Gas distribution seat and combustor

Abstract

The invention belongs to the technical field of combustion, and particularly discloses a gas distribution seat and a combustor. An inner ring premixing cavity and an outer ring premixing cavity are formed in the upper end of the gas distribution base, an inner ring injection channel and an outer ring injection channel are arranged at the bottom of the gas distribution base, the gas outlet end of the outer ring injection channel is communicated with the outer ring premixing cavity, and on a horizontal projection plane, the inner ring injection channel stretches across the inner ring premixing cavity from the gas inlet end to the gas outlet end. The air outlet end of the inner ring injection channel extends to the position, close to the outer ring premixing cavity, of the outer ring inner enclosure wall. A communicating channel is arranged in the gas distribution base and extends to the inner ring premixing cavity from the outer ring inner enclosure wall, the outer end of the communicating channel communicates with the gas outlet end of the inner ring injection channel, and the inner end of the communicating channel communicates with the inner ring premixing cavity. According to the combustor, the injection capacity of the inner ring injection channel can be improved, the mixing uniformity of mixed gas of fuel gas and air in the inner ring injection channel and the inner ring premixing cavity is improved, the combustion stability is improved, harmful substances generated by combustion are reduced, and the combustion performance is improved.

Description

Technical Field

[0001] This invention relates to the field of combustion technology, and more particularly to a gas distribution seat and a burner. Background Technology

[0002] A gas stove is a common kitchen appliance that heats cooking utensils by igniting and burning gas. The burner is the core component of a gas stove, and its performance directly determines the performance of the gas stove.

[0003] A top-intake burner typically includes a burner head, a gas distribution seat, and a burner cap assembly arranged sequentially from bottom to top. The burner cap assembly has outer and inner ring flame holes. The upper end of the gas distribution seat has an inner and outer ring premixing chamber, and the bottom of the gas distribution seat has an inner and outer ring ejector tube. The inlet end of the inner ring ejector tube is directly opposite the nozzle on the burner head, and its outlet end is directly connected to the inner ring premixing chamber. The inlet end of the outer ring ejector tube is directly opposite the nozzle on the burner head, and its outlet end is connected to the outer ring premixing chamber. The burner head injects combustion gas into the inner and outer ring ejector tubes through the nozzles, causing the combustion gas and the ejected air to mix within the ejector tubes and flow into the corresponding premixing chambers.

[0004] The existing top-intake burners, due to the inner ring ejector tube being located at the bottom of the gas distribution seat, are limited by the size of the gas distribution seat and the position of the inner ring premixing chamber. The inner ring ejector tube is usually short, resulting in insufficient air ejection capacity and inadequate mixing of gas and air within it. This affects the uniformity of the mixed gas flowing to the inner ring burner orifice and the airflow velocity, leading to incomplete combustion and unstable combustion, thus affecting the combustion performance of the gas stove. Summary of the Invention

[0005] One of the technical problems solved by this invention is to provide a gas distributor that can effectively solve the problems of insufficient ejection capacity and insufficient air-fuel mixture caused by the short length of the inner ring ejector tube in existing gas distributors, thereby improving the ejection capacity of the inner ring ejector tube and enhancing the fullness of air-fuel mixture within the inner ring ejector tube.

[0006] The second technical problem solved by this invention is to provide a burner that can effectively solve the problems of incomplete combustion and poor combustion stability caused by the mixing and supplementation of air and gas in existing burners, thereby improving combustion completeness and combustion stability and enhancing the performance of the burner.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A gas distributor has an inner ring premixing cavity at its upper end and an outer ring premixing cavity spaced around the inner ring premixing cavity. The bottom of the gas distributor has an inner ring ejector channel and an outer ring ejector channel. The outlet end of the outer ring ejector channel is connected to the outer ring premixing cavity. On a horizontal projection plane, the inner ring ejector channel spans the inner ring premixing cavity from the inlet end to the outlet end, and the outlet end of the inner ring ejector channel extends to the inner wall of the outer ring premixing cavity near the outer ring inner wall of the outer ring premixing cavity.

[0009] The gas distribution seat has a connecting channel inside, which extends from the inner wall of the outer ring to the inner ring premixing chamber. The inlet end of the connecting channel is connected to the outlet end of the inner ring ejector channel, and the outlet end of the connecting channel is connected to the inner ring premixing chamber.

[0010] Compared with the prior art, the gas distributor of the present invention has the following advantages: Because the inner ring ejector channel spans the inner ring premixing cavity from the inlet to the outlet on the horizontal projection plane, and the inner ring ejector channel is connected to the inner ring premixing cavity through a connecting channel, the outlet end of the inner ring ejector channel and the inner ring premixing cavity are offset on the horizontal plane. This allows for an increase in the length of the inner ring ejector channel while maintaining the overall outer diameter of the gas distributor, thereby enhancing the ejector capacity of the inner ring ejector channel for air and improving the uniformity of air and fuel mixing within the inner ring ejector channel. Simultaneously, due to the outlet end of the inner ring ejector channel… The gas end extends to the inner wall of the outer ring premixing chamber, while the connecting channel extends from the inner wall of the outer ring to the inner ring premixing chamber. This allows for a significant increase in the distance between the outlet end of the inner ring ejector channel and the inner ring premixing chamber, as well as an increase in the length of the connecting channel, while maintaining the same distance between the inner and outer ring premixing chambers and avoiding communication between the inner ring ejector channel and the outer ring premixing chamber. This effectively increases the overall length of the inner ring ejector channel and the connecting channel, extends the flow path of the airflow from the inlet end of the inner ring ejector channel to the inner ring premixing chamber, and effectively improves the mixing uniformity of air and fuel gas before flowing into the inner ring premixing chamber.

[0011] In one embodiment, the cross-sectional area of ​​the air outlet of the inner ring ejector channel is smaller than the cross-sectional area of ​​the air inlet of the connecting channel.

[0012] In one embodiment, the connecting channel is located above the inner ring ejection channel.

[0013] In one embodiment, the bottom of the gas distribution seat has an inner ring ejector tube, the inner cavity of the inner ring ejector tube forms the inner ring ejector channel, a portion of the inner ring ejector tube wall forms the lower channel wall of the connecting channel, the outlet end of the inner ring ejector tube is spaced apart from the inner wall of the outer ring to form an inner ring vent, the inner ring vent connects the inner ring ejector channel and the connecting channel, and the ventilation area of ​​the inner ring vent is greater than or equal to the ventilation cross-sectional area of ​​the outlet end of the inner ring ejector channel.

[0014] In one embodiment, the gas distribution seat includes a lower seat body, a middle seat body, and an upper seat body. The lower seat body is detachably installed on the lower side of the middle seat body and together with the middle seat body forms the outer ring ejection channel and the inner ring ejection channel. The upper seat body is detachably installed on the upper side of the middle seat body, and the upper seat body and the middle seat body together form the outer ring premixing cavity, the inner ring premixing cavity, and the connecting channel.

[0015] In one embodiment, the lower seat has a lower arc-shaped portion, the lower arc-shaped portion has an upward-opening lower arc-shaped groove, and the outer side of the inner ring groove wall of the lower arc-shaped groove is connected to an inner ring lower half-tube portion and an outer ring lower half-tube portion.

[0016] The bottom of the intermediate seat has an upper arc-shaped part, an inner ring upper half tube part and an outer ring upper half tube part. The upper arc-shaped part has an upper arc-shaped groove with the opening facing downward. The outer ring upper plate tube part is connected to the outside of the inner ring groove wall of the upper arc-shaped groove. The inner ring upper half tube part and the inner ring groove wall of the upper arc-shaped groove are spaced apart to form an inner ring vent.

[0017] The lower arc-shaped part and the upper arc-shaped part are fastened together and enclosed to form an outer ring ventilation cavity. The outer ring ventilation cavity is connected to the outer ring premixing cavity. The inner wall of the outer ring includes the outer ring groove wall of the lower arc-shaped groove and the outer ring groove wall of the upper arc-shaped groove.

[0018] The upper half of the outer ring and the lower half of the outer ring are connected by interlocking to form the outer ring ejection channel, which is connected to the outer ring venting cavity. The upper half of the inner ring and the lower half of the inner ring are connected by interlocking to form the inner ring ejection channel, which is connected to the inner ring ejection channel and the connecting channel.

[0019] In one embodiment, the intermediate seat includes an intermediate plate portion and an intermediate outer ring portion disposed around the outer periphery of the intermediate plate portion, and the upper seat includes an upper inner ring portion and an upper outer ring portion sleeved together at an inner and outer interval, wherein the upper inner ring portion and the intermediate seat together form the inner ring premixing cavity.

[0020] The upper outer ring portion is spaced apart and disposed inside the middle outer ring portion. The upper outer ring portion, the middle outer ring portion, and the middle plate portion together form the outer ring premixing cavity. The inner wall of the outer ring includes the upper outer ring portion.

[0021] The upper seat also includes a connecting bridge portion between the upper inner ring portion and the upper outer ring portion, and the connecting bridge portion and the intermediate seat form the connecting channel.

[0022] In one embodiment, the gas distribution seat further includes an annular inner ring guide, which is installed in the inner ring premixing cavity, and the outer wall of the inner ring guide is in contact with the circumferential cavity wall of the inner ring premixing cavity.

[0023] In one embodiment, the inner ring guide is die-cast within the inner ring premixing cavity.

[0024] The second technical problem mentioned above is solved by the following technical solution:

[0025] A burner comprising a gas distribution seat as described in any of the above.

[0026] Compared with the prior art, the burner described in this invention has the following advantages: by adopting the above-mentioned gas distribution seat, the combustion stability of the burner can be improved, the harmful substances produced by combustion can be reduced, and the combustion performance of the gas stove can be improved. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the gas distribution seat provided in Embodiment 1 of the present invention from a first perspective.

[0028] Figure 2 This is a schematic diagram of the gas distribution seat provided in Embodiment 1 of the present invention from a second perspective.

[0029] Figure 3 This is a cross-sectional view of the gas distribution seat provided in Embodiment 1 of the present invention;

[0030] Figure 4 for Figure 3 A magnified view of a section at point I;

[0031] Figure 5 This is a schematic diagram of the disassembled structure of the gas distribution seat provided in Embodiment 1 of the present invention;

[0032] Figure 6 This is a schematic diagram of the lower seat provided in Embodiment 1 of the present invention from a certain perspective;

[0033] Figure 7 This is a schematic diagram of the lower support body provided in Embodiment 1 of the present invention from another perspective;

[0034] Figure 8 A schematic diagram of the intermediate support body provided in Embodiment 1 of the invention from one viewpoint;

[0035] Figure 9 A schematic diagram of the intermediate support body provided in Embodiment 1 of the invention from another perspective;

[0036] Figure 10 This is a schematic diagram of the upper seat provided in Embodiment 1 of the present invention from a certain perspective;

[0037] Figure 11 This is a schematic diagram of the upper seat provided in Embodiment 1 of the present invention from another perspective;

[0038] Figure 12 This is a schematic diagram of the burner provided in Embodiment 2 of the present invention;

[0039] Figure 13 This is a cross-sectional view of the burner provided in Embodiment 2 of the present invention;

[0040] Figure 14 for Figure 13 A magnified view of a section at point J;

[0041] Figure 15 This is a schematic diagram of the disassembled structure of the burner provided in Embodiment 2 of the present invention.

[0042] Label Explanation:

[0043] 100. Gas distribution seat; 200. Burner head assembly; 201. Burner head seat; 202. Nozzle; 203. Positioning protrusion ring; 2031. Positioning slot; 300. Inner ring burner cap; 301. Inner ring burner hole; 400. Outer ring burner cap; 401. Outer ring burner hole;

[0044] 1. Intermediate seat; 11. Upper half of inner ring tube; 12. Upper half of outer ring tube; 13. Upper arc-shaped part; 131. Upper arc-shaped groove; 132. Middle inner wall; 14. Intermediate plate; 141. Outer ring vent; 15. Intermediate outer ring; 16. Divider; 17. Upper positioning protrusion; 18. Upper fixing part; 19. Lower fixing part; 110. Fastening boss; 120. Transition connection part; 130. Lower positioning groove; 140. Inner ring vent;

[0045] 2. Lower seat body; 21. Lower half of inner ring tube; 22. Lower half of outer ring tube; 23. Lower arc-shaped part; 231. Lower arc-shaped groove; 232. Lower inner wall; 24. Stop component; 25. Lower fixing ear; 26. Lower positioning protrusion; 27. Positioning protrusion;

[0046] 3. Upper seat; 31. Upper inner ring; 32. Upper outer ring; 33. Connecting bridge; 34. Connecting bridge; 35. Upper positioning groove;

[0047] 4. Inner ring guide component;

[0048] 5. Outer ring guide component;

[0049] 10. Inner ring ejection channel; 20. Outer ring ejection channel; 30. Connecting channel; 40. Inner ring premixing chamber; 50. Outer ring premixing chamber; 60. Outer ring ventilation chamber; 70. Inner wall of outer ring. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] Example 1

[0055] like Figures 1 to 3As shown, this embodiment provides a gas distribution seat 100, which can be applied in a burner to achieve gas distribution between the inner ring flame hole 301 and the outer ring flame hole 401 in the burner, and enhance the mixing uniformity of air and fuel flowing to the inner ring flame hole 301.

[0056] Specifically, the upper end of the gas distributor 100 has an inner ring premixing chamber 40 and an outer ring premixing chamber 50 arranged at intervals around the inner ring premixing chamber 40; the bottom of the gas distributor 100 is provided with an inner ring ejector channel 10 and an outer ring ejector channel 20, the air inlet end of the outer ring ejector channel 20 is used for the intake of gas and air, and the air outlet end of the outer ring ejector channel 20 is connected to the outer ring premixing chamber 50; on the horizontal projection plane, the inner ring ejector channel 10 spans the inner ring premixing chamber 40 from the air inlet end to the air outlet end, and the air inlet end of the inner ring ejector channel 10 is used for the intake of gas and air, and the air outlet end of the inner ring ejector channel 10 extends to the inner ring wall 70 near the outer ring premixing chamber 50. The gas distributor 100 is also provided with a connecting channel 30. The connecting channel 30 extends from the inner wall 70 of the outer ring to the inner ring premixing chamber 40. The air inlet of the connecting channel 30 is connected to the air outlet of the inner ring ejector channel 10, and the air outlet of the connecting channel 30 is connected to the inner ring premixing chamber 40. That is, the inner ring ejector channel 10 is connected to the inner ring premixing chamber 40 through the connecting channel 30.

[0057] The gas distributor 100 provided in this embodiment has an inner ring ejector channel 10 that spans the inner ring premixing cavity 40 from the inlet to the outlet on the horizontal projection plane. The inner ring ejector channel 10 is connected to the inner ring premixing cavity 40 via a connecting channel 30. This allows the outlet of the inner ring ejector channel 10 to be offset from the inner ring premixing cavity 40 on the horizontal plane. This increases the length of the inner ring ejector channel 10 while maintaining the overall outer diameter of the gas distributor 100, thereby enhancing its air ejection capability and improving the uniformity of air and fuel mixing within the inner ring ejector channel 10. Simultaneously, because the outlet of the inner ring ejector channel 10 extends to the outer ring premixing cavity 5... The outer ring inner wall 70 is connected to the inner ring premixing chamber 40. The connecting channel 30 extends from the outer ring inner wall 70 to the inner ring premixing chamber 40. This allows for a significant increase in the distance between the inner ring premixing chamber 40 and the outer ring premixing chamber 50, and also increases the length of the connecting channel 30, while maintaining the same distance between the inner ring ejector channel 10 and the outer ring premixing chamber 50 and avoiding communication between the inner ring ejector channel 10 and the outer ring premixing chamber 50. This effectively increases the overall length of the inner ring ejector channel 10 and the connecting channel 30, extends the flow path of the airflow from the air inlet of the inner ring ejector channel 10 to the inner ring premixing chamber 40, and effectively improves the mixing uniformity of air and fuel before flowing into the inner ring premixing chamber 40.

[0058] like Figure 3 and Figure 4As shown, in one embodiment, the cross-sectional area of ​​the outlet end of the inner ring ejector channel 10 is smaller than the cross-sectional area of ​​the inlet end of the connecting channel 30. This ensures that the mixed airflow does not experience flow obstruction or deceleration when flowing from the inner ring ejector channel 10 to the connecting channel 30, thereby facilitating the maintenance of the airflow rate and velocity of the mixed airflow towards the inner ring premixing chamber 40.

[0059] Furthermore, the cross-sectional area of ​​the connecting channel 30 is equal from the inlet end to the outlet end, or the cross-sectional area of ​​the connecting channel 30 tends to increase from the inlet end to the outlet end. This ensures the smooth flow of the mixed airflow within the connecting channel 30.

[0060] In one embodiment, the connecting channel 30 is located above the inner ring ejector channel 10, which facilitates the processing of the connecting channel 30 and reduces the processing difficulty and cost of the gas distributor 100. In other embodiments, the connecting channel 30 may also be located on one side of the inner ring ejector channel 10 along the circumference of the inner ring premixing cavity 40.

[0061] The inner wall 70 of the outer ring extends downward to the bottom of the outer ring premixing chamber 50. The bottom of the gas distribution seat 100 has an inner ring ejector tube. The inner ring ejector tube includes two inner ring half-pipes arranged opposite each other. The two inner ring half-pipes together form an inner ring ejector channel 10. One end of one inner ring half-pipe is connected to the inner wall 70 of the outer ring, and the corresponding end of the other inner ring half-pipe is spaced apart from the inner wall 70 of the outer ring to form an inner ring vent 140. The inner ring vent 140 connects the outlet end of the inner ring ejector channel 10 and the connecting channel 30.

[0062] Specifically, the ventilation area of ​​the inner ring vent 140 is larger than the ventilation area of ​​the outlet end of the inner ring ejector channel 10, so as to ensure the smooth flow of the mixed airflow from the inner ring ejector channel 10 through the inner ring vent 140.

[0063] In one embodiment, the upper part of the inner ring ejector tube wall forms the lower channel wall of the connecting channel 30 and the partial cavity bottom of the inner ring premixing cavity 40, thereby shortening the vertical distance between the connecting channel 30 and the inner ring ejector channel 10, improving structural compactness, and reducing the processing difficulty of the connecting channel 30.

[0064] like Figure 3 , Figure 4 and Figure 9 As shown, since the outer ring ejector channel 20 is located at the bottom of the gas distribution seat 100 and the outer ring premixing cavity 50 is located on the upper side of the gas distribution seat 100, the bottom of the outer ring premixing cavity 50 is provided with an outer ring vent 141, and the outlet end of the outer ring ejector channel 20 is connected to the outer ring premixing cavity 50 through the outer ring vent 141.

[0065] In one embodiment, an outer ring ventilation cavity 60 is provided inside the gas distributor 100. The outer ring ventilation cavity 60 is located below the outer ring premixing cavity 50 and is separated from the outer ring premixing cavity 50. The outer ring ventilation port 141 connects the outer ring ventilation cavity 60 and the outer ring premixing cavity 50. The outlet end of the outer ring ejector channel 20 is connected to the outer ring ventilation cavity 60, that is, the gas flowing out of the outer ring ejector channel 20 passes through the outer ring ventilation cavity 60 and then enters the outer ring premixing cavity 50. The outer ring ventilation cavity 60 enables a smooth transition of the premixed gas from the relatively lower outer ring ejector channel 20 to the relatively higher outer ring premixing cavity 50, ensuring the smooth flow of the premixed gas to the outer ring premixing cavity 50.

[0066] Furthermore, the inner wall 70 of the outer ring extends downward and forms the inner wall of the outer ring ventilation cavity 60. In the vertical direction, the outlet end of the inner ring ejector channel 10 is directly opposite the outer ring ventilation cavity 60. That is, the inner wall 70 of the outer ring not only forms the inner wall of the outer ring premixing cavity 50, but also forms the inner wall of the outer ring ventilation cavity 60, in order to simplify the structure and reduce the processing difficulty of the air distribution seat 100; while the outlet end of the inner ring ejector channel 10 is directly opposite the outer ring ventilation cavity 60, so as to ensure the consistency of the height position of the inner ring ejector channel 10 and the outer ring ejector channel 20.

[0067] The outer ring ejector channel 20 and the inner ring ejector channel 10 extend in the same direction, that is, the outer ring ejector channel 20 and the inner ring ejector channel 10 are parallel and spaced apart, in order to simplify the structure of the gas distribution seat 100, reduce the probability of interference between the inner ring ejector channel 10 and the outer ring ejector channel 20, and improve the convenience of docking the inner ring ejector channel 10 and the outer ring ejector channel 20 with the nozzle 202 on the burner head. Furthermore, the center line of the outer ring ejector channel 20 and the center line of the inner ring ejector channel 10 are located on the same horizontal plane.

[0068] like Figure 1 , Figure 3 and Figure 4 As shown, in one embodiment, there are two outer ring ejector channels 20. The two outer ring ejector channels 20 are located on opposite sides of the inner ring ejector channel 10, and the two outer ring ejector channels 20 are respectively connected to the two ends of the outer ring ventilation cavity 60. This allows the air and fuel gas mixture ejected by the two outer ring ejector channels 20 to enter the outer ring ventilation cavity 60 and flow to the outer ring premixing cavity 50 through the outer ring ventilation port 141.

[0069] To improve the uniformity of the mixed gas within the outer ring premixing chamber 50, in one embodiment, a partition 16 protrudes from the bottom of the outer ring premixing chamber 50. Outer ring vents 141 are provided on both sides of the partition 16 at the bottom of the outer ring premixing chamber 50. The outlets of the two outer ring ejector channels 20 are connected to the outer ring premixing chamber 50 through the two outer ring vents 141. An outer ring guide 5 is also provided within the outer ring premixing chamber 50, guiding the mixed gas entering the outer ring premixing chamber 50 from the outer ring vents 141 in a direction away from the partition 16.

[0070] By setting the outer ring guide 5, the premixed gas flowing into the outer ring premixing chamber 50 from the outer ring vent 141 can be guided to flow along the circumference of the outer ring premixing chamber 50. This avoids the mixed gas flowing out of the outer ring vent 141 flowing directly upward to the outer ring premixing chamber 50, thereby avoiding the problem of low concentration of mixed gas at the position of the outer ring premixing chamber 50 far from the outer ring vent 141. This improves the uniformity of the distribution of mixed gas in the outer ring premixing chamber 50, thereby ensuring the uniformity of the premixed gas flowing out of the outer ring burner hole 401 at all points and improving combustion stability.

[0071] In one embodiment, a stop member 24 protrudes upward from the bottom of the outer ring ventilation cavity 60. The stop member 24 abuts against the upper cavity wall of the outer ring ventilation cavity 60 and is positioned vertically opposite the partition 16. This divides the outer ring ventilation cavity 60 into two non-communicating ventilation cavities. The two outer ring ejector channels 20 are connected to the corresponding outer ring vents 141 through the two ventilation cavities, further improving the uniformity of the flow of premixed gas to both sides of the partition 16. At the same time, by setting the stop member 24 to separate the two ventilation cavities, it is possible to effectively prevent the two streams of gas flowing out of the two outer ring ejector channels 20 from colliding, which would cause airflow turbulence and noise, thus improving the airflow balance.

[0072] In one embodiment, the outer ring guide 5 includes an arc-shaped guide plate, which is adapted to the shape of the outer ring premixing cavity 50 and covers the outer ring premixing cavity 50, abutting against the upper side of the partition 16. On the horizontal projection plane, the outer ring guide 5 covers two outer ring vents 141, and the two ends of the outer ring guide 5 along the circumference of the air distribution seat 100 are spaced apart from adjacent outer ring vents 141. By configuring the outer ring guide 5 as an arc-shaped guide plate covering the outer ring vents 141, the installation of the outer ring guide 5 can be simplified, and the guiding effect of the outer ring guide 5 can be controlled by setting the length of the arc-shaped guide plate.

[0073] To better ensure the guiding effect of the outer ring guide 5, in one embodiment, the central angle between the end of the outer ring guide 5 and the dividing part 16 is 15° to 50°, so as to avoid the outer ring guide 5 extending too long, resulting in a small gas flow rate of the mixed gas in the outer ring premixing chamber 50 above the outer ring guide 5, and also to avoid the guiding effect being poor due to the outer ring guide 5 extending too short.

[0074] To improve the ease of assembly and disassembly of the outer ring guide member 5, a fastening boss 110 is provided on the bottom of the outer ring premixing cavity 50. One fastening boss 110 is provided on each of the opposite sides of the partition 16. The fastening boss 110 has a fastening threaded hole, and the outer ring guide member 5 has a fastening through hole. The fastening through hole and the fastening threaded hole are arranged in a one-to-one correspondence. The outer ring guide member 5 and the fastening boss 110 are connected by fasteners passing through the fastening through hole and the fastening threaded hole. In other embodiments, the outer ring guide member 5 can also be snapped onto the cavity wall of the outer ring premixing cavity 50 or connected using other connection methods.

[0075] Furthermore, the two outer ring ejector channels 20 are symmetrically arranged relative to the inner ring ejector channel 10, and the partition 16 and the stop component 24 are both directly opposite the air outlet of the inner ring ejector channel 10.

[0076] In one embodiment, the gas distributor 100 further includes an inner ring guide 4, which is installed inside the inner ring premixing chamber 40 and has an inner ring guide hole that extends vertically. Thus, the mixed gas entering the inner ring premixing chamber 40 flows out through the inner ring guide hole on the inner ring guide 4, thereby controlling the outflow path, direction, and velocity of the mixed gas exiting the inner ring premixing chamber 40.

[0077] In one embodiment, the inner ring guide 4 is an annular structure, and its outer diameter is equal to the outer diameter of the inner ring premixing cavity 40. The inner hole of the annular structure forms an inner ring guide hole, thereby simplifying the structure of the inner ring guide 4 and reducing its processing difficulty. In other embodiments, the inner ring guide 4 may also be a plate-like structure, and multiple inner ring guide holes may be distributed on the inner ring guide 4.

[0078] In one embodiment, the inner ring guide 4 is integrally die-cast into the cavity wall of the inner ring premixing cavity 40 to ensure the stability of the inner ring guide 4 in the inner ring premixing cavity 40.

[0079] In other embodiments, the inner ring premixing cavity 40 has a mounting protrusion on its cavity wall, and the inner ring guide 4 is supported on the mounting protrusion and connected to the mounting protrusion by fasteners, which may be, but are not limited to, rivets or screws.

[0080] like Figure 3 and Figure 5As shown, to reduce the processing difficulty of the gas distributor 100, the gas distributor 100 includes a lower body 2, a middle body 1, and an upper body 3, which are separately configured. The lower body 2 is detachably installed on the lower side of the middle body 1, and the lower body 2 and the middle body 1 together form an inner ring ejector channel 10 and an outer ring ejector channel 20; the upper body 3 is detachably installed on the upper side of the middle body 1, and the upper body 3 and the middle body 1 together form an inner ring premixing cavity 40, a connecting channel 30, and an outer ring premixing cavity 50. This simplifies the processing of each part of the gas distributor 100, reduces processing difficulty and processing cost, and facilitates the mass production of the gas distributor 100. At the same time, this configuration, compared with the conventional configuration of dividing the gas distributor into two parts, is more conducive to the processing and forming of the connecting channel 30.

[0081] like Figure 3 and Figures 6-8 As shown, the lower seat 2 includes a lower arc-shaped portion 23, which has an upward-opening lower arc-shaped groove 231. The outer side of the inner ring groove wall of the lower arc-shaped groove 231 is connected to an inner ring lower half-tube portion 21 and an outer ring lower half-tube portion 22. The bottom of the intermediate seat 1 has an upper arc-shaped portion 13, an inner ring upper half-tube portion 11, and an outer ring upper half-tube portion 12. The upper arc-shaped portion 13 has an upward-opening upper arc-shaped groove 131. The outer ring upper half-tube portion 12 is connected to the outer side of the inner ring groove wall of the upper arc-shaped groove 131. The inner ring upper half-tube portion 11 and the inner ring groove wall of the upper arc-shaped groove 131 are spaced apart to form an inner ring vent 140. The upper arc-shaped portion 13 and the lower arc-shaped portion 23 are interlocked and connected to form an outer ring ventilation cavity 60. The upper half of the outer ring tube 12 and the lower half of the outer ring tube 22 are interlocked and connected to form an outer ring ejection channel 20. The upper half of the inner ring tube 11 and the lower half of the inner ring tube 21 are interlocked and connected to form an inner ring ejection channel 10. The above-mentioned matching structure between the lower seat body 2 and the intermediate seat body 1 and the lower seat body 2 simplifies the structure of the lower seat body 2 and reduces the processing difficulty of the lower seat body 2. The inner wall 70 of the outer ring includes the outer ring groove wall of the lower arc-shaped groove 231 and the outer ring groove wall of the upper arc-shaped groove 131.

[0082] Specifically, the lower arc-shaped portion 23 includes a lower inner wall 232 and a lower outer wall spaced apart. A bottom plate is connected between the lower ends of the lower inner wall 232 and the lower outer wall. The lower inner wall 232 forms the inner ring groove wall of the lower arc-shaped groove 231. The two ends of the lower half-pipe portion 22 of the outer ring are open, and the bottom plate, the lower inner wall 232, and the lower outer wall are all connected to the outlet end sidewall of the lower half-pipe portion 22 of the outer ring. The outlet end of the lower half-pipe portion 21 of the inner ring is connected to the lower inner wall 232, and the lower inner wall 232 extends downward from the bottom plate portion at the connection point of the lower half-pipe portion 21 of the inner ring to ensure the radius of the inner ring semi-ejector tube.

[0083] Furthermore, the shape of the upper arc-shaped portion 13 is adapted to the shape of the lower arc-shaped portion 23. The concave wall surface of the upper arc-shaped portion 13 forms a middle inner wall 132. The outer diameter and inner diameter of the middle inner wall 132 are equal to the outer diameter and inner diameter of the lower inner wall 232, respectively. The middle inner wall 132 forms the inner ring groove wall of the upper arc-shaped groove 131. The outer ring inner wall 70 includes the lower inner wall 232 and the middle inner wall 132.

[0084] Furthermore, the upper end of the lower seat 2 has a first mating surface, and the bottom of the middle seat 1 has a second mating surface. The first mating surface and the second mating surface fit together. Preferably, the center lines of the inner ring ejector channel 10 and the outer ring ejector channel 20 are located at the overlapping position of the first mating surface and the second mating surface, that is, the inner ring ejector tube and the outer ring ejector tube are separated in half to improve the processing convenience of the lower seat 2 and the middle seat 1.

[0085] To improve the assembly accuracy of the lower seat 2 and the intermediate seat 1, one of the first and second assembly surfaces is provided with a lower positioning protrusion 26, and the other is provided with a lower positioning groove 130. The lower positioning protrusion 26 is inserted into the lower positioning groove 130 to achieve the installation positioning of the two, ensuring the tightness and reliability of the lower seat 2 and the intermediate seat 1 after assembly. In one embodiment, the lower positioning protrusion 26 protrudes from the first assembly surface, and the lower positioning groove 130 is provided on the second assembly surface. In other embodiments, the lower positioning protrusion 26 protrudes downward from the second assembly surface, and the lower positioning groove 130 is provided on the first assembly surface.

[0086] Preferably, the lower positioning protrusion 26 is arranged around the periphery of the inner ring ejector channel 10, the outer ring ejector channel 20 and the lower arc groove 231 to better ensure the sealing of the inner ring ejector channel 10, the outer ring ejector channel 20 and the outer ring venting cavity 60 after the lower seat body 2 and the middle seat body 1 are fastened together.

[0087] Furthermore, a sealant is provided between the first mating surface and the second mating surface. The sealant is coated around the lower positioning protrusion 26 to ensure that after the lower positioning protrusion 26 is inserted into the lower positioning groove 130, the sealant between the first mating surface and the second mating surface can surround the inner ring ejection channel 10, the outer ring ejection channel 20 and the outer ring ventilation cavity 60, ensuring the sealing of the cavity formed by the lower seat body 2 and the intermediate seat body 1 after they are connected.

[0088] To improve the tightness of the connection between the lower seat 2 and the middle seat 1, the lower seat 2 is provided with multiple lower fixing ears 25, and the middle seat 1 is provided with multiple lower fixing parts 19. Multiple lower fixing ears 25 are provided at intervals along the periphery of the lower seat 2, and the lower fixing parts 19 are provided in a one-to-one correspondence with the lower fixing ears 25. The lower seat 2 and the middle seat 1 are connected by lower fasteners passing through the lower fixing ears 25 and the lower fixing parts 19.

[0089] Specifically, at least two lower fixing ears 25 are provided on both sides of the lower half of the inner ring tube 21 and on both sides of the lower half of the outer ring tube 22. At least two lower fixing ears 25 are provided on each side at intervals along the extension direction of the corresponding half tube, and each lower fixing ear 25 is positioned to connect with the lower arc-shaped portion 23. Furthermore, the bottom of the lower arc-shaped groove 231 also has a protruding lower fixing ear 25, located at the middle position along the arc length of the lower arc-shaped groove 231. The upper arc-shaped groove 131 also has a lower fixing portion 19 to ensure a tight connection between the upper arc-shaped portion 13 and the lower arc-shaped portion 23.

[0090] like Figure 3 and Figures 9 to 11 As shown, the intermediate seat 1 includes an intermediate plate portion 14, a lower arc-shaped portion 23, and an outer ring half-pipe portion protruding from the lower side of the intermediate plate portion 14. The center of the intermediate plate portion 14 has a circular central clearance area, and an extended clearance area is provided on one side of the central clearance area. The air inlet end of the inner ring upper half-pipe portion 11 protrudes from the bottom of the intermediate plate portion 14. The inner ring upper half-pipe portion 11 extends radially to cross the central clearance area and extends into the extended clearance area, and is connected to the opposite side walls of the extended clearance area. The inner ring upper half-pipe portion 11 and the side wall of the extended clearance area away from the central clearance area are spaced apart to form an inner ring communication port. The inner ring side wall of the central clearance area and the upper side wall of the inner ring upper half-pipe portion 11 are smoothly connected by a transition connection portion 120, so that the transition connection portion 120, the inner ring upper half-pipe portion 11, and the side wall of the central clearance area together form an upper-opening central groove, and the inner ring upper half-pipe portion 11 and the side wall of the extended clearance area together form an upper-opening vent groove.

[0091] In one embodiment, the intermediate seat 1 further includes an outer ring portion 15 surrounding the outer periphery of the intermediate plate portion 14. The upper seat 3 includes an upper inner ring portion 31 and an upper outer ring portion 32 coaxially connected. The upper inner ring portion 31 and the intermediate seat 1 together form an inner ring premixing cavity 40. The upper outer ring portion 32 is coaxially and spaced apart inside the outer ring portion 15. The outer ring portion 15, the upper outer ring portion 32, and the intermediate plate portion 14 together form an outer ring premixing cavity 50. The inner wall 70 of the outer ring includes the upper outer ring portion 32. By using the intermediate seat 1 and the upper seat 3 to form the inner ring premixing cavity 40 and the outer ring premixing cavity 50, the structure of the upper seat 3 and the intermediate seat 1 can be simplified, and the processing difficulty can be reduced. Specifically, the inner diameter of the upper inner ring portion 31 is the same as the diameter of the intermediate clearance area and is coaxially arranged, that is, the groove wall of the central groove forms the cavity bottom and part of the cavity sidewall of the inner ring premixing cavity 40.

[0092] The upper seat 3 also includes a connecting bridge 33 between the upper inner ring 31 and the upper outer ring 32, which, together with the intermediate seat 1, forms a connecting channel 30. Specifically, the connecting bridge 33 covers the upper side of the venting groove and, together with the groove wall of the venting groove, forms the connecting channel 30. Furthermore, a connecting bridge 34 connects the upper inner ring 31 and the lower outer ring, with multiple connecting bridges 34 spaced circumferentially along the upper inner ring 31 to ensure the overall structural strength and rigidity of the upper seat 3. The connecting bridges 34 are detachably connected to the intermediate seat 1 to improve the ease of connection between the upper seat 3 and the intermediate seat 1.

[0093] The upper side of the intermediate seat 1 has a third mating surface, and the lower side of the upper seat 3 has a fourth mating surface, which fits against the third mating surface. One of the third and fourth mating surfaces has a protruding upper positioning protrusion 17, and the other has an upper positioning groove 35. The upper positioning protrusion 17 is inserted into the upper positioning groove 35 to achieve assembly positioning of the intermediate seat 1 and the upper seat 3, ensuring assembly accuracy. In one embodiment, the upper positioning protrusion 17 protrudes from the third mating surface, and the upper positioning groove 35 is formed on the fourth mating surface. In other embodiments, the upper positioning protrusion 17 may protrude from the fourth mating surface, while the upper positioning groove 35 may be formed on the third mating surface.

[0094] The upper positioning groove 35 is arranged around the periphery of the upper inner ring 31, the upper outer ring 32, and the connecting bridge 33. The shape of the upper positioning protrusion 17 is adapted to the shape of the upper positioning groove 35, thereby ensuring the shape accuracy and sealing of the outer ring premixing cavity 50, the inner ring premixing cavity 40, and the connecting channel 30 after the upper seat 3 and the intermediate seat 1 are engaged. Furthermore, a sealant is provided between the third mating surface and the fourth mating surface, and the sealant is arranged around the upper positioning groove 35 to ensure the sealing of the outer ring premixing cavity 50, the inner premixing cavity, and the connecting channel 30 at the connection between the upper seat 3 and the intermediate seat 1.

[0095] In one embodiment, the middle plate portion 14 is provided with an upper fixing portion 18. Multiple upper fixing portions 18 are provided at intervals around the periphery of the middle clearance area and the inner periphery of the outer ring premixing cavity 50. The multiple upper fixing portions 18 are respectively arranged opposite to the connecting bridge portion 33 and the connecting bridge portion 34. The connecting bridge portion 33 and each connecting bridge portion 34 are respectively provided with connecting through holes. The upper fixing portion 18 is provided with connecting threaded holes. The upper seat body 3 and the middle seat body 1 are fastened by upper fasteners passing through the connecting through holes and the upper fixing portions 18.

[0096] The present invention also provides a gas stove, including the burner described above. The gas stove provided by the present invention, by employing the aforementioned burner, can improve the combustion stability and reliability of the gas stove, reduce harmful substances generated during the use of the gas stove, and improve the efficiency of the gas stove.

[0097] Example 2

[0098] This embodiment provides a burner that can be applied to a gas stove to achieve gas ignition and combustion, while enhancing combustion stability and reliability.

[0099] like Figures 12 to 15 As shown, the burner includes a burner head assembly 200, a gas distribution seat 100, and a burner cap assembly arranged sequentially from bottom to top. The burner head assembly 200 includes a burner head seat 201 and multiple nozzles 202 mounted on the burner head seat 201. The gas distribution seat 100 is any of the aforementioned gas distribution seats, mounted on the burner head seat 201, with the multiple nozzles 202 respectively positioned directly opposite the air inlet ends of the inner ring ejector channel 10 and the outer ring ejector channel 20. The burner cap assembly includes an inner ring burner cap 300 and an outer ring burner cap 400 spaced out from the inner ring burner cap 300. The inner ring burner cap 300 has inner ring flame holes 301, and the outer ring burner cap 400 has outer ring flame holes 401 arranged circumferentially. The inner ring premixing chamber 40 of the gas distribution seat 100 communicates with the inner ring flame holes 301, and the outer ring premixing chamber 50 communicates with the outer ring flame holes 401.

[0100] The burner provided in this embodiment, by adopting the above-mentioned gas distribution seat 100, can extend the air intake path of the air-fuel mixture into the inner ring premixing chamber 40, enhance the ejection capability of the inner ring ejector channel 10, and improve the mixing uniformity of air and fuel in the inner ring ejector channel 10, thereby improving the combustion stability and combustion reliability of the burner.

[0101] Furthermore, to improve the installation accuracy of the gas distribution seat 100 on the burner head seat 201, the lower sides of the two outer ring ejector tubes are provided with downward protruding positioning protrusions 27, and the upper end of the burner head seat 201 is provided with a positioning slot 2031. The positioning protrusions 27 are inserted into the positioning slot 2031 to realize the installation positioning of the gas distribution seat 100 on the burner head seat 201, and avoid the problem that the nozzle 202 and the corresponding ejector tube cannot be completely aligned due to the gas distribution seat 100 being installed at an angle relative to the burner head seat 201.

[0102] In one embodiment, the upper end of the burner seat 201 has a plate-shaped support plate, and the upper end of the support plate is provided with a positioning protrusion ring 203. The inner wall of the positioning protrusion ring 203 is surrounded to form a positioning slot 2031, thereby avoiding the problem of reduced structural strength caused by slotting on the support plate.

[0103] It is worth noting that the installation structure of the burner assembly 200, the burner cap assembly, and the gas distribution seat 100 on the burner assembly 200 and the installation structure of the burner cap assembly on the gas distribution seat 100 can be set with reference to the prior art. This is not the focus of this invention, and this invention does not limit or elaborate on it.

[0104] The present invention also provides a gas stove, including the burner described above. The gas stove provided by the present invention, by employing the aforementioned burner, can improve the combustion stability and reliability of the gas stove, reduce harmful substances generated during the use of the gas stove, and improve the efficiency of the gas stove.

[0105] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0106] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A gas distributor, wherein the upper end of the gas distributor has an inner ring premixing cavity (40) and an outer ring premixing cavity (50) spaced around the inner ring premixing cavity (40), and the bottom of the gas distributor has an inner ring ejector channel (10) and an outer ring ejector channel (20), the outlet end of the outer ring ejector channel (20) communicating with the outer ring premixing cavity (50), characterized in that, On the horizontal projection plane, the inner ring ejector channel (10) spans the inner ring premixing cavity (40) from the air inlet to the air outlet, and the air outlet of the inner ring ejector channel (10) extends to the inner wall (70) of the outer ring near the outer ring premixing cavity (50). The gas distribution seat is provided with a connecting channel (30), which extends from the inner wall (70) of the outer ring to the inner ring premixing chamber (40). The air inlet of the connecting channel (30) is connected to the air outlet of the inner ring ejector channel (10), and the air outlet of the connecting channel (30) is connected to the inner ring premixing chamber (40).

2. The gas distribution seat according to claim 1, characterized in that, The cross-sectional area of ​​the air outlet of the inner ring ejector channel (10) is smaller than the cross-sectional area of ​​the air inlet of the connecting channel (30).

3. The gas distribution seat according to claim 1, characterized in that, The connecting channel (30) is located on the upper side of the inner ring ejection channel (10).

4. The gas distributor according to claim 3, characterized in that, The bottom of the gas distribution seat has an inner ring ejector tube, the inner cavity of the inner ring ejector tube forms the inner ring ejector channel (10), part of the tube wall of the inner ring ejector tube forms the lower channel wall of the connecting channel (30), the outlet end of the inner ring ejector tube is spaced apart from the inner wall (70) of the outer ring to form an inner ring vent (140), the inner ring vent (140) connects the inner ring ejector channel (10) and the inner ring vent (140) of the connecting channel (30), and the ventilation area of ​​the inner ring vent (140) is greater than or equal to the ventilation cross-sectional area of ​​the outlet end of the inner ring ejector channel (10).

5. The gas distribution seat according to any one of claims 1-4, characterized in that, The gas distribution seat includes a lower seat (2), a middle seat (1) and an upper seat (3). The lower seat (2) is detachably installed on the lower side of the middle seat (1) and together with the middle seat (1) forms the outer ring ejection channel (20) and the inner ring ejection channel (10). The upper seat (3) is detachably installed on the upper side of the middle seat (1), and the upper seat (3) and the middle seat (1) together form the outer ring premixing cavity (50), the inner ring premixing cavity (40) and the connecting channel (30).

6. The gas distributor according to claim 5, characterized in that, The lower seat (2) has a lower arc-shaped part (23), the lower arc-shaped part (23) has an upper-opening lower arc-shaped groove (231), and the outer side of the inner ring groove wall of the lower arc-shaped groove (231) is connected to an inner ring lower half tube part (21) and an outer ring lower half tube part (22). The bottom of the intermediate seat (1) has an upper arc-shaped part (13), an inner ring upper half tube part (11) and an outer ring upper half tube part (12). The upper arc-shaped part (13) has an upper arc-shaped groove (131) with the opening facing downward. The outer ring upper half tube part (12) is connected to the outer side of the inner ring groove wall of the upper arc-shaped groove (131). The inner ring upper half tube part (11) and the inner ring groove wall of the upper arc-shaped groove (131) are spaced apart to form an inner ring vent (140). The lower arc-shaped part (23) is fastened to the upper arc-shaped part (13) and surrounds it to form an outer ring ventilation cavity (60). The outer ring ventilation cavity (60) is connected to the outer ring premixing cavity (50). The inner wall of the outer ring (70) includes the outer ring groove wall of the lower arc-shaped groove (231) and the outer ring groove wall of the upper arc-shaped groove (131). The upper half of the outer ring (12) and the lower half of the outer ring (22) are connected by snapping together to form the outer ring ejection channel (20). The outer ring ejection channel (20) is connected to the outer ring ventilation cavity (60). The upper half of the inner ring (11) and the lower half of the inner ring (21) are connected by snapping together to form the inner ring ejection channel (10). The inner ring ventilation port (140) is connected to the inner ring ejection channel (10) and the connecting channel (30).

7. The gas distributor according to claim 6, characterized in that, The intermediate seat (1) includes an intermediate plate (14) and an intermediate outer ring (15) surrounding the outer periphery of the intermediate plate (14). The upper seat (3) includes an upper inner ring (31) and an upper outer ring (32) spaced apart. The upper inner ring (31) and the intermediate seat (1) together form the inner ring premixing cavity (40). The upper outer ring portion (32) is spaced apart and disposed inside the middle outer ring portion (15). The upper outer ring portion (32), the middle outer ring portion (15) and the middle plate portion (14) together form the outer ring premixing cavity (50). The inner wall (70) of the outer ring includes the upper outer ring portion (32). The upper seat (3) also includes a connecting bridge (33) connecting the upper inner ring (31) and the upper outer ring (32), and the connecting bridge (33) and the intermediate seat (1) together form the connecting channel (30).

8. The gas distribution seat according to any one of claims 1-4, characterized in that, The gas distribution seat also includes an annular inner ring guide (4), which is installed in the inner ring premixing cavity (40), and the outer wall of the inner ring guide (4) is in contact with the circumferential cavity wall of the inner ring premixing cavity (40).

9. The gas distribution seat according to claim 8, characterized in that, The inner ring guide (4) is die-cast into the inner ring premixing cavity (40).

10. A burner, characterized in that, Includes the gas distribution seat as described in any one of claims 1-9.

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