CN210861092U

CN210861092U - Sheet metal combustor

Info

Publication number: CN210861092U
Application number: CN201921146058.1U
Authority: CN
Inventors: 苏慧玲; 徐德明
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-06-26
Anticipated expiration: 2029-07-19

Abstract

The utility model relates to a sheet metal burner, which comprises an inner ring combustion assembly; the outer ring combustion assembly is annular and is arranged on the periphery of the inner ring combustion assembly, and a secondary air channel is arranged between the inner ring wall of the outer ring combustion assembly and the outer ring wall of the inner ring combustion assembly. The inner ring combustion assembly comprises an inner ring base, an inner ring fire cover covering the upper part of the inner ring base, and an inner fire outlet component which is clamped between the outer ring wall of the inner ring base and the outer ring wall of the inner ring fire cover and can adjust the thickness, an inner ring gas mixing chamber is formed among the inner ring base, the inner fire outlet component and the inner ring fire cover, and an inner ring fire hole which is communicated with the inner ring gas mixing chamber is formed in the inner fire outlet component. An annular adjusting sheet capable of adjusting the air inlet gap of the secondary air channel is arranged between the inner ring combustion assembly and the outer ring combustion assembly in a lifting mode. The sheet metal burner is convenient and uniform to produce, and has good adaptability.

Description

Sheet metal combustor

Technical Field

The utility model relates to a cooking utensils technical field, concretely relates to panel beating combustor.

Background

The burner is a core component of the hob, which directly affects the operational performance of the hob. The utility model discloses a chinese utility model patent "a high-efficient combustor" that the publication number of authorizing is CN207094617U (application number is 201720745224.4) and chinese utility model patent "a high-efficient combustor" that publication number is CN206958908U (application number is 201720744712.3), wherein the fire lid that sets up in the combustor of disclosing all adopts at least two-layer annular metal sheet to fold from top to bottom and establishes and form, and leave the gap between the adjacent metal sheet and form the air outlet channel who mixes the gas chamber intercommunication with above-mentioned outer loop, this air outlet channel inner port constitutes the air inlet, the outer port constitutes out the burner. The metal plate is manufactured by a sheet metal process, and compared with the traditional casting process, the method can more effectively ensure the product quality and improve the yield. When the burner adopting the structure is used, the fire outlet part has the advantages of fast fire transmission, bright flame color, less flame separation and no backfire, in addition, the air outlet channel is not easy to block, meanwhile, the fire outlet part can instantly gasify the overflowed liquid at high temperature, the heat loss is small, and the heat efficiency is high.

Also have and all set up inner ring fire lid and outer loop fire lid to this multilayer metal sheet and fold the cooking utensils that establish the structure, but when the preparation product, because different areas also are different because the requirement of eating habits to flame size, consequently in order to adapt to the flame needs in different areas, the quantity of metal sheet need be increased and decreased, when the metal sheet number of piles of inner ring fire lid changes, need adjust the secondary air volume that the clearance between inner ring fire lid and the outer loop fire lid needs in order to match the burning of inner ring fire lid very much. However, secondary air supplement gaps between the inner ring fire cover and the outer ring fire cover are required to be designed respectively and independently aiming at the burners with the inner ring fire covers of the metal plates with different layers, the universality of the product is poor, and the production process is relatively complex.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a convenient unified production is provided to above-mentioned prior art to can conveniently adjust the panel beating combustor in air inlet gap of the secondary air passageway of inner ring fire lid.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a sheet metal burner comprises

An inner ring combustion assembly;

the outer ring combustion assembly is annular and is arranged on the periphery of the inner ring combustion assembly, and a secondary air channel is formed between the inner ring wall of the outer ring combustion assembly and the outer ring wall of the inner ring combustion assembly;

the method is characterized in that: the inner ring combustion assembly comprises an inner ring base, an inner ring fire cover covering the upper part of the inner ring base, and an inner fire outlet component which is clamped between the outer ring wall of the inner ring base and the outer ring wall of the inner ring fire cover and can adjust the thickness, an inner ring gas mixing chamber is formed among the inner ring base, the inner fire outlet component and the inner ring fire cover, and an inner ring fire hole which is communicated with the inner ring gas mixing chamber is formed in the inner fire outlet component;

an annular adjusting sheet capable of adjusting the air inlet gap of the secondary air channel is arranged between the inner ring combustion assembly and the outer ring combustion assembly in a lifting mode.

In order to realize the automatic adjustment of the adjusting sheet, the device also comprises

The adjusting sheet is annular and arranged between the inner ring combustion assembly and the outer ring combustion assembly, and the adjusting sheet can adjust the air inlet gap of the secondary air channel through lifting;

the linkage piece is connected to the inner ring fire cover;

the electric telescopic piece is connected to the bottom of the adjusting sheet and can drive the adjusting sheet to move up and down;

the control circuit board is provided with a sensor capable of acquiring the movement information of the linkage, the control circuit board is also electrically connected with the electric telescopic piece, and the control circuit board can detect the position information of the linkage through the sensor to control the electric telescopic piece to lift.

The structure is ingenious, the influence of combustion can be avoided, and the hollow pipe body extends upwards from the bottom of the inner ring base;

the linkage piece is a rod body, the position of the linkage piece corresponding to the pipe body is connected to the top wall of the inner ring fire cover, and the linkage piece penetrates out of the pipe body downwards.

Simply, the linkage is a metal piece and the sensor is a hall sensor.

In order to ensure the connection tightness of the pipe body and the linkage part and avoid the gas leakage in the inner gas mixing cavity, the inner wall of the pipe body and the outer wall of the linkage part are provided with matched threads.

In order to more conveniently adjust the air inlet gap of the secondary air channel, the bottom of the inner ring combustion assembly is lower than that of the outer ring combustion assembly, the outer edge of the adjusting sheet is positioned below the inner edge of the outer ring combustion assembly, a gap is formed between the upper surface of the adjusting sheet and the lower surface of the outer ring combustion assembly, and the inner edge of the adjusting sheet is positioned outside the outer peripheral wall of the inner ring combustion assembly and has a gap with the outer peripheral wall of the inner ring combustion assembly.

In order to serve as the function of depositing the cistern simultaneously, avoid the influence of overflow to the combustor, improve the convenience of combustor clearance, the regulating blade is along the recessed recess that is provided with of circumference.

Preferably, the outer ring combustion assembly comprises an annular outer ring base, an outer ring fire cover and an outer fire outlet member, the outer ring fire cover covers the outer ring base, the outer fire outlet member is clamped between an outer ring wall of the outer ring fire cover and an outer ring wall of the outer ring base, an outer ring gas mixing chamber is formed among the outer ring base, the outer fire outlet member and the outer ring fire cover, the outer fire outlet member comprises at least two layers of annular metal plates, an outer fire outlet gap communicated with the outer ring gas mixing chamber is formed between two adjacent layers of metal plates, and the outer fire outlet gap forms an outer ring fire hole.

The boiler support comprises an annular lower liquid containing disc, an annular upper liquid containing disc and at least three support legs, wherein the annular upper liquid containing disc is arranged above the lower liquid containing disc, the three support legs are circumferentially distributed and are respectively connected with the lower liquid containing disc and the upper liquid containing disc, and gaps are formed between the lower liquid containing disc and the upper liquid containing disc to form a secondary air supply channel;

the lower liquid containing disc extends inwards and downwards in the radial direction to be abutted with the outer ring wall of the outer ring combustion assembly, and the upper liquid containing disc extends inwards and downwards in the radial direction from the upper part of the outer ring combustion assembly to the inner side of the outer fire outlet component.

Preferably, the upper liquid containing disc is provided with a liquid containing groove which is recessed in the peripheral area of the outer ring combustion assembly.

The inner fire outlet component comprises at least two layers of annular metal plates, an inner fire outlet gap communicated with the inner ring gas mixing chamber is arranged between the two adjacent layers of metal plates, and the inner fire outlet gap forms the inner ring fire hole.

The structure is simple, and every two adjacent metal plates in the internal fire outlet component comprise a metal plate with a wavy annular longitudinal section and a horizontally arranged metal plate.

Compared with the prior art, the utility model has the advantages of: the utility model provides a panel beating combustor, when carrying out production, the quantity of the sheetmetal of the component of putting out a fire in the constitution can specifically set up according to the burning demand in different areas, phase-match ground, the linkage can rise along with the increase of sheetmetal quantity, descend along with the reduction of sheetmetal quantity, the control circuit board is through the lift information of the linkage that receiving sensor acquireed, the lift of control adjustment piece, and then adjust the air inlet gap of secondary air passageway to with sheetmetal quantity assorted position, reach corresponding load with the inner ring burning subassembly of assurance panel beating combustor.

Drawings

Fig. 1 is the utility model discloses in the embodiment of the utility model provides an installation view of sheet metal burner.

Fig. 2 is a cross-sectional view of fig. 1.

Detailed Description

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

As shown in fig. 1 and 2, the sheet metal burner in this embodiment includes an inner ring combustion assembly 1, an outer ring combustion assembly 2, a regulating sheet 3, a linkage member 4, an electric telescopic member 5, a control circuit board 6, and a pan support 7. Wherein the pot support 7 is supported on a panel 9 of the cooker and is matched with the inner ring combustion component 1 and the outer ring combustion component 2 for use.

The inner ring combustion assembly 1 comprises an inner ring base 11, an inner ring fire cover 12 covering the upper part of the inner ring base 11, and an inner fire outlet component 13 clamped between the outer ring wall of the inner ring base 11 and the outer ring wall of the inner ring fire cover 12. Specifically, the inner ring base 11 is communicated with the corresponding inner ring injection pipe, a circle of outer ring wall extends upwards from the inner ring base 11, the inner ring fire cover 12 has a diameter matched with the radius of the outer ring wall forming the inner ring base 11, a circle of outer ring wall abutting against the inner ring base 11 extends downwards from the edge of the inner ring fire cover 12, and the plane where the outer ring wall of the inner ring base 11 and the outer ring wall of the inner ring fire cover 12 are located forms the outer ring wall of the inner ring combustion assembly 1 in this embodiment. An inner ring air mixing chamber 14 is formed among the inner ring base 11, the inner fire outlet member 13 and the inner ring fire cover 12.

The inner fire outlet component 13 comprises at least two layers of annular metal plates, an inner fire outlet gap communicated with the inner ring gas mixing chamber 14 is arranged between the two adjacent layers of metal plates, and the inner fire outlet gap forms an inner ring fire hole 15. The inner edge of the inner flame outlet member 13 is located in the inner ring plenum 14, and the outer edge of the inner flame outlet member 13 is located radially outward of the outer ring wall of the inner ring combustion assembly 1.

In this embodiment, each two adjacent metal plates in the internal fire outlet member 13 include a metal plate with a wavy annular longitudinal section and a horizontally arranged metal plate. The wavy metal plate and the horizontal metal plate are vertically superposed to form the inner fire outlet gap, and the inner fire outlet gap forms the inner ring fire hole 15. Therefore, the cross-sectional area and the depth of the inner fire outlet gap can be determined by setting the radial width of the metal plate and the height amplitude of the waves, and further the determination of the air outlet speed and the combustion intensity of each inner fire outlet gap is realized. The inner ring fire holes 15 formed by the structure have the advantages of more layers, more quantity and large area, so that the inner ring load is large. When a product is manufactured, the inner ring load can be adjusted by increasing or decreasing the number of layers of the two metal plates which can form the inner ring fire hole 15, and the more the number of layers of the inner ring fire hole 15 formed by the metal plates is, the larger the load is. Since the position of the inner ring base 11 is unchanged, the position of the inner ring fire cover 12 is lowered as the metal plate is reduced, that is, the thickness of the inner fire discharging member 13 is reduced.

The outer ring combustion assembly 2 comprises an annular outer ring base 21, an outer ring fire cover 22 and an outer fire outlet member 23, wherein the outer ring fire cover 22 covers the outer ring base 21, the outer fire outlet member 23 is clamped between the outer ring wall of the outer ring fire cover 22 and the outer ring wall of the outer ring base 21, and an outer ring gas mixing chamber 24 is formed among the outer ring base 21, the outer fire outlet member 23 and the outer ring fire cover 22. Specifically, the outer ring base 21 in this embodiment is communicated with a corresponding outer ring injection pipe, a circumferential inner ring wall extends upward from an inner edge of the outer ring base 21, an inner ring wall in the same plane as the inner ring wall of the outer ring base 21 extends downward from an inner edge of the outer ring fire cover 22, and a gap capable of mounting the outer fire discharging member 23 is formed between the inner ring wall of the outer ring base 21 and the inner ring wall of the outer ring fire cover 22. The fire outlet member 23 is tightly sandwiched between the inner annular wall of the outer ring base 21 and the inner annular wall of the outer ring fire cover 22. The outer edge of the outer ring fire cover 22 extends downward to form an outer ring wall which can be abutted against the outer edge of the outer ring base 21. Thus, the outer annular wall of the outer annular flame cover 22 forms the outer annular wall of the outer annular combustion assembly 2, and the plane where the inner annular wall of the outer annular base 21 and the inner annular wall of the outer annular flame cover 22 are located forms the inner annular wall of the outer annular combustion assembly 2. The inner edge of the outer fire outgoing member 23 is located inside the outer ring plenum 24, and the outer edge of the outer fire outgoing member 23 is located outside the outer ring wall of the outer ring combustion assembly 2.

The fire outlet component 23 comprises at least two layers of annular metal plates, and a fire outlet gap communicated with the outer ring gas mixing chamber 24 is formed between the two adjacent layers of metal plates, and forms an outer ring fire hole 25. The structure of the fire outlet member 23 in the present embodiment is the same as that of the fire outlet member 13, that is, each two adjacent metal plates in the fire outlet member 23 include one metal plate with a wavy annular longitudinal section and one horizontally arranged metal plate.

The outer ring combustion assembly 2 is annular and is arranged on the periphery of the inner ring combustion assembly 1, and a secondary air channel is arranged between the inner ring wall of the outer ring combustion assembly 2 and the outer ring wall of the inner ring combustion assembly 1 and is mainly used for introducing external air at the lower part of the combustor and introducing secondary air for the inner ring combustion assembly 1.

The adjusting sheet 3 is annular, sets up between inner ring combustion assembly 1 and outer loop combustion assembly 2, and this adjusting sheet 3 can adjust secondary air channel's air intake gap through going up and down, and then confirms the secondary air supply volume size to inner ring combustion assembly 1. In the present embodiment, the bottom of the inner ring combustion assembly 1 is lower than the bottom of the outer ring combustion assembly 2, the outer edge of the vane 3 is located below the inner edge of the outer ring combustion assembly 2, and a gap is provided between the upper surface of the vane 3 and the lower surface of the outer ring combustion assembly 2, the inner edge of the vane 3 is located outside the outer peripheral wall of the inner ring combustion assembly 1 and has a gap with the outer peripheral wall of the inner ring combustion assembly 1, and the inner edge of the vane is located below the outer edge of the inner flame outlet member 13. The gap between the upper surface of the adjusting blade 3 and the lower surface of the outer ring combustion assembly 2 and the gap between the inner edge of the adjusting blade 3 and the outer peripheral wall of the inner ring combustion assembly 1 jointly form an intake gap of the secondary air passage. When the adjusting blade 3 moves up and down, the gap between the inner edge of the adjusting blade 3 and the outer peripheral wall of the inner ring burner assembly 1 is kept basically constant, but the gap between the upper surface of the adjusting blade 3 and the lower surface of the outer ring burner assembly 2 is changed correspondingly.

In addition, the adjusting sheet 3 in this embodiment is recessed with a groove 31 along the circumference, and due to the arrangement position of the inner and outer edges of the adjusting sheet 3, the adjusting sheet 3 can be used as a liquid storage tank to contain and receive overflowed liquid, so that the influence on the combustion of the burner is reduced, and the burner is convenient to clean.

The linkage piece 4 is connected to the inner ring fire cover 12 and can only move along with the inner ring fire cover 12, when the thickness of the inner fire outlet member 13 is increased due to the increase of the metal sheet, the linkage piece 4 can ascend with the inner ring pot cover, and when the thickness of the inner fire outlet member 13 is reduced due to the reduction of the metal sheet, the linkage piece 4 can descend with the inner ring pot cover. The linkage 4 in this embodiment is a rod connected to the center of the top wall of the inner ring fire cover 12 and extending downward. The inner ring base 11 has a hollow tube 111 extending upward from the bottom, and the linkage 4 passes through the tube 111 and extends downward to the outside of the lower portion of the tube 111. In order to ensure the sealing performance of the inner ring gas mixing chamber 14, the inner wall of the pipe body 111 and the outer wall of the linkage element 4 in this embodiment have matching threads, that is, the linkage element 4 is screwed into the pipe body 111, so as to avoid the situation that the gas in the inner ring gas mixing chamber 14 leaks out, after the linkage element 4 is screwed into the pipe body 111, the outer annular wall of the inner ring fire cover 12 is pressed against the upper surface of the inner fire outlet member 13.

The control circuit board 6 is arranged below the linkage member 4, the control circuit board 6 is provided with a sensor capable of acquiring the movement information of the linkage member 4, the sensor in the implementation adopts a hall sensor, the linkage member 4 adopts a metal member, and the sensor can conveniently acquire the lifting information of the linkage member 4.

The bottom at adjustment sheet 3 is connected to electronic extensible member 5, this electronic extensible member 5 can adopt the various electric telescopic handle products among the prior art, this electronic extensible member 5 is connected with control circuit board 6 electricity, during the use, control circuit board 6 can detect position information control electronic extensible member 5 of linkage 4 through the sensor and go up and down the action, and then drive adjustment sheet 3 carries out the clearance of admitting air of elevating movement in order to adjust secondary air passageway, make secondary air passageway's the clearance of admitting air and interior ring fire hole 15 number of piles phase-match of going out fire component 13 in, it is less that the interior ring fire hole 15 number of piles of fire component 13 goes out in general, then secondary air passageway's the clearance of admitting air is less. When the setting number of piles of metal sheet was less promptly, the inner ring fire lid 12 compressed tightly in the play fire component 13 then can the downstream, drive linkage 4 downstream, and after the sensor detected linkage 4 downstream's information this moment, then the electronic extensible member 5 of control circuit 6 control upwards extended, and drive adjustment sheet 3 upwards moves, is close to the bottom of outer burning subassembly more, has reduced secondary air channel's air inlet gap promptly. The adjustment process when the number of the arranged layers of the metal plates is increased is reverse to the aforementioned adjustment process.

The pan support 7 comprises an annular lower liquid containing disc 71, an annular upper liquid containing disc 72 arranged above the lower liquid containing disc 71 and at least three support legs 73 which are distributed along the circumferential direction and are respectively connected with the lower liquid containing disc 71 and the upper liquid containing disc 72, and a gap is formed between the lower liquid containing disc 71 and the upper liquid containing disc 72 to form a secondary air supply channel 8. In this embodiment, the outer edges of the lower liquid containing tray 71 and the upper liquid containing tray 72 are connected with the support legs 73, and the support legs 73 are placed on the panel 9 of the kitchen range. The lower drip pan 71 extends radially inwardly and downwardly to abut the outer annular wall of the outer annular combustion assembly 2, and the upper drip pan 72 extends radially inwardly and downwardly from above the outer annular combustion assembly 2 to the inside of the outer flame projecting member 23. Thus, air at the upper part of the panel 9 is conveyed to the vicinity of the outgoing fire hole 25 of the outgoing fire member 23 through the secondary air supply channel 8 between the lower liquid containing tray 71 and the upper liquid containing tray 72, secondary air is supplied to the outer ring combustion assembly 2, and the secondary air is preheated by the outer ring combustion assembly 2 in the conveying process of the secondary air, so that the combustion efficiency of the outer ring combustion assembly 2 is improved. In addition, the upper drip tray 72 has a drip trough 721 recessed in the outer peripheral region of the outer ring combustion assembly 2, the drip trough 721 being provided for collecting the overflow.

The utility model provides a panel beating combustor, when carrying out production, the quantity of the sheetmetal of component 13 that goes out fire in the constitution can specifically set up according to the burning demand in different areas, phase-match ground, linkage 4 can rise along with the increase of sheetmetal quantity, descend along with the reduction of sheetmetal quantity, control circuit board 6 is through the lift information of the linkage 4 that receiving sensor acquireed, control adjustment piece 3's lift, and then adjust the air inlet gap of secondary air passageway to with sheetmetal quantity assorted position, reach corresponding load with the inner ring burning subassembly 1 of guaranteeing the panel beating combustor. Therefore, the product is convenient to produce according to the unified specification, the production cost is reduced, the adaptability is strong, and the applicability of the product is wider.

Claims

1. A sheet metal burner comprises

An inner ring combustion assembly (1);

the outer ring combustion assembly (2) is annular and is arranged on the periphery of the inner ring combustion assembly (1), and a secondary air channel is formed between the inner ring wall of the outer ring combustion assembly (2) and the outer ring wall of the inner ring combustion assembly (1);

the method is characterized in that: the inner ring combustion assembly (1) comprises an inner ring base (11), an inner ring fire cover (12) covering the upper part of the inner ring base (11), and an inner fire outlet component (13) which is clamped between the outer ring wall of the inner ring base (11) and the outer ring wall of the inner ring fire cover (12) and can adjust the thickness, an inner ring gas mixing chamber (14) is formed among the inner ring base (11), the inner fire outlet component (13) and the inner ring fire cover (12), and an inner ring fire hole (15) which is connected with the inner ring gas mixing chamber (14) is formed in the inner fire outlet component (13);

an annular adjusting sheet (3) capable of adjusting the air inlet gap of the secondary air channel is arranged between the inner ring combustion assembly (1) and the outer ring combustion assembly (2) in a lifting manner.

2. The sheet metal burner of claim 1, wherein: also comprises

The linkage piece (4) is connected to the inner ring fire cover (12);

the electric telescopic piece (5) is connected to the bottom of the adjusting sheet (3) and can drive the adjusting sheet (3) to move up and down;

the control circuit board (6) is provided with a sensor capable of acquiring the movement information of the linkage piece (4), the control circuit board (6) is further electrically connected with the electric telescopic piece (5), and the control circuit board (6) can detect the position information of the linkage piece (4) through the sensor to control the electric telescopic piece (5) to perform lifting action.

3. The sheet metal burner of claim 2, wherein: the inner ring base (11) extends upwards from the bottom to form a hollow pipe body (111);

the linkage piece (4) is a rod body, the linkage piece (4) is connected to the top wall of the inner ring fire cover (12) corresponding to the position of the pipe body (111), and the linkage piece (4) penetrates out of the pipe body (111) downwards.

4. The sheet metal burner of claim 3, wherein: the linkage piece (4) is a metal piece, and the sensor is a Hall sensor.

5. The sheet metal burner of claim 3, wherein: the inner wall of the pipe body (111) and the outer wall of the linkage part (4) are provided with matched threads.

6. The sheet metal burner of any one of claims 1 to 5, wherein: the bottom of the inner ring combustion assembly (1) is lower than that of the outer ring combustion assembly (2), the outer edge of the adjusting sheet (3) is located below the inner edge of the outer ring combustion assembly (2), a gap is formed between the upper surface of the adjusting sheet (3) and the lower surface of the outer ring combustion assembly (2), and the inner edge of the adjusting sheet (3) is located on the outer side of the outer peripheral wall of the inner ring combustion assembly (1) and has a gap with the outer peripheral wall of the inner ring combustion assembly (1).

7. The sheet metal burner of claim 6, wherein: the adjusting sheet (3) is provided with a groove (31) along the circumferential direction in a concave mode.

8. The sheet metal burner of any one of claims 1 to 5, wherein: the outer ring combustion assembly (2) comprises an annular outer ring base (21), an outer ring fire cover (22) and an outer fire outlet component (23), the outer ring fire cover (22) covers the outer ring base (21), the outer fire outlet component (23) is clamped between the outer ring wall of the outer ring fire cover (22) and the outer ring wall of the outer ring base (21), an outer ring gas mixing chamber (24) is formed among the outer ring base (21), the outer fire outlet component (23) and the outer ring fire cover (22), the outer fire outlet component (23) comprises at least two layers of annular metal plates, an outer fire outlet gap communicated with the outer ring gas mixing chamber (24) is formed between every two adjacent layers of metal plates, and the outer fire outlet gap forms an outer ring fire hole (25).

9. The sheet metal burner of claim 8, wherein: the pot support (7) is supported and arranged on the cooker panel (9), the pot support (7) comprises an annular lower liquid containing disc (71), an annular upper liquid containing disc (72) arranged above the lower liquid containing disc (71) and at least three support legs (73) which are distributed along the circumferential direction and are respectively connected with the lower liquid containing disc (71) and the upper liquid containing disc (72), and a gap is formed between the lower liquid containing disc (71) and the upper liquid containing disc (72) to form a secondary air supply channel (8);

the lower liquid containing disc (71) extends radially inwards and downwards to be abutted with the outer ring wall of the outer ring combustion assembly (2), and the upper liquid containing disc (72) extends radially inwards and downwards to the inner side of the outer fire outlet member (23) from the upper part of the outer ring combustion assembly (2).

10. The sheet metal burner of claim 9, wherein: and a liquid containing groove (721) is formed in the outer peripheral area of the outer ring combustion assembly (2) of the upper liquid containing disc (72) in a concave mode.

11. The sheet metal burner of any one of claims 1 to 5, wherein: the inner fire outlet component (13) comprises at least two layers of annular metal plates, an inner fire outlet gap communicated with the inner ring gas mixing chamber (14) is formed between every two adjacent layers of metal plates, and the inner fire outlet gap forms the inner ring fire hole (15).

12. The sheet metal burner of claim 11, wherein: every two adjacent metal plates in the internal fire outlet component (13) comprise a metal plate with a wavy annular longitudinal section and a horizontally arranged metal plate.