CN110848689A

CN110848689A - Upper air inlet burner

Info

Publication number: CN110848689A
Application number: CN201810950687.3A
Authority: CN
Inventors: 柯情; 刘晓刚; 王帅东; 郑军妹; 俞瑜
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2018-08-20
Filing date: 2018-08-20
Publication date: 2020-02-28

Abstract

The invention relates to an upper air inlet burner, which comprises a base, a first ejector and a second ejector, wherein the first ejector and the second ejector are accommodated in the base and are separated from each other; set up interior disk body and outer disk body on the base, the central point of interior disk body puts and has vertical first drawing and penetrate the pipe, and outer disk body is provided with two at least independent second respectively and penetrates the passageway, and the second draws penetrates the axis that the passageway has the slope, its characterized in that: the top of the base is provided with a concave cavity which is partially sunken downwards, the bottom wall of the concave cavity is provided with the first ejector, and the first ejector pipe can extend into the concave cavity and is arranged opposite to the first ejector; compared with the prior art, the invention has the advantages that the conventional bottom cup positioned below the liquid containing disc is eliminated, the base is locally higher than the liquid containing disc, the base is provided with a concave cavity for the first injection pipe to extend into, and the first injection pipe can be made longer under the condition of not changing the height of the integral burner.

Description

Upper air inlet burner

Technical Field

The invention relates to a burner of a gas cooker, in particular to an upper air inlet type cooker burner with double channels.

Background

At present, the upper air inlet gas stoves in the market are platform type gas stoves and embedded type gas stoves, wherein the burner of the embedded type gas stove is of a single-channel upper air inlet structure, gas enters through a channel, the firepower of the gas is controlled by a valve, and the gas of an inner fire ring cannot be used independently. In order to solve the problems that a single channel does not have independent central fire and the heat load is small, a Chinese patent with the application number of CN98120026.5 (with the publication number of CN1212348A) discloses a gas burner which has simple structure and can independently adjust the central fire and the outer ring fire, that is, such burners are generally provided with a central injector and an outer ring injector, but such gas burners have been found in experiments to have unsatisfactory combustion performance, uneven velocity of primary air supplied to the central flame front and the outer flame front, because the air suction of the central ejector and the outer ring ejector is uneven, the flame length of the central fire and the flame length of the outer ring fire are different due to the incomplete mixing of the gas and the primary air, meanwhile, the ejector pipe is limited by the height of the upper air inlet burner and cannot be too long, so that the channel resistance is large, yellow flame is easy to appear when the power is high, and particularly, the yellow flame is more obvious when the power is low. In order to solve the problem that the ejector tube of the upper air inlet burner cannot be made too long, a chinese patent No. ZL200680014368.7 (CN 101166934B) of high power dual burner for gas range with multi-ring concentric flame crown provides a burner with a minimum of four mixing venturi chambers, a central chamber with vertical axis above the first nozzle and a minimum of three uniformly spaced chambers with inclined axis, which are respectively supplied by different nozzles, and in the case of the burner with four venturi chambers, although the three chambers with inclined axis can obtain larger combustion heat without changing the height of the whole burner, the relative distance between the first nozzle located in the central chamber and the mixing chamber of the central venturi chamber cannot be solved, but the dual burner includes a circular basin-shaped main body located below the panel, namely, the term "bottom cup", it is under the condition of the height that does not change whole combustor, the height of central venturi tube mixing chamber still can not be done long, its length is still shorter, thereby make the inner ring combustibility that central venturi tube mixing chamber corresponds still not ideal, and finally, the outer ring fire lid of this gas burner corresponds has the cavity of inclined axis, still there is the gas pressure that can make outer ring fire lid flow along the fire hole that circumference set up uneven, thereby the flame that leads to the outer lane fire that outer ring fire lid produced is inhomogeneous, in order to avoid producing the inhomogeneous problem of flame, need do further improvement to current last wind combustor.

Disclosure of Invention

The invention aims to solve the technical problem of providing an upper air inlet burner which can effectively lengthen the length of an injection pipe corresponding to a central mixing cavity under the condition of not changing the height of the integral burner.

The invention aims to solve another technical problem of providing a cooker burner which is not easy to generate yellow flame and weak firepower aiming at the prior art.

The invention aims to solve the technical problem of providing a cooker burner which is not easy to cause explosion due to the backflow of fuel gas caused by the blockage of an injector in view of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: this go up air inlet burner includes: the base accommodates a first ejector and at least two second ejectors which are independent from each other and are positioned at the periphery of the first ejector;

the connector is arranged on the base and comprises an inner disc body and an outer disc body which are concentrically arranged at intervals, a vertical first injection pipe is arranged at the center of the inner disc body, at least two independent second injection channels are circumferentially arranged at intervals on the outer disc body, and the second injection channels are provided with axes which are inclined relative to the horizontal plane; and

the fire cover comprises an inner ring fire cover and an outer ring fire cover which are respectively and correspondingly arranged on the inner disc body and the outer disc body, a first gas mixing chamber positioned in the center is formed between the inner ring fire cover and the inner disc body, and a second gas mixing chamber positioned on the periphery is formed between the outer ring fire cover and the outer disc body; the first gas mixing chamber corresponds to the first injection pipe, and the second gas mixing chamber corresponds to the second injection passage;

the first gas mixing chamber corresponds to the first injection pipe, and the second gas mixing chamber corresponds to the second injection passage;

the method is characterized in that: the base is provided with a hollow columnar part, the top wall of the hollow column is downwards sunken to form a concave cavity, and the base is also provided with an outer peripheral wall at the periphery of the peripheral wall of the concave cavity; the first ejector is arranged on the bottom wall of the concave cavity, and the first injection pipe extends into the concave cavity and is arranged opposite to the first ejector; (ii) a The second ejector is arranged on the peripheral wall of the base, and each second ejector is opposite to the corresponding second injection channel.

In order to ensure that the distance between the second ejector and the air inlet of the second injection channel is relatively close, the injection capacity is improved; the second injectors are all higher than the first injectors.

In order to avoid the defect that the length of an ejector pipe corresponding to a central mixing cavity of an upper air inlet burner in the prior art cannot be increased, the invention provides the following improvement scheme that the base is provided with at least one independent peripheral cavity at the periphery of the peripheral wall of the concave cavity, an outlet at the upper end of the concave cavity is communicated with the first ejector pipe, the upper end of the peripheral cavity is closed to be a blind end, the lower parts of the peripheral cavities are communicated with each other, and the second ejector is arranged on the peripheral wall of the upper part of the peripheral cavity.

The peripheral chamber may be a peripheral chamber that is through to each other, or may be a plurality of peripheral chambers that are relatively independently disposed and through to each other at the bottom, and by means of the closed end surface, the phase-fluid separation of the first ejector and the second ejector is effectively realized, so as to allow a user to individually control the inflow of the fuel mixture into the first injection pipe and the second injection passage.

When the periphery cavity is a periphery cavity which is mutually communicated, the lower end of the periphery cavity is opened to be an open end, the base further comprises a base, a convex ring is upwards convexly arranged in the center of the base, and the lower end of the periphery cavity is abutted against the convex ring.

In order to realize the holistic stability of combustor and the convenience of installation, the bottom of base is still including being located protruding outer annular protruding wall of circle, be connected through the splice bar between protruding circle and the annular protruding wall, the lower side of annular protruding wall is equipped with the lug downwards, the lug is equipped with the mounting hole.

The design scheme of the invention is characterized in that the conventional bottom cup positioned below the liquid containing disc is omitted, and the base is locally higher than the liquid containing disc, so that on one hand, the distance between the second ejector and the air inlet of the second injection channel is relatively close, and the injection capacity is improved; on the other hand, the base is provided with a space for the first injection pipe to extend into, so that the first injection pipe can be longer, the liquid storage device further comprises a liquid containing disc, and a boss extends from the peripheral wall of the peripheral chamber to the periphery below the second injector and can support the liquid containing disc.

In order to enable the distance between the second ejector and the air inlet of the second injection channel to be relatively short and improve the injection capacity, the second injection channel is a radial venturi tube and is arranged on the inner peripheral edge of the outer disc body, and the air inlet of the second injection channel inwards extends to the air supplementing cavity enclosed between the inner disc body and the outer disc body towards the inner disc body. The second injection passage can be completely limited in the tubular structure which is arranged on the inner circumferential edge of the outer disc body and is convergent-divergent, or the tubular structure can be partially formed in the fire cover and partially formed in the outer disc body.

In order to facilitate covering of the outer disc body with the outer ring fire cover, the outer periphery of the outer disc body extends in the horizontal direction along the air outlet of the second ejector, an outer ring wall face is arranged at the outer end of the outer periphery of the outer disc body in an upward protruding mode, an inner ring wall face is arranged at the pipe wall of the second ejection channel in an upward protruding mode, the outer ring fire cover covers the inner ring wall face and the outer ring wall face, and the inner ring wall face, the outer periphery of the outer disc body and the outer ring fire cover jointly enclose the second gas mixing chamber.

Furthermore, the outer ring fire cover comprises an annular top wall, an inner ring wall and an outer ring wall, wherein the inner ring wall and the outer ring wall extend downwards from the inner edge and the outer edge of the annular top wall in an inclined mode, the inner ring wall is abutted against the inner ring wall, the outer ring wall is abutted against the outer ring wall, and the inner ring wall is provided with outer fire holes at intervals in the circumferential direction.

In order to facilitate the inner tray to rest on the base, the top of the base has an outwardly extending upper rim, and the inner tray also has at least two downwardly projecting ribs and thereby rests on the upper rim of the top of the cartridge.

In order to meet the requirement that the gas fire power of the combustor is regulated and controlled by a valve, an inner ring fire and an outer ring fire can be used simultaneously, an inner ring fire can be used independently, particularly, the flames in the inner flame in the circumferential direction of the center and the outer flame basically have no turbulence and interference, and the inner ring fire cover has a small fire cooking function.

In order to solve the third technical problem that the second ejector is easy to block due to the fact that the second ejector is located on the liquid containing disc, the outer edge of the inner disc body extends outwards to form an outer edge, the outer edge abuts against the inner ring wall surface of the pipe wall of the second injection channel, and the outer edge forms a waterproof brim above the second ejector.

In order to effectively supply primary air to the first injector in the concave cavity, the interval between the outer edges forms a first air inlet connecting the air supply cavity with the outside, the interval between the convex strips forms a second air inlet connecting the air supply cavity with the concave cavity, and the first air inlet is in fluid communication with the second air inlet. The fuel mixture of the first gas mixing chamber is directly supplied by the first ejector and the first injection pipe, and the mixture of the second gas mixing chamber is directly supplied by the second ejector and the second injection passage and is separated from the first gas mixing chamber and the second gas mixing chamber in a fluid mode, so that the fuel mixture can be supplied independently.

In order to prevent the mutual influence of the primary air introduced from the outside between the respective second ejectors, the outer periphery of the outer peripheral wall is further provided with a partition member for isolating the respective second ejectors from each other.

Compared with the prior art, the invention has the advantages that the conventional bottom cup positioned below the liquid containing disc is eliminated, and the base is provided with the hollow columnar part, so that on one hand, the second ejector is relatively close to the gas inlet of the second injection channel, and the injection capacity is improved; on the other hand, the base is provided with a concave cavity for the first injection pipe to extend into, so that the first injection pipe can be longer without changing the height of the whole combustor, the flame of the upper air inlet combustor is short, uniform and powerful, and the defects of yellow flame, tempering and the like can be avoided.

Drawings

FIG. 1 is a schematic structural view of an upper air intake burner according to embodiment 1 of the present invention;

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

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

FIG. 4 is a schematic structural view of the bottom of the base in embodiment 1 of the present invention;

FIG. 5 is a schematic structural view of the bottom surface of a connecting body in example 1 of the present invention;

FIG. 6 is a schematic structural view of the front surface of a connecting body in example 1 of the present invention;

FIG. 7 is a schematic structural view of an upper air intake burner according to embodiment 2 of the present invention;

FIG. 8 is an exploded view of FIG. 7;

FIG. 9 is a cross-sectional view of FIG. 7;

FIG. 10 is a sectional view of the bottom of a susceptor in embodiment 2 of the present invention;

fig. 11 is a schematic structural view of a base in embodiment 3 of the present invention.

Detailed Description

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

Example 1

As shown in fig. 1 to 6, the top intake burner of the present invention, which is suitable for both conventional top intake burners and also for sambav burners in europe, comprises a base 1, a first injector 11 and at least two second injectors 12, wherein the first injectors 11 are accommodated in the base 1 and are separated from each other; the number of this embodiment is 4, for example in a burner with two venturi lumens, each individual venturi lumen must be loaded with 2kW in order to obtain 4 kW; in the case of a burner with four venturi lumens, reducing the load of each venturi lumen to 1.25kW, minus 62.5%, a maximum power of 5kW is obtained; the connecting body 2 is arranged on the base 1, the connecting body 2 comprises an inner disc body 21 and an outer disc body 22 which are concentrically arranged at intervals, a vertical first injection pipe 211 is arranged at the center of the inner disc body 21, four independent second injection channels 221 are circumferentially arranged at intervals on the outer disc body 22, and the second injection channels 221 have axes which are inclined relative to the horizontal plane; the fire cover comprises an inner ring fire cover 3 and an outer ring fire cover 4 which are respectively and correspondingly arranged on the inner disc body 21 and the outer disc body 22, and a first air mixing chamber 31 positioned in the center is formed between the fire cover and the inner disc body 21 and a second air mixing chamber 40 positioned on the periphery is formed between the fire cover and the outer disc body 22; the first gas mixing chamber 31 corresponds to the first injection pipe 211, and the second gas mixing chamber 40 corresponds to the second injection passage 221; the base 1 is provided with a hollow cylindrical part, the top wall of the hollow cylindrical part is downwards sunken to form a concave cavity 13, the bottom wall of the concave cavity 13 is provided with a first ejector 11, and a first ejector pipe 211 can extend into the concave cavity 13 and is arranged opposite to the first ejector 11; the base 1 also has a peripheral wall 101 on the periphery of the peripheral wall of the cavity 13; the second ejectors 12 are arranged on the outer peripheral wall of the base 1, each second ejector 12 is arranged opposite to the corresponding second injection channel 221, the second ejectors 12 are arranged higher than the first ejectors 11, and a boss 141 capable of supporting the liquid containing disc 6 extends from the periphery of the peripheral wall of the peripheral chamber 14 to the periphery of the lower part of the second ejector 12, so that the design scheme of the invention can omit a conventional bottom cup positioned below the liquid containing disc 6, but the base 1 is partially higher than the liquid containing disc 6, on one hand, the distance between the second ejectors 12 and the air inlets of the second injection channels 221 is relatively close, and the injection capacity is improved; on the other hand, the base 1 is provided with a space for the first ejector pipe 211 to extend into, so that the first ejector pipe 211 can be made longer, the base 1 comprises a cavity 13 positioned in the center and an independent peripheral chamber 14 surrounding the cavity 13, the second ejector 12 is arranged higher than the first ejector 11, a boss 141 extends from the peripheral wall of the peripheral chamber 14 to the periphery below the second ejector 12, and the boss 141 can support the liquid containing plate 6.

The upper outlet 131 of the cavity 13 of this embodiment is communicated with the first injection pipe 211, the upper end of the peripheral chamber 14 is closed to be a blind end, the lower end of the peripheral chamber 14 is opened to be an open end, the base 1 further comprises a base 5, a convex ring 51 is convexly arranged in the center of the base 5, the lower end of the peripheral chamber 14 can abut against the convex ring 51, the peripheral chamber 14 is independently opened and is connected with each second injector 12, so that the second gas supply duct for supplying gas to the second injectors 12 is sprayed into the peripheral chamber 14 to buffer the gas, and then the gas enters the corresponding second injectors 12 respectively. In order to achieve the overall stability and the convenience of installation of the burner, the bottom of the base 1 further includes an annular convex wall 52 located at the periphery of the convex ring 51, the convex ring 51 is connected with the annular convex wall 52 through a connecting rib 53, a convex block 521 is arranged below the annular convex wall 52 in a downward protruding mode, and a mounting hole 5211 is formed in the convex block 521. The second injection passage 221 arranged opposite to the second injector 12 is a radial venturi tube and is arranged on the inner circumferential edge 221 of the outer disc 22, and in order to improve the injection capability of the second injection passage 221, an air inlet of the second injection passage 221 extends inwards to the direction of the inner disc 21 to the air replenishing cavity 7 enclosed between the inner disc 21 and the outer disc 22, so that the second injection passage 221 is longer and closer to the second injector 12. The outer peripheral edge 222 of the outer disc 22 extends in the horizontal direction along the air outlet of the second injector 12, the outer end of the outer peripheral edge 222 of the outer disc 22 is provided with an outer ring wall 2221 in an upward protruding manner, the pipe wall of the second injection passage 221 is provided with an inner ring wall 2211 in an upward protruding manner, the inner ring wall 2211 and the outer ring wall 2221 are covered with an outer ring fire cover 4, the inner ring wall 2211, the outer ring wall 2221, the outer peripheral edge 222 of the outer disc 22 and the outer ring fire cover 4 jointly enclose a second air mixing chamber 40, the outer ring fire cover 4 comprises an annular top wall 41, an inner ring wall 42 and an outer ring wall 43, the inner ring wall 42 abuts against the inner ring wall 2211, the outer ring wall 43 abuts against the outer ring wall 2221, the inner ring wall 42 is circumferentially provided with outer fire holes 421 in a spaced manner, and the outer ring fire cover 4 can be more easily assembled on the outer disc 22.

In addition, in order to facilitate the resting of the inner tray 21 on the base 1, the top of the base 1 has an outwardly extending upper rim 15, and the inner tray 21 also has four downwardly projecting ribs 210 and thereby rests on the top upper rim 15 of the base 1. The inner ring fire cover 3 is internally provided with a groove which is concave from bottom to top and is used for the first injection pipe 211 to extend into, the groove and the inner disc body 21 are surrounded to form a first gas mixing chamber 31, and the outer peripheral wall of the inner ring fire cover 3 is provided with an inner fire hole 32. The outer edge of the inner disk body 21 extends outwards to form an outer edge 212, the outer edge 212 abuts against an inner ring wall surface 2211 of the pipe wall of the second injection passage 221, and the outer edge 212 forms a waterproof brim above the second injector 12. In order to prevent the second injector 12 from being easily clogged by the overflow of the second injector 12 on the liquid containing tray 6, the space between the outer edges 212 constitutes a first air inlet 71 connecting the air replenishing chamber 7 with the outside, the space between the ribs 210 constitutes a second air inlet 72 connecting the air replenishing chamber 7 with the cavity 13, and the first air inlet 71 is in fluid communication with the second air inlet 72.

Referring to fig. 3, as described above, the path of the primary air, the gas, and the mixed primary air and gas inside the burner (see the dotted arrow) is as follows, the primary air is sucked into the cavity 13 of the base 1 from the outside through the first and

second air inlets

71 and 72 by the kinetic energy of the gas itself due to the low pressure caused by the injection of the first injector 11, the first injection pipe 211, and the first gas mixing chamber 31, the premixed primary air and gas finally enters the first gas mixing chamber 31, and the mixed primary air and gas finally passes through the inner fire hole 32 of the inner ring fire cover 3 and is ignited together with the secondary air of the external environment to form the inner ring fire. The fire cover further comprises an outer fire which can enable a user to control independently, primary air and fuel gas required by the outer fire are input into the second air mixing chamber 40 through the second injection passage 221 independently from the first injection pipe 211, meanwhile, the second air mixing chamber 40 is separated from the first air mixing chamber 31, fluid separation of the second air mixing chamber 40 and the first air mixing chamber 31 is achieved in the mode, then the secondary air and the fuel gas can be supplied independently, the user is allowed to control inflow of fuel mixtures entering the first injection pipe 211 and the second injection passage 221 independently, and if the sizes of the outer fire and the central fire are to be adjusted, adjusting valves connected to a first air inlet pipe 9 communicated with the cavity 13 and a second air inlet pipe 10 communicated with the outer cavity 14 and arranged on the periphery of the base 1 are adjusted.

Example 2

As shown in fig. 7 to 10, the structure is basically the same as that of embodiment 1, and the only difference is that: the upper outlet 131 of the cavity 13 is communicated with the first injection pipe 211, the upper end of the peripheral chamber 14 is closed to be a blind end, 4 peripheral chambers 14 are provided in this embodiment, the lower ends of the peripheral chambers are communicated with each other through a channel 8 shaped like a cross, and the second injectors 12 connected with the corresponding peripheral chambers 14 are circumferentially arranged on the peripheral wall of the peripheral chamber 14 at intervals, wherein the primary air, the fuel gas and the path of the mixed primary air and fuel gas inside the burner (see the dotted arrow of fig. 9).

Example 3

As shown in fig. 11, the structure is basically the same as that of embodiment 1, and the only difference is that: in order to prevent the mutual influence of the primary air introduced from the outside between the respective second ejectors 12, the outer peripheral wall 101 is further provided at the periphery thereof with a partition member 100 for isolating the respective second ejectors 12 from each other.

Claims

1. An upper intake air burner comprising:

a base (1), wherein a first ejector (11) and at least two second ejectors (12) which are independent from each other are accommodated in the base (1), and the second ejectors are positioned at the periphery of the first ejector (11);

the connecting body (2) is arranged on the base (1) and comprises an inner disc body (21) and an outer disc body (22) which are concentrically arranged at intervals, a vertical first injection pipe (211) is arranged at the center of the inner disc body (21), at least two independent second injection channels (221) are circumferentially arranged on the outer disc body (22) at intervals, and the second injection channels (221) have axes inclined relative to the horizontal plane; and

the fire cover comprises an inner ring fire cover (3) and an outer ring fire cover (4) which are respectively and correspondingly arranged on the inner disc body (21) and the outer disc body (22), a first gas mixing chamber (31) positioned in the center is formed between the inner ring fire cover (3) and the inner disc body (21), and a second gas mixing chamber (40) positioned at the periphery is formed between the outer ring fire cover (4) and the outer disc body (22); the first air mixing chamber (31) corresponds to the first injection pipe (211), and the second air mixing chamber (40) corresponds to the second injection passage (221);

the method is characterized in that: the base (1) is provided with a hollow columnar part, the top wall of the hollow column is downwards sunken to form a cavity (13), and the base (1) is also provided with an outer peripheral wall (101) at the periphery of the peripheral wall of the cavity (13); the first ejector (11) is arranged on the bottom wall of the cavity (13), and the first injection pipe (211) extends into the cavity (13) and is arranged opposite to the first ejector (11); the second ejectors (12) are arranged on the peripheral wall (101) of the base (1), and each second ejector (12) is arranged opposite to the corresponding second injection passage (221).

2. The upper intake burner of claim 1, wherein: the second injectors (12) are all higher than the first injectors (11).

3. The upper intake burner of claim 1, wherein: the base (1) is provided with at least one independent peripheral chamber (14) at the periphery of the peripheral wall of the concave cavity (13), an upper end outlet (131) of the concave cavity (13) is communicated with the first injection pipe (211), the upper end of the peripheral chamber (14) is closed to be a blind end, the lower parts of the peripheral chambers (14) are communicated with each other, and the second ejector (12) is arranged on the peripheral wall of the upper part of the peripheral chamber (14).

4. The upper intake burner of claim 3, wherein: the lower extreme of periphery cavity (14) is opened to open and is the open end, base (1) still including base (5), the central authorities of base (5) are upwards protruding to be equipped with protruding circle (51), the lower extreme of periphery cavity (14) supports and leans on protruding circle (51).

5. The upper intake burner of claim 4, wherein: the bottom of the base (1) further comprises an annular convex wall (52) located on the periphery of the convex ring (51), the convex ring (51) is connected with the annular convex wall (52) through a connecting rib (53), a convex block (521) is arranged below the annular convex wall (52) in a downward protruding mode, and a mounting hole (5211) is formed in the convex block (521).

6. The upper intake burner of claim 3, 4 or 5, wherein: the liquid container is characterized by further comprising a liquid containing disc (6), wherein a boss (141) extends from the peripheral wall of the peripheral chamber (14) to the periphery of the lower portion of the second ejector (12), and the boss (141) can support the liquid containing disc (6).

7. The upper intake air burner as claimed in any one of claims 1 to 5, wherein: the second injection passage (221) is a radial venturi tube and is arranged on the inner circumferential edge (221) of the outer disc body (22), and an air inlet of the second injection passage (221) extends inwards to the inner disc body (21) to an air supplementing cavity (7) enclosed between the inner disc body (21) and the outer disc body (22).

8. The upper intake burner of claim 7, wherein: the periphery of outer disk body (22) is followed along (222) the gas outlet of second sprayer (12) extends on the horizontal direction to the outer end of the periphery of outer disk body (22) along (222) is upwards protruding to be equipped with outer lane wall (2221), the pipe wall that second draws passageway (221) is drawn and is equipped with inner circle wall (2211) to the epirelief, inner circle wall (2211) and outer lane wall (2221) top cover have outer ring fire lid (4), inner circle wall (2211), outer lane wall (2221), outer disk body (22) periphery are enclosed jointly along (222) and outer ring fire lid (4) and are established into second gas-mixing chamber (40).

9. The upper intake burner of claim 8, wherein: the outer ring fire cover (4) comprises an annular top wall (41), an inner ring wall (42) and an outer ring wall (43), wherein the inner ring wall (42) and the outer ring wall (43) extend downwards from the inner edge and the outer edge of the annular top wall (41) in an inclined mode, the inner ring wall (42) abuts against the inner ring wall surface (2211), the outer ring wall (43) abuts against the outer ring wall surface 2221, and outer fire holes (421) are formed in the inner ring wall (42) in a circumferentially spaced mode.

10. The upper intake burner of claim 8 or 9, wherein: the top of the base (1) has an outwardly extending upper rim (15) and the inner tray (21) also has at least two downwardly projecting ribs (210) and thereby rests on the top upper rim (15) of the base (1).

11. The upper intake burner of claim 10, wherein: the inner ring fire cover (3) is internally provided with a groove which is concave from bottom to top and is used for the first injection pipe (211) to extend into, the groove and the inner disc body (21) are surrounded to form the first gas mixing chamber (31), and the outer peripheral wall of the inner ring fire cover (3) is provided with an inner fire hole (32).

12. The upper intake burner of claim 11, wherein: the outer edge of the inner disc body (21) extends outwards to form an outer edge (212), the outer edge (212) is abutted to an inner ring wall surface (2211) of the pipe wall of the second injection passage (221), and the outer edge (212) forms a waterproof eaves above the second injector (12).

13. The upper intake burner of claim 12, wherein: the interval between the outer edges (212) forms a first air inlet (71) for connecting the air replenishing cavity (7) with the outside, the interval between the convex strips (210) forms a second air inlet (72) for connecting the air replenishing cavity (7) with the cavity (13), and the first air inlet (71) is in fluid communication with the second air inlet (72).

14. The upper intake burner of claim 1, wherein: the periphery of the peripheral wall (101) is also provided with a partition (100) which isolates the second ejectors (12) from each other.