Central fire cover and stove burner

Abstract

The utility model relates to a central fire cover and a stove burner. The central fire cover comprises a spacing part, a first sub-cover body and a third sub-cover body, wherein the first sub-cover body and the third sub-cover body are stacked; the spacing part is arranged between the first sub-cover body and the third sub-cover body; and the first sub-cover body and the third sub-cover body are separated by the spacing part to form a first annular air passage and a second annular air passage which are adjacently arranged. The burner has the advantages that the two air channels are arranged adjacently, so that the two air channels can be ignited again through flames beside the two air channels when leaving the flame, the two air channels can be matched with each other to stabilize the flame, and combustion efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, and specifically relates to a center fire cover and a cooking appliance burner provided with the center fire cover. BACKGROUND

[0002] At present, some burners with slit fire structure appear on the market, and the burners are generally composed of single-ring slits or multiple-ring slits, but in actual use, the flame is prone to flame separation, causing the condition of flameout. SUMMARY

[0003] The utility model solves the technical problems that a center fire cover and a cooking appliance burner are provided to improve the stability of slit fire flame and reduce the degree of flame separation.

[0004] The technical scheme for solving the above technical problems is as follows: a center fire cover comprises a spacing part and first and third sub-cover bodies arranged in layers; the spacing part is arranged between the first and third sub-cover bodies; and the spacing part separates the first and third sub-cover bodies to form first and second annular air passages arranged adjacently.

[0005] The center fire cover has the beneficial effects that the first and second annular air passages are arranged adjacently, so that the flame can be re-ignited by the flame beside when the flame separates, thereby the flames can be stabilized by mutual cooperation and the combustion efficiency is improved.

[0006] On the basis of the above technical scheme, the utility model can be further improved as follows.

[0007] Further, the first and second annular air passages are arranged along the circumference of the center fire cover, the first annular air passage is arranged at the outer ring of the second annular air passage, and the air outlet directions of the first and second annular air passages are consistent.

[0008] Further, the spacing part is a second sub-cover body, the first annular air passage is formed between the first and second sub-cover bodies, and the second annular air passage is formed between the second and third sub-cover bodies.

[0009] Further, the first sub-cover body has a plurality of first through holes, the first through holes are in communication with the first annular air passage, so that the air entering from the first through holes can further enter the first annular air passage, achieving the effect of combustion support; the second sub-cover body has a plurality of second through holes, the first and second annular air passages are in communication through the second through holes, so that they can support each other in combustion. For example, when the flame in the first annular air passage separates or is extinguished, the second annular air passage can ignite the burner, thereby ensuring the combustion state of the burner.

[0010] Further, the first sub-cover body comprises a first bottom wall and a first side wall, and a plurality of first through holes are annularly arranged on the first bottom wall.

[0011] Further, the first through hole comprises a first sub-through hole and a second sub-through hole, the first sub-through hole is annularly arranged at the periphery of the second sub-through hole, and the aperture of the first sub-through hole is larger than the aperture of the second sub-through hole, so that the amount of air entering the first sub-through hole is more than the amount of air entering the second sub-through hole.

[0012] Further, an annular partition is arranged between the first sub-through hole and the second sub-through hole, and the two ends of the annular partition abut the first bottom wall and the second bottom wall respectively.

[0013] Further, the second sub-cover body comprises a second bottom wall and a second side wall, and the second through hole is annularly arranged on the second bottom wall. The second through hole is preferably arranged on the second bottom wall, so that the annular partition can separate the first sub-through hole from the second sub-through hole.

[0014] Further, the first sub-through hole is in communication with the first annular air channel, the second sub-through hole is in communication with the second through hole and the second annular air channel in sequence, and the annular partition separates the first annular air channel from the second annular air channel, so that the first annular air channel and the second annular air channel independently intake and exhaust air.

[0015] Further, the first sub-cover body and the third sub-cover body are detachably connected, so as to facilitate disassembly and maintenance.

[0016] Further, the first sub-cover body has a first boss, the third sub-cover body has a second annular protrusion, and the first sub-cover body and the third sub-cover body are plug-in connected through the first boss and the second annular protrusion.

[0017] Further, the outer side of the first boss or the second annular protrusion has the spacing portion, so as to space the first annular air channel and the second annular air channel.

[0018] Further, the spacing portion is arranged along the circumference of the center fire cover and extends towards the periphery along the first boss or the second annular protrusion.

[0019] Further, the spacing portion is arranged parallel to the side wall of the first sub-cover body or the side wall of the third sub-cover body.

[0020] Further, the second sub-cover body comprises a second bottom wall and a second side wall, the second side wall is arranged obliquely relative to the second bottom wall, and the second through hole is annularly arranged on the second side wall, so that the problem that the overflow liquid blocks the second through hole after entering the second annular air channel and the gas cannot pass through can be avoided, and the overflow liquid can flow out of the oblique second side wall, and the second through hole is unobstructed.

[0021] Further, the air inlet hole is arranged at the center of the first bottom wall, and the air inlet hole is in communication with the first annular air channel; or the air inlet hole is arranged at the center of the first bottom wall, and the air inlet hole is in communication with the first annular air channel and the second annular air channel. It can be understood that the air inlet hole arranged at the center of the first bottom wall can first enter the first annular air channel and then enter the second annular air channel through the second through hole; or the air inlet hole can be arranged to make the gas enter the first annular air channel and the second annular air channel at the same time after the air inlet hole arranged at the center of the first bottom wall, for example, the air inlet hole is directly in communication with the first annular air channel and the second annular air channel.

[0022] Further, the first connecting wall connecting the first side wall and the second side wall is arranged between the first side wall and the second side wall, and the second connecting wall connecting the second side wall and the third side wall is arranged between the second side wall and the third side wall; the first connecting wall has a first air vent in communication with the first annular air channel, and the second connecting wall has a second air vent in communication with the second annular air channel. That is, when the air inlet hole is arranged at the center of the first bottom wall, the first sub-cover body, the second sub-cover body and the third sub-cover body can be connected at the periphery, for example, the connecting walls are arranged between the first side wall and the second side wall and between the second side wall and the third side wall, respectively, and the air vents are arranged on the connecting walls to facilitate the flow of gas. Alternatively, a plurality of sub-connecting walls can be arranged at intervals on the first side wall and the second side wall, so that gaps are formed between adjacent sub-connecting walls, and the first annular air channel passes through the gaps for ventilation.

[0023] Further, the width of the first annular air channel and the width of the second annular air channel are both less than or equal to 5 mm, so as to form a narrow and long gas passage.

[0024] Further, the first annular air channel and the second annular air channel are arranged in parallel, so that the gas outlet directions of the first annular air channel and the second annular air channel are consistent, which is helpful to realize mutual combustion assistance of the first annular air channel and the second annular air channel.

[0025] Further, the distance between the first center line in the depth direction of the first annular air channel and the second center line in the depth direction of the second annular air channel is in the range of 3 mm to 8 mm.

[0026] Further, the gas flow rate of the first annular gas passage is greater than that of the second annular gas passage, so that the flame of the first annular gas passage burns more vigorously and more fully, and the flame of the second annular gas passage has higher stability.

[0027] Further, the first through hole is in communication with the mixing chamber of the gas stove burner.

[0028] Further, the bottom end of the first bottom wall has a first extension portion extending to the mixing chamber of the gas stove burner to communicate the first through hole with the mixing chamber, so that gas can enter the gas passage from the first through hole while ensuring the air tightness of the central fire cover.

[0029] Further, the first sub-cover body and the second sub-cover body are detachably connected, and the second sub-cover body and the third sub-cover body are also detachably connected, so as to facilitate disassembly, assembly and maintenance.

[0030] Further, one of the first sub-cover body and the second sub-cover body has a first boss, and the other has a first annular protrusion matched with the first boss to realize detachable connection; one of the second sub-cover body and the third sub-cover body has a second boss, and the other has a second annular protrusion matched with the second boss to realize detachable connection, which is simple in structure and convenient to install.

[0031] Further, the third sub-cover body comprises a third bottom wall and a third side wall, which surround to form a containing groove for containing overflow liquid, so as to prevent the liquid overflowing from the cooking utensil from directly blocking the gas passage and causing flameout during cooking, thereby ensuring the stability of the flame.

[0032] Further, the first bottom wall, the second bottom wall and the third bottom wall are all flat and arranged in parallel with each other; the first side wall, the second side wall and the third side wall are all arranged obliquely relative to the first bottom wall, the second bottom wall and the third bottom wall, and the first side wall, the second side wall and the third side wall are arranged in parallel with each other. On the one hand, the first sub-cover body, the second sub-cover body and the third sub-cover body are convenient to install, and on the other hand, the first annular gas passage and the second annular gas passage can be arranged obliquely, thereby facilitating air outlet.

[0033] The technical problem to be solved by the utility model is the instability of the flame of the central fire cover and the high degree of flame separation in the prior art.

[0034] The technical solution for solving the above technical problem is as follows: a gas stove burner is installed with the central fire cover.

[0035] The center fire cover has the beneficial effects of the center fire cover. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 Fig. 1 is a schematic diagram of the overall structure of a center fire cover according to the present application;

[0037] Figure 2 Fig. 2 is a schematic diagram of the exploded structure of a first embodiment of the center fire cover according to the present application;

[0038] Figure 3 Fig. 3 is a schematic diagram of the cross-sectional structure of the center fire cover along the B-B line in the first embodiment of the center fire cover according to the present application; Figure 2

[0039] Fig. 4 is a schematic diagram of the cross-sectional structure of the center fire cover along the A-A line in the first embodiment of the center fire cover according to the present application; Figure 4 Figure 1 Fig. 5 is a schematic diagram of the airflow flow of the first embodiment of the center fire cover according to the present application;

[0040] Figure 5 Fig. 6 is a schematic diagram of the cross-sectional structure of the center fire cover according to the present application in a second embodiment;

[0041] Figure 6 Fig. 7 is a schematic diagram of the cross-sectional structure of the center fire cover along the A-A line in the second embodiment of the center fire cover according to the present application;

[0042] Figure 7 Figure 1 Fig. 8 is a schematic diagram of the airflow flow of the second embodiment of the center fire cover according to the present application;

[0043] Figure 8 Fig. 9 is a schematic diagram of a second structure of a spacing portion of the center fire cover according to the present application; wherein the spacing portion is arranged outside a second annular protrusion;

[0044] Figure 9 Fig. 10 is a schematic diagram of a second structure of a spacing portion of the center fire cover according to the present application; wherein the spacing portion is arranged outside a first protrusion;

[0045] Figure 10 Fig. 11 is a schematic diagram of the cross-sectional structure of the center fire cover along the A-A line in the third embodiment of the center fire cover according to the present application;

[0046] Figure 11 Fig. 12 is a schematic diagram of the airflow flow of the first structure of the third embodiment of the center fire cover according to the present application; Figure 1

[0047] Fig. 13 is a schematic diagram of the cross-sectional structure of the center fire cover along the A-A line in the third embodiment of the center fire cover according to the present application; Figure 12

[0048] Fig. 14 is a schematic diagram of the airflow flow of the first structure of the third embodiment of the center fire cover according to the present application; Figure 13 Figure 1 ​​​Second structural cross-sectional view of the third embodiment along B-B line of the central fire cover in the utility model;

[0049] Figure 14 Airflow schematic view of the second structure of the third embodiment of the central fire cover of the utility model;

[0050] Figure 15 For Figure 1 Third structural cross-sectional view of the third embodiment along A-A line of the central fire cover in the utility model;

[0051] Figure 16 Airflow schematic view of the third structure of the third embodiment of the central fire cover of the utility model;

[0052] Figure 17 Whole structure schematic view of the stove burner of the utility model.

[0053] In the drawings, the component list represented by each sign is as follows:

[0054] 10, first sub-cover body; 101, first annular air channel; 102, second annular air channel; C1, first center line, C2, second center line, W1, first air channel width, W2, second air channel width, 103, air inlet; 104, air outlet; X, air outlet direction; 11, first bottom wall; 110, first through hole; 111, first sub-through hole; 112, second sub-through hole; 12, first side wall; 13, first extension part; 14, first boss; 15, annular partition; 20, second sub-cover body; 21, second bottom wall; 22, second side wall; 221, second through hole; 23, second boss; 24, first annular protrusion; 30, third sub-cover body; 31, third bottom wall; 32, third side wall; 33, accommodating groove; 34, second annular protrusion; 35, first connecting wall, 351, first air vent, 36, second connecting wall, 361, second air vent, 37, sub-connecting wall, 38, second gap, 40, spacing part; 100, central fire cover; 200, stove burner; 201, outer ring fire cover; 202, mounting bracket; 2021, supporting leg; 203, mixing cavity; 204, air inlet pipe; 205, mounting cavity. DETAILED DESCRIPTION

[0055] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used for explaining the utility model and are not used for limiting the scope of the utility model.

[0056] In order to solve the single-ring seam in the prior art which is prone to flame separation and causes flameout, and improve the combustion stability of the central fire cover, the utility model designs a new central fire cover structure.

[0057] As Figures 1 to 8A center fire cover 100 is shown, which is provided by the embodiment of the application and used for a stove burner 200. The center fire cover 100 comprises a spacing part 40 and a first sub-cover body 10 and a third sub-cover body 30 which are stacked. The spacing part 40 is arranged between the first sub-cover body 10 and the third sub-cover body 30. The spacing part 40 separates the first sub-cover body 10 and the third sub-cover body 30 to form a first annular air channel 101 and a second annular air channel 102 which are arranged adjacently. The first annular air channel 101 and the second annular air channel 102 are arranged adjacently, and can be re-ignited by the flame beside when the flame is extinguished, so as to cooperate with each other to stabilize the flame and improve the combustion efficiency.

[0058] Further, the first annular air channel 101 and the second annular air channel 102 are arranged along the circumference of the center fire cover 100. The first annular air channel 101 is arranged outside the second annular air channel 102, and the air outlet directions X of the first annular air channel 101 and the second annular air channel 102 are consistent. For example, the included angle difference between the air outlet direction X of the first annular air channel 101 and the air outlet direction X of the second annular air channel 102 is less than 10 degrees, and preferably, the air outlet direction X of the first annular air channel 101 is parallel to the air outlet direction X of the second annular air channel 102. It can be understood that the air outlet 104 of the first annular air channel 101 is also parallel to the air outlet 104 of the second annular air channel 102. In the embodiment, the air inlet hole 103 is arranged on the bottom wall of the first sub-cover body 10, and the air outlet 104 is the end of the first annular air channel 101 or the second annular air channel 102 which is away from the bottom wall of the first sub-cover body 10.

[0059] For example, the distance between the first center line C1 of the first annular air channel 101 along the depth direction and the second center line C2 of the second annular air channel 102 along the depth direction is 0.5-1.5 times of the first annular air channel width W1 or the second annular air channel width W2.

[0060] For another example, the distance between the first center line C1 of the first annular air channel 101 along the depth direction and the second center line C2 of the second annular air channel 102 along the depth direction is 3-8 mm, preferably 4-6 mm, and preferably 5 mm, so that the mutual combustion supporting effect of the first annular air channel 101 and the second annular air channel 102 is better.

[0061] The first structure of the spacing part 40:

[0062] For example, the spacing part 40 is arranged on the first sub-cover body 10 and the third sub-cover body 30, and the spacing part 40 is arranged on the first sub-cover body 10 and the third sub-cover body 30. Figures 1 to 6As shown, the spacing part 40 of the center fire cover 100 is the second sub-cover body 20, the first sub-cover body 10 and the second sub-cover body 20 can be spaced by setting the spacing structure (not marked in the figure) configured with each other, so that they are spaced, thereby forming the first annular air channel 101; the second sub-cover body 20 and the third sub-cover body 30 can also be spaced by setting the spacing structure configured with each other, forming the second annular air channel 102; in this embodiment, the first annular air channel 101 and the second annular air channel 102 are formed adjacent and close to each other by isolating the first sub-cover body 10 and the third sub-cover body 30 through the second sub-cover body 20, the first annular air channel 101 and the second annular air channel 102 are preferably arranged in parallel and close to each other, so that they can mutually assist combustion, when the flame in the first annular air channel 101 is away from the flame or extinguished, the second annular air channel 102 can ignite the burner, thereby ensuring the combustion state of the burner.

[0063] The first sub-cover body 10 has a plurality of first through holes 110, the first through holes 110 are in communication with the first annular air channel 101, so that the air entering from the first through holes 110 can further enter the first annular air channel 101, achieving the effect of combustion support.

[0064] Specifically, the first sub-cover body 10 includes a first bottom wall 11 and a first side wall 12, and a plurality of first through holes 110 can be annularly arranged on the first bottom wall 11. The first through holes 110 can include two circles or one circle. It can be understood that arranging the first through holes 110 in two circles can improve the air intake efficiency of the first annular air channel 101 and the second annular air channel 102. In other embodiments, the plurality of first through holes 110 can also be arranged as an interrupted circular ring, half a circle, or irregularly arranged on the first bottom wall 11, as long as the air volume of the first through holes 110 is sufficient.

[0065] As shown in Figure 2 and Figure 7 The second sub-cover body 20 has a plurality of second through holes 221, and the first annular air channel 101 and the second annular air channel 102 are in communication through the second through holes 221. Specifically, the second sub-cover body 20 includes a second bottom wall 21 and a second side wall 22, and the second side wall 22 is inclined relative to the second bottom wall 21, that is, the second bottom wall 21 and the second side wall 22 have a certain included angle. The second through holes 221 can be arranged on the second bottom wall 21 or the second side wall 22, so that the first annular air channel 101 and the second annular air channel 102 are in communication through the second through holes 221, so that the gas in the first annular air channel 101 can further enter the second annular air channel 102 through the second through holes 221. Thus, they can mutually assist combustion, for example, when the flame in the first annular air channel 101 is away from the flame or extinguished, the second annular air channel 102 can ignite the burner, thereby ensuring the combustion state of the burner.

[0066] The aperture of the second through hole 221 can be the same as or different from the aperture of the first through hole 110. In order to ensure the gas flow rate of the first annular gas channel 101, the aperture of the second through hole 221 is preferably less than or equal to the aperture of the first through hole 110. For example, the aperture of the second through hole 221 can be less than the aperture of the first sub-through hole 111 and equal to the aperture of the second sub-through hole 112.

[0067] The first annular gas channel 101 and the second annular gas channel 102 are preferably arranged in parallel, so that the gas outlet directions of the first annular gas channel 101 and the second annular gas channel 102 are consistent, and the two are arranged close to each other, so as to mutually assist the combustion of the burner head (not marked in the figure) of the gas stove burner 200. For example, when the flame in the first annular gas channel 101 is separated from the flame or extinguished, the second annular gas channel 102 can ignite the burner head, thereby ensuring the combustion state of the burner head.

[0068] As shown in Figures 1 to 7 The third sub-cover 30 can include a third bottom wall 31 and a third side wall 32 arranged obliquely relative to the third bottom wall 31, and the third bottom wall 31 and the third side wall 32 surround to form a containing groove 33 for containing overflow liquid. The containing groove 33 can be a pit structure, which can prevent the overflow liquid from directly blocking the gas channel and causing the flame to extinguish during cooking, thereby ensuring the stability of the flame.

[0069] The second structure of the spacing portion 40:

[0070] As shown in Figures 9 to 10 The first sub-cover 10 and the third sub-cover 30 are detachably connected, thereby facilitating disassembly and maintenance.

[0071] Specifically, the first sub-cover 10 has a first boss 14, and the third sub-cover 30 has a second annular protrusion 34, and the first sub-cover 10 and the third sub-cover 30 are connected by plugging the first boss 14 and the second annular protrusion 34.

[0072] Further, the first boss 14 or the second annular protrusion 34 has a spacing portion 40 on the outer side, so as to arrange the first annular gas channel 101 and the second annular gas channel 102 apart. The spacing portion 40 is arranged along the circumference of the central fire cover 100 and extends towards the periphery along the first boss 14 or the second annular protrusion 34, so as to achieve the purpose of effective isolation. The spacing portion 40 is arranged parallel to the side wall of the first sub-cover 10 or the side wall of the third sub-cover 30, so as to facilitate the flow of gas in the first annular gas channel and the second annular gas channel.

[0073] As shown in Figure 9As shown, the spacing portion 40 is arranged outside the second annular protrusion 34, and can be integrally formed with the second annular protrusion 34 or welded to the second annular protrusion 34 for preparation. By arranging the spacing portion 40 outside the second annular protrusion 34, the first annular air channel 101 and the second annular air channel 102 can be isolated.

[0074] As shown, the spacing portion 40 is arranged outside the first protrusion 14, and can be integrally formed with the first protrusion 14 or welded to the first protrusion 14 for preparation. By arranging the spacing portion 40 outside the first protrusion 14, the first annular air channel 101 and the second annular air channel 102 can be isolated. Figure 10

[0075] The first through hole 110 is in communication with the mixing chamber 203 of the stove burner 200, so that the gas and air in the mixing chamber 203 can enter the first through hole 110 and enter the first annular air channel 101 and the second annular air channel 102 through the first through hole 110.

[0076] Specifically, the first bottom wall 11 has a first extension 13 at the bottom end, which extends from the outer end of the first bottom wall 11 and can be arranged in a ring shape. The first extension 13 extends to the mixing chamber 203 of the stove burner 200 to communicate the first through hole 110 with the mixing chamber 203, so that the gas can enter the air channel from the first through hole 110 while ensuring the air tightness of the center fire cap 100. For example, the first extension 13 can extend to the inside or outside of the side wall of the mixing chamber 203 and be detachably connected to the side wall of the mixing chamber 203 by clamping or threaded connection.

[0077] The air channel structure of the center fire cap 100 will be described in detail below through specific embodiments.

[0078] First embodiment:

[0079] As shown, in this embodiment, a plurality of second through holes 221 can be arranged in a ring shape on the second side wall 22. Compared with arranging the second through holes 221 on a plane, arranging the second through holes 221 on the inclined second side wall 22 can avoid the problem that the overflow liquid blocks the second through holes 221 after entering the second annular air channel 102, so that the overflow liquid can flow out of the inclined second side wall 22, ensuring smooth airflow of the second through holes 221. Figures 2 to 5 In this embodiment, the first through hole 110 can be two or one circle, preferably two circles, to ensure sufficient air intake.

[0080] Specifically, as shown in the first embodiment, the first bottom wall 11 has a first extension 13 at the bottom end, which extends from the outer end of the first bottom wall 11 and can be arranged in a ring shape. The first extension 13 extends to the mixing chamber 203 of the stove burner 200 to communicate the first through hole 110 with the mixing chamber 203, so that the gas can enter the air channel from the first through hole 110 while ensuring the air tightness of the center fire cap 100. For example, the first extension 13 can extend to the inside or outside of the side wall of the mixing chamber 203 and be detachably connected to the side wall of the mixing chamber 203 by clamping or threaded connection.

[0081] Figures 3 to 7 ​​As shown, in this embodiment, the first through hole 110 includes a first sub-through hole 111 and a second sub-through hole 112, with the first sub-through hole 111 surrounding the second sub-through hole 112.

[0082] In this embodiment, both air and fuel gas entering through the first through hole 110 of the first bottom wall 11 can pass through the first sub-through hole 111 and the second sub-through hole 112. A portion flows out through the first gap (not shown) between the first sub-cover 10 and the second sub-cover 20, i.e., the outlet 104 of the first annular gas passage 101; the other portion flows from the first annular gas passage 101 through the second through hole 221 into the second annular gas passage 102 and then out through the outlet 104. It can be understood that since the first annular gas passage 101 is directly connected to the first through hole 110, the gas flow rate of the first annular gas passage 101 is greater than that of the second annular gas passage 102. This results in a larger flame in the first annular gas passage 101 and a relatively smaller flame in the second annular gas passage 102 during combustion, allowing the two annular gas passages to mutually support combustion. For example, if the flame in the first annular gas channel 101 is too large and detaches, the second annular gas channel 102, located in the inner ring, will always have a flame. The second annular gas channel 102 can ignite the gas in the first annular gas channel 101, thereby ensuring the combustion state of the burner head and achieving a stable flame effect. The first through hole 110, as an air inlet 103, is annularly opened on the first bottom wall 11. Through multiple air inlets 103 arranged in a ring, small-hole air intake is achieved, making the flame output of the burner head more precise.

[0083] Second embodiment:

[0084] like Figures 6 to 8 As shown, in this embodiment, the first through hole 110 includes a first sub-through hole 111 and a second sub-through hole 112. The first sub-through hole 111 is arranged around the periphery of the second sub-through hole 112, and the diameter of the first sub-through hole 111 is larger than the diameter of the second sub-through hole 112, so that the amount of air entering the first sub-through hole 111 is greater than the amount of air entering the second sub-through hole 112. A partition structure (not shown in the figure) is provided between the first sub-through hole 111 and the second sub-through hole 112, specifically an annular partition 15, to isolate the first sub-through hole 111 from the second sub-through hole 112; the two ends of the annular partition 15 abut against the first bottom wall 11 and the second bottom wall 21 respectively, to separate the plurality of first sub-through holes 111 from the plurality of second sub-through holes 112.

[0085] Correspondingly, multiple second through holes 221 are annularly formed on the second bottom wall 21. The first sub-through hole 111 communicates with the first annular air passage 101; the second sub-through hole 112 communicates sequentially with the second through hole 221 and the second annular air passage 102, so that the annular partition 15 separates the first annular air passage 101 and the second annular air passage 102, thereby allowing the first annular air passage 101 and the second annular air passage 102 to independently intake and exhaust air. It can be understood that since the diameter of the first sub-through hole 111 is larger than the diameter of the second sub-through hole 112, the gas flow velocity of the first annular air passage 101 is also greater in this embodiment. The second sub-through hole 112 communicates with the second through hole 221 and further communicates with the second annular air passage 102. Its gas flow path is longer, and the diameter of the second sub-through hole 112 is smaller. Therefore, the gas flow velocity in the second annular air passage 102 is lower than that in the first annular air passage 101, resulting in more vigorous and complete combustion of the flame in the first annular air passage 101, and higher flame combustion stability in the second annular air passage 102. In this embodiment, the gas flow velocity in the second annular air passage 102 is also lower than that in the first embodiment, thus resulting in higher flame stability. The annular partition 15 can specifically be a single, integral annular protrusion structure, or it can be formed by multiple arc-shaped protrusions. These multiple arc-shaped protrusions can be spaced apart or tightly connected, preferably tightly connected.

[0086] Third embodiment:

[0087] like Figures 11 to 12 As shown, in the first structure of this embodiment, the air inlet 103 can be opened at the center of the first bottom wall 11, and the air inlet 103 can be connected to the first annular air passage 101; it can be understood that the air inlet 103 opened at the center of the first bottom wall 11 can first enter the first annular air passage 101, and then enter the second annular air passage 102 from the first annular air passage 101 through the second through hole 221.

[0088] It is understood that in the first structure of this embodiment, the first connecting wall 35 can be provided only between the first sub-cover 10 and the second sub-cover 20, while the second sub-cover 20 and the third sub-cover 30 are still connected by the second boss 23 and the second annular protrusion 34. The first connecting wall 35 can be provided on the bottom wall or side wall of the first sub-cover 10 and the second sub-cover 20. The first connecting wall 35 has a first vent 351 communicating with the first annular air passage 101, so that the gas in the first annular air passage 101 can reach the air outlet 104 through the first vent 351 to achieve gas discharge.

[0089] like Figures 13 to 14As shown, in the second structure of the embodiment, the air inlet hole 103 can be arranged at the center of the first bottom wall 11, and the air inlet hole 103 can be in communication with the first annular air channel 101; a plurality of sub-connection walls 37 can be arranged between the first side wall 12 and the second side wall 22 and between the second side wall 22 and the third side wall 32, and the second gaps 38 are arranged between adjacent sub-connection walls 37, so that the first annular air channel 101 or the second annular air channel 102 can flow through the second gaps 38 between the adjacent sub-connection walls 37.

[0090] It can be understood that, in the second structure of the embodiment, as shown, Figures 13 to 14 a plurality of sub-connection walls 37 can be arranged between the first sub-cover body 10 and the second sub-cover body 20, and the second sub-cover body 20 and the third sub-cover body 30 can still be connected by the second boss 23 and the second annular protrusion 34. The plurality of sub-connection walls 37 can be arranged on the bottom wall or the side wall of the first sub-cover body 10 and the second sub-cover body 20.

[0091] As shown, Figures 15 to 16 in the third structure of the embodiment, the air inlet hole 103 is arranged at the center of the first bottom wall 11, and the air inlet hole 103 can be in communication with the first annular air channel 101 and the second annular air channel 102. It can be understood that, after the gas enters the air inlet hole 103 arranged at the center of the first bottom wall 11, the gas enters the first annular air channel 101 and the second annular air channel 102 at the same time, for example, the air inlet hole 103 is directly in communication with the first annular air channel 101 and the second annular air channel 102.

[0092] Specifically, as shown, Figures 11 to 16As shown, the connection between the first sub-cover 10, the second sub-cover 20, and the third sub-cover 30 in this embodiment can be as follows: a first connecting wall 35 is provided between the first sidewall 12 and the second sidewall 22 to connect the first sidewall 12 and the second sidewall 22; a second connecting wall 36 is provided between the second sidewall 22 and the third sidewall 32 to connect the second sidewall 22 and the third sidewall 32; the first connecting wall 35 has a first vent 351 communicating with the first annular air passage 101, so that the gas in the first annular air passage 101 can reach the air outlet 104 through the first vent 351 to achieve gas discharge; the second connecting wall 36 has a second vent 361 communicating with the second annular air passage 102, so that the gas in the second annular air passage 102 can reach the air outlet 104 through the second vent 361 to achieve gas discharge. That is, when the air inlet 103 is located at the center of the first bottom wall 11, the first sub-cover 10, the second sub-cover 20 and the third sub-cover 30 can be connected on the periphery. For example, connecting walls (the first connecting wall 35, the second connecting wall 36 or the sub-connecting wall 37 mentioned above) are respectively provided between the first side wall 12 and the second side wall 22, and between the second side wall 22 and the third side wall 32. Ventilation holes (first vent 351 or second vent 361) are provided in the connecting walls, or ventilation holes (second gap 38) are formed at intervals in the connecting walls, so as to facilitate the flow of gas in the first annular air passage 101 and the second annular air passage 102.

[0093] In any of the above embodiments, the width of the first annular airway W1 and the width of the second annular airway W2 are both less than or equal to 5 mm, so as to form a narrow gas channel.

[0094] like Figures 1 to 8 As shown, in any of the above embodiments, the first sub-cover 10, the second sub-cover 20, and the third sub-cover 30 can be integrally formed structures or fixedly connected by welding or other methods.

[0095] The first sub-cover 10 and the second sub-cover 20, as well as the second sub-cover 20 and the third sub-cover 30, can also be detachably connected. Detachable connections are preferred to facilitate disassembly, assembly, and maintenance.

[0096] Specifically, one of the first sub-cover body 10 and the second sub-cover body 20 has the first boss 14, and the other has the first annular protrusion 24, the first annular protrusion 24 is matched and connected with the first boss 14, for example, the first boss 14 is clamped in the inside of the first annular protrusion 24, to realize the detachable connection of the two. One of the second sub-cover body 20 and the third sub-cover body 30 has the second boss 23, and the other has the second annular protrusion 34, the second annular protrusion 34 is matched and connected with the second boss 23, for example, the second boss 23 is clamped in the inside of the second annular protrusion 34, to realize the detachable connection of the two, which is simple in structure and convenient to install. In other embodiments, the first sub-cover body 10 and the second sub-cover body 20, and the second sub-cover body 20 and the third sub-cover body 30 can also be connected in a threaded connection, plug-in connection and the like.

[0097] In a specific embodiment, the first bottom wall 11, the second bottom wall 21 and the third bottom wall 31 are all planes and are arranged in parallel to each other, the plane formed airway wall is smoother, so that the air outlet effect is better; the first side wall 12, the second side wall 22 and the third side wall 32 are all arranged obliquely relative to the first bottom wall 11, the second bottom wall 21 and the third bottom wall 31, and the first side wall 12, the second side wall 22 and the third side wall 32 are arranged in parallel to each other. On the one hand, it is convenient for the first sub-cover body 10, the second sub-cover body 20 and the third sub-cover body 30 to be installed, and on the other hand, the first annular airway 101 and the second annular airway 102 can be arranged in parallel and obliquely, thereby facilitating air outlet.

[0098] As shown in Figure 17 The application also provides a stove burner 200, which comprises the central fire cover 100 described in any of the above embodiments. The stove burner 200 can further comprise a mounting bracket 202, an air inlet pipe 204, an outer ring fire cover 201 arranged at the periphery of the central fire cover 100, etc., wherein the center of the mounting bracket 202 has a mixing cavity 203 matched with the first extension 13 of the central fire cover 100, and the top of the mixing cavity 203 can be provided with an inner flame burner (not shown in the figure), and the central fire cover 100 can stabilize the flame of the inner flame burner, prevent the flame from being extinguished, and at the same time improve the combustion quality and efficiency. The periphery of the mixing cavity 203 has a mounting cavity 205 of an outer ring burner (not shown in the figure), and the outer ring fire cover 201 can be arranged on the outer ring burner, thereby improving the combustion quality and efficiency of the outer ring burner. The periphery or bottom of the mounting bracket 202 can further be provided with a supporting leg 2021 to support the mounting bracket 202 and other components mounted thereon. The number of the air inlet pipes 204 can be two, one of which communicates with the mixing cavity 203 of the inner flame burner, and the other of which communicates with the outer ring burner, thereby respectively supplying air to the inner flame burner and the outer ring burner. The stove burner 200 can further comprise other components, which can be flexibly arranged according to the structure of the stove burner 200, and the application does not limit this.

[0099] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model indicated or implied by the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0100] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0101] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0102] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0103] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0104] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A center burner cap for a cooktop burner, characterized by, The center fire cap comprises: a first sub-cover body and a third sub-cover body arranged in a stack; a spacing part arranged between the first sub-cover body and the third sub-cover body; the spacing part separates the first sub-cover body and the third sub-cover body to form a first annular air channel and a second annular air channel arranged adjacently.

2. The center fire primer cup of claim 1 wherein, The first annular air channel and the second annular air channel are arranged along the circumference of the center fire cap, wherein the first annular air channel is arranged outside the second annular air channel; the air outlet directions of the first annular air channel and the second annular air channel are consistent.

3. The center fire cap according to claim 1, wherein: the spacing part is a second sub-cover body, the first sub-cover body and the second sub-cover body form the first annular air channel, and the second sub-cover body and the third sub-cover body form the second annular air channel.

4. The center burner cap of claim 3 wherein, The first sub-cover body has a plurality of first through holes, the first through holes are in communication with the first annular air channel; the second sub-cover body has a plurality of second through holes, the first annular air channel and the second annular air channel are in communication through the second through holes.

5. The center burner cap of claim 4 wherein, The first sub-cover body comprises: a first bottom wall and a first side wall, a plurality of the first through holes are annularly arranged on the first bottom wall.

6. A center burner cap as defined in claim 5 wherein, The first through hole comprises: a first sub-through hole and a second sub-through hole, the first sub-through hole is annularly arranged outside the second sub-through hole, and the diameter of the first sub-through hole is larger than the diameter of the second sub-through hole.

7. A center burner cap as defined in claim 6 wherein, The second sub-cover body comprises a second bottom wall and a second side wall, and the second through hole is annularly arranged on the second bottom wall.

8. The center fire cap according to claim 7, wherein: an annular partition is arranged between the first sub-through hole and the second sub-through hole, and the two ends of the annular partition abut against the first bottom wall and the second bottom wall respectively.

9. The center burner cap of claim 8 wherein, The first sub-through hole is in communication with the first annular air channel, the second sub-through hole is in communication with the second through hole and the second annular air channel in sequence, and the annular partition separates the first annular air channel and the second annular air channel.

10. The center fire primer cover of claim 1 wherein, The first sub-cover body has a first boss, the third sub-cover body has a second annular protrusion, and the first sub-cover body and the third sub-cover body are connected in a plug-in mode through the first boss and the second annular protrusion to realize detachable connection.

11. The center burner cap of claim 10 wherein, The outer side of the first boss or the second annular protrusion has the spacing part, so that the first annular air channel and the second annular air channel are arranged at intervals.

12. The center burner cap of claim 11 wherein, The spacing part is arranged along the circumference of the center fire cap and extends towards the periphery along the first boss or the second annular protrusion.

13. The center burner cap of claim 11 wherein, The spacing part is arranged in parallel with the side wall of the first sub-cover body or the side wall of the third sub-cover body.

14. The center burner cap of claim 5 wherein, The first through hole is arranged at the center of the first bottom wall, and the first through hole is in communication with the first annular air channel; or the first through hole is in communication with the first annular air channel and the second annular air channel.

15. The center burner cap of claim 4 wherein, The second sub-cover body comprises a second bottom wall and a second side wall, the second side wall is arranged obliquely relative to the second bottom wall, and the second through hole is annularly arranged on the second side wall.

16. A center fire primer cover according to any one of claims 1 to 15 wherein, The widths of the first annular air channel and the second annular air channel are less than or equal to 5 mm.

17. A center fire primer cover according to any one of claims 1 to 15 wherein, The first annular air passage and the second annular air passage are arranged in parallel.

18. A center fire primer cover according to any one of claims 1 to 15 wherein, The distance between the center line of the first annular air passage in the depth direction and the center line of the second annular air passage in the depth direction ranges from 3 mm to 8 mm.

19. A cooktop burner, characterized by A center fire cap comprising any one of claims 1 to 18.

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