Enamel inner container and steaming oven

Abstract

The utility model provides an enamel inner container and a steaming oven, the enamel inner container comprises a cylindrical inner container body, the front end of the inner container body is provided with an opening, and the rear end of the inner container body is provided with a rear plate; a welding support is arranged at the front end of the inner container body. A plurality of protruding points protruding towards the inner container body are arranged on the welding face, facing the inner container body, of the welding support, and the welding support and the inner container body are welded through the protruding points. According to the enamel inner container and the steaming oven, the problem of enamel explosion in a welding area of the enamel inner container can be solved, and the service life of a product is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to an enamel inner liner and a steam oven. Background Technology

[0002] As a core piece of equipment in modern kitchens, steam ovens must withstand the alternating effects of high-temperature baking (typically above 200℃) and high-humidity steam (100℃ saturated steam) in their inner cavity. Currently, mainstream products on the market use stainless steel or enamel inner cavities, with enamel inner cavities gradually becoming the preferred choice for high-end products due to their corrosion resistance, ease of cleaning, and aesthetic appeal. However, the manufacturing process of enamel inner cavities presents the following technical challenges:

[0003] 1. Welding Enamel Cracking Issue: The inner liner needs to be connected to the outer shell (such as the front frame, upper plate, lower plate, and left and right side plates) via welding brackets. During the welding process, the high temperature heat input causes thermal stress in the metal brackets and the inner liner. The resulting weld points are uneven, and the flatness cannot be restored after grinding, affecting the adhesion and sealing of the enamel layer.

[0004] 2. Defects in the support structure: Existing supports mostly adopt single-point welding or continuous welding design, resulting in concentrated welding areas and uneven stress distribution, which further exacerbates the risk of porcelain breakage.

[0005] The aforementioned problems result in low yield rates, short service lives, and high maintenance costs for enamel liners, limiting their large-scale application in steam ovens.

[0006] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0007] The purpose of this utility model is to provide an enamel liner that can solve the problem of enamel cracking in the welding area of ​​the enamel liner and extend the service life of the product.

[0008] Another objective of this utility model is to provide a steam oven that includes the aforementioned enamel inner liner, which can solve the problem of enamel cracking in the welded area of ​​the enamel inner liner and extend the product's service life.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An enamel liner includes a cylindrical liner body with an opening at the front end and a rear plate at the rear end; a welding bracket is provided at the front end of the liner body; the welding surface of the welding bracket facing the liner body has a plurality of protrusions protruding towards the liner body, and the welding bracket is welded to the liner body through the protrusions.

[0011] According to one embodiment of the present invention, the cross-section of the welding bracket is shaped like the letter "Z", and the protrusions are provided on both sides of the welding bracket facing the welding surface of the inner liner body.

[0012] According to one embodiment of the present invention, the surface of the protrusion is an arc surface.

[0013] According to one embodiment of the present invention, a buffer notch is provided between the two protrusions.

[0014] According to one embodiment of the present invention, the surface of the welding bracket is provided with buffer holes.

[0015] According to one embodiment of the present invention, the welding brackets are provided at the top, bottom and both sides of the front end of the inner liner body.

[0016] According to one embodiment of the present invention, mounting plates are provided on the top, bottom and both sides of the rear plate.

[0017] According to one embodiment of the present invention, the inner liner body and the welding bracket are provided with an enamel layer on the outside.

[0018] This utility model also provides a steam oven, including an outer shell and the above-mentioned enamel inner liner; the front inner side of the outer shell is provided with a front fixing plate corresponding to the welding bracket, and the front fixing plate is fixedly connected to the welding bracket.

[0019] According to one embodiment of the present invention, the top, bottom and both sides of the rear plate are provided with mounting plates, and the rear inner side of the outer shell is provided with a rear fixing plate corresponding to the mounting plate, and the rear fixing plate is fixedly connected to the mounting plate.

[0020] Compared with the prior art, the advantages and beneficial effects of the embodiments of this utility model are as follows:

[0021] The enamel-lined inner liner and steam oven provided in this embodiment of the invention have multiple protrusions on the welding surface of the welding bracket facing the inner liner body. The welding bracket and the inner liner body are welded together by protrusion welding, resulting in a high degree of flatness at the welding position. This improves the adhesion and sealing of the subsequent enamel layer, solving the problem of enamel cracking at the weld points after the inner liner body is enamel-lined. In addition, the welding bracket and the inner liner body are welded at multiple points, resulting in a dispersed welding area and uniform stress distribution, further reducing the risk of enamel cracking and extending the product's service life. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an undue limitation of this utility model. Wherein:

[0023] Figure 1 This is a schematic diagram of the structure of the enamel inner liner provided in an embodiment of the present utility model;

[0024] Figure 2 A schematic diagram of the enamel inner liner from another angle provided in an embodiment of this utility model;

[0025] Figure 3 A schematic diagram of the structure of the welding bracket for the enamel inner liner provided in this embodiment of the utility model;

[0026] Figure 4 This is a front view of the welding bracket for the enamel inner liner provided in an embodiment of the present utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Inner liner body; 11. Rear panel; 12. Mounting plate; 2. Welded bracket; 21. Protrusion; 22. Buffer notch; 23. Buffer hole; 3. Front frame; 4. Front fixing plate. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0030] In the description of this utility model, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0031] like Figures 1-4 As shown, this embodiment of the utility model provides an enamel inner liner, including a cylindrical inner liner body 1. The front end of the inner liner body 1 has an opening, and the rear end of the inner liner body 1 is provided with a rear plate 11. The front end of the inner liner body 1 is provided with a welding bracket 2. The welding bracket 2 has a plurality of protrusions 21 facing the welding surface of the inner liner body 1. The welding bracket 2 and the inner liner body 1 are welded through the protrusions 21, that is, welded by protrusion welding.

[0032] The enamel-lined inner liner provided in this embodiment of the invention has multiple downward-protruding dots 21 on the bottom surface of the welding bracket 2 (facing the welding surface of the inner liner body 1). The welding bracket 2 and the inner liner body 1 are welded together by dot welding, resulting in a high degree of flatness at the welding position. This improves the adhesion and sealing of the subsequent enamel layer, solving the problem of enamel cracking at the weld points after the inner liner body is enamel-lined. Furthermore, the welding bracket 2 is then fixedly connected to the outer shell of the steam oven (e.g., by welding, bolting, etc.). The welding bracket 2 uses energy-storage dot welding, which ensures uniform heating and uniform weld points. In addition, the welding bracket 2 and the inner liner body 1 of this invention use multi-point welding, resulting in a dispersed welding area and uniform stress distribution, further reducing the risk of enamel cracking and extending the product's service life.

[0033] like Figures 3-4As shown, in one embodiment of this utility model, the cross-section of the welding bracket 2 is shaped like a "Z", and the protrusions 21 are provided on both sides of the welding bracket 2 facing the welding surface of the inner liner body 1. Further, the surface of the protrusions 21 is an arc surface. Preferably, the protrusions 21 are evenly distributed, and the size of the protrusions 21 is preferably a hemispherical shape with a diameter of 2mm and a height of 0.6mm, to ensure the welding firmness and the flatness after welding.

[0034] like Figure 3 As shown, in one embodiment of this utility model, a buffer notch 22 is provided between the two protrusions 21. The buffer notch 22 provided around the protrusion 21 (welding point) is a stress and heat release zone, which can absorb the stress generated by welding and thermal expansion, avoid stress acting directly on the enamel layer, and reduce the risk of enamel cracking. The setting of the buffer notch 22 helps to disperse stress concentration after welding the welding bracket 2, and at the same time helps to distribute heat evenly during enamel enamel lining, improve the stability of the enamel, and balance the thermal expansion and contraction of the inner liner body 1.

[0035] During the steaming and baking process, the inner cavity body 1 expands due to heat. The traditional welded support frame is rigidly connected to the outer shell of the steam oven, which cannot effectively absorb deformation stress, causing the enamel layer to peel off more quickly under long-term thermal cycling. To solve this problem, such as... Figure 3 As shown, in one embodiment of this utility model, the surface of the welding bracket 2 is provided with a buffer hole 23, which gives the welding bracket 2 a certain degree of deformability, allowing for a flexible connection between the inner liner body 1 and the outer shell of the steam oven. This effectively absorbs deformation stress, prevents the enamel layer from peeling off, and also prevents the weld points from cracking due to strong vibrations during transportation and drops. Furthermore, the buffer hole 23 can be in the shape of a square hole, an oblong hole, etc. The buffer hole 23 can be provided on the top surface and the side surface of the welding bracket 2.

[0036] like Figures 1-2 As shown, in one embodiment of the present invention, the inner liner body 1 is in the shape of a square tube, and the welding bracket 2 is provided at the top, bottom and both sides of the front end of the inner liner body 1 to ensure the stability of the front end of the inner liner body 1.

[0037] like Figures 1-2 As shown, in one embodiment of this utility model, the inner liner body 1 is cylindrical, the rear plate 11 is rectangular, and mounting plates 12 are provided on the top, bottom, and both sides of the rear plate 11. The inner liner body 1 can be fixedly connected to the outer shell of the steam oven through the mounting plates 12, which can ensure the connection strength, ensure the stability of the rear end of the inner liner body 1, and prevent the rear of the inner liner body 1 from being loosely fixed, swinging inside the machine, and tearing the front weld points due to shearing force.

[0038] Specifically, the inner liner body 1 and the welded bracket 2 are covered with an enamel layer (not shown in the figure). This enamel layer is produced using existing enamel-making processes, which will not be described in detail here. Through the above structural design, the rate of enamel breakage can be reduced to below 5% (compared to approximately 15-20% with traditional processes), the thermal deformation of the inner liner body 1 can be reduced by 60%, and its lifespan can be extended to more than 10 years. Furthermore, it is compatible with existing production lines, and the unit manufacturing cost remains unchanged.

[0039] In one embodiment of this utility model, the inner liner body 1 is composed of an inner liner U-shaped plate, an inner liner upper plate, and a rear plate welded together.

[0040] like Figures 1-2 As shown, this utility model also provides a steam oven, including an outer shell and the aforementioned enamel inner liner. Only the front frame 3 of the outer shell is shown in the figure, which is a rectangular plate and has an opening corresponding to the inner liner body 1. The front end (front frame 3) of the outer shell is provided with a front fixing plate 4 corresponding to the welding bracket 2. The front fixing plate 4 is fixedly connected to the welding bracket 2, for example, by welding, bolting, etc.

[0041] like Figures 1-2 As shown, in one embodiment of this utility model, mounting plates 12 are provided on the top, bottom, and both sides of the rear plate 11. A rear fixing plate (not shown in the figure) corresponding to the mounting plate is provided on the inner rear side of the outer shell. The rear fixing plate is fixedly connected to the mounting plate 12. The rear end of the inner liner body 1 is fixedly connected to the rear fixing plate inside the outer shell of the steam oven through the mounting plates 12, which can ensure the connection strength, ensure the stability of the rear end of the inner liner body 1, and prevent the rear part of the inner liner body 1 from being not firmly fixed, swinging inside the machine, and tearing the front weld point by shearing force.

[0042] The enamel-lined inner liner and steam oven provided by this utility model have the following advantages:

[0043] 1. It can reduce welding thermal stress: Through the design of the split welding bracket and the optimization of the welding point layout, local heat input is reduced and stress concentration is dispersed.

[0044] 2. Improves structural stability: By combining multi-point welding with rigid connections, the thermal expansion difference between the inner liner and the outer shell is balanced, preventing the enamel layer from cracking due to deformation stress.

[0045] 3. Improved process compatibility: It ensures that the optimized welding bracket structure is compatible with existing enamel coating processes without increasing manufacturing costs.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An enamel inner liner, characterized in that, It includes a cylindrical inner tank body (1), the front end of the inner tank body (1) has an opening, and the rear end of the inner tank body (1) is provided with a rear plate (11); a welding bracket (2) is provided at the front end of the inner tank body (1); the welding surface of the welding bracket (2) facing the inner tank body (1) is provided with a plurality of bumps (21) protruding towards the inner tank body (1), and the welding bracket (2) and the inner tank body (1) are welded through the bumps (21).

2. The enamel inner liner according to claim 1, characterized in that, The cross-section of the welding bracket (2) is in a shape of a capital letter "J", and the bumps (21) are provided on the welding surfaces of both sides of the welding bracket (2) facing the inner tank body (1).

3. The enamel inner liner according to claim 1 or 2, characterized in that, The surface of the bump (21) is an arc surface.

4. The enamel inner liner according to claim 1 or 2, characterized in that, A buffer notch (22) is provided between two of the bumps (21).

5. The enamel inner liner according to claim 1 or 2, characterized in that, Buffer holes (23) are provided on the surface of the welding bracket (2).

6. The enamel inner liner according to claim 1 or 2, characterized in that, The welding brackets (2) are provided at the top, bottom and both sides of the front end of the inner tank body (1).

7. The enamel inner liner according to claim 1 or 2, characterized in that, Mounting plates (12) are provided at the top, bottom and both sides of the rear plate (11).

8. The enamel inner liner according to claim 1 or 2, characterized in that, An enamel layer is provided outside the inner tank body (1) and the welding bracket (2).

9. A steam oven, characterized in that, It includes an outer shell and an enamel inner tank according to any one of claims 1 to 8; a front fixing plate (3) corresponding to the welding bracket (2) is provided on the inner side of the front end of the outer shell, and the front fixing plate (3) is fixedly connected to the welding bracket (2).

10. The steam oven according to claim 9, characterized in that, Mounting plates (12) are provided at the top, bottom and both sides of the rear plate (11), and a rear fixing plate corresponding to the mounting plate (12) is provided on the inner side of the rear end of the outer shell, and the rear fixing plate is fixedly connected to the mounting plate (12).

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