CN215216242U - Burner fire cover and burner using same - Google Patents

Abstract

The utility model relates to a combustor fire lid and applied combustor that has this combustor fire lid, including fire lid body, the annular perisporium of fire lid body is equipped with main fire hole, its characterized in that along circumference interval: the bottom of the annular perisporium of fire lid body has the supplementary groove that is used for supplementing secondary air to main fire hole to the bottom of annular perisporium has annular interior step, supplyes the groove and supplyes the groove including the first supplementary groove that is located first wall on the step and the second that is located the second wall under the step, compares with prior art, the utility model has the advantages of: the supplementary groove can supplement secondary air to the main fire hole from the inner direction and the outer direction, and can better promote the combustion of the main fire hole, so that the flame of the combustor is short, uniform and powerful, and the defects of yellow flame, tempering and the like can not occur; still provide a combustor, fire lid body and second fire lid communicate respectively through the gas passageway of connector and base to can stabilize the burning better.

Description

Burner fire cover and burner using same

Technical Field

The utility model relates to a combustor of gas cooking utensils especially relates to a combustor fire lid and use combustor that has this combustor fire lid.

Background

At present, most of the kitchen ranges on the market are double-ring fire burners, namely, an inner ring fire burner and an outer ring fire burner are provided, wherein, in order to increase the contact area between the flame of an inner ring and the bottom of a pot, improve the thermal efficiency and achieve the purpose of energy saving, the prior patent discloses a Chinese utility model patent ZL201620759629.9 (with the publication number of CN205807511U), which discloses a double-rotary fire burner, which comprises a burner base, wherein the burner base is provided with an outer combustion air passage and an inner combustion air passage, the outer combustion air passage is provided with an outer fire distribution cover, the inner side of the outer fire distribution cover is provided with a first inner ring conical surface, the first inner ring conical surface is provided with a plurality of outer rotary fire bar-shaped holes in the circumferential direction, the inner combustion air passage is provided with an inner fire distribution cover, the inner side of the fire distribution cover is provided with a second inner ring conical surface, and the second inner ring is provided with a plurality of inner rotary fire bar-shaped holes in the circumferential direction; the burner adopting the structure adopts the rotary fire structure as the inner flame divider; under the same size of the burner base, the contact area of the flame of the inner ring and the boiler bottom is increased, the heat efficiency is improved, and the purpose of energy conservation is achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that provides a can supply secondary air's combustor fire lid more effectively to the structure of turning round fire to above-mentioned prior art current situation.

The second technical problem to be solved by the present invention is to provide a burner fire cover capable of ensuring effective fire transmission of the inner ring and the outer ring in view of the above current situation of the prior art.

The third technical problem to be solved in the utility model is to provide an application has above-mentioned combustor fire lid to above-mentioned prior art current situation, can stabilize burning structure at the cooking utensils combustor.

The fourth technical problem to be solved by the utility model is to provide a cooking utensils combustor that can make the secondary air rational distribution of side air to above-mentioned prior art current situation.

The fifth technical problem to be solved by the utility model is to provide a cooking utensils combustor that can avoid the overflow to block up to above-mentioned prior art current situation.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: this combustor fire lid, including fire lid body, the annular perisporium of fire lid body is equipped with main fire hole, its characterized in that along circumference interval: the bottom of the annular peripheral wall of the fire cover body is provided with a supplement groove for supplementing secondary air to the main fire hole, the bottom of the annular peripheral wall is provided with an annular inner step, and the supplement groove comprises a first supplement groove positioned on a first wall surface above the step and a second supplement groove positioned on a second wall surface below the step.

Further, the first supplementary grooves and the main fire holes are arranged in a staggered and spaced mode, and the second supplementary grooves are arranged in one-to-one alignment with the first supplementary grooves.

In order to solve the second technical problem, preferably, the fire cover body further includes an outer peripheral wall opposite to the annular peripheral wall and a top wall connecting the annular peripheral wall and the outer peripheral wall, the annular peripheral wall, the outer peripheral wall and the top wall together enclose a first air mixing cavity communicated with the main fire hole, and a second fire cover is further arranged on the periphery of the fire cover body and connected with the fire transmission chamber at intervals along the circumferential direction.

In order to make the fire transfer chamber have sufficient fuel gas and secondary air, preferably, the fire transfer chamber includes a first side wall, a second side wall and a bottom wall, the first side wall and the second side wall are directly connected with the outer peripheral wall of the fire cover body and the second fire cover, the bottom wall is connected with the first side wall and the second side wall, an inner side opening of the fire transfer chamber is arranged on the annular peripheral wall, an outer side opening of the fire transfer chamber is in fluid communication with the second fire cover, and an air inlet hole for external secondary air to flow into the fire transfer chamber is arranged on the bottom wall of the fire transfer chamber.

In order to better suck the secondary air from the outside into the fire transfer chamber, the air inlet hole is preferably flared with a downward flaring.

In order to realize that after external secondary air is sucked into the fire transfer chamber, the secondary air can be more smoothly led into the top of the fire transfer chamber from bottom to top or the secondary air is led into the fire transfer chamber from the outside from top to bottom, preferably, a first concave groove is locally arranged on a first side wall of the fire transfer chamber, a second concave groove is correspondingly locally arranged on a second side wall of the fire transfer chamber, and the first concave groove and the second concave groove jointly form an air inlet channel communicated with the air inlet hole.

In order to realize that the burner fire cover has inner and outer ring fires, preferably, the second fire cover comprises a first inner ring-shaped wall used for being directly connected with the second side wall, a second inner ring-shaped wall arranged opposite to the first inner ring-shaped wall, and a ring-shaped top wall connected with the first inner ring-shaped wall and the first inner ring-shaped wall, the second inner ring-shaped wall and the ring-shaped top wall jointly enclose a second gas mixing cavity, and at least two fire outlets communicated with the second gas mixing cavity are formed in the ring-shaped top wall. The annular top wall of the second fire cover is provided with at least two fire outlets, so that the second fire cover is a mesh fire cover which is fully distributed with fire outlets, a direct-injection fire outlet mode can be formed, and the heat efficiency of the second fire cover for heating the pot bottom is improved.

In order to realize that the second fire cover can convey fuel gas to the fire transfer chamber, preferably, the part of the first inner annular wall corresponding to the fire transfer chamber is provided with an air inlet communicated with the second air mixing chamber.

To solve the third technical problem, preferably, the present invention provides a burner with a burner cap as above, wherein: comprises the following steps:

the base is provided with a first gas channel communicated with the fire cover body and a second gas channel communicated with the second fire cover;

the connecting body is arranged on the base and comprises an annular body with a central hole in the center, the upper surface of the annular body is provided with a first convex ring, a second convex ring, a third convex ring and a fourth convex ring at intervals from inside to outside along the radial direction from the periphery of the central hole, the fire cover body is correspondingly placed on the first convex ring and the second convex ring, and a first gas mixing cavity of the fire cover body is communicated with the first gas channel; and the second fire cover is correspondingly placed on the third convex ring and the fourth convex ring, and a second gas mixing cavity of the second fire cover is communicated with the second gas channel.

In order to realize that the fuel gas in the base flows into the fire cover body and the second fire cover through the connecting body, preferably, the annular body of the connecting body is circumferentially provided with first openings communicating the first gas mixing cavity and the first fuel gas channel at intervals between the first convex ring and the second convex ring, and is circumferentially provided with second openings communicating the second gas mixing cavity and the second fuel gas channel at intervals between the third convex ring and the fourth convex ring.

Furthermore, the outer peripheral wall of the fire cover body is placed on the second convex ring, the first inner annular wall of the second fire cover is placed on the third convex ring, an air supplementing cavity is formed between the fire cover body and the second fire cover, and the fire transfer chamber is communicated with the air supplementing cavity through the air inlet hole.

For solving the fourth technical problem, preferably, the connector is further provided with a plurality of radial secondary air supply channels at intervals along the circumferential direction, the secondary air supply channels are used for connecting the air supply cavity with the outside, the connector is provided with a separator for separating the secondary air supply channels, the separator can separate the secondary air supply channels into two relatively independent spaces which are respectively communicated with the fire cover body and the second fire cover.

The partitioning member preferably includes a partition, which is a horizontal partition, from the viewpoint of a simple structure.

In order to realize that the baffle plate has the function of guiding overflowing liquid besides the function of separation, the outer side end of the baffle plate preferably extends into the secondary air supplementing channel and is gradually inclined downwards from inside to outside.

In order to achieve the connection of the partition plate, preferably, the inner end of the partition plate is connected to an extension wall extending downward from the second bead.

In order to realize the connection between the fire cover body and the connecting body, preferably, the second wall surface of the annular inner step of the fire cover body is abutted to the periphery of the central hole, the first wall surface of the annular inner step of the fire cover body is abutted to the first convex ring, so that a flame stabilizing cavity of the main fire hole of the fire cover body is enclosed, and the flame stabilizing cavity is communicated with the first supplement groove and the second supplement groove.

In order to supplement secondary air to the fire cover body, preferably, an air outlet is formed at the top of the fire cover body, a central cavity is enclosed by the annular peripheral wall, and an air supplement channel which is vertically communicated and communicated with the air outlet is formed by the center of the base and the central cavity.

In order to regulate the amount of air in the air make-up channel, a regulating member is preferably arranged in the air make-up channel.

Furthermore, the adjusting piece comprises a screwed part screwed with the pipe wall of the air supplementing channel and a flow guide part used for guiding overflow liquid to the secondary air supplementing channel, and the flow guide part is gradually inclined downwards towards the secondary air supplementing channel from the center to the periphery. The air quantity of the air replenishing channel is changed through the up-and-down movement mode of the adjusting piece, when overflowing occurs in the cooking process, the flow guide part of the adjusting piece can partially guide the overflowing liquid to the secondary air replenishing channel, so that the secondary air replenishing channel can be used as a channel for laterally replenishing secondary air to the fire cover body and the second fire cover, and can also be used as a channel for discharging the overflowing liquid.

Compared with the prior art, the utility model has the advantages of: the annular peripheral wall of the burner fire cover is provided with main fire holes at intervals along the circumferential direction, in order to better provide secondary air for the main fire holes, the bottom of the annular peripheral wall of the fire cover body is provided with a supplement groove for supplementing the secondary air for the main fire holes, and the supplement groove comprises a first supplement groove positioned on a first wall surface above a step and a second supplement groove positioned on a second wall surface below the step; the utility model discloses still provide an use the combustor that has like above-mentioned combustor fire lid, fire lid body and second fire lid communicate respectively through the gas passageway of connector with the base to can stabilize the burning better.

Drawings

Fig. 1 is a schematic structural view of a burner for a gas stove according to an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view at an angle of FIG. 1;

FIG. 4 is a cross-sectional view at another angle from FIG. 1;

FIG. 5 is a schematic view of the adjustment member of FIG. 4 in a downward position;

FIG. 6 is a schematic view of an angle of a burner fire cover in an embodiment of the invention;

FIG. 7 is a schematic view of another angle of the burner fire cover in an embodiment of the invention;

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

FIG. 9 is a cross-sectional view at another angle of FIG. 6;

FIG. 10 is a schematic structural view of a connecting body according to an embodiment of the present invention;

FIG. 11 is a schematic view of another angle of FIG. 10;

fig. 12 is a cross-sectional view of fig. 11.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in FIGS. 1 to 12, the preferred embodiment of the present invention is shown. The burner fire cover of the embodiment comprises a fire cover body 1, the annular peripheral wall 11 of the fire cover body 1 is provided with main fire holes 111 at intervals along the circumferential direction, the bottom of the annular peripheral wall 11 of the fire cover body 1 is provided with a supplement groove for supplementing secondary air to the main fire holes 111, the bottom of the annular peripheral wall 11 is provided with an annular inner step 112, and the supplement groove comprises a first supplement groove 1121 on a first wall surface 112a above the step and a second supplement groove 1122 on a second wall surface 112b below the step. The first supplementary grooves 1121 are alternately spaced apart from the main fire holes 111, and the respective second supplementary grooves 1122 are aligned with the respective first supplementary grooves 1121 one by one. The fire cover body 1 further comprises an outer peripheral wall 12 opposite to the annular peripheral wall 11 and a top wall 13 connecting the annular peripheral wall 11 and the outer peripheral wall 12, the annular peripheral wall 11, the outer peripheral wall 12 and the top wall 13 jointly enclose a first air mixing cavity 14 communicated with the main fire hole 111, a second fire cover 2 is further arranged on the periphery of the fire cover body 1, and the second fire cover 2 is connected with the fire transfer chamber 3 arranged at intervals along the circumferential direction. In order to make the fire transfer chamber 3 have sufficient gas and secondary air, preferably, the fire transfer chamber 3 includes a first side wall 31, a second side wall 32 directly connected to the outer peripheral wall 12 of the fire cover body 1 and the second fire cover 2, and a bottom wall 33 connecting the first side wall 31 and the second side wall 32, an inner opening 34 of the fire transfer chamber 3 is opened on the annular peripheral wall 11, an outer opening 35 of the fire transfer chamber 3 is in fluid communication with the second fire cover 2, and the bottom wall 33 of the fire transfer chamber 3 is opened with an air inlet hole 36 for external secondary air to flow into the fire transfer chamber 3. In order to better suck the secondary air from the outside into the fire transfer chamber 3, the air inlet hole 36 is in a horn shape with a downward horn mouth, and in order to realize that the secondary air from the outside can be more smoothly guided into the top of the fire transfer chamber 3 from the bottom to the top after being sucked into the fire transfer chamber 3, or the secondary air is guided into the fire transfer chamber 3 from the outside from the top to the bottom, the first side wall 31 of the fire transfer chamber 3 is locally provided with a first concave groove 311, correspondingly, the second side wall 32 is locally provided with a second concave groove 321, and the first groove 311 and the second groove 321 jointly form an air inlet channel 323 communicated with the air inlet hole 36.

In order to realize that the burner fire cover has inner and outer fire rings, preferably, the second fire cover 2 comprises a first inner annular wall 21 directly connected with the second side wall 32, a second inner annular wall 22 arranged opposite to the first inner annular wall 21, and an annular top wall 23 connecting the first inner annular wall 21 and the first inner annular wall 21, the second inner annular wall 22 and the annular top wall 23 together enclose a second gas mixing cavity 24, and the annular top wall 23 is provided with at least two fire outlets 231 communicated with the second gas mixing cavity 24. At least two fire holes 231 are arranged on the annular top wall 23 of the second fire cover 2, so that the second fire cover 2 is a mesh fire cover with fire holes, a direct-injection fire outlet mode can be formed, and the thermal efficiency of the second fire cover 2 for heating the bottom of a pot is improved. In order to realize that the second fire cover 2 can deliver gas to the fire transfer chamber 3, the part of the first inner annular wall 21 corresponding to the fire transfer chamber 3 is provided with an air inlet hole 211 communicated with the second air mixing chamber 24. The embodiment also provides a burner using the burner fire cover, which comprises a base 4 provided with a first gas channel 41 communicated with the fire cover body 1 and a second gas channel 42 communicated with the second fire cover 2, and a connecting body 5 arranged on the base 4, wherein the connecting body 5 comprises an annular body with a central hole 51 in the center, the upper surface of the annular body is provided with a first convex ring 52, a second convex ring 53, a third convex ring 54 and a fourth convex ring 55 which are sequentially arranged from the periphery of the central hole 51 in a radial direction outwards and from the inside outwards at intervals, the fire cover body 1 is correspondingly placed on the first convex ring 52 and the second convex ring 53, and the first gas mixing cavity 14 of the fire cover body 1 is communicated with the first gas channel 41; and the second fire lid 2 is seated on the third bead 54 and the fourth bead 55, respectively, and the second gas mixing chamber 24 of the second fire lid 2 communicates with the second gas passage 42. In order to realize that the gas in the base 4 flows into the fire lid body 1 and the second fire lid 2 through the connecting body 5, the annular body of the connecting body 5 is circumferentially provided with first openings 56 communicating the first gas mixing chamber 14 with the first gas passage 41 at intervals between the first convex ring 52 and the second convex ring 53, and circumferentially provided with second openings 57 communicating the second gas mixing chamber 24 with the second gas passage 42 at intervals between the third convex ring 54 and the fourth convex ring 55. The outer peripheral wall 12 of the fire cover body 1 is placed on the second convex ring 53, the first inner annular wall 21 of the second fire cover 2 is placed on the third convex ring 54, an air supplementing cavity 6 is formed between the fire cover body 1 and the second fire cover 2, and the fire transfer chamber 3 is communicated with the air supplementing cavity 6 through the air inlet 36. For the secondary air rational distribution that can make the side air inlet, connector 5 still is equipped with a plurality of radial secondary tonifying qi passageways 58 that are used for connecting tonifying qi chamber 6 and external world along circumference interval, and connector 5 has the separator 7 of separating secondary tonifying qi passageway 58, and separator 7 can separate secondary tonifying qi passageway 58 into two relatively independent spaces, communicates fire lid body 1 and second fire lid 2 respectively. The partitioning member 7 of the present embodiment includes a partition plate, which is a horizontal partition plate, in view of the simple structure of the partitioning member 7. In order to realize the function of the baffle plate for guiding the overflowing liquid besides the separating function, the outer end 71 of the baffle plate extends into the secondary air supplementing channel 58 and gradually inclines downwards from inside to outside. In addition, to achieve the connection of the partition, the inner end 72 of the partition is connected to the extension wall 531 extending downward from the second bead 53. Wherein, the second wall surface 112b of the annular inner step 112 of the fire cover body 1 abuts against the periphery of the central hole 51, the first wall surface 112a of the annular inner step 112 of the fire cover body 1 abuts against the first convex ring 52, thereby enclosing the flame holding cavity 8 of the main fire hole 111 of the fire cover body 1, and the flame holding cavity 8 is communicated with the first supplementary groove 1121 and the second supplementary groove 1122, thereby realizing the connection of the fire cover body 1 and the connecting body 5; in addition, the top of the fire lid body 1 is also provided with an air outlet 10, the annular peripheral wall 11 encloses a central cavity 110, the center of the base 4 and the central cavity 110 jointly form an air supplement channel 40 which is vertically communicated and communicated with the air outlet 10, the air supplement channel 40 is internally provided with an adjusting piece 80, so that secondary air supplement to the fire lid body 1 is realized, and the air quantity in the air supplement channel 40 can be adjusted by the adjusting piece 80. The adjusting piece 80 of this embodiment includes a screw connection portion 801 screwed with the pipe wall of the air supply passage 40, and a flow guiding portion 802 for guiding the overflow to the secondary air supply passage 58, the flow guiding portion 802 gradually inclines downward from the center to the periphery toward the secondary air supply passage 58, the air amount of the air supply passage 40 is changed by the up-down movement mode of the adjusting piece 80, when the overflow occurs during the cooking process, the flow guiding portion 802 of the adjusting piece 80 can partially guide the overflow to the secondary air supply passage 58, so that the secondary air supply passage 58 can be used as a passage for laterally supplying the secondary air to the fire lid body 1 and the second fire lid 2, and can also be used as a passage for discharging the overflow. The annular peripheral wall 11 of the burner fire cover is provided with main fire holes 111 at intervals along the circumferential direction, in order to better provide secondary air for the main fire holes 111, the bottom of the annular peripheral wall 11 of the fire cover body 1 is provided with a supplement groove for supplementing the secondary air for the main fire holes 111, and the supplement groove comprises a first supplement groove 1121 on a first wall surface 112a above a step and a second supplement groove 1122 on a second wall surface 112b below the step, so that the first supplement groove 1121 and the second supplement groove 1122 can supplement the secondary air to the main fire holes 111 from both the inside and the outside, the combustion of the main fire holes 111 can be better promoted, the flame of the burner is short, uniform and powerful, and the defects of yellow flame, tempering and the like can not occur; the utility model discloses still provide an use the combustor that has like above-mentioned combustor fire lid, fire lid body 1 and second fire lid 2 communicate respectively through the gas passageway of connector 5 with base 4 to can stabilize the burning better.

Referring to fig. 3, as described above, the paths of the primary air, gas and mixed primary air and gas inside the burner are as follows: the low pressure caused by the injection of the first gas channel 41 of the base 4 and the injector corresponding to the second gas channel 42 respectively enters the first gas mixing cavity 14 and the second gas mixing cavity 24 through the first opening 56 and the second opening 57 to premix primary air and gas, the mixed primary air and gas finally pass through the main fire hole 111 or the fire outlet hole 231 of the fire cover body 1 and the second fire cover 2 and are ignited together with the secondary air of the external environment, and meanwhile, the inner ring fire formed by the fire cover body 1 can transfer fire to the second fire cover 2 through the fire transfer chamber 3, so that inner ring fire and outer ring fire are formed; the bottom of the annular peripheral wall 11 of the fire lid body 1 has an annular inner step 112, the annular inner step 112 and the connecting body 5 cooperate to form the flame holding chamber 8, and the first supplementary groove 1121 and the second supplementary groove 1122 of the supplementary groove form a channel for supplying secondary air and a channel for flowing out flame holding fire in the flame holding chamber 8, so as to form the flame holding fire lid body 1.

Claims (19)

1. The utility model provides a combustor fire lid, is including fire lid body (1), annular perisporium (11) of fire lid body (1) are equipped with main fire hole (111) along circumference interval, its characterized in that: the bottom of the annular peripheral wall (11) of the fire cover body (1) is provided with a replenishing groove for replenishing secondary air to the main fire hole (111), the bottom of the annular peripheral wall (11) is provided with an annular inner step (112), and the replenishing groove comprises a first replenishing groove (1121) of a first wall surface (112a) above the step and a second replenishing groove (1122) of a second wall surface (112b) below the step.

2. The burner fire cover of claim 1, wherein: the first supplementary grooves (1121) are alternately spaced apart from the main fire holes (111), and the respective second supplementary grooves (1122) are aligned with the respective first supplementary grooves (1121).

3. The burner fire cover of claim 2, wherein: the fire cover body (1) further comprises an outer peripheral wall (12) opposite to the annular peripheral wall (11) and a top wall (13) connecting the annular peripheral wall (11) and the outer peripheral wall (12), the annular peripheral wall (11), the outer peripheral wall (12) and the top wall (13) jointly enclose a first mixed air cavity (14) communicated with the main fire hole (111), a second fire cover (2) is further arranged on the periphery of the fire cover body (1), and the second fire cover (2) is connected with the fire transmission chamber (3) arranged at intervals along the circumferential direction.

4. The burner fire cover of claim 3, wherein: the fire transmission chamber (3) comprises a peripheral wall (12) directly connected with the fire cover body (1), a first side wall (31) and a second side wall (32) which are connected with the second fire cover (2), and a bottom wall (33) connecting the first side wall (31) and the second side wall (32), an inner side opening (34) of the fire transmission chamber (3) is formed in the annular peripheral wall (11), an outer side opening (35) of the fire transmission chamber (3) is in fluid communication with the second fire cover (2), and an air inlet hole (36) for external secondary air to flow into the fire transmission chamber (3) is formed in the bottom wall (33) of the fire transmission chamber (3).

5. The burner fire cover of claim 4, wherein: the air inlet hole (36) is in a horn shape with a downward horn mouth.

6. The burner fire cover of claim 5, wherein: the first side wall (31) of the fire transfer chamber (3) is locally provided with a first concave groove (311), correspondingly, the second side wall (32) is locally provided with a second concave groove (321), and the first concave groove (311) and the second concave groove (321) jointly form an air inlet channel (323) communicated with the air inlet hole (36).

7. The burner fire cover according to any one of claims 4 to 6, characterized in that: the second fire cover (2) comprises a first inner annular wall (21) directly connected with the second side wall (32), a second inner annular wall (22) opposite to the first inner annular wall (21), and an annular top wall (23) connected with the first inner annular wall (21) and the first inner annular wall (21), the second inner annular wall (22) and the annular top wall (23) jointly enclose a second mixed gas cavity (24), and at least two fire outlets (231) communicated with the second mixed gas cavity (24) are formed in the annular top wall (23).

8. The burner fire cover of claim 7, wherein: the part of the first inner annular wall (21) corresponding to the fire transfer chamber (3) is provided with an air inlet hole (211) communicated with the second air mixing cavity (24).

9. A burner using the burner fire cover of any one of claims 3 to 8, characterized in that: comprises the following steps:

the base (4) is provided with a first gas channel (41) communicated with the fire cover body (1) and a second gas channel (42) communicated with the second fire cover (2);

the connecting body (5) is arranged on the base (4) and comprises an annular body with a central hole (51) in the center, the upper surface of the annular body is provided with a first convex ring (52), a second convex ring (53), a third convex ring (54) and a fourth convex ring (55) which are sequentially arranged from the periphery of the central hole (51) outwards in the radial direction and from inside to outside at intervals, the fire cover body (1) is correspondingly placed on the first convex ring (52) and the second convex ring (53), and a first gas mixing cavity (14) of the fire cover body (1) is communicated with the first gas channel (41); and the second fire cover (2) is correspondingly arranged on the third convex ring (54) and the fourth convex ring (55), and the second gas mixing cavity (24) of the second fire cover (2) is communicated with the second gas channel (42).

10. The burner of claim 9, wherein: the annular body of the connecting body (5) is provided with first openings (56) which are communicated with the first gas mixing cavity (14) and the first gas channel (41) at intervals along the circumferential direction between the first convex ring (52) and the second convex ring (53), and is provided with second openings (57) which are communicated with the second gas mixing cavity (24) and the second gas channel (42) at intervals along the circumferential direction between the third convex ring (54) and the fourth convex ring (55).

11. The burner of claim 10, wherein: the outer peripheral wall (12) of the fire cover body (1) is placed on the second convex ring (53), the first inner annular wall (21) of the second fire cover (2) is placed on the third convex ring (54), an air replenishing cavity (6) is formed between the fire cover body (1) and the second fire cover (2), and the fire transfer chamber (3) is communicated with the air replenishing cavity (6) through the air inlet hole (36).

12. The burner of claim 11, wherein: the connector (5) still is equipped with a plurality of radial being used for connecting along circumference interval the tonifying qi chamber (6) and external secondary tonifying qi passageway (58), the connector (5) have and separate separator (7) of secondary tonifying qi passageway (58), separator (7) can with two relatively independent spaces are separated into in secondary tonifying qi passageway (58), communicate fire lid body (1) and second fire lid (2) respectively.

13. The burner of claim 12, wherein: the separator (7) comprises a partition board which is a horizontal partition board.

14. The burner of claim 13, wherein: the outer side end (71) of the partition plate extends into the secondary air supplementing channel (58) and is gradually inclined downwards from inside to outside.

15. The burner of claim 14, wherein: the inner end (72) of the partition is connected with an extension wall (531) extending downward from the second bead (53).

16. The burner according to any one of claims 10 to 15, wherein: the second wall surface (112b) of the annular inner step (112) of the fire cover body (1) is abutted against the periphery of the central hole (51), the first wall surface (112a) of the annular inner step (112) of the fire cover body (1) is abutted against the first convex ring (52), so that a flame stabilizing cavity (8) of the main fire hole (111) of the fire cover body (1) is enclosed, and the flame stabilizing cavity (8) is communicated with the first supplement groove (1121) and the second supplement groove (1122).

17. The burner of claim 16, wherein: an air outlet (10) is formed in the top of the fire cover body (1), a central cavity (110) is enclosed by the annular peripheral wall (11), and the center of the base (4) and the central cavity (110) jointly form an air supplement channel (40) which is communicated with the air outlet (10) and is communicated up and down.

18. The burner of claim 17, wherein: an adjusting piece (80) is arranged in the air replenishing channel (40).

19. The burner of claim 18, wherein: the adjusting piece (80) comprises a screwed part (801) screwed with the pipe wall of the air supplementing channel (40) and a flow guiding part (802) used for guiding overflowing liquid to the secondary air supplementing channel (58), and the flow guiding part (802) is gradually inclined downwards towards the secondary air supplementing channel (58) from the center to the periphery.

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