A burner and gas stove

Abstract

The utility model discloses a burner, include: furnace head, inner fire cover and outer fire cover, the center shell and the peripheral shell all have at least one lower hole post in each half respectively, and the inner fire cover and the outer fire cover all have the upper hole post of the butt joint with the part of respective corresponding lower hole post, and a group of lower hole post and upper hole post of corresponding butt joint are configured as: the hole of one of the two is the blind hole with internal thread, and the hole of the other is through -hole, and the two are fixedly connected by the fastener of throughing through the through -hole and the blind hole, having external thread and the internal thread cooperation of blind hole. The utility model discloses still disclosed the gas -cooker with the burner. The utility model has the beneficial effect that can effectively avoid the situation that the inner fire cover and the outer fire cover are easy to loosen even fall off, ensure the sealing property of the burner and avoid gas leakage.

Description

Technical Field

[0001] This utility model relates to a burner and a gas stove, and is an optimized design for burners that are prone to loosening and gas leakage. Background Technology

[0002] In the burner structure of existing kitchen gas stoves, a basic configuration consisting of a burner head, an outer burner cap, and an inner burner cap is commonly used. The outer burner cap and the inner burner cap are usually installed on the burner head in a simple snap-fit ​​manner, and their relative positions are maintained by gravity or a snap-fit ​​structure.

[0003] This connection method has significant drawbacks in actual long-term use: the outer and inner burner caps are prone to loosening or even falling off after prolonged use. Furthermore, under long-term high-temperature conditions, thermal deformation can occur, causing gaps to form between them and the burner head, which can damage the sealing of the outer and inner gas chambers, resulting in a risk of gas leakage. This not only reduces combustion efficiency but also poses a safety hazard. Utility Model Content

[0004] The purpose of this invention is to provide a burner and a gas stove that can effectively prevent the inner and outer burner caps from loosening or even falling off, thus ensuring the burner's sealing performance and preventing gas leakage.

[0005] This utility model is achieved through the following technical solution.

[0006] A burner includes: a burner head, an inner burner cap, and an outer burner cap. The central portion of the burner head has a central shell that engages with the inner burner cap and together defines an inner combustion chamber, and the peripheral portion has a peripheral shell that engages with the outer burner cap and together defines an outer combustion chamber. Both the central shell and the outer shell have at least one lower hole post. The inner flame cap and the outer flame cap each have an upper hole post that connects to their respective lower hole posts. The corresponding set of lower and upper hole posts are configured such that one of them is a blind hole with internal threads and the other is a through hole. The two are fixedly connected by fasteners that pass through the through hole and the blind hole in sequence, have external threads, and engage with the internal threads of the blind hole.

[0007] As a further improvement of this utility model, the lower hole columns corresponding to the central shell and the outer shell are all configured such that their holes are through holes. The upper hole posts corresponding to both the inner and outer flame caps are configured such that their holes are blind holes with internal threads.

[0008] As a further improvement of this utility model, the outer shell portion of the central housing defining the outer wall of the internal combustion chamber and the corresponding lower hole post are integrally connected, and the protrusion of the lower hole post relative to the outer shell portion is adapted to form a portion of the hole on the lower hole post and another portion on the outer shell portion.

[0009] As a further improvement of this utility model, the inner shell portion of the outer casing defining the inner wall of the outer gas chamber and the outer shell portion of the central casing are connected by a positioning bridge that allows the ignition needle to pass through and defines its position. The portion of the positioning bridge connected to the outer shell portion of the central casing has a portion of the hole corresponding to the lower hole post.

[0010] As a further improvement of this utility model, the lower hole column corresponding to the central shell has at least a portion of its surface in contact with the gas as an arc surface suitable for guiding the flow of gas.

[0011] As a further improvement of this utility model, a lower hole column corresponding to the central shell is provided, and the arrangement position of the lower hole column in the central shell is located at the farthest end of the gas flow path in the internal gas chamber defined by the first air inlet of the central shell.

[0012] As a further improvement of this utility model, the outer shell defines the inner shell portion of the outer gas chamber wall and the corresponding lower hole column are integrally connected, and the degree of protrusion of the lower hole column relative to the inner shell portion is suitable for its hole to be completely formed on the lower hole column.

[0013] As a further improvement of this utility model, the lower hole column corresponding to the outer shell has at least a portion of its surface in contact with the gas as an arc surface suitable for guiding the flow of gas.

[0014] As a further improvement of this utility model, the outer casing is provided with a corresponding lower hole column at least downstream of the gas flow near the second air inlet.

[0015] A gas stove, including a burner.

[0016] The burner of this utility model achieves rigid fixation between the inner burner cap and the central shell, and between the outer burner cap and the outer shell, through the threaded fastening connection between the upper and lower bore pins. This completely eliminates the loosening and falling off of the burner cap caused by high-temperature deformation or mechanical vibration, thereby ensuring the long-term sealing of the inner and outer gas chambers and eliminating the risk of gas leakage. Attached Figure Description

[0017] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein: Figure 1 This is a schematic diagram of the burner from one perspective; Figure 2 This is a schematic diagram of the burner structure from another perspective; Figure 3 This is a schematic diagram of the burner from one perspective (separating the inner and outer burner caps from the furnace body). Figure 4 This is a schematic diagram of the burner from another perspective (separating the inner and outer burner caps from the furnace body). Figure 5 This is a schematic diagram of the central shell structure. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0020] Implementation Case 1: This embodiment illustrates a burner that can prevent the burner cap from loosening and falling off, and prevent gas leakage. (Refer to...) Figures 1-5The burner includes a burner head 1, an inner burner cap 21, and an outer burner cap 22. A central housing 11 is located at the center of the burner head 1, which interlocks with the inner burner cap 21, together defining an internal combustion chamber r1. An outer housing 12 is located at the periphery of the burner head 1, which interlocks with the outer burner cap 22, together defining an external combustion chamber r2. To ensure a secure connection, the inner surfaces of both the central housing 11 and the outer housing 12 are each formed with at least one lower post 31, which is part of the housing structure. Correspondingly, the inner burner cap 21 has an upper post 32 formed opposite the lower post 31 of the central housing 11, and the outer burner cap 22 also has an upper post 32 formed opposite the lower post 31 of the outer housing 12. Each pair of corresponding lower posts 31 and upper posts 32 is structurally configured such that one post is a blind hole with internal threads, and the other is a through hole. By using threaded fasteners 33 (such as screws or bolts), which are sequentially passed through the through holes and screwed into the blind holes, the threads engage, thus firmly fixing the upper post 32 and the lower post 31 together. This direct mechanical fixing method significantly improves the connection strength and stability between the central housing 11 and the inner burner cap 21, and between the outer housing 12 and the outer burner cap 22. It effectively avoids loosening or even detachment caused by long-term use, high-temperature deformation, or vibration, thereby ensuring the sealing of the inner combustion chamber r1 and the outer combustion chamber r2, preventing gas leakage from these connection points, and improving operational safety.

[0021] In this embodiment, the lower bore posts 31 corresponding to the central shell 11 and the outer shell 12 of the burner are all configured as through holes, meaning the holes penetrate the entire structure of the lower bore post 31. Simultaneously, the upper bore posts 32 corresponding to the inner burner cap 21 and the outer burner cap 22 are all configured as blind holes with internal threads, meaning the holes form threads internally but do not penetrate the entire upper bore post 32. During assembly, fasteners 33 pass sequentially through the through holes of the lower bore posts 31 from below the burner head 1, and then are screwed into and secured in the internal threads of the blind holes of the upper bore posts 32. Thus, the exposed tail of the fastener 33 is located at the bottom of the burner head 1 and does not protrude from the outer surface of the inner burner cap 21 or the outer burner cap 22. This design keeps the outer surfaces of the inner burner cap 21 and the outer burner cap 22 intact, flat and smooth. This not only enhances the aesthetic appearance of the product, but more importantly, it eliminates the potential for oil stains, food residue or water stains to accumulate due to the unevenness of the tail of the fastener 33. This makes the burner cap surface easier to clean and wipe, and keeps it hygienic for a long time.

[0022] In this embodiment, the outer shell 111 defining the outer wall of the internal combustion chamber r1 and its corresponding lower hole post 31 are integrally formed by casting or other processes. The degree of protrusion of the lower hole post 31 relative to the surface of the outer shell 111, i.e., the thickness of the protrusion, is such that a portion of the hole structure on the lower hole post 31 is formed on the protruding portion of the lower hole post 31 relative to the outer shell 111, while the other portion of the hole is formed on the body structure of the outer shell 111. Together, they constitute a complete hole channel. This design takes into account the specific structural morphology of the internal combustion chamber r1: the internal combustion chamber r1 is a relatively narrow annular combustion flow channel. By integrating a portion of the hole into the body of the outer shell 111, the volume and width occupied by the protruding portion of the lower hole post 31 in the internal space of the internal combustion chamber r1 can be significantly reduced, thereby minimizing the encroachment of the lower hole post 31 structure on the effective flow section of the internal combustion chamber r1. This design optimizes the space utilization of the internal gas chamber r1, ensuring that the gas can flow more smoothly and efficiently within this narrow annular channel, reducing flow resistance and maintaining good gas distribution performance.

[0023] In this embodiment, a positioning bridge 13 connects the inner shell portion 121 of the outer casing 12 defining the inner wall of the external gas chamber r2 and the outer shell portion 111 of the central casing 11. This positioning bridge 13 not only connects the two casings but also has a channel or positioning structure (such as a hole or slot 131) that allows the ignition needle to pass through, enabling precise fixation of the ignition needle's position and angle. It is noteworthy that the portion of the positioning bridge 13 that connects to the outer shell portion 111 of the central casing 11 corresponds to a portion of the lower hole post 31. That is, the structural form of this connection portion integrates with the area on the outer shell portion 111 where the hole is formed; in other words, the structure at this location supports and participates in the formation of the channel. This integrated design gives the positioning bridge 13 a dual function: on the one hand, it provides a stable and reliable positioning support for the core ignition needle, ensuring the accuracy and reliability of each ignition; on the other hand, since the area where the lower hole post 31 is formed on the outer casing 111 is relatively thin, the connection of the positioning bridge 13 at this point plays a role in enhancing and reinforcing the structural strength of this local area, enabling it to better withstand heat loads, gas pressures and possible mechanical stresses, thereby improving the overall structural stability and durability.

[0024] In this embodiment, the lower orifice column 31 corresponding to the central shell 11 has its surface directly facing the gas flow channel within the internal gas chamber r1. At least a portion of this surface (i.e., the surface in contact with the flowing gas) is machined or cast into a smooth arc shape. The curvature design of this arc surface takes into account the direction of gas flow, aiming to provide better fluid guidance. Since the structure of the lower orifice column 31 inevitably occupies part of the flow width of the internal gas chamber r1 (a narrow annular cavity), it causes some interference and resistance to gas flow. This arc surface design, by providing a continuous, smooth, and transitional surface without sharp turns, effectively guides the gas flow through the area surrounding the lower orifice column 31, significantly reducing turbulence, eddies, and frictional resistance generated during gas flow. This weakens the negative impact of the lower orifice column 31 on the gas flow efficiency within the internal gas chamber r1, helping to maintain smooth flow and uniform distribution of gas within the annular cavity.

[0025] In this embodiment, the central housing 11 has only one lower orifice column 31. The position of this single lower orifice column 31 within the internal combustion chamber r1 is optimized, positioned at the farthest point of the gas flow path defined by the first air inlet 11a of the central housing 11. Specifically, the internal combustion chamber r1 is an annular sealed cavity. After the gas enters through the first air inlet 11a of the central housing 11, it splits into two streams, flowing clockwise and counterclockwise along the annular cavity r1, respectively, and finally converging on the other side of the annular cavity (i.e., the farthest point of the flow path). This farthest point is typically the point on the opposite side of the annular cavity furthest from the first air inlet 11a. By precisely positioning the unique lower orifice column 31 with a specific volume at this natural confluence point (the farthest point) of the gas flow path, its interference with the main gas flow path can be minimized. Because the gas only encounters this structural obstacle after flowing through most of the annular path, its flow state is relatively stable, and the flow path ends after this confluence point (entering the fire hole area). Therefore, the flow resistance caused by the lower hole column 31 to the mainstream gas flow and the adverse effects on the uniformity of gas distribution are controlled to a minimum, achieving the best balance between structural requirements and fluid performance.

[0026] In this embodiment, the inner shell portion 121 of the outer shell 12, which defines the inner wall of the external gas chamber r2, and its corresponding lower hole column 31 are also integrally formed by casting or other processes. Unlike the design of the lower hole column 31 of the central shell 11, the lower hole column 31 of the outer shell 12 is designed to be thicker in terms of protrusion relative to the surface of the inner shell portion 121. The purpose of this design is to ensure that the hole structure (whether it is a through hole or the main part constituting a blind hole) is completely formed inside the protruding lower hole column 31 structure, and the hole wall is entirely made of the material of the lower hole column 31, without needing to extend to or rely on the structure of the inner shell portion 121 body to form the channel. This design choice is based on the structural characteristics of the external gas chamber r2: the external gas chamber r2 is also an annular cavity, but its width is usually significantly larger than that of the internal gas chamber r1, providing more space. Therefore, even though the lower hole column 31 occupies a certain cavity space with a larger protrusion, its impact on the overall flow efficiency of gas in the external gas chamber r2 is relatively small and acceptable. By placing the hole completely inside the lower hole post 31, the need to open the inner shell 121 body or weaken its structural strength is avoided, ensuring the integrity and mechanical strength of the inner shell 121 as the main supporting structure of the outer shell 12, which is conducive to maintaining the overall stability and durability of the outer shell 12.

[0027] In this embodiment, the lower orifice column 31 corresponding to the outer casing 12 has its surface directly facing the gas flow channel inside the external gas chamber r2. At least a portion of this surface in contact with the gas is designed as a smooth, curved shape. Similarly, this curved surface aims to optimize the hydrodynamic characteristics of the gas flow through the area surrounding the lower orifice column 31. Although the external gas chamber r2 is relatively wide and the flow resistance caused by the lower orifice column 31 is relatively small, this curved surface design can still further guide the gas flow, reduce unnecessary local flow losses (such as eddies and separation flows), and ensure that the gas flows more smoothly and is more evenly distributed to each burner hole within the external gas chamber r2, thereby improving combustion efficiency and stability.

[0028] In this embodiment, the lower orifice column 31 corresponding to the outer casing 12 is positioned with specific considerations. Multiple ejector tubes 14 (commonly two) are typically connected to the outer casing 12, and the interfaces of these ejector tubes 14 on the outer casing 12 constitute the second air inlet 12a of the external gas chamber r2. When the gas is injected at high speed from the relatively narrow channel of the ejector tube 14 into the relatively wide space of the external gas chamber r2, the velocity, pressure, and flow state of the fluid undergo a drastic change (abrupt change). This abrupt change in flow state will generate significant turbulence, vortices, and pressure fluctuations in the downstream region near the outlet of the second air inlet 12a (i.e., the region of the outer casing 12 immediately adjacent to the injection direction of the second air inlet 12a). This abrupt change in fluid dynamics will exert additional, dynamically changing forces on this region of the outer casing 12, which, under long-term action, may cause this region to become a structural weak point, prone to vibration, fatigue, or even microcracks. By arranging one or more lower perforated columns 31 (and correspondingly fastening them to the upper perforated columns 32) at least near the downstream of the gas flow of each second inlet 12a, these lower perforated columns 31 and their fasteners 33 form a reinforced connection point and localized strengthening structure in this critical area. This arrangement effectively enhances the structural stiffness and strength of the outer casing 12 in the region of abrupt changes in gas flow (the weak point downstream of the second inlet 12a), resisting vibrations and alternating stresses caused by sudden changes in gas flow, reducing the risk of damage to this area due to long-term stress, and improving the overall structural reliability and service life of the burner.

[0029] Implementation Case 2: This implementation example illustrates a gas stove, referring to... Figures 1-5 This gas stove incorporates the burner described in Embodiment 1. The burner is integrated into the main structure of the gas stove and connected to the gas supply system via a standard gas pipe interface. Because the burner employs the robust connection structure shown in Embodiment 1—comprising the burner head 1, inner burner cap 21, outer burner cap 22, and the upper and lower perforated columns 31 and fasteners 33—including features such as the optimized design of the lower perforated column 31 for the narrow structure of the inner gas cavity r1, the integrated function of the positioning bridge 13, the optimized arc surface of the lower perforated column 31 in key areas, and the reinforced arrangement of the lower perforated column 31 in areas of rapid fluid change, this gas stove fundamentally solves key safety issues in existing technologies, such as the loosening and detachment of the inner / outer burner cap 22 due to high-temperature deformation, long-term use, or vibration, and the resulting gas leakage from the inner / outer gas cavity. Simultaneously, it ensures smooth flow and uniform distribution of gas within the cavity, improving combustion efficiency. Ultimately, this gas stove boasts higher safety performance, a longer service life, and more stable combustion.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A burner, characterized in that, include: The burner head (1), inner fire cover (21) and outer fire cover (22) have a central shell (11) that engages with the inner fire cover (21) and together defines the inner gas chamber (r1), and an outer shell (12) that engages with the outer fire cover (22) and together defines the outer gas chamber (r2). The central housing (11) and the outer housing (12) each have at least one lower hole post (31). The inner fire cover (21) and the outer fire cover (22) each have an upper hole post (32) connected to the lower hole post (31) at their respective corresponding positions. The corresponding set of lower hole posts (31) and upper hole posts (32) are configured such that one of them is a blind hole with internal threads and the other is a through hole. The two are fixedly connected by fasteners (33) that pass through the through hole and the blind hole in sequence, have external threads and engage with the internal threads of the blind hole.

2. The burner according to claim 1, characterized in that, The lower hole column (31) corresponding to the central shell (11) and the outer shell (12) are each configured such that its hole is a through hole; The upper hole post (32) corresponding to the inner fire cover (21) and the outer fire cover (22) are each configured such that the hole is a blind hole with internal thread.

3. The burner according to claim 1, characterized in that, The central housing (11) defines the outer shell portion (111) of the outer wall of the internal combustion chamber (r1) and the corresponding lower hole post (31) integrally connected, and the protrusion of the lower hole post (31) relative to the outer shell portion (111) is adapted to form a portion of its hole on the lower hole post (31) and another portion on the outer shell portion (111).

4. The burner according to claim 1, characterized in that, The outer shell (12) defines the inner shell portion (121) of the inner wall of the outer gas chamber (r2) and the outer shell portion (111) of the central shell (11) and are connected by a positioning bridge (13) that allows the ignition needle to pass through and defines its position. The portion of the positioning bridge (13) connected to the outer shell portion (111) of the central shell (11) has a portion of a hole corresponding to the lower hole post (31).

5. The burner according to claim 4, characterized in that, The lower bore post (31) corresponding to the central housing (11) has at least a portion of its surface in contact with the gas as an arc surface suitable for guiding the flow of the gas.

6. The burner according to claim 4, characterized in that, The central housing (11) is provided with one lower hole column (31), and the lower hole column (31) is located at the farthest end of the gas flow path in the internal gas chamber (r1) defined by the first air inlet (11a) of the central housing (11).

7. The burner according to claim 1, characterized in that, The outer shell (12) defines the inner shell portion (121) of the inner wall of the external gas chamber (r2) and the corresponding lower hole post (31) integrally connected, and the protrusion of the lower hole post (31) relative to the inner shell portion (121) is adapted to make its hole completely formed on the lower hole post (31).

8. The burner according to claim 7, characterized in that, The lower hole column (31) corresponding to the outer shell (12) has at least a portion of its surface in contact with the gas as an arc surface suitable for guiding the flow of gas.

9. The burner according to claim 7, characterized in that, The outer casing (12) has a corresponding lower orifice (31) arranged at least downstream of the gas flow near its second air inlet (12a).

10. A gas stove, characterized in that, Includes the burner according to any one of claims 1-9.

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