 211 and the outer flame area 212 are both provided with the outer ring flame holes 210, wherein the inner flame area 211 is located at the inner end of the cover 21 and annularly distributed along the circumferential direction, and the outer flame area 212 is located outside the inner flame area 211 and circumferentially distributed at intervals. The smooth fire transfer of the outer ring fire can be ensured by arranging the inner flame zone 211, and the supply of secondary air of the outer ring fire can be ensured by arranging the outer flame zone 212 at intervals, so that the full combustion of the outer ring fire is ensured. Further, the burning prevention areas 213 are formed between four adjacent pairs of the outer flame areas 212, each burning prevention area 213 is uniformly distributed along the circumferential direction and is used for being opposite to the support leg of the pot support 14, so that the support leg of the pot support 14 can be prevented from being directly burned by the flame, and the two burning prevention areas 213 are opposite to the air outlets 42 of the two outer ring air mixing chambers 20, so that the temperature at the air outlets 42 of the two outer ring ejector pipes 4 can be prevented from being high, and the fire hole is prevented from being misfired due to the high air outlet speed at the air outlets 42. In addition, in the present invention, the cover surface of the cover body 21 is inclined from top to bottom, and the inner and outer peripheries of the cover surface extend vertically downward and rest on the inner ring periphery of the annular cavity 220, so as to guide the overflow on the cover body 21 to flow to the cover surface of the cover body 9 along the cover surface, and then to be collected to the liquid receiving plate 13 through the cover surface, thereby preventing the overflow from being retained on the cover surface to block the outer ring fire hole 210.

Claims (12)

1. An efficient injection combustor comprises an annular outer ring fire cover (2), and is characterized in that the outer ring fire cover (2) comprises an annular base body (22) and a cover body (21), an annular cavity (220) with an opening at the top is formed in the base body (22) along the length direction of the base body, the cover body (21) is covered on the opening of the annular cavity (220) to form an outer ring gas mixing cavity (20), an outer ring fire hole (210) communicated with the outer ring gas mixing cavity (20) is formed in the cover body (21),

the bottom of the seat body (22) is connected with two outer ring injection pipes (4), each outer ring injection pipe (4) is communicated with the outer ring air mixing cavity (20), each outer ring injection pipe (4) is transversely arranged, the two outer ring injection pipes (4) are oppositely arranged, and air inlets (41) of the two outer ring injection pipes are staggered.

2. The efficient injection burner as claimed in claim 1, wherein the cross-sectional size of the outer ring air mixing cavity (20) is alternately changed in an increasing and decreasing manner along the circumferential direction, the air outlet (42) of each outer ring injection pipe (4) is respectively located at the maximum position of the cross-sectional area of the outer ring air mixing cavity (20), and the decreasing directions of the cross-sectional areas of the outer ring air mixing cavities (20) of the outer ring air mixing cavity and the outer ring air mixing cavity are both clockwise or counterclockwise.

3. The high-efficiency injection burner as claimed in claim 2, wherein the bottom surface of the annular chamber (220) is formed with protrusions (221) and depressions (222) alternately spaced in the circumferential direction.

4. The efficient injection burner as claimed in claim 3, wherein each of the recesses (222) is inclined from outside to inside and the width thereof decreases progressively in a clockwise or counterclockwise direction, the height of the protrusion (221) adjacent to each recess (222) increases progressively in the same direction as the recess (222) and the width thereof also increases progressively simultaneously, and a pair of adjacent recesses (222) and protrusions (221) are spliced to form a circular arc section of the bottom surface of the annular cavity (220).

5. The high-efficiency injection burner as claimed in claim 4, wherein the end surface of the highest position of the protrusion (221) is a vertical surface (223).

6. The efficient injection burner according to any one of claims 1 to 5, further comprising an inner ring fire cover (3), wherein the outer ring fire cover (2) is arranged around the outer circumference of the inner ring fire cover (3), a gap is reserved between the outer ring fire cover (2) and the inner ring fire cover (3) along the circumferential direction, two outer ring injection pipes (4) are respectively arranged on two sides of the inner ring fire cover (3),

the inner ring fire cover (3) comprises a cylindrical base (31) and an end cover (32) covered on the base (31), the end cover (32) and the base (31) enclose an inner ring air mixing cavity (30), and an inner ring fire hole (320) communicated with the inner ring air mixing cavity (30) is formed in the end cover (32).

7. The efficient injection burner as claimed in claim 6, further comprising an inner ring injection pipe (7) vertically arranged, wherein the inner ring injection pipe (7) is arranged below the base (31) and is integrated with the base (31), and an air outlet (72) end of the inner ring injection pipe (7) penetrates through the base (31) to be communicated with the inner ring air mixing cavity (30).

8. The efficient injection combustor according to claim 7, further comprising a nozzle holder (5) located below the inner ring injection pipe (7), wherein an inner ring nozzle (51) is vertically arranged in the middle of the top surface of the nozzle holder (5), the inner ring nozzle (51) is opposite to an air inlet (71) of the inner ring injection pipe (7), two sides of the inner ring nozzle (51) are respectively and transversely provided with an outer ring nozzle (52), each outer ring nozzle (52) is in one-to-one correspondence with each outer ring injection pipe (4), and each outer ring nozzle (52) is opposite to an air inlet (41) of the corresponding outer ring injection pipe (4).

9. The high-efficiency injection burner as claimed in claim 8, wherein the nozzle holder (5) is disc-shaped in shape, an annular liquid bearing disc (13) is mounted on the outer periphery of the nozzle holder, and the outer periphery of the liquid bearing disc (13) is positioned below or outside the outer fire cover (2).

10. The efficient injection burner as claimed in claim 9, wherein the outer periphery of the seat body (22) is provided with an annular cover body (9), the cover surface of the cover body (9) is inclined outwards from top to bottom along the circumferential direction, and the projection of the outer periphery of the cover body (9) on the plane of the liquid bearing disc (13) is positioned inside the outer periphery of the liquid bearing disc (13).

11. The efficient injection combustor according to any one of claims 1 to 5, wherein the cover body (21) is provided with an inner flame area (211) and an outer flame area (212), the inner flame area (211) and the outer flame area (212) are uniformly provided with the outer ring flame holes (210), wherein the inner flame area (211) is located at the inner side end of the cover body (21) and is annularly distributed along the circumferential direction, and the outer flame area (212) is located at the outer side of the inner flame area (211) and is circumferentially distributed at intervals.

12. The efficient induction burner as claimed in claim 11, wherein at least four pairs of adjacent outer flame zones (212) are formed with flame-proof zones (213), each flame-proof zone (213) is uniformly distributed along the circumferential direction and is respectively used for being opposite to each support leg of the pot support (14), and two of the flame-proof zones (213) are respectively opposite to the air outlets (42) of the two outer ring air mixing chambers (20).

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