An updraft burner and gas stove

Abstract

The utility model provides a kind of upper air inlet burner and gas stove, it is related to gas stove technical field.At least three independent gas outlets are provided in chassis furnace end, gas distribution disc is provided with the injection pipe corresponding with gas outlet one by one, that is, burner in the present scheme is provided with at least three injection pipes, ensure that the proportion of the air mixture of each injection pipe is uniform and sufficient, avoid the problem of single or double injection unit injection capacity, the gas outlet end of at least three injection pipes is communicated with the pressure stabilizing chamber, on the basis of not increasing the area of fire hole, the heat load of burner can reach more than 4.5KW, meet the high-power demand of large-size pot, stir-frying scene, at the same time, the setting of at least three injection pipes can ensure airflow velocity, thereby prevent the problems such as backfire, fire noise.

Description

Technical Field

[0001] This utility model relates to the field of gas stoves, and in particular to an upward-intake burner and a gas stove. Background Technology

[0002] The top-intake burner is a common component of gas stoves. Its general principle is as follows: gas is distributed to the nozzle through the valve body and then sprayed out by the nozzle into the corresponding injection tube. After the gas is mixed with primary air inside the injection tube, it is transported to the burner chamber and finally flows out through the burner holes to complete combustion.

[0003] Currently, commonly used top-inlet burners mainly include two types of structures: one is a single-cavity ejector structure, and the other is a double-cavity ejector structure, both of which are mature and mass-produced structures in the industry. However, for high-load (above 4.5kW) applications, existing top-inlet burners have clear technical defects, namely, limited power increase. Due to limitations in ejector mixing capacity and burner cap air distribution, existing top-inlet burners cannot stably reach heat loads above 4.5kW, and cannot meet the high-power requirements of large-size cookware, stir-frying, and other applications. Forcibly increasing the burner hole area will lead to a decrease in combustion stability, resulting in problems such as backfire, flameout noise, etc., making it difficult to guarantee product reliability. Utility Model Content

[0004] The first technical problem solved by this utility model is to provide an upward-intake burner that can achieve a stable high power output of 4.5kW or more and has good combustion stability.

[0005] The second technical problem solved by this utility model is to provide a gas stove that is suitable for high-power applications and has high thermal efficiency.

[0006] The first technical problem mentioned above is solved by the following technical solution: An upward-inlet burner, wherein the upward-inlet burner comprises: The base frame burner head is provided with at least three independent gas outlets, and each of the gas outlets is provided with a nozzle at the gas outlet end; The gas distribution plate is assembled on the base frame burner head. The gas distribution plate is provided with at least three ejector tubes. In the assembled state, the nozzles are directly facing the gas inlet end of the ejector tubes, and at least three nozzles correspond one-to-one with at least three ejector tubes. The flame cap is fitted onto the gas distribution plate, and a pressure stabilizing cavity is formed between the flame cap and the gas distribution plate. The gas outlet ends of at least three ejector tubes are all connected to the pressure stabilizing cavity. The flame cap has multiple flame outlet holes that are connected to the pressure stabilizing cavity.

[0007] Compared with the prior art, the top-inlet burner of this utility model has the following advantages: The top-inlet burner of this technical solution has at least three independent air outlets in the base burner head, and the gas distribution plate is equipped with ejector tubes corresponding to each air outlet. That is, the burner in this solution has at least three ejector tubes, which ensures that the primary air mixing ratio of each ejector tube is uniform and sufficient, avoiding the problem of insufficient ejection capacity of a single or dual ejector unit. The air outlets of at least three ejector tubes are all connected to the pressure stabilizing chamber. Without increasing the flame hole area, the heat load of the burner can reach more than 4.5KW, which meets the high power requirements of large-sized cookware and stir-frying scenarios. At the same time, the setting of at least three ejector tubes can ensure the airflow velocity, thereby preventing problems such as backfire and flameout noise.

[0008] In one embodiment, the base frame burner head includes a base formed in a columnar structure, the base is provided with an air inlet channel, and the base is provided with an air outlet, each of the air outlets being connected to the air inlet channel; Along the axial direction of the base, the air outlet end is located on the side of the base; the air outlet ends of the plurality of air outlets are evenly distributed at intervals along the circumference of the base.

[0009] In one embodiment, the bottom side of the base is provided with an air inlet that communicates with the air intake channel; An mounting plate is fitted onto the outer side of the base, and the mounting plate is used to assemble with the gas stove panel; along the axial direction of the base, the mounting plate is located between the gas outlet and the gas inlet.

[0010] In one embodiment, along the axial direction of the air distribution plate, the air distribution plate is formed with a mounting groove corresponding to the base, and the air distribution plate is covered by the mounting groove at the top of the base; a positioning structure is also provided between the air distribution plate and the base so that the axis of the air distribution plate is collinear with the axis of the base.

[0011] In one embodiment, the positioning structure includes a protrusion and a recess that can be correspondingly fitted; the protrusion is located on the end face of the top end of the base, and the recess is located on the end face of the bottom end of the mounting groove; or, the recess is located on the end face of the top end of the base, and the protrusion is located on the end face of the bottom end of the mounting groove.

[0012] In one embodiment, along the axial direction of the air distribution plate, the air distribution plate is defined as including a small-diameter portion and a large-diameter portion connected in sequence; The small diameter portion is provided with ejector tubes, and a plurality of ejector tubes are evenly distributed at circumferential intervals along the small diameter portion; each ejector tube extends radially along the small diameter portion such that the outlet end of each ejector tube penetrates the outer side of the small diameter portion.

[0013] In one embodiment, a first annular step is formed on the outer edge of the end face of the top of the large-diameter portion, and an annular protrusion is formed on the outer side of the small-diameter portion, so that a second annular step is formed on the outer edge of the end face of the top of the small-diameter portion. The burner cap covers the gas distributor via the first and second annular steps, thereby forming the pressure stabilizing cavity between the small-diameter portion and the large-diameter portion.

[0014] In one embodiment, along the axial direction of the flame cap, the flame cap includes a cylindrical section and a conical section arranged sequentially; the flame outlet includes a main flame hole and a flame stabilizing hole disposed on the outer side of the conical section, and the flame outlet also includes an inner flame hole disposed on the inner side of the conical section.

[0015] In one embodiment, a plurality of main flame holes are evenly spaced along the circumferential interval of the conical segment, and a plurality of flame stabilizing holes are evenly spaced along the circumferential interval of the conical segment; along the axial direction of the flame cap, the main flame holes are close to the top of the flame cap; the diameter of the main flame holes is larger than the diameter of the flame stabilizing holes.

[0016] The second technical problem mentioned above is solved by the following technical solution: A gas stove, wherein the gas stove includes an upper air intake burner as described above.

[0017] Compared with the prior art, the gas stove described in this utility model has the following beneficial effects: The gas stove of this technical solution has at least three ejector units (formed by connecting the gas outlet and the ejector tube) in the upper air intake burner, so that each ejector unit only needs to bear a heat load of about 1.5kW at most, and can still maintain stable combustion in the range of 4.5kW-5.2kW of total power. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an assembly diagram of the top-inlet burner of this utility model; Figure 2 This is an exploded schematic diagram of the top-inlet burner of this utility model; Figure 3 This is a schematic diagram of the base frame and burner head of this utility model; Figure 4This is a schematic diagram of the air distribution plate of this utility model; Figure 5 This is another schematic diagram of the air distribution plate of this utility model; Figure 6 This is a schematic diagram of the assembly of the base frame, burner head, and gas distribution plate of this utility model; Figure 7 This is a schematic diagram of the flame cap of this utility model; Figure 8 This is a cross-sectional view of the top-inlet burner of this utility model.

[0020] Label Explanation: 1-Bottom frame burner head; 11-Base; 111-Air inlet; 112-Air outlet; 113-Nozzle; 114-Protrusion; 115-Air inlet channel; 12-Mounting plate; 2-Gas distribution plate; 21-Small diameter section; 22-Large diameter section; 23-Pressure stabilizing chamber; 241-First annular step; 242-Second annular step; 25-Ejector tube; 26-Assembly groove; 261-Recess; 3-Burner cap; 31-Flame stabilizing hole; 32-Main flame hole; 33-Inner flame hole. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] The terms "first," "second," "third," and "fourth" 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, "multiple" means two or more.

[0024] 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.

[0025] The first aspect of this utility model provides an upper-inlet burner, such as... Figures 1 to 2 As shown, the top-inlet burner in this embodiment includes a base frame burner head 1, a gas distribution plate 2, and a burner cap 3 connected in sequence. The cooperation of these three components enables the burner to be stably applied to high-power applications while significantly improving thermal efficiency to meet energy efficiency requirements. The structure and assembly relationship of the aforementioned components of the top-inlet burner according to this utility model will be described in detail below.

[0026] In this embodiment, as Figure 3 As shown, the base burner head 1 includes a base 11 and a mounting plate 12 sleeved on the outer side of the base 11. Specifically, the base 11 is formed into a triangular prism-like structure (to accommodate the arrangement of the three gas outlets 112 described below). When the burner is in use, the axial direction of the base 11 is the height direction. The mounting plate 12 is located at the middle of the axial direction of the base 11, and has mounting holes formed on it that can be fitted to the gas stove panel. The mounting plate 12 enables the burner to be stably installed on the gas stove, providing stable assembly support for the gas distribution plate 2 and the burner cap 3, so as to ensure the coaxiality of the assembly of the base burner head 1, the gas distribution plate 2, and the burner cap 3.

[0027] Furthermore, such as Figure 8As shown, an air intake channel 115 is formed inside the base 11. An air inlet 111 communicating with the air intake channel 115 is formed on the bottom side of the base 11, and three air outlets 112 are formed on the top side of the base 11. Each air outlet 112 extends radially (essentially horizontally) along the base 11. When the burner is in use, the air outlets 112 are located above the gas stove panel to facilitate air intake from the stove surface. Furthermore, each air outlet 112 penetrates the corresponding side wall of the base 11 to connect the air intake channel 115 with the external space. The air inlet 111 is connected to a gas delivery device, allowing gas to enter the air intake channel 115 of the base 11 through the air inlet 111 and then flow into the three air outlets 112. In this embodiment, the outlet ends of the three air outlets 112 are evenly distributed circumferentially along the base 11, meaning the outlet ends of the three air outlets 112 are essentially horizontally distributed. Preferably, the outlet end of each gas outlet 112 is located at the center (in the width direction) of the corresponding side of the base 11 to ensure uniform gas distribution.

[0028] It should be noted that the number of air outlets 112 is not limited to this, and there are at least three, in order to reduce the heat load borne by each ejector unit (formed by the corresponding connection of the air outlets 112 and the ejector tubes 25 described below), thereby avoiding the problems of insufficient ejection capacity of a single ejector unit and uneven mixing. Correspondingly, when the number of air outlets 112 changes, the structure of the base 11 can also be changed accordingly. For example, if four air outlets 112 are provided, the base 11 can be formed into a cuboid structure.

[0029] Furthermore, each outlet 112 is equipped with a nozzle 113 at its outlet end to form a high-speed jet of gas from the gas in the outlet 112, thereby creating a low-pressure zone within the ejector tube 25 and thus achieving air suction. In this embodiment, the nozzle 113 and the outlet 112 are detachably connected (through threaded connection or snap-fit ​​connection, etc.), allowing for quick replacement of the corresponding nozzle 113 when the gas source is changed.

[0030] In this embodiment, as Figures 4 to 6As shown, along the axial direction of the air distribution plate 2, an annular recess is formed on the end face of the top of the air distribution plate 2, so that the air distribution plate 2 has a small-diameter portion 21 and a large-diameter portion 22 distributed along its axial direction. Both the small-diameter portion 21 and the large-diameter portion 22 are formed in a disc shape and are stacked sequentially. The outer diameter of the small-diameter portion 21 is smaller than the outer diameter of the large-diameter portion 22. Further, the small-diameter portion 21 is formed with a through hole penetrating both ends of its axial direction. Further still, the inner wall of the through hole of the small-diameter portion 21 (through an integral molding process) is formed with three ejector tubes 25. The three ejector tubes 25 are evenly distributed circumferentially along the small-diameter portion 21. Each ejector tube 25 extends radially along the small-diameter portion 21, and the outlet end of each ejector tube 25 penetrates the outer side of the small-diameter portion 21. Correspondingly, at the center of the small diameter portion 21, three ejector tubes 25 form an assembly groove 26 corresponding to the base 11. The air distribution plate 2 is covered by the assembly groove 26 and fits onto the top of the base 11, so that each nozzle 113 can be connected to the air inlet end of the ejector tube 25 one by one. That is, the ejector tubes 25 in this embodiment are also evenly distributed in the horizontal direction to facilitate the intake of air, thereby further improving the completeness and uniformity of the mixture and improving the completeness of combustion.

[0031] To ensure precise gas injection and achieve corresponding connection between the nozzle 113 and the ejector tube 25, a positioning structure is provided between the gas distribution plate 2 and the base 11 to ensure that the axis of the gas distribution plate 2 is collinear with the axis of the base 11. Figure 3 and Figure 5 As shown, the positioning structure in this embodiment includes a protrusion 114 and a recess 261 that can be fitted together. The protrusion 114 is located on the top end face of the base 11, and the recess 261 is located on the bottom end face of the assembly groove 26. However, it is not limited to this. For example, the recess 261 can also be set on the top end face of the base 11, and the protrusion 114 can be set on the bottom end face of the assembly groove 26. In addition, the protrusion 114 in this embodiment is formed into a triangular structure, which can have the technical effect of preventing mistakes, that is, ensuring the precise assembly of the gas distribution plate 2 and the base burner head 1.

[0032] In this embodiment, as Figures 4 to 5 As shown, a first annular step 241 is formed on the outer edge of the end face of the large diameter portion 22 of the gas distribution plate 2, and an annular protrusion is formed on the outer side of the small diameter portion 21, so that a second annular step 242 is formed on the outer edge of the end face of the small diameter portion 21. The flame cap 3 covers the gas distribution plate 2 through the first annular step 241 and the second annular step 242 to form a pressure stabilizing cavity 23 between the small diameter portion 21 and the large diameter portion 22, so that the gas outlet end of each ejector tube 25 can communicate with the pressure stabilizing cavity 23. The flame cap 3 is also provided with a flame outlet hole that communicates with the pressure stabilizing cavity 23 to facilitate the formation of a flame.

[0033] In this embodiment, as Figure 7As shown, along the axial direction of the flame cap 3, the flame cap 3 includes a cylindrical section and a conical section arranged sequentially (the outer diameter of the conical section gradually decreases from the bottom to the top). The flame outlet includes a main flame hole 32 and a flame stabilizing hole 31 disposed on the outer side of the conical section, and the flame outlet also includes an inner flame hole 33 disposed on the inner side of the conical section. Further, the multiple main flame holes 32 are evenly spaced along the circumference of the conical section, and the multiple flame stabilizing holes 31 are evenly spaced along the circumference of the conical section; and along the axial direction of the flame cap 3, the main flame holes 32 are closer to the top of the flame cap 3, and the diameter of the main flame holes 32 is larger than the diameter of the flame stabilizing holes 31. In addition, in this embodiment, the inner flame holes 33 are divided into three groups, with one group of inner flame holes 33 disposed between two adjacent ejector tubes 25.

[0034] Thus, the burner cap 3 of this burner has its flame holes divided into sections. A small amount of gas can be ejected through the flame stabilizing hole 31 to form a continuous and stable small flame around the edge of the burner cap 3. When the window is open or the range hood has a strong suction, this small flame ensures that even if the main flame in the main flame hole 32 briefly flickers, it can be quickly relit, and it also prevents the main flame from being blown away from the burner cap 3. The inner flame hole 33 is located on the innermost side of the burner cap 3 to directly heat the center of the pot bottom, thereby significantly improving thermal efficiency. In addition, with the synergistic effect of the main flame hole 32 and the inner flame hole 33, a complete heating surface can be formed from the center of the pot bottom to the edge of the pot.

[0035] Furthermore, the partitioned arrangement of the three-stage flame holes in this embodiment allows the gas to fully contact the air in each area of ​​the flame cap 3, resulting in more complete combustion.

[0036] According to the present invention, the top-inlet burner has at least three independent air outlets 112 in the base burner head 1, and the gas distribution plate 2 is provided with ejector tubes 25 corresponding to the air outlets 112. That is, the burner in this solution is provided with at least three ejector tubes 25, which ensures that the primary air mixing ratio of each ejector tube 25 is uniform and sufficient, avoiding the problem of insufficient ejection capacity of a single or dual ejector unit. The air outlets of at least three ejector tubes 25 are all connected to the pressure stabilizing chamber, which can enable the heat load of the burner to reach more than 4.5KW without increasing the flame hole area, meeting the high power requirements of large-size cookware and stir-frying scenarios. At the same time, the setting of at least three ejector tubes 25 can ensure the airflow speed, thereby preventing problems such as backfire and fire extinguishing noise.

[0037] A second aspect of this utility model provides a gas stove that includes an upper air intake burner as described above.

[0038] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be defined by the protection scope of the claims.

Claims

1. A top-inlet burner, characterized in that, The upper air intake burner includes: The base frame burner head (1) is provided with at least three independent gas outlets (112), and each of the gas outlets (112) is provided with a nozzle (113) at the gas outlet end. Gas distribution plate (2) is mounted on the base frame burner head (1). The gas distribution plate (2) is provided with at least three ejector tubes (25). In the assembled state, the nozzle (113) is directly facing the air inlet end of the ejector tube (25), and at least three of the nozzles (113) correspond one-to-one with at least three of the ejector tubes (25). The flame cap (3) is closed on the gas distribution plate (2). A pressure stabilizing cavity (23) is formed between the flame cap (3) and the gas distribution plate (2). The gas outlet ends of at least three ejector tubes (25) are connected to the pressure stabilizing cavity (23). The flame cap (3) has multiple flame outlet holes that are connected to the pressure stabilizing cavity (23).

2. The top-inlet burner according to claim 1, characterized in that, The base frame burner head (1) includes a base (11) formed in a columnar structure. The base (11) is provided with an air inlet channel (115) and an air outlet (112) on the base (11). Each air outlet (112) is connected to the air inlet channel (115). Along the axial direction of the base (11), the air outlet (112) is located on the side of the base (11); the air outlets (112) are evenly distributed at intervals along the circumference of the base (11).

3. The top-inlet burner according to claim 2, characterized in that, The bottom side of the base (11) is provided with an air inlet (111) that communicates with the air inlet channel (115). An mounting plate (12) is fitted on the outer side of the base (11), and the mounting plate (12) is used to assemble with the gas stove panel; along the axial direction of the base (11), the mounting plate (12) is located between the gas outlet (112) and the gas inlet (111).

4. The top-inlet burner according to claim 2, characterized in that, Along the axial direction of the air distribution plate (2), the air distribution plate (2) forms an assembly groove (26) corresponding to the base (11), and the air distribution plate (2) covers the top of the base (11) through the assembly groove (26); a positioning structure is also provided between the air distribution plate (2) and the base (11) so that the axis of the air distribution plate (2) is collinear with the axis of the base (11).

5. The top-inlet burner according to claim 4, characterized in that, The positioning structure includes a protrusion (114) and a recess (261) that can be fitted together; the protrusion (114) is located on the end face of the top of the base (11), and the recess (261) is located on the end face of the bottom of the mounting groove (26); or, the recess (261) is located on the end face of the top of the base (11), and the protrusion (114) is located on the end face of the bottom of the mounting groove (26).

6. The top-inlet burner according to claim 4, characterized in that, Along the axial direction of the air distribution plate (2), the air distribution plate is defined as including a small diameter portion (21) and a large diameter portion (22) connected in sequence. The small diameter portion (21) is provided with ejector tubes (25), and a plurality of ejector tubes (25) are evenly distributed at circumferential intervals along the small diameter portion (21); each ejector tube (25) extends radially along the small diameter portion (21) such that the outlet end of each ejector tube (25) penetrates the outer side of the small diameter portion (21).

7. The top-inlet burner according to claim 6, characterized in that, A first annular step (241) is formed on the outer edge of the end face of the top of the large diameter portion (22), and an annular protrusion is formed on the outer side of the small diameter portion (21) so that a second annular step (242) is formed on the outer edge of the end face of the top of the small diameter portion (21). The burner cap (3) covers the gas distribution plate (2) through the first annular step (241) and the second annular step (242) to form the pressure stabilizing cavity (23) between the small diameter portion (21) and the large diameter portion (22).

8. The top-inlet burner according to claim 1, characterized in that, Along the axial direction of the flame cap (3), the flame cap (3) includes a cylindrical section and a conical section arranged in sequence; the flame outlet includes a main flame hole (32) and a flame stabilizing hole (31) disposed on the outer side of the conical section, and the flame outlet also includes an inner flame hole (33) disposed on the inner side of the conical section.

9. The top-inlet burner according to claim 8, characterized in that, Multiple main flame holes (32) are evenly spaced along the circumferential interval of the conical segment, and multiple flame stabilizing holes (31) are evenly spaced along the circumferential interval of the conical segment; along the axial direction of the flame cap (3), the main flame holes (32) are close to the top of the flame cap (3); the diameter of the main flame holes (32) is larger than the diameter of the flame stabilizing holes (31).

10. A gas stove, characterized in that, The gas stove includes an upper air intake burner as described in any one of claims 1 to 9.

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