High-efficiency sheet metal furnace end

Abstract

The utility model discloses a high-efficiency sheet metal furnace end which comprises an upper furnace shell, a lower furnace shell and a partition plate, wherein the upper furnace shell, the lower furnace shell and the partition plate are made of stainless steel sheet metal; the furnace upper shell is provided with a circular-ring-shaped inverted-cone-shaped fire outlet upper wall. The furnace lower shell is provided with a circular-ring-shaped inverted-cone-shaped fire outlet lower wall; the fire outlet lower wall is arranged below the fire outlet upper wall at intervals; a plurality of spiral upper fire outlet grooves are formed in the fire outlet upper wall, and a plurality of spiral lower fire outlet grooves are formed in the fire outlet lower wall; the partition plate is arranged between the fire outlet upper wall and the fire outlet lower wall, and the upper fire outlet groove and the lower fire outlet groove are both communicated with the gas mixing cavity. According to the utility model, through the design of the circular-ring-shaped inverted-cone-shaped fire outlet walls of the upper furnace shell and the lower furnace shell and the staggered distribution of the spiral upper fire outlet grooves and the spiral lower fire outlet grooves, a double-layer rotary fire supply path is formed. After fuel gas and air are fully mixed in the gas mixing cavity, rotational flow flame is formed through the spiral channel, the secondary mixing efficiency of the fuel gas and the air is remarkably improved, and combustion is more sufficient.

Description

Technical Field

[0001] This utility model relates to the field of stove accessories technology, and in particular to a high-efficiency sheet metal stove head. Background Technology

[0002] Traditional gas appliance burners are mostly made of materials such as cast iron, aluminum alloy, or copper. However, these materials have significant drawbacks: cast iron is susceptible to corrosion and oxidation, and long-term use can lead to porosity or cracks, resulting in a risk of gas leakage; aluminum alloy has a low melting point and is prone to deformation at high temperatures, affecting combustion stability; while copper has excellent thermal conductivity, it is expensive and has limited oxidation resistance, and under long-term high-temperature conditions, the surface oxide layer is prone to peeling off, shortening its service life. In addition, burners made of traditional materials generally suffer from insufficient surface smoothness and low gas mixing efficiency, which can easily lead to incomplete combustion and pose safety hazards.

[0003] In recent years, stainless steel has gradually become the preferred material for burner manufacturing due to its advantages such as high melting point, resistance to high-temperature oxidation, high surface finish, and strong corrosion resistance. For example, Chinese patent CN202122777870.8 discloses a stainless steel sheet metal assembled burner head structure, which combines upper and lower sheet metal parts to form an injector tube and an annular mixing chamber. Although this reduces manufacturing costs, it is limited by the structural design, resulting in a single gas supply path that relies solely on direct injection nozzles for ignition. This design has significant shortcomings: firstly, the high flame concentration of the direct injection nozzles leads to uneven heat distribution in the combustion zone, easily causing localized overheating; secondly, the lack of a swirling combustion structure results in insufficient mixing of gas and air, leading to low combustion efficiency. Therefore, further improvements are needed. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a high-efficiency sheet metal furnace head.

[0005] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a high-efficiency sheet metal furnace head, comprising: an upper furnace shell, a lower furnace shell, and a partition plate made of stainless steel sheet metal.

[0006] The upper furnace shell is assembled with the upper furnace shell to form the main body of the furnace head. The main body of the furnace head includes a gas mixing chamber and an ejector tube that are connected to each other. The gas mixing chamber is arranged in a ring shape.

[0007] The upper furnace shell is provided with an annular inverted conical upper fire outlet wall; the lower furnace shell is provided with an annular inverted conical lower fire outlet wall; the lower fire outlet wall is spaced below the upper fire outlet wall; the upper fire outlet wall has a plurality of spiral upper fire outlet grooves, and the lower fire outlet wall has a plurality of spiral lower fire outlet grooves; the partition plate is provided between the upper fire outlet wall and the lower fire outlet wall, and both the upper fire outlet grooves and the lower fire outlet grooves are in communication with the gas mixing chamber.

[0008] Optionally, the furnace lower shell further includes an inner ring wall, and the lower fire outlet wall is disposed above the inner ring wall.

[0009] Optionally, the outer edge of the partition plate is provided with a plurality of lower edge retaining parts, which can be engaged with the wall surface of the inner ring wall.

[0010] Optionally, the inner edge of the partition plate is provided with an inner locking part, which can be locked onto the inner edge of the lower wall of the flame outlet.

[0011] Optionally, the partition plate is also provided with a "U"-shaped flame divider groove; the flame divider groove is located near the gas outlet end of the ejector tube.

[0012] Optionally, the fire-dividing groove is provided with a plurality of fire-dividing holes spaced apart.

[0013] Optionally, the upper and lower fire outlet slots are arranged alternately.

[0014] Optionally, the outer edge of the upper shell of the furnace is provided with an upper shell skirt plate, and the outer edge of the lower shell of the furnace is provided with a lower shell skirt plate; the upper shell skirt plate and the lower shell skirt plate are fitted together.

[0015] Optionally, the upper shell skirt plate and the lower shell skirt plate are connected by riveting or welding.

[0016] Optionally, the ejector tube is configured as a Venturi tube.

[0017] The beneficial effects of this invention are as follows: The annular inverted conical flame outlet wall design of the upper and lower furnace shells, combined with the staggered distribution of spiral upper and lower flame outlet grooves, forms a double-layered swirling flame supply path. After the gas and air are fully mixed in the mixing chamber, they form a swirling flame through the spiral grooves, significantly improving the secondary mixing efficiency of the gas and air, resulting in more complete combustion. The swirling combustion mode of the spiral flame outlet grooves can expand the flame coverage area, reduce local high-temperature concentration, achieve uniform temperature distribution in the combustion zone, and avoid uneven heating of the cookware. The partition plate further optimizes airflow distribution, suppresses the risk of flame backfire or flame detachment, and ensures a stable and reliable combustion process.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of the high-efficiency sheet metal furnace head of this utility model;

[0021] Figure 2 for Figure 1 Exploded view of a medium-to-high efficiency sheet metal furnace head;

[0022] Figure 3 for Figure 1 Cross-sectional view of a medium-to-high efficiency sheet metal furnace head.

[0023] Explanation of key component symbols:

[0024] 10. Upper furnace shell; 11. Upper flame outlet wall; 12. Upper flame outlet groove; 13. Upper shell skirt plate; 20. Lower furnace shell; 21. Lower flame outlet wall; 22. Lower flame outlet groove; 23. Inner ring wall; 24. Lower shell skirt plate; 30. Divider plate; 31. Lower edge retaining part; 32. Inner retaining part; 33. Flame distribution baffle groove; 34. Flame distribution hole; 40. Mixing chamber; 50. Injector tube. Detailed Implementation

[0025] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0026] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0028] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0029] Example

[0030] Reference Figures 1 to 3 The present invention proposes a high-efficiency sheet metal furnace head, comprising: an upper furnace shell 10, a lower furnace shell 20, and a partition plate 30 made of stainless steel sheet metal.

[0031] The upper shell 10 of the furnace is assembled with the upper shell 10 of the furnace to form the main body of the furnace head. The main body of the furnace head includes a mixing chamber 40 and an ejector tube 50 connected to each other. The mixing chamber 40 is arranged in an annular shape.

[0032] The upper shell 10 of the furnace is provided with an annular inverted conical upper fire outlet wall 11; the lower shell 20 of the furnace is provided with an annular inverted conical lower fire outlet wall 21; the lower fire outlet wall 21 is spaced below the upper fire outlet wall 11; the upper fire outlet wall 11 has a plurality of spiral upper fire outlet grooves 12, and the lower fire outlet wall 21 has a plurality of spiral lower fire outlet grooves 22; the partition plate 30 is provided between the upper fire outlet wall 11 and the lower fire outlet wall 21, and both the upper fire outlet grooves 12 and the lower fire outlet grooves 22 are connected to the mixing chamber 40.

[0033] In this invention, the annular inverted conical flame outlet wall design of the upper furnace shell 10 and the lower furnace shell 20, combined with the staggered distribution of the spiral upper and lower flame outlet grooves 22, forms a double-layer swirling flame supply path. After the gas and air are fully mixed in the mixing chamber 40, they form a swirling flame through the spiral grooves, significantly improving the secondary mixing efficiency of the gas and air, resulting in more complete combustion. The swirling combustion mode of the spiral flame outlet grooves can expand the flame coverage area, reduce local high-temperature concentration, achieve uniform temperature distribution in the combustion area, and avoid uneven heating of the cookware. The partition plate 30 further optimizes the airflow distribution, suppresses the risk of flame backfire or flame detachment, and ensures a stable and reliable combustion process.

[0034] In this embodiment, the furnace lower shell 20 also includes an inner ring wall 23, and the flame outlet lower wall 21 is disposed above the inner ring wall 23. The inner ring wall 23 can constrain the gas flow path and avoid turbulence, while providing an installation reference for the partition plate 30 to ensure the precise alignment of the flame outlet slot and the mixing chamber 40, further improving the uniformity of gas distribution and combustion stability.

[0035] In this embodiment, the outer edge of the partition plate 30 is provided with a plurality of lower edge locking portions 31, which can be locked onto the wall surface of the inner ring wall 23. The lower edge locking portions 31 provided on the outer edge of the partition plate 30 engage with the inner ring wall 23 to achieve the locking and limiting of the partition plate 30. This structure can prevent the partition plate 30 from shifting due to thermal stress at high temperatures, ensure that the gas diversion paths of the upper and lower flame outlet slots 22 are always aligned, reduce the risk of gas leakage, and enhance the structural reliability.

[0036] Furthermore, the inner edge of the partition plate 30 is provided with an inner locking part 32, which can be locked onto the inner edge of the lower flame outlet wall 21. The inner locking part 32 of the inner edge of the partition plate 30 engages with the inner edge of the lower flame outlet wall 21, forming a double-layer fixed structure. This design further constrains the radial displacement of the partition plate 30, ensuring a uniform gap between it and the flame outlet wall, optimizing the gas diversion effect, and avoiding backfire or flameout caused by uneven airflow.

[0037] In this embodiment, the partition plate 30 is also provided with a "U"-shaped flame distribution groove 33; the flame distribution groove 33 is located near the gas outlet end of the ejector tube 50. The "U"-shaped structure of the flame distribution groove 33 is located near the gas outlet end of the ejector tube 50, which can buffer and guide the high-speed gas, preventing the gas from rushing into the flame outlet groove near the gas outlet end of the ejector tube 50. Instead, the gas can diffuse towards the mixing chamber 40 and then evenly supply flame to each flame outlet groove.

[0038] Furthermore, the flame distribution groove 33 is provided with a number of spaced flame distribution holes 34. The spaced flame distribution holes 34 on the flame distribution groove 33 can divide the gas flow into multiple fine streams, which can reduce the direct impact of gas from the injector tube 50 into the flame outlet groove at the gas outlet end, making the gas flow in the flame outlet groove more stable.

[0039] In this embodiment, the upper flame outlet 12 and the lower flame outlet 22 are arranged alternately. The alternating arrangement of the upper and lower flame outlets 22 forms a double-layer spiral flame, expanding the flame coverage area. The upper and lower flames complement each other in space, achieving a three-dimensional distribution of heat, reducing the heat accumulation problem of traditional single-layer direct-injection flame holes, and is especially suitable for cookware of different shapes, improving heating efficiency and energy utilization.

[0040] In this embodiment, an upper shell skirt plate 13 is provided on the outer edge of the upper shell 10, and a lower shell skirt plate 24 is provided on the outer edge of the lower shell 20; the upper shell skirt plate 13 and the lower shell skirt plate 24 are fitted together. The outer edges of the upper shell 10 and the lower shell 20 are connected by the upper shell skirt plate 13 and the lower shell skirt plate 24 to form a sealed cavity. This structure simplifies the assembly process, avoids deformation problems caused by traditional welding or riveting, and enhances the overall rigidity of the furnace head, reducing the risk of shell cracking under high-temperature conditions.

[0041] Specifically, the upper shell skirt plate 13 and the lower shell skirt plate 24 are connected by riveting or welding.

[0042] In this embodiment, the ejector tube 50 is configured as a Venturi tube. The ejector tube 50 employs a Venturi tube structure, utilizing its gradually converging and expanding flow channel characteristics to create a negative pressure effect at the intake end. This design can actively draw in more air, significantly improving the initial mixing ratio of fuel gas and air, reducing dependence on external gas supply equipment such as fans, and enhancing the adaptability of the combustion system.

[0043] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A high-efficiency sheet metal furnace head, characterized in that, include: The furnace upper shell (10), furnace lower shell (20), and partition plate (30) are made of stainless steel sheet metal. The upper shell (10) and the upper shell (10) are assembled to form the main body of the furnace head. The main body of the furnace head includes a mixing chamber (40) and an ejector tube (50) connected to each other. The mixing chamber (40) is arranged in an annular shape. The upper shell (10) of the furnace is provided with an annular inverted conical upper fire outlet wall (11); the lower shell (20) of the furnace is provided with an annular inverted conical lower fire outlet wall (21); the lower fire outlet wall (21) is spaced below the upper fire outlet wall (11); the upper fire outlet wall (11) is provided with a plurality of spiral upper fire outlet grooves (12), and the lower fire outlet wall (21) is provided with a plurality of spiral lower fire outlet grooves (22); the partition plate (30) is provided between the upper fire outlet wall (11) and the lower fire outlet wall (21), and the upper fire outlet grooves (12) and the lower fire outlet grooves (22) are both connected to the mixing chamber (40).

2. The high-efficiency sheet metal furnace head according to claim 1, characterized in that: The furnace lower shell (20) also includes an inner ring wall (23), and the fire outlet lower wall (21) is disposed above the inner ring wall (23).

3. The high-efficiency sheet metal furnace head according to claim 2, characterized in that: The outer edge of the partition plate (30) is provided with a plurality of lower edge locking parts (31), which can be locked onto the wall surface of the inner ring wall (23).

4. The high-efficiency sheet metal furnace head according to claim 3, characterized in that: The inner edge of the partition plate (30) is provided with an inner locking part (32), which can be locked onto the inner edge of the lower fire outlet wall (21).

5. The high-efficiency sheet metal furnace head according to claim 2, characterized in that: The partition plate (30) is also provided with a "U"-shaped flame divider groove (33); the flame divider groove (33) is provided near the gas outlet end of the ejector tube (50).

6. The high-efficiency sheet metal furnace head according to claim 5, characterized in that: The fire divider groove (33) has a number of fire divider holes (34) spaced apart.

7. The high-efficiency sheet metal furnace head according to claim 1, characterized in that: The upper fire outlet groove (12) and the lower fire outlet groove (22) are arranged alternately.

8. The high-efficiency sheet metal furnace head according to claim 1, characterized in that: The outer edge of the upper shell (10) of the furnace is provided with an upper shell skirt plate (13), and the outer edge of the lower shell (20) of the furnace is provided with a lower shell skirt plate (24); the upper shell skirt plate (13) and the lower shell skirt plate (24) are fitted together.

9. The high-efficiency sheet metal furnace head according to claim 8, characterized in that: The upper shell skirt plate (13) and the lower shell skirt plate (24) are connected by riveting or welding.

10. The high-efficiency sheet metal furnace head according to claim 1, characterized in that: The ejector tube (50) is configured as a Venturi tube.

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