CN112728541B

CN112728541B - A burner for a gas stove

Info

Publication number: CN112728541B
Application number: CN202110018688.6A
Authority: CN
Inventors: 柯情; 刘晓刚; 王帅东; 叶佳辉
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-01-07
Filing date: 2021-01-07
Publication date: 2025-02-18
Anticipated expiration: 2041-01-07
Also published as: CN112728541A

Abstract

The present invention relates to a burner for a gas stove, comprising a base; an inner fire cover arranged on the base and having an ignition/fire transfer structure, an outer fire cover also arranged on the base and arranged on the periphery of the inner fire cover, and a fire transfer/ignition structure corresponding to the ignition/fire transfer structure of the inner fire cover, characterized in that: the outer fire cover and/or the inner fire cover are in a mutually staggered wavy shape as a whole, the ignition/fire transfer structure of the inner fire cover is located at the inner convex part of its concave-convex structure, and correspondingly, the fire transfer/ignition structure of the outer fire cover is located at the outer concave part of its concave-convex structure. Compared with the prior art, the advantage of the present invention is to provide a burner in which the upper surface of the outer fire cover and/or the inner fire cover at least partially has a concave-convex structure and is in a mutually staggered wavy shape as a whole, so that the internal and external airflows of the outer fire cover and the inner fire cover do not interfere with each other, and the effect of uniformly heating the bottom of the pot can be achieved. In addition, the special position setting of the fire transfer/ignition structure can make it easier to transfer fire.

Description

Burner for gas stove

Technical Field

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

Background

At present, a fire cover of a gas cooker generally comprises an inner ring fire cover and an outer ring fire cover, wherein the heating mode of the fire cover on a cooker body is basically a mode of combining outer annular flame and inner annular flame, and the inner ring fire cover and the outer ring fire cover are basically a whole circle of fire holes, under the condition that flue gas flows from the center to the outer ring, the flue gas generated by inner ring combustion firstly passes through the upper part of the outer ring fire holes and then flows outwards, so that the influence of the flue gas generated by inner ring combustion on the outer ring flame is caused, for example, the outer ring flame cannot be attached to the cooker bottom easily, heat exchange is influenced, or secondary air supplement is not smooth due to the flue gas flow, and incomplete combustion is caused, so that a new burner structure needs to be developed. In addition, most of the traditional burner fire covers sold in the market are formed by milling a groove, namely, a igniting groove is formed in the top of the fire cover body, and the fire cover body of the burner is disconnected at the igniting groove, so that the fire cover body is easy to deform, and the igniting effect is affected.

A Chinese patent with a flame transmitting device and flame-out protection function, such as a Chinese patent with a patent number 201220464214.0 (publication number CN 202813375U), discloses a similar flame transmitting structure, wherein a plurality of outer ring flame-out holes are arranged on an outer ring flame-out ring, and an outer ring flame-out device is also arranged on the outer ring flame-out ring, the outer ring flame-out device consists of a boss arranged on the inner side wall of the outer ring flame-out ring, an outer ring flame-out hole arranged on the boss and the outer ring flame-out ring, and an outer ring flame-out groove, the outer ring flame-out hole is communicated with the outer ring flame-out groove, the outer ring flame-out hole and the outer ring flame-out groove are communicated with one outer ring flame-out hole, so that quick flame transmission can be realized. Finally, in order to avoid bad working conditions such as Huang Huo and tempering, etc. of the burner in the use process, most of the existing cookers on the market have a structure with adjustable primary air, but too much or too little secondary air is ignored and the combustion state is influenced, therefore, in addition to the places needing to be improved, the existing cookers still have a great room for improvement in anti-blocking performance and cleanliness.

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 avoiding the interaction of an external annular flame and an internal annular flame, in view of the state of the art described above.

The second technical problem to be solved by the present invention is to provide a burner for a gas stove capable of improving the fire transfer power against the state of the 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 air intake amount of secondary air to realize stable combustion, aiming at the state of the art.

In order to solve the first technical problem, the invention adopts the technical proposal that the burner for the gas stove comprises

A base;

An inner fire cover arranged above the base and provided with an ignition/fire transmission structure;

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

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 concave-convex structures and is in a wave shape which is staggered with each other integrally, and 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 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 which is staggered with each other integrally, preferably, the upper surface of the outer fire cover is provided with at least two outer convex parts which are distributed at intervals and are in a wave shape, each outer convex part is provided with at least two outgoing fire holes, the top of each inner convex part of the inner fire cover is higher than each corresponding outer convex part of the outer fire cover, and the upper surface of each outer convex part is gradually inclined outwards from inside to outside. The inner ring flame formed by the inner ring is prevented from burning to the outer convex part of the outer fire cover while the pot bottom is uniformly heated, and therefore, the upper surface of the outer convex part is required to be gradually inclined outwards from inside to outside.

In order to solve the second technical problem, preferably, the inner recess 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 becomes larger according to the section of the air outlet direction, correspondingly, the outer recess 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 opened along the radial direction, 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 which is communicated with the outer air mixing cavity, and the top of the transverse ignition hole is provided with an air hole which is communicated with the outside. The aperture of the ignition hole is gradually enlarged according to the section in the air outlet direction, so that the effect of accelerating the gas speed is achieved in the inner opening of the ignition hole, and the effect of mixing the air flowing from the air hole into the ignition hole with the gas can be promoted, so that sufficient gas and air are better provided for the ignition hole, stable and uniform flame can be kept at the ignition hole of the inner fire cover, and the ignition success rate of the inner fire cover is effectively improved.

In order to avoid the overflow from entering the transverse ignition hole due to the opening of the air hole, preferably, the outer fire cover comprises an annular top wall and an outer annular wall extending downwards vertically or obliquely from the outer side edge of the annular top wall, the transverse ignition hole is arranged on the annular top wall, the bottom of the transverse ignition hole is also provided with an overflow discharging channel, and the discharge outlet of the overflow discharging 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 discharging channel.

Further, the inner fire cover comprises a ring top wall, and an inner mixing cavity formed between an inner wall and an outer wall which extend vertically or obliquely downwards from the inner side edge and the outer side edge of the ring top wall, wherein an inner opening of each ignition hole is communicated with the inner mixing cavity, and an outer 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 the bottom of the pan is heated uniformly, preferably, the inner wall of the inner fire cover is provided with at least two inner fire outlets at intervals along the circumferential direction, and the center part of the base is provided with an air supplementing cavity which is open at the upper end and the lower end and is used for supplementing secondary air to the inner fire outlets. In order to avoid the influence of the flue gas of the outer ring flame on the secondary air supplement when the traditional secondary air is supplemented from the center of the periphery, the center part of the base is provided with an air supplementing cavity for supplementing the secondary air by independently and inwards discharging fire holes. The inner fire hole combines the concave-convex structure of the inner fire cover and the outer fire cover, and the smoke flowing out of the concave-convex structure of the inner fire cover is blocked or pressed by the smoke flowing out of the concave-convex structure of the inner fire cover after passing through the upper surface of the inner convex part of the inner fire cover, so that the smoke is more fit with the bottom of the pot, heat exchange is facilitated, the smoke generated by the fire hole of the inner fire cover on the outer convex part directly flows out of the outer concave part of the outer fire cover, and the outer concave part of the outer fire cover is preferably provided with an inclined plane, and can be lifted.

To solve the third technical problem, preferably, an adjusting structure capable of changing the secondary air amount is provided in the air supplementing chamber. The arrangement of the adjusting structure can enable the inner fire outlet to have better air supplementing quantity.

In order to realize that secondary air is supplemented the air by radially from outer circumference air supply chamber, preferably, the base with be provided with the connecting piece between inner fire lid and the outer fire lid, be provided with on the base with the internal combustion gas passageway that the inner fire lid is linked together, be provided with on the base with the outer gas passageway that the outer fire lid is linked together, including the plate body on the connecting piece, the plate body is including at least two around the gas transmission body that the inner fire lid set up, each gas transmission body is followed plate body circumference interval sets up and wholly is spiral radial. The spiral shape of the gas transfer bodies can accelerate the flow of external secondary air into the space between the gas transfer bodies and into the air supplementing cavity.

In order to achieve the effect of the gas transfer bodies in addition to the effect of the secondary air introduction, it is preferable that each of the gas transfer bodies includes an outer end remote from the inner fire cover, an inner end adjacent to the inner fire cover, and the plate body is inclined gradually outwardly from the inner end to the outer end.

In order to achieve that secondary air can be accelerated and effectively guided to the inner fire outlet when entering the air supplementing cavity, preferably, the inner end of each gas transmission body is connected through a connecting ring, an inflow opening for allowing external secondary air to flow into the air supplementing cavity is arranged between the bottom end of the connecting ring and the plate body, a through hole for allowing the adjusting structure to penetrate is formed in the center of the plate body, the inner end edge of the through hole is located on the inner periphery of the connecting ring, and the inner end edge of the through hole gradually inclines upwards from outside to inside to form a guide part for allowing secondary air to flow into the air supplementing cavity through the inflow opening.

Further, 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 capable of moving relative to the support and penetrating through the center of the first air flap, a first opening for entering secondary air is formed between the inner end edge of the through hole and the first air flap, a second opening for entering secondary air 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 under the state that the second air flap moves relative to the support. Because the first opening and/or the second opening can be used for allowing secondary air to enter, the secondary air supplementing quantity in the air supplementing cavity, which is supplemented to the inner fire outlet hole, can be effectively regulated by changing the first opening and/or the second opening.

Further, the second air flap further comprises an air flap rod capable of moving relative to the support, a supporting part for supporting the first air flap is locally arranged at a position, adjacent to the first air flap, of the air flap rod, a vent hole for allowing secondary air to flow in is locally arranged at a central area of the first air flap, the outer diameter of the periphery of the first air flap is smaller than that of the second air flap, secondary air can enter the second opening through the vent hole and then continuously ascend to the area where the inner fire outlet 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 guiding part, the first opening is in a closed state, and the second air flap can only continuously move relative to the support until the second air flap abuts against the first air flap. The second air flap is supported by the supporting part of the supporting air flap rod all the time, the first air flap moves downwards along with the downward movement of the second air flap, the first opening is smaller on the premise that the first air flap does not abut against the diversion part, the second opening is still unchanged until the first air flap moves downwards to abut against the diversion part, the first opening is closed, the air inflow of secondary air is required to be changed, only the second opening is required to be changed, only the second air flap is required to be continuously rotated, at the moment, the second air flap can only move relative to the supporting seat, the second opening gradually becomes smaller along with the downward movement of the second air flap, and the second opening is in a closed state until the second opening abuts against the first air flap.

Compared with the prior art, the invention has the advantages that the upper surface of the outer fire cover and/or the inner fire cover is provided with the concave-convex structure at least partially and is a wave-shaped burner which is staggered with each other integrally, so that the inner and outer air flows of the outer fire cover and the inner fire cover are not interfered, the effect of uniformly heating the bottom of the pot can be realized, in addition, the ignition/fire transmission structures of the inner fire cover and the outer fire cover are corresponding, especially when the fire transmission is arranged in the concave position, the air flows are smooth and can not be blocked by the corresponding convex part, and the fire can be transmitted more easily under more severe conditions.

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 state);

FIG. 3 is another angular cross-sectional view of FIG. 1 (showing the first and second openings formed by the first and second flaps in a reduced state after being adjusted);

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

FIG. 5 is a schematic diagram of an adjusting structure according to an embodiment of the present invention;

FIG. 6 is a schematic view of the inner fire cover according to the embodiment of the invention;

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

FIG. 8 is a schematic view of the structure of an outer fire cover according to 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 embodiments of the drawings.

As shown in fig. 1 to 9, the present invention is a preferred embodiment. The burner for a gas cooker in this embodiment comprises a base 1, an inner fire cover 2 arranged above the base 1 and having a fire ignition/transmission structure, and an outer fire cover 3 arranged on the periphery of the inner fire cover 2 and having a fire transmission/ignition structure corresponding to the fire ignition/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 has at least partially a concave-convex structure and is in a wave shape which is staggered with each other as a whole, the fire ignition/transmission structure of the inner fire cover 2 is positioned at an inner convex part 21 of the concave-convex structure, 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, wherein the fire ignition/transmission structure of the inner fire cover 2 is positioned at an inner convex part 21 of the concave-convex structure, correspondingly, the fire transmission/ignition structure of the outer fire cover 3 is located in the outer concave part 31 of the concave-convex structure, as known in the common design manner in the field, the ignition structure can be arranged on the inner fire cover 2 and the outer fire cover 3, namely, the fire transmission from inside to outside can be realized, and the fire transmission structure can be correspondingly arranged in the inner fire cover 2 and the outer fire cover 3 from outside to inside, the embodiment takes the ignition structure arranged on the inner fire cover 2, the fire transmission structure is arranged on the outer fire cover 3 as an example for unfolding description, wherein the fire transmission structure is preferably arranged on the outer concave part 31 of the outer fire cover 3, and the ignition structure is arranged on the inner convex part 21 of the inner fire cover 2, and the reason is that: when the fire is transmitted in the outer concave 31, the air flow is smooth, and the fire cannot be blocked by the corresponding outer convex 32, so that the fire can be transmitted more easily under more severe conditions.

The upper surface of the outer fire cover 3 and/or the inner fire cover 2 is provided with at least partially concave-convex structures and is a wave-shaped burner which is staggered with each other, so that the inner and outer airflows of the outer fire cover 3 and the inner fire cover 2 are not disturbed, and the effect of uniformly heating the pot bottom can be realized, particularly, as shown in fig. 8, the upper surface of the outer fire cover 3 is provided with at least two convex parts 32 which are distributed at intervals and are wave-shaped, each convex part 32 is provided with at least two outgoing fire holes 321, the top of each inner convex part 21 of the inner fire cover 2 is higher than the outer convex part 32 of each corresponding outer fire cover 3, the upper surface of each convex part 32 is gradually inclined outwards from inside to outside, and the inner annular flame formed by the inner ring is prevented from burning to the convex part 32 of the outer fire cover 3 when the pot bottom is uniformly heated. The inner recess 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 recess 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 opened along the radial direction, an outer mixing cavity 30 is formed between the outer fire cover 3 and the base 1, a through hole 3311 which is communicated with the outer mixing cavity 30 is opened at the bottom of the transverse ignition hole 331, and an air hole 3312 which is communicated with the outside is opened at the top of the transverse ignition hole 331. Since the aperture of the ignition hole 221 is gradually enlarged according to the section of the outlet direction, for this reason, there is an effect of accelerating the gas velocity in the inner side opening 2211 of the ignition hole 221, and since the section of the outlet direction is gradually enlarged, the effect of mixing the air flowing from the air hole 3312 in the ignition hole 221 with the gas can be promoted, sufficient gas and air can be better supplied to the ignition hole 221, so that the ignition hole 221 of the inner fire cover 2 can maintain a 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 is easy to happen under the condition of being blocked by overflow liquid, the ignition holes 221 can be arranged in two and vertically distributed at intervals, and flame stabilizing grooves 220 are arranged between the upper ignition hole 221 and the lower ignition hole 221. Similarly, in order to avoid the overflow from entering the transverse ignition hole 331 due to the opening of the air hole 3312, the outer fire cover 3 preferably includes an annular top wall 33 and an outer annular wall 34 extending vertically or obliquely downward from the 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 overflow drain channel 35, and the drain outlet 351 of the overflow drain channel 35 is disposed on the outer annular wall 34. The overflow entering the transverse fire hole 331 can be effectively discharged by the arrangement of the overflow discharge passage 35.

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

In order to better supplement secondary air to the inner fire hole 241, an adjusting structure 5 capable of changing secondary air quantity is arranged in the air supplementing cavity 11, and the inner fire hole 241 can have better air supplementing quantity 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 with the internal combustion gas passageway 12 that is linked together of interior fire lid 2, be provided with on the base 1 with the outer gas passageway 13 that is linked together of outer fire lid 3, including plate body 41 on the connecting piece 4, plate body 41 is including at least two gas transmission bodies 42 that set up around interior fire lid 2, each gas transmission body 42 sets up and wholly is the spiral radial along plate body 41 circumference interval, the specific structure of connecting 4 can refer to fig. 7. The spiral shape of the fuel gas transport bodies 42 can accelerate the inflow of external secondary air between the fuel gas transport bodies 42 and into the air replenishment chamber 11, achieving replenishment of the secondary air by the radially outer circumferential air replenishment chamber 11. In order to achieve the effect of the gas transfer bodies 42 of draining in addition to the effect of the introduction of secondary air, each gas transfer body 42 comprises an outer end 421 remote from said inner fire cover 2, an inner end 422 adjacent to the inner fire cover 2, the plate 41 being inclined gradually outwards from this 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 port 5001 for allowing external secondary air to flow into the air supplementing cavity is arranged between the bottom end of the connecting ring 500 and the plate 41, a through hole 411 for allowing an adjusting structure 5 to penetrate is arranged in the center of the plate 41, 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 gradually inclines upwards from outside to inside so as to form a flow guiding part 4111 for allowing secondary air to flow into the air supplementing cavity through the inflow port 5001, the inflow port 5001 and the flow guiding part 4111 together play a role of enabling secondary air to be accelerated and effectively guided to the inner fire outlet 241 when entering the air supplementing cavity 11, and the adjusting structure 5 comprises a support 51 connected in the air supplementing cavity 11, the first flap 52 provided on the inner end of the through hole 411 and the second flap 53 movable relative to the support 51 and penetrating the center of the first flap 52, a first opening 54 through which secondary air enters is formed between the inner end of the through hole 411 and the first flap 52, and 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 in which the second flap 53 is moved relative to the support 51. Since the first opening 54 and/or the second opening 55 are each provided with the secondary air, the secondary air replenishment amount in the air replenishment chamber, which is replenished to the inner flame hole 241, can be effectively regulated by changing the first opening 54 and/or the second opening 55. Specifically, the second air flap 53 further includes an air flap lever 56 capable of moving relative to the support 51, a supporting portion 561 for supporting the first air flap 52 is locally provided at a position of the air flap lever 56 adjacent to the first air flap 52, a ventilation hole 521 for allowing secondary air to flow in is locally provided at a central region 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 secondary air can enter the second opening 55 through the ventilation hole 521 and then further move up to a region of the inner fire hole 241, the first air flap 52 moves down with the downward movement of the second air flap 53 until the first air flap 52 abuts against the guide portion 4111, the first opening 54 is in a closed state, and the second air flap 53 can only move itself continuously relative to the support 51 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 supply chamber 11 continuing upward supply to the inner flame hole 241 area is one of (refer to the solid arrow portion of the broken line) the secondary air flowing into the inner flame hole 241 area in the radial direction through the inflow port 51 along the gas transmission body 42; secondly, secondary air is upwardly replenished to the inner fire hole 241 area along the air replenishing cavity 11 from bottom to top through the first opening 54 and the second opening 55, and specifically how to adjust the first opening 54 and the second opening 55 to further adjust the secondary air amount is specifically as follows, because the second air flap 53 is always supported by the supporting part 561 of the supporting air flap rod 56, when the first air flap 52 moves downwards along with the downward movement of the second air flap 53, but the first opening 54 is smaller on the premise that the first air flap 52 does not abut against the guide part 4111, but the second opening 55 still remains unchanged until the first air flap 52 moves downwards to abut against the guide part 4111, the first opening 54 is closed, at this time, the secondary air inflow amount needs to be changed only by changing the second opening 55, at this time, only the second air flap 53 needs to continue to rotate, the second air flap 53 can rotate by means of the adjusting part 57 at the lower end of the second air flap 53, and the second air flap 53 can only continue to move relative to the supporting seat 51, but the second air flap 53 moves gradually along with the downward movement of the second air flap 53 until the second opening 55 abuts against the second air flap 55 is gradually closed until the second opening 55 is closed; meanwhile, the supplementary path of the secondary air, which is the reverse, can also be used as a discharge passage (refer to the portion of the dotted line with the open arrow), when the overflow generated during cooking flows through the first flap 52, since the outer diameter of the first air flap 52 is smaller than that of the second air flap 53, the overflow liquid can flow through the second air flap 53 from top to bottom through the first air flap 52, flow to the interval of the gas transmission body 42, and then be discharged outside the burner.

Claims

1. A burner for a gas stove, comprising

Base (1);

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

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

Features:

The upper surfaces of the outer fire cover (3) and the inner fire cover (2) at least partially have a concave-convex structure and are in a wave shape that is staggered from each other. The ignition or fire transfer structure of the inner fire cover (2) is located at the inner convex part (21) of the concave-convex structure, and correspondingly, the fire transfer or ignition structure of the outer fire cover (3) is located at the outer concave part (31) of the concave-convex structure.

2. The burner for a gas stove according to claim 1 is characterized in that: the upper surface of the outer fire cover (3) has at least two convex parts (32) which are spaced apart and wave-shaped, each of the convex parts (32) has at least two outgoing fire holes (321), the top of each inner convex part (21) of the inner fire cover (2) is higher than each corresponding outer convex part (32) of the outer fire cover (3), and the upper surface of each outer convex part (32) gradually tilts outward from the inside to the outside.

3. The burner for a gas stove according to claim 2 is characterized in that: the inner recess (22) of the inner fire cover (2) is only provided with an ignition structure, and the ignition structure includes at least one ignition hole (221), and the aperture of the ignition hole (221) gradually increases according to the cross-section of the gas outlet direction. Correspondingly, the outer recess (31) of the outer fire cover (3) is provided with a fire transfer structure, and the fire transfer structure includes at least one transverse ignition hole (331) opened in the radial direction, and an external mixing chamber (30) is formed between the outer fire cover (3) and the base (1), and a through hole (3311) connected to the external mixing chamber (30) is opened at the bottom of the transverse ignition hole (331), and an air hole (3312) connected to the outside is opened at the top of the transverse ignition hole (331).

4. The burner for a gas stove according to claim 3 is characterized in that: the outer fire cover (3) includes an annular top wall (33) and an outer annular wall (34) extending vertically or obliquely downward from the outer edge of the annular top wall (33), the transverse ignition hole (331) is arranged on the annular top wall (33), and a drainage channel (35) is also arranged at the bottom of the transverse ignition hole (331), and the discharge port (351) of the drainage channel (35) is opened on the outer annular wall (34).

5. A burner for a gas stove according to claim 3 or 4, characterized in that: the inner fire cover (2) includes an annular top wall (23) and an inner wall (24) extending vertically or obliquely downward from the inner edge and outer edge of the annular top wall (23), and an inner gas mixing chamber (20) is formed between the outer wall (25), the inner opening (2211) of each of the ignition holes (221) is connected to the inner gas mixing chamber (20), and the outer opening (2212) of each of the ignition holes (221) is opened on the outer wall (25).

6. The burner for a gas stove according to claim 5 is characterized in that: the inner wall (24) of the inner fire cover (2) is provided with at least two inner fire holes (241) spaced apart along the circumferential direction, and the central part of the base (1) has an air replenishment chamber (11) which is open at both upper and lower ends and is used to replenish secondary air to the inner fire holes (241).

7. The burner for a gas stove according to claim 6, characterized in that an adjusting structure (5) capable of changing the amount of secondary air is provided in the air replenishing chamber (11).

8. The burner for a gas stove according to claim 7 is characterized in that: a connecting piece (4) is arranged between the base (1) and the inner fire cover (2) and the outer fire cover (3); the base (1) is provided with an inner gas channel (12) connected to the inner fire cover (2); the base (1) is provided with an outer gas channel (13) connected to the outer fire cover (3); the connecting piece (4) includes a plate body (41); the plate body (41) includes at least two gas transmission bodies (42) arranged around the inner fire cover (2); each gas transmission body (42) is arranged at intervals along the circumference of the plate body (41) and is spirally radial as a whole.

9. The burner for a gas stove according to claim 8 is characterized in that each of the gas transmission bodies (42) includes an outer end (421) away from the inner fire cover (2) and an inner end (422) adjacent to the inner fire cover (2), and the plate body (41) gradually tilts outward from the inner end (422) to the outer end (421).

10. The burner for a gas stove according to claim 9 is characterized in that: the inner end (422) of each of the gas transmission bodies (42) is connected by a connecting ring (500), and an inlet (5001) is provided between the bottom end of the connecting ring (500) and the plate body (41) for external secondary air to flow into the air replenishing cavity, and the center of the plate body (41) has a through hole (411) for the adjustment structure (5) to penetrate, and the inner edge of the through hole (411) is located at the inner periphery of the connecting ring (500), and the inner edge of the through hole (411) gradually tilts upward from the outside to the inside, thereby forming a guide portion (4111) for the secondary air to flow into the air replenishing cavity through the inlet (5001).

11. The burner for a gas stove according to claim 10, characterized in that: the adjustment structure (5) comprises a support (51) connected to the air replenishment chamber (11), a first air flap (52) arranged on the inner end edge of the through hole (411), and a second air flap (53) that can move relative to the support (51) and pass 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 when the second air flap (53) moves relative to the support (51), the size of at least the first opening (54) and/or the second opening (55) can be changed.

12. The burner for a gas stove according to claim 11, characterized in that: the second air flap (53) further comprises an air flap rod (56) movable relative to the support (51), the air flap rod (56) having a supporting portion (561) for supporting the first air flap (52) at a location adjacent to the first air flap (52), the first air flap (52) having a ventilation hole (521) at a central area thereof for secondary air to flow in, the outer diameter of the periphery of the first air flap (52) being 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 continue to move upward to the area where the inner fire outlet hole (241) is located. The first air flap (52) moves downward as the second air flap (53) moves downward until the first air flap (52) abuts against the air guide portion (4111), and the first opening (54) is in a closed state. When the second air flap (53) can only continue to move relative to the support (51) until it abuts against the first air flap (52), the second opening (55) is in a closed state.