CN111878812A - Fire cover, combustor and cooking utensils - Google Patents

Abstract

The invention discloses a fire cover, a burner and a cooker. The fire cover is provided with: a gas passage hole; a first ring fire chamber is arranged on the outer side of the gas passage hole; a second ring fire chamber is provided with on the outside of the first ring combustion chamber; and a split fire hole, which communicates with the gas through hole and the second ring fire chamber; or, the air inlet of the split fire hole is connected to the The first ring fire chamber is connected, and the air outlet of the split fire hole is arranged on the outer ring wall or the top ring wall of the second ring fire chamber; the split fire hole is in the circumferential direction of the fire cover A plurality of them are distributed in a ring shape. In this way, it is beneficial to improve the power and efficiency of the entire burner.

Description

Fire Covers, Burners and Cooktops

technical field

The invention relates to the technical field of gas cookers, in particular to a fire cover, a burner and a cooker.

Background technique

Traditionally, the air inlet burner usually includes components such as a base cup, an air distribution plate and a fire cover assembly, wherein the air distribution plate is provided between the bottom cup and the fire cover assembly for mixing the mixed gas flow flowing to the fire cover assembly.

Wherein, the fire cover assembly usually includes a plurality of fire covers, such as an inner ring fire cover and an outer ring fire cover, etc., each fire cover has an annular fire chamber and a fire hole communicated with the annular fire chamber. Specifically, the annular combustion chambers of each fire cover are relatively independent, and are controlled by relatively independent gas gas circuits; in this way, if the intake power of the ejector tube corresponding to the outer ring fire cover is too large, it will cause Too much mixed gas flow in the annular combustion chamber of the outer ring fire cover will cause the outer ring fire of the burner to be too large, which is not conducive to the improvement of the power and efficiency of the entire burner.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to propose a fire cover, which aims to solve the technical problem of how to improve the power and efficiency of the entire burner.

In order to achieve the above object, the present invention provides a fire cover for a burner. The fire cover has:

air through hole;

The first ring fire chamber is arranged on the outer side of the gas passage hole;

A second annular combustion chamber is disposed outside the first annular combustion chamber; and

A split fire hole, the split fire hole communicates with the gas passage hole and the second ring fire chamber; or, the air inlet of the split fire hole is communicated with the first ring fire chamber, and the The air outlet of the split fire holes is arranged on the outer ring wall or the top ring wall of the second ring fire cavity; the split fire holes are annularly distributed in the circumferential direction of the fire cover.

Optionally, the split fire holes are arranged obliquely.

Optionally, the fire cover includes an annular top plate, a first annular side plate disposed on the inner periphery of the annular top plate, an annular convex plate protruding from the lower surface of the annular top plate, and an annular top plate disposed on the annular top plate The second annular side plate of the outer peripheral edge of the second annular side plate, the first annular fire chamber is formed between the first annular side plate and the annular convex plate, and the second annular side plate and the annular convex plate are formed between the second annular side plate and the annular convex plate. forming the second ring fire cavity;

The air inlet of the split fire hole is arranged on the outer annular surface of the annular convex plate, and the air outlet of the split fire hole is arranged on the inner annular surface of the first annular side plate.

Optionally, the first annular side plate is inclined inward and downward, and/or the second annular side plate is inclined outward and downward.

Optionally, the fire cover further includes a first connecting ring protrusion disposed on the lower peripheral edge of the first annular side plate and extending downward, and the first connecting ring protrusion is used for connecting with the first ring of the bottom cup. The inner ring wall of the air cavity is a sealing fit connection; and/or,

The fire cover also includes a second connecting ring protrusion arranged on the lower peripheral edge of the second annular side plate and extending downward, the second connecting ring protrusion is used for connecting with the outer side of the second ring air cavity of the bottom cup. Ring wall seal fit connection.

Optionally, the thickness of the first connecting ring protrusion is smaller than the thickness of the first annular side plate, so as to form a first accommodating step on the inner side or the outer side of the first connecting ring protrusion; or,

The outer annular surface of the connection between the first annular side plate and the first connecting ring protrusion is provided with a limiting ring protrusion, so as to form a first accommodating step on the outer side of the first connecting ring protrusion; and/or,

The thickness of the second connecting ring protrusion is smaller than the thickness of the second annular side plate, so as to form a second accommodating step on the inner side or the outer side of the second connecting ring protrusion.

Optionally, the fire cover further includes a connecting plate arranged in the first connecting ring protrusion, two ends of the connecting plate are respectively connected to the inner annular surface of the first connecting ring protrusion, and the connecting plate is used for It is arranged above the main ejection tube of the bottom cup.

Optionally, the fire cover further has a first annular fire hole disposed inwardly on the first annular side plate, and the first annular fire hole communicates with the first annular fire cavity; and/or ,

The fire cover also has a second annular fire hole disposed outward on the second annular side plate, and the second annular fire hole communicates with the second annular fire cavity.

Optionally, when the split fire hole communicates with the gas passage hole and the second ring fire cavity, the air outlet of the split fire hole is arranged above the gas outlet of the first ring fire hole. .

Optionally, the inner annular surface of the first annular side plate is provided with an annular flame stabilization groove, and the lower side groove wall of the annular flame stabilization groove is provided with a third ring that communicates with the first annular combustion chamber. Fire hole.

Optionally, the third ring fire hole extends in an up-down direction.

Optionally, the outer annular surface of the first annular side plate is provided with an air inlet ring groove, and the upper side groove wall of the air inlet ring groove is correspondingly arranged with the lower side groove wall of the annular flame stabilization groove, and the The air inlet of the third ring fire hole is arranged on the upper side groove wall of the air inlet ring groove.

Optionally, the groove bottom wall of the air inlet ring groove is connected to the outer annular surface of the first annular side plate.

Optionally, the fire cover further has a third ring fire chamber disposed outside the second ring fire chamber.

The present invention also provides a burner comprising the base cup as described above.

The present invention also provides a cooker, including the above burner.

It can be understood that for the solution of "the split fire hole is connected to the gas through hole and the second ring fire cavity", the fire cover has a split fire hole, and the split fire hole is connected to the gas through hole and the second ring fire cavity. , the mixed gas flow in the second ring fire chamber can be split to the inside of the first ring fire chamber through the split fire holes, so as to form the first ring flame, which is beneficial to improve the inner ring flame (that is, the first ring flame). especially when the gas supply power of the ejector tube corresponding to the second ring fire chamber is too large, part of the mixed gas in the second ring fire chamber can be shunted to the first ring fire chamber through the split fire holes The inner side of the fire cavity is burned in the ring, which is beneficial to the improvement of the power and efficiency of the entire burner, and also can improve the uniformity of the temperature of the first ring flame and the second ring flame.

For the solution of "the air inlet of the split fire hole is communicated with the first ring fire chamber, and the air outlet of the split fire hole is set on the outer ring wall or the top ring wall of the second ring fire chamber", it is possible to make The mixed gas flow in the first ring fire chamber is branched to the outside or above of the second ring fire chamber through the split fire holes, so as to form the second ring flame, which is beneficial to improve the outer ring flame (that is, the second ring flame). ); especially when the gas supply power of the ejector tube corresponding to the first ring fire chamber is too large, part of the mixed gas in the first ring fire chamber can be shunted to the second ring through the split fire holes The outer or upper side of the combustion chamber is thus beneficial to the improvement of the power and efficiency of the entire burner, and the uniformity of the temperature of the first ring flame and the second ring flame can also be improved.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a burner of the present invention from a perspective;

FIG. 2 is a schematic structural diagram of the burner in FIG. 1 from another perspective;

3 is a cross-sectional view of the burner in FIG. 1 along a section line;

Fig. 4 is the partial enlarged view of A place in Fig. 3;

5 is a cross-sectional view of the burner of FIG. 1 along another section line;

FIG. 6 is a schematic structural diagram of the bottom cup in FIG. 3 from a viewing angle;

7 is a cross-sectional view of the bottom cup in FIG. 6 along a multi-segment section line;

Fig. 8 is the sectional view of the bottom cup in Fig. 6;

FIG. 9 is a schematic structural diagram of the bottom cup in FIG. 6 from another perspective;

Figure 10 is a schematic view of a cross-section of the bottom cup in Figure 6;

FIG. 11 is a schematic structural diagram of the fire cover in FIG. 3 from a viewing angle;

FIG. 12 is a schematic structural diagram of the fire cover in FIG. 11 from another perspective;

Figure 13 is a sectional view of the fire cover in Figure 12;

Fig. 14 is the partial structure schematic diagram of the fire cover in Fig. 13;

Figure 15 is a schematic view of a longitudinal section of the fire cover in Figure 11;

Figure 16 is a sectional view of the fire cover in Figure 11;

Figure 17 is a schematic structural view of the nozzle base in Figure 3 from a perspective; wherein, the nozzle is installed on the nozzle base;

FIG. 18 is a schematic structural diagram of the nozzle base in FIG. 3 from another perspective;

Figure 19 is a bottom view of the nozzle base in Figure 18;

FIG. 20 is a schematic cross-sectional structural diagram of the nozzle base in FIG. 18 .

Description of reference numbers:

100, burner; 10, bottom cup; 11, cup body; 111, first ring air chamber; 112, second ring air chamber; 113, central through hole; 114, partition plate; 1141, first partition plate; 1142, the second partition; 1143, the first connecting partition; 1144, the second connecting partition; 115, the first dividing plate; 116, the second dividing plate; 11a, the bottom plate; 11b, the first annular convex part; 11c , the second annular convex part; 11d, the third annular convex part; 11e, the annular inclined side plate; 12, the first ejection tube; 121, the third straight tube; 122, the third arc tube; 13, the main ejection Tube; 131, the first straight tube; 132, the first arc tube; 14, the booster ejection tube; 141, the second straight tube; 142, the second arc tube; 20, the fire cover; 21, the first ring Fire chamber; 22, first ring fire hole; 23, second ring fire chamber; 24, second ring fire hole; 25, gas through hole; 26, annular top plate; 27, first annular side plate; 27a 27b, the limit ring convex; 27c, the first accommodating step; 271, the annular flame stabilization groove; 272, the third ring fire hole; 273, the intake ring groove; 28, the annular convex plate; 29, the second annular side plate; 29a, the second connecting ring protrusion; 29b, the second accommodating step; 30, the nozzle; 40, the nozzle base; 41, the installation base plate; 411, the gas pipe fitting hole; part; 42, support column; 421, gas pipe assembly channel; 422, nozzle installation hole; 423, avoid cut surface; 424, windward side; 50, split fire hole; 60, connecting plate.

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for description purposes, and should not be understood as instructions or Implicit their relative importance or implicitly indicate the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature.

In addition, the meaning of "and/or" in the whole text is to include three parallel schemes. Taking "A and/or B" as an example, it includes scheme A, scheme B, or scheme that A and B satisfy at the same time.

The present invention provides a bottom cup and a burner, wherein the bottom cup is used for the burner, and the burner is an upper air intake burner.

Specifically, as shown in FIGS. 1-5, the burner 100 includes a panel (not shown), a bottom cup 10, a fire cover 20, a nozzle 30, a nozzle base 40, etc. The bottom cup 10, fire cover 20 and The nozzles 30 are mounted above the panel and will be described below.

In an embodiment of the present invention, as shown in FIGS. 2-10 , the bottom cup 10 includes:

The cup body 11 has a first annular air cavity 111 (ie, the first annular air intake air cavity, referred to as the first annular air cavity 111 for short, the same below), and a second annular air cavity 111 located outside the first annular air cavity 111. The second ring air cavity 112; and

The first ejection tube 12 and the second ejection tube, the first ejection tube 12 and the second ejection tube are both arranged at the bottom of the cup body 11 , the first ejection tube 12 and the first ring The air cavity 111 is in communication, and the second ejection tube is in communication with the second annular air cavity 112 .

Specifically, the second annular air cavity 112 and the first annular air cavity 111 are spaced from the inside to the outside along the radial direction.

Specifically, the air outlet of the first ejection tube 12 communicates with the first annular air cavity 111 , and the air outlet of the second ejection tube communicates with the second annular air cavity 112 .

It should be pointed out that, in the present invention, the cup body 11 can also have more annular air intake air cavities and ejector tubes arranged opposite to the air intake air cavities. The third ring air chamber on the outside of the second ring air chamber 112, the bottom cup 10 further includes a third ejector tube disposed at the bottom of the cup body 11 and communicating with the third ring air chamber; There is a fourth annular air cavity arranged inside the first annular air cavity 111 , and the bottom cup 10 also includes a fourth ejection tube arranged at the bottom of the cup body 11 and communicated with the fourth annular air cavity; The cup body 11 also has a fifth annular air cavity disposed between the first annular air cavity 111 and the second annular air cavity 112 , and the bottom cup 10 further includes a fifth annular air cavity disposed at the bottom of the cup body 11 and connected to the fifth annular air cavity 112 . a fifth ejector tube in communication with the cavity; and so on.

Moreover, it should also be pointed out that the above-mentioned third annular air cavity, fourth ejector tube and fifth annular air cavity can be provided independently or simultaneously.

Moreover, it should also be pointed out that when the cup body 11 has more annular air inlet air cavities, the first annular air cavity 111 and the second annular air cavity 112 may be arranged adjacently or non-adjacently. In order to facilitate the explanation of the present invention, in the following description, if the cup body 11 has more annular air inlet air cavities, the first annular air cavity 111 and the second annular air cavity 112 are arranged adjacent to each other as an example for description. However, this is not intended to limit the present invention.

In the following examples of the present invention, in order to facilitate the explanation of the present invention, the cup body 11 only has the first annular air cavity 111 and the second annular air cavity 112 as an example for description, but this is not intended to limit the invention; Moreover, when the cup body 11 has more annular air intake air cavities, the corresponding structure can be set adaptively, which will be briefly described below.

Specifically, a nozzle 30 is correspondingly provided at the air inlet of each ejection tube to supply air to each ejection tube respectively, so that the air supply air paths corresponding to each combustion chamber of the burner 100 are opposite to each other. Independent, for example, the on-off can be controlled separately, and the gas supply power can be adjusted separately.

Specifically, the nozzles 30 are provided with a plurality of nozzles, and the air inlet of each ejection tube is provided with a nozzle 30 correspondingly, and the nozzles 30 are arranged opposite to the air inlet of the ejection tube corresponding to the nozzle 30 . The gas ejected from the nozzle 30 attracts the air on the peripheral side (ie, the primary air) and enters the corresponding ejection pipe together to form a mixed gas flow.

In this way, a mixed gas flow of air and gas can be provided into different annular intake air cavities through different ejection tubes respectively, so that it is convenient to control each gas path individually. Specifically, the mixed gas flow can be provided to the first annulus 111 through the air inlet of the first ejector pipe 12, and the mixed gas flow can be provided to the second annulus 112 through the air inlet of the second ejector gas flow.

After the mixed gas flow enters each annular intake air cavity, it can flow along its circumferential direction.

Further, as shown in FIGS. 2-10 , the first ejection tube 12 and the second ejection tube are both integrally connected to the bottom of the cup body 11 . In this way, the assembly steps of the first ejection tube 12 and the second ejection tube and the cup body 11 can be reduced, so that the assembly process of the burner 100 can be simplified.

Specifically, when more ejector tubes need to be provided, all ejector tubes can be integrated with the cup body 11; however, it should be noted that if the burner 100 has a unique design and individual special requirements , a special ejection tube can also be provided to be detachably connected with the cup body 11 .

Further, as shown in FIGS. 2-10 , the bottom cup 10 (specifically, the cup body 11 ) is used for mating connection with the fire cover 20 , so that the first annular air cavity 111 is used for connecting with the first ring air cavity 111 of the fire cover 20 . A ring fire chamber 21 communicates with each other, and the second ring air chamber 112 is used for communication with the second ring fire chamber 23 of the fire cover 20 .

Specifically, in the present invention, the fire cover 20 has a first annular fire cavity 21 (ie, the first annular fire cavity, abbreviated as the first annular fire cavity 21 , the same below) and a second annular fire cavity twenty three.

When the base cup 10 is applied to the burner 100 , the base cup 10 is connected with the fire cover 20 , the first annular air cavity 111 is communicated with the first annular combustion cavity 21 , and the second annular air cavity 112 It communicates with the second ring combustion chamber 23 . Specifically, the annular air intake air chambers of the cup body 11 are all open at the upper end, and the annular combustion chambers of the fire cover 20 are open at the lower end, so as to make the corresponding annular air intake air chambers and the annular combustion chamber open. The fire chamber is connected.

Specifically, as shown in FIGS. 2-10 , the fire cover 20 further has a first ring fire hole 22 and a second ring fire hole 24 , the first ring fire hole 22 and the first ring fire cavity 21 The first ring fire holes 22 are distributed in a plurality of rings, and the mixed gas flow entering the first ring fire cavity 21 is ejected from the first ring fire holes 22 to form a first ring flame; The second ring fire cavity 23 is connected, and the second ring fire holes 24 are distributed in a plurality of rings, and the mixed gas flow entering the second ring fire cavity 23 is sprayed from the second ring fire holes 24 out to form a second ring of flames.

It should be pointed out that when the cup body 11 has more annular air intake air chambers, the fire cover 20 should be provided with more annular combustion chambers, and each annular combustion chamber is provided with a corresponding fire hole.

In this way, the bottom cup 10 is directly matched and connected with the fire cover 20, so that each corresponding annular air intake air chamber is communicated with the annular fire chamber. That is to say, the burner 100 of the present invention does not need to be provided with a gas distribution plate. The structure of the burner 100 can be simplified, and the assembly steps of the gas distribution plate, the bottom cup 10 and the fire cover 20 can be reduced, so that the assembly process of the burner 100 can be simplified and the production cost can be reduced.

In this embodiment, the second annular fire holes 24 are provided with at least two rows.

Specifically, in the present invention, by connecting the first ejection tube 12 and the second ejection tube to the bottom of the cup body 11 integrally, the number of the first ejection tube 12 and the second ejection tube, and the cup body can be reduced. 11, so that the assembling process of the burner 100 can be simplified. Moreover, in the present invention, there is no need to provide a gas distribution plate, or in other words, the air distribution plate is integrally formed in the bottom cup 10, and the bottom cup 10 is directly connected with the fire cover 20, which can simplify the structure of the burner 100; The assembly steps of the gas distribution pan, the base cup 10 and the fire cover 20 are reduced, so that the assembly process of the burner 100 can be further simplified, so as to reduce the production cost.

In a specific embodiment, the fire cover 20 can either be an integrally formed structure, or can be divided into a plurality of cover bodies, each cover body having at least one annular fire chamber.

In this embodiment, the fire cover 20 is an integrally formed structure. In this way, by making the fire cover 20 an integral molding structure, the fire cover 20 can be installed on the bottom cup 10 at one time, thereby simplifying the structure of the burner 100 and simplifying the assembly process of the burner 100 . Moreover, by setting the fire cover 20 as an integral molding structure, the diameter or equivalent diameter of the air passage hole 25 in the middle of the fire cover 20 can be increased, thereby expanding the air supply area of the secondary air passage.

Specifically, the cup body 11 usually also has a central through hole 113 located inside the first annular air cavity 111 , and the fire cover 20 also has an air through hole 25 located inside the first annular combustion cavity 21 . The through-air through holes 25 are arranged corresponding to the central through-hole 113 to form a secondary air channel. In this way, the outside air can enter the center through hole 113 from the bottom of the cup body 11 (and above the panel), and move to the fire cover 20 through the center through hole 113 and the air through hole 25 in turn, so that the fire cover 20 can reach the fire cover 20 through the center The inner side is supplemented with air, so that the gas inside the fire cover 20 can be fully burned.

Further, as shown in FIGS. 2-10 , there are multiple second ejection tubes (ie, more than or equal to two, the same below). Specifically, the air outlets of the plurality of second ejection tubes are arranged at intervals in the circumferential direction of the second annular air cavity 112 .

In this way, by providing a plurality of second ejection tubes and arranging the gas outlets of the plurality of second ejection tubes at intervals in the circumferential direction of the second annular air cavity 112, the mixing in the plurality of second ejection tubes can be achieved. The gas flow enters the second annulus cavity 112 from different circumferential positions of the second annulus cavity 112, so that the mixed gas flow entering the second annulus cavity 112 can form a pressurization acceleration effect, thereby improving the second annulus cavity 112. The uniformity of the distribution of the mixed gas flow in the annular cavity 112 makes the distribution of the mixed gas flow in the second annular cavity 112 uniform or relatively uniform, thereby improving the uniform distribution of the second annular flame corresponding to the burner 100 in the circumferential direction so that the power of the second ring flame can also be increased.

Specifically, as shown in FIGS. 2-10 , the second ejection tube includes a main ejection tube 13 and a pressurized ejection tube 14 . In this embodiment, there are two second ejection tubes, which are the main ejection tube 13 and the booster ejection tube 14 respectively, so as to simplify the structure of the bottom cup 10 . Of course, in other embodiments, according to the diameter/equivalent diameter of the second annular air cavity 112, the diameter/equivalent diameter of the second ejection tube, etc. The number is set to be more, for example, the number of second ejection tubes can be set to 3, 4, 5, or 6, etc., and the air outlets of each second ejection tube are evenly distributed in the circumferential direction or approximately Evenly distributed.

Further, as shown in FIGS. 2-10 , the main ejection tube 13 is arranged below the central through hole 113 of the cup body 11 , and the booster ejection tube 14 is arranged on one side of the main ejection tube 13 . The first ejection tube 12 is disposed on the other side of the main ejection tube 13 .

It can be understood that, compared with another design solution of the present invention, the first ejection tube 12 is arranged between the main ejection tube 13 and the booster ejection tube 14, and is arranged below the central through hole 113 of the cup body 11 ” (this is not to deny the design, just to better reflect the advantage of “the main ejection pipe 13 is below the central through hole 113”), the main ejection pipe 13 is arranged below the central through hole 113, and the The booster ejection tube 14 and the first ejection tube 12 are respectively arranged on both sides of the main ejection tube 13, on the one hand, the gas outlet end of the main ejection tube 13 can be extended to the second annular gas through the lower part of the central through hole 113 Below the cavity 112, in order to increase the length of the main ejection tube 13 and improve the ejection capability of the main ejection tube 13; The gas outlet ends of the ejector tubes 14 are designed to prevent them from interfering with each other. In addition, it is also beneficial to increase the effective length of the first ejection tube 12 . In addition, it is also convenient to design the main ejection tube 13 to be thicker, so as to enhance its ejection capability.

Further, as shown in FIGS. 2-10 , the cross-sectional area of the main ejection tube 13 is larger than the cross-sectional area of the booster ejection tube 14 .

In this way, by making the main ejection pipe 13 thicker, the ejection capability of the main ejection pipe 13 can be enhanced; moreover, the main ejection pipe 13 can also be the main air intake pipe of the second annular air cavity 112, and the pressure is increased. The ejector pipe 14 is an auxiliary air intake pipe, and the mixed gas flow entering the second annulus 112 from the booster ejector 14 is used to pressurize and accelerate the mixed gas flow entering the second annulus 112 from the main ejector 13 .

Further, as shown in FIGS. 2-10 , the air inlet of the first ejection tube 12 and the air inlet of the second ejection tube are both located on the same side of the cup body 11 .

In this way, on the one hand, it is convenient to supply air to the burner 100, and on the other hand, it can avoid the phenomenon of air grabbing between the primary air and the secondary air. The air on the side opposite to the side where the port is located) enters the secondary air passage. In addition, it is also convenient to increase the effective length of the first ejection tube 12 and the second ejection tube, thereby enhancing their ejection capability.

Further, as shown in FIGS. 2-10 , the bottom of the cup body 11 is provided with a part on the side where the air inlet of the first ejection tube 12 and the air inlet of the second ejection tube are located. The partition plate 114 , and the air inlet of the first ejection tube 12 and the air inlet of the second ejection tube are both disposed on the side of the partition plate 114 away from the central through hole 113 .

Specifically, the partition plate 114 is integrally connected to the outer surfaces of the first ejection tube 12 and the second ejection tube, in other words, the first ejection tube 12 and the second ejection tube are both penetrated on the partition plate 114 .

In this way, the primary air and the secondary air can be separated by the partition plate 114, so that the phenomenon of air grabbing can be further avoided.

Further, as shown in FIGS. 2-10 , the side of the partition plate 114 away from the central through hole 113 is protruded with a first distribution plate 115 , and the first distribution plate 115 is arranged on the side of the first ejection tube 12 between the air inlet and the air inlet of the second ejection pipe.

Specifically, when there are multiple second ejection tubes, the first dividing plate 115 is provided at the air inlet of the first ejection tube 12 and the second ejection tube adjacent to the first ejection tube 12 If there is a second ejection tube on both sides of the first ejection tube 12, the first diverter plate 115 is provided with two correspondingly, and they are respectively located in the first ejection tube 12 Both sides of the air intake.

In this way, the air entering the first ejection pipe 12 and the air entering the second ejecting pipe can be separated by the first dividing plate 115, so that the primary air entering the first ejecting pipe 12 and the air entering the second ejecting pipe can be avoided. The primary air of the ejector tube has a phenomenon of air grabbing.

It can be understood that if there are multiple second ejection tubes and there are adjacent second ejection tubes, the side of the partition plate 114 away from the central through hole 113 can be protruded with a second distribution plate 116, and set the second dividing plate 116 between the air inlets of the two adjacent second ejection tubes, so that the primary air entering the adjacent two second ejection tubes can be avoided. A rush occurs.

In this embodiment, as shown in FIGS. 2 , 9 and 10 , the first dividing plate 115 is provided between the air inlet of the first ejection pipe 12 and the air inlet of the main ejection pipe 13 . The second dividing plate 116 is provided between the air inlet of the supercharging ejection pipe 14 and the air inlet of the main ejection pipe 13 .

Of course, in other embodiments, the first distribution plate 115 and the second distribution plate 116 may also be disposed on the nozzle base 40 , which will be described in detail below.

Further, as shown in FIGS. 2 , 9 and 10 , the air inlet of the first ejection pipe 12 is provided on the side of the partition plate 114 away from the central through hole 113 , and/or the second ejection The air inlet of the pipe is provided on the side of the partition plate 114 away from the central through hole 113 . In this way, the manufacturing difficulty of the bottom cup 10 can be reduced.

Further, as shown in FIGS. 2 , 9 and 10 , the partition plate 114 includes a first partition plate 1141 perpendicular to the intake end of the first ejection tube 12 , and the second ejection tube 1141 . The second partition plate 1142 is vertically arranged at the intake end of the first partition plate 1142 , and the first connecting partition plate 1143 connects the first partition plate 1141 and the second partition plate 1142 .

Specifically, when there are multiple second ejection tubes, there are multiple second partitions 1142 correspondingly, and the first connecting partitions 1143 are connected to the second ejection tubes adjacent to the first ejection tubes 12 . The corresponding second separator 1142 .

If there are adjacent second ejection tubes, the partition plate 114 may further include a second connection partition plate 1144, and the second connection partition plate 1144 connects the adjacent two second ejection tubes respectively. The corresponding two second separators 1142 .

In this embodiment, as shown in FIGS. 2 , 9 and 10 , the main ejection tube 13 is provided with a second partition 1142 , and the booster ejection tube 14 is provided with a second partition 1142 . Two connecting partitions 1144 connect the two second partitions 1142 ; a first partition 1141 is provided outside the first ejection tube 12 , and the first connecting partition 1143 connects the first partition 1141 and the main ejection tube 13 The outer second partition 1142.

In this way, the structure of the partition plate 114 can be adapted to the arrangement of the respective ejection tubes.

In this embodiment, further, as shown in FIGS. 2 , 9 and 10 , the first partition 1141 extends to the edge of the cup body 11 , and/or the second partition outside the booster ejection tube 14 The partition 1142 extends to the edge of the cup body 11 . In this way, the space below the cup body 11 can be divided into two parts by the partition plate 114, so as to form the air supply areas for the primary air and the secondary air respectively.

In this embodiment, further, as shown in FIGS. 2 , 9 and 10 , the first distribution plate 115 is provided at the connection between the first connecting baffle 1143 and the second baffle 1142 outside the main ejection pipe 13 . , the second dividing plate 116 is arranged at the connection between the second connecting baffle 1144 and the second baffle 1142 outside the main ejection pipe 13 .

Further, as shown in FIGS. 2-10 , the cup body 11 includes a bottom plate 11 a with a central through hole 113 , and a first plate 11 a which is arranged on the upper surface of the bottom plate 11 a and is spaced from the inside to the outside along the radial direction. The annular convex portion 11b, the second annular convex portion 11c and the third annular convex portion 11d, the first annular air cavity 111 is formed between the first annular convex portion 11b and the second annular convex portion 11c, so The second annular air cavity 112 is formed between the second annular convex portion 11c and the third annular convex portion 11d.

Specifically, as shown in FIGS. 2-10 , the first annular convex portion 11b is the inner annular wall of the first annular air cavity 111 ; the second annular convex portion 11c is both the outer annular wall of the first annular air cavity 111 , is the inner ring wall of the second annular air cavity 112; the third annular convex portion 11d is the outer annular wall of the second annular air cavity 112; the bottom plate 11a located between the first annular convex portion 11b and the second annular convex portion 11c Part of the bottom wall of the first annular air cavity 111 is formed, and the bottom plate 11 a between the second annular convex portion 11 c and the third annular convex portion 11 d partially forms the bottom wall of the second annular air cavity 112 .

Specifically, as shown in FIGS. 2-10 , the first ejection tube 12 and the second ejection tube are arranged at the bottom of the bottom plate 11a.

In this way, the structure of the body of the bottom cup 10 can be simplified, and the formation of the first annular air cavity 111 and the second annular air cavity 112 can be simplified.

Further, as shown in FIGS. 2-10 , the cup body 11 further includes an annular inclined side plate 11e connected to the peripheral edge of the bottom plate 11a and extending obliquely downward. In this way, the overflowing soup can be made to flow down to the panel along the inclined annular inclined side plate 11e, and it is difficult to enter the inside of the burner 100 .

In this embodiment, the first partition plate 1141 extends to the edge/periphery of the annular inclined side plate 11e, and the second partition plate 1142 outside the booster ejection pipe 14 extends to the edge/periphery of the annular inclined side plate 11e perimeter.

Specifically, the edge/periphery of the annular inclined side plate 11e is provided with a downward flange.

Further, as shown in FIGS. 2-10 , the main ejection pipe 13 includes a first straight pipe 131 having an air inlet, and a first arc-shaped pipe 132 connected to the first straight pipe 131 . The arc-shaped pipe 132 has an air outlet, and the first arc-shaped pipe 132 communicates with the second annular air cavity 112 .

In this way, by making the main ejection tube 13 include the first straight tube 131 and the first arc-shaped tube 132, the communication between the main ejection tube 13 and the second annular air cavity 112 can be facilitated; The mixed gas flow entering the second annular air cavity 112 through the main ejection pipe 13 can be guided by the first arc-shaped pipe 132 to flow in the circumferential direction in the second annular air cavity 112, so as to facilitate the lifting The uniformity of the mixed gas flow in the second annulus 112 in the circumferential direction.

Specifically, as shown in FIGS. 2-10 , the first arc-shaped tube 132 is disposed below the first annular air cavity 111 and the second annular air cavity 112 .

Further, as shown in FIGS. 2-10 , the bottom wall of the second air ring cavity 112 is concave downward at the place where the main ejection pipe 13 communicates with the second air ring cavity 112 to form the first air ring cavity 112 . Arc tube 132 .

Specifically, the bottom wall of the second annular air cavity 112 is concave downward at the connection between the main ejection tube 13 and the second annular air cavity 112 , so as to form part of the lower tube wall of the first arc-shaped tube 132 .

In other words, the bottom wall of the second annular air cavity 112 is missing at the connection between the first arc-shaped tube 132 and the bottom wall of the second annular air cavity 112, so that the first arc-shaped tube 132 and the bottom wall of the second annular air cavity 112 are missing. The second ring air cavity 112 communicates with each other.

In this way, the processing of the first arc-shaped tube 132 can be facilitated.

Specifically, as shown in FIGS. 2-10 , the bottom wall portion of the second annular air cavity 112 located in the air outlet direction of the first arc-shaped pipe 132 is inclined downward.

Further, as shown in FIGS. 2-10 , the booster ejection pipe 14 includes a second straight pipe 141 having an air inlet, and a second arc-shaped pipe 142 connected to the second straight pipe 141 , so The second arc-shaped pipe 142 has an air outlet, and the second arc-shaped pipe 142 communicates with the second annular air cavity 112 .

Further, as shown in FIGS. 2-10 , the overall extension direction of the first arc-shaped tube 132 is the same as the overall extension direction of the second arc-shaped tube 142 . For example, if the first arc-shaped pipe 132 extends clockwise, the second arc-shaped pipe 142 also extends clockwise; if the first arc-shaped pipe 132 extends counterclockwise, the second arc-shaped pipe 142 also extends clockwise. 142 also extends counterclockwise.

In this way, the guiding direction of the second arc-shaped pipe 142 for the mixed gas flow entering the second annulus cavity 112 can be the same as the guiding direction of the first arc-shaped pipe 132 for the mixed gas flow entering the second annular air cavity 112 , so as to have the supercharging acceleration effect.

Further, as shown in FIGS. 2-10 , the pressurized ejection pipe 14 is located below the second annular air cavity 112 so as to facilitate the casting of the bottom cup 10 .

Further, as shown in FIGS. 2-10 , the bottom wall of the second annular air cavity 112 is provided with a first notch (not shown) at the position corresponding to the booster ejection tube 14 , and the booster ejection tube 14 set below the first gap.

As shown in FIGS. 2-10 , the outer surface of the tube wall of the booster ejection pipe 14 is protruded with a connecting surrounding wall connected to the periphery of the first notch. An arc-shaped groove (not shown) that communicates with the first gap is formed between the pipe walls.

The upper wall of the second arc-shaped tube 142 is provided with a second gap (not shown) communicating with the arc-shaped groove, so that the second arc-shaped tube 142 communicates with the second annular air cavity 112 .

In this way, on the one hand, it is convenient to guide the mixed gas flow into the second annular air cavity 112 , and on the other hand, it is also convenient to cast the bottom cup 10 .

Further, as shown in FIGS. 2-10 , the upper tube wall of the second arc-shaped tube 142 is missing to form a second gap. In this way, the intake area of the second arc-shaped pipe 142 communicating with the second annular air cavity 112 can be increased, and the guiding effect can be improved, so as to improve the supercharging acceleration effect.

Further, as shown in FIGS. 2-10 , the radian of the second annular air cavity 112 located between the gas outlet end of the main ejection tube 13 and the gas outlet end of the booster ejection tube 14 is less than π.

It can be understood that, in the air supply direction of the main ejection pipe 13, the farther from the air outlet of the main ejection pipe 13, the smaller the flow velocity of the mixed gas flow is. The radian of the second annular air cavity 112 between the gas outlet ends of the booster ejector tubes 14 is less than π, which can facilitate the enhancement of the booster acceleration effect of the booster ejector tubes 14 .

Specifically, the radian of the second annular air cavity 112 located between the gas outlet end of the main ejection tube 13 and the gas outlet end of the booster ejection tube 14 is less than or equal to π/2, such as 2π/ 5, π/3, 2π/7, π/4, π/5, or π/6, etc.

In this way, the mixed gas flow sent by the booster ejection pipe 14 can be boosted and accelerated to the mixed gas flow sent by the main ejection pipe 13 , thereby improving the distribution of the mixed gas flow in the second annular air cavity 112 The uniformity of the gas flow in the second ring gas chamber 112 can be uniform or relatively uniform, so that the uniformity of the flame distribution in the circumferential direction of the second ring flame corresponding to the burner 100 can be improved, and the second ring flame can also be increased. flame power.

Specifically, as shown in FIGS. 2-10 , the bottom wall portion of the second annular air cavity 112 located in the air outlet direction of the second arc-shaped pipe 142 is inclined downward.

Further, as shown in FIGS. 2-10 , the first straight pipe 131 and the second straight pipe 141 are arranged at an acute angle. In this way, the guiding and accelerating effect of the booster ejection pipe 14 on the mixed gas flow sent into the second annular air cavity 112 can be improved. Furthermore, the effective length of the first supercharging ejection tube 14 can also be increased.

Further, as shown in FIGS. 2-10 , the first ejection pipe 12 includes a third straight pipe 121 having an air inlet, and a third arc-shaped pipe 122 connected to the third straight pipe 121 . The three arc-shaped pipes 122 have an air outlet, and the third arc-shaped pipes 122 communicate with the first annular air cavity 111 .

In this way, by making the first ejection tube 12 include the third straight tube 121 and the third arc-shaped tube 122, the communication between the first ejection tube 12 and the first annular air cavity 111 can be facilitated; moreover, by arranging the third arc-shaped tube 122, so that the mixed gas flow entering the first annular air cavity 111 through the first ejection pipe 12 can be guided by the third arc-shaped pipe 122 to facilitate the flow in the circumferential direction in the first annular air cavity 111, In order to improve the uniformity of the mixed gas flow in the first ring air cavity 111 in the circumferential direction.

Further, as shown in FIGS. 2-10 , the overall extension direction of the third arc-shaped tube 122 is opposite to the overall extension direction of the first arc-shaped tube 132 . In this way, the effective length of the first ejection tube 12 can be easily increased, and the ejection effect and the diversion effect can be enhanced.

Further, as shown in FIGS. 2-10 , the first straight pipe 131 and the third straight pipe 121 are arranged at an acute angle. In this way, the guiding and accelerating effect of the first ejection pipe 12 on the mixed gas flow sent into the first annular gas cavity 111 can be improved, so as to improve the uniformity of the mixed gas flow in the first annular gas cavity 111 in the circumferential direction. Furthermore, the effective length of the first ejection tube 12 can also be increased.

Further, as shown in FIGS. 2-10 , the first ejection tube 12 is arranged below the first annular air cavity 111 and the second annular air cavity 112 .

Further, as shown in FIG. 2-10 , the bottom wall of the first annular air cavity 111 is provided with a third notch (not marked) at the position corresponding to the first ejection tube 12 , and the first ejection tube 12 It is arranged below the third gap; the outer surface of the tube wall of the first ejection tube 12 is protruded with a connecting wall connected to the periphery of the third gap, and the connecting wall is connected to the first ejection tube 12. An arc-shaped groove (not marked in the figure) that communicates with the third gap is formed between the tube walls; the upper tube wall of the third arc-shaped tube 122 is provided with a fourth gap (not marked in the figure) that communicates with the arc-shaped groove. ), so that the third arc-shaped tube 122 communicates with the first annular air cavity 111 .

In this way, on the one hand, it is convenient to guide the mixed gas flow into the first annular air cavity 111 , and on the other hand, it is also convenient to cast the bottom cup 10 .

Further, as shown in FIGS. 2-10 , the upper tube wall of the third arc-shaped tube 122 is missing to form a fourth gap. In this way, the intake area of the third arc-shaped pipe 122 communicating with the first annular air cavity 111 can be increased.

Further, as shown in FIGS. 2-10 , the main ejection tube 13 is located just below the central through hole 113 .

In this way, it is convenient to increase the effective length of the main ejection tube 13, thereby enhancing its ejection capability, prolonging the mixing time and path of gas and air, and improving the mixing effect, thereby making the second ring flame more powerful and efficient.

Further, as shown in FIGS. 2-10 , the first ejection tube 12 and the second ejection tube are located at the same level.

Specifically, the same level can be understood as: the center line of the first ejection tube 12 and the center line of the second ejection tube are located on the same horizontal plane or are arranged close to the same horizontal plane.

In this way, the overall thickness of the bottom cup 10 can be reduced, so that the burner 100 can be thinner.

Further, the bottom cup 10 is integrally formed by a gravity casting process. It can be seen from the above description that the structure of the bottom cup 10 is relatively complex, and the bottom cup 10 can be integrally casted through the gravity casting process, which can reduce the difficulty of manufacturing the bottom cup 10, thereby enabling mass production and reducing production costs.

Further, as shown in FIGS. 1 , 3-5 , and 11-16 , the first annular fire hole 22 is disposed inward, and/or the second annular fire hole 24 is disposed outward.

In this embodiment, the first annular fire hole 22 is disposed inward. Wherein, the arrangement of the first ring fire hole 22 inward means that the air outlet of the first ring fire hole 22 faces the inner side of the first ring fire chamber 21 , and includes the inner side of the first ring fire chamber 21 inclined upward. .

In this way, when the mixed gas flow in the first ring fire chamber 21 is sprayed from the first ring fire hole 22 , it is sprayed to the inside of the first ring fire chamber 21 , so that the first ring flame can be close to the center of the fire cover 20 The setting (that is, the diameter of the first ring flame can be reduced) can facilitate the increase of the flame temperature at the center of the fire cover 20 , in other words, the diameter of the gas through hole 25 can be increased.

In this embodiment, the second annular fire hole 24 is disposed outward. The arrangement of the second annular fire hole 24 facing outward means that the air outlet of the second annular fire hole 24 faces the outside of the second annular fire cavity 23 , and includes an upwardly inclined toward the outside of the second annular fire cavity 23 . .

In this way, when the mixed gas flow in the second ring fire chamber 23 is sprayed from the second ring fire hole 24, it is sprayed to the outside of the second ring fire chamber 23, so that the diameter of the second ring flame can be increased, so that the It is convenient to increase the flame temperature on the peripheral side of the fire cover 20, in other words, it can help to reduce the diameter of the second ring fire chamber 23, which can help to reduce the diameter of the fire cover 20, so as to facilitate the realization of miniaturized design .

Of course, in other embodiments, the first ring fire hole 22 can also be disposed upward (that is, the air outlet of the first ring fire hole 22 faces the top of the first ring fire cavity 21 ), and/or the second ring fire hole 22 The fire holes 24 are arranged upward (that is, the air outlet of the second ring fire holes 24 is facing the upper part of the second ring fire chamber 23); for example, the first ring fire holes 22 are arranged upward, and the second ring fire holes 24 are arranged outward , or the first ring fire hole 22 is arranged inwardly, and the second ring fire hole 24 is arranged upwardly, and so on.

Further, as shown in FIGS. 1 , 3-5 and 11-16 , the first ring fire hole 22 is also disposed inclined upward, so that the air outlet of the first ring fire hole 22 is inclined upward and faces the first ring fire hole 22 . and/or, the second annular fire hole 24 is also disposed inclined upward, so that the second annular fire hole 24 is inclined upward toward the outside of the second annular fire cavity 23 .

In this embodiment, as shown in FIGS. 1 , 3-5 , and 11-16 , the first annular fire hole 22 is further inclined upward, so that the mixed gas flow in the first annular fire cavity 21 can be burned When sprayed from the first ring fire hole 22 , it is sprayed to the inside of the first ring fire chamber 21 with an upward slope.

As shown in Figs. 1, 3-5, and 11-16, the second annular fire hole 24 is also inclined upward, so that the mixed gas flow in the second annular fire cavity 23 can flow from the second annular fire hole When the 24 is sprayed, it is sprayed to the outside of the second ring combustion chamber 23 inclined upward.

Further, as shown in Figures 1, 3-5, and 11-16, the fire cover 20 includes an annular top plate 26, a first annular side plate 27 disposed on the inner periphery of the annular top plate 26, and a first annular side plate 27 protruding from the annular top plate The annular convex plate 28 on the lower surface of 26, the first annular side plate 27 extends downward, and a first annular combustion chamber 21 is formed between the first annular side plate 27 and the annular convex plate 28, and the first annular fire chamber 21 is formed between the first annular side plate 27 and the annular convex plate 28. The annular fire hole 22 is provided on the first annular side plate 27 . In this way, the formation of the first ring fire chamber 21 can be simplified, so that the structure of the fire cover 20 can be simplified.

Further, as shown in FIGS. 1, 3-5, and 11-16, the fire cover 20 further includes a second annular side plate 29 disposed on the outer periphery of the annular top plate 26, the second annular side plate 29 facing the Extending downward, a second annular fire cavity 23 is formed between the second annular side plate 29 and the annular convex plate 28 , and the second annular fire hole 24 is provided on the second annular side plate 29 . In this way, the formation of the second ring fire chamber 23 can be simplified, so that the structure of the fire cover 20 can be simplified.

Further, as shown in Figures 1, 3-5, and 11-16, the first annular side plate 27 is disposed inward and inclined downward, so that on the one hand, the first annular fire chamber 21 can be increased in size. On the other hand, it is convenient to set the first annular fire hole 22, so that the first annular fire hole 22 can be inclined inwardly and upwardly.

Further, as shown in FIGS. 1 , 3-5 , and 11-16 , the included angle A between the center line of the first annular fire hole 22 and the horizontal plane is less than or equal to 50 degrees. In this way, the mixed gas flow jetted from the first annular fire hole 22 can be easily jetted toward the center of the fire cover 20 .

It can be understood that the above structure of the fire cover 20 can make the flame of the first ring burn more fully, and the situation of blocking the fire hole 22 of the first ring will not occur. Moreover, the first annular fire hole 22 is inclined inwardly and upwardly, so that the temperature distribution of the bottom of the pot can be more uniform when the pot is placed, and the user experience can be improved.

Specifically, the upper peripheral edge of the first annular side plate 27 is disposed close to the upper peripheral edge of the annular convex plate 28 , so that the diameter or equivalent diameter of the air passage hole 25 can be increased.

In this embodiment, the upper end of the annular convex plate 28 is also connected to the upper end of the first annular side plate 27 .

Further, as shown in Figures 1, 3-5, and 11-16, the second annular side plate 29 is inclined outward and downward, so that on the one hand, the second annular fire chamber 23 can be increased in size. On the other hand, the second annular fire hole 24 can be conveniently arranged, so that the second annular fire hole 24 can be inclined outward and upward.

Further, as shown in FIGS. 1, 3-5, and 11-16, the fire cover 20 further includes a first connecting ring protrusion 27a that is arranged on the lower peripheral edge of the first annular side plate 27 and extends downward, so The first connecting ring protrusion 27a is used for sealing and fitting connection with the inner ring wall of the first ring air cavity 111 of the bottom cup 10; and/or,

The fire cover 20 further includes a second connecting ring protrusion 29a disposed on the lower peripheral edge of the second annular side plate 29 and extending downward. The second connecting ring protrusion 29a is used to The outer ring wall of the ring air cavity 112 is connected in a sealing fit.

Wherein, in this embodiment, the inner annular wall of the first annular air cavity 111 of the bottom cup 10 is the first annular convex portion 11b, and the outer annular wall of the second annular air cavity 112 of the bottom cup 10 is the first annular convex portion 11b. Three annular protrusions 11d.

In a specific embodiment, a limiting ring protrusion 27b may be provided on the outer ring surface of the connection between the first annular side plate 27 and the first connecting ring protrusion 27a, so that the outer side of the first connecting ring protrusion 27a The first accommodating step 27c is formed; alternatively, the thickness of the first connecting ring protrusion 27a can be made smaller than the thickness of the first annular side plate 27, so as to form the first connecting ring protrusion 27a inside or outside the first connecting ring protrusion 27a. The step 27c is accommodated. In this embodiment, the first accommodating step 27c is formed on the outer side of the first connecting ring protrusion 27a.

In a specific embodiment, the thickness of the second connecting ring protrusion 29a may be smaller than the thickness of the second annular side plate 29, so as to form a second accommodating step 29b inside or outside the second connecting ring protrusion 29a . In this embodiment, the second accommodating step 29b is formed on the outer side of the second connecting ring protrusion 29a.

Specifically, the lower end of the first connecting ring protrusion 27a protrudes downward, so that the first connecting ring protrusion 27a also has the function of guiding and installing.

In this embodiment, the upper end of the third annular convex portion 11d protrudes upward (that is, the upper end of the third annular convex portion 11d protrudes upward from the upper ends of other annular convex portions).

Specifically, in this embodiment, when assembling the burner 100, the fire cover 20 and the bottom cup 10 are made close to each other (for example, the fire cover 20 is arranged above the bottom cup 10, and the fire cover 20 is moved downward), Since the first connecting ring protrusion 27a protrudes downward, the first connecting ring protrusion 27a is first assembled with the first annular protrusion 11b, that is, the first connecting ring protrusion 27a is inserted into the inner side of the first annular protrusion 11b (ie, the center hole 113), so that the first annular protrusion 11b is limited to the first accommodating step 27c; because the fire cover 20 and the bottom cup 10 are both integrally formed, so when the first connecting ring protrusion 27a is connected to the first accommodating step 27c After the first annular protrusions 11b are mutually limited, they can guide the assembly of the fire cover 20 and the bottom cup 10 . Then, when the fire cover 20 and the bottom cup 10 continue to approach each other, the second connecting ring protrusion 29a is inserted into the inner side of the third ring protrusion 11d, so that the third ring protrusion 11d is limited to the second accommodating step 29b; During this process, the lower end of the annular convex plate 28 abuts against the upper end of the second annular convex portion 11c, so that the first annular air cavity 111 communicates with the first annular combustion cavity 21 to form the first annular mixing cavity , and the second annular gas chamber 112 communicates with the second annular combustion chamber 23 to form a second annular mixing chamber.

After the assembly is completed, the first annular convex portion 11b is limited to the first accommodating step 27c, the upper end of the second annular convex portion 11c is in contact with the lower end of the annular convex plate 28, and the third annular convex portion 11d is limited to the second accommodating step 27c. Step 29b is placed.

In this way, by arranging the first accommodating step 27c and confining the first annular convex portion 11b to the first accommodating step 27c, not only the assembly stability can be improved, but also the first annular convex portion 11b and the first connecting annular convex portion can be improved. 27a connection to prevent air leakage; moreover, by setting the second accommodating step 29b and confining the third annular convex portion 11d to the second accommodating step 29b, it can not only improve the assembly stability, but also improve the first accommodating step 29b. The tightness of the connection between the three annular protrusions 11d and the second connecting ring protrusion 29a prevents air leakage. Moreover, it can be understood that since the connection between the annular convex plate 28 and the second annular convex portion 11c is located between the first annular mixing chamber and the second annular mixing chamber, the annular convex plate 28 and the second annular convex portion 11c are The tightness of the connection is not high, so the lower end of the annular convex plate 28 can be abutted with the upper end of the second annular convex portion 11c, so that the structure of the fire cover 20 and the bottom cup 10 can be simplified.

Of course, in other embodiments, the first accommodating step 27c or the second accommodating step 29b may not be provided, for example, only the first connecting ring protrusion 27a can be inserted into the inner side of the first connecting ring protrusion 27a, or Only the second connecting ring protrusion 29a is inserted into the inner side of the third ring protrusion 11d; alternatively, the first accommodating step 27c is arranged on the first ring protrusion 11b, and/or the second accommodating step 11b 29b is provided on the third annular projection 11d; and so on.

Further, as shown in FIGS. 1, 3-5, and 11-16, the fire cover 20 further includes a connecting plate 60 disposed in the first connecting ring protrusion 27a, and two ends of the connecting plate 60 are respectively connected to The inner annular surface of the first connecting ring protrusion 27a, the connecting plate 60 is used to be disposed above the main ejection tube 13 of the bottom cup 10. Specifically, the width of the connecting plate 60 is wider than the width of the main ejection tube 13 .

In this way, by providing the connecting plate 60, on the one hand, the structural strength of the fire cover 20 can be enhanced to enhance it, and on the other hand, the main ejection pipe 13 can be protected to prevent the overflowing soup from spilling onto the main ejection pipe 13. As a result, the temperature of the gas in the main ejection tube 13 increases. In addition, the connecting plate 60 can also hide the main ejection pipe 13 , thereby improving the aesthetics of the burner 100 .

Specifically, the connecting plate 60 is an arc-shaped plate, or, the two side edges of the connecting plate 60 are bent and extended downward.

Further, as shown in Figures 1, 3-5, and 11-16, the inner annular surface of the first annular side plate 27 is provided with an annular flame stabilization groove 271, and the lower side groove wall of the annular flame stabilization groove 271 is provided. There is a third ring fire hole 272 communicating with the first ring fire chamber 21 . Specifically, a plurality of the third annular flame holes 272 are annularly distributed in the circumferential direction of the annular flame stabilization groove 271 . In this way, the combustion stability of the first ring flame can be improved.

Specifically, the annular flame stabilization groove 271 is provided below the air outlet of the first annular flame hole 22 .

Further, as shown in FIGS. 1 , 3-5 , and 11-16 , the third annular fire hole 272 extends in the up-down direction. In this way, on the one hand, the mixed gas flow ejected from the third annular fire hole 272 can be further mixed in the annular flame stabilization groove 271 before flowing out; on the other hand, the structure of the fire cover 20 can be simplified and the production difficulty can be reduced.

Further, as shown in FIGS. 1 , 3-5 and 11-16 , the outer annular surface of the first annular side plate 27 is provided with an air intake annular groove 273 , and the upper groove wall of the air intake annular groove 273 is Corresponding to the lower side groove wall of the annular flame stabilization groove 271 , the air inlet of the third annular flame hole 272 is arranged on the upper side groove wall of the air inlet ring groove 273 . It should be noted that the outer annular surface of the first annular side plate 27 is used to form the side annular wall surface of the first annular combustion chamber 21 .

In this way, by arranging the air inlet ring groove 273 , the flow rate of the air flowing into the third ring fire hole 272 can be easily increased.

Further, as shown in FIGS. 1 , 3-5 , and 11-16 , the bottom wall of the inlet ring groove 273 is connected to the outer ring surface of the first annular side plate 27 . That is to say, the upper side groove wall of the air inlet ring groove 273 and the groove bottom wall are enclosed to form the air inlet ring groove 273 .

It should be specially mentioned here that, in the present invention, since the fire cover 20 and the bottom cup 10 are both integrally formed, the corresponding assembly process can be reduced, thereby facilitating mass production and saving processing manpower and material resources. Moreover, with the above configuration, the temperature uniformity of the first ring flame and the second ring flame can be improved.

In a further embodiment of the fire cover 20 of the present invention, on the basis of the above structure of the fire cover 20, further improvements are made to the fire cover 20, which will be described in detail below.

Further, as shown in FIGS. 1 , 3-5 , and 11-16 , the fire cover 20 also has a split fire hole 50 , and the split fire hole 50 is connected to the gas through hole 25 and the second ring fire chamber 23 Or, the air inlet of the said split fire hole 50 is communicated with the first ring fire cavity 21, and the air outlet of the said split fire hole 50 is arranged on the outer ring wall or the top ring wall of the second ring fire chamber 23, So that the split fire hole 50 communicates with the space outside or above the first ring fire chamber 21 and the second ring fire chamber 23 .

Wherein, a plurality of the split fire holes 50 are distributed annularly in the circumferential direction of the fire cover 20 .

Wherein, when the split fire hole 50 is connected to the air through hole 25 and the second ring fire chamber 23, the air inlet of the split fire hole 50 is communicated with the second ring fire chamber 23, and the outlet of the split fire hole 50 is connected to the second ring fire chamber 23. The gas port is arranged on the inner ring wall of the first ring combustion chamber 21 .

It can be understood that, in the present invention, the gas supply gas paths corresponding to the first ring mixing chamber and the second ring mixing chamber respectively are relatively independent.

For the solution of "the split fire hole 50 is connected through the gas through hole 25 and the second annular fire chamber 23", the fire cover 20 is provided with the split fire hole 50, and the split fire hole 50 is connected through the gas through hole 25 and the second ring fire chamber 23. The ring fire chamber 23 can make the mixed gas flow in the second ring fire chamber 23 flow to the inside of the first ring fire chamber 21 through the split fire holes 50 to form the first ring flame, which is beneficial to improve the The combustion temperature of the inner ring flame (ie the first ring flame); especially when the gas supply power of the ejector tube corresponding to the second ring fire chamber 23 is too large, the second ring fire chamber 23 can be burned The mixed gas is shunted to the inner side of the first ring fire chamber 21 through the shunt fire hole 50, which is beneficial to the improvement of the power and efficiency of the entire burner 100, and can also improve the uniformity of the temperature of the first ring flame and the second ring flame .

For "the air inlet of the split fire hole 50 is communicated with the first ring fire chamber 21, and the air outlet of the split fire hole 50 is set on the outer ring wall or the top ring wall of the second ring fire chamber 23" According to the solution, the mixed gas flow in the first ring fire chamber 21 can be split to the outside or above of the second ring fire chamber 23 through the split fire holes 50, so as to form the second ring flame, which is beneficial to improve the outer ring The combustion temperature of the flame (that is, the flame of the second ring); especially when the gas supply power of the ejector tube corresponding to the first ring fire chamber 21 is too large, part of the mixed gas in the first ring fire chamber 21 can be made The flow is split to the outside or the top of the second ring fire chamber 23 through the split fire holes 50, which is beneficial to the improvement of the power and efficiency of the entire burner 100, and can also improve the temperature uniformity of the first ring flame and the second ring flame. .

Further, as shown in FIGS. 1 , 3-5 , and 11-16 , the split fire holes 50 are arranged obliquely. In this way, the split fire hole 50 can be easily connected to the air through hole 25 and the second ring fire chamber 23; or the space above. Of course, in other embodiments, the split fire holes 50 may also be arranged horizontally, or the split fire holes 50 may be curved to extend, and so on.

For the solution of "the split fire hole 50 is connected through the gas through hole 25 and the second ring fire chamber 23", specifically, as shown in Figures 1, 3-5, and 11-16, the inlet of the split fire hole 50 The air port is arranged on the outer annular surface of the annular convex plate 28 , and the air outlet of the split fire hole 50 is arranged on the inner annular surface of the first annular side plate 27 . In this way, the split fire holes 50 can be embedded in the annular convex plate 28 and the first annular side plate 27 to simplify the structure of the fire cover 20 .

For the solution of "the split fire hole 50 is connected through the gas through hole 25 and the second ring fire chamber 23", specifically, as shown in Figures 1, 3-5, and 11-16, the outlet of the split fire hole 50 The gas port is arranged above the gas outlet of the first ring fire hole 22 . In this way, the interference between the forming of the split fire hole 50 and the forming of the first annular fire hole 22 can be avoided, so as to simplify the structure of the fire cover 20 .

For the solution of "the split fire hole 50 communicates with the space outside or above the first ring fire chamber 21 and the second ring fire chamber 23", specifically, the air inlet of the split fire hole 50 can be set in the annular convex On the inner annular surface of the plate 28 , the gas outlet of the split fire hole 50 is arranged on the upper surface of the annular top plate 26 or the outer annular surface of the second annular side plate 29 . Optionally, the split fire hole 50 can be made to pass through the second annular fire cavity 23, so as to realize that “the air inlet of the split fire hole 50 is arranged on the inner annular surface of the annular convex plate 28, The air port is arranged on the upper surface of the annular top plate 26 or the outer annular surface of the second annular side plate 29 ”.

Optionally, a flow switch (not shown in the figure) is also provided in the split fire hole 50, the flow switch and the inner wall of the split fire hole 50 form a ventilation gap, and the flow switch is used for (according to the first ring fire) The air pressure of the cavity 21 or the air pressure of the second ring combustion chamber 23) adjusts the size of the ventilation gap. Optionally, the flow switch includes a shrapnel, and when the air pressure of the first ring fire chamber 21 or the second ring fire chamber 23 increases, the shrapnel can be lifted to increase the ventilation gap; When the air pressure of the combustion chamber 21 or the air pressure of the second ring combustion chamber 23 decreases, the shrapnel is reset to adjust the ventilation gap.

The structure of the nozzle base 40 will continue to be introduced below.

Further, as shown in FIGS. 2, 3, and 17-20, the nozzle base 40 includes:

mounting substrate 41; and

The support column 42 is protruded from the surface of the mounting substrate 41 , and the support column 42 is used for mounting the nozzle 30 .

Specifically, as shown in FIGS. 2, 3, and 17-20, the mounting substrate 41 is used for mounting on the bottom cup 10, or the mounting substrate 41 is used for mounting on a panel, so as to be mounted on a support column The nozzles 30 on 42 are arranged corresponding to the corresponding ejector tubes.

Specifically, there are a plurality of the support columns 42 , each support column 42 is mounted with a nozzle 30 , and each ejection tube of the bottom cup 10 is correspondingly provided with a nozzle 30 , and the nozzles 30 correspond to Inlet settings for ejector tubes. In this embodiment, three support columns 42 are provided, and three nozzles 30 are provided, respectively corresponding to the first ejection tube 12 , the main ejection tube 13 and the booster ejection tube 14 .

Further, the mounting base plate 41 is provided with a gas pipe assembly hole 411 , the support column 42 is disposed corresponding to the gas pipe assembly hole 411 , and the support column 42 has a gas pipe assembly communicated with the gas pipe assembly hole 411 . A channel 421 and a nozzle mounting hole 422 communicated with the gas pipe assembling channel 421 , and the mounting hole is used for mounting the nozzle 30 .

Specifically, the gas pipe extends into the gas pipe assembling channel 421 through the gas pipe assembling hole 411 from below the mounting base plate 41 , and is connected with the nozzle 30 .

In the present invention, the nozzle base 40 is simple in structure, convenient in production, convenient in mass production, and low in production cost.

Furthermore, the gas pipe fitting hole 411 is provided on the mounting base plate 41 and the gas pipe fitting passage 421 communicated with the gas pipe fitting hole 411 is provided on the support column 42 , so that the gas pipe can extend into the gas pipe from below the mounting base plate 41 The installation channel 421 is connected to the nozzle 30, so that the gas pipe can be fixed, so that the installation stability of the gas pipe can be improved, and the stability of the connection between the gas pipe and the nozzle 30 can be improved, so as to improve the use stability of the burner 100. sex.

Further, as shown in FIGS. 2 , 3 , and 17-20 , the nozzle base 40 further includes an abutting protrusion 412 protruding from the surface of the mounting substrate 41 , and the abutting protrusion 412 is used for contacting with the mounting base 41 . The partition plate 114 at the bottom of the bottom cup 10 of the burner 100 abuts to form a partition wall that half surrounds the support column 42 .

Specifically, the abutting protrusions 412 are disposed close to the edge of the mounting substrate 41 , or the abutting protrusions 412 are disposed on the edge of the mounting substrate 41 .

In this way, by disposing the abutting protrusions 412 on the surface of the mounting substrate 41 to abut against the partition plate 114 at the bottom of the bottom cup 10 , the abutting protrusions 412 and the partition plate 114 can form a partition wall that half surrounds the support column 42 . , so that the space below the cup body 11 can be further divided into two parts by the partition wall, so as to form the air supply area for the primary air and the secondary air respectively. Furthermore, by providing the abutting protrusions 412 , the structural strength of the mounting substrate 41 can also be enhanced.

Of course, in other embodiments, the abutting protrusions 412 may not be provided, and the partition plate 114 at the bottom of the bottom cup 10 may be directly abutted against the surface of the mounting substrate 41 .

Further, as shown in FIGS. 2 , 3 , and 17-20 , the nozzle base 40 further includes an air distribution plate (not shown) protruding from the surface of the mounting base 41 , and every two adjacent supports An air distribution plate is arranged between the columns 42 . Wherein, the air distribution plate extends along the jetting direction of the nozzle 30 .

Specifically, the air distribution plate is arranged between the air inlets of two adjacent ejection pipes. In this way, the air entering the two adjacent ejection tubes can be separated by the air dividing plate, so that the phenomenon of air grabbing of the primary air entering the two adjacent ejection tubes can be avoided.

In this embodiment, there are two air distribution plates, one of which is arranged between the air inlets of the first ejection pipe 12 and the main ejection pipe 13, and the other air distribution plate is arranged between the supercharged ejection pipe 14 and the air inlet of the main ejection pipe 13 .

Further, as shown in FIGS. 2 , 3 , and 17-20 , the air distribution plate is disposed on the air outlet side of the support column 42 . The air intake side of the support column 42 refers to the air outlet side of the nozzle 30 .

In this way, it can be avoided that the air distribution plate affects the suction effect of the gas ejected from the nozzle 30 on the air on the peripheral side.

Of course, in other embodiments, the diverter plate can also extend between the two support columns 42, and so on.

Further, as shown in FIGS. 2 , 3 , and 17-20 , the mounting substrate 41 , the support column 42 and the air distribution plate are integrally formed. As such, assembly may be avoided, thereby simplifying the installation process of the burner 100 .

Of course, in other embodiments, only the mounting base plate 41 and the support column 42 can be integrally formed, and the air distribution plate is separately mounted (eg, detachably mounted) on the mounting base plate 41; The base plate 41 and the air distribution plate are integrally formed, and the support column 42 is separately installed (eg, detachably installed) on the mounting base plate 41; substrate 41; and so on. In order to reduce the production difficulty of the nozzle base 40 .

Further, as shown in FIGS. 2, 3, and 17-20, the mounting holes are provided on the side of the support column 42, and the support column 42 has a windward side 424 opposite to the side where the mounting holes are located. The windward side 424 is an arc surface.

In this way, by setting the windward side surface 424 as an arc (column) surface, the wind resistance when the air passes through the support column 42 can be reduced, thereby reducing the influence of the support column 42 on the air suction effect of the gas ejected from the nozzle 30 on the surrounding side. .

Specifically, the windward side surface 424 is a circular arc surface. In this way, by setting the windward side surface 424 as a circular arc surface, the difficulty of production can be reduced.

Further, as shown in FIGS. 2 , 3 , and 17-20 , the support column 42 also has an avoidance cut surface 423 chamfering the top of the support column 42 to avoid the annular inclined side of the bottom cup 10 of the burner 100 plate 11e. The avoidance cut surface 423 is disposed on the windward side of the support column 42 .

Specifically, the nozzle base 40 is disposed at the bottom of the bottom cup 10, and the support column 42 is disposed corresponding to the annular inclined side plate 11e of the bottom cup 10. If the support column 42 is too high, the support column 42 will be easy to be assembled with the annular inclined side plate. 11e interferes. By disposing the avoidance cut surface 423 on the top of the support column 42, on the one hand, it is not necessary to reduce the overall height of the support column 42 to avoid affecting the installation height of the nozzle 30; The annular inclined side plate 11e interferes.

Specifically, the avoidance cut surface 423 is an inclined surface, so as to reduce the production difficulty of the support column 42 ; of course, the avoidance cut surface 423 can also be set as an arc cut surface.

Specifically, the positions of the avoidance cut surfaces 423 on different support columns 42 are also different, so as to be compatible with the lower surface of the annular inclined side plate 11e.

Further, as shown in FIGS. 2 , 3 , and 17-20 , the support column 42 is arranged in a flat (column) shape.

In this way, the nozzle mounting hole 422 can be easily formed and the hole length of the nozzle mounting hole 422 can be increased, so as to improve the mounting stability of the nozzle 30 .

Further, as shown in FIGS. 2 , 3 , and 17-20 , the mounting substrate 41 is a fan-shaped board. In this way, it is convenient for the nozzle base 40 to be hidden under the bottom cup 10 , so as to facilitate the miniaturization of the burner 100 .

In this embodiment, as shown in FIGS. 2 , 3 , and 17-20 , the three supporting columns 42 are arranged in a row, and the centerlines of the mounting holes of the supporting columns 42 located on the two sides and the center line of the mounting holes located in the middle The centerline of the mounting hole of the support column 42 is arranged at an acute angle. In other words, the center line of the mounting hole of the support column 42 corresponding to the first ejection tube 12 is arranged at an acute angle with the center line of the mounting hole of the support column 42 corresponding to the main ejection tube 13, and the corresponding pressure booster guide The center line of the mounting hole of the support column 42 provided in the ejection tube 14 is arranged at an acute angle with the center line of the mounting hole of the support column 42 corresponding to the main ejection tube 13 .

In this way, it is convenient to set the nozzle 30 directly to the air inlet of the corresponding ejection pipe, so as to improve the suction effect on the primary air.

For the flat (column)-shaped support columns 42, the support columns 42 located on the two sides and the support column 42 located in the middle can be arranged at an acute angle, so that the mounting holes of the support columns 42 located on the two sides can be arranged at an acute angle. The center line is arranged at an acute angle with the center line of the mounting hole of the support column 42 located in the middle.

In another embodiment of the burner of the present invention, the fire cover further has a third ring fire chamber provided on the outer side of the second ring fire chamber, and correspondingly, the cup body further has a third ring fire chamber provided on the second ring fire chamber. The third ring air chamber outside the air chamber, the bottom cup also includes a third ejection pipe arranged at the bottom of the cup body and communicated with the third ring air chamber, the third ring fire chamber and the third ring air chamber The chambers communicate to form a third annular mixing chamber. In this embodiment, optionally, the outer ring wall of the second ring fire chamber is spaced from the inner ring wall of the third ring fire chamber, and the outer ring wall of the second ring gas chamber is spaced from the third ring fire chamber. The inner ring walls of the annular air cavity are arranged at intervals.

The present invention also provides a gas stove, which includes a burner. The specific structure of the burner refers to the above-mentioned embodiments. Since the gas stove of the present invention adopts all the technical solutions of all the above-mentioned embodiments, it has at least the above-mentioned embodiments. All the beneficial effects brought by the technical solution will not be repeated here.

The above descriptions are only optional embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, any equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect Applications in other related technical fields are included in the scope of patent protection of the present invention.

Claims (16)

1. A fire cover for a burner, the fire cover having:

a gas passing through hole;

the first annular combustion cavity is arranged on the outer side of the gas through hole;

the second annular combustion chamber is arranged on the outer side of the first annular combustion chamber; and

the flow dividing fire hole is communicated with the gas through hole and the second annular fire cavity; or the gas inlet of the flow dividing fire hole is communicated with the first annular fire cavity, and the gas outlet of the flow dividing fire hole is arranged on the outer ring wall or the top ring wall of the second annular fire cavity; the fire distribution holes are annularly distributed on the periphery of the fire cover.

2. The fire cover of claim 1 wherein said fire diversion holes are obliquely disposed.

3. The fire cover of claim 2, wherein the fire cover comprises an annular top plate, a first annular side plate arranged on the inner periphery of the annular top plate, an annular convex plate arranged on the lower surface of the annular top plate in a protruding mode, and a second annular side plate arranged on the outer periphery of the annular top plate, wherein the first annular side plate and the annular convex plate form the first annular fire chamber therebetween, and the second annular side plate and the annular convex plate form the second annular fire chamber therebetween;

the gas inlet of the fire shunting hole is formed in the outer annular surface of the annular convex plate, and the gas outlet of the fire shunting hole is formed in the inner annular surface of the first annular side plate.

4. The fire cover of claim 3 wherein said first annular side plate is inwardly and downwardly angled and/or said second annular side plate is outwardly and downwardly angled.

5. The fire lid as claimed in claim 4, further comprising a first coupling ring protrusion provided at a lower peripheral edge of the first annular side plate and extending downward, the first coupling ring protrusion being adapted to be coupled with an inner annular wall of the first annular chamber of the base cup in a sealing engagement; and/or the presence of a gas in the gas,

the fire cover further comprises a second connecting ring protrusion which is arranged on the lower periphery of the second annular side plate and extends downwards, and the second connecting ring protrusion is used for being in sealing fit connection with the outer annular wall of the second annular air cavity of the bottom cup.

6. The fire cover of claim 5, wherein the first coupling ring projection has a thickness less than that of the first annular side plate to form a first receiving step at an inner or outer side of the first coupling ring projection; or,

a limiting ring bulge is arranged on the outer ring surface of the joint of the first annular side plate and the first connecting ring bulge so as to form a first accommodating step on the outer side of the first connecting ring bulge; and/or the presence of a gas in the gas,

the thickness of the second connecting ring protrusion is smaller than that of the second annular side plate, so that a second accommodating step is formed on the inner side or the outer side of the second connecting ring protrusion.

7. The fire cover of claim 5, further comprising a connecting plate disposed inside the first connecting ring protrusion, wherein two ends of the connecting plate are respectively connected to the inner annular surface of the first connecting ring protrusion, and the connecting plate is disposed above the main injection pipe of the bottom cup.

8. The fire cover of claim 4, further comprising a first annular fire hole disposed inwardly on said first annular side plate, said first annular fire hole communicating with said first annular fire chamber; and/or the presence of a gas in the gas,

the fire cover is also provided with a second annular fire hole which is arranged outwards on the second annular side plate, and the second annular fire hole is communicated with the second annular fire burning cavity.

9. The fire cover of claim 8, wherein when the branch fire hole communicates with the gas passing through hole and the second annular fire chamber, the gas outlet of the branch fire hole is arranged above the gas outlet of the first annular fire hole.

10. The fire cover of claim 4, wherein the inner annular surface of the first annular side plate is provided with an annular flame stabilizing groove, and a lower side groove wall of the annular flame stabilizing groove is provided with a third annular fire hole communicated with the first annular fire cavity.

11. The fire cover of claim 10, wherein the third ring fire hole extends in an up-and-down direction.

12. The fire cover of claim 11, wherein the outer circumferential surface of the first annular side plate is provided with an air inlet ring groove, an upper groove wall of the air inlet ring groove is disposed to correspond to a lower groove wall of the annular flame stabilizing groove, and the air inlet of the third annular fire hole is disposed in the upper groove wall of the air inlet ring groove.

13. The fire cover of claim 12, wherein a groove bottom wall of the air inlet ring groove is connected to an outer circumferential surface of the first annular side plate.

14. The fire cover of any one of claims 1-13, wherein the fire cover further has a third annular fire chamber disposed outside the second annular fire chamber.

15. A burner comprising a base cup as claimed in any one of claims 1 to 14.

16. Hob, characterized in, that it comprises a burner as claimed in claim 15.

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