CN111720821A

CN111720821A - Burner for gas stove

Info

Publication number: CN111720821A
Application number: CN201910217300.8A
Authority: CN
Inventors: 邵海忠; 郑军妹
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2020-09-29

Abstract

The invention relates to a burner for a gas stove, which comprises a base and an inner ring fire cover arranged on the base, wherein the inner ring fire cover comprises a top wall and an annular wall extending downwards from the periphery of the top wall, a central gas mixing chamber is formed between the inner ring fire cover and the base, and fire outlets communicated with the central gas mixing chamber are formed in the annular wall at intervals along the circumferential direction; the method is characterized in that: compared with the prior art, the invention has the advantages that the space capable of containing the overflowing liquid is independently formed in the inner ring fire cover, the guide channel capable of guiding the overflowing liquid to the annular wall is arranged, the overflowing liquid can be accelerated to be discharged from the central gas mixing chamber, the fire of the fire outlet hole of the annular wall is not influenced, the invention is particularly suitable for being used in a sharp pot, and the structure is simple, so that the fire cover has the effect of being used for one object and two purposes.

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

A common household burner generally has an outer fire cover and an inner fire cover, and realizes functions of generating flame, maintaining flame and the like together with elements such as an ignition needle, a thermocouple (or an ion induction needle with the same function), and the like, wherein the ignition needle and the thermocouple are mainly arranged around the inner fire cover, when a fire hole blocked by overflow liquid corresponds to the vicinity of the ignition needle, a gas stove is not ignited, and when the blocked fire hole corresponds to the vicinity of the thermocouple (or the ion induction needle with the same function), the gas stove cannot maintain flame, so that the service life is influenced; secondly, the user often can place the mistake when putting back after clearing up the inner ring, all has the ignition brim of a hat in the conventional design of inner ring fire lid, and the user often places the inner ring with the ignition brim of a hat to the thermocouple owing to unclear ignition needle and thermocouple. Finally, the existing fire cover structure design of the ignition part and the fire protection part is simple, a lighting hole or a fire protection hole is designed in a targeted mode basically, the success rate of ignition and fire protection is low due to the fact that the lighting hole is blocked or the lighting hole is away from flames and the like, and therefore the structure of the fire cover needs to be further improved.

In addition, in order to realize uniform heating of the pot bottom, the existing stove burners in the market usually have corresponding changes in the distribution of the fire holes on the inner ring and the outer ring, for example, a Chinese utility model 'upper air inlet furnace end' with the patent number ZL201820258341.2 (the publication number is CN208186341U) comprises a furnace end, an outer ring fire cover and a central fire cover, the inner side and the outer side of the outer ring fire cover relative to the inner ring fire cover are provided with fire holes, wherein the fire holes on the inner side and the outer side of the outer ring fire cover are aligned one to one, once overflowing liquid overflows in the cooking process, the fire holes on the inner side and the outer side can be simultaneously blocked, and therefore, the arrangement of the fire holes on the inner side and the outer side of the outer ring fire cover needs to be better designed; therefore, the Chinese patent application CN200410052538.3 (with the publication number CN1786569A) of the invention discloses a burner fire cover, which comprises a fire cover body, wherein an air cavity is arranged on the bottom surface of the fire cover body, an inclined surface is arranged on the outer circumference of the fire cover body, a plurality of fire holes are arranged on the inclined surface along the outer circumference, the fire holes are obliquely arranged and communicated with the air cavity, the distribution of the fire holes is in a wave shape along the vertical direction, the fire holes are in a wave shape distribution, so that when the burner burns, the fire is more uniform, and are distributed in a plurality of layers in a circle, the heat efficiency is higher, the fire holes of the fire cover change in the radial direction, but only one circle of fire holes is arranged, and the fire power is still not large. Or with the chinese utility model "petal fire lid of gas burner" of patent No. ZL201420079377.6 (the publication number is CN203744259U), this fire lid can concentrate on heating the pan corresponding to the flame of protruding lamella portion, and the flame height corresponding to the depressed part is less, and the position is lower, corresponds the support piece of furnace frame, avoids the support piece of furnace frame to be heated by high temperature for a long time. However, the fire cover changes in axial height, and only the fire holes are formed in the outer periphery of the fire cover, so that high firepower cannot be realized, the problem that the fire holes are easily blocked by overflowing liquid still cannot be solved, and the outer ring fire cover also needs to be further improved.

Disclosure of Invention

The invention aims to solve the first technical problem of providing a burner for a gas stove, which can reduce the probability of overflowing liquid blocking an inner ring fire cover.

The second technical problem to be solved by the present invention is to provide a burner for a gas stove, which can effectively prevent the overflow liquid from entering the ignition hole and improve the ignition efficiency, in view of the above-mentioned current 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 effectively prevent the overflow liquid from entering the fire protection hole and improve the fire protection efficiency, in view of the above-mentioned current technical situation.

The fourth technical problem to be solved by the present invention is to provide a burner for a gas stove, which has a good fool-proof effect of an inner ring fire cover, in view of the above-mentioned current state of the art.

The fifth technical problem to be solved by the invention is to provide the burner for the gas stove, which can reduce the probability of fire hole blockage caused by overflowing liquid on the premise of improving the uniformity of the outer ring fire cover for heating the pot bottom.

The technical scheme adopted by the invention for solving the technical problems is as follows: the burner for the gas stove comprises

A base;

the inner ring fire cover is arranged on the base, comprises a top wall and an annular wall extending downwards from the periphery of the top wall, a central gas mixing chamber is formed between the inner ring fire cover and the base, and fire outlets communicated with the central gas mixing chamber are formed in the annular wall at intervals along the circumferential direction;

the method is characterized in that: the central gas mixing chamber is internally provided with a flow guide channel for guiding overflow liquid, a liquid inlet of the flow guide channel is arranged on the top wall, and a liquid outlet of the flow guide channel is positioned below the fire outlet.

Further, in order to effectively prevent the phenomenon that the bottom of an annular cavity between the inner ring fire cover and the outer ring fire cover is blackened when liquid bodies such as overflowing liquid are dried, the liquid outlet of the flow guide channel is arranged on the annular wall, and an annular liquid storage tank communicated with the liquid outlet is further arranged below the liquid outlet of the annular wall.

Further, an ignition needle is arranged on the base at a position adjacent to the annular wall of the inner ring fire cover, at least one ignition hole is formed in the annular wall corresponding to the wall surface of the ignition needle, and an auxiliary ignition hole communicated with the ignition hole is formed in a position, adjacent to the ignition hole, of the annular wall. This supplementary ignition hole has the duplicate protection effect, has the effect that improves the ignition hole success rate on the one hand, even the overflow gets into the ignition hole, is difficult for taking place the phenomenon that the ignition is not lighted, and on the other hand has the effect in steady flame ignition hole.

Preferably, the auxiliary ignition hole has two, symmetrically disposed at both sides of the ignition hole. Even there is rocking when inner ring fire lid and the base assembly, two supplementary ignition holes also can guarantee that the user places the inner ring fire lid and also can successfully ignite when not centering.

Furthermore, a thermocouple arranged opposite to the ignition needle is arranged on the base, the thermocouple and the ignition needle are positioned at two ends of the inner ring fire cover in the diameter direction, at least one fire protection hole is formed in the wall surface of the annular wall corresponding to the thermocouple, and an auxiliary fire protection hole communicated with the fire protection hole is formed in the position, adjacent to the fire protection hole, of the annular wall. This supplementary hole of protecting a fire has the duplicate protection effect, has the effect that improves the hole success rate of protecting a fire on the one hand, can ensure the heated area of thermocouple and flame contact, and the thermocouple is not only heated sufficiently to produce sufficient thermoelectromotive force, on the other hand has the effect in steady flame hole of protecting a fire.

Preferably, the auxiliary fire protection holes are two and symmetrically arranged on two sides of the fire protection hole. Even there is rocking when inner ring fire lid and the base assembly, two supplementary fire protecting holes also can guarantee that the user places the inner ring fire lid and also can successfully protect the fire when not centering.

In order to ensure that the fool-proof effect of the inner ring fire cover is good, the annular wall of the inner ring fire cover is partially inwards contracted along the radial direction of the inner ring fire cover on the first wall surface where the ignition hole and the auxiliary ignition hole are located, the annular wall of the inner ring fire cover is partially inwards contracted along the radial direction of the inner ring fire cover on the second wall surface where the fire protection hole and the auxiliary fire protection hole are located, and the inwards contracted lengths of the two walls are the same. Because the first wall surface and the second wall surface are symmetrical relative to the positioning mode of the base, the fire holes at the ignition and fire protection position are also consistent in arrangement, and the ignition and fire protection are not influenced no matter how the first wall surface and the second wall surface are placed.

In order to further reduce the influence of the overflowing liquid on the ignition needle and the thermocouple, the annular wall of the inner ring fire cover partially extends outwards along the radial direction of the inner ring fire cover to form a waterproof brim which shields the ignition needle and the thermocouple.

Wherein the inlet of the guide channel may be one or more, preferably centrally located, and the inlet of the guide channel is one and centrally located in the top wall.

Preferably, the center of the top wall is lower than the periphery of the top wall. When the liquid body such as overflowing liquid entering the top wall flows through the top wall, the liquid body flows from the periphery to the center and then enters the liquid inlet positioned in the center, so that the liquid body such as overflowing liquid flows to the flow guide channel more intensively.

In order to increase the speed of the overflowing liquid flowing out of the inner ring fire cover, the flow guide channel comprises a vertical main flow channel and at least one horizontal flow distribution channel communicated with the main flow channel. Preferably, the flow dividing channel is also obliquely arranged.

Preferably, the flow dividing channel gradually expands outwards from inside to outside along the radial direction of the inner cover fire body.

Furthermore, the base is provided with an inner ring gas channel communicated with the central gas mixing chamber, and the flow dividing channel can at least partially shield the gas outlet end of the inner ring gas channel. The shunting channel can also slow down the speed of the mixed gas of the fuel gas and the primary air entering the central gas mixing chamber, so that the fire of the inner ring fire cover is more stable.

In order to ensure that the gas outlet end of the inner ring gas channel also has a certain speed of slowing down the speed of the mixed gas of the gas and the primary air entering the central gas mixing chamber, the sectional area of the gas outlet end of the inner ring gas channel is gradually reduced from bottom to top, and the sectional area of the central gas mixing chamber is larger than the sectional area of the uppermost part of the gas outlet end.

Further, the annular liquid storage tank comprises an inner side peripheral wall and an outer side peripheral wall, the outer side peripheral wall gradually inclines upwards from outside to inside along the radial direction, and the outer side peripheral wall and the inner side peripheral wall form a liquid storage area together. The outer peripheral wall also has the function of guiding secondary air.

The outer ring fire cover comprises an annular top wall, an inner ring wall and an outer ring wall, wherein the inner ring wall and the outer ring wall vertically or obliquely extend downwards from the inner edge and the outer edge of the annular top wall, the outer ring wall and the base form an outer ring gas mixing chamber, first top walls which gradually incline upwards from the outer periphery to the center are arranged on the annular top wall at intervals, and first outer fire holes communicated with the outer ring gas mixing chamber are formed in the positions, corresponding to the first top walls, of the inner ring wall. Because first outer fire hole corresponds first roof and is for upwards inclining from periphery to central authorities gradually for the overflow falls into the first roof that goes out the fire hole and corresponds, can be fast with the position that the overflow direction was kept away from in first outer fire hole.

In order to realize that the fire outlet holes of the outer ring fire cover and the outer fire holes are arranged in a staggered mode and are more uniformly distributed at the bottom of the pot bottom, the annular top wall further comprises a second top wall connected with the adjacent first top wall, the second top wall is gradually inclined downwards from the outer periphery to the center, and the position, corresponding to the second top wall, of the outer ring wall is provided with a second outer fire hole communicated with the outer ring gas mixing chamber. Because the outer fire hole of second corresponds the second roof and is for sloping down gradually from periphery to central authorities for the overflow falls into the second roof that outer fire hole corresponds, can keep away from the position of outer fire hole with the overflow direction fast, and the position that the overflow was derived is not equipped with first outer fire hole on the rampart including, has avoided the influence of overflow to first outer fire hole for this reason again, the crisscross setting of first roof and second roof still is favorable to the supply of external secondary air in addition, reduces the flue gas.

Compared with the prior art, the invention has the advantages that the space capable of containing the overflowing liquid is independently formed in the inner ring fire cover, the guide channel capable of guiding the overflowing liquid to the annular wall is arranged, the overflowing liquid can be accelerated to be discharged from the central gas mixing chamber, the fire of the fire outlet hole of the annular wall is not influenced, the fire cover is particularly suitable for being matched with a pot, the structure is simple, and the fire cover has the function of one object and two purposes.

Drawings

FIG. 1 is a schematic view of a burner in accordance with embodiment 1 of the present invention;

FIG. 2 is a schematic view of an angle structure of an inner ring fire cover in embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of an inner ring fire cover at another angle in embodiment 1 of the present invention;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a cross-sectional view at an angle of FIG. 1;

FIG. 6 is a schematic view of another angle of FIG. 1;

FIG. 7 is a schematic structural view of an inner ring fire cover corresponding to a thermocouple in embodiment 1 of the present invention;

FIG. 8 is a schematic structural view of an inner ring fire cover corresponding to the fire needle in embodiment 1 of the present invention;

FIG. 9 is a schematic view showing the structure of a burner in embodiment 2 of the present invention;

fig. 10 is a cross-sectional view of fig. 9.

Detailed Description

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

Example 1

Referring to fig. 1 to 8, a burner for a gas range according to the present embodiment includes a base 1; the inner ring fire cover 2 is arranged on the base 1, the inner ring fire cover 2 comprises a top wall 21 and an annular wall 22 extending downwards from the periphery of the top wall 21, a central air mixing chamber 23 is formed between the inner ring fire cover and the base 1, a flow guide channel 3 for guiding overflow is arranged in the central air mixing chamber 23, a liquid inlet 32 of the flow guide channel 3 is arranged on the top wall 21, a liquid outlet 31 of the flow guide channel 3 is positioned below the fire outlet 227, preferably, the liquid outlet 31 of the flow guide channel 3 is arranged on the annular wall 22, the annular wall 22 is further provided with an annular liquid storage tank 4 communicated with the liquid outlet 31 below the liquid outlet 31, wherein the liquid inlet of the flow guide channel can be one or more, preferably, the flow guide channel 3 is arranged at the center, and the liquid inlet 32 of the flow guide channel 3 is provided with one and arranged at the center of. Preferably, the center of the top wall 21 is lower than the periphery of the top wall 21, so that the liquid material such as the overflowing liquid entering the top wall 21 flows from the periphery to the center and then enters the liquid inlet 32 at the center when flowing through the top wall 21, so that the liquid material such as the overflowing liquid flows more intensively to the flow guide channel 3. In order to increase the speed of the overflow flowing out of the inner fire cover 2, the flow guide channel 3 comprises a vertical main flow channel 33 and at least one horizontal flow distribution channel 34 communicated with the main flow channel 33, the flow distribution channel 34 gradually expands outwards from inside to outside along the radial direction of the inner fire cover 2, and preferably, the flow distribution channel 34 can also be obliquely arranged. The inner ring fire cover 2 is internally and independently provided with a space capable of containing overflowed liquid, and is provided with a flow guide channel 3 capable of guiding the overflowed liquid to the annular wall 22, so that the overflowed liquid can be discharged from the central gas mixing chamber 23 quickly, the discharged overflowed liquid flows into the annular liquid storage tank 4, the fire of the fire hole of the annular wall 22 is not influenced, the annular liquid storage tank 4 is particularly suitable for being matched with a sharp pot, and has the function of dual purposes, the annular liquid storage tank 4 comprises an inner side peripheral wall 41 and an outer side peripheral wall 42, the outer side peripheral wall 42 is gradually inclined upwards along the radial direction from outside to inside, and forms a liquid storage area together with the inner side peripheral wall 41, and the outer side peripheral wall 42 also has the function of guiding secondary air.

Wherein, in order to effectively prevent the overflow liquid from entering the ignition hole 221, improve the ignition efficiency, the base 1 is still provided with the ignition needle 5 in the position of the annular wall 22 of neighbouring inner ring fire lid 2, the wall surface that the annular wall 22 corresponds the ignition needle 5 has seted up at least one ignition hole 221, the position that the annular wall 22 is neighbouring the ignition hole 221 has the supplementary ignition hole 222 that link up mutually with ignition hole 221, this supplementary ignition hole 222 has dual protection effect, on the one hand have the effect that improves the success rate of ignition hole 221, even the overflow liquid enters the ignition hole 221, the phenomenon that the ignition is not easily taken place, on the other hand has the effect of steady flame ignition hole 221. Preferably, the auxiliary ignition holes 222 have two symmetrically disposed at both sides of the ignition hole 221, and even if there is a shaking in assembling the inner ring ignition cap 2 and the base 1, the two auxiliary ignition holes 222 can ensure that the user can successfully ignite when the user places the inner ring ignition cap 2 not in the center. Meanwhile, a thermocouple 6 arranged opposite to the ignition needle 5 is further arranged on the base 1, the thermocouple 6 and the ignition needle 5 are located at two ends of the inner ring fire cover 2 in the diameter direction, at least one fire protection hole 223 is formed in the wall surface of the annular wall 22 corresponding to the thermocouple 6, and an auxiliary fire protection hole 224 communicated with the fire protection hole 223 is formed in the position, adjacent to the fire protection hole 223, of the annular wall 22. This supplementary hole 224 of protecting a fire has the duplicate protection effect, has the effect that improves the hole 223 of protecting a fire success rate on the one hand, can ensure the heated area of thermocouple 6 and flame contact, and thermocouple 6 is not only heated sufficiently to produce sufficient thermoelectromotive force, on the other hand has the effect of flame stabilizing hole 223 of protecting a fire. Preferably, the auxiliary fire protection holes 224 have two, symmetrically disposed at both sides of the fire protection hole 223. Even there is rocking when inner ring fire lid 2 and base 1 assembly, two supplementary fire protection holes 224 can also guarantee that the user places inner ring fire lid 2 and also can successfully protect the fire when not centering.

In order to make the fool-proof effect of the inner ring fire cover 2 good, the annular wall 22 of the inner ring fire cover 2 is partially inwardly contracted along the radial direction of the inner ring fire cover 2 on the first wall surface 225 where the ignition hole 221 and the auxiliary ignition hole 222 are located, the annular wall 22 of the inner ring fire cover 2 is also partially inwardly contracted along the radial direction of the inner ring fire cover 2 on the second wall surface 226 where the fire protection hole 223 and the auxiliary fire protection hole 224 are located, and the inward contraction lengths of the two are the same. Because the first wall 225 and the second wall 226 are symmetrically positioned with respect to the base 1, the fire holes at the ignition and fire-holding locations are also uniformly arranged, and no matter how they are arranged, the ignition and fire-holding are not affected. In order to further reduce the influence of the overflowing liquid on the ignition needle 5 and the thermocouple 6, the annular wall 22 of the inner ring fire cover 2 partially extends outwards along the radial direction of the inner ring fire cover 2 to form a waterproof brim which is shielded above the ignition needle 5 and the thermocouple 6. The base 1 is provided with an inner ring gas channel 11 communicated with the central gas mixing chamber 23, the diversion channel 34 can at least partially shield the gas outlet end 111 of the inner ring gas channel 11, and the diversion channel 34 can also slow down the speed of the gas and primary air mixture entering the central gas mixing chamber 23, so that the fire of the inner ring fire cover 2 is more stable. In order that the gas outlet end 111 of the inner ring gas channel 11 also has a certain speed of slowing down the speed of the mixture of the gas and the primary air entering the central gas mixing chamber 23, the sectional area of the gas outlet end 111 of the inner ring gas channel 11 is gradually reduced from bottom to top, and the sectional area of the central gas mixing chamber 23 is larger than the sectional area of the uppermost part of the gas outlet end 111.

The burner comprises a base 1, a plurality of radial secondary air supply channels which are used for communicating an air supply cavity with the outside are arranged on the base 1 at intervals along the circumferential direction, secondary air flowing out of the secondary air supply channels is divided into an inner independent channel and an outer independent channel by an annular liquid storage tank 4 positioned in the air supply cavity, wherein one path of secondary air independently supplies secondary air to the root of an outer fire hole of an outer fire cover 7, and the other path of secondary air independently supplies secondary air to an inner fire hole of an inner fire cover 2.

Example 2

The structure is basically the same as that of the embodiment 1, and the only difference is that: as shown in fig. 9 and 10, the arrangement of the outer fire cover 7 is different, in the outer fire cover 7 of the present embodiment, the outer fire cover 7 is also arranged on the base 1 and located at the periphery of the inner fire cover 2, the outer fire cover 7 includes an annular top wall 70, an inner annular wall 71 and an outer annular wall 72 extending vertically or obliquely downward from the inner and outer edges of the annular top wall 70, and the base 1 form an outer fire mixing chamber 73, the annular top wall 21 is provided with first top walls 211 gradually inclining upward from the outer periphery to the center at intervals, and the inner annular wall 71 is provided with first outer fire holes 731 communicated with the outer fire mixing chamber 73 at a position corresponding to the first top walls 211. Because the first outer fire hole 731 is inclined upwards from the outer periphery to the center of the first top wall 211, the overflow falls into the first top wall 211 corresponding to the fire hole, so that the overflow can be guided away from the first outer fire hole 731 quickly. In order to realize the staggered arrangement of the fire outlet holes and the outer fire holes of the outer ring fire cover 7 and more evenly distributed at the bottom of the pot bottom, the ring-shaped top wall 70 further comprises a second top wall 212 connected with the adjacent first top wall 211, the second top wall 212 gradually inclines downwards from the outer periphery to the center, the position of the outer ring wall 72 corresponding to the second top wall 212 is provided with a second outer fire hole 732 communicated with the outer ring gas mixing chamber 73, as the second outer fire hole 732 corresponding to the second top wall 212 gradually inclines downwards from the outer periphery to the center, the overflowed liquid falls into the second top wall 212 corresponding to the outer fire hole, the overflowed liquid can be quickly guided to the position far away from the outer fire hole, and the position where the overflowed liquid is guided out is not provided with the first outer fire hole 731 on the inner ring wall 71, therefore, the influence of the overflowed liquid on the first outer fire hole 731 is avoided, in addition, the staggered arrangement of the first top wall 211 and the second top wall 212, simultaneously, the upside of first outer fire hole 731 is for the first roof 211 from the periphery upwards slope gradually to central authorities, and the secondary air supply that introduces from first roof 211 gives the tip of fire hole, is favorable to the abundant burning of first outer fire hole 731, in addition, because first outer fire hole 731 corresponds first roof 211 for from the periphery upwards slope gradually to central authorities for the overflow falls into the first roof 211 that first outer fire hole 731 corresponds, can be fast with the position that the first outer fire hole 731 is kept away from in the direction of overflow. In addition, a space capable of containing the overflowing liquid is independently formed in the inner ring fire cover 2, the guide channel 3 capable of guiding the overflowing liquid to the annular wall 22 is arranged, the overflowing liquid can be discharged from the central gas mixing chamber 23 quickly, the discharged overflowing liquid flows into the annular liquid storage tank 4, and fire of fire holes in the annular wall 22 is not influenced.

Claims

1. A burner for gas stove comprises

A base (1);

the inner ring fire cover (2) is arranged on the base (1), the inner ring fire cover (2) comprises a top wall (21) and an annular wall (22) extending downwards from the periphery of the top wall (21), a central gas mixing chamber (23) is formed between the inner ring fire cover and the base (1), and fire outlet holes (227) communicated with the central gas mixing chamber (23) are formed in the annular wall (22) at intervals along the circumferential direction;

the method is characterized in that: a flow guide channel (3) for guiding overflow liquid is arranged in the central air mixing chamber (23), a liquid inlet (32) of the flow guide channel (3) is formed in the top wall (21), and a liquid outlet (31) of the flow guide channel (3) is located below the fire outlet (227).

2. Burner for gas cooktops according to claim 1, characterized in that: the liquid outlet (31) of the flow guide channel (3) is arranged on the annular wall (22), and an annular liquid storage tank (4) communicated with the liquid outlet (31) is further arranged below the annular wall (22) and the liquid outlet (31).

3. Burner for gas cooktops according to claim 2, characterized in that: an ignition needle (5) is arranged at a position, close to an annular wall (22) of the inner ring fire cover (2), of the base (1), at least one ignition hole (221) is formed in the wall surface, corresponding to the ignition needle (5), of the annular wall (22), and an auxiliary ignition hole (222) communicated with the ignition hole (221) is formed in a position, close to the ignition hole (221), of the annular wall (22).

4. Burner for gas cooktops according to claim 3, characterized in that: the auxiliary ignition holes (222) are symmetrically arranged on two sides of the ignition hole (221).

5. Burner for gas cooktops according to claim 4, characterized in that: the base (1) is provided with a thermocouple (6) opposite to the ignition needle (5), the thermocouple (6) and the ignition needle (5) are positioned at two ends of the inner ring fire cover (2) in the diameter direction, the wall surface of the annular wall (22) corresponding to the thermocouple (6) is provided with at least one fire protection hole (223), and the position of the annular wall (22) adjacent to the fire protection hole (223) is provided with an auxiliary fire protection hole (224) communicated with the fire protection hole (223).

6. Burner for gas cooktops according to claim 5, characterized in that: the auxiliary fire protection holes (224) are symmetrically arranged on two sides of the fire protection hole (223).

7. Burner for gas cooktops according to claim 6, characterized in that: the annular wall (22) of the inner ring fire cover (2) is partially inwards retracted along the radial direction of the inner ring fire cover (2) on the first wall surface (225) where the ignition hole (221) and the auxiliary ignition hole (222) are located, the annular wall (22) of the inner ring fire cover (2) is also partially inwards retracted along the radial direction of the inner ring fire cover (2) on the second wall surface (226) where the fire protection hole (223) and the auxiliary fire protection hole (224) are located, and the lengths of the two inward retracted lengths are the same.

8. The burner for a gas range according to any one of claims 5 to 7, wherein: the annular wall (22) of the inner ring fire cover (2) partially extends outwards along the radial direction of the inner ring fire cover (2) to form a waterproof brim which is shielded above the ignition needle (5) and the thermocouple (6).

9. The burner for a gas range according to any one of claims 1 to 7, wherein: the liquid inlet (32) of the flow guide channel (3) is provided with one liquid inlet and is arranged in the center of the top wall (21).

10. Burner for gas cooktops according to claim 9, characterized in that: the center of the top wall (21) is lower than the outer periphery of the top wall (21).

11. Burner for gas cooktops according to claim 10, characterized in that: the flow guide channel (3) comprises a vertical main flow channel (33) and at least one horizontal flow dividing channel (34) communicated with the main flow channel (33), and the liquid inlet (32) corresponds to the main flow channel (33).

12. Burner for gas cooktops according to claim 11, characterized in that: the flow dividing channel (34) gradually expands outwards from inside to outside along the radial direction of the inner ring fire cover (2).

13. Burner for gas cooktops according to claim 12, characterized in that: the base (1) is provided with an inner ring gas channel (11) communicated with the central gas mixing chamber (23), and the flow dividing channel (34) can at least partially shield the gas outlet end (111) of the inner ring gas channel (11).

14. Burner for gas cooktops according to claim 13, characterized in that: the sectional area of the gas outlet end (111) of the inner ring gas channel (11) is gradually reduced from bottom to top, and the sectional area of the central gas mixing chamber (23) is larger than the sectional area of the uppermost part of the gas outlet end (111).

15. The burner for a gas range according to any one of claims 10 to 14, wherein: the annular liquid storage tank (4) comprises an inner side peripheral wall (41) and an outer side peripheral wall (42), wherein the outer side peripheral wall (42) gradually inclines upwards from outside to inside along the radial direction, and forms a liquid storage area together with the inner side peripheral wall (41).

16. The burner for a gas range according to any one of claims 1 to 7, wherein: the flame-retardant rubber composition is characterized by further comprising an outer ring flame cover (7), wherein the outer ring flame cover (2) is.

17. Burner for gas cooktops according to claim 16, characterized in that: the annular top wall (70) further comprises a second top wall (212) connected with the adjacent first top wall (211), the second top wall (212) is gradually inclined downwards from the outer periphery to the center, and a second outer fire hole (732) communicated with the outer ring gas mixing chamber (73) is formed in the position, corresponding to the second top wall (212), of the outer ring wall (72).