CN112728541A - Burner for gas stove - Google Patents

Abstract

The invention relates to a burner for a gas stove, which comprises a base; the setting is on the base, has the interior fire lid of ignition/biography fire structure, sets up on the base and sets up in the outlying outer fire lid of interior fire lid equally to the ignition/biography fire structure that corresponds interior fire lid has a biography fire/ignition structure, its characterized in that: the outer fire cover and/or the inner fire cover are/is in a wavy shape staggered with each other, the ignition/fire transmission structure of the inner fire cover is positioned at the inner convex part of the concave-convex structure, correspondingly, the fire transmission/ignition structure of the outer fire cover is positioned at the outer concave part of the concave-convex structure, compared with the prior art, the invention has the advantages that the combustor with the concave-convex structure at least locally arranged on the upper surface of the outer fire cover and/or the inner fire cover and in a wavy shape staggered with each other is provided, so that the internal and external airflows of the outer fire cover and the inner fire cover are not interfered, the effect of uniformly heating the bottom of a pot can be realized, and in addition, the fire transmission can be easier due to the arrangement of the special position of the fire transmission/ignition structure.

Description

Burner for gas stove

Technical Field

The invention relates to the field of household kitchen utensils, in particular to a burner for a gas stove.

Background

At present, a fire cover of a gas stove generally comprises an inner ring fire cover and an outer ring fire cover, the heating mode of the fire cover to a pot body is basically a mode of combining external annular flame and internal annular flame, the inner ring fire cover and the outer ring fire cover are basically a whole circle of fire holes, smoke flows from the center to the outer ring under the condition, the smoke generated by combustion of the inner ring firstly passes through the upper part of the outer ring fire holes and then flows outwards, and therefore the influence of the smoke generated by combustion of the inner ring on the outer ring flame is caused, if the outer ring flame is easily caused to be not attached to the bottom of the pot, the heat exchange is influenced; or the secondary air is not smoothly supplemented due to the flow of the flue gas, resulting in incomplete combustion, so that a new burner structure needs to be developed. In addition, most of the traditional burner fire covers sold in the market are milled with one groove, namely, the top of the fire cover body is milled with one ignition groove, and the burner fire cover is easy to deform due to the fact that the fire cover body is disconnected at the ignition groove, so that the ignition effect is influenced.

For example, a similar fire transfer structure is disclosed in "gas furnace end with fire transfer device and flameout protection function" of chinese utility model patent No. 201220464214.0 (publication No. CN202813375U), wherein the outer ring fire spraying ring is provided with a plurality of outer ring fire spraying holes, and the outer ring fire spraying ring is further provided with an outer ring fire transfer device, the outer ring fire transfer device is composed of a boss arranged on the inner side wall of the outer ring fire spraying ring, an outer ring fire transfer hole and an outer ring fire transfer groove arranged on the boss and the outer ring fire spraying ring, the outer ring fire transfer hole is communicated with the outer ring fire transfer groove, the outer ring fire transfer hole and the outer ring fire transfer groove are communicated with one outer ring fire spraying hole, thereby realizing rapid fire transfer; this pass fire groove of structure is open, it is the linear type to have to pass fire and passes the fire groove promptly and expose at outer ring fire lid surface, the design of this kind has a benefit, it is very abundant exactly to pass the supply of fire inslot secondary air, open pass fire groove can guarantee to pass the supply of secondary air when fire inslot flame burns, be favorable to flame burning and pass fire, the quick characteristics of passing fire have, but open pass fire groove very easily causes to pass fire groove and blocks up, the hot water that flows down from the bottom of a boiler flows into very easily and passes in the fire groove promptly, influence after the jam and pass fire performance, this also is the main reason that current pass fire groove blockked up the maintenance. Finally, in order to avoid bad working conditions such as yellow fire, backfire and the like in the use process of the burner, most of the existing kitchen ranges on the market are provided with a primary air adjustable structure, but the combustion state is influenced by neglecting too much or too little secondary air, so that in conclusion, the existing kitchen range burner still has a great improvement space in anti-blocking performance and cleanness besides the places needing to be improved.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a burner for a gas range capable of preventing the mutual influence of the outer annular flame and the inner annular flame, in view of the above-mentioned prior art.

A second technical problem to be solved by the present invention is to provide a burner for a gas range, which can improve the success rate of flame transfer, in view of the above-mentioned prior art.

The third technical problem to be solved by the present invention is to provide a burner for a gas stove, which can adjust the intake of secondary air to achieve stable combustion, in view of the above-mentioned current state of the art.

In order to solve the first technical problem, the technical scheme adopted by the invention is as follows: the burner for the gas stove comprises

A base;

the inner fire cover is arranged on the base and is provided with an ignition/fire transmission structure;

the outer fire cover is also arranged on the base, is arranged at the periphery of the inner fire cover and is provided with a fire transfer/ignition structure corresponding to the ignition/fire transfer structure of the inner fire cover;

the method is characterized in that:

the upper surface of the outer fire cover and/or the inner fire cover is at least partially provided with a concave-convex structure and is in a wave shape staggered with each other, the ignition/fire transmission structure of the inner fire cover is positioned at the inner convex part of the concave-convex structure, and correspondingly, the fire transmission/ignition structure of the outer fire cover is positioned at the outer concave part of the concave-convex structure.

Because the upper surface of outer fire lid and/or interior fire lid is local at least has concave-convex structure and wholly is the wave form of staggering each other, preferably, have interval distribution and be two at least evagination departments of wave form, each on the upper surface of outer fire lid the evagination department has two at least fire holes of going out, the top of each interior protruding department of interior fire lid is higher than each and corresponds the evagination department outside the fire lid, each the upper surface of evagination department outwards leans out gradually from inside to outside. The inner ring flame formed by the inner ring is prevented from burning to the convex part of the outer fire cover while the uniform heating of the pot bottom is realized, and therefore, the upper surface of the convex part is required to be gradually inclined outwards from inside to outside.

In order to solve the second technical problem, preferably, the inner concave portion of the inner fire cover is only provided with an ignition structure, the ignition structure comprises at least one ignition hole, the aperture of the ignition hole gradually increases according to the section of the air outlet direction, correspondingly, the outer concave portion of the outer fire cover is provided with a fire transfer structure, the fire transfer structure comprises at least one transverse ignition hole which is radially opened, an outer air mixing cavity is formed between the outer fire cover and the base, the bottom of the transverse ignition hole is provided with a through hole communicated with the outer air mixing cavity, and the top of the transverse ignition hole is provided with an air hole communicated with the outside. Because the aperture of ignition hole is according to the cross-section grow gradually of the direction of giving vent to anger, for this has the effect of accelerating gas speed in the inboard opening of ignition hole, and because the cross-section grow gradually of the direction of giving vent to anger, can promote the effect that air and gas that flow into from the air hole mix in the follow ignition hole, provide sufficient gas and air to the ignition hole better to the ignition hole department of interior fire lid can keep stable and even flame, thereby makes the ignition success rate of interior fire lid obtain effectively improving.

In order to avoid the opening of the air hole to enable the overflow liquid to enter the transverse ignition hole, preferably, the outer ignition cover comprises an annular top wall and an outer annular wall extending downwards from the outer edge of the annular top wall in a vertical or inclined manner, the transverse ignition hole is arranged on the annular top wall, the bottom of the transverse ignition hole is further provided with an overflow liquid discharge channel, and a discharge port of the overflow liquid discharge channel is arranged on the outer annular wall. The overflow liquid entering the transverse ignition hole can be effectively discharged through the arrangement of the overflow liquid discharge channel.

Further, the inner fire cover comprises a ring top wall, and an inner air mixing cavity is formed between the inner side edge and the outer side edge of the ring top wall and the inner wall and the outer wall which vertically or obliquely extend downwards, the inner side opening of each ignition hole is communicated with the inner air mixing cavity, and the outer side opening of each ignition hole is formed in the outer wall.

In order to realize that the burner has triple flames from the center to the periphery and further uniformly heats the pot bottom better, preferably, at least two inner fire outlet holes are formed in the inner wall of the inner fire cover at intervals along the circumferential direction, and an air supplement cavity with an upper end and a lower end both open and used for supplementing secondary air to the inner fire outlet holes is formed in the center of the base. In order to avoid the influence of the smoke of the outer ring flame on the supplement of the secondary air when the traditional secondary air is supplemented from the outer periphery to the center, the center part of the base is provided with an air supplement cavity which independently supplements the secondary air to the inner fire outlet. Meanwhile, the concave-convex structure of the inner fire outlet hole combined with the inner fire cover and the outer fire cover has unique effect, particularly, part of smoke of the inner fire cover flows outwards along the concave part of the inner fire outlet hole and is shielded or pressed after passing through the upper surface of the inner convex part of the inner fire cover, so that the inner fire cover is more attached to the bottom of a pot and is beneficial to heat exchange; the smoke generated by the fire outlet holes on the outer convex part of the inner fire cover directly flows outwards from the outer concave part of the outer fire cover and flows out from the outer concave part of the outer fire cover, and preferably, the outer concave part of the outer fire cover also has an inclined surface and can be lifted up, so that the smoke flowing out from the outer concave part and the outer ring fire cannot interfere with each other, and the combustion is facilitated.

To solve the third technical problem, it is preferable that a regulating structure capable of changing the amount of the secondary air is provided in the air supplement chamber. The inner fire outlet hole can have better air supplement amount by adjusting the structure.

In order to realize that the secondary air is supplemented with the air from the outer peripheral air supplement cavity radially, preferably, the base with be provided with the connecting piece between interior fire lid and the outer fire lid, be provided with on the base with interior gas channel that interior fire lid is linked together, be provided with on the base with outer gas channel that outer fire lid is linked together, including the plate body on the connecting piece, the plate body is including two at least centers on the gas transmission body that interior fire lid set up, each gas transmission body is followed the plate body circumference interval sets up and wholly is the spiral radially. The spiral radiation shape of the gas transmission bodies can accelerate external secondary air to flow between the gas transmission bodies and enter the air supplement cavity.

In order to realize that the gas transmission bodies have the function of discharging overflowing liquid besides the function of introducing secondary air, preferably, each gas transmission body comprises an outer side end far away from the inner fire cover and an inner side end close to the inner fire cover, and the plate body is gradually inclined outwards from the inner side end to the outer side end.

In order to achieve that the secondary air can be accelerated and effectively guided to the inner fire outlet when entering the air supplement cavity, preferably, the inner ends of the gas transmission bodies are connected through a connection ring, an inflow port through which external secondary air flows into the air supplement cavity is arranged between the bottom end of the connection ring and the plate body, a through hole through which the adjusting structure penetrates is arranged in the center of the plate body, the inner end edge of the through hole is located at the inner periphery of the connection ring, and the inner end edge of the through hole gradually inclines upwards from outside to inside so as to form a guide part through which the secondary air flows into the air supplement cavity through the inflow port.

Furthermore, the adjusting structure comprises a support connected in the air supplementing cavity, a first air flap arranged on the inner end edge of the through hole and a second air flap which can move relative to the support and passes through the center of the first air flap, a first opening for secondary air to enter is formed between the inner end edge of the through hole and the first air flap, a second opening for secondary air to enter is formed between the first air flap and the second air flap, and the size of the first opening and/or the second opening can be at least changed when the second air flap moves relative to the support. Because the first opening and/or the second opening can be used for secondary air to enter, the secondary air supplementing quantity supplemented to the inner fire outlet in the air supplementing cavity can be effectively adjusted by changing the first opening and/or the second opening.

Furthermore, the second air flap also comprises an air flap rod which can move relative to the support, the position of the air flap rod adjacent to the first air flap is partially provided with a supporting part for supporting the first air flap, the central area of the first air flap is locally provided with a vent hole for secondary air to flow in, the outer diameter of the periphery of the first air flap is smaller than that of the second air flap, wherein secondary air can enter the second opening through the vent hole and then continue to travel up to the area where the inner fire hole is located, the first air flap moves downwards along with the downward movement of the second air flap until the first air flap abuts against the flow guide part, the first opening is in a closed state, and the second opening is in a closed state under the condition that the second air flap can only continuously move relative to the support until the second air flap abuts against the first air flap. The specific adjustment process is as follows: the second air flap is supported by the supporting part of the air supporting door rod all the time, the first air flap moves downwards along with the downward movement of the second air flap, but the first air flap does not abut against the flow guide part, the first opening is reduced, but the second opening still remains unchanged until the first air flap moves downwards to abut against the flow guide part, the first opening is closed, the air inflow of secondary air needs to be changed at the moment, only the second opening can be changed, at the moment, the second air flap only needs to be continuously rotated, at the moment, the second air flap can only continuously move relative to the support, the second opening gradually reduces along with the downward movement of the second air flap until the second opening abuts against the first air flap, and the second opening is in a closed state.

Compared with the prior art, the invention has the advantages that the combustor with the concave-convex structure at least partially arranged on the upper surface of the outer fire cover and/or the inner fire cover and the wavy combustor with the staggered structure as a whole are provided, so that the internal and external airflows of the outer fire cover and the inner fire cover are not interfered, and the boiler bottom can be uniformly heated.

Drawings

FIG. 1 is a schematic view of a burner according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view at an angle of FIG. 1 (showing the first and second openings formed by the first and second flaps in a larger condition);

FIG. 3 is a cross-sectional view at another angle of FIG. 1 (showing the first and second openings formed by the first and second flaps in a condition adjusted to be smaller);

FIG. 4 is a cross-sectional view at yet another angle of FIG. 1 (showing the first and second openings formed by the first and second flaps in a closed position);

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

FIG. 6 is a schematic structural diagram of an inner fire cover in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a connector according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of an outer fire cover in an embodiment of the present invention;

fig. 9 is a cross-sectional view of fig. 8.

Detailed Description

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

As shown in FIGS. 1 to 9, the preferred embodiment of the present invention is shown. The burner for the gas stove in the embodiment comprises a base 1, an inner fire cover 2 which is arranged on the base 1 and is provided with an ignition/fire transmission structure, and an outer fire cover 3 which is also arranged on the base 1, is arranged at the periphery of the inner fire cover 2 and is provided with a fire transmission/ignition structure corresponding to the ignition/fire transmission structure of the inner fire cover 2, wherein the upper surface of the outer fire cover 3 and/or the inner fire cover 2 is at least partially provided with a concave-convex structure and is in a wave shape which is staggered with each other, the ignition/fire transmission structure of the inner fire cover 2 is positioned at the inner convex part 21 of the concave-convex structure, correspondingly, the fire transmission/ignition structure of the outer fire cover 3 is positioned at the outer concave part 31 of the concave-convex structure, the ignition/fire transmission structure of the inner fire cover 2 is positioned at the inner convex part 21 of the concave-convex structure, correspondingly, the fire transmission/ignition structure of the outer fire cover 3 is positioned at the outer concave part 31 of the concave-, according to the common design in the art, it can be seen that the ignition structure can be disposed on the inner fire cover 2 and also on the outer fire cover 3, that is, inside-out fire transfer and outside-in fire transfer can be realized, and correspondingly, the ignition structure can be correspondingly disposed on the inner fire cover 2 and the outer fire cover 3, and this embodiment is described by taking the ignition structure disposed on the inner fire cover 2 and the fire transfer structure disposed on the outer fire cover 3 as an example, wherein the fire transfer structure is preferably disposed on the outer concave portion 31 of the outer fire cover 3, and the ignition structure is disposed on the inner convex portion 21 of the inner fire cover 2, because: when the fire is arranged in the outer concave 31, the air flow is smooth and can not be blocked by the corresponding convex part 32, so that the fire can be easily transmitted under the worse condition.

Because the upper surface of outer fire lid 3 and/or interior fire lid 2 has concave-convex structure and wholly is the wavy combustor of staggering each other at least partially, thereby can realize that the interior outer air current of outer fire lid 3 and interior fire lid 2 is noninterference, can also realize the effect of even heating bottom of a boiler simultaneously, as shown in 8 specifically, have interval distribution and be wavy at least two evaginations 32 on the upper surface of outer fire lid 3, each evagination 32 has at least two fire holes 321 of going out, the top of each interior convexity 21 of interior fire lid 2 is higher than each corresponding evagination 32 of outer fire lid 3, the upper surface of each evagination 32 outwards slopes gradually from inside to outside, still avoid the inner ring flame that the inner ring formed to burn to the evagination 32 of outer fire lid 3 when realizing even heating bottom of a boiler, for this reason, the upper surface of evagination 32 needs outwards slope gradually from inside to outside. The inner concave part 22 of the inner fire cover 2 is only provided with an ignition structure, the ignition structure comprises at least one ignition hole 221, the aperture of the ignition hole 221 is gradually enlarged according to the section of the air outlet direction, correspondingly, the outer concave part 31 of the outer fire cover 3 is provided with a fire transmission structure, the fire transmission structure comprises at least one transverse ignition hole 331 which is radially opened, an outer air mixing cavity 30 is formed between the outer fire cover 3 and the base 1, the bottom of the transverse ignition hole 331 is provided with a through hole 3311 communicated with the outer air mixing cavity 30, and the top of the transverse ignition hole 331 is provided with an air hole 3312 communicated with the outside. Since the aperture of the ignition hole 221 is gradually increased according to the cross section of the gas outlet direction, there is an effect of accelerating the speed of the gas in the inside opening 2211 of the ignition hole 221, and since the cross section of the gas outlet direction is gradually increased, the effect of mixing the gas and the air flowing from the air hole 3312 in the ignition hole 221 can be promoted, and sufficient gas and air can be better provided to the ignition hole 221, so that the ignition hole 221 of the inner fire cover 2 can maintain stable and uniform flame, and the ignition success rate of the inner fire cover 2 can be effectively improved. In order to avoid the phenomenon that only one ignition hole 221 is arranged and ignition failure easily occurs under the condition of blockage by overflowing liquid, two ignition holes 221 are arranged and distributed at intervals up and down, and a flame stabilizing groove 220 is also arranged between the upper ignition hole 221 and the lower ignition hole 221. Similarly, in order to prevent the air holes 3312 from being opened so that the overflowing liquid enters the transverse ignition hole 331, it is preferable that the outer fire cover 3 includes an annular top wall 33 and an outer annular wall 34 extending vertically or obliquely downward from an outer edge of the annular top wall 33, the transverse ignition hole 331 is disposed on the annular top wall 33, the bottom of the transverse ignition hole 331 is further provided with an overflowing liquid discharging passage 35, and the discharge port 351 of the overflowing liquid discharging passage 35 is opened on the outer annular wall 34. The overflow entering the lateral ignition hole 331 can be effectively discharged by the arrangement of the overflow path 35.

As shown in fig. 6, the inner fire cover 2 includes a ring top wall 23, and an inner wall 24 and an outer wall 25 extending vertically or obliquely downward from the inner edge and the outer edge of the ring top wall 23, an inner air mixing chamber 20 is formed between the inner wall and the outer wall, an inner opening 2211 of each ignition hole 221 is communicated with the inner air mixing chamber 20, and an outer opening 2212 of each ignition hole 221 is opened on the outer wall 25. In order to realize that the burner has triple flames from the center to the periphery and further uniformly heats the bottom of the pan, preferably, at least two inner fire outlets 241 are formed in the inner wall 24 of the inner fire cover 2 at intervals along the circumferential direction, and the central part of the base 1 is provided with an air supplement cavity 11 which is open at the upper end and the lower end and is used for supplementing secondary air to the inner fire outlets 241. In order to avoid the influence of the smoke of the outer ring flame on the supplement of the secondary air when the traditional secondary air is supplemented from the outer periphery to the center, the central part of the base 1 is provided with an air supplement cavity 11 which independently supplements the secondary air to the inner fire outlet 241. Meanwhile, the concave-convex structure of the inner fire outlet 241 combined with the inner fire cover 2 and the outer fire cover 3 has a unique effect, specifically, as follows, part of the smoke of the inner fire cover 2 moves to flow outwards along the inner concave part 22 of the inner fire outlet 241 and is shielded or pressed after passing through the upper surface of the inner convex part 21 of the inner fire cover 2, so that the smoke is more attached to the bottom of a pot and is beneficial to heat exchange; the smoke generated by the fire outlet holes on the outer convex part 32 of the inner fire cover 2 directly flows outwards from the outer concave part 31 of the outer fire cover 3 and flows out through the outer concave part 31 of the outer fire cover 3, and here, preferably, the outer concave part 31 of the outer fire cover 3 also has an inclined surface and can be lifted up, so that the smoke flowing out from the outer concave part 31 and the outer fire cannot interfere with each other, and the combustion is facilitated.

In order to better supplement the secondary air to the inner fire outlet 241, the air supplement chamber 11 is provided with an adjusting structure 5 capable of changing the amount of the secondary air, and the inner fire outlet 241 can have a better air supplement amount through the arrangement of the adjusting structure 5. Wherein, be provided with connecting piece 4 between base 1 and interior fire lid 2 and the outer fire lid 3, be provided with on the base 1 and cover 2 the interior gas channel 12 that is linked together with interior fire, be provided with the outer gas channel 13 that is linked together with outer fire lid 3 on the base 1, including plate body 41 on the connecting piece 4, plate body 41 is including at least two gas transmission body 42 that set up around interior fire lid 2, each gas transmission body 42 sets up and wholly is the spiral radially along plate body 41 circumference interval, connect 4 concrete structure can refer to figure 7. The spiral radiation shape of the gas transmission body 42 can accelerate the external secondary air to flow between the gas transmission bodies 42 and enter the air supplement cavity 11, and the secondary air is supplemented to the air supplement cavity 11 from the outer periphery in the radial direction. In order to realize that the gas transmission bodies 42 have the function of discharging the overflowing liquid besides the function of introducing the secondary air, each gas transmission body 42 comprises an outer end 421 far away from the inner fire cover 2 and an inner end 422 near the inner fire cover 2, and the plate body 41 is gradually inclined outwards from the inner end 422 to the outer end 421. The inner end 422 of each gas transmission body 42 is connected by a connecting ring 500, an inflow 5001 for external secondary air to flow into the air supplement chamber is arranged between the bottom end of the connecting ring 500 and the plate body 41, the center of the plate body 41 is provided with a through hole 411 for the adjusting structure 5 to penetrate, the inner end edge of the through hole 411 is positioned at the inner periphery of the connecting ring 500, the inner end edge of the through hole 411 is gradually inclined upwards from outside to inside so as to form a flow guide part 4111 for the secondary air to flow into the air supplement chamber through the inflow 5001, the inflow 5001 and the flow guide part 4111 jointly play a role of accelerating the secondary air when entering the air supplement chamber 11 and effectively guiding the secondary air to an inner fire outlet 241, the adjusting structure 5 comprises a support 51 connected in the air supplement chamber 11, a first air flap 52 arranged on the inner end edge of the through hole 411 and a second air flap 53 capable of moving relative to the support 51 and passing through the center of the first air, a first opening 54 through which secondary air enters is formed between the inner end edge of the through hole 411 and the first flap 52, a second opening 55 through which secondary air enters is formed between the first flap 52 and the second flap 53, and at least the size of the first opening 54 and/or the second opening 55 can be changed in a state where the second flap 53 is moved relative to the holder 51. Since the first opening 54 and/or the second opening 55 can be supplied with the secondary air, for this reason, the amount of the secondary air supplemented to the inner fire outlet 241 in the air supplementing chamber can be effectively adjusted by changing the first opening 54 and/or the second opening 55. Specifically, the second air flap 53 further includes an air flap rod 56 capable of moving relative to the support 51, a support portion 561 for supporting the first air flap 52 is partially arranged at a position of the air flap rod 56 adjacent to the first air flap 52, a vent hole 521 for inflow of secondary air is partially arranged in a central area of the first air flap 52, an outer diameter of a periphery of the first air flap 52 is smaller than that of the second air flap 53, wherein the secondary air can enter the second opening 55 through the vent hole 521 and then continuously move up to an area where the inner fire outlet 241 is located, the first air flap 52 moves down along with downward movement of the second air flap 53 until the first air flap 52 abuts against the flow guide portion 4111, the first opening 54 is in a closed state, and the second opening 55 is in a closed state in a state that the second air flap 53 can only move relative to the support 51 by itself until the second air flap 52 abuts against the first air flap 52.

Referring to fig. 2 to 5, the path of the secondary air entering the air supplement chamber 11 to continue to supplement upward to the area of the inner fire hole 241 is as follows (refer to the solid arrow part of the dotted line): firstly, the secondary air flows into the area of the inner fire outlet 241 along the gas transmission body 42 through the inflow port 51 along the radial direction; secondly, the secondary air passes through the first opening 54 and the second opening 55 from bottom to top along the air supplement chamber 11 and is supplemented to the area of the inner fire outlet 241, and how to adjust the first opening 54 and the second opening 55 to adjust the secondary air quantity is specifically as follows: since the second shutter 53 is always supported by the support portion 561 of the support shutter lever 56, when the first shutter 52 moves downward with the downward movement of the second shutter 53, however, in the condition that the first damper blade 52 does not abut against the deflector 4111, the first opening 54 is made smaller, the second opening 55 is still maintained until the first damper sheet 52 moves down to abut against the deflector 4111, the first opening 54 is closed, and the amount of intake of secondary air needs to be changed, only by changing the second opening 55, at this time, only the second air flap 53 needs to be rotated continuously, the second air flap 53 can be rotated by virtue of the adjusting part 57 at the lower end of the second air flap 53, at this time, the second air flap 53 can only move relative to the support 51 continuously, the second opening 55 gradually becomes smaller along with the downward movement of the second air flap 53, and until the second opening 55 is in a closed state in a state of abutting against the first air flap 52; meanwhile, the supplementary path of the secondary air is reversed and can also be used as a discharge channel of the overflowing liquid (refer to the dotted hollow arrow part), when the overflowing liquid generated in the cooking process flows through the first air flap 52, because the outer diameter of the first air flap 52 is smaller than that of the second air flap 53, the overflowing liquid can flow through the second air flap 53 through the first air flap 52 from top to bottom, then flows to the interval of the gas transmission body 42 and is discharged outside the burner.

Claims (12)

1. A burner for gas stove comprises

A base (1);

the inner fire cover (2) is arranged on the base (1) and is provided with an ignition/fire transmission structure;

the outer fire cover (3) is also arranged on the base (1), is arranged at the periphery of the inner fire cover (2), and has a fire transmitting/igniting structure corresponding to the igniting/fire transmitting structure of the inner fire cover (2);

the method is characterized in that:

the upper surface of the outer fire cover (3) and/or the inner fire cover (2) is at least partially provided with a concave-convex structure and is in a wave shape staggered with each other, the ignition/fire transmission structure of the inner fire cover (2) is positioned at an inner convex part (21) of the concave-convex structure, and correspondingly, the fire transmission/ignition structure of the outer fire cover (3) is positioned at an outer concave part (31) of the concave-convex structure.

2. Burner for gas cooktops according to claim 1, characterized in that: have interval distribution and be wavy two at least evagination department (32) on the upper surface of outer fire lid (3), each evagination department (32) have two at least fire holes (321) of going out, the top of each evagination department (21) of interior fire lid (2) is higher than each and corresponds evagination department (32) outside fire lid (3), each the upper surface of evagination department (32) outwards leans out gradually from inside to outside.

3. Burner for gas cooktops according to claim 2, characterized in that: the inner concave part (22) of the inner fire cover (2) is only provided with an ignition structure, the ignition structure comprises at least one ignition hole (221), the aperture of the ignition hole (221) is gradually enlarged according to the section of the air outlet direction, correspondingly, an outer concave part (31) of the outer fire cover (3) is provided with a fire transfer structure, the fire transfer structure comprises at least one transverse ignition hole (331) which is radially opened, an outer air mixing cavity (30) is formed between the outer fire cover (3) and the base (1), the bottom of the transverse ignition hole (331) is provided with a through hole (3311) which is communicated with the outer air mixing cavity (30), and the top of the transverse ignition hole (331) is provided with an air hole (3312) which is communicated with the outside.

4. Burner for gas cooktops according to claim 3, characterized in that: the outer fire cover (3) comprises an annular top wall (33) and an outer annular wall (34) extending downwards from the outer edge of the annular top wall (33) in a vertical or inclined mode, the transverse ignition hole (331) is formed in the annular top wall (33), a overflowing liquid discharging channel (35) is further arranged at the bottom of the transverse ignition hole (331), and a discharging port (351) of the overflowing liquid discharging channel (35) is formed in the outer annular wall (34).

5. Burner for gas cooktops according to claim 3 or 4, characterized in that: the inner fire cover (2) comprises a ring top wall (23), and inner air mixing cavities (20) formed between inner walls (24) and outer walls (25) vertically or obliquely extending downwards from the inner side edge and the outer side edge of the ring top wall (23), inner side openings (2211) of the ignition holes (221) are communicated with the inner air mixing cavities (20), and outer side openings (2212) of the ignition holes (221) are formed in the outer walls (25).

6. Burner for gas cooktops according to claim 5, characterized in that: the inner wall (24) of the inner fire cover (2) is provided with at least two inner fire outlet holes (241) at intervals along the circumferential direction, and the center part of the base (1) is provided with an air supplement cavity (11) which is provided with an upper end and a lower end which are both open and used for supplementing secondary air to the inner fire outlet holes (241).

7. Burner for gas cooktops according to claim 6, characterized in that: an adjusting structure (5) capable of changing the amount of secondary air is arranged in the air supplementing cavity (11).

8. Burner for gas cooktops according to claim 7, characterized in that: base (1) with be provided with connecting piece (4) between interior fire lid (2) and the outer fire lid (3), be provided with on base (1) with interior gas channel (12) that interior fire lid (2) are linked together, be provided with on base (1) with outer gas channel (13) that outer fire lid (3) are linked together, including plate body (41) on connecting piece (4), plate body (41) center on including at least two gas transmission body (42) that interior fire lid (2) set up, each gas transmission body (42) are followed plate body (41) circumference interval sets up and wholly is the spiral radially.

9. Burner for gas cooktops according to claim 8, characterized in that: each gas transmission body (42) comprises an outer side end (421) far away from the inner fire cover (2) and an inner side end (422) close to the inner fire cover (2), and the plate body (41) is gradually inclined outwards from the inner side end (422) to the outer side end (421).

10. Burner for gas cooktops according to claim 9, characterized in that: the inner side ends (422) of the gas transmission bodies (42) are connected through a connecting ring (500), an inflow port (5001) for external secondary air to flow into the air supplement cavity is arranged between the bottom end of the connecting ring (500) and the plate body (41), a through hole (411) for the adjusting structure (5) to penetrate is formed in the center of the plate body (41), the inner end edge of the through hole (411) is located on the inner periphery of the connecting ring (5), and the inner end edge of the through hole (411) is gradually inclined upwards from outside to inside so as to form a flow guide part (4111) for the secondary air to flow into the air supplement cavity through the inflow port (5001).

11. Burner for gas cooktops according to claim 10, characterized in that: the adjusting structure (5) comprises a support (51) connected in the air supplementing cavity (11), a first air flap (52) arranged on the inner end edge of the through hole (411) and a second air flap (53) capable of moving relative to the support (51) and penetrating through the center of the first air flap (52), a first opening (54) for secondary air to enter is formed between the inner end edge of the through hole (411) and the first air flap (52), a second opening (55) for secondary air to enter is formed between the first air flap (52) and the second air flap (53), and the size of the first opening (54) and/or the second opening (55) can be changed at least under the condition that the second air flap (53) moves relative to the support (51).

12. Burner for gas cooktops according to claim 11, characterized in that: the second air flap (53) further comprises an air flap rod (56) capable of moving relative to the support (51), a support part (561) for supporting the first air flap (52) is arranged on a position, adjacent to the first air flap (52), of the air flap rod (56), a ventilation hole (521) for inflow of secondary air is arranged on a part of a central area of the first air flap (52), the outer diameter of a periphery of the first air flap (52) is smaller than that of the second air flap (53), wherein the secondary air can enter the second opening (55) through the ventilation hole (521) and then continuously ascend to an area where the inner fire outlet hole (241) is located, the first air flap (52) moves downwards along with the downward movement of the second air flap (53) until the first air flap (52) abuts against the flow guide part (4111), and the first opening (54) is in a closed state, the second opening (55) is closed in the state in which the second flap (53) can only continue to move relative to the support (51) by itself until it abuts against the first flap (52).

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