A burner for a gas stove

Abstract

The present invention relates to a burner for a gas stove, the burner comprises a base; a central channel, the central channel is a cylindrical structure with an opening facing upward, and is arranged at the center of the base; an outer ring gas channel is arranged at the peripheral part of the central channel of the base, and is arranged above the outer ring gas channel and forms an outer ring gas mixing chamber, and has an outer ring fire cover of a main fire part connected with the outer ring gas mixing chamber, characterized in that it also includes a movable part arranged in the central channel and a peripheral shielding part for shielding the main fire part, the movable part can be directly triggered when a pot is placed thereon, so as to expose the main fire part, the movable part also includes a partition part arranged in a secondary air supply channel, compared with the prior art, the advantage of the present invention is that the outer ring fire can be turned off by lifting the pot, and the problem that the stove fire is still burning during the intervals of adding seasonings and plating during the cooking process is overcome, thereby achieving the purpose of saving fuel and energy.

Description

Technical Field

[0001] The invention relates to the field of gas stoves, and in particular to a burner for a gas stove capable of turning off the fire by lifting a pot. Background Art

[0002] At present, large tabletop frying stoves and medium-pressure frying stoves often need to turn on the gas first, then use an ignition rod or an ignition gun to ignite, and finally turn on the air supply system before normal burning, frying and other tasks can be performed. The operation is very inconvenient, and during the intervals of adding seasonings, plating and repeating operations, the fire is still burning continuously, and the waste of oil and gas fuel is huge. The air supply system does not stop working, resulting in a waste of electricity. For this purpose, a Chinese invention patent "Fully Automatic Energy-Saving Stove" with patent number ZL200420034149.3 (publication number CN2731307Y) discloses a fully automatic energy-saving stove including a stove body, characterized in that it also includes a control rod and a follower stick, the follower stick is placed in the stove body, and can move up and down as the pot on the stove body is placed and lifted; the lower end of the follower stick is movably connected to the control rod in such a way that the lower end of the follower stick is connected to one end of the control rod, and the other end is rotatably fixed to the stove body. When the pot is placed on the stove, the follower stick is subjected to pressure and moves downward, causing the movable end of the control rod to move downward, thereby connecting the fuel control switch, the ignition control switch, and the blower control switch, connecting the supply of oil and gas fuel and igniting, turning on the blower, and starting the fully automatic energy-saving stove. When the pot is lifted, the follower moves upward, and the moving end of the control rod moves upward, disconnecting the fuel control switch, ignition control switch, and blower control switch, so that the fully automatic energy-saving stove stops working, thereby realizing ignition when the pot is put down and closing when the pot is lifted. The switch and ignition control switch are controlled by the up and down movement of the follower, but this control method has high requirements for the circuit part.

[0003] At present, when the burner is burning, due to the entrainment effect of the combustion hot air flow, the inner and outer fire covers will draw primary air and secondary air through the mixing chamber. In order to prevent the inner and outer rings from affecting each other when drawing secondary air and to achieve full combustion of the inner and outer rings at the same time, further improvements are needed. 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 effectively avoid the inner and outer rings from influencing each other when entraining secondary air 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 which can relatively simply realize the opening of an outer ring fire by placing a pot on the stove and can also effectively supplement secondary air during the cooking process.

[0006] The third technical problem to be solved by the present invention is to provide a burner for a gas stove which can change the size of the inner ring fire when the pot is placed in response to the above-mentioned existing technical status.

[0007] The fourth technical problem to be solved by the present invention is to provide a burner for a gas stove which can effectively improve the combustion efficiency in view of the above-mentioned existing technical status.

[0008] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the burner for the gas stove comprises:

[0009] Pedestal;

[0010] A central gas channel, which is a cylindrical structure with an opening facing upward and is arranged at the center of the base;

[0011] An inner ring fire cover is arranged on the inner ring gas passage and forms an inner ring gas mixing chamber, and has a fire outlet portion communicated with the inner ring gas mixing chamber;

[0012] An outer ring gas channel is arranged at the outer periphery of the central channel of the base;

[0013] An outer ring fire cover is arranged on the outer ring gas channel and forms an outer ring gas mixing chamber, and has a main fire part connected with the outer ring gas mixing chamber;

[0014] An air supplementation chamber is formed between the inner ring air mixing chamber and the outer ring air mixing chamber;

[0015] Secondary air supply channel: the base is also provided with a plurality of radial secondary air supply channels for connecting the air supply cavity with the outside at intervals along the circumferential direction;

[0016] Features:

[0017] A movable part is arranged in the central channel, including an outer shielding part for shielding the main fire part. The movable part can be directly triggered when the cookware is placed thereon, thereby exposing the main fire part, and the movable part also includes a partition part arranged in the secondary air supply channel, and the partition part can divide the secondary air supply channel into two relatively independent spaces, which are respectively connected to the main fire part area of ​​the outer ring air mixing chamber and the fire outlet area of ​​the central air mixing chamber.

[0018] Furthermore, the movable part is divided into three parts from bottom to top according to the change of cross section: a straight part adapted to the inner diameter of the central gas channel, a narrowed part and a contraction part with the bell mouth facing upward, and also includes a contraction part whose tail is elastically located at the drive rod, the head of the drive rod is exposed from the inner ring fire cover, and the central gas channel is provided with a fixed seat for the contraction part to move relative to it.

[0019] To solve the second technical problem, preferably, the partition is an annular partition wall, the partition wall is connected to the straight part by a first horizontal connecting rod, an inverted L-shaped partition extends from the top of the partition wall to the first horizontal connecting rod, the peripheral shielding member is a vertical shielding plate, the vertical shielding plate is connected to the side wall of the partition wall by a second horizontal connecting rod, the bottom of the partition wall extends downward toward the second connecting rod, and a horizontal partition extends toward the secondary air supply channel. In the process of the driving rod driving the contraction part to move downward relative to the fixed seat, thereby driving the peripheral shielding member to move downward, the top cover and the lower shielding part will move downward with the outer sleeve, wherein the top cover can at least partially block the fire outlet, thereby changing the gas outlet area of ​​the fire outlet, and at the same time can drive the partition to move downward, and the horizontal partition of the partition can divide the secondary air supply channel into two, effectively avoiding the hot air flow after combustion and the high temperature of the burner to supply the fire outlet area of ​​the fire outlet and the main fire outlet, and avoiding the mutual suction effect of the secondary air between the fire outlet and the main fire outlet.

[0020] In order to better realize the lifting of the pot and turning off the fire of the outer ring fire, preferably, the outer ring fire cover includes an annular component and an annular body arranged in the annular component, and the annular body has a main fire part which is connected with the outer ring air mixing chamber and can spray the mixed gas toward the inner ring fire cover.

[0021] The transmission component of the present invention also has a special design. Preferably, a transmission component for transmitting the gas in the outer ring gas channel to the annular component is arranged between the annular component and the outer ring gas channel. The transmission component includes an inner annular wall, an outer annular wall and a connecting wall connecting the inner annular wall and the outer annular wall which are concentrically arranged. The connecting wall is circumferentially provided with at least two vertical outer ring gas supply channels which are independent of the secondary gas supply channel and are used to supply secondary air to the main fire part. The connecting wall corresponds to the inner side of each vertical outer ring gas supply channel and is provided with a vertical connecting portion which is connected to the outer ring gas channel and a horizontal connecting portion which is located between two adjacent vertical connecting portions and extends radially outward. The secondary gas supply channel radially passes through the bottom of the connecting wall.

[0022] Furthermore, the transmission member is covered with an annular cover plate, which includes a first cover plate portion corresponding to the outer ring gas channel and a second cover plate portion corresponding to the horizontal connection portion, and gaps are formed between adjacent second cover plate portions for exposing the vertical outer ring gas supply channel, and the peripheral portion of each of the gaps is hinged with a third cover plate portion for covering the vertical outer ring gas supply channel. In order to enable the cookware to be placed on the movable member, thereby driving the outer shielding member to move downward, thereby exposing the main fire part, the third cover plate portion can also be pressed down at this time, so that the outer ring gas supply channel is exposed, and then the secondary air is added to the main fire part to promote the full combustion of the main fire part.

[0023] Preferably, the third cover plate is provided with an actuator that can actuate the third cover plate to open or close relative to the vertical outer ring air supply channel, and the actuator can actuate the rotation of the third cover plate when triggered by the downward movement of the peripheral shielding member. In order to better actuate the third cover plate, the setting of the actuator can better achieve the ability to drive the third cover plate to rotate when the peripheral shielding member moves downward, thereby exposing the outer ring air supply channel, thereby replenishing secondary air to the main fire part, and promoting full combustion of the main fire part.

[0024] Furthermore, the tube wall of the central gas channel has a through hole for the horizontal connecting rod to pass through, and the head of the driving rod can directly move downward relative to the contraction part when the cookware is placed thereon, thereby driving the contraction part to move downward relative to the fixed seat, and finally driving the outer shielding part to move downward relative to the main fire part, and the movable part has a cavity for the gas in the central gas channel to flow into, and the cavity is fluidically connected with the inner ring fire cover, and the wall of the movable part has at least one gas hole for the gas in the central gas channel to flow into, and the straight part restricts the gas to flow into the inner ring fire cover only through the gas hole.

[0025] Furthermore, an outer sleeve is provided on the periphery of the driving rod, and a limiting groove is provided in the center of the contraction portion for relative movement of the outer sleeve. The outer sleeve is integrally provided with the inner ring fire cover, and a first supporting rod is provided at the bottom of the limiting groove. A first elastic member is connected between the upper end of the first supporting rod and the lower end of the driving rod, and the outer sleeve is sleeved on the periphery of the first supporting rod and has a gap at the bottom of the limiting groove. The setting of the first elastic member enables the head of the driving rod to always have a tendency to be exposed at the top of the outer sleeve.

[0026] Furthermore, the bottom of the shrinkage portion has a radially inward shrinkage foot, and a second elastic member is sleeved on the shrinkage foot. The end of the second elastic member is connected to the central pipe of the fixed seat. The setting of the second elastic member makes the shrinkage portion always have a tendency to return to its original position.

[0027] To solve the third technical problem, preferably, the inner ring fire cover includes an annular wall connected to the top of the central gas channel, the fire outlet portion arranged on the annular wall, and a top cover covering the annular wall, the top cover is integrally arranged with the driving rod, and the head of the driving rod is exposed on the top cover.

[0028] Compared with the prior art, the advantage of the present invention is that when the cooker is placed on the central gas channel, the movable part moves downward under pressure, and at the same time drives the outer shielding part to move downward, thereby exposing the fire outlet for cooking; when the cooker is lifted up and leaves the central gas channel, the movable part moves upward again, and at the same time drives the outer shielding part to move upward, thereby realizing the closure of the outer ring fire by lifting the pot, overcoming the problem that the fire continues to burn during the intervals of adding seasonings and serving dishes during the cooking process, thereby achieving the purpose of saving fuel and energy; and the separating effect of the partition of the movable part in the process of moving downward can form two independent air supply channels, effectively avoiding the mutual suction effect of the hot air flow after combustion and the high temperature of the burner on the secondary air supplied to the main fire part and the fire outlet, thereby effectively improving the air supply effect, so that the flame of the burner is short, uniform and powerful, and no defects such as yellow flame and flashback will occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a burner in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A cross-sectional view of

[0031] Figure 3 A schematic diagram of the structure of a transmission component at one angle in an embodiment of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the transmission component in another angle in an embodiment of the present invention;

[0033] Figure 5 A cross-sectional view of a transmission member at one angle in an embodiment of the present invention;

[0034] Figure 6 is a cross-sectional view of the transmission member at another angle in the embodiment of the present invention;

[0035] Figure 7 It is a cross-sectional view of the burner in the embodiment of the present invention with the pot lifted and the outer ring fire closed;

[0036] Figure 8 It is a cross-sectional view of the burner in the cooking state (the pot is placed on the stove and the outer ring fire is turned on) according to the embodiment of the present invention;

[0037] Fig. 9 for Figure 8 The cross-sectional view of the movable parts is omitted;

[0038] Fig.10 A schematic diagram of the structure of a movable part at one angle in an embodiment of the present invention;

[0039] Fig.11 for Fig.10 A cross-sectional view of the movable part at another angle;

[0040] Fig.12 Schematic diagram of the structure of the annular cover plate in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below with reference to the accompanying drawings.

[0042] like Figures 1 to 12 As shown, it is the best embodiment of the present invention. The burner for the gas stove in this embodiment includes a base 1, a central gas channel 11 arranged at the center of the base 1, the central gas channel 11 is a cylindrical structure with an opening facing upward, an inner ring fire cover 4 arranged on the central gas channel 11 and formed with an inner ring gas mixing chamber 41, the inner ring fire cover 4 has a fire outlet 42 connected to the inner ring gas mixing chamber 41; and an outer ring gas channel 12 arranged at the peripheral part of the central gas channel 11 of the base 1, and also includes an outer ring fire cover 2 arranged on the outer ring gas channel 12 and formed with an outer ring gas mixing chamber 21, the outer ring fire cover 2 has a main fire part 22 connected to the outer ring gas mixing chamber 21; wherein the inner ring gas mixing chamber 41 and the outer ring gas mixing chamber 41 are connected to each other. An air supply cavity 500 is formed between the annular mixing chambers 21, and a plurality of radial secondary air supply channels 400 for connecting the air supply cavity 500 with the external secondary air supply channels 400 are also provided on the base 1 at intervals along the circumferential direction, wherein a movable part 3 is provided in the central gas channel 11, and the movable part 3 includes an outer shielding part 3a for shielding the main fire part 22, and the movable part 3 can be directly triggered when the pot is placed thereon, so as to expose the main fire part 22, and the movable part 3 also includes a partition 30 arranged in the secondary air supply channel 400, and the partition 30 can divide the secondary air supply channel 400 into two relatively independent spaces, which are respectively connected to the main fire part 22 area of ​​the outer annular mixing chamber 21 and the fire outlet part 42 area of ​​the inner annular mixing chamber 41. When the cooker is placed on the central gas passage 11, the movable part 3 moves downward under pressure, and at the same time drives the outer shielding part 3a to move downward, thereby exposing the fire outlet 42 for cooking; when the cooker is lifted up and leaves the central gas passage 11, the movable part 3 moves upward again, and at the same time drives the outer shielding part 3a to move upward, so as to realize the closing of the outer ring fire by lifting the cooker, thereby overcoming the problem that the fire is still burning during the intervals of adding seasonings and serving dishes during the cooking process, thereby achieving the purpose of saving fuel and energy; and the partitioning effect of the partition 30 of the movable part 3 during the downward movement can form two independent air supply channels, thereby effectively preventing the hot air flow after combustion and the high temperature of the burner from producing mutual suction effect on the secondary air supplied to the main fire part 22 and the fire outlet 42, thereby effectively improving the air supply effect, thereby making the flame of the burner short, uniform and powerful, and without defects such as yellow flame and flashback.

[0043] Specifically, the movable part 3 is divided into three parts from bottom to top according to the change of the cross section: a straight part 31 adapted to the inner diameter of the central gas channel 11, a narrowing part 32 and a contraction part 33 with the bell mouth facing upward, and also includes the contraction part 33 whose tail is elastically located at the driving rod 34, the head of the driving rod 34 is exposed to the inner ring fire cover 4, and the central gas channel 11 is provided with a fixing seat 111 that can allow the contraction part 33 to move relative to it. The partition 30 of this embodiment is an annular partition wall, the partition wall and the straight part 31 are connected by a first horizontal connecting rod 5d, and an inverted L-shaped partition 301 is extended from the top of the partition wall to the first horizontal connecting rod 5d. The peripheral shielding member 3a is a vertical shielding plate, and the vertical shielding plate is connected to the side wall of the partition wall by a second horizontal connecting rod 5a. The bottom of the partition wall extends downward toward the second horizontal connecting rod 5a, and a horizontal partition 301a is extended toward the secondary air supply channel 400. In the process that the driving rod 34 drives the contraction part 33 to move downward relative to the fixed seat 111, thereby driving the outer shielding part 3a to move downward, the top cover 401 and the lower shielding part will move downward with the outer sleeve 5, wherein the top cover 401 can at least partially block the fire outlet 42, thereby changing the gas outlet area of ​​the fire outlet 42, and at the same time can drive the partition 30 to move downward. The horizontal partition 301a of the partition 30 can divide the secondary air supply channel 400 into two, effectively avoiding the hot air flow after combustion and the high temperature of the burner to supply the fire outlet area of ​​the fire outlet 42 and the main fire outlet 22, and avoiding the mutual suction effect of the secondary air between the fire outlet 42 and the main fire outlet 22. In order to better realize the outer ring fire, the outer ring fire cover 2 includes an annular component 23 and an annular body 24 arranged in the annular component 23, and the annular body 24 has a main fire part 22 that is connected to the outer ring mixing chamber 21 and can spray the mixed gas toward the inner ring fire cover 4. The transmission member 600 of the present embodiment also has a special design. A transmission member 600 for transmitting the gas in the outer ring gas channel 12 to the annular member 23 is arranged between the annular member 23 and the outer ring gas channel 12. The transmission member 600 includes an inner ring wall 6001, an outer ring wall 6002 and a connecting wall 6003 connecting the inner ring wall 6001 and the outer ring wall 6002 which are arranged concentrically and spaced apart. The connecting wall 6003 is circumferentially provided with at least two vertical outer ring gas supply channels 6004 which are independent of the secondary gas supply channel 400 and are used to supply secondary air to the main fire part 22. The connecting wall 6003 is provided with a vertical connecting portion 6005 connected to the outer ring gas channel 12 and a horizontal connecting portion 6006 located between two adjacent vertical connecting portions 6005 and extending radially outward on the inner side of each vertical outer ring gas supply channel 6004. The secondary gas supply channel 400 radially penetrates the bottom of the connecting wall 6003.The transmission member 600 is covered with an annular cover plate 700, which includes a first cover plate portion 7001 corresponding to the outer ring gas channel 12 and a second cover plate portion 7002 corresponding to the horizontal connection portion 6006. A notch 7003 is formed between adjacent second cover plate portions 7002 for exposing the vertical outer ring gas supply channel 6004. The peripheral portion of each notch 7003 is hinged with a third cover plate portion 7004 for covering the vertical outer ring gas supply channel 6004. In order to enable the cookware to be placed on the movable member 3, thereby driving the outer shielding member 3a to move downward, so as to expose the main fire part 22, the third cover plate portion 7004 can also be pressed down at this time to expose the outer ring gas supply channel, thereby replenishing secondary air to the main fire part 22 and promoting full combustion of the main fire part 22. Preferably, the third cover plate portion 7004 is provided with an actuator 800 which can actuate the third cover plate portion 7004 to open or close relative to the vertical outer ring air supply channel 6004. The actuator 800 can actuate the rotation of the third cover plate portion 7004 when triggered by the downward movement of the peripheral covering member 3a. In order to better actuate the third cover plate portion 7004, the setting of the actuator 800 can better drive the third cover plate portion 7004 to rotate when the peripheral covering member 3a moves downward, thereby exposing the outer ring air supply channel, thereby supplementing the secondary air to the main fire portion 22, and promoting the full combustion of the main fire portion 22. The tube wall of the central gas channel 11 also has a through hole 110 for the horizontal connecting rod to pass through. The head of the driving rod 34 can directly move downward relative to the contraction part 33 when the cookware is placed thereon, and then drive the contraction part 33 to move downward relative to the fixed seat 111, and finally drive the outer shielding part 3a to move downward relative to the main fire part 22. The movable part 3 has a cavity 321 for the gas in the central gas channel 11 to flow into, and the cavity 321 is fluidically connected with the inner ring fire cover 4, and the wall of the movable part 3 has at least one gas hole 322 for the gas in the central gas channel 11 to flow into, and the straight part 31 limits the gas to only flow into the inner ring fire cover 4 through the gas hole 322. In addition, an outer sleeve 5 is provided on the periphery of the driving rod 34, and a limiting groove 331 is provided in the center of the contraction part 33 for relative movement of the outer sleeve 5. The outer sleeve 5 is integrally provided with the inner ring fire cover 4, and a first support rod 6 is provided at the bottom of the limiting groove 331. A first elastic member 7 is connected between the upper end of the first support rod 6 and the lower end of the driving rod 34. The outer sleeve 5 is sleeved on the periphery of the first support rod 6 and has a gap at the bottom of the limiting groove 331. The provision of the first elastic member 7 enables the head of the driving rod 34 to always have a tendency to be exposed at the top of the outer sleeve 5. The bottom of the contraction part 33 has a contraction foot 332 that contracts inward in the radial direction, and a second elastic member 8 is sleeved on the contraction foot 332. The end of the second elastic member 8 is connected to the central pipe of the fixing seat 111. The provision of the second elastic member 8 enables the contraction part 33 to always have a tendency to return to the original position.In addition, the inner ring fire cover 4 includes an annular wall 400 connected to the top of the central gas channel 11, a fire outlet 42 arranged on the annular wall 400, and a top cover 401 covering the annular wall 400. The top cover 401 is integrally arranged with the driving rod 34, and the head of the driving rod 34 is exposed on the top cover 401.

Claims

1. A burner for a gas stove, the burner comprising: Base (1); A central gas channel (11), the central gas channel (11) being a cylindrical structure with an opening facing upward and arranged at the center of the base (1); An inner ring fire cover (4) is arranged on the central gas channel (11) and forms an inner ring gas mixing chamber (41), and has a fire outlet (42) connected to the inner ring gas mixing chamber (41); An outer ring gas channel (12) is arranged at the outer periphery of the central gas channel (11) of the base (1); An outer ring fire cover (2) is arranged on the outer ring gas channel (12) and forms an outer ring gas mixing chamber (21), and has a main fire part (22) connected to the outer ring gas mixing chamber (21); An air supplementation chamber (500) is formed between the inner annular air mixing chamber (41) and the outer annular air mixing chamber (21); A secondary air supply channel (400), wherein the base (1) is also provided with a plurality of radial secondary air supply channels (400) spaced apart along the circumferential direction for connecting the air supply cavity (500) with the outside; Features: A movable part (3) is arranged in the central gas passage (11), and includes a peripheral shielding part (3a) for shielding the main fire part (22). The movable part (3) can be directly triggered when a cooker is placed thereon, thereby exposing the main fire part (22). The movable part (3) also includes a partition (30) arranged in the secondary gas supply passage (400). The partition (30) can separate the secondary gas supply passage (400) into two relatively independent spaces, which are respectively connected to the main fire part (22) area of ​​the outer ring gas mixing chamber (21) and the fire outlet part (42) area of ​​the inner ring gas mixing chamber (41); The movable part (3) is divided into three parts from bottom to top according to the change of the cross section: a straight part (31) adapted to the inner diameter of the central gas channel (11), a narrowed part (32) and a contraction part (33) with a bell mouth facing upward, and also includes a driving rod (34) whose tail is elastically located in the contraction part (33), the head of the driving rod (34) is exposed outside the inner ring fire cover (4), and the central gas channel (11) is provided with a fixed seat (111) capable of allowing the contraction part (33) to move relative to it.

2. The burner for a gas stove according to claim 1, characterized in that: The partition (30) is an annular partition wall, the partition wall is connected to the straight portion (31) via a first horizontal connecting rod (5d), an inverted L-shaped partition (301) is extended from the top of the partition wall toward the first horizontal connecting rod (5d), the peripheral shielding member (3a) is a vertical shielding plate, the vertical shielding plate is connected to the side wall of the partition wall via a second horizontal connecting rod (5a), the bottom of the partition wall extends downward toward the second horizontal connecting rod (5a), and a horizontal partition (301a) is extended toward the secondary air supply channel (400).

3. The burner for a gas stove according to claim 2, characterized in that: The outer ring fire cover (2) comprises an annular component (23) and an annular body (24) arranged in the annular component (23); the annular body (24) has a main fire part (22) which is connected to the outer ring gas mixing chamber (21) and can spray mixed gas toward the inner ring fire cover (4).

4. The burner for a gas stove according to claim 3, characterized in that: A transmission member (600) is provided between the annular member (23) and the outer annular gas channel (12) for transmitting the gas in the outer annular gas channel (12) to the annular member (23). The transmission member (600) comprises an inner annular wall (6001), an outer annular wall (6002) and a connecting wall (6003) connecting the inner annular wall (6001) and the outer annular wall (6002) arranged concentrically and spaced apart. The connecting wall (6003) is provided with at least two circumferentially extending portions which are independent of the secondary gas supply channel (400). ), and a vertical outer ring air supply channel (6004) for supplying secondary air to the main fire part (22); the connecting wall (6003) is provided with a vertical connecting portion (6005) connected to the outer ring gas channel (12) and a horizontal connecting portion (6006) located between two adjacent vertical connecting portions (6005) and extending radially outward on the inner side of each vertical outer ring air supply channel (6004); and the secondary air supply channel (400) radially penetrates the bottom of the connecting wall (6003).

5. The burner for a gas stove according to claim 4, characterized in that: The transmission member (600) is covered with an annular cover plate (700), and the annular cover plate (700) includes a first cover plate portion (7001) corresponding to the outer ring gas channel (12) and a second cover plate portion (7002) corresponding to the horizontal connecting portion (6006), and gaps (7003) are formed between adjacent second cover plate portions (7002) for exposing the vertical outer ring air supply channel (6004), and the peripheral portion of each of the gaps (7003) is hinged with a third cover plate portion (7004) for covering the vertical outer ring air supply channel (6004).

6. The burner for a gas stove according to claim 5, characterized in that: The third cover plate portion (7004) is provided with an actuating member (800) capable of actuating the third cover plate portion (7004) to open or close relative to the vertical outer ring air supply channel (6004); the actuating member (800) can actuate the rotation of the third cover plate portion (7004) when triggered by the downward movement of the peripheral shielding member (3a).

7. The burner for a gas stove according to any one of claims 4 to 6, characterized in that: The tube wall of the central gas channel (11) has a through hole (110) for the first horizontal connecting rod (5d) to pass through, and the head of the driving rod (34) can directly move downward relative to the contraction part (33) when the cookware is placed thereon, thereby driving the contraction part (33) to move downward relative to the fixed seat (111), and finally driving the outer shielding part (3a) to move downward relative to the main fire part (22). The movable part (3) has a cavity (321) for the gas in the central gas channel (11) to flow in, and the cavity (321) is fluidically connected with the inner ring fire cover (4), and the wall of the movable part (3) has at least one gas hole (322) for the gas in the central gas channel (11) to flow in, and the straight part (31) limits the gas to only flow into the inner ring fire cover (4) through the gas hole (322).

8. The burner for a gas stove according to claim 7, characterized in that: An outer sleeve (5) is arranged on the periphery of the driving rod (34), and a limiting groove (331) is provided in the center of the contraction portion (33) for relative movement of the outer sleeve (5). The outer sleeve (5) is integrally arranged with the inner ring fire cover (4), and a first supporting rod (6) is arranged at the bottom of the limiting groove (331). A first elastic member (7) is connected between the upper end of the first supporting rod (6) and the lower end of the driving rod (34). The outer sleeve (5) is sleeved on the periphery of the first supporting rod (6) and has a gap between the bottom of the limiting groove (331). The setting of the first elastic member (7) enables the head of the driving rod (34) to always have a tendency to be exposed at the top of the outer sleeve (5).

9. The burner for a gas stove according to claim 8, characterized in that: The bottom of the contraction portion (33) has a contraction foot (332) that contracts inwardly in the radial direction, and a second elastic member (8) is sleeved on the contraction foot (332). The end of the second elastic member (8) is connected to the central pipe of the fixing seat (111). The arrangement of the second elastic member (8) enables the contraction portion (33) to always have a tendency to return to its original position.

10. The burner for a gas stove according to claim 9, characterized in that: The inner ring fire cover (4) includes an annular wall connected to the top of the central gas channel (11), the fire outlet (42) arranged on the annular wall, and a top cover (401) covering the annular wall. The top cover (401) is integrally arranged with the drive rod (34), and the head of the drive rod (34) is exposed from the top cover (401). The inner wall of the central gas channel (11) has a groove (112) extending radially inward. The bottom of the groove (112) is connected to a third elastic member (9). The upper end of the third elastic member (9) is connected to the top cover (401). The third elastic member (9) enables the top cover (401) to always have a tendency to return to be flush with the top opening of the central gas channel (11).

11. The burner for a gas stove according to claim 9, characterized in that: The driving rod (34) is a temperature sensor.

12. The burner for a gas stove according to claim 11, characterized in that: An energy gathering cover is provided on the annular component (23) of the outer ring fire cover (2).

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