A burner for a gas stove

Abstract

The present invention relates to a burner for a gas stove, comprising a base, the base having a concave cavity with an opening facing upward, an injector arranged at the central position of the concave cavity, and a plate body suspended above the base, the outer periphery of the plate body covering a first connector of the concave cavity, characterized in that: a vertically arranged ejector tube extending downward is provided at the central position of the plate body, the upper end opening of the ejector tube is an air outlet end, the lower end opening of the ejector tube is an air inlet end and extends into the concave cavity of the base and is opposite to the injector, the gap between the plate body and the base and the part of the base concave cavity outside the ejector tube constitute a primary air channel, and compared with the prior art, the present invention has the advantage that: once overflow enters the concave cavity through the primary air channel, the tube wall of the ejector tube can also serve as a protective wall to block the overflow from entering the injector, thereby avoiding blockage of the injector.

Description

Technical Field

[0001] The invention relates to a burner, in particular to a burner used for a gas stove. Background Art

[0002] At present, many gas stoves have begun to use completely upper air intake burners. Since the primary and secondary air required by the completely upper air intake burners during combustion come from the upper part of the stove panel, the chassis of the gas stove can be fully sealed. Compared with the traditional burners with lower air intake structures, the completely upper air intake burners are not only safer to use, but also can well solve the problem of stove flameout caused by opening and closing cabinet doors. However, the traditional completely upper air intake burners are all replenished through the gap between the mixing chamber and the base when replenishing primary air. The problem caused by this is that there is a gap between the mixing chamber and the base, which on the one hand easily makes the appearance of the burner not beautiful enough, and on the other hand, the overflow will flow into the base through the gap, which is not only not conducive to the cleaning of the burner, but also if the overflow is not cleared for a long time, it will affect the normal use of the burner. To this end, as disclosed in the Chinese utility model patent with patent number ZL201020579358.1 (authorization announcement number CN 2018586642 U), "A complete top air intake burner", the complete top air intake burner includes a burner head seat, a fire cover seat, a central fire cover and an outer ring fire cover, wherein the fire cover seat includes a fire cover upper seat, a fire cover lower seat and a central air supply hole, a primary air intake gap is provided between the fire cover lower seat and the burner head seat, and the primary air intake gap is located above the panel. For another example, the applicant provides a top-inlet burner for a gas stove, in which both primary air and secondary air are replenished through air holes on an air mixing chamber. For details, see Chinese invention patent No. ZL201410209837.7 (publication No. CN103994436B). Since the concave cavity of the base and the annular cavity of the air mixing chamber in the top-inlet burner are isolated from each other, the primary air holes opened on the side of the air mixing chamber are connected to the concave cavity to form a primary air channel. Therefore, there is no need to set a gap between the air mixing chamber and the base to replenish primary air. However, it is still inevitable that overflow will enter the primary air holes and the secondary air holes during use, thereby causing clogging of the nozzle.

[0003] In addition, the heat generated by the gas combustion is lost along the path of fire cover-mixing chamber-base. Therefore, if you want to improve the thermal efficiency, an effective way is to reduce the heat conduction loss of the high-temperature fire cover downward or recycle this part of the heat loss. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a burner for a gas stove which can avoid the nozzle being blocked by overflow in view of the above-mentioned prior art status.

[0005] The second technical problem to be solved by the present invention is to provide a burner for a gas stove that can effectively preheat the primary air temperature and reduce heat loss in response to the above-mentioned existing technical status.

[0006] The third technical problem to be solved by the present invention is to provide a burner for a gas stove that can effectively improve the uniformity of mixing primary air and gas in response to the above-mentioned prior art status.

[0007] The present invention solves the above-mentioned first technical problem. The technical solution adopted by the present invention is: the burner for the gas stove comprises:

[0008] The base has a concave cavity with an opening facing upward, and an ejector is arranged at the center of the concave cavity;

[0009] The first connector includes a plate suspended above the base, wherein the outer periphery of the plate covers the concave cavity; the ...

[0010] The central position of the plate body has a vertically arranged ejector tube extending downward, the upper end opening of the ejector tube is an air outlet end, the lower end opening of the ejector tube is an air inlet end, and extends into the base cavity opposite to the ejector, and the gap between the plate body and the base and the part of the base cavity outside the ejector tube constitute a primary air channel.

[0011] To further solve the first technical problem, in order to prevent overflow from passing through the fire outlet of the fire cover - through the mixing chamber - into the air outlet end of the ejector tube - and finally flowing into the injector, preferably, it also includes a second connector arranged on the first connector, and a fire cover is also arranged on the second connector, and a mixing chamber for mixing primary air and gas is formed between the fire cover and the second connector, and the mixing chamber is fluidically connected with the air outlet end of the ejector tube, and the second connector also has a shielding portion suspended above the air outlet end of the first ejector tube and at least partially shielding the air outlet end.

[0012] Further, the fire cover includes an outer ring portion, the air mixing chamber includes a first air mixing chamber corresponding to the outer ring portion, the second connector includes an inner ring wall and an outer ring wall concentrically spaced and a bottom wall connecting the inner ring wall and the outer ring wall, the inner ring wall, the outer ring wall, the bottom wall and the outer ring fire cover together enclose the first air mixing chamber, the inner periphery of the inner ring wall extends toward the central position above the air outlet end of the ejector tube to form an inner cover plate, the inner cover plate constitutes the shielding portion, and the gap between the inner cover plate and the upper surface of the first connector constitutes the entrance of the first air mixing chamber. The above-mentioned second connector is arranged in an integral manner, and can also be arranged in a split manner for ease of processing, such as the inner ring wall and the inner cover plate are arranged in one piece, and the outer ring wall and the bottom wall are arranged in one piece.

[0013] In order to enable the burner to satisfy the user's control over the peripheral fire and the center fire, the fire cover also includes an inner ring portion located inside the outer ring portion, the air mixing chamber includes a second air mixing chamber corresponding to the inner ring portion, the inner cover plate has an inner annular wall supporting the second air mixing chamber, the inner ring portion and the inner annular wall form the second air mixing chamber, and a through hole connecting the second air mixing chamber and the air outlet end of the ejector pipe is opened in the center of the inner cover plate.

[0014] To further solve the first technical problem, in order to prevent the overflow liquid from passing through the ignition hole of the inner ring part - through the second air mixing chamber - into the air outlet end of the ejector tube - and finally flowing into the injector, preferably, the hole wall of the through hole protrudes toward the second air mixing chamber, and the hole wall and the inner annular wall constitute a liquid storage area for storing the overflow liquid.

[0015] Furthermore, the second connector also includes at least two transmission channels connecting the inner ring wall and the inner annular wall, and the transmission channels are used to transmit the mixed primary air and fuel gas from the outlet end of the ejector pipe to the first mixing chamber.

[0016] In order to meet the requirement that when the burner is an upper air inlet burner, both the secondary air and the primary air are supplemented from above the panel, the outer ring wall is circumferentially spaced apart with a secondary air inlet channel independent of the first mixing chamber, the transmission channel is spaced apart from the secondary air inlet channel, and the gap between adjacent transmission channels constitutes the air outlet of the secondary air inlet channel.

[0017] Furthermore, the inner ring portion includes an inner fire cover that forms the second air mixing chamber with the inner annular wall, and the inner fire cover includes an annular circumferential wall and a cover body covering the annular circumferential wall, and the annular circumferential wall is provided with inner fire holes connected to the second air mixing chamber at intervals along the circumferential direction.

[0018] In order to stabilize the flame of the inner fire cover, a concave-convex structure is extended radially inward on the top of the annular peripheral wall, and the cover body and the concave-convex structure form a flame stabilizing channel for stabilizing the flame of the inner fire hole.

[0019] To further solve the second technical problem, preferably, the first connector is provided with a preheating element on the periphery of the ejector tube for preheating the primary air in the primary air channel.

[0020] In order to evenly distribute the primary air flowing into the concave cavity through the primary air channel, the preheating element includes at least two spiral arm preheating fins arranged around the ejector tube, each preheating fin being arranged at intervals along the circumference of the plate body and being spirally radial as a whole.

[0021] Furthermore, each of the rotary arm type preheating fins includes an inner end adjacent to the ejector tube and an outer end away from the ejector tube, the inner end has a convex rib extending downward along the axial direction of the ejector tube, and the outer periphery of the convex rib abuts against the inner circumferential wall of the base. The inner end of the rotary arm type preheating fin is directly connected to the ejector tube, and the outer end of the rotary arm type preheating fin abuts against the inner circumferential wall of the base, thereby fully utilizing the combustion heat generated by the base and the ejector tube during the combustion process of the burner to preheat the primary air of the primary air channel.

[0022] In order to increase the exchange path and exchange time between the primary air and the preheating element, each of the convex ribs is at an angle to or parallel to the central axis of the ejector tube.

[0023] Furthermore, each of the convex ribs forms an angle with the central axis of the ejector tube, and the convex rib has a curved surface.

[0024] Preferably, the outer end of each of the spiral arm-type preheating fins extends out of the concave cavity and to the outer peripheral edge of the plate body, and the gaps between adjacent spiral arm-type preheating fins form an air inlet connected to the primary air channel, so that the preheating fins can also evenly separate the air inlets of the primary air channel at intervals along the circumferential direction.

[0025] In order to prevent the overflow liquid flowing into the concave cavity through the primary air channel from affecting the ejector, the base is provided with an annular baffle wall at the periphery of the ejector, and the upper end outlet of the annular baffle wall at least partially extends into the air inlet end of the ejector tube.

[0026] In order to realize that the annular baffle wall also has the function of better guiding the primary air into the air inlet end of the ejector tube, the top edge of the annular baffle wall corresponding to the air inlet end is gradually inclined upward from the outside to the inside.

[0027] In order to realize the function of the annular baffle wall in addition to blocking the overflow, preferably, the annular baffle wall surrounds the air cavity of the ejector, and the air cavity is connected to an external air supply unit. The air cavity can be connected to an external air supply unit such as a blower to adjust the amount of primary air as needed.

[0028] Compared with the prior art, the advantage of the present invention lies in that a first connector is arranged in the concave cavity of the base, the first connector includes a plate body and an ejector tube, wherein the plate body is suspended above the base, the ejector tube extends into the concave cavity of the base and is opposite to the ejector, and then the gap between the plate body and the base and the part outside the ejector tube in the concave cavity of the base constitute a primary air channel. Once the overflow enters the concave cavity through the primary air channel, the tube wall of the ejector tube can also serve as a protective wall to prevent the overflow from entering the ejector, thereby avoiding clogging of the ejector. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1This is a schematic diagram of the structure of the burner in Example 1 of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure in which the burner is placed on a panel in Example 1 of the present invention;

[0031] Figure 3 for Figure 2 A cross-sectional view at an angle;

[0032] Figure 4 for Figure 2 A cross-sectional view from another angle;

[0033] Figure 5 for Figure 2 A cross-sectional view from another angle;

[0034] Figure 6 is a schematic structural diagram of the first connector in Example 1 of the present invention;

[0035] Figure 7 for Figure 6 A cross-sectional view of

[0036] Figure 8 for Figure 2 Schematic diagram of the decomposition structure;

[0037] Fig. 9 This is a schematic structural diagram of a second connector at an angle in Example 1 of the present invention;

[0038] Fig.10 This is a schematic structural diagram of the second connector from another angle in Embodiment 1 of the present invention;

[0039] Fig.11 This is a schematic diagram of the structure of a burner in Example 2 of the present invention;

[0040] Fig.12 for Fig.11 sectional view of . DETAILED DESCRIPTION

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

[0042] Example 1

[0043] like Figures 1 to 10As shown, it is the embodiment 1 of the present invention. The burner for the gas stove in this embodiment comprises a base 1, the base 1 has a concave cavity 11 with an opening facing upward, an ejector 2 is arranged at the central position of the concave cavity 11, and a first connecting body 3, the first connecting body 3 comprises a plate body 30 suspended on the base 1, the outer periphery of the plate body 30 covers the concave cavity, the central position of the plate body 30 has an ejector pipe 31 extending downward and arranged vertically, the upper end opening of the ejector pipe 31 is an air outlet end 311, the lower end opening of the ejector pipe is an air inlet end 312, and extends into the concave cavity 11 of the base to face the ejector 2, and the gap between the plate body 30 and the base and the part of the concave cavity 11 of the base 1 outside the ejector pipe 31 constitute a primary air channel 8. A first connector 3 is arranged in the concave cavity 11 of the base 1, and the first connector 3 includes a plate body 30 and an ejector tube 31, wherein the plate body 30 is suspended above the base 1, and the ejector tube 31 extends into the concave cavity 11 of the base 1 and is opposite to the injector 2, so that the gap between the plate body 30 and the base 1 and the part outside the ejector tube 31 in the concave cavity 11 of the base 1 constitute a primary air channel 8. Once the overflow enters the concave cavity 44 through the primary air channel 8, the tube wall of the ejector tube 31 can also serve as a protective wall to prevent the overflow from entering the injector 2, thereby avoiding blockage of the injector 2.

[0044] In addition, it also includes a second connecting body 4 arranged on the first connecting body 3, and a fire cover is also arranged on the second connecting body 4. A mixing chamber for mixing primary air and fuel gas is formed between the fire cover and the second connecting body 4. The mixing chamber is fluidly connected with the gas outlet end 311 of the ejector tube 31. The second connecting body 4 also has a shielding portion suspended above the gas outlet end 311 of the first ejector tube 31 and at least partially shielding the gas outlet end 311. The fire cover includes an outer ring portion 5, the gas mixing chamber includes a first gas mixing chamber 51 corresponding to the outer ring portion 5, the second connector 4 includes an inner ring wall 41 and an outer ring wall 42 arranged concentrically and spaced apart, and a bottom wall 43 connecting the inner ring wall 41 and the outer ring wall 42, the inner ring wall 41, the outer ring wall 42, the bottom wall 43 and the outer ring fire cover 52 are collectively arranged to form the first gas mixing chamber 51, the inner periphery of the inner ring wall 41 extends toward the central position above the gas outlet end 311 of the ejector tube 31 to form an inner cover plate 411, the inner cover plate 411 constitutes a shielding portion, and the gap between the inner cover plate 411 and the upper surface of the first connector 3 constitutes the inlet 511 of the first gas mixing chamber 51. The second connector 4 is arranged in an integral manner, and can also be arranged in a split manner for the convenience of processing, such as the inner ring wall 41 and the inner cover plate 411 are arranged in an integral manner, and the outer ring wall 42 and the bottom wall 43 are arranged in an integral manner.

[0045] In order to realize that the burner can satisfy the user's control of the peripheral fire and the center fire, the fire cover also includes an inner ring portion 6 located inside the outer ring portion 5, the gas mixing chamber includes a second gas mixing chamber 61 corresponding to the inner ring portion 6, the inner cover plate 411 has an inner annular wall 4111 supporting the second gas mixing chamber 61, the inner ring portion 6 and the inner annular wall 4111 form the second gas mixing chamber 61, and the center of the inner cover plate 411 is provided with a through hole 4112 connecting the second gas mixing chamber 61 and the gas outlet end 311 of the ejector tube 31. The inner ring portion 6 includes an inner fire cover 62 forming the second gas mixing chamber 61 with the inner annular wall 4111, the inner fire cover 62 includes an annular peripheral wall 621 and a cover body 622 covering the annular peripheral wall 621, and the annular peripheral wall 621 is provided with inner fire holes 6211 connecting the second gas mixing chamber 61 spaced apart along the circumferential direction. In order to stabilize the flame of the inner fire cover, the top of the annular peripheral wall 621 extends radially inward with a concave-convex structure 6212, and the cover body 622 and the concave-convex structure 6212 form a flame stabilizing channel of the flame stabilizing inner fire hole 6211. In order to prevent the overflow from passing through the inner fire hole 6211 of the inner ring part 6-through the second gas mixing chamber-61 into the gas outlet end 311 of the ejector tube 31-and finally flowing into the ejector 2, the hole wall of the through hole 4112 protrudes toward the second gas mixing chamber 61, and the hole wall and the inner annular wall 4111 form a liquid storage area 4113 for storing the overflow. In order to better transmit the mixed primary air and gas from the gas outlet end 311 of the ejector tube to the first gas mixing chamber 51, the second connector 4 also includes at least two transmission channels 44 connecting the inner ring wall 41 and the inner annular wall 4111, and the transmission channel 44 is used to transmit the mixed primary air and gas from the gas outlet end 311 of the ejector tube 31 to the first gas mixing chamber 51. In order to meet the requirement that when the burner is an upper air inlet burner, both the secondary air and the primary air are supplemented from above the panel 9, the outer ring wall 42 is circumferentially spaced apart with secondary air inlet channels 7 independent of the first mixing chamber 51, the transmission channel 44 is spaced apart from the secondary air inlet channel 7, and the gap between adjacent transmission channels 44 constitutes an air outlet 71 of the secondary air inlet channel 7.

[0046] In order to effectively preheat the primary air temperature and reduce heat loss, the first connector 3 is provided with a preheating element for preheating the primary air in the primary air channel 8 on the periphery of the ejector tube 31. The preheating element includes at least two spiral arm preheating fins 32 arranged around the ejector tube 31. In order to evenly distribute the primary air flowing into the concave cavity 11 through the primary air channel 8, each preheating fin is arranged at intervals along the circumference of the plate body 30 and is spirally radial as a whole. In addition, each of the spiral arm type preheating fins 32 includes an inner end 321 adjacent to the ejector tube 31 and an outer end 322 away from the ejector tube 31, and the inner end 321 extends downward along the axis direction of the ejector tube 31 with a convex rib 3211, and the outer periphery of the convex rib 3211 abuts against the inner peripheral wall of the base 1, and the inner end 321 of the spiral arm type preheating fin is directly connected to the ejector tube 31, and the outer end 322 of the spiral arm type preheating fin abuts against the inner peripheral wall of the base 1, thereby fully utilizing the combustion heat generated by the base 1 and the ejector tube 31 during the combustion process of the burner to preheat the primary air of the primary air channel 8. In order to increase the exchange path and exchange time between the primary air and the preheating element, each convex rib 3211 is at an angle or parallel to the central axis of the ejector tube 31. Preferably, each convex rib 3211 is at an angle to the central axis of the ejector tube 31, and the convex rib 3211 has an arc surface. In addition, the outer end 322 of each spiral arm type preheating plate 32 extends out of the concave cavity 11 and extends to the outer peripheral edge of the plate body. The gap between adjacent spiral arm type preheating plates 32 constitutes an air inlet 81 connected to the primary air channel 8, so that the preheating plate 32 also has the function of evenly separating the air inlet 81 of the primary air channel 8 along the circumferential direction.

[0047] Finally, in order to prevent the overflow liquid flowing into the concave cavity 11 through the primary air channel 8 from affecting the ejector 2, the base 1 is provided with an annular baffle 12 on the periphery of the ejector 2. In order to realize that the annular baffle 12 also has the function of better guiding the primary air into the air inlet end of the ejector tube 31, the upper end outlet 121 of the annular baffle 12 at least partially extends into the air inlet end 312 of the ejector tube 31, and the top edge 122 of the annular baffle 12 corresponding to the air inlet end 312 gradually tilts upward from the outside to the inside. In order to realize that the annular baffle 12 has the function of blocking the overflow liquid, preferably, the annular baffle 12 surrounds the air cavity 120 of the ejector 2, and the air cavity 120 is connected to the external air supply part 14. The air cavity 120 can be connected to the external air supply part 14 such as a blower to adjust the amount of primary air as needed.

[0048] Example 2

[0049] The structure is basically the same as that of Example 1, the only difference being that the fire cover has only the outer ring portion 5, the inner cover plate 411 does not have the through hole 4112, and the inner cover plate 411 serves as a shielding portion in the ejection tube 31 that shields the gas outlet end 311. Fig.11 and 12 shown.

Claims

1. A burner for a gas stove, comprising: The base (1) has a cavity (11) with an opening facing upward, and an ejector (2) is arranged at the center of the cavity (11); The first connecting body (3) comprises a plate body (30) suspended above the base (1), the outer periphery of the plate body (30) covering the concave cavity (11), and is characterized in that: The central position of the plate body (30) is provided with a vertically arranged ejector tube (31) extending downward, the upper end opening of the ejector tube (31) being an air outlet end (311), the lower end opening of the ejector tube (31) being an air inlet end (312), and extending into the concave cavity (11) of the base (1) opposite to the ejector (2), the gap between the plate body (30) and the base (1) and the portion of the ejector tube (31) in the concave cavity (11) of the base (1) forming a primary air passage (8); The invention also comprises a second connecting body (4) arranged on the first connecting body (3), a fire cover is also arranged on the second connecting body (4), an air mixing chamber for mixing primary air and fuel gas is formed between the fire cover and the second connecting body (4), the air mixing chamber is fluidly connected to the air outlet end (311) of the ejector tube (31), and the second connecting body (4) also comprises a shielding portion suspended above the air outlet end (311) of the ejector tube (31) and at least partially shielding the air outlet end (311); the fire cover comprises an outer ring portion (5), the air mixing chamber comprises a first air mixing chamber (51) corresponding to the outer ring portion (5), and the second connecting body (4) comprises a concentric space An inner ring wall surface (41) and an outer ring wall surface (42) are arranged at intervals, and a bottom wall (43) connecting the inner ring wall surface (41) and the outer ring wall surface (42); the inner ring wall surface (41), the outer ring wall surface (42), the bottom wall (43) and the outer ring fire cover (52) together enclose the first gas mixing chamber (51); the inner peripheral edge of the inner ring wall surface (41) extends from the gas outlet end (311) of the ejector tube (31) to the central position to form an inner cover plate (411); the inner cover plate (411) constitutes the shielding portion, and the gap between the inner cover plate (411) and the upper surface of the first connector (3) constitutes the entrance (511) of the first gas mixing chamber (51); The fire cover further comprises an inner ring portion (6) located inside the outer ring portion (5); the gas mixing chamber comprises a second gas mixing chamber (61) corresponding to the inner ring portion (6); the inner cover plate (411) comprises an inner ring wall (4111) supporting the second gas mixing chamber (61); the inner ring portion (6) and the inner ring wall (4111) form the second gas mixing chamber (61); a through hole (4112) is provided at the center of the inner cover plate (411) for connecting the second gas mixing chamber (61) with the gas outlet end (311) of the ejector tube (31); The hole wall of the through hole (4112) is Said The second gas mixing chamber (61) is protruding, and the hole wall and the inner annular wall (4111) form a liquid storage area (4113) for storing overflow liquid; The second connector (4) also includes at least two connectors Said The inner ring wall surface (41) and the transmission channel (44) of the inner annular wall (4111) are used to transmit the mixed primary air and fuel gas from the gas outlet end (311) of the ejector pipe to the first gas mixing chamber (51).

2. The burner for a gas stove according to claim 1, characterized in that: The outer ring wall surface (42) is provided with secondary air inlet channels (7) independent of the first air mixing chamber (51) at intervals along the circumferential direction, the transmission channel (44) is arranged at intervals from the secondary air inlet channel (7), and the gap between adjacent transmission channels (44) constitutes an air outlet (71) of the secondary air inlet channel (7).

3. The burner for a gas stove according to claim 1 or 2, characterized in that: The inner ring portion (6) includes an inner fire cover (62) which forms the second air mixing chamber (61) with the inner ring wall (4111), and the inner fire cover (62) includes an annular circumferential wall (621) and a cover body (622) covering the annular circumferential wall (621), and the annular circumferential wall (621) is provided with inner fire holes (6211) connected to the second air mixing chamber (61) at intervals along the circumferential direction.

4. The burner for a gas stove according to claim 3, characterized in that: A concave-convex structure (6212) is radially extended inwardly from the top of the annular peripheral wall (621), and the cover body (622) and the concave-convex structure (6212) form a flame stabilizing channel for stabilizing the flame of the inner fire hole (6211).

5. The burner for a gas stove according to any one of claims 1 to 4, characterized in that: The first connecting body (3) is provided with a preheating element on the outer periphery of the ejector tube (31) for preheating the primary air in the primary air channel (8).

6. The burner for a gas stove according to claim 5, characterized in that: The preheating element comprises at least two spiral arm type preheating fins (32) arranged around the ejector tube (31), and each spiral arm type preheating fin (32) is arranged at intervals along the circumference of the plate body (30) and is in a spiral radial shape as a whole.

7. The burner for a gas stove according to claim 6, characterized in that: Each of the rotary arm type preheating plates (32) comprises an inner end (321) adjacent to the ejector tube (31) and an outer end (322) away from the ejector tube (31); the inner end (321) is provided with a convex rib (3211) extending downwardly along the axial direction of the ejector tube (31); the outer peripheral edge of the convex rib (3211) abuts against the inner peripheral wall of the base (1).

8. The burner for a gas stove according to claim 7, characterized in that: Each of the convex ribs (3211) is at an angle to or parallel to the central axis of the ejector tube (31).

9. The burner for a gas stove according to claim 8, characterized in that: Each of the convex ribs (3211) forms an included angle with the central axis of the ejector tube (31), and the convex rib (3211) has a curved surface.

10. The burner for a gas stove according to claim 9, characterized in that: The outer end (322) of each of the rotary arm-type preheating fins (32) protrudes out of the concave cavity (11) and extends to the outer peripheral edge of the plate body (30), and the gap between adjacent rotary arm-type preheating fins (32) constitutes an air inlet (81) connected to the primary air channel (8).

11. The burner for a gas stove according to any one of claims 6 to 10, characterized in that: The base (1) is provided with an annular baffle wall (12) on the periphery of the ejector (2), and an upper end outlet (121) of the annular baffle wall (12) at least partially extends into the air inlet end (312) of the ejector tube (31).

12. The burner for a gas stove according to claim 11, characterized in that: The top edge (122) of the annular baffle wall (12) corresponding to the air inlet end (312) gradually slopes upward from the outside to the inside.

13. The burner for a gas stove according to claim 12, characterized in that: The annular baffle wall (12) surrounds an air chamber (120) of the injector (2), and the air chamber (120) is connected to an external air supply portion (14).

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