A burner with a combed gas ring

Abstract

The present invention discloses a burner with a combing gas ring, comprising a burner head and a fire cover, wherein the burner head is provided with a premixing chamber opening upward and at least two gas channels, the fire cover is provided with a gas mixing chamber opening downward and connected to the premixing chamber, a combing gas ring located above the outlet of the gas channel is provided between the premixing chamber and the gas mixing chamber, the outer side of the combing gas ring abuts against or connects to the outer ring wall of the premixing chamber, and a gap for gas to pass through is left between the inner side and the inner ring wall of the premixing chamber or the gas mixing chamber. The present invention provides a combing gas ring located above the outlet of the gas channel between the premixing chamber of the burner head and the gas mixing chamber of the fire cover, so that when the gas flows upward through the combing gas ring, its flow velocity is reduced and its flow direction is changed, thereby combing the flow direction and flow velocity of the gas flowing into the premixing chamber and the gas mixing chamber, making the combustion more uniform and stable, and at the same time effectively suppressing the flameout noise.

Description

Technical Field

[0001] The invention relates to the technical field of stoves, and in particular to a burner head for a stove. Background Art

[0002] The combustion system of a household gas stove is mainly composed of a burner and a fire cover. The gas premixed in the burner mixing chamber directly reaches the fire cover through the burner gas distribution channel and burns through the fire holes. However, the gas speed from the burner gas distribution channel to each position of the fire cover is different in the existing burner, which will lead to inconsistent flame states during combustion, affecting the combustion effect and combustion performance.

[0003] In addition, when the burner performs the flameout operation, especially the outer fire cover, it is generally not the entire outer fire cover that is extinguished at the same time, but a part of it is extinguished first, and then the whole fire is extinguished in a short time due to the complete cutting off of the gas. After the outer fire cover is partially extinguished, the gas mixing chamber of the local fire cover forms a negative pressure, and the external air is pressed into the gas mixing chamber of the outer fire cover from the fire hole. When the external air is mixed with the residual gas in the gas mixing chamber of the fire cover and the premixing chamber of the outer ring of the burner to a certain ratio, it is ignited by the fire hole that is still burning, causing explosion and generating flameout noise. Summary of the invention

[0004] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes a burner with a combing ring, which can not only comb the flow direction and flow rate of the gas in the burner premixing chamber and the fire cover mixing chamber to make the combustion more uniform and stable, but also can effectively suppress the flameout noise.

[0005] According to the burner with a combing gas ring provided above, it is realized by the following technical solution:

[0006] A burner with a combing gas ring comprises a burner head and a fire cover, wherein the burner head is provided with a premixing chamber opening upward and at least two gas channels, the fire cover is arranged above the premixing chamber and is provided with a mixing chamber opening downward, the mixing chamber is connected to the premixing chamber, wherein a combing gas ring is provided between the premixing chamber and the mixing chamber and is located above the outlet of the gas channel, the outer side of the combing gas ring abuts against or is connected to the outer ring wall of the premixing chamber, and a gap is left between the inner side and the inner ring wall of the premixing chamber or the mixing chamber for the gas to pass through.

[0007] In some embodiments, the height H of the combing air ring is 2 mm to 8 mm, and the height difference Δh between the bottom of the combing air ring and the outlet of the gas channel is 4 mm to 6 mm.

[0008] In some embodiments, the combing air ring is arranged inside or at the opening of the premixing chamber, and the combing air ring includes a ring-shaped guide portion that is arranged obliquely in the vertical direction, the outer side of the guide portion is connected to or abuts against the outer ring wall of the premixing chamber, and a gap for the gas to pass through is left between the inner side and the inner ring wall of the premixing chamber.

[0009] In some embodiments, the combing air ring also includes a ring-shaped partition, the lower side of the partition is connected to the guide part, the upper side extends upward into the air mixing chamber and leaves a gap between the top of the air mixing chamber, and the partition divides the air mixing chamber into an inner air mixing chamber and an outer air mixing chamber, and the outer air mixing chamber is connected to the inner air mixing chamber through the gap.

[0010] In some embodiments, the combing air ring also includes a blocking portion, which is a transversely arranged annular plane or an annular inclined plane inclined in the vertical direction, and one side of the blocking portion is connected to the guide portion, and a gap for the gas to pass through is left between the other side and the inner annular wall of the premixing chamber.

[0011] In some embodiments, the combing ring further includes a partition portion, the lower side of the partition portion is connected to the blocking portion, the upper side of the partition portion extends upward into the air mixing chamber and leaves a gap between the top of the air mixing chamber, and the partition portion divides the air mixing chamber into an inner air mixing chamber and an outer air mixing chamber, and the outer air mixing chamber is connected to the inner air mixing chamber through the gap.

[0012] In some embodiments, a convex edge extending outward is provided on the outer side of the flow guide portion, and the convex edge is connected to or abuts against the outer annular wall of the premixing chamber.

[0013] In some embodiments, the guide portion is an inclined surface or a curved surface.

[0014] In some embodiments, an outer edge of the combing air ring is clamped between an outer annular wall of the mixing chamber and an outer annular wall of the premixing chamber.

[0015] In some embodiments, the inner side of the outer ring wall of the premixing chamber is provided with a groove sunken toward the inner side of the outer ring wall, and the outer side of the combing air ring is provided with a mounting boss extending outward, and the mounting boss is inserted into the groove; or, the inner side of the outer ring wall of the premixing chamber is provided with a groove extending toward the inner ring wall, and the outer edge of the combing air ring is inserted into the groove.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] A burner with a combing gas ring of the present invention is provided with a combing gas ring located above the outlet of the gas passage between the premixing chamber of the burner head and the mixing chamber of the fire cover, so that when the gas flows upward through the combing gas ring, its flow velocity is reduced and the flow direction is changed, thereby combing the flow direction and flow velocity of the gas flowing into the premixing chamber and the mixing chamber, ensuring that the gas flow velocity flowing into each position of the mixing chamber is roughly the same, making the combustion more uniform and stable, and at the same time effectively suppressing the flameout noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the structural decomposition of the burner in Example 1 of the present invention;

[0019] Figure 2 is a cross-sectional view of a burner in Embodiment 1 of the present invention, wherein the fire cover is hidden;

[0020] Figure 3 is a schematic structural diagram of a combing air ring in Embodiment 1 of the present invention;

[0021] Figure 4 yes Figure 2 A partial enlarged view of part A;

[0022] Figure 5 is a cross-sectional view of a burner in Embodiment 2 of the present invention, wherein the fire cover is hidden;

[0023] Figure 6 is a schematic structural diagram of a combing air ring in Embodiment 2 of the present invention;

[0024] Figure 7 yes Figure 5 A partial enlarged view of part B;

[0025] Figure 8 is a schematic structural diagram of a combing air ring in Embodiment 3 of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the comb air ring in Example 4 of the present invention. DETAILED DESCRIPTION

[0027] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0028] Example 1

[0029] The outer ring gas flow path of the existing burner is as follows: after the gas flows out from the gas channel of the burner, it is roughly divided into two parts, one part flows directly upward into the fire cover cavity, and the other part flows to the left and right sides of the burner gas channel outlet. First, the outer ring gas cavity of the burner is gradually filled and then overflows upward to the fire cover cavity. The gas in the fire cover cavity flows out from the fire hole of the fire cover and burns. Since the gas flow rate flowing directly upward from the gas channel of the burner is greater than the gas flow rate flowing upward from the outer ring gas cavity of the burner, the gas flow rate flowing into each position of the fire cover cavity is different. When the existing burner performs the flameout operation, the gas flow rate of the gas channel of the burner drops sharply, and after the gas in the corresponding local fire cover cavity is burned out, the corresponding local fire hole is extinguished first, and then all other fire holes are extinguished in a short time due to the complete cutting off of the gas. During this process, negative pressure is formed in the fire cover cavity, causing external air to be pressed into the fire cover cavity from the fire holes of the fire cover. When the external air is mixed with the residual gas in the fire cover cavity and the outer ring air cavity of the burner to reach a certain proportion, the still burning fire holes are ignited, causing explosion and generating flameout noise, affecting the user experience.

[0030] like Figure 1-4 As shown, in order to solve the above problems, this embodiment provides a burner with a combing gas ring, a burner head 1, a fire cover 2 and a combing gas ring 3. The burner head 1 is provided with a premixing chamber 11 opening upward and at least two gas channels 12 connected to the premixing chamber 11. The gas mixing chamber 11 is an annular structure with an inner ring wall and an outer ring wall. At least two gas channels 12 are evenly spaced along the circumferential direction of the premixing chamber 11 to ensure that the gas entering the premixing chamber 11 is relatively uniform. The fire cover 2 is arranged above the premixing chamber 11 and is provided with a gas mixing chamber 21 opening downward. The gas mixing chamber 21 is an annular structure with an inner ring wall and an outer ring wall, and the gas mixing chamber 21 is connected to the premixing chamber 11. A combing gas ring 3 is provided between the premixing chamber 11 and the gas mixing chamber 21 and is located above the outlet of the gas channel 12. The combing gas ring 3 generally divides the premixing chamber 11 into a lower premixing chamber 111 and an upper premixing chamber 112. The outer side of the combing gas ring 3 abuts against or is connected to the outer ring wall of the premixing chamber 11, and a gap 4 for gas to pass through is reserved between the inner side and the inner ring wall of the premixing chamber 11 or the gas mixing chamber 21. The lower premixing chamber 111 is connected to the gas channel 12 and the gap 4, respectively, and the upper premixing chamber 112 is connected to the gap 4 and the gas mixing chamber 21, respectively.

[0031] Therefore, a combing gas ring 3 located above the outlet of the gas channel 12 is added between the premixing chamber 11 and the mixing chamber 21, so that the gas flow path of the burner is changed. The specific flow path of the gas is: the gas flows vertically upward from the gas channel 12, and its flow velocity is reduced and its flow direction is changed under the influence of the combing gas ring 3. It flows along the combing gas ring 3 and flows upward from the pore 4 into the upper premixing chamber 112 for premixing. The gas first gradually fills the upper premixing chamber 112, and then fills the entire upper premixing chamber 112 and overflows upward to the mixing chamber 21 of the fire cover 2, so that the gas flow rate flowing into the mixing chamber 21 of the burner fire cover 2 at each position is roughly the same, and finally flows out from the fire hole of the burner fire cover and burns. In addition, since the gas flow rates at various positions of the gas mixing chamber 21 of the burner fire cover 2 are roughly the same, when the burner is extinguished, the flow rate is simultaneously reduced due to the gas cut-off, and the residual gas inside the burner is burned out almost at the same time, and the fire holes of the entire burner fire cover 2 are extinguished at the same time. No negative pressure will be formed in the gas mixing chamber 21 of the fire cover 2, and further, no conditions will be created for external air to enter the gas mixing chamber 21 of the fire cover 2 to produce combustion and explosion. Therefore, the flameout noise can be effectively reduced.

[0032] It can be seen that the burner with a combing gas ring in this embodiment is provided with a combing gas ring 3 located above the outlet of the gas channel 12 between the premixing chamber 11 and the mixing chamber 21, and the outer side of the combing gas ring 3 abuts or is connected to the outer ring wall of the premixing chamber 11, and a gap 4 for the gas to pass through is left between the inner side and the inner ring wall of the premixing chamber 11 or the mixing chamber 21, so that when the gas flows upward through the combing gas ring 3, its flow velocity is reduced and the flow direction is changed, thereby combing the flow direction and flow velocity of the gas flowing into the premixing chamber 11 of the burner head 1 and the mixing chamber 21 of the fire cover 2, ensuring that the gas flow velocity flowing into each position of the mixing chamber 21 is roughly the same, making the combustion more uniform and stable, and at the same time effectively suppressing the flameout noise, thereby improving the user experience.

[0033] Preferably, the number of the gas channels 12 is four, and the four gas channels 12 are evenly spaced apart in the circumferential direction to improve gas distribution uniformity.

[0034] Preferably, the combing gas ring 3 of this embodiment is arranged inside the premixing chamber 11, and the height difference Δh between the bottom of the combing gas ring 3 and the outlet of the gas channel is 4 mm to 6 mm, so as to define the lower premixing chamber 111 and the upper premixing chamber 112 connected by the pore 4, so as to effectively ensure that the lower premixing chamber 111 and the upper premixing chamber 112 have a large enough space, so that the gas flows from the gas channel 12 into the lower premixing chamber 111 for premixing and fills the lower premixing chamber 111, and ensures that the gas flowing from the pore 4 into the upper premixing chamber 112 first fills the upper premixing chamber 112 and then overflows upward into the mixing chamber 21, so as to ensure that the gas flow rate flowing into each position of the mixing chamber 21 is substantially the same. In other embodiments, the combing gas ring 3 can be arranged at the opening of the premixing chamber 11.

[0035] Preferably, the height H of the combing gas ring 3 is 2 mm to 8 mm, so that when the gas enters the upper premixing chamber 112 from the pore 4, it can first fill the upper premixing chamber 112 and then overflow to the gas mixing chamber 21 of the fire cover 2, ensuring that the gas flow rate flowing into the gas mixing chamber 21 of the fire cover 2 at each position is substantially the same. In this embodiment, the height of the combing gas ring 3 is preferably 4.5 mm.

[0036] like Figure 3-4 As shown, specifically, the combing gas ring 3 includes a guide portion 31 and a blocking portion 33 which are arranged obliquely in the vertical direction and are annular. The guide portion 31 is an annular inclined surface with a low outer side and a high inner side, and its outer side is connected to or abuts against the outer annular wall of the premixing chamber 11, and its inner side is connected to the blocking portion 33. The blocking portion 33 is a transversely arranged annular plane, and a gap 4 for the gas to pass is left between the side of the blocking portion 33 away from the guide portion 31 and the inner annular wall of the premixing chamber 11. Therefore, the setting of the guide part 31 can better guide the gas to flow upward to the blocking part 33. When the gas is transmitted upward through the guide part 31, its flow direction is bent, and it flows to the blocking part 33 under the guidance of the guide part 31. Affected by the blocking part 33, its flow velocity is reduced and the flow direction is bent again, flowing along the bottom surface of the blocking part 33 and flowing toward the premixing chamber 11 in the direction toward the horizontal plane and the central axis of the premixing chamber 11, thereby combing the flow direction and flow velocity of the gas flowing into the upper premixing chamber 112 and the mixing chamber 21, ensuring that the gas flow velocity flowing into each position of the mixing chamber 21 is roughly the same, making the combustion more uniform and stable, and at the same time effectively suppressing the flameout noise.

[0037] In other embodiments, the flow guide portion 31 may also be an annular arc surface with a lower outer side and a higher inner side, so as to make the gas flow toward the blocking portion 33 smoother. The blocking portion 33 may be designed as an annular inclined surface arranged obliquely in the vertical direction.

[0038] More specifically, a convex edge 34 extending outward is provided on the outer side of the guide portion 31. The convex edge 34 is an annular plane, and its horizontal plane projection covers part of the outlet of the gas channel 12. The side away from the guide portion 31 is connected to or abuts the outer annular wall of the premixing chamber 11. In this way, the gas located below the convex edge 34 will be affected by the convex edge 34 when flowing upward, so that the gas flow rate is reduced, and the flow direction is changed to be toward the horizontal plane and the central axis of the premixing chamber 11, and then it flows toward the blocking portion 33 under the guidance of the guide portion 31. Under the limitation of the convex edge 34, the guide portion 31 and the blocking portion 33, the gas flow direction makes multiple turns, further reducing the gas flow rate flowing to the pore 4.

[0039] Preferably, the lower side and the upper side of the air guide portion 31 are integrally formed with the convex edge 34 and the blocking portion 33 respectively, so as to facilitate the rapid processing and forming of the combing ring 3, save the connection process, and avoid air leakage at the connection.

[0040] The installation structure of the combing air ring 3 includes the following solutions:

[0041] The first solution: a plurality of grooves (not shown in the figure) are evenly distributed along the circumferential direction and face the inner part of the outer ring wall of the premixing chamber 11 on the inner side of the outer ring wall of the premixing chamber 11, and a mounting boss (not shown in the figure) extending outward is provided on the outer side of the combing air ring 3 (i.e., the outer side of the convex edge 34) at the position corresponding to the groove, and the mounting boss is inserted into the corresponding groove, so that the combing air ring 3 can be stably and reliably installed inside the premixing chamber 11.

[0042] The second solution: a groove is convexly provided on the inner side of the outer ring wall of the premixing chamber 11 and extends toward its inner ring wall (i.e., the inner ring wall of the premixing chamber 11). The groove can be an annular groove, or composed of a number of sub-grooves arranged at even intervals. The outer edge of the combing air ring 3 (i.e., the outer side of the convex edge 34) is inserted into the groove. In this way, the combing air ring 3 can be stably and reliably installed inside the premixing chamber 11.

[0043] The third solution is to set the combing air ring 3 between the premixing chamber 11 and the mixing chamber 21, that is, at the opening of the premixing chamber 11. During installation, the outer edge of the combing air ring 3 (that is, the outer side of the convex edge 34) is clamped between the outer ring wall of the mixing chamber 21 and the outer ring wall of the premixing chamber 11. In this way, while ensuring that the combing air ring 3 is stably and reliably installed at the opening of the premixing chamber 11, the installation structure of the combing air ring 3 is further simplified, saving manufacturing materials and processing steps of the installation structure, improving processing and assembly efficiency, and reducing costs.

[0044] Example 2

[0045] like Figure 5-7 As shown, the difference between this embodiment and embodiment 1 is that the structure of the combing gas ring 3 is different. Specifically, the combing gas ring 3 also includes a partition 32, the lower side of the partition 32 is connected to the inner side of the blocking portion 33, and the upper side extends upward to the mixing gas chamber 21 of the fire cover 2 and leaves a gap with the top of the mixing gas chamber 21 for the gas to pass through, and the partition 32 divides the mixing gas chamber 21 of the fire cover 2 into an inner mixing gas chamber 211 and an outer mixing gas chamber, and the outer mixing gas chamber is connected to the inner mixing gas chamber 211 through the gap. Preferably, the partition 32 and the blocking portion 33 are integrally formed, and the other parts are the same as those in embodiment 1.

[0046] When the gas flows upward from the outlet of the gas channel 12 into the lower premixing chamber 111, and flows upward from the lower premixing chamber 111 to the combing ring 3, its flow velocity is reduced and its flow direction is changed due to the influence of the convex edge 34, the guide portion 31 and the blocking portion 33, so that the gas first fills the lower premixing chamber 111, and then overflows upward to the inner mixing chamber 211 through the pore 4, and then passes through the gap across the upper end surface of the partition 32, flows into the outer mixing chamber, and finally flows out from the fire hole of the fire cover 2 and burns. In this way, the number of turns of the airflow is increased, and the flow path of the gas is further extended, so that the gas and air are mixed more evenly, and the combustion is improved to be more uniform and stable.

[0047] It can be seen that by adding the partition 32, the gas combing ring 3 can comb the gas flow direction and flow rate in the premixing chamber 11 of the burner head 1 and the mixing chamber 21 of the fire cover 2, which can effectively reduce the flameout noise and further extend the flow path of the gas, so that the gas and air are mixed more evenly, and the combustion is more uniform and stable.

[0048] Example 3

[0049] like Figure 8 As shown, the difference from Example 1 is that the structure of the combing ring 3 of this embodiment is different. Specifically, the combing ring 3 includes a convex edge 34 and a guide portion 31. The outer side of the guide portion 31 is integrally formed with the convex edge 34, and the gap is left between the inner side and the inner ring wall of the furnace head premixing chamber or the inner ring wall of the fire cover mixing chamber. The other parts are the same as those in Example 1.

[0050] It can be seen that, compared with Example 1, the combing air ring 3 of this embodiment omits the blocking portion 33, which reduces the processing steps and difficulty of the combing air ring 3, and is conducive to further reducing the manufacturing cost.

[0051] Example 4

[0052] like Fig. 9 As shown, the difference from Example 2 is that the structure of the combing ring 3 of this embodiment is different. Specifically, the combing ring 3 includes a convex edge 34, a guide portion 31 and a partition portion 32. The outer side of the guide portion 31 is integrally formed with the convex edge 34, and the inner side is integrally formed with the lower side of the partition portion 32. The upper side of the partition portion 32 extends upward into the gas mixing chamber of the fire cover and a gap is left between the upper side of the partition portion 32 and the top of the gas mixing chamber for the gas to pass through. In addition, the pores are left between the inner side of the partition portion 32 and the inner annular wall of the burner premixing chamber and the inner annular wall of the gas mixing chamber of the fire cover, and the partition portion 32 divides the gas mixing chamber of the fire cover into an inner gas mixing chamber and an outer gas mixing chamber, and the outer gas mixing chamber is connected to the inner gas mixing chamber through the gap. Preferably, the inner and outer sides of the guide portion 31 are respectively integrally formed with the partition portion 32 and the convex edge 34, and the other parts are the same as those in Example 2.

[0053] It can be seen that, compared with Example 2, the combing air ring 3 of this embodiment omits the blocking portion 33, which reduces the processing steps and difficulty of the combing air ring 3, and is conducive to further reducing the manufacturing cost.

[0054] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A burner with a combing gas ring, comprising a burner head (1) and a fire cover (2), wherein the burner head (1) is provided with a premixing chamber (11) opening upward and at least two gas channels (12), the fire cover (2) is arranged above the premixing chamber (11) and is provided with a gas mixing chamber (21) opening downward, the gas mixing chamber (21) being connected to the premixing chamber (11), It is characterized in that A combing gas ring (3) located above the outlet of the gas channel (12) is provided between the premixing chamber (11) and the gas mixing chamber (21), the combing gas ring (3) dividing the premixing chamber (11) into a lower premixing chamber (111) and an upper premixing chamber (112), wherein the combing gas ring (3) comprises: A flow guide (31) arranged obliquely in the vertical direction and in the shape of an annulus, the flow guide (31) being an annular inclined surface with a lower outer side and a higher inner side, the outer side of the flow guide (31) being connected to or abutting against the outer annular wall of the premixing chamber (11), and a gap (4) for the gas to pass through being left between the inner side and the inner annular wall of the premixing chamber (11); an annular partition (32), wherein the lower side of the partition (32) is connected to the guide portion (31), and the upper side extends upward into the gas mixing chamber (21) and leaves a gap with the top of the gas mixing chamber (21); the partition (32) divides the gas mixing chamber (21) into an inner gas mixing chamber (211) and an outer gas mixing chamber, and the outer gas mixing chamber is connected to the inner gas mixing chamber (211) via the gap; The gas flows upward from the outlet of the gas channel (12) into the lower premixing chamber (111), then overflows upward through the pores (4) to the inner gas mixing chamber (211), then passes through the gap across the upper end surface of the partition (32), flows into the outer gas mixing chamber, and finally flows out from the fire hole of the fire cover (2).

2. A burner with a combing gas ring, comprising a burner head (1) and a fire cover (2), wherein the burner head (1) is provided with a premixing chamber (11) opening upward and at least two gas channels (12), and the fire cover (2) is arranged above the premixing chamber (11) and is provided with a gas mixing chamber (21) opening downward, wherein the gas mixing chamber (21) is connected to the premixing chamber (11). It is characterized in that A combing gas ring (3) located above the outlet of the gas channel (12) is provided between the premixing chamber (11) and the gas mixing chamber (21), the combing gas ring (3) dividing the premixing chamber (11) into a lower premixing chamber (111) and an upper premixing chamber (112), wherein the combing gas ring (3) comprises: A flow guide portion (31) arranged obliquely in the vertical direction and in the shape of an annulus, the flow guide portion (31) being an annular inclined surface with a lower outer side and a higher inner side, the outer side of the flow guide portion (31) being connected to or abutting against an outer annular wall of the premixing chamber (11); a blocking portion (33), the blocking portion (33) being a transversely arranged annular plane, with one side of the blocking portion (33) connected to the flow guide portion (31), and a gap (4) for the gas to pass through being left between the other side of the blocking portion and the inner annular wall of the premixing chamber (11); a partition (32), wherein the lower side of the partition (32) is connected to the blocking portion (33), and the upper side of the partition (32) extends upward into the gas mixing chamber (21) and leaves a gap with the top of the gas mixing chamber (21), and the partition (32) divides the gas mixing chamber (21) into an inner gas mixing chamber (211) and an outer gas mixing chamber, and the outer gas mixing chamber is connected to the inner gas mixing chamber (211) through the gap; The gas flows upward from the outlet of the gas channel (12) into the lower premixing chamber (111), then overflows upward through the pores (4) to the inner gas mixing chamber (211), then passes through the gap across the upper end surface of the partition (32), flows into the outer gas mixing chamber, and finally flows out from the fire hole of the fire cover (2).

3. A burner with a combed gas ring according to claim 1 or 2, It is characterized in that The height H of the combing gas ring (3) is 2 mm to 8 mm, and the height difference Δh between the bottom of the combing gas ring (3) and the outlet of the gas channel is 4 mm to 6 mm.

4. A burner with a comb gas ring according to claim 1 or 2, It is characterized in that The combing air ring (3) is arranged inside or at the opening of the premixing chamber (11).

5. A burner with a combed gas ring according to claim 1 or 2, It is characterized in that A convex edge (34) extending outward is provided on the outer side of the flow guide portion (31), wherein the convex edge (34) is connected to or abuts against the outer annular wall of the premixing chamber (11), wherein the convex edge (34) is an annular plane.

6. A burner with a combed gas ring according to claim 5, It is characterized in that The outer edge of the combing air ring (3) is clamped between the outer annular wall of the mixing chamber (21) and the outer annular wall of the premixing chamber (11).

7. A burner with a combed gas ring according to claim 5, It is characterized in that The inner side of the outer ring wall of the premixing chamber (11) is provided with a groove which is sunken towards the inner side of the outer ring wall, and the outer side of the combing ring (3) is provided with a mounting boss which extends outwards, and the mounting boss is inserted into the groove; Alternatively, a groove extending towards the inner ring wall of the premixing chamber (11) is provided on the inner side of the outer ring wall, and the outer edge of the combing air ring (3) is inserted into the groove.

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