A burner for a gas stove

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

Technical Field

[0001] The invention relates to the field of household kitchenware, and in particular to a burner for a gas stove. Background Art

[0002] At present, the fire cover of a gas stove usually includes an inner ring fire cover and an outer ring fire cover. The heating method of the pot body is basically a combination of an outer ring flame and an inner ring flame, and the inner and outer ring fire covers are basically a full circle of fire holes. In this case, the smoke flows from the center to the outer circle, and the smoke generated by the inner ring combustion must first pass over the outer ring fire hole and then flow outward, resulting in the influence of the smoke generated by the inner ring combustion on the outer ring flame, such as easily causing the outer ring flame to not fit the bottom of the pot, affecting heat exchange; or the flow of smoke causes the secondary air to be replenished unsmoothly, resulting in incomplete combustion, so it is necessary to develop a new burner structure. In addition, most of the traditional burner fire covers sold on the market are milled with a groove, that is, there is an ignition groove milled on the top of the fire cover body. Since the fire cover body of this burner fire cover is disconnected at the ignition groove, it is easy to cause the fire cover body to deform, thereby affecting the ignition effect.

[0003] For example, a Chinese utility model patent with patent number 201220464214.0 (publication number CN202813375U) "Gas burner head with flame transmission device and flameout protection function" discloses a similar flame transmission structure, in which a plurality of outer ring flame spraying holes are provided on the outer ring flame spraying ring, and an outer ring flame transmission device is also provided on the outer ring flame spraying ring. The outer ring flame transmission device is composed of a boss installed on the inner side wall of the outer ring flame spraying ring, an outer ring flame transmission hole and an outer ring flame transmission groove provided on the boss and the outer ring flame spraying ring, the outer ring flame transmission hole is connected to the outer ring flame transmission groove, and the outer ring flame transmission hole and the outer ring flame transmission groove are connected to a The outer ring flame holes are connected to each other, which can realize rapid fire transfer; the fire transfer groove of the fire transfer structure is open, and the fire transfer is linear, that is, the fire transfer groove is exposed on the surface of the outer ring fire cover. This design has an advantage, that is, the secondary air supply in the fire transfer groove is very sufficient. The open fire transfer groove can ensure the secondary air supply when the flame in the fire transfer groove is burning, which is conducive to flame combustion and fire transfer, and has the characteristics of rapid fire transfer. However, the open fire transfer groove is easy to cause the fire transfer groove to be blocked, that is, the soup flowing from the bottom of the pot can easily flow into the fire transfer groove, which affects the fire transfer performance after blockage. This is also the main reason for the current fire transfer groove blockage and maintenance. Finally, in order to avoid adverse working conditions such as yellow fire and flashback during the use of the burner, most of the existing stoves on the market have a structure with adjustable primary air, but ignore that too much or too little secondary air will also affect the combustion state. For this reason, in summary, in addition to the above-mentioned areas that need to be improved, the existing stove burners still have a lot of room for improvement in anti-blocking performance and cleanliness. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a burner for a gas stove which can avoid the mutual influence between the outer ring flame and the inner ring flame in view of the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the present invention is to provide a burner for a gas stove that can improve the success rate of flame transfer in view of the above-mentioned existing technical status.

[0006] The third technical problem to be solved by the present invention is to provide a burner for a gas stove that can adjust the intake amount of secondary air to achieve stable combustion in view of the above-mentioned existing technical status.

[0007] To solve the first technical problem, the technical solution adopted by the present invention is: the burner for the gas stove comprises

[0008] Pedestal;

[0009] An inner fire cover, arranged on the base, having an ignition / fire transmission structure;

[0010] The outer fire cover is also arranged on the base and arranged at the periphery of the inner fire cover, and has a fire transfer / ignition structure corresponding to the ignition / fire transfer structure of the inner fire cover;

[0011] Features:

[0012] The upper surface of the outer fire cover and / or the inner fire cover has a concave-convex structure at least partially and is in a wavy shape that is staggered from each other. 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.

[0013] Since the upper surface of the outer fire cover and / or the inner fire cover has a concave-convex structure at least partially and is in a wave shape that is staggered from each other, preferably, the upper surface of the outer fire cover has at least two convex parts that are spaced and wave-shaped, each of which has at least two outgoing fire holes, and 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 convex part gradually tilts outward from the inside to the outside. While achieving uniform heating of the pot bottom, it is also necessary to prevent the inner ring flame formed by the inner ring from burning the convex part of the outer fire cover, and for this purpose, the upper surface of the convex part needs to gradually tilt outward from the inside to the outside.

[0014] To solve the second technical problem, preferably, the inner concave part of the inner ignition cover is only provided with an ignition structure, the ignition structure includes at least one ignition hole, and the aperture of the ignition hole gradually increases according to the cross section of the gas outlet direction. Correspondingly, the outer concave part of the outer ignition cover is provided with a fire transfer structure, the fire transfer structure includes at least one transverse ignition hole opened in the radial direction, an external gas mixing chamber is formed between the outer ignition cover and the base, the bottom of the transverse ignition hole is provided with a through hole connected to the external gas mixing chamber, and the top of the transverse ignition hole is provided with an air hole connected to the outside. Since the aperture of the ignition hole gradually increases according to the cross section of the gas outlet direction, it has the function of accelerating the gas speed in the inner opening of the ignition hole, and since the cross section of the gas outlet direction gradually increases, it can promote the mixing of the air flowing from the ignition hole and the air hole with the gas, and better provide sufficient gas and air to the ignition hole, so that the ignition hole of the inner ignition cover can maintain a stable and uniform flame, thereby effectively improving the ignition success rate of the inner ignition cover.

[0015] In order to prevent the overflow from entering the transverse ignition hole due to the opening of the air hole, preferably, the outer fire cover includes an annular top wall and an outer annular wall extending vertically or obliquely downward from the outer edge of the annular top wall, the transverse ignition hole is arranged on the annular top wall, and the bottom of the transverse ignition hole is further provided with an overflow channel, and the discharge port of the overflow channel is arranged on the outer annular wall. The overflow channel can effectively discharge the overflow entering the transverse ignition hole.

[0016] Furthermore, the inner fire cover includes an annular top wall and an inner wall and an outer wall extending vertically or obliquely downward from the inner edge and the outer edge of the annular top wall, and an inner mixing chamber is formed between the inner wall and the outer wall, the inner opening of each ignition hole is connected to the inner mixing chamber, and the outer opening of each ignition hole is opened on the outer wall.

[0017] In order to realize the triple flames of the burner from the center to the periphery, and thus better and more evenly heat the bottom of the pot, preferably, the inner wall of the inner fire cover is provided with at least two inner fire holes spaced apart in the circumferential direction, and the central part of the base has an air replenishment cavity with both upper and lower ends open and used to replenish secondary air to the inner fire holes. In order to avoid the influence of the smoke of the outer ring flame on the replenishment of secondary air when the traditional secondary air is replenished from the periphery to the center, the central part of the base has an air replenishment cavity that independently replenishes the secondary air to the inner fire holes. At the same time, the inner fire hole combined with the concave and convex structure of the inner fire cover and the outer fire cover also has a unique function. Specifically, a part of the smoke from the inner fire cover flows outward along the concave part of the inner fire hole, and is "blocked or compressed" after passing through the upper surface of the convex part of the inner fire cover, so that it fits the bottom of the pot better and is conducive to heat exchange; the smoke generated by the fire hole on the convex part of the inner fire cover flows directly outward from the concave part of the outer fire cover, and flows out through the concave part of the outer fire cover. Preferably, the concave part of the outer fire cover also has a slope, which can also be lifted, so that the smoke flowing out from the concave part will not interfere with the outer ring fire, which is conducive to combustion.

[0018] To solve the third technical problem, preferably, the air replenishment chamber is provided with an adjustment structure capable of changing the amount of secondary air. The arrangement of the adjustment structure enables the inner ignition hole to have a better amount of air replenishment.

[0019] In order to realize the secondary air replenishment from the outer circumference to the air replenishment chamber radially, preferably, a connecting piece is provided between the base and the inner fire cover and the outer fire cover, the base is provided with an inner gas channel connected to the inner fire cover, the base is provided with an outer gas channel connected to the outer fire cover, and the connecting piece includes a plate body, the plate body includes at least two gas transmission bodies arranged around the inner fire cover, each gas transmission body is arranged at intervals along the circumference of the plate body and is spirally radial as a whole. The spiral radial shape of the gas transmission body can accelerate the external secondary air to flow between the gas transmission bodies and enter the air replenishment chamber.

[0020] In order to realize that the gas transmission body has the function of discharging overflow liquid in addition to the function of secondary air introduction, preferably, each gas transmission body includes an outer end away from the inner fire cover and an inner end adjacent to the inner fire cover, and the plate body gradually tilts outward from the inner end to the outer end.

[0021] In order to ensure that the secondary air can be accelerated and effectively guided to the inner fire hole when entering the air replenishment chamber, preferably, the inner end of each of the gas transmission bodies is connected by a connecting ring, and an inlet is provided between the bottom end of the connecting ring and the plate body for external secondary air to flow into the air replenishment chamber, and a through hole is provided in the center of the plate body for the adjustment structure to penetrate, and 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 tilts upward from the outside to the inside, thereby forming a guide portion for the secondary air to flow into the air replenishment chamber through the inlet.

[0022] Furthermore, the regulating structure includes a support connected to the air replenishment cavity, a first air flap arranged on the inner edge of the through hole, and a second air flap that can move relative to the support and pass through the center of the first air flap, a first opening for secondary air to enter is formed between the inner 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 when the second air flap moves relative to the support, the size of at least the first opening and / or the second opening can be changed. Since the first opening and / or the second opening can both allow secondary air to enter, the amount of secondary air replenished in the air replenishment cavity to be replenished in the inner fire outlet can be effectively adjusted by changing the first opening and / or the second opening.

[0023] Furthermore, the second air flap also includes a air flap rod that can move relative to the support, the air flap rod partially has a support portion for supporting the first air flap at a position adjacent to the first air flap, the central area of ​​the first air flap partially has a ventilation 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 ventilation hole and then continue to ascend to the area where the inner fire outlet is located, the first air flap moves downward as the second air flap moves downward until the first air flap abuts against the guide portion, and the first opening is in a closed state, and the second opening is in a closed state when the second air flap can only continue to move relative to the support until it abuts against the first air flap. The specific adjustment process is as follows: since the second air flap is always supported by the supporting part of the air flap rod, when the first air flap moves downward as the second air flap moves downward, but under the premise that the first air flap does not abut against the guide part, the first opening becomes smaller, but the second opening remains unchanged until the first air flap moves downward to abut against the guide part, and the first opening is closed. At this time, the intake amount of secondary air needs to be changed, which can only be achieved by changing the second opening. At this time, you only need to continue to rotate the second air flap. At this time, the second air flap can only continue to move relative to the support, and the second opening gradually becomes smaller as the second air flap moves downward until it abuts against the first air flap, and the second opening is in a closed state.

[0024] Compared with the prior art, the advantage of the present invention is that it provides 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 the overall shape is wavy and staggered from each other, so that the internal and external airflows of the outer fire cover and the inner fire cover do not interfere with each other, and at the same time, the effect of uniformly heating the bottom of the pot can be achieved. In addition, the ignition / fire transfer structures of the inner fire cover and the outer fire cover correspond to each other, especially when the fire transfer is set in a concave position, the airflow is smooth and will not be blocked by the corresponding convex position, which can make it easier to transfer fire under more severe conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a burner in an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A cross-sectional view at an angle (showing that the first opening and the second opening formed by the first air flap and the second air flap are in a larger state);

[0027] Figure 3 for Figure 1 A cross-sectional view from another angle (showing that the first opening and the second opening formed by the first air flap and the second air flap are in a state of being adjusted to be smaller);

[0028] Figure 4 for Figure 1 A cross-sectional view from another angle (showing that the first opening and the second opening formed by the first air flap and the second air flap are in a closed state);

[0029] Figure 5 It is a structural schematic diagram of the adjustment structure in an embodiment of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the inner fire cover in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of a connector in an embodiment of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the outer fire cover in an embodiment of the present invention;

[0033] Fig. 9 for Figure 8 sectional view of . DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 9The figure shows the best embodiment of the present invention. The burner for the gas stove in the present embodiment comprises a base 1, an inner fire cover 2 arranged on the base 1 and having an ignition / fire transfer structure, and an outer fire cover 3 which is also arranged on the base 1 and 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, wherein the upper surface of the outer fire cover 3 and / or the inner fire cover 2 has a concave-convex structure at least partially and is in a wavy shape that is staggered from each other as a whole, the ignition / fire transfer structure of the inner fire cover 2 is located at the inner convex part 21 of its concave-convex structure, and correspondingly, the fire transfer / ignition structure of the outer fire cover 3 is located at the outer concave part 31 of its concave-convex structure, wherein the ignition / fire transfer structure of the inner fire cover 2 is located at the inner convex part 21 of its concave-convex structure, and correspondingly, the fire transfer / ignition structure of the outer fire cover 3 is located at the outer concave part 31 of its concave-convex structure / The ignition structure is located at the outer concave part 31 of its concave-convex structure. According to the common design methods in this field, the ignition structure can be set on the inner fire cover 2 or on the outer fire cover 3, that is, to realize fire transfer from the inside to the outside, or to realize fire transfer from the outside to the inside. Correspondingly, the fire transfer structure can be correspondingly set in the inner fire cover 2 and the outer fire cover 3. This embodiment is described by taking the ignition structure being set on the inner fire cover 2 and the fire transfer structure being set on the outer fire cover 3 as an example, wherein the fire transfer structure is preferably set on the outer concave part 31 of the outer fire cover 3, and the ignition structure is set on the inner convex part 21 of the inner fire cover 2. The reason is that when the fire transfer is set on the outer concave part 31, the airflow is smooth and will not be blocked by the corresponding outer convex part 32, which can make it easier to transfer fire under more severe conditions.

[0036] Since the upper surface of the outer fire cover 3 and / or the inner fire cover 2 has a concave-convex structure at least partially and the overall burner is in the shape of a wave that is staggered from each other, it is possible to achieve non-interference between the internal and external airflows of the outer fire cover 3 and the inner fire cover 2, and at the same time, the effect of uniform heating of the bottom of the pot can be achieved. Specifically, as shown in Figure 8, the upper surface of the outer fire cover 3 has at least two convex portions 32 that are spaced and wavy, and each convex portion 32 has at least two external firing holes 321. The top of each inner convex portion 21 of the inner fire cover 2 is higher than each corresponding outer convex portion 32 of the outer fire cover 3, and the upper surface of each convex portion 32 gradually tilts outward from the inside to the outside. While achieving uniform heating of the bottom of the pot, it is also necessary to prevent the inner ring flame formed by the inner ring from burning the convex portion 32 of the outer fire cover 3. To this end, the upper surface of the convex portion 32 needs to gradually tilt outward from the inside to the outside. The inner recess 22 of the inner fire cover 2 is only provided with an ignition structure, which includes at least one ignition hole 221. 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, which includes at least one radially opened transverse ignition hole 331. An external mixing air chamber 30 is formed between the outer fire cover 3 and the base 1. A through hole 3311 connected to the external mixing air chamber 30 is formed 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. Since the aperture of the ignition hole 221 gradually increases according to the cross section of the gas outlet direction, the inner opening 2211 of the ignition hole 221 has the function of accelerating the gas speed, and since the cross section of the gas outlet direction gradually increases, it can promote the mixing of the air flowing from the air hole 3312 in the ignition hole 221 with the gas, and better provide sufficient gas and air to the ignition hole 221, so that the ignition hole 221 of the inner fire cover 2 can maintain a stable and uniform flame, thereby effectively improving the ignition success rate of the inner fire cover 2. In order to avoid the phenomenon of failure to ignite when only one ignition hole 221 is set and it is easy to be blocked by overflow, the ignition hole 221 can be set into two and spaced apart from each other, and a flame stabilizing groove 220 is also set between the upper and lower ignition holes 221. Similarly, in order to prevent the opening of the air hole 3312 from causing the overflow to enter the transverse ignition hole 331, preferably, 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 an overflow channel 35 is further arranged at the bottom of the transverse ignition hole 331, and a discharge port 351 of the overflow channel 35 is arranged on the outer annular wall 34. The overflow channel 35 is arranged so that the overflow entering the transverse ignition hole 331 can be effectively discharged.

[0037] like Figure 6As shown, the inner fire cover 2 includes an annular 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 annular top wall 23, and an inner gas mixing chamber 20 is formed between them. The inner opening 2211 of each ignition hole 221 is connected to the inner gas mixing chamber 20, and the outer opening 2212 of each ignition hole 221 is opened on the outer wall 25. In order to realize that the burner has a triple flame from the center to the periphery, and thus better and more evenly heats the bottom of the pot, preferably, 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 with both upper and lower ends open and used to replenish secondary air to the inner fire hole 241. In order to avoid the influence of the smoke of the outer ring flame on the replenishment of secondary air when the traditional secondary air is replenished from the periphery to the center, the central part of the base 1 has an air replenishment chamber 11 that independently replenishes secondary air to the inner fire hole 241. At the same time, the inner fire hole 241 combined with the concave-convex structure of the inner fire cover 2 and the outer fire cover 3 also has a unique function, specifically, a part of the smoke from the inner fire cover 2 flows outward along the inner concave part 22 of the inner fire hole 241, and is "blocked or compressed" after passing through the upper surface of the inner convex part 21 of the inner fire cover 2, so that it fits the bottom of the pot better and is conducive to heat exchange; the smoke generated by the fire hole on the outer convex part 32 of the inner fire cover 2 flows directly outward 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. Preferably, the outer concave part 31 of the outer fire cover 3 also has an inclined surface, and can also be lifted, so that the smoke flowing out from the outer concave part 31 will not interfere with the outer ring fire, which is conducive to combustion.

[0038] In order to better supplement the secondary air to the inner fire hole 241, an adjustment structure 5 capable of changing the amount of secondary air is provided in the air supplement chamber 11. The adjustment structure 5 can be provided to enable the inner fire hole 241 to have a better amount of air supplement. A connecting piece 4 is provided 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. The specific structure of the connecting piece 4 can be referred to. Figure 7The spiral radial shape of the gas transmission body 42 can accelerate the flow of external secondary air into the gas transmission body 42 and into the air replenishment chamber 11, so that the secondary air is replenished radially from the outer circumference to the air replenishment chamber 11. In order to realize that the gas transmission body 42 has the function of draining overflow in addition to the function of introducing secondary air, each gas transmission body 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. The inner side end 422 of each gas transmission body 42 is connected by a connecting ring 500. An inlet 5001 is provided between the bottom end of the connecting ring 500 and the plate body 41 for allowing external secondary air to flow into the air replenishing cavity. The center of the plate body 41 has a through hole 411 for the regulating structure 5 to penetrate. The inner edge of the through hole 411 is located at the inner periphery of the connecting ring 500. The inner edge of the through hole 411 gradually tilts upward from the outside to the inside, thereby forming a guide portion 4111 for secondary air to flow into the air replenishing cavity through the inlet 5001. The inlet 5001 and the guide portion 4111 work together to accelerate and cool the secondary air when it enters the air replenishing cavity 11. The air is effectively directed to the inner fire outlet hole 241. The regulating structure 5 includes a support 51 connected to the air replenishment chamber 11, a first air flap 52 arranged on the inner 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 edge of the through hole 411 and the first air flap 52, and a second opening 55 for secondary air to enter is formed between the first air flap 52 and the second air flap 53. 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. Since the first opening 54 and / or the second opening 55 can both allow the entry of secondary air, the amount of secondary air replenished in the air replenishment chamber to the inner fire outlet hole 241 can be effectively adjusted by changing the first opening 54 and / or the second opening 55. Specifically, the second air flap 53 also includes a air flap rod 56 that can move relative to the support 51. The air flap rod 56 has a supporting portion 561 for supporting the first air flap 52 at a position adjacent to the first air flap 52. The central area of ​​the first air flap 52 has a ventilation hole 521 for secondary air to flow in. The outer diameter of the 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 continue to ascend to the area where the inner fire 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 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.

[0039] refer to Figure 2 to Figure 5, the path of the secondary air entering the air replenishment chamber 11 and continuing to ascend to replenish the inner fire hole 241 area is as follows (refer to the solid arrow part of the dotted line): first, the secondary air flows into the inner fire hole 241 area along the gas transmission body 42 through the inlet 51 in the radial direction; second, the secondary air goes up along the air replenishment chamber 11 from bottom to top through the first opening 54 and the second opening 55 to replenish the inner fire hole 241 area, and how to adjust the first opening 54 and the second opening 55 to adjust the secondary air volume, the specific adjustment process is as follows: Since the second air flap 53 is always supported by the supporting portion 561 of the air flap rod 56, when the first air flap 52 moves downward with the downward movement of the second air flap 53, but the first air flap 52 does not abut against the guide portion 4111, the first opening 54 becomes smaller, but the second opening 55 remains unchanged until the first air flap 52 moves down to the guide portion 4111 In the state of being offset, the first opening 54 is closed. At this time, if the intake amount of the secondary air needs to be changed, it can only be achieved by changing the second opening 55. At this time, it is only necessary to continue to rotate the second air flap 53. The second air flap 53 can be rotated with the help of the adjustment part 57 at the lower end of the second air flap 53. At this time, the second air flap 53 can only continue to move relative to the support 51 by itself, and the second opening 55 gradually becomes smaller as the second air flap 53 moves downward until it is in a state of being offset with the first air flap 52, and the second opening 55 is in a closed state; at the same time, the supplementary path of the secondary air can also be used as a discharge channel for overflow (refer to the hollow arrow part of the dotted line). When the overflow generated during the cooking process flows through the first air flap 52, since the outer diameter of the first air flap 52 is smaller than the second air flap 53, the overflow can pass through the first air flap 52 from top to bottom, flow through the second air flap 53, and then 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 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, characterized in that: The upper surface of the outer fire cover (3) has at least two wavy outer protrusions (32) which are spaced apart from each other, each of which has at least two outgoing fire holes (321). The top of each inner protrusion (21) of the inner fire cover (2) is higher than each corresponding outer protrusion (32) of the outer fire cover (3), and the upper surface of each outer protrusion (32) gradually tilts outward from the inside to the outside.

3. The burner for a gas stove according to claim 2, characterized in that: The inner concave portion (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 concave portion (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. An external air mixing chamber (30) is formed between the outer fire cover (3) and the base (1), and a through hole (3311) connected to the external air 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, characterized in that: The outer fire cover (3) comprises 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); a liquid discharge channel (35) is also arranged at the bottom of the transverse ignition hole (331); and a discharge outlet (351) of the liquid discharge channel (35) is opened on the outer annular wall (34).

5. The burner for a gas stove according to claim 3 or 4, characterized in that: The inner fire cover (2) comprises an annular 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 annular top wall (23), and an inner gas mixing chamber (20) is formed between the inner opening (2211) of each ignition hole (221) is connected to the inner gas mixing chamber (20), and the outer opening (2212) of each ignition hole (221) is opened on the outer wall (25).

6. The burner for a gas stove 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) spaced apart along the circumferential direction, and the central portion of the base (1) has an air replenishment cavity (11) which is open at both upper and lower ends and is used to replenish secondary air to the inner fire outlet holes (241).

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

8. The burner for a gas stove according to claim 7, characterized in that: A connecting piece (4) is provided between the base (1) and the inner fire cover (2) and the outer fire cover (3); an inner gas passage (12) communicating with the inner fire cover (2) is provided on the base (1); an outer gas passage (13) communicating with the outer fire cover (3) is provided on the base (1); 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, characterized in that: Each gas transmission body (42) comprises 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, characterized in that: The inner end (422) of each of the gas transmission bodies (42) is connected via a connecting ring (500); an inlet (5001) is provided between the bottom end of the connecting ring (500) and the plate body (41) for allowing external secondary air to flow into the air replenishing cavity; a through hole (411) is provided in the center of the plate body (41) for allowing the regulating structure (5) to penetrate; the inner edge of the through hole (411) is located within the inner periphery of the connecting ring (500); 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 regulating structure (5) comprises a support (51) connected to the air replenishing chamber (11), a first air flap (52) arranged on the inner end edge of the through hole (411), and a second air flap (53) which 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); 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 support 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 allowing 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 flow through the ventilation hole (521) ) enters the second opening (55) and then continues to move upward to the area where the inner fire outlet (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. In a state where 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.

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