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 gas channel and an inner ring fire cover arranged on the central gas channel, and is characterized in that: it also comprises a movable part at least partially arranged in the central gas channel, the movable part comprises a shielding part for shielding a fire outlet and a diversion chamber connected to the shielding part and located at the periphery of the inner ring fire cover, the movable part can be directly triggered when a pot is placed thereon, so as to change the air intake area of ​​the fire outlet and at the same time divert the gas in the central gas channel to the diversion chamber. Compared with the prior art, the advantage of the present invention is that when the pot, especially the pointed bottom pot, is placed on the central channel, the movable part is pressed downward by the pressure, so as to avoid the inner ring fire cover being pressed by the pot and the fire-out phenomenon caused by excessive pressure in the central channel, and when the pot is lifted up and leaves the central channel, the movable part moves upward again.

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 ignition gun to ignite, and finally turn on the air supply system before normal burning, frying and other tasks can be carried out. The operation is very inconvenient, and during the intervals of adding seasonings, loading plates 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 reason, the applicant applied for a Chinese utility model patent with patent number ZL202021025751.6 (publication number CN213237521U) "A burner for a gas stove" discloses a burner, which includes a base, a central channel with an upward opening and a cylindrical structure, the central channel is arranged in the central part of the base, and an outer ring gas channel is also arranged on the outer periphery of the central channel of the base, the outer ring gas channel is arranged on the outer ring gas channel and forms an outer ring gas mixing chamber, and 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 the pot is placed on it, thereby exposing the main fire part. Although it can adapt to pointed bottom pots and overly pointed bottom pots while realizing the outer ring fire closure by lifting the pot, so that it can maintain an appropriate distance from the inner ring fire cover to avoid fire compression, but when it maintains an appropriate distance from the inner ring fire cover, it will increase the mixed gas pressure in the mixing chamber corresponding to the inner ring fire cover, thereby causing the flame formed by the inner ring fire cover to be too long. That is, if the speed of the mixed gas sprayed through the fire hole is greater than a predetermined speed, flame separation will occur outside the fire hole. As the airflow at the outlet continues to increase, flameout will occur. Further improvements are needed for this. Summary of the invention

[0003] The first technical problem to be solved by the present invention is to provide a burner for a gas stove that can avoid the flameout phenomenon in view of the above-mentioned existing technical status, and is particularly suitable for a pointed bottom pot.

[0004] The second technical problem to be solved by the present invention is to provide a burner for a gas stove that can avoid the occurrence of flameout while avoiding the "snatching" of secondary air in the inner and outer rings in response to the above-mentioned existing technical status.

[0005] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the burner for the gas stove comprises:

[0006] Pedestal;

[0007] A central gas channel, which is a cylindrical structure with an opening facing upward and is arranged at the center of the base;

[0008] An inner ring fire cover is arranged on the central gas passage and forms an inner ring gas mixing chamber, and has a fire outlet portion connected to the inner ring gas mixing chamber;

[0009] Features:

[0010] The movable part is at least partially arranged in the central gas channel, and includes a shielding part for shielding the fire outlet and a diversion chamber connected to the shielding part and located at the periphery of the inner ring fire cover. The movable part can be directly triggered when the cookware is placed thereon, thereby changing the air intake area of ​​the fire outlet and at the same time diverting the gas in the central gas channel to the diversion chamber.

[0011] In order to realize that the movable part can change the air intake area of ​​the fire outlet of the inner ring fire cover, preferably, the inner ring fire cover includes an inner ring wall and an outer ring wall arranged at intervals inside and outside, the inner ring wall surrounds a central cavity, the inner ring wall and the outer ring wall together surround an outer peripheral cavity for the movable part to move, the inner ring wall is connected to the outer ring wall through connecting ribs arranged at intervals along the circumferential direction, and a first elastic part is connected between the movable part and each connecting rib so that it can always return to the initial state, and the fire outlet is opened on the outer ring wall. The movable part can be directly triggered by the action of placing the pot on it and move down along the outer peripheral cavity, thereby driving the shielding part to move down to reduce the air intake area of ​​the fire outlet, and when the user lifts the pot, the movable part can return to the initial state under the action of the first elastic part.

[0012] In addition to changing the air intake area of ​​the inner ring fire cover, the gas in the central gas channel can also be diverted to the diversion chamber. Preferably, the diversion chamber includes a connecting port connected to the outer peripheral cavity, a peripheral wall arranged opposite to the connecting port, and a bottom wall and a top wall connecting the connecting port and the peripheral wall. At least two fire holes are provided on the top wall. Correspondingly, the wall portion of the central gas channel is provided with an air outlet staggered with the connecting port of the diversion chamber. The movable part can move downward when triggered by the action of placing the cookware on it, so that the connecting port is connected to the air outlet.

[0013] In order to realize the connection between the movable part and the diversion chamber, preferably, the shielding part of the movable part is connected to the diversion chamber by a connecting part with an "L"-shaped cross-section, and the connecting part includes a vertical part that moves in the outer peripheral cavity and a transverse part connecting the vertical part and the connecting port, and the transverse part passes through the connecting port of the diversion chamber.

[0014] In order to be able to more adaptably divert the gas in the central gas channel to the diversion chamber, preferably, a switch member capable of opening and closing the communication port and a second elastic member connected to the switch member are provided on the transverse portion of the movable member, and the second elastic member enables the switch member to always have a tendency to close the communication port. When the gas pressure in the central gas channel is too low, although the movable member moves downward under the action of the pot placed on it, it is still not enough to open the switch member, which solves the adaptability problem of the diversion chamber when the gas pressure in the central gas channel is too low, so as to meet the normal ignition of the inner ring fire cover to the greatest extent.

[0015] From the perspective of structural simplicity, preferably, the switch element is plate-shaped, and the second elastic element is a compression spring, one end of which is connected to the switch element, and the other end is connected to the inner side of the peripheral wall of the diversion chamber.

[0016] In order to better adapt to the pointed bottom pot or the pointed bottom pot and prevent the bottom of the pointed bottom pot or the pointed bottom pot from pressing the inner ring fire cover, preferably, the center of the shielding part has a rod body for the pot to be placed on, and the rod body enables the shielding part to maintain a preset distance from the pot. The provision of the rod body can compensate for the pointed part of the pointed bottom pot or the pointed bottom pot.

[0017] In order to enable the burner to achieve multi-ring fire, preferably, the wall of the central gas channel is further provided with a connector below the gas outlet, the connector is used to connect the outer ring gas mixing chamber located outside the diverter chamber, and the connector also has a shelf for the diverter chamber to rest. When the movable body moves downward, the diverter chamber can rest on the shelf to improve the stability of the pot placement.

[0018] In order to realize that the connecting body is used to place the diversion chamber and is also conducive to setting up an outer annular air mixing chamber, preferably, the connecting body includes a first plate body, the center of the first plate body has a limiting opening for limiting the central gas channel, and the peripheral portion of the limiting opening is spaced apart with annular protrusions protruding from the surface of the first plate body, wherein a first portion of the first plate body between the annular protrusion and the peripheral portion of the limiting opening constitutes the placing portion, and a convex wall extends upward from the outer edge of the first plate body, an annular component is placed on the convex wall and the annular protrusion, a second portion of the first plate body between the annular protrusion and the convex wall, the convex wall, the annular protrusion and the annular component together constitute the outer annular air mixing chamber, and the annular component has a flame port connected to the outer annular air mixing chamber to eject the mixed gas.

[0019] To solve the second technical problem, preferably, the connecting body also includes a second plate body located under the first plate body, the second plate body is connected to the first plate body by a spacer portion arranged along the circumferential direction, a secondary air channel connected to the outside is formed between adjacent spacers, each secondary air channel is aligned with each of the shelf portions, the inner edge of the second plate body is against the central gas channel, and correspondingly, the chamber of the movable part between adjacent diversion chambers faces the secondary air channel, the chamber includes a vertical wall parallel to the central gas channel and a transverse wall extending toward the secondary air channel, the transverse wall and the vertical wall together constitute a first separation space separating the secondary air channel, and the vertical wall and the central gas channel together constitute a second separation space separating the secondary air channel, the first separation space is used to replenish secondary air to the annular component, and the second separation space is used to replenish secondary air to the inner ring fire cover. Through the structural coordination design of the movable body, the diversion chamber and the cavity connected to the secondary air channel are separated. When the cookware, especially the pointed bottom pot, is placed on the central channel, the movable part moves downward under pressure, and the gas can flow into the diversion chamber to avoid the inner ring fire cover being pressed by the pot and the fire-out caused by excessive pressure in the central channel. At the same time, the movable part can also separate the secondary air channel due to the cavity during the process of being pressed down, forming a separation space for replenishing secondary air to the inner ring fire cover and the annular component, so that the inner ring fire cover and the annular component can avoid "snatching" of secondary air during the combustion process.

[0020] Furthermore, the annular component is composed of an upper ring body and a lower ring body arranged up and down, wherein the upper ring body includes a first annular edge that abuts against the convex ring, and correspondingly, the lower ring body is "L"-shaped, including a horizontal portion that abuts against the annular convex ring and an inclined portion corresponding to the upper ring body, and the second part of the first plate body is provided with an abutting portion for abutting against the horizontal portion of the lower ring body, and the gap between the upper ring body and the inclined portion constitutes the flame port, and at least two layers of thin sheet metal sheets and a corrugated fire cover sheet arranged between the thin sheet metal sheets are provided in the flame port. In addition to the above-mentioned sheet metal annular seam fire cover, the annular component can also use the structure of a conventional annular fire cover in the prior art.

[0021] Compared with the prior art, the advantages of the present invention are: when the pot, especially the pointed bottom pot, is placed on the central channel, the movable part moves downward under pressure, avoiding the inner ring fire cover being pressed by the pot and the fire-out caused by excessive pressure in the central channel; when the pot is lifted out of the central channel, the movable part moves upward again, realizing adaptive adjustment during the cooking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the burner in Example 1 of the present invention;

[0023] Figure 2 It is a cross-sectional view of the burner in the embodiment 1 of the present invention in a state where the burner is not in the pot;

[0024] Figure 3 It is a cross-sectional view of the burner in the embodiment 1 of the present invention in the pot-sitting state and the gas pressure can force the gas to split;

[0025] Figure 4 This is a schematic diagram of the structure of the inner ring fire cover in Example 1 of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the movable part in Embodiment 1 of the present invention;

[0027] Figure 6 for Figure 5 A cross-sectional view of

[0028] Figure 7 is a schematic diagram of the structure of the connector in Example 1 of the present invention;

[0029] Figure 8 for Figure 7 A cross-sectional view of

[0030] Fig. 9 is a cross-sectional view of a burner in a state where the secondary air passage is not divided in Embodiment 2 of the present invention;

[0031] Fig.10 It is a cross-sectional view of the burner in the state of separating the secondary air passage in Embodiment 2 of the present invention;

[0032] Fig.11 is a cross-sectional view of a movable part in Embodiment 2 of the present invention;

[0033] Fig.12 It is a cross-sectional view of the connector in Example 2 of the present invention. DETAILED DESCRIPTION

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

[0035] Example 1

[0036] like Figures 1 to 8As 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, and the central gas channel 11 is a cylindrical structure with an opening facing upward, which is arranged at the center of the base 1 and an inner ring fire cover 2 arranged above the central gas channel 11. An inner ring gas mixing chamber 21 is formed between the inner ring fire cover 2 and the central gas channel 11, and a fire outlet 22 connected to the inner ring gas mixing chamber 21 is provided. At the same time, a movable part 3 is at least partially provided in the central gas channel 11, and the movable part 3 includes a shielding part 31 for shielding the fire outlet 22. As well as a diversion chamber 32 connected to the shielding portion 31 and located on the periphery of the inner ring fire cover 2, the movable part 3 can be directly triggered when the cookware is placed thereon, thereby changing the air intake area of ​​the fire outlet portion 22 while diverting the gas in the central gas channel 11 to the diversion chamber 32. When the cookware, especially the pointed bottom cookware, is placed on the central channel, the movable part 3 moves downward under pressure to prevent the inner ring fire cover 2 from being pressed and the fire from being out of control due to excessive pressure in the central channel. When the cookware is lifted up and leaves the central channel, the movable part 3 moves upward again, thereby realizing adaptive adjustment during the cooking process.

[0037] Specifically, in order to enable the movable part 3 to change the air intake area of ​​the fire outlet portion 22 of the inner ring fire cover 2, the inner ring fire cover 2 of the present embodiment includes an inner ring wall 23 and an outer ring wall 24 which are spaced apart inside and outside, the inner ring wall 23 encloses a central cavity 231, the inner ring wall 23 and the outer ring wall 24 together enclose a peripheral cavity 241 for the movable part 3 to move, the inner ring wall 23 is connected to the outer ring wall 24 by connecting ribs 4 which are spaced apart along the circumferential direction, a first elastic part 5 is connected between the movable part 3 and each connecting rib 4 so that it can always return to its initial state, and the fire outlet portion 22 is opened on the outer ring wall 24. The movable part 3 can be directly triggered when the cookware is placed thereon and move downward along the outer peripheral cavity 241, thereby driving the shielding part 31 to move downward to reduce the air intake area of ​​the fire outlet 22. When the user lifts the cookware, the movable part 3 can return to its initial state under the action of the first elastic part 5. In addition to changing the air intake area of ​​the inner ring fire cover 2, the gas in the central gas channel 11 can be diverted to the diversion chamber 32, wherein the diversion chamber 32 includes a connecting port 321 connected to the outer peripheral cavity 241, a peripheral wall 322 arranged opposite to the connecting port 321, and a bottom wall 323 and a top wall 324 connecting the connecting port 321 and the peripheral wall 322, and the top wall 324 has an opening At least two fire holes 3241 are provided. Correspondingly, the wall of the central gas channel 11 is provided with air outlets 111 which are staggered with the connecting port 321 of the diversion chamber 32. The movable part 3 can move downward when triggered by the action of placing the cookware thereon, so that the connecting port 321 is connected with the air outlet 111. In order to realize the connection between the movable part 3 and the diversion chamber 32, the shielding part 31 of the movable part 3 is connected to the diversion chamber 32 by a connecting part 6 with an "L"-shaped cross-section. The connecting part 6 includes a vertical part 61 that moves in the outer peripheral cavity 241 and a transverse part 62 that connects the vertical part 61 and the connecting port 321. The transverse part 62 passes through the connecting port 321 of the diversion chamber 32. In addition, in order to be able to more adaptably divert the gas in the central gas channel 11 to the diversion chamber 32, a switch member 7 capable of opening and closing the connecting port 321 and a second elastic member 8 connected to the switch member 7 are provided on the transverse portion 62 of the movable member 3 of the present embodiment. The second elastic member 8 enables the switch member 7 to always have a tendency to close the connecting port 321. When the gas pressure in the central gas channel 11 is too low, although the movable member 3 moves downward under the action of the cookware placed thereon, it is still not enough to open the switch member 7. This solves the adaptability problem of the diversion chamber 32 when the gas pressure in the central gas channel 11 is too low, so as to maximize the normal ignition of the inner ring fire cover 2. From the perspective of simple structure, the switch member 7 is preferably plate-shaped, and the second elastic member 8 is a compression spring, one end of which is connected to the switch member 7, and the other end is connected to the inner side of the peripheral wall 322 of the diversion chamber 32.

[0038] In order to better adapt to the pointed bottom pot or the pointed bottom pot, and to prevent the bottom of the pointed bottom pot or the pointed bottom pot from pressing the inner ring fire cover 2, the center of the shielding part 31 has a rod body 9 for the pot to be placed on, and the rod body 9 keeps a preset distance between the shielding part 31 and the pot. The setting of the rod body 9 can compensate for the pointed part of the pointed bottom pot or the pointed bottom pot, thereby avoiding fire compression. In order to enable the burner to achieve multi-ring fire and improve the stability of the pot placement when moving down, correspondingly, the wall of the central gas channel 11 is also provided with a connector 10 below the gas outlet 111, and the connector 10 is used to connect the outer ring gas mixing chamber 20 located on the periphery of the diverter chamber 32, and the connector 10 also has a shelf 101 for the diverter chamber 32 to be placed. When the movable body moves downward, the diverter chamber 32 can be placed on the shelf 101 to improve the stability of the pot placement. In order to realize that the connecting body 10 is used to place the diversion chamber 32 and is also conducive to setting up the outer annular mixing chamber 20, the connecting body 10 includes a first plate body, the center of the first plate body has a limiting opening 102 for limiting the central gas channel 11, and the peripheral portion of the limiting opening 102 is spaced apart with annular protrusions 103 protruding from the surface of the first plate body, wherein a first portion 104 of the first plate body between the annular protrusion 103 and the peripheral portion of the limiting opening 102 constitutes a placing portion 101, and a convex wall 105 extends upward from the outer edge of the first plate body, and an annular component 30 is placed on the convex wall 105 and the annular protrusion 103, a second portion 106 of the first plate body between the annular protrusion 103 and the convex wall 105, the convex wall 105, the annular protrusion 103 and the annular component 30 together constitute the outer annular mixing chamber 20, and the annular component 30 has a flame port 300 connected to the outer annular mixing chamber 20 to eject the mixed gas. Taking the sheet metal annular seam fire cover as an example, the annular component 30 is composed of an upper ring body 301 and a lower ring body 302 arranged up and down, wherein the upper ring body 301 includes a first annular edge 3011 that abuts against the convex ring, and correspondingly, the lower ring body 302 is "L"-shaped, including a horizontal portion 3021 that abuts against the annular convex ring 103 and an inclined portion 3022 corresponding to the upper ring body 301, and the second part 106 of the first plate body is provided with an abutting portion 1061 for abutting against the horizontal portion 3021 of the lower ring body 302, and the gap between the upper ring body 301 and the inclined portion 3022 constitutes a flame port 300, and at least two layers of thin sheet metal sheets 303 and a corrugated fire cover sheet 304 arranged between the thin sheet metal sheets 303 are arranged in the flame port 300. In addition to the above-mentioned sheet metal annular seam fire cover, the annular component 30 can also use the structure of a conventional annular fire cover in the prior art.

[0039] In summary, the burner is suitable for pointed bottom pots or pointed bottom pots in the following situations during use:

[0040] a. When the gas pressure in the central gas channel 11 is too low: only when the pointed-bottom pot or the pointed-bottom pot is placed on the rod body 9, the movable member 3 is triggered to move downward, and the vertical portion 61 of the connecting member 6 moves downward along the peripheral cavity 241, while the horizontal portion 62 drives the diversion chamber 32 to move downward to the placing portion 101 of the connecting body 10. At this time, the gas pressure in the central gas channel 11 is still insufficient to open the switch member 7;

[0041] b. When the gas pressure in the central gas channel 11 is too high: the gas pressure in the central gas channel 11 can force the switch member 7 to move toward the diversion chamber 32, so that the gas in the central gas channel 11 can be diverted to the diversion chamber 32 and flow out from the fire outlet 3241 opened on the top wall 324 of the diversion chamber 32, and burn together with the external secondary air to form a middle ring fire; and the thin sheet metal pieces 303 in the outer ring mixing chamber 20 and the corrugated fire cover pieces 304 arranged between the thin sheet metal pieces 303 can form an outer ring fire of the annular seam, thereby forming a three-ring fire, and when the user lifts the cookware, the movable member 3 and the switch member 7 in the control diversion chamber 32 can return to the initial state, such as Figure 3 shown.

[0042] Example 2

[0043] The structure is basically the same as that of Example 1, with the only difference being that: while avoiding the occurrence of the de-ignition phenomenon, the secondary air "snatching" between the inner and outer rings can also be avoided. Specifically, the connecting body 10 also includes a second plate body 1001 located under the first plate body, and the second plate body 1001 is connected to the first plate body through a spacer 1002 arranged at intervals along the circumferential direction, and a secondary air channel 1003 connected to the outside is formed between adjacent spacers 1002, and each secondary air channel 1003 is aligned with each shelf 101. The inner edge of the second plate 1001 abuts against the central gas channel 11. Correspondingly, the chamber 1004 between the adjacent diversion chambers 32 of the movable member 3 faces the secondary air channel 1003. The chamber 1004 includes a vertical wall 1004a parallel to the central gas channel 11 and a transverse wall 1004b extending toward the secondary air channel 1003. The transverse wall 1004b and the vertical wall 1004a together constitute a first separation space 1003c that separates the secondary air channel 1003 (the separation space is Fig. 9 and Fig.10 The vertical wall 1004a and the central gas channel 11 together form a second partition space 1003d that separates the secondary air channel 1003 (the partition space is in Fig. 9 and Fig.10The first separation space 1003c is used to supply secondary air to the annular component 30, while the second separation space 1003d is used to supply secondary air to the inner fire ring cover 2. The structure of the movable body 3 is designed to separate the diversion chamber 32 and the chamber 1004 connected to the secondary air channel 1003. When the pot, especially the pointed bottom pot, is placed on the central channel 11, the movable part 3 moves downward under pressure, and the gas can flow into the diversion chamber 32 to avoid the inner fire ring cover 2 being pressed and the fire-out caused by excessive pressure in the central channel 11. At the same time, the movable part 3 can also separate the secondary air channel 1003 due to the chamber 1004 during the process of being pressed down, forming a separation space for supplying secondary air to the inner fire ring cover 2 and the annular component 30. In this way, the inner fire ring cover 2 and the annular component 30 can avoid "snatching" of secondary air during the combustion process. Figures 9 to 12 shown.

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 (2) is arranged on the central gas channel (11) and forms an inner ring gas mixing chamber (21), and has a fire outlet (22) connected to the inner ring gas mixing chamber (21); Features: A movable member (3) is at least partially disposed in the central gas passage (11), comprising a shielding portion (31) for shielding the fire outlet portion (22) and a diversion chamber (32) connected to the shielding portion (31) and located on the periphery of the inner ring fire cover (2); the movable member (3) can be directly triggered when a cooker is placed on it, thereby changing the air intake area of ​​the fire outlet portion (22) and diverting the gas in the central gas passage (11) to the diversion chamber (32); The inner ring fire cover (2) comprises an inner ring wall (23) and an outer ring wall (24) which are arranged at intervals inside and outside, the inner ring wall (23) encloses a central cavity (231), the inner ring wall (23) and the outer ring wall (24) together enclose an outer peripheral cavity (241) for the movable part (3) to move, the inner ring wall (23) is connected to the outer ring wall (24) via connecting ribs (4) arranged at intervals along the circumferential direction, a first elastic member (5) is connected between the movable part (3) and each connecting rib (4) so ​​that the movable part (3) always has the function of returning to an initial state, and the fire outlet (22) is provided on the outer ring wall (24); The diversion chamber (32) comprises a communication port (321) communicating with the peripheral cavity (241), a peripheral wall (322) arranged opposite to the communication port (321), and a bottom wall (323) and a top wall (324) connecting the communication port (321) and the peripheral wall (322); the top wall (324) is provided with at least two fire outlet holes (3241); correspondingly, the wall portion of the central gas channel (11) is provided with an air outlet (111) staggered with the communication port (321) of the diversion chamber (32); the movable part (3) can move downward when triggered by the action of placing a cookware thereon, so that the communication port (321) is communicated with the air outlet (111); The center of the shielding portion (31) is provided with a rod (9) on which the cookware is placed, and the rod (9) enables the shielding portion (31) to maintain a preset distance from the cookware; A connecting body (10) is further provided on the wall of the central gas passage (11) below the gas outlet (111), the connecting body (10) being used to connect to an outer annular gas mixing chamber (20) located outside the flow dividing chamber (32), and the connecting body (10) also has a resting portion (101) for resting the flow dividing chamber (32); The connecting body (10) comprises a first plate body, wherein the center of the first plate body has a limiting opening (102) for limiting the central gas passage (11), and the peripheral edge of the limiting opening (102) is provided with annular protrusions (103) protruding from the surface of the plate body at intervals, wherein the first portion (104) of the first plate body between the annular protrusion (103) and the peripheral edge of the limiting opening (102) constitutes the shelf portion (101), and the outer edge of the first plate body extends upwards with A convex wall (105), an annular component (30) is placed on the convex wall (105) and the annular convex ring (103), a second portion (106) of the first plate between the annular convex ring (103) and the convex wall (105), the convex wall (105), the annular convex ring (103) and the annular component (30) together constitute the outer annular air mixing chamber (20), and the annular component (30) has a flame port (300) connected to the outer annular air mixing chamber (20) to eject the mixed gas.

2. The burner for a gas stove according to claim 1, characterized in that: The shielding portion (31) of the movable member (3) is connected to the diversion chamber (32) via a connecting member (6) having an L-shaped cross section, wherein the connecting member (6) comprises a vertical portion (61) that moves within the peripheral cavity (241) and a transverse portion (62) that connects the vertical portion (61) and the connecting port (321), wherein the transverse portion (62) passes through the connecting port (321) of the diversion chamber (32).

3. The burner for a gas stove according to claim 2, characterized in that: A switch member (7) capable of opening and closing the communication port (321) and a second elastic member (8) connected to the switch member (7) are provided on the transverse portion (62) of the movable member (3), wherein the second elastic member (8) enables the switch member (7) to always have a tendency to close the communication port (321).

4. The burner for a gas stove according to claim 3, characterized in that: The switch member (7) is plate-shaped, and the second elastic member (8) is a compression spring, one end of which is connected to the switch member (7) and the other end of which is connected to the inner side of the peripheral wall (322) of the diversion chamber (32).

5. The burner for a gas stove according to claim 1, characterized in that: The connecting body (10) further comprises a second plate body (1001) located below the first plate body, the second plate body (1001) is connected to the first plate body via a spacer (1002) arranged at intervals along the circumferential direction, a secondary air channel (1003) communicating with the outside is formed between adjacent spacers (1002), each secondary air channel (1003) is aligned with each of the shelf parts (101), the inner edge of the second plate body (1001) is against the central gas channel (11), correspondingly, the chamber (1004) of the movable part (3) between adjacent diversion chambers (32) faces the secondary air channel (1003), the chamber (1004) comprises a spacer (1004) which is aligned with the central gas channel (11), and the spacer (1004) is provided with a plurality of air passages (1003) and a plurality of air passages (1003) which are connected to the central gas channel (11). A vertical wall (1004a) parallel to the central gas channel (11) and a transverse wall (1004b) extending toward the secondary air channel (1003), the transverse wall (1004b) and the vertical wall (1004a) together constitute a first partition space (1003c) separating the secondary air channel (1003), and the vertical wall (1004a) and the central gas channel (11) together constitute a second partition space (1003d) separating the secondary air channel (1003), the first partition space (1003c) is used to replenish secondary air to the annular component (30), and the second partition space (1003d) is used to replenish secondary air to the inner ring fire cover (2).

6. The burner for a gas stove according to claim 5, characterized in that: The annular component (30) is composed of an upper ring body (301) and a lower ring body (302) arranged in an upper and lower manner, wherein the upper ring body (301) includes a first annular edge (3011) abutting against the convex ring, and correspondingly, the lower ring body (302) is "L"-shaped, including a horizontal portion (3021) abutting against the annular convex ring (103) and an inclined portion (3022) corresponding to the upper ring body (301), and a contact portion (1061) for abutting against the horizontal portion (3021) of the lower ring body (302) is provided in the second portion (106) of the first plate body, and the gap between the upper ring body (301) and the inclined portion (3022) constitutes the flame port (300), and at least two layers of thin sheet metal sheets (303) and a corrugated fire cover sheet (304) provided between the thin sheet metal sheets (303) are provided in the flame port (300).

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