CN110848688A - 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 invention has the advantages that three 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 burner on primary air supplied to the first ejector and the second ejector and secondary air supplied to the fire outlet area of the first air mixing chamber and the fire outlet area of the second air mixing chamber is effectively avoided, the air supply effect is effectively improved, and the defects of yellow flame, tempering and the like are not easy to occur to the upper air inlet 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.

At present, the mode of going up air inlet combustor supplemental air is the mode of going up admitting air, and required primary air gets into from the kitchen face top during the burning of this type of combustor draws and penetrates the pipe, nevertheless because the effect of drawing of hot air current of burning, interior, outer fire lid all can through mixing the air chamber entrainment primary air and secondary air, in order to prevent that inside and outside ring can influence each other when the entrainment secondary air, realizes the abundant burning of inside and outside ring simultaneously, still need do further improvement.

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 and secondary air are sucked.

The second technical problem to be solved by the present invention is to provide an upper air inlet burner, in which the length of the injection pipe corresponding to the central mixing cavity can be effectively lengthened 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 injector blockage, 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: 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 disk body and an outer disk body which are concentrically arranged at intervals, a vertical first injection pipe is arranged at the central position of the inner disk body, at least two independent second injection pipes are circumferentially arranged at intervals on the outer disk body, each second injection pipe is provided with an axis inclined relative to the horizontal plane, the first injection pipe is arranged opposite to the first ejector, and the second injection pipes are arranged opposite to the second ejector; 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 mixing device is characterized by further comprising a liquid containing disc, a boss capable of supporting the liquid containing disc extends outwards from the periphery 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, a second air supplementing channel and a third air supplementing channel which are independent relatively, and the first air supplementing channel is communicated with the fire outlet area of the first air mixing chamber and the fire outlet area of the second air mixing chamber; the second air supplementing channel is communicated with the outside and the first ejector in the concave cavity; the third air replenishing channel is communicated with the outside and the second ejector.

In order to avoid the inner and outer rings to influence each other when sucking primary air and secondary air, the reposition of redundant personnel piece is including following the U type scute that diapire circumference, interval set up of connector, each the inboard edge of U type scute is connected through the annular ring, each be formed with first clearance between two vertical baffles of U type scute, 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 the third tonifying qi passageway of second sprayer tonifying qi in the cavity with be used for to the second tonifying qi passageway of first sprayer tonifying qi.

In order to better enable the diverter to divide the air passage into two parts for separating the first ejector and the second ejector, the diverter comprises a top plate partially covering two vertical partition plates of the U-shaped angle plate, and the top plate is arranged at a position adjacent to the annular ring and higher than the second ejector.

In order to better enable the flow dividing piece to divide air into air supplementing cavities which are respectively and correspondingly arranged between the first ejector and the second ejector and between the inner disc body and the outer disc body, a circle of annular partition plate is commonly supported on the outer side end of each top plate, and a third gap for enabling air to enter the concave cavity is formed between the outer side end of each top plate and the bottom of the inner disc body in the connecting body. The annular partition plate can block a part of air entering the first ejector from an air supplementing cavity enclosed between the inner disc body and the outer disc body so as to better supplement secondary air for a fire outlet area of the first air mixing chamber and a fire outlet area of the second air mixing chamber.

Furthermore, the two vertical partition plates of the U-shaped corner plate gradually incline upwards from outside to inside, a partition plate extends from the outer side end of the top plate partially along a second gap between the adjacent U-shaped corner plates, a fourth gap is formed between the upper surface of the partition plate and the bottom of the outer plate body, and the fourth gap is communicated with the atmosphere to form a first air supply channel for communicating the fire outlet area of the first air mixing chamber with the outside and the fire outlet area of the second air mixing chamber.

Preferably, in order to realize the matching between the flow dividing member and the second injection pipe and form a more independent third air supply channel between the flow dividing member and the second injection pipe, the first side wall and the second side wall of the partition plate also extend circumferentially to the first gap between the adjacent U-shaped corner plates respectively so as to partially cover the first gap, and the first side wall and the second side wall together with the outer end of the top plate form a gap for the second injection pipe to be inserted into.

Further, in order to divide the air into a supplementary channel for supplementing primary air to the first ejector and the second ejector and a supplementary channel for supplementing secondary air to the fire outlet area of the first air mixing chamber and the fire outlet area of the second air mixing chamber at the beginning when the external air enters the burner, the outer periphery of the partition plate extends horizontally towards the outer disc body and is positioned between the liquid containing disc and the connecting body.

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.

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 pipe.

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 gas inlet of the second injection pipe 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 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 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 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 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 pipe 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.

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 air mixing chamber and inner ring air mixing chamber are designed into a split structure, after the outer ring fire cover is taken out during cleaning, only the inner ring air 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 guiding liquid soup in a directional mode, the phenomenon that the liquid containing disc is blackened due to the fact that soup overflowing liquid is burnt out 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 and a secondary air supplementing channel for communicating the outside with a fire outlet area of the first air mixing chamber and a fire outlet area of the second air mixing chamber, three independent air supplementing channels are formed through the separation function of the split pieces, and the hot air flow after combustion and the high temperature of the combustor are effectively prevented from supplementing the primary air for the first ejector and the second ejector and the fire outlet area for the first air mixing chamber, The secondary air in the fire outlet area of the second air mixing chamber is sucked by each other, so that the air supply effect is effectively improved, the flame of the upper air inlet burner 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 (with the flow divider omitted);

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

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

fig. 5 is a schematic structural view of a flow divider in embodiment 1 of the present invention;

FIG. 6 is a cross-sectional view of the flow divider of FIG. 5;

FIG. 7 is a schematic structural view of the bottom of the susceptor in embodiment 1 of the present invention;

FIG. 8 is a schematic structural view of the bottom surface of a connecting body in example 1 of the present invention;

FIG. 9 is a schematic structural view of the front surface of a connecting body in example 1 of the present invention;

fig. 10 is a schematic structural view of a flow divider in embodiment 2 of the present invention;

FIG. 11 is a cross-sectional view of the shunt member of FIG. 10;

FIG. 12 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. 13 is an exploded view of FIG. 12 (with the flow divider omitted);

FIG. 14 is a cross-sectional view of FIG. 12;

fig. 15 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

As shown in fig. 1 to 9, 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 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 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 pipes 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 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 to the direction of 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 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 pipe 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 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 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 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 entering 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 after combustion and high temperature of the burner on primary air supplied to the first ejector and the second ejector and secondary air supplied to the fire outlet area of the first air mixing chamber 31 and the fire outlet area of the second air mixing chamber 40, 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 air supply channel can be divided into three relatively independent first air supply channels 101, second air supply channels 102 and third air supply channels 103 by the flow dividing piece 100, and the first air supply channels 101 are communicated with the fire outlet area of the external fire holes 421 of the first air mixing chamber 31 and the fire outlet area of the internal fire holes 32 of the second air mixing chamber 40 from the outside; the second air supply channel 102 is communicated with the outside and the first ejector 11 in the concave cavity 13; the third makeup passage 103 communicates the outside with the second injector 12.

The flow dividing member 100 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 104, a first gap 106 is formed between two vertical partition plates 105 of each U-shaped angle plate, a second gap 107 is formed between adjacent U-shaped angle plates, the first gap 106 and the second gap 107 are communicated with the atmosphere, and a third air supplementing channel 103 used for supplementing air to the second ejector 12 in the cavity 13 and a second air supplementing channel 102 used for supplementing air to the first ejector 11 which are mutually independent are formed. To better enable the splitter 100 to split the air passage into two parts separating the first ejector 11 and the second ejector 12, the splitter 100 comprises a top plate 108 partially covering two vertical partitions 105 of the U-shaped gusset, the top plate 108 being located adjacent to the annular ring 104 and higher than the second ejector 12. In order to better enable the splitter 100 to split the air into the air compensation chamber 7 enclosed between the first injector 11 and the second injector 12 and between the inner disc 21 and the outer disc 22, respectively, a ring-shaped baffle 109 is supported on the outer side of each top plate 108, and a third gap 110 for the air to enter the cavity 13 is provided between the bottom of the inner disc 21 in the connecting body 2. The outer end of the top plate 108 partially extends along the second gap 107 between adjacent U-shaped corner plates to form a partition plate 111, a fourth gap 112 is formed between the upper surface of the partition plate 111 and the bottom of the outer tray body 22, and the fourth gap 112 is communicated with the atmosphere to form a first air supplementing channel 101 for communicating the outside with the fire outlet area of the first air mixing chamber 31 and the fire outlet area of the second air mixing chamber 40. In order to realize the matching of the flow divider 100 and the second ejector pipe 221, a more independent third air supply channel is formed between the flow divider 100 and the second ejector pipe 221, two vertical partition plates 105 of the U-shaped angle plate gradually incline upwards from outside to inside, the first side wall 111a and the second side wall 111b of the partition plate 111 also extend circumferentially towards the second gap 107 between the adjacent U-shaped angle plates respectively to partially cover the first gap 106, and the first side wall 111a and the second side wall 111b together with the outer end of the top plate 108 form a gap 112 for the second ejector pipe 221 to insert. Further, in order to divide the air into the supplementary channel for supplementing the primary air to the first injector 11 and the second injector 12 and the supplementary channel for supplementing the secondary air to the fire region of the first air mixing chamber 31 and the fire region of the second air mixing chamber 40 at the beginning of the external air entering the burner, the outer circumference of the partition plate 111 extends horizontally toward the outer tray body 22 along the 111c and is located between the liquid containing tray 6 and the connection body 2.

Example 2

As shown in fig. 10 and 11, the structure is substantially the same as that of embodiment 1, the only difference being: the structure of the flow divider 100 is different, the flow divider 100 of this embodiment omits a ring of annular partition 109 and the outer periphery 111c of the partition 111 supported on the outer side end of each top plate 108 in embodiment 1, but still has three independent air supply channels for dividing the air channel, specifically, the flow divider 100 includes U-shaped corner plates arranged at intervals along the circumference of the bottom wall of the connecting body 2, the inner side edges of the U-shaped corner plates are connected by an annular ring 104, a first gap 106 is formed between two vertical partition plates 105 of each U-shaped corner plate, a second gap 107 is formed between adjacent U-shaped corner plates, the first gap 106 and the second gap 107 are both communicated with the atmosphere, and a third air supply channel 103 for supplying air to the second injector 12 in the cavity 13 and a second air supply channel 102 for supplying air to the first injector 11 are formed independently. To better enable the splitter 100 to split the air passage into two parts separating the first ejector 11 and the second ejector 12, the splitter 100 comprises a top plate 108 partially covering two vertical partitions 105 of the U-shaped gusset, the top plate 108 being located adjacent to the annular ring 104 and higher than the second ejector 12. The outer end of the top plate 108 partially extends along the second gap 107 between the adjacent U-shaped corner plates to form a partition plate 111 ', a fourth gap 112 is formed between the upper surface of the partition plate 111' and the bottom of the outer tray body 22, and the fourth gap 112 is communicated with the atmosphere to form a first air supplementing channel 101 for communicating the outside with the fire outlet area of the first air mixing chamber 31 and the fire outlet area of the second air mixing chamber 40. In order to realize the matching of the flow divider 100 and the second injection pipe 221, so that a more independent third air supplement channel is formed between the flow divider 100 and the second injection pipe 221, the two vertical partition plates 105 of the U-shaped corner plate are gradually inclined upwards from outside to inside, and the first side wall 111a ' and the second side wall 111b ' of the partition plate 111 ' also extend circumferentially towards the second gap 107 between the adjacent U-shaped corner plates.

Example 3

As shown in fig. 12 to 15, 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).

Claims (19)

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, each second injection pipe (221) is provided with an axis inclined relative to a horizontal plane, the first injection pipe (211) is opposite to the first injector (11), and the second injection pipes (221) are opposite to the second injector (12); 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 mixing device is characterized by further comprising a liquid containing disc (6), a boss (141) capable of supporting the liquid containing disc (6) extends to the periphery of 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 three relatively independent first air supplementing channels (101), second air supplementing channels (102) and third air supplementing channels (103) by the flow dividing piece (100), and the first air supplementing channels (101) are communicated with an external fire outlet area of the first gas mixing chamber (31) and a fire outlet area of the second gas mixing chamber (40); the second air replenishing channel (102) is communicated with the outside and the first ejector (11) in the concave cavity (13); the third air replenishing channel (103) is communicated with the outside and the second ejector (12).

2. The upper intake burner of claim 1, wherein: the flow dividing piece (100) comprises U-shaped angle plates arranged along the circumferential direction and at intervals 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 (104), first gaps (106) are formed between two vertical partition plates (105) of each U-shaped angle plate, a second gap (107) is formed between the adjacent U-shaped angle plates, the first gaps (106) and the second gaps (107) are communicated with the atmosphere, and a third air supplementing channel (103) which is used for supplementing air to a second ejector (12) in the cavity (13) and a second air supplementing channel (102) which is used for supplementing air to the first ejector (11) are formed and are independent from each other.

3. The upper intake burner of claim 2, wherein: the splitter (100) includes a top plate (108) partially covering the two vertical partitions of the U-shaped gusset, the top plate (108) being disposed adjacent the annular ring (104) and above the second injector (12).

4. The upper intake burner of claim 3, wherein: a ring-shaped partition plate (109) is supported on the outer side end of each top plate (108) together, and a third gap (110) for air to enter the cavity (13) is formed between the ring-shaped partition plate and the bottom of the inner disc body (21) in the connecting body (2).

5. The upper intake burner of claim 4, wherein: and a partition plate (111; 111 ') extends from the outer end of the top plate (108) partially along a second gap (107) between adjacent U-shaped corner plates, a fourth gap (112) is formed between the upper surface of the partition plate (111; 111') and the bottom of the outer tray body (22), and the fourth gap (112) is communicated with the atmosphere to form a first air supply channel (101) for communicating the fire outlet area of the first air mixing chamber (31) and the fire outlet area of the second air mixing chamber (40).

6. The upper intake burner of claim 5, wherein: the two vertical partition plates of the U-shaped corner plate are gradually inclined upwards from outside to inside, the first side wall (111 a; 111a ') and the second side wall (111 b; 111b ') of each partition plate (111; 111 ') also extend towards the circumferential direction of the second gap (107) between the adjacent U-shaped corner plates respectively so as to partially cover the first gap (106), and the first side wall (111 a; 111a ') and the second side wall (111 b; 111b ') and the outer end of the top plate (108) jointly form a notch (112) for inserting the second injection pipe (221).

7. The upper intake burner of claim 6, wherein: the outer circumference edge (111c) of the partition plate (111; 111') also extends horizontally towards the outer tray body (22) and is positioned between the liquid containing tray (6) and the connecting body (2).

8. The upper intake burner of any one of claims 1 to 7, 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); 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).

9. The upper intake burner of claim 8, wherein: the second injectors (12) are all higher than the first injectors (11).

10. The upper intake burner of claim 9, 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).

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

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

13. The upper intake burner of any one of claims 1 to 7, 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).

14. The upper intake burner of claim 13, wherein: the periphery of outer disk body (22) is followed along (222) the gas outlet of second sprayer (12) extends on the horizontal direction, and the periphery of outer disk body (22) is equipped with outer lane wall (2221) along the outer end of (222) upwards protruding, the pipe wall that second draws tub (221) is equipped with inner circle wall (2211) upwards protruding, 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 along (222) and outer ring fire lid (4) jointly and are established second gas-mixing chamber (40).

15. The upper intake burner of claim 14, 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.

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

17. The upper intake burner of claim 16, 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).

18. The upper intake burner of claim 17, 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).

19. The upper intake burner of claim 18, 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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