Burner, burner and gas stove

Abstract

The utility model belongs to the technical field of combustion, and discloses a furnace end, a combustor and a gas stove. The furnace end comprises a furnace base and an injection pipe. The furnace base is provided with a central gas cavity and a plurality of premixing cavities sequentially arranged in the circumferential direction of the central gas cavity at intervals. The air outlet end of the center injection pipe communicates with the center air cavity, the multiple outer ring injection pipes and the multiple premixing cavities are arranged in a one-to-one correspondence mode and communicate with each other independently, at least one outer ring injection pipe and the center injection pipe extend in the same direction, and an included angle is formed between the extension direction of the other outer ring injection pipes and the extension direction of the center injection pipe. The combustor comprises a furnace end, a gas distribution seat and a fire cover assembly. The gas distribution seat is provided with a plurality of gas distribution cavities communicating with the premixing cavities in a one-to-one correspondence mode. The fire cover assembly comprises a plurality of ventilation cavities which are arranged from inside to outside in a separated mode, the center gas cavity communicates with the ventilation cavity located on the innermost side, and the other ventilation cavities correspond to the gas distribution cavities one to one and communicate with the gas distribution cavities. According to the utility model, multi-ring fire combustion can be met, the structures of the furnace end and the combustor are simplified, and the cost of the furnace end and the combustor is reduced.

Description

Technical Field

[0001] This utility model relates to the field of combustion technology, and in particular to a burner head, burner and gas stove. Background Technology

[0002] A gas stove is a common kitchen appliance that heats cooking utensils by burning combustible gas to meet cooking needs. It usually has two burners spaced apart, one on the left and one on the right, with a burner installed at each burner to ignite and burn the gas.

[0003] To increase the firepower adjustment range of the burner, a multi-ring burner is provided in the prior art, which includes a burner head, a gas distribution seat, and a burner cap assembly arranged sequentially from bottom to top. The burner cap assembly has a central burner cap, an inner ring burner cap, and an outer ring burner cap arranged sequentially from the inside to the outside. Each burner cap is provided with a ventilation chamber and a flame hole communicating with the ventilation chamber. The gas distribution seat is provided with three gas distribution chambers arranged sequentially from the inside to the outside, and the three gas distribution chambers are respectively connected to the ventilation chambers of the three burner caps. The burner head is provided with an L-shaped central through hole, an inner ring premixing chamber arranged around the central through hole, and an outer ring premixing chamber arranged around the inner ring premixing chamber. The inner ring premixing chamber, the outer ring premixing chamber, and the central through hole are all provided with corresponding ejector tubes, and the three ejector tubes are arranged side by side. The inner ring premixing chamber is connected to the inner ring mixing hole through the gas distribution chamber, and the outer ring premixing chamber is connected to the outer ring ventilation chamber through the gas distribution chamber.

[0004] While existing multi-ring burners can increase the range of heat adjustment, the premixing chambers on the burner head are arranged sequentially from the inside out, and the ejector tubes are arranged side by side. This results in a significant increase in burner head size when the multi-ring burner structure is extended to burners with more rings. An excessively large burner head will affect the heating efficiency of ordinary cookware. At the same time, since the inner ring premixing chamber surrounds the outer ring premixing chamber, the communication structure between the ejector tubes corresponding to the outer ring premixing chamber is relatively complex, resulting in a complex burner head structure and making burner head manufacturing difficult. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a burner head that can effectively solve the problems of complex structure and difficult processing of existing burner heads used in multi-ring burners.

[0006] The second technical problem solved by this utility model is to provide a burner that can effectively solve the problems of complex structure and high processing cost of existing multi-ring burners.

[0007] The third technical problem to be solved by this utility model is to provide a gas stove that can effectively solve the problem of complex structure and high processing cost of existing multi-ring combustion gas stoves due to the complex burner structure and high processing cost.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A stove head, comprising:

[0010] The furnace base has a vertically arranged central gas chamber and a plurality of premixing chambers arranged sequentially along the circumference of the central gas chamber;

[0011] The ejector tube includes a central ejector tube and multiple outer ring ejector tubes. The outlet end of the central ejector tube is connected to the central air chamber. The multiple outer ring ejector tubes are arranged one-to-one with the multiple premixing chambers and are individually connected. At least one of the outer ring ejector tubes extends in the same direction as the central ejector tube, and the extension directions of the remaining outer ring ejector tubes are arranged at an angle to the extension direction of the central ejector tube.

[0012] Compared with the prior art, the burner head of this utility model has the following advantages: When applied in a burner, the central gas chamber of this utility model can supply gas to the innermost gas chamber, and the premixing chamber can supply gas to the remaining gas chambers, thereby simultaneously meeting the gas supply needs of the burner cap assembly with multiple gas chambers and achieving multi-ring combustion; since multiple premixing chambers are arranged sequentially along the circumference of the central gas chamber, the arrangement of premixing chambers along the circumference of the burner head effectively simplifies the structure of the burner head and reduces the processing cost; furthermore, at least one of the outer ring ejector tubes and The central ejector tube extends in the same direction, while the extension directions of the remaining outer ring ejector tubes are set at an angle to the extension direction of the central ejector tube. This ensures that the burner head size is compatible with most cookware, allowing multiple ejector channels to be set on the burner head. At the same time, it avoids the problem of large radial size requirements for the burner head caused by all ejector channels being set side by side. It also facilitates the circumferential arrangement of the outer ring ejector tubes and the corresponding premixing chambers on the burner base, thereby simplifying the communication structure between the inner cavity of the ejector tube and the premixing chamber, further simplifying the structure of the burner head and reducing the processing cost of the burner head.

[0013] In one embodiment, at least one of the premixing cavities has an expansion portion formed radially outward on its upper outer side wall, the expansion portion having an expansion cavity communicating with the corresponding premixing cavity.

[0014] In one embodiment, three premixing chambers are arranged around the central air chamber, wherein the upper outer walls of two of the premixing chambers are radially expanded to form expansion portions, and one expansion portion protrudes radially outward relative to the other expansion portion along the central air chamber.

[0015] And / or, the outer side of the expansion portion is connected to a mounting protrusion, and the mounting protrusion is provided with a first mounting hole for mounting a first ignition needle.

[0016] In one embodiment, both the premixing chamber and the expansion chamber are open at the top, and the furnace head also includes a cover that covers the upper end of the furnace base and closes all the upper openings of the premixing chamber and the expansion chamber.

[0017] Each of the premixing chambers is provided with a vent hole in the cover, and the vent hole corresponding to the premixing chamber with the expansion section is located above the expansion chamber. The distance between the multiple vent holes and the center line of the central air chamber is different.

[0018] In one embodiment, the cover includes a cover plate portion and a central sleeve portion protruding from the upper side of the cover plate portion, the inner cavity of the central sleeve portion is coaxially connected with the central air cavity, and the cover plate portion covers the upper end of the furnace base and has the vent hole.

[0019] And / or, the cover includes a cover plate portion and a first positioning protrusion ring protruding from the cover plate portion, the first positioning protrusion ring being provided in a one-to-one correspondence with the vent hole, and the vent hole vertically penetrating the first positioning protrusion ring;

[0020] And / or, the cross-sectional area of ​​the plurality of vents gradually increases along the direction away from the central air cavity.

[0021] In one embodiment, the furnace base includes a main body and a central tube having the central gas cavity. The main body has an open, fan-shaped cavity, which is divided into a plurality of premixing chambers by a partition structure. The axis of the cavity is collinear with the axis of the central tube.

[0022] The outer ring ejector tube is connected to the main body. The furnace base also includes a horizontal tube section. One end of the horizontal tube section is connected to the lower end of the central tube section, and the other end of the horizontal tube section extends radially outward from the main body and is connected to the central ejector tube.

[0023] In one embodiment, the partition structure includes at least two partition plates, all of which are circumferentially spaced along the central tube and each of the partition plates extends radially along the central tube. The premixing cavity is formed between two adjacent partition plates and between the circumferential end wall of the cavity and the adjacent partition plate.

[0024] In one embodiment, the main body has two side end plates that are circumferentially opposite to each other and arranged at an angle. The two side end plates are connected to the central tube and extend radially along the central tube. A mounting plate is connected between the upper ends of the two side end plates. The mounting plate has a second mounting hole for mounting a second ignition needle near the central tube.

[0025] The second technical problem mentioned above is solved by the following technical solution:

[0026] A burner, comprising:

[0027] The stove head as described above;

[0028] A gas distribution seat is installed at the upper end of the burner head. The gas distribution seat has multiple gas distribution chambers, and the gas distribution chambers are arranged in a one-to-one correspondence with the premixing chamber and are connected to each other.

[0029] The flame cap assembly is installed on the upper side of the gas distribution seat, and the flame cap assembly includes a plurality of ventilation chambers arranged sequentially from the inside to the outside. The central ventilation chamber is connected to the innermost ventilation chamber, and the remaining ventilation chambers are arranged and connected to the gas distribution chambers one by one.

[0030] Compared with the prior art, the burner described in this utility model has the following advantages: by adopting the above-mentioned burner head, multi-ring combustion can be achieved, while simplifying the structure of the burner and reducing the processing cost of the burner.

[0031] The third technical problem mentioned above is solved by the following technical solution:

[0032] A gas stove, including the burner described above.

[0033] Compared with the prior art, the gas stove of this utility model has the following advantages: by adopting the above-mentioned burner, multi-ring flame combustion can be achieved, while simplifying the structure of the gas stove and reducing the processing cost of the gas stove. Attached Figure Description

[0034] Figure 1 A schematic diagram of the burner provided in an embodiment of this utility model;

[0035] Figure 2 A cross-sectional view of the burner provided in an embodiment of this utility model;

[0036] Figure 3 A schematic diagram of the structure of the burner head provided in an embodiment of this utility model;

[0037] Figure 4 This is a schematic diagram of the disassembled structure of the burner head provided in an embodiment of the present utility model;

[0038] Figure 5 A schematic diagram of the structure of the burner head after the cover is removed, as provided in an embodiment of this utility model, from a certain perspective.

[0039] Figure 6 A schematic diagram of the structure of the burner head after the cover is removed, as provided in an embodiment of this utility model, from another perspective.

[0040] Figure 7 A cross-sectional view of the burner provided in an embodiment of this utility model from another section;

[0041] Figure 8 for Figure 7 A magnified view of a section at point I.

[0042] Label Explanation:

[0043] 100. Burner head; 200. Burner cap assembly; 201. Center burner cap; 2011. Center vent chamber; 2012. Center burner hole; 202. First annular burner cap; 2021. First vent chamber; 2022. First burner hole; 203. Second annular burner cap; 2031. Second vent chamber; 2032. Second burner hole; 2033. Third vent chamber; 2034. Third burner hole; 300. Gas distribution seat; 301. Main seat; 3011. First gas distribution chamber; 3012. Second gas distribution chamber; 3013. Third gas distribution chamber; 3014. Air inlet; 302. Second positioning protrusion ring; 303. Positioning slot; 400. Flow equalization plate; 500. First ignition needle; 600. Second ignition needle; 700. First thermocouple; 800. Second thermocouple;

[0044] 1. Furnace base; 11. Main body; 111. Premixing chamber; 111a. First premixing chamber; 111b. Second premixing chamber; 111c. Third premixing chamber; 112. Side end plate; 12. Central tube section; 121. Central gas chamber; 13. Separation structure; 14. Horizontal tube section; 141. Horizontal channel; 15. First expansion section; 151. First expansion chamber; 16. Second expansion section; 161. Second expansion chamber; 17. Mounting plate; 18. Mounting protrusion; 19. Fixing ear; 110. Positioning protrusion; 120. Connecting pipe section; 130. Support leg section;

[0045] 2. Ejector tube; 2a. Central ejector tube; 2a1. Central ejector channel; 2b. First ejector tube; 2b1. First ejector channel; 2c. Second ejector tube; 2c1. Second ejector channel; 2d. Third ejector tube; 2d1. Third ejector channel;

[0046] 3. Cover body; 31. Cover plate part; 311. Cover plate ear part; 32. First positioning protrusion ring; 33. Central sleeve part; 331. Central hole; 34. Vent hole; 34a. First vent hole; 34b. Second vent hole; 34c. Third vent hole. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] This embodiment provides a burner head and a burner including the burner head to meet the gas supply requirements of a multi-ring burner head, and can simplify the structure of the burner head and reduce the processing difficulty of the burner head.

[0052] In this embodiment, as Figure 1 , Figure 2 and Figure 4As shown, the burner head 100 includes a furnace base 1 and an ejector tube 2. The furnace base 1 has a vertically arranged central gas chamber 121 and a plurality of premixing chambers 111 arranged sequentially along the circumference of the central gas chamber 121. The ejector tube 2 includes a central ejector tube 2a and a plurality of outer ring ejector tubes. The gas outlet end of the central ejector tube 2a is connected to the central gas chamber 121. The plurality of outer ring ejector tubes are arranged one-to-one with the plurality of premixing chambers 111 and are individually connected. At least one outer ring ejector tube extends in the same direction as the central ejector tube 2a, and the extension direction of the remaining outer ring ejector tubes is at an angle to the extension direction of the central ejector tube 2a.

[0053] The burner includes a gas distribution seat 300 and a flame cap assembly 200 disposed on the upper side of the gas distribution seat 300. The gas distribution seat 300 is installed on the upper side of the burner head 100. The gas distribution seat 300 has at least a plurality of gas distribution chambers arranged at intervals from the inside to the outside, and the plurality of gas distribution chambers are arranged and connected to a plurality of premixing chambers 111. The flame cap assembly 200 has a plurality of ventilation chambers arranged coaxially from the inside to the outside, and each ventilation chamber is provided with at least one ring of flame holes that communicate with it. The central gas chamber 121 communicates with the innermost ventilation chamber, and the remaining ventilation chambers are arranged and connected to the gas distribution chambers.

[0054] That is, the mixture of gas and air ejected by the ejector channel is initially mixed in the corresponding premixing chamber 111 or central gas chamber 121. Then, the mixed gas in the central gas chamber 121 is supplied to the innermost ventilation chamber, and the premixed gas in the other premixing chambers 111 is supplied to the corresponding ventilation chamber through the corresponding gas distribution chamber.

[0055] The burner head 100 provided in this embodiment, when applied in a burner, allows the central gas chamber 121 to supply gas to the innermost ventilation chamber, and the premixing chamber 111 to supply gas to the remaining ventilation chambers, thereby simultaneously satisfying the gas supply to the burner cap assembly 200 with multiple ventilation chambers and achieving multi-ring combustion. Since the multiple premixing chambers 111 are sequentially arranged circumferentially along the central gas chamber 121, their arrangement along the circumference of the burner head 100 effectively simplifies the structure of the burner head 100 and reduces its processing cost. Furthermore, at least one outer ring ejector tube... Extending in the same direction as the central ejector tube 2a, the extension directions of the remaining outer ring ejector tubes are set at an angle to the extension direction of the central ejector tube 2a. This allows multiple ejector channels to be set on the furnace head 100 while avoiding the problem of large radial dimension requirements for the furnace head 100 caused by all ejector channels being arranged side by side. It also facilitates the circumferential arrangement of the outer ring ejector tubes and the corresponding premixing chambers 111 on the furnace base 1, thereby simplifying the communication structure between the inner cavity of the ejector tube 2 and the premixing chamber 111, further simplifying the structure of the furnace head 100 and reducing the processing cost of the furnace head 100.

[0056] The burner provided in this embodiment, by adopting the aforementioned burner head 100, can achieve multi-ring combustion while simplifying the burner structure and reducing the burner's processing cost.

[0057] The flame cap assembly 200 includes a central flame cap 201 and at least one annular flame cap coaxial with and spaced apart from the central flame cap 201. The central flame cap 201 has a venting cavity, and the other venting cavities are disposed on the annular flame caps. In one embodiment, two annular flame caps are provided, with one annular flame cap closer to the central flame cap 201 having a venting cavity, and the other annular flame cap having two venting cavities.

[0058] Specifically, the ventilation chamber in the central flame cap 201 is the central ventilation chamber 2011, and the flame holes on the central flame cap 201 are the central flame holes 2012. Preferably, multiple central flame holes 2012 are arranged at intervals along the circumference of the central flame cap 201. The two annular flame caps are the first annular flame cap 202 and the second annular flame cap 203. The ventilation chamber of the first annular flame cap 202 is the first ventilation chamber 2021, and its flame holes are the first flame holes 2022, which are connected to the first ventilation chamber 2021. The second annular flame cap 203 is provided with a second ventilation chamber 2031 and a third ventilation chamber 2033 separated by inner and outer sides. The inner annular wall or the inner top wall of the second annular flame cap 203 is provided with a second flame hole 2032 that is connected to the second ventilation chamber 2031, and the outer annular wall of the second annular flame cap 203 is provided with a third flame hole 2034 that is connected to the third ventilation chamber 2033. In one embodiment, the first flame hole 2022, the second flame hole 2032, and the third flame hole 2034 are all provided in multiples at intervals along the circumference of the corresponding flame cap. In other embodiments, the first flame hole 2022, the second flame hole 2032, and / or the third flame hole 2034 are circumferential seam structures.

[0059] It is worth noting that the structure of the above-mentioned flame cap assembly 200 is only an exemplary structure. Existing multi-ring flame cap structures with multiple ventilation chambers can be applied to this embodiment. This embodiment does not limit or elaborate on the specific structure of the flame cap assembly 200.

[0060] like Figure 4 and Figure 5 As shown, in one embodiment, three premixing chambers 111 are provided, thereby enabling the burner head 100 to supply gas to the burner cap assembly 200 with four ventilation chambers, achieving four-ring combustion in the burner, while keeping the structure of the burner head 100 from becoming overly complex. In other embodiments, the number of premixing chambers 111 can be four or more.

[0061] Specifically, the three premixing chambers 111 are the first premixing chamber 111a, the second premixing chamber 111b, and the third premixing chamber 111c. Correspondingly, three outer ring ejector tubes are provided, namely the first ejector tube 2b, the second ejector tube 2c, and the third ejector tube 2d. The inner cavity of the first ejector tube 2b forms the first ejector channel 2b1, the inner cavity of the second ejector tube 2c forms the second ejector channel 2c1, the inner cavity of the third ejector tube 2d forms the third ejector channel 2d1, and the inner cavity of the central ejector tube 2a forms the central ejector channel 2a1. The gas distribution seat 300 is provided with three gas distribution chambers, which are, from the inside to the outside, the first gas distribution chamber 3011, the second gas distribution chamber 3012, and the third gas distribution chamber 3013. The central ejection channel 2a1 is connected to the central ventilation chamber 2011. The first ejection channel 2b1, the first air distribution chamber 3011 and the first ventilation chamber 2021 are connected in sequence. The second ejection channel 2c1, the second air distribution chamber 3012 and the second ventilation chamber 2031 are connected in sequence. The third ejection channel 2d1, the third air distribution chamber 3013 and the third ventilation chamber 2033 are connected in sequence.

[0062] This embodiment describes the structure of the burner head 100 and burner with three premixing chambers 111. However, it is understood that when there are two or more premixing chambers 111, the structure of the burner head 100 and burner can be set with reference to this embodiment, and will not be described in detail here.

[0063] To improve the rationality of the ejector channel layout, in one embodiment, two outer ring ejector tubes are arranged side by side with the central ejector tube 2a and extend in the same direction, while another outer ring ejector tube is arranged at an angle to the central ejector tube 2a. This simplifies the connection structure between the other two ejector channels and the premixing chamber 111. Preferably, the extension direction of the other outer ring ejector tube is perpendicular to that of the central ejector tube 2a, thereby reducing the overall footprint of the burner head 100 and facilitating its installation in the gas stove.

[0064] In another embodiment, the outer ring ejector tube and the central ejector tube 2a may extend at an obtuse angle. In yet another embodiment, one outer ring ejector tube and the central ejector tube 2a may be arranged side by side and extend in the same direction, while two other outer ring ejector tubes may be arranged side by side and at an angle to the extending direction of the central ejector tube 2a.

[0065] To improve the overall structural stability of the burner head 100, two adjacent ejector tubes 2 are connected by a connecting bridge among the three ejector tubes 2 arranged side by side, so that the three ejector tubes 2 arranged side by side form an integral structure, ensuring the reliability of the relative position between the three ejector tubes 2, thereby improving the overall structural strength of the burner head 100.

[0066] Specifically, in one embodiment, the first premixing chamber 111a, the third premixing chamber 111c, and the second premixing chamber 111b are arranged sequentially along the circumference of the central gas chamber 121. Correspondingly, the first ejector tube 2b, the central ejector tube 2a, the third ejector tube 2d, and the second ejector tube 2c are arranged sequentially along the circumference of the furnace base 1, and the first ejector tube 2b, the central ejector tube 2a, and the third ejector tube 2d are arranged side by side and extend in the same direction. In other embodiments, the first premixing chamber 111a, the second premixing chamber 111b, and the third premixing chamber 111c can be arranged in other ways, as long as there is an outer ring ejector tube on each side of the central ejector tube 2a.

[0067] To further simplify the structure of the furnace head 100, in one embodiment, each premixing chamber 111 is arranged in a fan shape, and the axis of the fan shape is the axis of the central gas chamber 121. The outer diameter of each premixing chamber 111 is equal, which makes the structure of the premixing chamber 111 relatively simple, thereby simplifying the structure of the furnace head 100 and reducing the processing difficulty of the furnace head 100.

[0068] In one embodiment, the furnace base 1 includes a main body 11 and a central tube 12 having a central gas cavity 121. The main body 11 has an open, fan-shaped cavity, which is divided into multiple premixing chambers 111 by a partition structure 13. The axis of the cavity is collinear with the axis of the central tube 12. An outer ring ejector tube is connected to the main body 11. The furnace base 1 also includes a horizontal tube 14 having a transverse channel 141. One end of the horizontal tube 14 is connected to the lower end of the central tube 12, and the other end of the horizontal tube 14 extends radially outward from the main body 11 and is connected to the central ejector tube 2a. The central gas cavity 121 is connected to the central ejector channel 2a1 through the transverse channel 141. By setting the main body 11 into a fan-shaped structure, the structure of the furnace base 1 can be further simplified, and the processing difficulty of the furnace base 1 can be reduced. The angle of the fan-shaped structure is greater than 180°.

[0069] Furthermore, the horizontal tube portion 14 protrudes from the bottom of the cavity, making the lower surface of the main body portion 11 smoother and facilitating the alignment of the central ejector tube 2a and the outer ring ejector tubes with their central axes in the same plane. In the horizontal projection plane, the horizontal tube portion 14 traverses the premixing cavity 111 located in the middle, facilitating the placement of the central ejector tube 2a between the two outer ring ejector tubes. Specifically, the horizontal tube portion 14 protrudes from the bottom of the third premixing cavity 111c.

[0070] In one embodiment, the partition structure 13 includes at least two partition plates, all of which are spaced apart circumferentially along the central tube 12 and each partition plate extends radially along the central tube 12. Premixing cavities 111 are formed between adjacent partition plates and between the circumferential end wall of the cavity and adjacent partition plates. By using partition plates to separate the inner cavity to form the premixing cavities 111, the structure of the furnace base 1 can be further simplified, and the processing difficulty of the furnace base 1 can be reduced. That is, the premixing cavities 111 have a fan-shaped structure.

[0071] To further reduce the processing difficulty of the furnace base 1, the furnace base 1 and the ejector tube 2 are detachably connected, so that the furnace base 1 and the ejector tube 2 can be processed separately, simplifying the processing technology of the furnace base 1 and reducing the processing difficulty of the furnace base 1. In other embodiments, the furnace base 1 and the ejector tube 2 can also be integrally formed, or the furnace base 1 and part of the ejector tube 2 can be integrally formed.

[0072] Furthermore, a connecting pipe portion 120 protrudes from the outer wall of the main body 11. The connecting pipe portion 120 corresponds one-to-one with the ejector tube 2. The ejector tube 2 is sealed and inserted into the corresponding connecting pipe portion 120 to achieve installation positioning through insertion, thereby improving installation reliability. Furthermore, the ejector tube 2 includes a tube body and a protruding ring portion protruding from the outer wall of the tube body. The tube body has an ejection channel, and the air outlet end of the tube body is inserted into the connecting pipe portion 120. The end face of the connecting pipe portion 120 abuts against the protruding ring portion to achieve disassembly, assembly, positioning, and limiting of both.

[0073] Furthermore, the connecting tube portion 120 corresponding to the central ejector tube 2a is formed by extending outward from the horizontal tube portion 14, and the connecting tube portions 120 corresponding to the other outer ring ejector tubes are connected to the outer side wall of the corresponding premixing chamber 111, and the inner cavity is connected to the corresponding premixing chamber 111.

[0074] like Figures 3 to 7 As shown, to further reduce the overall size of the furnace base 1, in one embodiment, at least one premixing chamber 111 has an expansion portion formed by radially expanding the outer side wall at its upper end. The expansion portion has an expansion cavity communicating with the corresponding premixing chamber 111. By providing the expansion portion, the upper end of the furnace head 100 can be locally widened, thereby facilitating communication between the premixing chamber 111 and the outermost gas distribution chamber. In other embodiments, gas supply to the outermost ventilation chamber can also be achieved through structural configuration of the gas distribution seat 300.

[0075] In one embodiment, three premixing chambers 111 are arranged around the central air chamber 121, wherein the upper outer walls of two premixing chambers 111 are radially expanded with expansion portions, and the outer diameters of the expansion portions of the two expansion portions are different.

[0076] Specifically, the upper end of the outer wall of the second premixing chamber 111b expands outward to form a first expansion portion 15, which has a first expansion cavity 151 communicating with the second premixing chamber 111b; the upper end of the outer wall of the third premixing chamber 111c expands outward to form a second expansion portion 16, which has a second expansion cavity 161 communicating with the third premixing chamber 111c. The second expansion portion 16 protrudes radially outward relative to the first expansion portion 15 along the central air cavity 121, and the outer diameter of the second expansion portion 16 is larger than the outer diameter of the first expansion portion 15. The outer diameter of the second expansion cavity 161 is larger than the outer diameter of the first expansion cavity 151. Furthermore, the expansion cavities of two adjacent premixing chambers 111 are separated by a partition structure 13.

[0077] Furthermore, on the horizontal projection plane, the expansion chamber and the corresponding gas distribution chamber at least partially overlap, that is, the premixing chamber 111 with the expansion chamber is connected to the corresponding gas distribution chamber through the expansion chamber. Specifically, on the horizontal projection plane, the first expansion chamber 151 and the second gas distribution chamber 3012 at least partially overlap, and the second expansion chamber 161 and the third gas distribution chamber 3013 at least partially overlap. This facilitates the connection between the second premixing chamber 111b and the second gas distribution chamber 3012 through the first expansion chamber 151, and the third premixing chamber 111c and the third gas distribution chamber 3013 through the second expansion chamber 161. While achieving the connection between the premixing chamber 111 and the corresponding gas distribution chamber, the overall size and weight of the burner head 100 are reduced, thereby reducing the weight and cost of the burner. At the same time, this arrangement also simplifies the fit structure between the gas distribution seat 300 and the burner head 100.

[0078] In one embodiment, at least one expansion portion has a mounting protrusion 18 connected to its outer side wall. The mounting protrusion 18 is used to mount a first ignition needle 500, thereby facilitating the mounting of the first ignition needle 500 to the outside of the flame cap assembly 200. Further, the mounting protrusion 18 is provided with a first mounting hole and a first fastening hole. The first mounting hole is used to pass through the first ignition needle 500, and the first fastening hole is used to pass through and fasten a first fastener to the first ignition needle 500 and the mounting portion. Further, the mounting protrusion 18 is also provided with a third mounting hole for mounting a first thermocouple 700.

[0079] Specifically, the burner head 100 is equipped with a first ignition needle 500 and a second ignition needle 600. The first ignition needle 500 is installed on the mounting protrusion 18, and the second ignition needle 600 is installed near the central gas chamber 121, so that the second ignition needle 600 can be set close to the central burner cap 201 to achieve ignition at the corresponding burner holes of the two inner ventilation chambers.

[0080] In one embodiment, the main body 11 has two side end plates 112 that are circumferentially opposite and spaced apart. A mounting plate 17 is connected between the upper ends of the side end plates 112. The mounting plate 17 is provided with a second mounting hole 1122 for mounting a second ignition needle 600. Specifically, the second ignition needle 600 is mounted on the mounting plate 17, thereby allowing the lower end of the second ignition needle 600 to extend into the gap between the two side end plates 112, which facilitates the avoidance of the wiring structure of the lower end of the second ignition needle 600 by the main body 11.

[0081] Furthermore, the mounting plate 17 has a fan-shaped structure and its inner end is connected to the central tube portion 12. That is, the mounting plate 17 blocks the upper end of the lateral space of the main body portion 11. Furthermore, a second thermocouple 800 is also mounted on the mounting plate 17.

[0082] like Figures 3 to 5 As shown, in one embodiment, both the premixing chamber 111 and the expansion chamber are open at the top. The burner head 100 also includes a cover 3, which covers the upper end of the burner base 1 and seals the upper openings of the premixing chamber 111 and the expansion chamber. The cover 3 is provided with a vent 34 for each premixing chamber 111, and a central hole 331 is provided for the central gas chamber 121. The vent 34 corresponding to the premixing chamber 111 with the expansion section is located above the corresponding expansion chamber, and the distance between the multiple vent 34 and the center line of the central gas chamber 121 is different. This facilitates the control of the gas supply speed and flow rate from the premixing chamber 111 to the gas distribution chamber through the arrangement of the vent 34 and the central hole 331, which is beneficial for realizing the connection between the premixing chamber 111 and the gas distribution chamber and the setting of the sealing structure.

[0083] Specifically, three vents 34 are provided, namely a first vent 34a, a second vent 34b, and a third vent 34c. The first vent 34a is positioned directly opposite the first premixing chamber 111a and connects the first premixing chamber 111a and the first air distribution chamber 3011. The second vent 34b is positioned directly opposite the first expansion chamber 151 and connects the first expansion chamber 151 and the second air distribution chamber 3012. The third vent 34c is positioned directly opposite the second expansion chamber 161 and connects the second expansion chamber 161 and the third air distribution chamber 3013. The first vent 34a, the second vent 34b, and the third vent 34c gradually move away from the central air chamber 121.

[0084] In one embodiment, the cross-sectional area of ​​the plurality of vent holes 34 gradually increases in the direction away from the central air chamber 121, thereby increasing the airflow of the outer vent holes 34, improving the air supply to the outer air chamber, and better meeting the combustion requirements at the outer burner cap. Specifically, the cross-sectional areas of the first vent hole 34a, the second vent hole 34b, and the third vent hole 34c gradually increase.

[0085] In one embodiment, the first vent 34a, the second vent 34b, and the third vent 34c are all arc-shaped holes, with the axis corresponding to the arc-shaped holes coaxial with the axis of the central air cavity 121. This simplifies the machining of the first vent 34a, the second vent 34b, and the third vent 34c, and improves the smoothness of airflow through the vents 34. The arc length of the first vent 34a, the second vent 34b, and the third vent 34c gradually increases along the circumference of the central air cavity 121.

[0086] like Figure 3 and Figure 7 As shown, the cover 3 further includes a cover plate portion 31, with a central sleeve portion 33 protruding upward from the cover plate portion 31. The central sleeve portion 33 is coaxially arranged with the central gas chamber 121, and the inner hole of the central sleeve portion 33 forms a central hole 331. By providing the central sleeve portion 33 protruding from the cover plate portion 31, the innermost central flame cap 201 of the flame cap assembly 200 can be directly installed on the central sleeve portion 33, thereby simplifying the structure of the gas distribution seat 300 and improving the installation convenience of the flame cap assembly 200. The cover plate portion 31 is provided with the aforementioned central hole 331.

[0087] Specifically, the gas distribution seat 300 has a central through hole, and all gas distribution chambers are arranged around the central through hole. The gas distribution seat 300 is supported on the cover plate portion 31, and the central sleeve portion 33 is coaxially inserted through the central through hole. The flame cap assembly 200, except for the central flame hole 2012, is mounted on the gas distribution seat 300. That is, the central flame cap 201 is mounted on the central sleeve portion 33, and the first annular flame cap 202 and the second annular flame cap 203 are both mounted on the gas distribution seat 300.

[0088] Furthermore, a flange protrudes outward from the upper end of the main body 11 to increase the structural area between the upper end of the main body 11 and the cover 3. To improve the connection convenience between the cover 3 and the furnace base 1, a fixing ear 19 extends outward from the flange, and multiple fixing ears 19 are spaced apart along the circumference of the main body 11. The cover plate 31 has a cover plate ear 311 protruding outward, and the cover plate ear 311 and the fixing ear 19 are correspondingly arranged one-to-one, and the cover plate ear 311 and the fixing ear 19 are connected by fasteners passing through them.

[0089] Furthermore, one of the corresponding cover plate ear portion 311 and the fixed ear portion 19 is provided with a positioning protrusion 110, and the other is provided with a positioning hole. The positioning protrusion 110 is inserted into the positioning hole to realize the assembly positioning of the cover body 3 and the furnace base 1, so as to ensure the assembly reliability and stability.

[0090] like Figure 4 , Figure 7 and Figure 8As shown, a first positioning protrusion ring 32 protrudes from the upper side of the cover plate portion 31. The first positioning protrusion ring 32 is correspondingly arranged with the vent hole 34, and the vent hole 34 passes through the first positioning protrusion ring 32 and the cover plate portion 31. The gas distribution seat 300 includes a main seat portion 301, which has a gas distribution chamber. Each gas distribution chamber has an air inlet hole 3014 at its bottom. A second positioning protrusion ring 302 protrudes from the bottom surface of the main seat portion 301 around each air inlet hole 3014. The first positioning protrusion ring 32 and the second positioning protrusion ring 302 are correspondingly arranged, and the first positioning protrusion ring 32 and the second positioning protrusion ring 302 are inserted and fitted together to seal and communicate with the corresponding air inlet hole 3014. Thus, the installation and positioning of the gas distribution seat 300 and the burner head 100 can be achieved through the insertion and fitting of the first positioning protrusion ring 32 and the second positioning protrusion ring 302, ensuring the installation accuracy of both and simplifying the installation structure of both.

[0091] In one embodiment, a positioning slot 303 is formed between the second positioning protrusion 302 and the lower end face of the main seat 301. An air inlet 3014 is disposed at the bottom of the positioning slot 303. The first positioning protrusion 32 is inserted into the positioning slot 303 and abuts against the bottom of the slot. This further enables installation positioning and facilitates the sealing of the connection between the air inlet 3014 and the vent 34. In another embodiment, the lower end face of the second positioning protrusion 302 may abut against the upper end face of the burner head 100.

[0092] In one embodiment, each gas distribution chamber is provided with an air inlet 3014. To avoid the problem of low gas flow in gas distribution chambers located far from the air inlet 3014, a flow equalization plate 400 is provided inside each gas distribution chamber. The flow equalization plate 400 is mounted above the air inlet 3014 and extends at both ends in a direction away from the air inlet 3014 to guide the mixed gas flow along the circumference of the gas distribution chamber to all parts of the gas distribution chamber. The flow equalization plate 400 has air holes to ensure that some of the mixed gas flow can flow directly upward into the ventilation chamber through the air holes.

[0093] To enable the burner head 100 to be installed on the base, the lower end of the main body of the base is connected to a support leg 130. At least two support legs 130 are spaced apart along the circumference of the main body of the base. The end of the support leg 130 away from the main body 11 is detachably connected to the base.

[0094] 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.

[0095] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A stove head, characterized in that, include: The furnace base (1) has a vertically arranged central gas chamber (121) and a plurality of premixing chambers (111) arranged sequentially along the circumference of the central gas chamber (121); The ejector tube (2) includes a central ejector tube (2a) and multiple outer ring ejector tubes. The outlet end of the central ejector tube (2a) is connected to the central air chamber (121). The multiple outer ring ejector tubes are arranged one-to-one with the multiple premixing chambers (111) and are individually connected. At least one of the outer ring ejector tubes extends in the same direction as the central ejector tube (2a), and the extension direction of the remaining outer ring ejector tubes is set at an angle to the extension direction of the central ejector tube (2a).

2. The burner head according to claim 1, characterized in that, At least one of the premixing cavities (111) has an expansion portion formed radially outward on its upper outer side wall, the expansion portion having an expansion cavity communicating with the corresponding premixing cavity (111).

3. The burner head according to claim 2, characterized in that, The premixing chamber (111) is provided in three around the central air chamber (121). The upper outer walls of two of the premixing chambers (111) are radially expanded to form expansion portions. One expansion portion protrudes radially outward relative to the other expansion portion along the central air chamber (121). And / or, an outer side of the expansion portion is connected to a mounting protrusion (18), the mounting protrusion (18) being provided with a first mounting hole for mounting a first ignition needle (500).

4. The burner head according to claim 2, characterized in that, The premixing chamber (111) and the expansion chamber are both open at the top. The furnace head also includes a cover (3), which covers the upper end of the furnace base (1) and closes all the upper openings of the premixing chamber (111) and the expansion chamber. The cover (3) is provided with a vent (34) for each of the premixed chambers (111), and the vent (34) corresponding to the premixed chamber (111) with the expansion section is located above the corresponding expansion chamber. The distance between the multiple vents (34) and the center line of the central air chamber (121) is different.

5. The burner head according to claim 4, characterized in that, The cover (3) includes a cover plate (31) and a central sleeve (33) protruding from the upper side of the cover plate (31). The inner cavity of the central sleeve (33) is coaxially connected with the central air cavity (121). The cover plate (31) covers the upper end of the furnace base (1) and has the ventilation hole (34). And / or, the cover (3) includes a cover plate portion (31) and a first positioning protrusion ring (32) protruding from the cover plate portion (31), the first positioning protrusion ring (32) and the vent hole (34) are respectively provided, and the vent hole (34) vertically penetrates the first positioning protrusion ring (32); And / or, the cross-sectional area of ​​the plurality of vents (34) gradually increases in the direction away from the central air chamber (121).

6. The burner head according to any one of claims 1-5, characterized in that, The furnace base (1) includes a main body (11) and a central tube (12) having the central gas cavity (121). The main body (11) has an open cavity arranged in a fan shape. The fan-shaped cavity is divided into multiple premixed cavities (111) by a partition structure (13). The axis of the cavity is collinear with the axis of the central tube (12). The outer ring ejector tube is connected to the main body (11). The furnace base (1) also includes a horizontal tube (14). One end of the horizontal tube (14) is connected to the lower end of the central tube (12). The other end of the horizontal tube (14) extends radially outward from the main body (11) and is connected to the central ejector tube (2a).

7. The burner head according to claim 6, characterized in that, The partition structure (13) includes at least two partition plates, all of which are spaced apart circumferentially along the central tube (12) and each partition plate extends radially along the central tube (12). The premixing cavity (111) is formed between two adjacent partition plates and between the circumferential end wall of the cavity and the adjacent partition plate.

8. The burner head according to claim 6, characterized in that, The main body (11) has two side end plates (112) that are circumferentially opposite to each other and arranged at an angle. The two side end plates (112) are connected to the central tube (12) and extend radially along the central tube (12). A mounting plate (17) is connected between the upper ends of the two side end plates (112). The mounting plate (17) has a second mounting hole for mounting a second ignition needle (600) near the central tube (12).

9. A burner, characterized in that, include: The burner head as described in any one of claims 1-8; A gas distribution seat (300) is installed at the upper end of the burner head. The gas distribution seat (300) has multiple gas distribution chambers, and the gas distribution chambers are arranged in a one-to-one correspondence with the premixing chamber (111) and are connected. The flame cap assembly (200) is installed on the upper side of the gas distribution seat (300), and the flame cap assembly (200) includes a plurality of ventilation chambers arranged sequentially from the inside to the outside. The central gas chamber (121) is connected to the innermost ventilation chamber, and the remaining ventilation chambers are arranged and connected to the gas distribution chambers one by one.

10. A gas stove, characterized in that, Includes the burner as described in claim 9.

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