A burner for a gas stove

Abstract

The present invention relates to a burner for a gas stove, comprising a first air mixing chamber, the first air mixing chamber comprising an annular wall and a first fire cover covering the annular wall, characterized in that: the peripheral wall of the first fire cover is provided with at least two fire outlets connected to the first air mixing chamber at intervals along the circumferential direction, the fire outlets comprising a fire outlet portion at least exposed to the outside of the peripheral wall, an air inlet portion located on the inner side of the peripheral wall, and an elastic member connected to the air inlet portion and the inner side of the peripheral wall, the elastic member can drive the fire outlet body to move and / or rotate according to the pressure of the fuel gas injected into the air mixing chamber, thereby changing the air outlet area of ​​the fire outlet portion. Compared with the prior art, the advantage of the present invention is that: by providing a fire outlet body in the fire cover that can move and / or rotate relative to the fire outlet body, the air outlet area of ​​the fire outlet portion of the fire outlet body is adjusted, thereby adjusting the speed of the mixed gas injected into the first air mixing chamber to achieve a harmonious state without backfire.

Description

Technical Field

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

[0002] Generally, according to the method of burning gas fuel in a gas boiler, such as a premix burner, gas and air are premixed in a mixing ratio most suitable for combustion, and then supplied to the surface of the fire hole for combustion. However, when the load required by the combustion device is small, if the gas is supplied at a low pressure, since the injection speed into the interior of the combustion chamber is lower than the combustion speed of the mixed gas in the combustion chamber, a flame is generated on the inner surface of the fire cover plate facing the interior of the combustion chamber. As a result, there is a problem of abnormal combustion, that is, flashback occurs. That is, if the speed of the mixed gas injected through the fire hole is less than a predetermined speed, flashback will occur to generate a flame inside the fire hole. However, it is difficult to meet the diversity of user needs through flow control, such as the Chinese utility model patent "A New Gas Stove High Fire Cover" with patent number ZL201620432553.9 (authorization announcement number CN205783145U), which includes a block body, and the middle part of the block body includes two hinged parts, the two hinged parts are block one and block two, and block one and block two each include a fire hole, and block one and block two are circular structures when they do not rotate relative to each other. The direction of the fire hole is adjusted by rotating block one relative to block two, and its main function is to facilitate concentrated firepower for cooking. It can be seen that its adjustment method is relatively simple and the firepower adjustment is also relatively limited.

[0003] To this end, the applicant provides a Chinese utility model patent "Burner with Adjustable Fire Hole" with patent number ZL201720766832.3 (publication number CN206958909U), which discloses a burner with adjustable fire hole, including an ejection component, a gas mixing seat and a fire cover, characterized in that the fire cover is provided with a circle of mounting holes, a spherical movable body is provided on the gas mixing seat corresponding to each mounting hole, the movable body is limited in the aforementioned mounting hole and has a radial hollow fire outlet channel, the air inlet end of the fire outlet channel is communicated with the gas mixing chamber of the gas mixing seat, and the air outlet end forms the fire hole, and a stepper motor is provided on the gas mixing seat corresponding to each movable body, the output shaft of the stepper motor is connected to the outer wall of the movable body and can drive the movable body to rotate inside and outside; although it can meet the respective cooking requirements, in order to avoid the phenomenon of flame flashback inside the fire hole when the speed of the mixed gas ejected through the fire hole is less than a predetermined speed, further improvement is 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 prevent flashback when the mixed gas has a low output, in view of the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the present invention is to provide a burner for a gas stove that can adaptively adjust the amount of secondary air supplement according to the combustion conditions in view of the above-mentioned existing technical status.

[0006] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the burner for the gas stove includes a first air mixing chamber, the first air mixing chamber includes an annular wall and a first fire cover covering the annular wall, and is characterized in that: the peripheral wall of the first fire cover is provided with at least two fire bodies connected with the first air mixing chamber at intervals along the circumferential direction, the fire body includes at least a fire portion exposed outside the peripheral wall, an air inlet portion located on the inner side of the peripheral wall, and an elastic member connected to the air inlet portion and the inner side of the peripheral wall, the elastic member can drive the movement and / or rotation of the fire body according to the pressure of the mixed gas sprayed into the first air mixing chamber, thereby changing the air outlet area of ​​the fire portion.

[0007] In order to realize the connection of the elastic member and change the air outlet area of ​​the fire outlet portion, it is preferably structurally realized that the fire outlet body includes a cylinder with an open inner side and a closed outer side, the first cylinder wall portion of the cylinder corresponding to the fire outlet portion has a main fire outlet adjacent to its outer side, and the second cylinder wall portion of the cylinder corresponding to the air inlet portion has a convex wall extending outwardly adjacent to its inner side, one end of the elastic member is connected to the convex wall and the other end of the elastic member is connected to the inner side of the peripheral wall, so that the elastic member can drive the movement and / or rotation of the fire outlet body according to the pressure of the mixed gas sprayed into the first mixing chamber.

[0008] In order to realize that the fire outlet of the fire outlet body has more fire outlet forms, preferably, the first cylinder wall portion of the cylinder corresponding to the fire outlet portion is respectively provided with at least two first auxiliary fire outlet holes on both sides of the main fire outlet, and the center line of each first auxiliary fire outlet hole is at an angle with the axis of the cylinder. The first auxiliary fire outlet hole is at an angle with the axis of the cylinder so that a rotating fire can be formed, and the secondary air can be better supplemented when the fire outlet body rotates, and on the other hand, the fire can be better transmitted between each other.

[0009] In order to better transfer fire between adjacent fire outlet bodies, preferably, at least two second auxiliary fire outlet holes are opened at the outer closed end of the cylinder, and the main fire outlet is connected to one of the second auxiliary fire outlet holes through a fire transfer channel.

[0010] In order to prevent the fire outlet body from being separated from the first fire cover during movement, preferably, the first cylinder wall portion of the cylinder corresponding to the fire outlet portion has an anti-separation member to prevent the fire outlet body from being separated from the first fire cover.

[0011] In order to better introduce the mixed gas into the fire cover and maintain the mixed gas speed in the first mixed gas chamber at a speed higher than the combustion speed, preferably, the annular wall of the first mixed gas chamber has a partition ring wall extending inwards adjacent to the upper part thereof, the center of the partition ring wall has an air inlet for the mixed gas to enter the first fire cover, and the periphery of the air inlet has a convex ring extending toward the first fire cover. Since the caliber of the convex ring is smaller than the upper part of the first mixed gas chamber, the mixed gas can be maintained at a speed higher than the combustion speed when entering the fire cover through the convex ring, and the combustion flashback inside the fire outlet body can be prevented by moving and / or rotating the fire outlet body.

[0012] To solve the second technical problem, preferably, the outer periphery of the first air mixing chamber is connected to the second air mixing chamber through a connector, the connector includes a connecting plate extending radially outward along the middle of the annular wall of the first air mixing chamber, the second air mixing chamber includes a bottom wall directly using the connecting plate, an inner annular wall and an outer annular wall spaced apart from the first air mixing chamber, and a second fire cover covering the inner annular wall and the outer annular wall, and the bottom wall of the second air mixing chamber is provided with at least two vertical air supply channels spaced apart along the circumference of the inner annular wall. The second air mixing chamber is provided around the outer periphery of the first air mixing chamber to form a double ring fire, and the vertical air supply channels provided on the bottom wall of the second air mixing chamber can respectively supply secondary air to the first air mixing chamber and the second air mixing chamber to promote full combustion of the two.

[0013] In order to avoid "competition" for secondary air between the first mixing chamber and the second mixing chamber, preferably, a partition is provided on the annular wall of the first mixing chamber, and the partition can divide the vertical air supply channel into two relatively independent spaces, which are respectively connected to the fire outlet area of ​​the first mixing chamber and the outer wall area of ​​the second mixing chamber.

[0014] In order to better transmit the secondary air of the vertical air supplement channel to the outer wall area of ​​the second air mixing chamber, preferably, the bottom wall of the second air mixing chamber is provided with a transmission channel along the radial direction for the vertical supplement channel to connect to the outer wall area of ​​the second air mixing chamber, and correspondingly, the bottom wall of the second air mixing chamber is also provided with a secondary air supplement channel along the radial direction spaced apart from the transmission channel. When supplementing air, the secondary air in the stove is divided into two paths through the vertical supplement channel, one of which is transmitted to the outer wall area of ​​the second air mixing chamber through the transmission channel.

[0015] In order to realize that the secondary air in the stove can be replenished to the first air mixing chamber when it goes up through the vertical supplementary channel, preferably, the partition includes a partition extending outward along the annular wall and in an annular shape, and the outer end of the partition has a folded edge that is folded upward, and there is a first gap between the folded edge and the annular wall of the first air mixing chamber. When replenishing air, the secondary air goes up through the vertical supplementary channel and is divided into two paths, one of which is transmitted to the fire outlet area of ​​the first air mixing chamber through the first gap; in addition, the folded edge of the partition can also prevent the overflow of liquid that enters the partition along the annular wall of the first air mixing chamber from overflowing, and has a certain function of containing the overflow.

[0016] In order to prevent overflow during cooking from entering the vertical supplementary channel, preferably, the inner annular wall of the second air mixing chamber is provided with a shielding plate above the vertical air supplementary channel, and a second interval is provided between the inner side end of the shielding plate and the annular wall of the first air mixing chamber, and the vertical air supplementary channel supplements air to the fire outlet area of ​​the first air mixing chamber through the second interval. When supplementing air, the secondary air in the stove is divided into two paths through the vertical supplementary channel, one of which is transmitted to the fire outlet area of ​​the first air mixing chamber through the first interval. In order to avoid the air supplement of the first air mixing chamber being blocked due to the setting of the shielding plate, the formation of the second interval can realize that the secondary air continues to flow from the first interval through the second interval to the periphery of the first air mixing chamber.

[0017] In order to better gather the combustion heat in the second mixing chamber during the cooking process to improve the combustion efficiency, preferably, the connector also includes a connecting pin that continues to extend outward along the transmission channel, and the connecting pin is used to connect to the energy collecting cover located outside the second mixing chamber.

[0018] In order to enable the energy gathering hood to preheat the secondary air, preferably, the energy gathering hood includes an annular hood body, and the hood body is a double-layer structure composed of an upper hood and a lower hood, and a cavity is formed between the upper hood and the lower hood, and the cavity is connected to the outer wall area of ​​the second mixing chamber and each of the transmission channels and the secondary air supplement channels, and the upper hood is provided with at least two air inlet holes spaced circumferentially for external air to enter the cavity. The preheating path of the secondary air is divided into three routes: the first route is that the external secondary air directly enters the cavity of the cover body through the air inlet for preheating, and is supplemented to the fire outlet area of ​​the first mixing chamber through the secondary air supplement channel; the second route is that the secondary air in the stove goes up through the vertical supplement channel through the first interval and the second interval to supplement to the fire outlet area of ​​the first mixing chamber; the third route is that the secondary air in the stove goes up through the vertical supplement channel through the transmission channel to the outer wall area of ​​the second mixing chamber; the secondary air of the second and third routes can circulate with each other in the secondary air supplement channel, and when the combustion load of the second mixing chamber increases, more air can be drawn from the secondary air supplement channel; and when the combustion load of the first mixing chamber increases, more air can be drawn from the secondary air supplement channel.

[0019] In order to effectively draw the secondary air upward from bottom to top to the vertical supplementary channel, preferably, each of the air inlets has an angle with the central axis of the cover body. Since each of the air inlets has an angle with the central axis of the cover body, a rotating suction force for the secondary air can be formed.

[0020] Compared with the prior art, the advantage of the present invention is that a fire outlet body that can move and / or rotate relative to the fire cover is provided to adjust the gas outlet area of ​​the fire outlet portion of the fire outlet body, thereby adjusting the speed of the mixed gas sprayed into the first mixing chamber instead of adjusting the amount of the mixed gas, that is, the injection speed of the mixed gas is adjusted to be higher than the combustion speed of the mixed gas in the first mixing chamber, and the speed of the mixed gas sprayed through the fire outlet portion is adjusted to achieve a harmonious state without backfire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a burner in an embodiment of the present invention;

[0022] Figure 2 It is a cross-sectional view of the fire outlet body in the embodiment of the present invention in a state where the open area is relatively small;

[0023] Figure 3 It is a cross-sectional view of the fire outlet body in the embodiment of the present invention in a state where the open area is relatively large;

[0024] Figure 4 Schematic diagram of the structure of the first gas mixing chamber and the second gas mixing chamber in an embodiment of the present invention;

[0025] Figure 5 for Figure 4 A cross-sectional view of

[0026] Figure 6 It is a schematic diagram of the structure of the fire outlet in the embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings.

[0028] like Figures 1 to 6 The burner for a gas stove in this embodiment includes a first gas mixing chamber 1, the first gas mixing chamber 1 includes an annular wall 11 and a first fire cover 12 covering the annular wall 11, wherein the peripheral wall 121 of the first fire cover 12 is provided with at least two fire outlets 2 communicating with the first gas mixing chamber 1 at intervals along the circumferential direction, the fire outlet 2 includes a fire outlet portion 21 at least exposed outside the peripheral wall 121, an air inlet portion 22 located inside the peripheral wall 121, and an elastic member 23 connected between the air inlet portion 22 and the inner side of the peripheral wall 121, the elastic member 23 can drive the fire outlet 2 to move and / or rotate according to the pressure of the mixed gas sprayed to the first gas mixing chamber 1, thereby changing the gas outlet area of ​​the fire outlet portion 21. By providing a fire body 2 in the first fire cover 12 that can move and / or rotate relative to the fire body 2, the gas outlet area of ​​the fire portion 21 of the fire body 2 can be adjusted, thereby adjusting the speed of the mixed gas sprayed into the first mixing chamber 1 instead of adjusting the amount of the mixed gas, that is, the injection speed of the mixed gas is adjusted to be higher than the combustion speed of the mixed gas in the first mixing chamber 1, and the speed of the mixed gas sprayed through the fire portion 21 is adjusted to achieve a harmonious state without backfire.

[0029] Specifically, in order to achieve the connection of the elastic member 23 and change the air outlet area of ​​the fire outlet portion 21, it is preferably structurally realized that the fire outlet body 2 includes a cylinder 20 which is open on the inside and closed on the outside, and the first cylinder wall portion 201 of the cylinder 20 corresponding to the fire outlet portion 21 has a main fire outlet 202 adjacent to its outside, and the second cylinder wall portion 203 of the cylinder 20 corresponding to the air inlet portion 22 has a convex wall 204 extending outwardly adjacent to its inner side, one end of the elastic member 23 is connected to the convex wall 204 and the other end of the elastic member 23 is connected to the inner side of the peripheral wall 121, so that the elastic member 23 can drive the movement and / or rotation of the fire outlet body 2 according to the pressure of the mixed gas injected into the mixing chamber. In order to realize that the fire outlet portion 21 of the fire outlet body 2 has more fire outlet forms, the first cylinder wall portion 201 of the cylinder body 20 corresponding to the fire outlet portion 21 of the present embodiment is respectively provided with at least two first auxiliary fire outlet holes 205 on both sides of the fire outlet, and the center line of each first auxiliary fire outlet hole 205 has an angle with the axis of the cylinder body 20, and the first auxiliary fire outlet hole 205 has an angle with the axis of the cylinder body 20 so as to form a rotating fire, and the secondary air can be better supplemented when the fire outlet body 2 rotates, and on the other hand, the fire can be better transferred between each other. In addition, in order to better transfer fire between adjacent fire outlet bodies 2, at least two second auxiliary fire outlet holes 206 are opened at the outer closed end of the cylinder body 20, and the main fire outlet 202 is connected to one of the second auxiliary fire outlet holes 206 through the fire transfer channel 3. In order to prevent the fire body 2 from being separated from the first fire cover 12 during the movement, the first barrel wall portion 201 of the barrel 20 corresponding to the fire portion 21 has an anti-detachment member 4 to prevent the fire body 2 from being separated from the first fire cover 12. The anti-detachment member 4 of this embodiment is in a block shape. In order to better introduce the mixed gas into the fire cover and maintain the mixed gas speed in the first gas mixing chamber 1 above the combustion speed, the annular wall 11 of the first gas mixing chamber 1 is adjacent to the upper part thereof and further has an inwardly extending partition ring wall 10. The center of the partition ring wall 10 has an air inlet 101 for the mixed gas to enter the fire cover. The periphery of the air inlet 101 extends toward the fire cover with a convex ring 220. Since the caliber of the convex ring 220 is smaller than the upper part of the first gas mixing chamber 1, the mixed gas can be maintained above the combustion speed when entering the fire cover through the convex ring 220. At the same time, the movement and / or rotation of the fire body 2 can also prevent the combustion flashback occurring inside the fire body 2.

[0030] In order to meet the cooking needs of users, the second air mixing chamber 6 is arranged outside the first air mixing chamber 1 to form a double ring fire. The second air mixing chamber 6 is connected to the first air mixing chamber 1 through a connector 5. The connector 5 includes a connecting plate 51 extending radially outward along the middle of the annular wall 11 of the first air mixing chamber 1. The second air mixing chamber 6 includes a bottom wall directly using the connecting plate 51, an inner annular wall 61 and an outer annular wall 62 spaced apart from the first air mixing chamber 1, and a second fire cover 63 covering the inner annular wall 61 and the outer annular wall 62. The bottom wall of the second air mixing chamber 6 is provided with at least two vertical air supplement channels 7 at intervals along the circumferential direction on the inner periphery of the inner annular wall 61. At the same time, the vertical air supplement channels 7 opened on the bottom wall of the second air mixing chamber 6 can supplement secondary air to the first air mixing chamber 1 and the second air mixing chamber 6, respectively, to promote full combustion of the two. In order to avoid the secondary air from "scrambling" between the first air mixing chamber 1 and the second air mixing chamber 6, a partition 8 is further provided on the annular wall 11 of the first air mixing chamber 1. The partition 8 can separate the vertical air supply channel 7 into two relatively independent spaces, which are connected to the fire outlet area of ​​the first air mixing chamber 1 and the outer wall area of ​​the second air mixing chamber 6 respectively. The bottom wall of the second air mixing chamber 6 is radially provided with a transmission channel 9 for connecting the vertical air supply channel 7 to the outer wall area of ​​the second air mixing chamber 6. Correspondingly, the bottom wall of the second air mixing chamber 6 is radially provided with a secondary air supply channel 30 spaced apart from the transmission channel 9. The transmission channel 9 can make the secondary air in the vertical air supply channel 7 be better transmitted to the outer wall area of ​​the second air mixing chamber 6. When replenishing air, the secondary air in the stove is divided into two paths through the vertical air supply channel 7, one of which is transmitted to the outer wall area of ​​the second air mixing chamber 6 through the transmission channel 9. Correspondingly, in order to realize the secondary air in the stove through the vertical air supply channel When the vertical air supply channel 7 goes up, it is replenished to the first air mixing chamber 1. The partition 8 of this embodiment includes a partition plate 81 extending outward along the annular wall 11 and in a ring shape. The outer end of the partition plate 81 has a folded edge 82 folded upward. There is a first interval 40 between the folded edge 82 and the annular wall 11 of the first air mixing chamber 1. When replenishing air, the secondary air goes up through the vertical air supply channel 7 and is divided into two paths, one of which is transmitted to the fire outlet area of ​​the first air mixing chamber 1 through the first interval 40; in addition, the folded edge 82 of the partition plate 81 can also prevent the overflow of liquid entering the partition plate 81 along the annular wall 11 of the first air mixing chamber 1 from overflowing, and has a certain function of containing the overflow.Taking into account the influence of overflow during the cooking process, a baffle plate 50 is provided on the inner annular wall 61 of the second air mixing chamber 6 above the vertical air supply channel 7, and a second interval 60 is provided between the inner end of the baffle plate 50 and the annular wall 11 of the first air mixing chamber 1. The vertical air supply channel 7 supplies air to the fire outlet area of ​​the first air mixing chamber 1 through the second interval 60. Due to the setting of the baffle plate 50, overflow during the cooking process can be prevented from entering the vertical air supply channel 7. When replenishing air, the secondary air in the stove is divided into two paths through the vertical air supply channel 7, one of which is transmitted to the fire outlet area of ​​the first air mixing chamber 1 through the first interval 40. In order to avoid the air supply of the first air mixing chamber 1 being blocked due to the setting of the baffle plate 50, the formation of the second interval 60 can realize that the secondary air continues to flow from the first interval 40 through the second interval 60 to the periphery of the first air mixing chamber 1. Finally, in order to better gather the combustion heat of the second air mixing chamber 6 during the cooking process to improve the combustion efficiency, the connector 5 also includes a connecting foot 52 that continues to extend outward along the transmission channel 9, and the connecting foot 52 is used to connect the energy collecting cover 70 located outside the second air mixing chamber 6. Of course, in order to realize that the energy collecting cover 70 can preheat the secondary air, the energy collecting cover 70 includes an annular cover body, which is a double-layer structure composed of an upper cover 701 and a lower cover 702. A cavity 703 is formed between the upper cover 701 and the lower cover 702. The cavity 703 is connected to the outer wall area of ​​the second air mixing chamber 6 and each transmission channel 9 and the secondary air supplement channel 30. The upper cover 701 is provided with at least two air inlet holes 7011 for external air to enter the cavity 703 at intervals along the circumferential direction. The preheating path of the secondary air is divided into three paths: the first path is that the external secondary air directly enters the cavity 703 of the cover through the air inlet 7011 for preheating, and is supplemented to the fire outlet area of ​​the first air mixing chamber 1 through the secondary air supplement channel 30; the second path is that the secondary air in the stove passes through the first interval 40 and the second interval 60 when ascending through the vertical air supplement channel 7 to supplement the fire outlet area of ​​the first air mixing chamber 1; the third path is that the secondary air in the stove passes through the transmission channel 9 when ascending through the vertical air supplement channel 7 to the outer wall area of ​​the second air mixing chamber 6; the secondary air of the second and third paths can be mutually regulated and circulated in the secondary air supplement channel 30, and when the combustion load of the second air mixing chamber 6 increases, more air can be sucked from the secondary air supplement channel 30; and when the combustion load of the first air mixing chamber 1 increases, more air can be sucked from the secondary air supplement channel 30. Finally, in order to be able to effectively suck the secondary air from bottom to top to the vertical air supplement channel 7, preferably, each air inlet 7011 has an angle with the central axis of the cover. Since there is an angle between each air inlet hole 7011 and the central axis of the cover body, a rotating suction force for the secondary air can be formed.

[0031] In summary, the output of the burner can be adjusted by changing the movement and / or rotation of the fire body 2 and thereby changing the gas outlet area of ​​the fire section 21. That is, when a high output is required, the elastic member 23 is compressed so that the main fire outlet 202 of the fire section 21 is in a state of larger open area. When a low output is required, the position of the elastic member 23 is controlled so that the main fire outlet 202 of the fire section 21 is in a state of smaller open area. At the same time, the fire body 2 and the fire cover need to be in close contact during movement and / or rotation to prevent the leakage of the mixed gas, which can easily induce instability and non-uniformity of combustion. In addition, the first auxiliary fire outlet 205 and the second auxiliary fire outlet 206 of the fire body 2 also have the function of transmitting fire.

Claims

1. A burner for a gas stove, comprising a first gas mixing chamber (1), wherein the first gas mixing chamber (1) comprises an annular wall (11) and a first fire cover (12) covering the annular wall (11), characterized in that: The peripheral wall (121) of the first fire cover (12) is provided with at least two fire outlet bodies (2) in communication with the first gas mixing chamber (1) at intervals along the circumferential direction, the fire outlet body (2) comprising a fire outlet portion (21) at least exposed outside the peripheral wall (121), an air inlet portion (22) located inside the peripheral wall (121), and an elastic member (23) connected between the air inlet portion (22) and the inner side of the peripheral wall (121), the elastic member (23) being able to drive the fire outlet body (2) to move and / or rotate according to the pressure of the fuel gas injected into the first gas mixing chamber (1), thereby changing the gas outlet area of ​​the fire outlet portion (21); The fire outlet body (2) comprises a cylinder (20) which is open on the inside and closed on the outside, the first cylinder wall portion (201) of the cylinder (20) corresponding to the fire outlet portion (21) having a main fire outlet (202) adjacent to its outside, and the second cylinder wall portion (203) of the cylinder (20) corresponding to the air inlet portion (22) having a convex wall (204) extending outward adjacent to its inside, one end of the elastic member (23) is connected to the convex wall (204) and the other end of the elastic member (23) is connected to the inside of the peripheral wall (121), so that the elastic member (23) can drive the fire outlet body (2) to move and / or rotate according to the pressure of the fuel gas injected into the first gas mixing chamber (1); The first wall portion (201) of the cylinder (20) corresponding to the fire outlet portion (21) is provided with at least two first auxiliary fire outlet holes (205) on both sides of the main fire outlet (202), and the center line of each first auxiliary fire outlet hole (205) forms an angle with the axis of the cylinder (20); At least two second auxiliary fire outlet holes (206) are provided at the outer closed end of the cylinder (20), and the main fire outlet (202) is connected to one of the second auxiliary fire outlet holes (206) through a fire transmission channel (3); The first cylinder wall portion (201) of the cylinder (20) corresponding to the fire outlet portion (21) has an anti-detachment member (4) for preventing the fire outlet body (2) from detaching from the first fire cover (12); The annular wall (11) of the first gas mixing chamber (1) is provided with an inwardly extending partition annular wall (10) adjacent to the upper portion thereof, the partition annular wall (10) having an air inlet (101) at the center thereof for allowing gas to enter the first fire cover (12), and a convex ring (220) extending from the periphery of the air inlet (101) toward the first fire cover (12); The first air mixing chamber (1) is connected to a second air mixing chamber (6) via a connecting body (5) at its periphery. The connecting body (5) includes a connecting plate (51) extending radially outward along the middle of the annular wall (11) of the first air mixing chamber (1). The second air mixing chamber (6) includes a bottom wall directly using the connecting plate (51), an inner annular wall (61) and an outer annular wall (62) spaced apart from the first air mixing chamber (1), and a second fire cover (63) covering the inner annular wall (61) and the outer annular wall (62). The bottom wall of the second air mixing chamber (6) is provided with at least two vertical air supply channels (7) spaced apart along the circumferential direction on the inner periphery of the inner annular wall (61). A partition (8) is provided on the annular wall (11) of the first air mixing chamber (1), and the partition (8) can divide the vertical air supply channel (7) into two relatively independent spaces, which are respectively connected to the fire outlet area of ​​the first air mixing chamber (1) and the outer wall area of ​​the second air mixing chamber (6).

2. The burner for a gas stove according to claim 1, characterized in that: The bottom wall of the second air mixing chamber (6) is radially provided with a transmission channel (9) for connecting the vertical air supply channel (7) to the outer wall area of ​​the second air mixing chamber (6); correspondingly, the bottom wall of the second air mixing chamber (6) is also radially provided with a secondary air supply channel (30) spaced apart from the transmission channel (9).

3. The burner for a gas stove according to claim 2, characterized in that: The partition (8) includes a partition plate (81) extending outwardly along the annular wall (11) and having an annular shape. The outer end of the partition plate (81) has a folded edge (82) folded upward. A first gap (40) is provided between the folded edge (82) and the annular wall (11) of the first gas mixing chamber (1).

4. The burner for a gas stove according to claim 3, characterized in that: The inner annular wall (61) of the second air mixing chamber (6) is provided with a shielding plate (50) above the vertical air supply channel (7), and a second gap (60) is provided between the inner end of the shielding plate (50) and the annular wall (11) of the first air mixing chamber (1), and the vertical air supply channel (7) supplies air to the fire outlet area of ​​the first air mixing chamber (1) through the second gap (60).

5. The burner for a gas stove according to any one of claims 2 to 4, characterized in that: The connecting body (5) further comprises a connecting foot (52) extending outwardly along the transmission channel (9), wherein the connecting foot (52) is used to connect to an energy collecting cover (70) located outside the second gas mixing chamber (6).

6. The burner for a gas stove according to claim 5, characterized in that: The energy-gathering hood (70) comprises an annular hood body, wherein the hood body is a double-layer structure consisting of an upper hood (701) and a lower hood (702), wherein a cavity (703) is formed between the upper hood (701) and the lower hood (702), wherein the cavity (703) is connected to the outer wall area of ​​the second mixing chamber (6) and each of the transmission channels (9) and the secondary air replenishment channel (30), and the upper hood (701) is provided with at least two air inlet holes (7011) spaced apart along the circumferential direction for allowing external air to enter the cavity (703).

7. The burner for a gas stove according to claim 6, characterized in that: There is an angle between each of the air inlet holes (7011) and the central axis of the cover body.

Images