CN111121026A

CN111121026A - Fire cover and upper air inlet burner and stove with same

Info

Publication number: CN111121026A
Application number: CN201811290400.5A
Authority: CN
Inventors: 兰华
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-05-08

Abstract

The invention relates to a fire cover and an upper air inlet burner and a cooker applying the fire cover, which comprise a gas mixing chamber and a fire cover covering the gas mixing chamber, and are characterized in that: the nozzle seat is positioned below the air mixing chamber; the first ejector is arranged in the center of the nozzle seat and extends out of the panel on the nozzle seat, the air inlet end of the first ejector pipe is opposite to the first ejector, and the air outlet end of the first ejector pipe is communicated with the air mixing chamber; the first fire hole is at least provided with two communicated gas mixing chambers and is arranged in the area of the fire cover adjacent to the wall surface of the inner ring at intervals along the circumferential direction; the secondary air channel communicated with the fire outlet area of the first fire hole and the outside is formed by enclosing the inner ring wall.

Description

Fire cover and upper air inlet burner and stove with same

Technical Field

The invention relates to a fire cover of a gas cooker, in particular to an upper air inlet burner applying the fire cover and a cooker.

Background

At present, a complete upper air inlet type burner is used in a plurality of gas cookers, and because primary air and secondary air required by the complete upper air inlet type burner during burning are both from the upper part of a cooker panel, a chassis of the gas cooker can be completely sealed. However, the conventional burner with complete upward air intake is realized by the gap between the air mixing chamber and the base when primary air is supplemented, and therefore, the problem is that the gap exists between the air mixing chamber and the base, and after the mounting screw of the panel is mounted, the mounting screw can be seen from the outside of the burner, so that the appearance of the burner is not beautiful enough. Moreover, after the gap is formed between the base and the air mixing chamber, the overflowing liquid can flow into the base and the round basin-shaped main body positioned below the panel, namely the bottom cup, through the gap, so that much inconvenience is brought to maintenance and cleaning of a user, and the normal use of the burner can be influenced if the overflowing liquid cannot be removed for a long time. In addition, the structure of the 'bottom cup' causes the connecting part of the outlet of the injection pipe and the mixed gas channel to have sharp bend, which obviously increases injection resistance, and the design is like Chinese utility model patent ZL201120156854.0 (No. CN202082922U), the injection effect is not good, meanwhile, the primary air supplemented from the panel of the upper air inlet burner enters the 'bottom cup' by utilizing the negative pressure generated by the gas injected by the nozzle, which easily causes the uneven distribution of the air flow of the primary air and influences the primary air coefficient to a certain extent, thereby causing the uneven gas pressure flowing out from the fire holes arranged along the circumferential direction of the outer ring fire cover or the inner ring fire cover, thereby causing the uneven flame of the outer ring fire generated by the outer ring fire cover or the inner ring fire generated by the inner ring fire cover, and simultaneously, the second injection pipe and the first injection pipe of the burner are both arranged with the 'bottom cup', or with the setting of end cup components of a whole that can function independently, no matter the problem that the effect of drawing is poor is drawn in the influence that sets up with "end cup" an organic whole, still with the potential safety hazard that the seam produced that sets up the body that sets up with end cup components of a whole that can function independently brought, all need make further improvement to current last air inlet combustor. In addition, the invention discloses a multi-nozzle, large-flow and completely upward air inlet embedded type burner for a household gas stove (with the publication number of CN101446415A) as Chinese invention patent application with the application number of 200810220263.8, wherein the invention respectively arranges the inner nozzle and the outer nozzle corresponding to the inner ring ejector and the outer ring ejector at two sides in the diameter range of the burner, which can effectively improve the limitation of short length of the ejector pipe, simultaneously can realize independent adjustment of the inner flame and the outer flame, has higher combustion power, and becomes the mainstream trend of the upper air inlet burner pursuing high power, but because the inner ring ejector and the outer ring ejector are still arranged in a bottom cup, the integral height of the burner is still higher, and the integral aesthetic property is poorer.

And this gas-cooker for kitchen range in addition has the annular chamber between inner ring fire lid and the outer ring fire lid, and the secondary air passageway all needs to supply secondary air for inner ring fire lid through the annular chamber, and then the space of some annular chamber has been occupied to the inner ring fire lid to lead to the corresponding reduction of supplementary area of secondary air, the combustion thermal efficiency of inner ring fire lid reduces, still remains to further improve for this reason on combustor inner structure and combustion effect.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a fire cover capable of increasing the effective area of the inner ring for supplementing air in view of the above prior art.

The second technical problem to be solved by the present invention is to provide an upper intake burner which can improve the thermal efficiency of the inner ring combustion by using the fire cover in view of the above prior art.

The third technical problem to be solved by the present invention is to provide an upper intake burner which can achieve high thermal power and effectively reduce the entire height of the burner, in view of the above-mentioned current state of the art.

A fourth technical problem to be solved by the present invention is to provide an upper intake air burner that can sufficiently supplement air and can sufficiently burn, in view of the above-mentioned prior art.

A fifth technical problem to be solved by the present invention is to provide an upper inlet air burner which is convenient for users to clean in view of the above prior art.

The sixth technical problem to be solved by the present invention is to provide a cooking stove using the above upper intake burner, aiming at the above prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a fire lid, fire lid is including annular body, the inboard edge of the annular roof of body, outside edge respectively downwardly extending form inner circle wall and outer circle wall, its characterized in that: the first fire hole is formed in the inner ring wall, and a secondary air channel communicated with the outside and the fire outlet area of the first fire hole is formed by the inner ring wall in a surrounding mode.

The invention provides an upper air inlet burner applying the fire cover, the upper air inlet burner, a mounting seat and an air mixing chamber arranged on the mounting seat, wherein the air mixing chamber comprises an inner ring wall surface, an outer ring wall surface and a bottom wall for connecting the inner ring wall surface and the outer ring wall surface, the inner ring wall surface and the outer ring wall surface are arranged in an annular shape and are concentrically arranged at intervals, the fire cover covers the inner ring wall surface and the outer ring wall surface, the inner ring wall of the fire cover is jointed with the inner ring wall surface of the air mixing chamber, and the outer ring wall of the fire cover is jointed with the outer ring wall surface of the air mixing chamber, the upper air inlet burner is characterized: also comprises

The nozzle seat is positioned below the air mixing chamber;

the first ejector is arranged at the central position of the nozzle seat and extends out of the mounting seat above the nozzle seat;

the gas inlet end of the first injection pipe is opposite to the first ejector, and the gas outlet end of the first injection pipe is communicated with the gas mixing chamber;

and the first fire holes are at least provided with two first fire holes, are communicated with the gas mixing chamber and are circumferentially arranged at the positions, adjacent to the wall surface of the inner ring of the gas mixing chamber, of the inner ring wall of the fire cover at intervals.

In order to realize that the effective area of inner ring supplementary air increases, it forms integral type fire lid to have left "inner ring fire lid" among the prior art, still includes:

the separator is arranged in the gas mixing chamber and divides the gas mixing chamber into a first gas mixing chamber positioned on the inner side and a second gas mixing chamber positioned on the outer side, and the first fire hole is communicated with the first gas mixing chamber;

the second ejector is arranged on the nozzle seat, extends out of the mounting seat and is arranged at an interval with the first ejector;

the second injection pipe is independent of the first injection pipe and arranged in the gas mixing chamber, an air inlet of the second injection pipe is opposite to the second ejector, and an air outlet of the second injection pipe is communicated with the second gas mixing chamber; and

and the second fire holes are at least provided with two second fire holes, are communicated with the second gas mixing chamber and are arranged on the outer ring wall at intervals along the circumferential direction.

The provision of the partition also allows the user to control separately the central and peripheral fires that the burner forms.

For stabilizing the first fire hole, at least two first flame stabilizing holes which are arranged above the first fire hole and along the circumferential direction are also formed in the wall of the inner ring, the first flame stabilizing holes are arranged at intervals in a staggered mode with the first fire hole, and the first flame stabilizing holes are communicated with the first gas mixing chamber.

In order to prevent overflowing liquid from blocking the first fire hole and the first flame stabilizing hole, the inner side edge of the annular top wall of the fire cover extends radially inwards towards the direction of an annular cavity surrounded by the inner ring wall surface, and the blocking wall is provided with a water blocking brim which blocks the first fire hole and the first flame stabilizing hole.

For stabilizing the flame of the first flame stabilizing hole, the retaining wall is extended downwards to form a retaining edge which partially covers the first flame stabilizing hole. When the gas mixture came out from first gas mixing chamber, after striking the flange after first flame vent and first steady flame hole, the velocity of flow of gas mixture was slowed down, flowed from the clearance between flange and the first steady flame hole at last, and the size of steady flame has been decided to the export size that this clearance formed, can be according to the design demand, decides export size with, because of the gas mixture flows out the burning through the striking of flange at last, and air velocity is low, also plays fine steady flame effect.

The flame stabilizing device further realizes the uniformity and stability of flame discharged from the second fire hole, the air inlet end of the second fire hole is positioned at the bottom end of the outer ring wall, the air outlet end of the second fire hole is positioned at the outer ring wall, a first groove is circumferentially formed in the outer ring wall below the air outlet end of the second fire hole, and a second flame stabilizing hole communicated with the first groove is further formed in the bottom end of the outer ring wall.

Furthermore, the first groove is gradually inclined upwards from bottom to top and is intersected with the second fire hole. The first groove is communicated with the second flame stabilizing hole to form a flame stabilizing channel similar to an inverted V shape, so that the flame stabilizing effect is achieved, and meanwhile, liquid overflowing can be prevented from flowing backwards.

In order to prevent spillage from entering the nozzle holder, the outer ring wall extends outwardly to form a protective umbrella that is shielded over the nozzle holder. This design brings the following benefits: the outer ring wall can form a waterproof brim above the nozzle seat to prevent overflow liquid from entering a first ejector and a second ejector on the nozzle seat; the outer ring wall can be made of heat insulating materials so as to prevent flame heat generated by flame coming out from the second fire holes and the second flame stabilizing holes from interfering with primary air supplement of the first ejector and the second ejector on the nozzle seat; and thirdly, the outer ring wall can be used as a 'separation plate' to separate secondary air for supplementing the second fire hole and the second flame stabilizing hole which are communicated with the second air mixing chamber and primary air for supplementing the first ejector and the second ejector on the nozzle seat.

In order to allow the overflowing liquid to flow out of the nozzle holder quickly, the outer ring wall gradually extends downward from top to bottom radially outward of the air mixing chamber.

Furthermore, the gas mixing chamber also comprises a primary air channel, wherein the primary air channel is formed at a position, corresponding to the nozzle seat, on the wall surface of the outer ring and is locally recessed inwards along the radial direction of the gas mixing chamber; the inward recessed outer ring wall surface part is directly used as a separation part for separating the primary air channel and the secondary air channel, and the separation part is provided with an air inlet of the second injection pipe and an air inlet of the first injection pipe.

In order to enhance the injection length and the injection capacity of the first injection pipe, the first injection pipe transversely penetrates through the annular cavity.

Furthermore, at least one part of the bottom wall of the air mixing chamber is recessed to form a support leg at other parts of the periphery of the primary air channel, the interval formed between adjacent support legs is communicated with the secondary air channel, and the secondary air channel is independent from the primary air channel. The primary air channel and the secondary air channel on the lower surface of the air mixing chamber are mutually independent, the local part of the outer ring wall surface is skillfully used as a separating part for separating each other without mutual influence, other separating parts are not required to be additionally added, the structure is simple, and meanwhile, the integral height of the combustor can be ensured not to be too high, and the structure is compact.

In order to effectively reduce the whole height of the combustor, the second injection pipe is skillfully arranged in the gas mixing chamber; and a concave cavity for accommodating the second injection pipe is formed in the supporting leg.

In order to further enable the gas pressure flowing out of the first fire hole and the second fire hole which are circumferentially arranged on the fire cover to be uniform, a pressure stabilizing piece used for stabilizing the pressure of the gas in the gas mixing chamber is arranged in the gas mixing chamber, and the pressure stabilizing piece can partially extend into the concave cavity.

In order to further facilitate the placement of the pressure stabilizer, the pressure stabilizer comprises a plate body, a central hole is formed in the center of the plate body and located on the periphery of the annular cavity, the hole wall of the central hole protrudes upwards to form a circle of convex wall, the convex wall partially forms a part of the flow dividing member, and the outer periphery of the plate body extends in the horizontal direction and can partially cover the concave cavity.

Preferably, the second injection pipe is formed by joining an upper pipe body and a lower pipe body which are adaptive in shape, wherein the lower pipe body is formed by partially sinking the bottom of the supporting leg, and the upper pipe body is formed by sinking the part, corresponding to the convex wall, of the plate body from bottom to top. The splicing seam of the second injection pipe is arranged inside an outer ring gas mixing chamber of the combustor, so that the difficulty and the requirement of a sealing process are reduced.

In order to make the structure in the gas mixing chamber simple and compact, the annular top wall of the fire cover extends from top to bottom to form an annular baffle which is abutted against the convex wall, and the annular baffle is abutted against the convex wall and partially forms the other part of the separator.

The invention provides a cooker applying the upper air inlet burner for solving the last technical problem, which comprises a panel and is characterized in that: the mounting seat is a part of the panel.

The cooker applying the upper air inlet burner can also comprise a liquid containing disc positioned below the burner, and is characterized in that: the liquid containing disc is used as the mounting seat.

Compared with the prior art, the invention has the advantages that the fire cover skillfully omits a concentric multi-ring fire cover structure formed by an inner ring and an outer ring, the fire cover is designed into an integrated fire cover, the air supplement area of a secondary air channel is effectively enlarged, the upper air inlet burner with the fire cover cancels a conventional bottom cup positioned below a liquid containing disc, and a first ejector is directly installed through a nozzle seat, so that the first ejector can directly supplement primary air through air above a panel, in addition, the conventional bottom cup positioned below the liquid containing disc is cancelled, the supplementation is convenient, the sufficient primary air and secondary air supplement amount can be ensured to promote the full combustion of the burner, meanwhile, the first fire hole is arranged in the inner ring area, so that the continuous throttling expansion effect can be formed from the center to the periphery when high-temperature flue gas passes through, the heat exchange coefficient with a pot is increased, from this the increasing of thermal efficiency, gas mixing chamber, fire lid and nozzle holder are easily to dismantle mounting structure, and convenience of customers is clean, and finally, the application has the cooking utensils of above-mentioned last air inlet burner, and the gas mixing chamber uses the support connected mode of support column to be located the panel or flourishing liquid dish on the gas mixing chamber, and the heat conduction of contact improves the thermal efficiency.

Drawings

FIG. 1 is a schematic view of an embodiment of the present invention with an upper inlet burner resting on a panel;

FIG. 2 is a schematic view of the configuration of an upper inlet air burner at an angle (panel omitted) in an embodiment of the invention;

FIG. 3 is a schematic view of another angle configuration of the upper intake burner in an embodiment of the present invention;

FIG. 4 is an exploded view of the angle of FIG. 2;

FIG. 5 is a schematic structural diagram of a fire cover in an embodiment of the present invention;

FIG. 6 is a schematic structural view of the gas mixing chamber according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of the bottom of the air mixing chamber in the embodiment of the present invention;

FIG. 8 is a schematic view of the stabilizer shown in FIG. 6, but without the stabilizer;

FIG. 9 is a cross-sectional view at an angle of FIG. 2;

fig. 10 is a cross-sectional view at another angle of fig. 2.

Detailed Description

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

As shown in FIGS. 1 to 10, the preferred embodiment of the present invention is shown. The upper air inlet burner comprises an air mixing chamber 1, wherein the air mixing chamber 1 comprises an inner ring wall surface 11 and an outer ring wall surface 12 which are arranged in an annular shape and are concentrically arranged at intervals and a bottom wall 13 for connecting the inner ring wall surface 11 and the outer ring wall surface 12, a fire cover 2 covers the inner ring wall surface 11 and the outer ring wall surface 12, the upper air inlet burner skillfully omits a concentric multi-ring fire cover 2 structure formed by an inner ring and an outer ring, but designs the fire cover 2 into an integrated fire cover 2, and further comprises a nozzle seat 3 positioned below the air mixing chamber 1, a first ejector 31 is arranged in the central position of the nozzle seat 3 and extends out of a panel 401 positioned above the nozzle seat 3, and a first ejector pipe 4 opposite to the first ejector 31, an air inlet end 41 of the first ejector pipe 4 is opposite to the first ejector 31, and an air outlet end 42 of the first ejector pipe 4 is communicated with the air mixing chamber 1; the area of the fire cover 2 adjacent to the inner ring wall surface 11 is provided with a plurality of first fire holes 21 which are communicated with the air mixing chamber 1 and are arranged at intervals along the circumferential direction, the particularity of the fire cover 2 is also embodied in that the inner ring wall 22 encloses a secondary air channel 5 which is communicated with the fire outlet area of the outside and the first fire holes 21, the concentric multi-ring inner ring fire cover structure formed by an inner ring and an outer ring in the prior art is ingeniously omitted, the air supply area of the secondary air channel 5 is effectively enlarged, the supplement is convenient, meanwhile, the sufficient primary air and secondary air supplement amount can be ensured to promote the sufficient combustion of a burner, meanwhile, the first fire holes 21 are arranged in the inner ring area, so that the high-temperature flue gas forms a continuous throttling expansion effect from the center to the periphery when passing through, the heat exchange coefficient with a cooker is increased, and the.

Specifically, in order to increase the effective area of the inner ring for supplementing air, the fire cover of the invention has a special structure, and omits the prior art that an "inner ring fire cover" is formed into an integrated fire cover 2, and comprises an annular body, wherein the inner edge and the outer edge of an annular top wall 20 of the body respectively extend downwards to form an inner ring wall 22 jointed with the inner ring wall 11 and an outer ring wall 23 jointed with the outer ring wall 12, and a first fire hole 21 is formed in the inner ring wall 22. In order to independently control the central fire and the peripheral fire formed by the burner by a user, a separator 30 is arranged in the gas mixing chamber 1 and divides the gas mixing chamber 1 into a first gas mixing chamber 13 positioned at the inner side and a second gas mixing chamber 14 positioned at the outer side, and the first fire hole 21 is communicated with the first gas mixing chamber 13; in addition, the gas mixing device further comprises a nozzle seat 3 arranged below the second gas mixing chamber 14, the first ejector 31 is arranged in the center of the nozzle seat 3 and extends out of the panel 401 above the nozzle seat 3, the gas mixing device further comprises a second ejector which is also arranged on the nozzle seat 3 and is arranged at intervals with the first ejector 31, and a second injection pipe which is independent of the first injection pipe 4 and is arranged in the second gas mixing chamber 14, the gas inlet 61 of the second injection pipe is opposite to the second ejector, and the gas outlet 62 is communicated with the second gas mixing chamber 14. The conventional bottom cup positioned below the panel 401 is eliminated by utilizing the nozzle holder 3, and the first ejector 31 and the second ejector are directly installed through the nozzle holder 3, so that the first ejector 31 and the second ejector can directly supplement air through an air channel above the panel 401, the supplement is convenient, and meanwhile, the sufficient air supplement amount can be ensured to promote the full combustion of the combustor; in addition, the conventional bottom cup positioned below the containing panel 401 is eliminated, and meanwhile, the second injection pipe is skillfully arranged in the second gas mixing chamber 14, so that the overall height of the combustor can be reduced, and the potential safety hazard caused by gas leakage when the second injection pipe is connected by a seam can be avoided; the invention adopts a mode of a plurality of ejectors and a plurality of ejector pipes, overcomes the limitation that the ejector pipes are limited in the diameter range of the combustor to cause the size of the ejector pipes to be still short, ensures the primary air ejection capacity of the combustor and realizes large firepower. In this embodiment, the two second ejectors are respectively a first second ejector 32 and a second ejector 32 ', and are symmetrically arranged at two sides of the first ejector 31, and the two second ejection pipes are correspondingly arranged and respectively are a first second ejection pipe 6 and a second ejection pipe 6', so as to prevent the height of the whole burner from being too high, and simultaneously supplement primary air on the panel 401 and ensure sufficient amount of the primary air, the secondary air mixing burner further comprises a primary air channel 7, and the primary air channel 7 is formed at a part, corresponding to the nozzle holder 3, of the outer ring wall surface 12 and is locally recessed inwards along the radial direction of the air mixing chamber 1; the inward recessed outer ring wall surface 12 part is directly used as a separating part 230 for separating the primary air channel 7 and the secondary air channel 5, other separating parts 230 are not required to be additionally arranged, the whole height of the burner can be ensured not to be too high while the structure is simple, the structure is compact, and the separating part 230 is provided with an air inlet 61 of the second injection pipe and an air inlet 41 of the first injection pipe 4. In addition, the bottom wall 13 of the second air mixing chamber 14 is recessed at least at one position to form a leg 10 at other portions of the periphery of the primary air passage 7, and in order to avoid interference between the primary air passage 7 and the secondary air passage 5, the present embodiment is preferably at one position opposite to the nozzle holder 3, for this reason, the space formed between the adjacent legs 10 communicates between the secondary air passage 5 and the outside, and the secondary air passage 5 and the primary air passage 7 are provided independently of each other to prevent interference when the primary air and the secondary air are replenished. Meanwhile, the hollow supporting leg 10 formed in the lower recess not only forms the first cavity 81 for accommodating the first second injection pipe 6 and the second cavity 82 for accommodating the second injection pipe 6', but also effectively reduces the whole height of the burner, in order to further enable the gas pressure flowing out from the fire hole formed in the circumferential direction of the second fire cover 2 to be uniform, the pressure stabilizing piece 9 for stabilizing the gas in the second gas mixing chamber 14 is arranged in the second gas mixing chamber 14, and the pressure stabilizing piece 9 can partially stretch into the first cavity 81 and the second cavity 82.

Each pressure stabilizer 9 includes a plate 91, a central hole 911 is formed in the center of the plate 91 and located on the periphery of an annular cavity 110 defined by the inner ring wall surface 11, the hole wall of the central hole 911 protrudes upward to form a circle of convex wall 9111, the convex wall 9111 partially forms a part of the partitioning member 30, and the outer periphery 910 of the plate 91 extends in the horizontal direction and partially covers the first cavity 81 or the second cavity 82. For the convenience of processing, the first second injection pipe 6 and the second injection pipe 6' are formed by joining an upper pipe body 101 and a lower pipe body 102 which are matched in shape, wherein the lower pipe body 102 is formed by partially sinking the bottom of the supporting leg 10, the upper pipe body 101 is formed by sinking the part of the plate body 91 corresponding to the convex wall 9111 from bottom to top, and the splicing seam of the second injection pipe is arranged in the outer ring gas mixing chamber 1 of the combustor, so that the difficulty and the requirement of the sealing process are reduced. In order to make the structure in the gas mixing chamber 1 simple and compact, the annular top wall 20 of the fire lid 2 extends from top to bottom with an annular baffle 201 abutting against the convex wall 9111, and the annular baffle 201 abuts against the convex wall 9111 and partially constitutes the other part of the partitioning member 30.

Finally, the fire cover 2 of the present invention also has particularity, the fire cover 2 includes an annular body, the inner side edge and the outer side edge of the annular top wall 20 of the body respectively extend downwards to form an inner ring wall 22 jointed with the inner ring wall 11 and an outer ring wall 23 jointed with the outer ring wall 12, the first fire hole 21 is formed on the inner ring wall 22, in order to stabilize the first fire hole 21, the inner ring wall 22 is formed above the first fire hole 21 and is also formed with a plurality of first flame stabilizing holes 221 arranged along the circumferential direction at intervals in a staggered manner with the first fire hole 21, the first flame stabilizing holes 221 are communicated with the first gas mixing chamber 13, in order to prevent the first fire hole 21 and the first flame stabilizing holes 221 from being blocked by spilled liquid, in order to stabilize the first flame stabilizing holes 221, the blocking wall 201 further extends downwards to form a blocking edge 202 which partially blocks the first flame stabilizing holes 221, when the mixed gas comes out from the first gas mixing chamber 13, and then impacts the blocking edge 202 after passing through the first fire hole 21 and the first flame stabilizing holes 221, the flow velocity of the mixed gas is reduced, and the mixed gas finally flows out from the gap between the blocking edge 202 and the first flame stabilizing hole 221, the size of an outlet formed by the gap determines the size of the flame stabilizing fire, the size of the outlet can be determined according to the design requirement, and the mixed gas finally flows out for combustion after being impacted by the blocking edge 202, so that the gas flow velocity is low, and the good flame stabilizing effect is also achieved. In addition, in order to realize the uniformity and stability of flame discharged from the second fire holes 24, the air inlet end 241 of the second fire hole 24 is located at the bottom end of the outer ring wall 23, the air outlet end 242 of the second fire hole 24 is located at the outer ring wall 23, the outer ring wall 23 is circumferentially provided with a first groove 231 below the air outlet end 242 of the second fire hole 24, the bottom end of the outer ring wall 23 is further provided with a second flame stabilizing hole 232 communicated with the first groove 231, the first groove 231 is gradually inclined upwards from bottom to top and intersects with the second fire hole 24, the first groove 231 is communicated with the second flame stabilizing hole 232 to form a flame stabilizing channel similar to an inverted 'V' shape, so that the flame stabilizing effect is achieved, and meanwhile, liquid overflowing can be prevented from flowing backwards. In order to prevent the liquid from entering the nozzle holder 3, the outer ring wall 23 extends outward to form a protective umbrella covering the nozzle holder 3. This design brings the following benefits: the outer ring wall 23 can form a waterproof brim above the nozzle holder 3 to prevent overflow liquid from entering the first ejector 31 and the second ejector on the nozzle holder 3; the outer ring wall 23 can be made of heat insulating materials to prevent the flame heat generated by the flame coming out from the second fire holes 24 and the second flame stabilizing holes 232 from interfering with the supplement of the primary air of the first ejector 31 and the second ejector on the nozzle holder 3; third, the outer ring wall 23 can be used as a "partition plate" to separate the secondary air for supplying the second flame holes 24 and 232 of the second air mixing chamber 14 and the primary air for supplying the first injector 31 and the second injector on the nozzle holder 3. Finally, in order to allow the overflowing liquid to flow out of the nozzle holder 3 quickly, the outer ring wall 23 gradually extends downward from top to bottom radially outward of the air-mixing chamber 1.

In order to reduce the heat conduction in contact with the panel 401 or the liquid containing plate 400 and improve the heat efficiency, the gas mixing chamber 1 uses the support connection mode of the support column 402, as mentioned above, the path of the primary air, the gas and the mixed primary air and gas inside the burner is as follows, as the primary air is sucked into the first injector 31 of the nozzle base 3 from the outside by the kinetic energy of the gas, the pre-mixing of the primary air and the gas is carried out and respectively enters the first gas mixing chamber 13, the mixed primary air and the gas finally pass through the first fire holes 21 and the first flame stabilizing holes 221 of the fire cover 2 and are ignited together with the secondary air of the external environment, a central fire is formed, the primary air and the gas required by the outer fire are input into the second gas mixing chamber 14 by the second injection pipe independently of the first injection pipe 4, and at the same time, the second gas mixing chamber 14 is separated from the first gas mixing chamber 13, thus realizing the fluid separation of the second gas mixing chamber 14 and the first gas mixing chamber 13, then, the fuel mixture can be supplied separately to allow the user to control the inflow of the fuel mixture into the first ejector pipe 4 and the second ejector pipe separately, if the size of the outer fire and the center fire is to be adjusted, the adjustment valve of the total intake pipe 70 connected to the first intake pipe 80 of the first ejector 31 and the second intake pipe 50 and the third intake pipe 60 communicating with the first ejector 32 and the second ejector 32 ', is adjusted, and in addition, since the first ejector 32 and the second ejector 32' and the second intake pipe 50 and the third intake pipe 60 are designed symmetrically with respect to the first ejector 31, the overall nozzle holder 3 is T-shaped, which facilitates the equalization of the injection pressure of each ejector.

Claims

1. A fire lid, fire lid (2) is including annular body, the inboard edge, the outside edge of the annular roof (20) of body respectively downwardly extending form inner ring wall (22) and outer lane wall (23), its characterized in that: the first fire hole (21) is formed in the inner ring wall (22), and a secondary air channel (5) which is communicated with the outside and a fire outlet area of the first fire hole (21) is formed by surrounding the inner ring wall (22).

2. An upper air inlet burner applying the fire cover of claim 1, comprising a mounting seat (40) and a gas mixing chamber (1) arranged on the mounting seat (40), wherein the gas mixing chamber (1) comprises an inner ring wall surface (11) and an outer ring wall surface (12) which are arranged in a ring shape and are concentrically arranged at intervals, and a bottom wall (13) connecting the inner ring wall surface (11) and the outer ring wall surface (12), the fire cover (2) covers the inner ring wall surface (11) and the outer ring wall surface (12), an inner ring wall (22) of the fire cover (2) is jointed with the inner ring wall surface (11) of the gas mixing chamber (1), and an outer ring wall (23) of the fire cover (2) is jointed with the outer ring wall surface (12) of the gas mixing chamber (1), and is characterized in that: also comprises

The nozzle seat (3) is positioned below the air mixing chamber (1);

a first ejector (31) provided at a central position of the nozzle holder (3) to protrude above the mount (40) above the nozzle holder (3);

the gas inlet end (41) of the first injection pipe (4) is opposite to the first ejector (31), and the gas outlet end (42) of the first injection pipe (4) is communicated with the gas mixing chamber (1);

the first fire holes (21) are at least two and are communicated with the gas mixing chamber (1), and are circumferentially arranged at the positions, adjacent to the inner ring wall surface (11) of the gas mixing chamber (1), of the fire cover inner ring wall (22) at intervals.

3. The upper intake burner of claim 2, wherein: also includes:

the separator (30) is arranged in the gas mixing chamber (1) and divides the gas mixing chamber (1) into a first gas mixing chamber (13) positioned at the inner side and a second gas mixing chamber (14) positioned at the outer side, and the first fire holes (21) are communicated with the first gas mixing chamber (13);

a second injector (32, 32') arranged above the nozzle holder (3) and projecting above the mounting (40), and spaced from the first injector (31);

the second injection pipe (6, 6 ') is independent of the first injection pipe (4) and is arranged in the gas mixing chamber (1), an air inlet (61) of the second injection pipe is opposite to the second ejector (32, 32 '), and an air outlet (62 ') of the second injection pipe is communicated with the second gas mixing chamber (14); and

and the second fire holes (24) are at least two and are communicated with the second gas mixing chamber (14) and are arranged on the outer ring wall (23) at intervals along the circumferential direction.

4. The upper intake burner of claim 2, wherein: the inner ring wall (22) is arranged above the first fire holes (21) and is also provided with at least two first flame stabilizing holes (221) arranged at intervals in a staggered manner with the first fire holes (21) along the circumferential direction, and the first flame stabilizing holes (221) are communicated with the first gas mixing chamber (13).

5. The upper intake burner of claim 4, wherein: the inner side edge of the annular top wall (20) of the fire cover (2) extends radially inwards towards the direction of an annular cavity (110) enclosed by the inner ring wall surface (11), and the blocking wall (201) forms a water blocking eave which is blocked above the first fire hole (21) and the first flame stabilizing hole (221).

6. The upper intake burner of claim 5, wherein: the retaining wall (201) is then extended downwards with a retaining edge (202) partially covering the first flame stabilizing hole (221).

7. The upper intake burner of claim 3, wherein: the inlet end (241) of second fire hole (24) is located the bottom of outer lane wall (23), the end (242) of giving vent to anger of second fire hole (24) be located outer lane wall (23), outer lane wall (23) in the end (242) below of giving vent to anger of second fire hole (24) has seted up first recess (231) circumferentially the bottom of outer lane wall (23) on still seted up with second steady flame hole (232) that first recess (231) are linked together.

8. The upper intake burner of claim 7, wherein: the first groove (231) is gradually inclined upwards from bottom to top and is intersected with the second fire hole (24).

9. The upper intake air burner according to any one of claims 2 to 8, wherein: the outer ring wall (23) extends outwards to form a protective umbrella which is shielded above the nozzle seat (3).

10. The upper intake burner of claim 9, wherein: the outer ring wall (23) extends gradually downwards from top to bottom towards the radial direction of the air mixing chamber (1).

11. The upper intake air burner according to any one of claims 3 to 8, wherein: the gas mixing chamber further comprises a primary air channel (7), wherein the primary air channel (7) is formed at a position, corresponding to the nozzle seat (3), on the outer ring wall surface (12) and is locally recessed inwards along the radial direction of the gas mixing chamber (1); the inward-concave part of the surface of the outer ring wall (23) is directly used as a separating part (230) for separating the primary air channel (7) and the secondary air channel (5), and an air inlet (61) of the second injection pipe and an air inlet (41) of the first injection pipe (4) are formed in the separating part (230).

12. The upper intake burner of claim 11, wherein: the first injection pipe (4) transversely penetrates through the annular cavity (110).

13. The upper intake burner of claim 11, wherein: at least one part of the bottom wall (13) of the air mixing chamber (1) is recessed to form a supporting leg (10) at other parts of the periphery of the primary air channel (7), the interval formed between the adjacent supporting legs (10) is communicated with the secondary air channel (5), and the secondary air channel (5) is mutually independent from the primary air channel (7).

14. The upper intake burner of claim 13, wherein: and cavities (81, 82) for accommodating the second injection pipe are formed in the supporting legs (10).

15. The upper intake burner of claim 14, wherein: and a pressure stabilizing piece (9) for stabilizing the gas in the gas mixing chamber (1) is arranged in the gas mixing chamber (1), and the pressure stabilizing piece (9) can partially extend into the concave cavities (81, 82).

16. The upper intake burner of claim 15, wherein: the pressure stabilizer (9) comprises a plate body (91), wherein the center of the plate body (91) is provided with a central hole (911) which is positioned at the periphery of the annular cavity (110), the hole wall of the central hole (911) protrudes upwards to form a circle of convex wall (9111), the convex wall (9111) partially forms one part of the separator (30), and the outer periphery of the plate body (91) extends in the horizontal direction along (910) and can partially cover the cavities (81, 82).

17. The upper intake burner of claim 16, wherein: the second injection pipe (6, 6') is formed by combining an upper pipe body (101) and a lower pipe body (102) which are adaptive in shape, wherein the lower pipe body (102) is formed by partially sinking the bottom of the supporting leg (10), and the upper pipe body (101) is formed by sinking the part, corresponding to the convex wall (9111), of the plate body (91) from bottom to top.

18. The upper intake burner of claim 16 or 17, wherein: the annular top wall (20) of the fire cover (2) extends from top to bottom to form an annular baffle (201) which is abutted against the convex wall (9111), and the annular baffle (201) is abutted against the convex wall (9111) and partially forms other parts of the separator (30).

19. Cooking hob with an upper inlet air burner according to any one of the claims 2 to 18, comprising a panel (401), characterized in that: the mounting seat (40) is a part of the panel (401).

20. Cooking hob with an upper inlet air burner according to any one of the claims 2 to 18, comprising a drip tray (400) located below the burner, characterized in that: the liquid containing tray (400) is used as the mounting seat (40).