CN110848678A - Upper air inlet burner - Google Patents

Abstract

The invention relates to an upper air inlet burner, which comprises a base, wherein a first ejector and a second ejector which are separated independently are accommodated in the base; the connector of setting on the base, the central point of disk body has vertical first to draw and penetrates the pipe in it, and outer disk body is provided with two at least independent second respectively and draws and penetrates pipe, its characterized in that: the liquid supply device has the advantages that two independent air supply channels are formed by the separation effect of the flow dividing pieces, the mutual entrainment effect of hot air flow after combustion and high temperature of the combustor on primary air supplied to the first injector and the second injector is effectively avoided, the air supply effect is effectively improved, and therefore the upper air inlet combustor is not prone to the defects of yellow flame, backfire and the like.

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 has no independent central fire and the thermal load is small, a Chinese patent with application number CN98120026.5 (publication number CN1212348A) discloses a gas burner which has simple structure and can independently adjust the central fire and the outer ring fire, namely the burner is generally provided with a central ejector and an outer ring ejector, but the gas burner is found in experiments that the combustion performance is not ideal enough, the speed of supplying primary air to a central flame head and an outer flame head is not uniform, the flame length of the central fire and the outer ring fire is also different due to the incomplete mixing of the gas and the primary air due to the uneven air suction of the central ejector and the outer ring ejector, and meanwhile, an ejector pipe is limited by the height of an 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 large, particularly when the small fire is in a gear, the yellow flame is more pronounced. In order to solve the problem that the ejector pipe of the upper air inlet burner cannot be too long, the invention patent of china with patent number ZL200680014368.7 (publication number CN101166934B) for high power dual burner of gas stove with multi-ring concentric flame crowns provides a burner with a minimum of four mixing venturi chambers, a central chamber with a vertical axis above the first nozzle and a minimum of three uniformly spaced chambers with inclined axes, which are respectively supplied by different nozzles, and in the case of the burner with four venturi chambers, although the three chambers with inclined axes can obtain a large combustion heat without changing the height of the whole burner, the relative distance between the first nozzle in the central chamber and the mixing chamber of the central venturi chamber cannot be solved, because the dual burner includes a circular basin-shaped main body 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 enough 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 air inlet burner.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide an upper intake burner capable of effectively avoiding the mutual influence of the inner ring and the outer ring when primary air is entrained, in view of the above-mentioned current state of the art.

The second technical problem to be solved by the present invention is to provide an upper air inlet burner, which can effectively lengthen the length of the ejector pipe corresponding to the central mixing cavity without changing the height of the whole burner, in view of the above-mentioned current state of the art.

The third technical problem to be solved by the present invention is to provide a cooker burner that is not prone to yellow flame and weak fire, in view of the above-mentioned current state of the art.

The fourth technical problem to be solved by the present invention is to provide a cooker burner that is not prone to explosion due to reverse flow of fuel gas caused by blockage of an injector, in view of the above-mentioned current state of the art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the upper air inlet burner comprises a base, wherein a first ejector and at least two second ejectors which are independent from each other are accommodated in the base;

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 pipes are circumferentially arranged at intervals on the outer disc body, and each second injection pipe is provided with an axis which is 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 pipe;

the method is characterized in that: the liquid filling device is characterized by further comprising a liquid containing disc, a boss capable of supporting the liquid containing disc extends to the periphery of the outer peripheral wall of the base below the second ejector, an air supplementing channel for supplementing air is formed between the liquid containing disc and the bottom wall of the connecting body, a flow dividing piece is arranged in the air supplementing channel and divides the air supplementing channel into a first air supplementing channel and a second air supplementing channel which are independent relatively, and the first air supplementing channel is communicated with the outside and the first ejector in the concave cavity; the second air replenishing channel is communicated with the outside and the second ejector.

In order to avoid the mutual influence of the inner ring and the outer ring when primary air is sucked, one scheme is as follows: the reposition of redundant personnel piece is including following U type scute that diapire circumference, interval of connector set up, each the inboard edge of U type scute is connected through annular ring, each be formed with first clearance between two vertical baffles of U type scute, and is adjacent be formed with the second clearance between the U type scute, first clearance and second clearance all communicate the atmosphere, form mutually independent be used for to first tonifying qi passageway of first sprayer tonifying qi in the cavity with be used for to the second tonifying qi passageway of second sprayer tonifying qi.

The other scheme is as follows: the flow dividing piece comprises an annular partition plate, opposite sides of the annular partition plate are punched upwards and folded to form two vertical baffle plates, a third gap is formed by the two vertical baffle plates and the annular partition plate in a surrounding mode, a fourth gap is formed between every two adjacent vertical baffle plates, the third gap and the fourth gap are communicated with the atmosphere, and a first air supplementing channel used for supplementing air to the first ejector in the cavity and a second air supplementing channel used for supplementing air to the second ejector, which are mutually independent, are formed.

The present invention provides the following solution for solving the second technical problem, wherein the base has a hollow cylindrical part, the top wall of the hollow cylindrical part is recessed downwards to form a cavity, and the base also has an outer peripheral wall at the periphery of the peripheral wall of the cavity; the first ejector is arranged on the bottom wall of the concave cavity, and the first injection pipe is arranged opposite to the first ejector; the second ejector is arranged on the peripheral wall of the base, and each second ejector corresponds to the corresponding second injection pipe in a relative mode.

In order to ensure that the distance between the second ejector and the air inlet of the second injection pipe 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.

When the periphery cavity is a periphery cavity that link up each other, the lower extreme of periphery cavity is opened and is the open end, the base still includes the base, the central authorities of base are upwards protruding to be equipped with protruding circle, the lower extreme of periphery cavity can support and lean on the protruding circle.

In order to realize the overall stability of the combustor and the convenience of installation, the bottom of the base is further provided with an annular convex wall positioned on the periphery of the convex ring, the convex ring is connected with the annular convex wall through a connecting rib, a convex block is arranged below the annular convex wall in a downward protruding mode, and a mounting hole is formed in the convex block.

The design scheme of the invention is characterized in that a conventional bottom cup positioned below the liquid containing disc is omitted, and the base is partially 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 pipe is relatively short, and the injection capacity is improved; on the other hand, the base is provided with a space for the first ejector pipe to extend into, so that the first ejector pipe can be longer, the second ejector is higher than the first ejector, a boss extends from the peripheral wall of the peripheral chamber to the periphery of the lower portion of the second ejector, and the boss can support the liquid containing disc.

In order to enable the distance between the second ejector and the air inlet of the second injection pipe to be relatively short and improve the injection capacity, the second injection pipe is a radial venturi pipe and is arranged on the inner peripheral edge of the outer disc body, and the air inlet of the second injection pipe 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 pipe can be completely limited in the tubular structure which is arranged on the inner peripheral 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 surface is arranged at the outer end of the outer periphery of the outer disc body in an upward protruding mode, an inner ring wall surface is arranged at the pipe wall of the second ejector pipe in an upward protruding mode, the outer ring fire cover covers the inner ring wall surface and the outer ring wall surface, and the inner ring wall surface, the outer periphery of the outer disc body and the outer ring fire cover jointly enclose the second air 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 abuts against the inner ring wall surface, the outer ring wall abuts against the outer ring wall surface, 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 burner is regulated and controlled by a valve, an inner ring fire and an outer ring fire can be used simultaneously or an inner ring fire can be used independently, particularly, the flames in the circumferential directions of the inner part, the center and the outer part basically have no turbulence and interference, and simultaneously, 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 pipe, 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 fed directly from the first injector, the first ejector pipe, while the mixture of the second gas mixing chamber is fed directly from the second injector, the second ejector pipe, fluidly separate from the first and second gas mixing chambers, whereby it can be fed separately.

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 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 pipe is relatively close, and the injection capacity is improved; on the other hand, the traditional outer ring gas mixing chamber and the traditional inner ring gas mixing chamber are designed into a split structure, after the outer ring fire cover is taken during cleaning, only the inner ring gas mixing chamber and the liquid containing disc which is basically in a plane are left, the cleaning is convenient, the liquid containing disc has the function of directionally guiding liquid soup, the phenomenon that the liquid containing disc is blackened due to the fact that soup overflowing liquid is burnt to be dry can be effectively prevented, the cleaning is easy, meanwhile, the gap between the connecting plate and the liquid containing disc greatly increases the area of a primary air channel for supplying the first ejector and the second ejector, the two independent air supply channels are formed through the separation function of the split flow piece, the mutual entrainment effect of hot air flow after combustion and the high temperature of the burner on primary air for supplying the first ejector and the second ejector is effectively avoided, the air supply effect is effectively improved, the flame of the upper air inlet burner is short, uniform and powerful, and yellow flame cannot occur, Tempering and the like.

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 (with the flow divider omitted);

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

FIG. 4 is a schematic structural view of a shunt according to embodiment 1 of the present invention;

FIG. 5 is a schematic structural view of the bottom of the susceptor in embodiment 1 of the present invention;

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

FIG. 7 is a schematic structural view of the front surface of a connecting body in example 1 of the present invention;

FIG. 8 is a schematic structural view of an upper air intake burner of embodiment 2 of the present invention;

fig. 9 is a schematic structural view of a flow divider in embodiment 2 of the present invention;

FIG. 10 is a schematic view showing the structure of an upper air inlet burner according to embodiment 3 of the present invention (a flow divider is omitted);

FIG. 11 is an exploded view of FIG. 10;

FIG. 12 is a cross-sectional view of FIG. 10;

fig. 13 is a sectional view of the bottom of the 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

Example 1

As shown in fig. 1 to 7, the top intake burner of the present invention, which is suitable for both conventional top intake burners and italian savart burners such as europe, comprises a base 1, a first injector 11 and at least two second injectors 12, wherein the first injector 11 is accommodated in the base 1 and is in fluid separation with each other; the number of the present 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 pipes 221 are circumferentially arranged at intervals on the outer disc body 22, and the second injection pipes 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 pipe 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 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 pipe 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 conventional bottom cup below the liquid containing disc 6 can be omitted in the design scheme of the invention, the base 1 is locally 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 pipes 221 is relatively short, 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 periphery of 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, and then 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 pipe 221 arranged opposite to the second injector 12 is a radial venturi pipe and is arranged on the inner circumferential edge 221 of the outer tray body 22, and in order to improve the injection capability of the second injection pipe 221, an air inlet of the second injection pipe 221 extends inwards towards the inner tray body 21 to the air replenishing cavity 7 enclosed between the inner tray body 21 and the outer tray body 22, so that the second injection pipe 221 is made longer and is closer to the second injector 12. While the outer peripheral edge 222 of the outer disc 22 extends in a horizontal direction along the outlet of the second ejector 12, an outer ring wall surface 2221 is convexly arranged at the outer end of the outer circumferential edge 222 of the outer disc body 22, an inner ring wall surface 2211 is convexly arranged at the tube wall of the second ejector tube 221, an outer ring fire cover 4 covers the inner ring wall surface 2211 and the outer ring wall surface 2221, the inner ring wall surface 2211, the outer ring wall surface 2221, the outer circumferential edge 222 of the outer disc body 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 and the inner ring wall surface 2211 are abutted, the outer ring wall 43 and the outer ring wall surface 2221 are abutted, the inner ring wall 42 is circumferentially provided with outer fire holes 421 in a spaced mode, and the outer ring fire cover 4 can be easily assembled on the outer disc body 22 by the cooperation mode.

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 pipe 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 arrows) 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 fire cover 3 and is ignited together with the secondary air of the external environment to form the inner 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 pipe 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 into the first injection pipe 211 and the second injection pipe 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.

In order to effectively avoid the mutual entrainment of hot air flow after combustion and high temperature of a combustor on primary air supplied to the first ejector and the second ejector, an air supply channel for supplying air is formed between the liquid containing disc 6 and the bottom wall of the connecting body 2, a flow dividing piece 100 is arranged in the air supply channel, the flow dividing piece 100 can divide the air supply channel into a first air supply channel 101 and a second air supply channel 102 which are independent relatively, and the first air supply channel 101 is communicated with the outside and the first ejector 11 in the cavity 13; the second air supply channel 102 is communicated with the outside and the second injector 12, specifically, the flow divider 100 comprises U-shaped angle plates arranged at intervals along the circumferential direction of the bottom wall of the connecting body 2, the inner side edges of the U-shaped angle plates are connected through an annular ring 103, a first gap 105 is formed between two vertical partition plates 104 of each U-shaped angle plate, a second gap 106 is formed between adjacent U-shaped angle plates, the first gap 105 and the second gap 106 are communicated with the atmosphere, and a first air supply channel 101 used for supplying air to the first injector 11 in the cavity 13 and a second air supply channel 102 used for supplying air to the second injector 12 which are independent from each other are formed.

Example 2

As shown in fig. 8 and 9, the structure is substantially the same as that of embodiment 1, the only difference being: the flow divider 100 comprises an annular partition plate 107, opposite sides of the annular partition plate 107 are punched and folded upwards to form two vertical baffle plates 108, each two vertical baffle plates 108 and the annular partition plate 107 enclose a third gap 109, a fourth gap 110 is formed between every two adjacent vertical baffle plates 108, the third gap 109 and the fourth gap 110 are communicated with the atmosphere, and a first air supply channel 101 'for supplying air to the first injector 11 in the concave cavity 13 and a second air supply channel 102' for supplying air to the second injector 12 which are independent from each other are formed.

Example 3

As shown in fig. 10 to 13, 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 combustor (see the dotted arrow of fig. 12).

Claims (15)

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 pipes (221) are circumferentially arranged on the outer disc body (22) at intervals, and the second injection pipes (221) are provided with axes which are 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 gas mixing chamber (31) corresponds to the first injection pipe (211), and the second gas mixing chamber (40) corresponds to the second injection pipe (221);

the method is characterized in that: the liquid filling device is characterized by further comprising a liquid containing disc (6), a boss (141) capable of supporting the liquid containing disc (6) extends outwards from the periphery wall of the base (1) below the second ejector (12), an air supplementing channel for supplementing air is formed between the liquid containing disc (6) and the bottom wall of the connecting body (2), a flow dividing piece (100) is arranged in the air supplementing channel, the air supplementing channel is divided into two relatively independent first air supplementing channels (101; 101 ') and second air supplementing channels (102; 102 '), and the first air supplementing channels (101; 101 ') are communicated with the outside and the first ejector (11) in the cavity (13); the second air make-up passage (102; 102') communicates with the outside and the second ejector (12).

2. The upper intake burner of claim 1, wherein: the flow dividing piece comprises U-shaped angle plates arranged along the circumferential direction of the bottom wall of the connecting body (2) at intervals, the inner side edges of the U-shaped angle plates are connected through an annular ring (103), a first gap (105) is formed between two vertical partition plates (104) of each U-shaped angle plate, a second gap (106) is formed between every two adjacent U-shaped angle plates, the first gap (105) and the second gap (106) are communicated with the atmosphere, and a first air supplementing channel (101; 101 ') used for supplementing air to a first ejector (11) in the cavity (13) and a second air supplementing channel (101; 101') used for supplementing air to a second ejector (12) which are independent from each other are formed.

3. The upper intake burner of claim 1, wherein: the flow dividing piece comprises an annular partition plate (107), opposite sides of the annular partition plate (107) are punched and folded upwards to form two vertical baffle plates (108), each vertical baffle plate (108) and the annular partition plate (107) enclose a third gap (109), a fourth gap (110) is formed between every two adjacent vertical baffle plates (108), the third gap (109) and the fourth gap (110) are communicated with the atmosphere, and a first air supplementing channel (101; 101 ') used for supplementing air to a first ejector (11) in the cavity (13) and a second air supplementing channel (102; 102') used for supplementing air to a second ejector (12) which are independent of each other are formed.

4. The upper intake burner of any one of claims 1 to 3, wherein: the base (1) is provided with a hollow columnar part, the top wall of the hollow column is downwards sunken to form a concave cavity (13), and the base (1) is also provided with an outer peripheral wall at the periphery of the peripheral wall of the concave cavity (13); the first ejector (11) is arranged on the bottom wall of the cavity (13), and the first injection pipe (211) is arranged opposite to the first ejector (11); (ii) a The second ejectors (12) are arranged on the peripheral wall of the base (1), and each second ejector (12) is opposite to the corresponding second injection pipe (221).

5. The upper intake burner of claim 4, wherein: the second injectors (12) are all higher than the first injectors (11).

6. The upper intake burner of claim 5, 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).

7. The upper intake burner of claim 6, 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).

8. The upper intake burner of claim 7, 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).

9. The upper intake burner of any one of claims 1 to 3, wherein: the second ejector pipe (221) is a radial venturi tube and is arranged on the inner circumferential edge (221) of the outer tray body (22), and an air inlet of the second ejector pipe (221) extends inwards to the inner tray body (21) to an air supplementing cavity (7) enclosed between the inner tray body (21) and the outer tray body (22).

10. The upper intake burner of claim 9, 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 the second draws tub (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).

11. The upper intake burner of claim 10, 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.

12. The upper intake burner of claim 10 or 11, 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).

13. The upper intake burner of claim 12, 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).

14. The upper intake burner of claim 13, 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 pipe (221), and the outer edge (212) forms a waterproof eaves above the second injector (12).

15. The upper intake burner of claim 14, 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).

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