Inner container and liquid heating container

Abstract

The embodiment of the utility model provides an inner container and a liquid heating container, the inner container comprises an inner container side wall, the bottom of the inner container side wall is of an open structure; the inner container base plate comprises a bottom wall and a surrounding edge formed by extending upwards from the peripheral edge of the bottom wall, the bottom wall is arranged below the inner container side wall and blocks the open structure, the surrounding edge and a part of the structure below the inner container side wall are arranged in an overlapped mode, and the overlapped parts are connected in a welded mode; a welding area is formed at the welding connection part of the inner container side wall and the surrounding edge, the distance between the lower end of the welding area and the lower end of the inner container side wall is larger than or equal to 0.5 mm, and the distance between the upper end of the welding area and the upper end of the surrounding edge is larger than or equal to 0.5 mm. According to the inner container provided by the embodiment of the invention, the surrounding edge is overlapped with the partial structure below the inner container side wall and is connected with the partial structure below the inner container side wall in a welding manner, so that the periphery of a welding area can be protected by the thickness of the inner container side wall and the surrounding edge on the premise that the wall thickness of the inner container side wall and the inner container base plate is relatively thin, and the strength after welding is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of container, concretely relates to a liner and liquid heating container. BACKGROUND

[0002] The existing electric kettle liner is usually stainless steel material, is divided into kettle bottom and kettle wall, wherein the heating pipe is below the kettle bottom, and the kettle bottom is connected with the kettle wall through welding, along with the user's use experience requirement of product is higher and higher, the portability requirement of product use is also higher and higher, this requires us to reduce the thickness of the liner as much as possible under the condition of not affecting use, to reduce the weight of the whole product.

[0003] Due to the high temperature generated by conventional welding, there is a risk of welding through the welding part of the kettle bottom and the kettle wall with thinner wall thickness, and many poor welding parts are difficult to be found in the production process, which leads to the problem of liner leakage, and the wall thickness of the welding part is thin, which is easily affected by external force during assembly and use, and deformed, affecting the reliability of the product. SUMMARY

[0004] Therefore, the purpose of the utility model is to provide a liner to at least solve the problem of liner leakage caused by welding through and poor welding between the kettle bottom and the kettle wall in the related art.

[0005] The first aspect embodiment of the utility model provides a liner, which comprises: a liner side wall, the bottom of the liner side wall is an open structure; a liner bottom disc, the liner bottom disc comprises a bottom wall and a surrounding edge formed by extending upward from the outer peripheral edge of the bottom wall, the bottom wall is arranged below the liner side wall and blocks the open structure, the surrounding edge is arranged in overlapping with part of the structure below the liner side wall, and the overlapping part is welded and connected; the part of the liner side wall and the surrounding edge welded and connected forms a welding area, the distance between the lower end of the welding area and the lower end of the liner side wall is greater than or equal to 0.5mm, and the distance between the upper end of the welding area and the upper end of the surrounding edge is greater than or equal to 0.5mm.

[0006] The liner provided by the embodiment of the present aspect comprises a surrounding edge extending in the vertical direction, the surrounding edge is arranged in overlapping manner with the part of the structure below the inner wall of the liner, and the overlapping part is welded. Such arrangement can protect the welding area with the wall thickness of both the inner wall of the liner and the surrounding edge, so as to ensure that the liner can maintain high strength after welding. In addition, the welding position is arranged on the surrounding edge, so that the bottom wall of the liner bottom plate is not affected by welding, thereby maintaining the integrity of the bottom wall and ensuring the strength and stability of the liner bottom plate. The liner provided by the embodiment of the present aspect can ensure the reliability of welding and locally reinforce the welding position, thereby solving the problem of liner leakage caused by the risk of welding through of the welding position with thin wall thickness due to high temperature generated by welding in the related art, and solving the problem that the welding position with thin wall thickness is easily deformed by external force during assembly and use, thereby affecting the reliability of the product. In addition, the liner only needs to be welded once, thereby greatly improving the qualification rate and overall strength of the liner. Further, the distance between the lower end of the welding area and the lower end of the inner wall of the liner is greater than or equal to 0.5 mm, and the distance between the upper end of the welding area and the upper end of the surrounding edge is greater than or equal to 0.5 mm, so as to avoid the welding position being too close to the edges of the two overlapping positions of the lower end of the inner wall of the liner and the upper end of the surrounding edge, so that the welding area can not make full use of the characteristics of overlapping reinforcement, the liner is easily affected by the high temperature of welding, the liner is easily yellowed or rusted, and the use experience is not good.

[0007] In some embodiments, the surrounding edge is arranged outside the inner wall of the liner, and the inner wall of the surrounding edge is attached to the outer wall of the inner wall of the liner, and the two are welded together; or the inner wall of the liner is arranged outside the surrounding edge, and the inner wall of the inner wall of the liner is attached to the outer wall of the surrounding edge, and the two are welded together.

[0008] In some embodiments, part of the structure of the surrounding edge is bent to form a first bending part, the first bending part comprises a first step wall extending in the radial direction and a first extension side wall extending upward in the vertical direction, the width of the first step wall is substantially equal to the wall thickness of the inner wall of the liner, the lower end of the inner wall of the liner abuts against the first step wall, and the first extension side wall is arranged in overlapping manner with the part of the structure below the inner wall of the liner, and the overlapping part is welded. Such arrangement can limit the assembly of the inner wall of the liner and the surrounding edge by bending the surrounding edge, so as to facilitate welding, and in the case that the first step wall extends outward in the radial direction, the inner wall connection at the abutting position of the inner wall of the liner and the surrounding edge is smoother, so that the inner part of the liner after welding is smoother.

[0009] In some embodiments, the inner container side wall is partially bent to form a second bending part, the second bending part includes a second step wall extending in a radial direction and a second extension side wall extending downward in a vertical direction, the width of the second step wall is substantially equal to the wall thickness of the rim, the upper end of the rim abuts against the second step wall, the second extension side wall is arranged in overlap with the rim, and the overlapping part is welded. In this way, by bending the inner container side wall, the upper end of the rim abuts against the horizontal plane of the bent inner container side wall, i.e., the second step wall, which can limit the assembly of the inner container side wall and the rim, facilitate welding, and in the case that the second step wall extends outward in the radial direction, the inner wall connection at the abutting position of the inner container side wall and the rim is smoother, and the inner container after welding is smoother.

[0010] In some embodiments, the part of the inner container side wall and the rim welded together forms a welding area, and sealing silica gel is arranged in the welding area. In this way, filling the welding area with sealing silica gel can reduce the resonance between the inner container bottom disc and the inner container side wall during heating, buffer the resonance, and improve the user experience.

[0011] In some embodiments, a plurality of spaced welding points are arranged in the welding area, and the sealing silica gel seals the gap between the welding points. In this way, in the case that the welding area is filled with sealing silica gel, the welding of the welding area can also be discontinuous welding points, and the cooperation between the welding points and the sealing silica gel can reduce the resonance between the inner container bottom disc and the inner container side wall during heating, buffer the resonance and sealing functions, and improve the user experience.

[0012] In some embodiments, the wall thickness of the inner container side wall is greater than or equal to 0.25 mm and less than or equal to 0.5 mm. Within this range, on the one hand, the lightness of the inner container can be ensured, and the entire inner container will not be too heavy and inconvenient to use due to the excessive wall thickness of the inner container side wall. On the other hand, it can also avoid that the overlapping reinforced position is too weak, i.e., the strength of the welding area is too weak, which affects the reliability of the inner container after welding, due to the excessively small wall thickness of the inner container side wall.

[0013] In some embodiments, the wall thickness of the inner container bottom disc is greater than or equal to 0.25 mm and less than or equal to 0.5 mm. Within this range, on the one hand, the lightness of the inner container can be ensured, and the entire inner container will not be too heavy and inconvenient to use due to the excessive wall thickness of the inner container bottom disc. On the other hand, it can also avoid that the overlapping reinforced position is too weak, i.e., the strength of the welding area is too weak, which affects the reliability of the inner container after welding, due to the excessively small wall thickness of the rim.

[0014] In some embodiments, the length of the portion of the surrounding edge overlapping with the inner container side wall is less than or equal to 35 mm. Within this range, sufficient length of the overlapping portion is reserved for the welding between the surrounding edge and the inner container side wall, ensuring smooth welding, while avoiding excessive length of the portion of the surrounding edge overlapping with the inner container side wall, which would cause material waste and increase the weight of the inner container.

[0015] According to a second aspect of the present application, the present application provides a liquid heating container having the inner container provided in any one of the embodiments of the first aspect, and therefore the liquid heating container provided in the embodiments of the present application has all the beneficial effects of the inner container provided in any one of the embodiments of the first aspect, which are not listed here.

[0016] In some embodiments, the liquid heating container further comprises a heating tube welded to the bottom wall of the inner container. Since the bottom wall of the inner container bottom disc in the embodiments of the present application is complete without welds, welding the heating tube to the bottom wall of the inner container will not affect the welds between the inner container bottom disc and the inner container side wall, improving the reliability of the inner container.

[0017] Further aspects and / or advantages of the present application will be described in the following description, and partly will be apparent as well as other aspects will be apparent to those skilled in the art when the following description is read together with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects and features of the present application will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 Fig. 1 shows a cross-sectional structure schematic diagram of an inner container along a longitudinal direction according to a first embodiment of the present application;

[0020] Figure 2 Fig. 2 shows a structure enlarged view at I in Fig. 1; Figure 1

[0021] Figure 3 Fig. 3 shows a cross-sectional structure schematic diagram of an inner container along a longitudinal direction according to a second embodiment of the present application;

[0022] Figure 4 Fig. 4 shows a structure enlarged view at J in Fig. 3; Figure 3

[0023] Figure 5 Fig. 5 shows a cross-sectional structure schematic diagram of an inner container along a longitudinal direction according to a third embodiment of the present application;

[0024] Figure 6 Fig. 6 shows a structure enlarged view at K in Fig. 5; Figure 5

[0025] Figure 7 ​​​A cross-sectional view of the inner liner along the longitudinal direction of the fourth embodiment of this application is shown;

[0026] Figure 8 It shows Figure 7 Enlarged view of the structure at point L;

[0027] Figure 9 A cross-sectional view of the inner liner along the longitudinal direction of the fifth embodiment of this application is shown;

[0028] Figure 10 It shows Figure 9 Enlarged view of the structure at point M.

[0029] Figures 1 to 10 Explanation of icon numbers:

[0030] 10 Inner liner sidewall, 101 Second bend, 102 Second stepped wall, 103 Second extended sidewall.

[0031] 20 Inner liner chassis, 210 Bottom wall, 220 Surrounding edge, 221 First bend, 222 First stepped wall, 223 First extended side wall.

[0032] 30 welding area, 40 sealing silicone, 50 heating element. Detailed Implementation

[0033] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be changed as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0034] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein, which will become clear upon understanding the disclosure of this application.

[0035] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0036] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0037] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "bonded to" another element, the element may be directly "on" another element, directly "connected to," or "bonded to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly bonded to" another element, no other elements may be present in between.

[0038] The terminology used herein is for the purpose of describing various examples only and is not intended to limit disclosure. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0039] The directional terms such as "upper," "lower," "left," "right," "top," and "bottom" used in this application are based on the orientation shown in the accompanying drawings and are used only for the convenience of description. They are not intended to 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 the embodiments of this utility model.

[0040] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0041] The following will combine Figures 1 to 10 This invention introduces the inner liner and liquid heating container provided by embodiments of the present invention.

[0042] likeFigures 1 to 10 As shown, a first aspect of this utility model provides an inner liner, including: an inner liner sidewall 10, the bottom of which is an open structure; an inner liner base 20, the inner liner base 20 including a bottom wall 210 and a perimeter 220 extending upward from the outer peripheral edge of the bottom wall 210, the bottom wall 210 being disposed below the inner liner sidewall 10 and sealing the open structure, the perimeter 220 overlapping with a portion of the structure below the inner liner sidewall 10, and the overlapping portion being welded together; the portion where the inner liner sidewall 10 and the perimeter 220 are welded together forms a welding area 30, the distance between the lower end of the welding area 30 and the lower end of the inner liner sidewall 10 is greater than or equal to 0.5 mm, and the distance between the upper end of the welding area 30 and the upper end of the perimeter 220 is greater than or equal to 0.5 mm.

[0043] The inner liner provided in this embodiment includes an inner liner base 20 comprising a vertically extending perimeter 220. The perimeter 220 overlaps with a portion of the structure below the inner liner sidewall 10, and the overlapping portion is welded together. This arrangement ensures that, while maintaining the relatively thin wall thickness of the inner liner sidewall 10 and the inner liner base 20, the welded area 30 is protected by the combined wall thickness of the inner liner sidewall 10 and the perimeter 220, guaranteeing high strength after welding. Furthermore, since the welding position is located on the perimeter 220, the bottom wall 210 of the inner liner base 20 is unaffected by the welding, thus maintaining the integrity of the bottom wall 210 and ensuring the strength and stability of the inner liner base 20. The inner liner provided in this embodiment not only ensures the reliability of the welding but also allows for localized overlapping reinforcement at the welding position. This solves the problem in related technologies where the high temperature generated during welding poses a risk of weld burn-through at thin-walled welded areas, leading to water leakage. It also addresses the issue in related technologies where thin-walled welded areas are easily deformed by external forces during assembly and use, affecting product reliability. In addition, the entire inner liner only needs to be welded once, which greatly improves the pass rate and overall strength of the inner liner.

[0044] Furthermore, the distance between the lower end of the welding area 30 and the lower end of the inner liner sidewall 10 is greater than or equal to 0.5mm, and the distance between the upper end of the welding area 30 and the upper end of the rim 220 is greater than or equal to 0.5mm. This avoids the welding area 30 being too close to the lower end of the inner liner sidewall 10 and the upper end of the rim 220, and the welding position being too close to the edges of the overlapping positions of the lower end of the inner liner sidewall 10 and the upper end of the rim 220. This would cause the welding to exceed the overlapping area of ​​the inner liner sidewall 10 and the rim 220, thus preventing the welding area 30 from fully utilizing the overlapping reinforcement characteristics. The inner liner would be easily affected by the high temperature of welding, causing the inner liner to turn yellow or rust easily, which is not conducive to the user experience.

[0045] In the first embodiment of this application, as Figure 1 andFigure 2 As shown, the edging 220 surrounds the outer side of the inner liner sidewall 10, and the inner wall of the edging 220 is attached to the outer wall of the inner liner sidewall 10 and the two are welded together.

[0046] Alternatively, in the second embodiment of this application, such as Figure 3 and Figure 4 As shown, the inner liner sidewall 10 surrounds the outer side of the rim 220, and the inner wall of the inner liner sidewall 10 is attached to the outer wall of the rim 220 and the two are welded together.

[0047] In the third embodiment of this application, as Figure 5 and Figure 6 As shown, a portion of the structure of the edging 220 is bent to form a first bend 221. The first bend 221 includes a first stepped wall 222 extending outward in the radial direction and a first extended side wall 223 extending upward in the vertical direction. The width of the first stepped wall 222 is approximately equal to the wall thickness of the inner liner side wall 10. The lower end of the inner liner side wall 10 abuts against the first stepped wall 222. The first extended side wall 223 overlaps with a portion of the structure below the inner liner side wall 10, and the overlapping portion is welded together. This arrangement, by bending the edging 220, allows the lower end of the inner liner side wall 10 to abut against the horizontal plane of the bend, i.e., the first stepped wall 222. This limits the assembly of the inner liner side wall 10 and the edging 220, facilitating welding. It also makes the inner wall connection at the joint between the inner liner side wall 10 and the edging 220 smoother, resulting in a smoother transition inside the welded inner liner.

[0048] In the third embodiment described above, the inner liner sidewall 10 is disposed inside the perimeter 220, thus forming a first stepped wall 222 extending radially outward from the perimeter 220. However, the embodiments of this application are not limited to this; the inner liner sidewall 10 may also be disposed outside the perimeter 220, thereby forming a first stepped wall 222 extending radially inward from the perimeter 210 relative to the bottom wall 210. This can limit the assembly of the inner liner sidewall 10 and the perimeter 220, which is beneficial for welding.

[0049] In the fourth embodiment of this application, as Figure 7 and Figure 8As shown, a portion of the inner liner sidewall 10 is bent to form a second bend 101. The second bend 101 includes a second stepped wall 102 extending outward in the radial direction and a second extended sidewall 103 extending downward in the vertical direction. The width of the second stepped wall 102 is approximately equal to the wall thickness of the rim 220. The upper end of the rim 220 abuts against the second stepped wall 102. The second extended sidewall 103 overlaps with the rim 220, and the overlapping portion is welded together. This arrangement, by bending the inner liner sidewall 10, allows the upper end of the rim 220 to abut against the horizontal plane of the bend in the inner liner sidewall 10, i.e., the second stepped wall 102. This limits the assembly of the inner liner sidewall 10 and the rim 220, facilitating welding. It also makes the inner wall connection at the joint between the inner liner sidewall 10 and the rim 220 smoother, resulting in a smoother transition inside the welded inner liner.

[0050] In the fourth embodiment described above, the inner liner sidewall 10 is located on the outer side of the perimeter 220, and therefore, the inner liner sidewall 10 forms a second stepped wall 102 extending radially outward. However, the embodiments of this application are not limited to this; the inner liner sidewall 10 may also be located on the inner side of the perimeter 220, thereby forming a second stepped wall 102 extending radially inward. This can limit the assembly of the inner liner sidewall 10 and the perimeter 220, which is beneficial for welding.

[0051] In the fifth embodiment of this application, as Figure 9 and Figure 10 As shown, the portion where the inner liner sidewall 10 is welded to the surrounding edge 220 forms a welding area 30, and a sealing silicone 40 is provided in the welding area 30. This arrangement, by filling the welding area 30 with sealing silicone 40, can reduce the resonance generated between the inner liner base 20 and the inner liner sidewall 10 during heating, thereby achieving buffering resonance and improving the user experience.

[0052] Furthermore, in some embodiments, the welding area 30 is provided with multiple spaced weld points, and the sealing silicone 40 seals the gaps between the multiple weld points. With this configuration, when the welding area 30 is filled with sealing silicone 40, the welding of the welding area 30 can also be discontinuous weld points. The cooperation between the weld points and the sealing silicone 40 can reduce the resonance generated between the inner liner base 20 and the inner liner sidewall 10 during heating, achieving the functions of buffering resonance and sealing, and improving the user experience.

[0053] Furthermore, in the actual welding process, sealing silicone 40 is first applied to the overlapping surfaces of the inner liner sidewall 10 and the surrounding edge 220, and then the inner liner sidewall 10 and the surrounding edge 220 are assembled into place and welded. It can be understood that the welding can also be a continuous weld seam.

[0054] It is understandable that the sealing silicone 40 may not be filled in the welding area 30. Instead, a continuous weld seam may be welded between the inner liner side wall 10 and the surrounding edge 220, which can also achieve the function of sealing.

[0055] In some embodiments, welding can be one or more of roll welding, laser welding, and spot welding.

[0056] In some embodiments, such as Figures 1 to 10 As shown, the wall thickness of the inner liner sidewall 10 is greater than or equal to 0.25 mm and less than or equal to 0.5 mm. Within this range, on the one hand, it ensures the lightness of the inner liner, avoiding excessive weight and inconvenience due to excessive wall thickness of the inner liner sidewall 10. On the other hand, it also avoids insufficient wall thickness of the inner liner sidewall 10, which would result in weak strength at the overlapping reinforcement points, i.e., weak strength in the welded area 30, affecting the reliability of the inner liner after welding.

[0057] In some embodiments, such as Figures 1 to 10 As shown, the wall thickness of the inner liner base 20 is greater than or equal to 0.25 mm and less than or equal to 0.5 mm. Within this range, on the one hand, it ensures the lightness of the inner liner, avoiding excessive weight and inconvenience due to excessive wall thickness of the inner liner base 20. On the other hand, it also avoids insufficient wall thickness of the edging 220, which would result in weak strength at the overlapping reinforcement points, i.e., weak strength of the welded area 30, affecting the reliability of the inner liner after welding.

[0058] In some embodiments, such as Figures 1 to 10 As shown, the length A of the overlapping portion between the edging 220 and the inner liner sidewall 10 is less than or equal to 35 mm. Within this range, sufficient overlap length is reserved for welding between the edging 220 and the inner liner sidewall 10 to ensure smooth welding, while avoiding excessive overlap length that would lead to material waste and increased weight of the inner liner.

[0059] According to a second aspect of the present invention, the present invention provides a liquid heating container having an inner liner provided in any embodiment of the first aspect. Therefore, the liquid heating container provided in the embodiments of the present invention has all the beneficial effects of the inner liner provided in any embodiment of the first aspect, which will not be listed one by one here.

[0060] In some embodiments, such as Figure 1 , Figure 3 , Figure 5 , Figure 7 and Figure 9As shown, the liquid heating container also includes a heating element 50, which is welded to the bottom wall 210 of the inner liner. Since the bottom wall 210 of the inner liner chassis 20 in the embodiment of this application is complete and has no weld seam, welding the heating element 50 to the bottom wall 210 of the inner liner will not affect the weld seam between the inner liner chassis 20 and the inner liner side wall 10, thus improving the reliability of the inner liner.

[0061] In some embodiments, the liquid heating container can be an electric kettle, a health pot, etc.

[0062] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. It should be understood that, to those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A liner, characterized in that, The inner container comprises: a side wall (10) having an open bottom; a bottom disc (20) comprising a bottom wall (210) and a surrounding edge (220) extending upward from the outer peripheral edge of the bottom wall (210), the bottom wall (210) being arranged below the side wall (10) and sealing the open bottom, and the surrounding edge (220) being arranged in overlapping relation with a portion of the side wall (10) below the side wall (10) and being welded to the portion of the side wall (10) below the side wall (10); a welding area (30) formed by the portion of the side wall (10) welded to the surrounding edge (220), the distance between the lower end of the welding area (30) and the lower end of the side wall (10) being greater than or equal to 0.5 mm, and the distance between the upper end of the welding area (30) and the upper end of the surrounding edge (220) being greater than or equal to 0.5 mm.

2. The inner container according to claim 1, wherein: the surrounding edge (220) is arranged outside the side wall (10); or the side wall (10) is arranged outside the surrounding edge (220).

3. The inner container according to claim 1, wherein: a portion of the surrounding edge (220) is bent to form a first bent portion (221), the first bent portion (221) comprising a first step wall (222) extending in the radial direction and a first extension side wall (223) extending upward in the vertical direction, the width of the first step wall (222) being substantially equal to the wall thickness of the side wall (10), the lower end of the side wall (10) abutting the first step wall (222), and the first extension side wall (223) being arranged in overlapping relation with a portion of the side wall (10) below the side wall (10) and being welded to the portion of the side wall (10) below the side wall (10).

4. The inner container according to claim 1, wherein: a portion of the side wall (10) is bent to form a second bent portion (101), the second bent portion (101) comprising a second step wall (102) extending in the radial direction and a second extension side wall (103) extending downward in the vertical direction, the width of the second step wall (102) being substantially equal to the wall thickness of the surrounding edge (220), the upper end of the surrounding edge (220) abutting the second step wall (102), and the second extension side wall (103) being arranged in overlapping relation with the surrounding edge (220) and being welded to the surrounding edge (220).

5. The inner container according to claim 1, wherein: the portion of the side wall (10) welded to the surrounding edge (220) forms a welding area (30), and a sealing silica gel (40) is arranged in the welding area (30).

6. The inner container according to claim 5, wherein: a plurality of welding points are arranged in the welding area (30) at intervals, and the sealing silica gel (40) seals the gaps between the welding points.

7. The inner container according to any one of claims 1 to 6, wherein: the wall thickness of the side wall (10) is greater than or equal to 0.25 mm and less than or equal to 0.5 mm; and / or The wall thickness of the inner container bottom disc (20) is greater than or equal to 0.25 mm and less than or equal to 0.5 mm.

8. The inner container according to any one of claims 1 to 6, characterized in that, The length of the part of the surrounding edge (220) overlapping with the inner container side wall (10) is less than or equal to 35 mm.

9. A liquid heating vessel characterised in that, Comprise: The inner container according to any one of claims 1 to 8.

10. The liquid heating vessel of claim 9, wherein, The liquid heating container further comprises: A heating tube (50) welded on the bottom wall (210) of the inner container.

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