Electric heating vacuum container

Abstract

The utility model discloses an electric heating vacuum container which comprises a first welding area which is formed by welding an inner container side wall below an inner container and an upper wall part at the top of a connecting ring in an overlapping edge mode. In the second welding area, a bent edge is arranged below the side wall of the inner container, a turned-over edge is arranged at the top of the heating disc, and the second welding area is formed by welding the bent edge and the turned-over edge after the bent edge and the turned-over edge are in butt joint. The utility model has the beneficial effects that the automatic alignment of the heating disc and the inner container is realized through the butt joint positioning of the flanging and the bent edge, the integrated welding of the inner container, the heating disc, the connecting ring and the shell is realized through the combination of the flanging positioning and the composite welding structure, and the technical process is simplified while the sealing performance is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of electric heating container manufacturing, and in particular to an electric heating vacuum container. Background Technology

[0002] Traditional electrothermal vacuum containers typically employ a split-type, multi-stage welding process, such as welding the inner liner and heating plate separately. This method requires multiple positioning steps, which can easily lead to weld misalignment, resulting in defects such as incomplete welds and missed welds. Furthermore, the vacuum layer sealing is complex; for example, if the outer shell and inner liner components are connected by multiple welds, the defect rate is high, the risk of vacuum failure is significant, and the process of connecting multiple welds requires complex tooling and fixtures, increasing complexity and cost. Therefore, there is an urgent need for an integrated welding solution with a simple structure and precise positioning to reduce the risk of vacuum failure and the complexity of the manufacturing process. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an electric heating vacuum container that achieves integrated welding of the inner liner, heating plate, connecting ring and outer shell through flange positioning and composite welding structure, thereby improving sealing performance and simplifying the production process.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an electric heating vacuum container, including a first welding area, which is formed by overlapping welding of the inner liner sidewall below the inner liner and the upper wall portion of the connecting ring at the top; a second welding area, wherein a bent edge is provided below the inner liner sidewall and a flange is provided at the top of the heating plate, which is formed by welding the bent edge and the flange together.

[0005] Preferably, the assembly includes a third welding area, wherein the bottom of the connecting ring is provided with a lower wall, and the bottom of the outer shell is provided with a lower shell wall, which are formed by welding the lower wall and the lower shell wall together.

[0006] Preferably, a fourth welding area is included, which is formed by bonding and welding between the top of the inner liner and the top of the outer shell.

[0007] Preferably, the flange is the edge portion of the heating plate other than the heating part, and the flange bends upward to form a positioning rounded corner.

[0008] Preferably, the connecting ring has a vacuum cavity at the point where it contacts the heating plate.

[0009] Preferably, the vacuum cavity is provided with a vacuum extraction hole.

[0010] Preferably, the vacuum cavity is sealed with brazing filler metal.

[0011] Preferably, the outer shell is located outside the inner liner and the connecting ring to form a vacuum layer.

[0012] Preferably, the connecting ring includes a middle wall, and the flanged portion is attached to the middle wall.

[0013] Preferably, the bent edge extends downward from the inner liner sidewall and bends inward.

[0014] The beneficial effects of this utility model are as follows: by positioning the flange and the bent edge together, the heating plate and the inner liner are automatically aligned. By combining the flange positioning with the composite welding structure, the inner liner, heating plate, connecting ring and outer shell are integrated and welded, which improves the sealing performance and simplifies the process. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the bottom of the electrothermal vacuum container described in this utility model;

[0016] Figure 2 This is a schematic diagram showing the positions of welding areas a, b, and c in the electrothermal vacuum container of this utility model;

[0017] Figure 3 This is a schematic diagram showing the position of the welding area d in the electrothermal vacuum container of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall exploded structure of the electrothermal vacuum container described in this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0020] Example 1

[0021] Reference Figure 1-4 As illustrated, this embodiment provides an electric heating vacuum container, relating to a vacuum heating cup or kettle welding technology, including four welding position areas, namely a first welding area a, a second welding area b, a third welding area c, and a fourth welding area d, wherein: the first welding area a is the top welding position of the inner liner 100 and the connecting ring 200, the second welding area b is the welding position between the inner liner 100 and the heating plate 300, the third welding area c is the welding position of the connecting ring 200 and the outer shell 400 at the bottom, and the fourth welding area d is the welding position of the connecting ring 200 and the outer shell 400 at the top.

[0022] More specifically, the first welding area a is formed by overlapping welding of the inner liner sidewall 101 below the inner liner 100 and the upper wall 201 at the top of the connecting ring 200.

[0023] The second welding area b has a bent edge 102 at the bottom of the inner liner sidewall 101 and a flange 301 at the top of the heating plate 300. The bent edge 102 and the flange 301 are welded together. The bent edge 102 extends downward from the inner liner sidewall 101 and bends inward, while the flange 301 is located at the top of the heating plate 300 and extends outward.

[0024] The third welding area c has a lower wall 202 at the bottom of the connecting ring 200 and a lower shell wall 401 at the bottom of the outer shell 400. The lower wall 202 and the lower shell wall 401 are welded together to form the third welding area.

[0025] The fourth welding area d is formed by bonding and welding the top of the inner liner 100 and the top of the outer shell 400.

[0026] As a preferred embodiment, to achieve installation and positioning between the heating plate 300 and the connecting ring 200, the flange 301 is the edge portion of the heating plate 300 other than the heating part. The flange 301 bends upward to form a positioning rounded corner, which is used for initial positioning between the heating plate 300 and the connecting ring 200. The connecting ring 200 includes a middle wall 206, and the flange 301 is partially attached to the middle wall 206. After the heating plate 300 is embedded and attached to the connecting ring 200, the flange 301 is partially attached to the middle wall 206, which has the functions of positioning and support. The heating plate 300 first contacts the connecting ring 200 and is limited downward. After the flange 301 is partially attached to the middle wall 206, the welding area between the upper end of the connecting ring 200 and the inner liner side wall 101 can also be directly determined, that is, the first welding area a.

[0027] As a preferred embodiment, in order to achieve multi-stage sealing of the electric heating vacuum container, a vacuum cavity 204 is provided on the connecting ring 200 at the contact point with the heating plate 300, and a vacuum hole 205 is provided in the vacuum cavity 204, and the vacuum cavity 204 is sealed by brazing material 500. At the same time, the outer shell 400 is located outside the inner liner 100 and the connecting ring 200 to form a vacuum layer 600.

[0028] This embodiment provides an electrothermal vacuum container that, through the combination of flanged positioning and composite welding structure, enables the integrated welding of the inner liner 100, heating plate 300, connecting ring 200 and outer shell 400, thereby improving sealing performance and simplifying the production process.

[0029] This embodiment differs from the traditional split-stage welding process. It employs an upward-flanged structure for the heating plate 300 to be butt-welded to the inner liner 100. The flanging positioning achieves precise alignment of the connecting ring 200, the heating plate 300, and the inner liner 100, forming an integrated composite welded body. This structure fundamentally reduces the risk of vacuum failures such as incomplete welds and weak welds caused by multiple weld seams.

[0030] The welding principle includes: butt welding the inner liner 100 to the heating plate 300; initial positioning of the connecting ring 200 with the heating plate 300 via locating rounded corners; then, overlapping welding of the top of the connecting ring 200 to the side wall of the inner liner 100; at this point, the inner liner 100, connecting ring 200, and heating plate 300 are welded together as one unit; the outer shell 400 is welded end-to-end with the inner liner 100 to form a single unit, followed by vacuuming. This welding method solves the problem of high welding defect rate between the inner liner 100 and the outer shell 400. The proposed electric heating container has a simple structure, is easy to process, and its production process is relatively simpler than traditional methods.

[0031] The basic structure of this embodiment is implemented as follows:

[0032] Step 1: Welding the inner liner 100 to the heating plate 300.

[0033] An inwardly bent edge 102 is machined below the inner wall 101 of the inner liner 100; an annular flange 301 is formed by stamping on the top of the heating plate 300; the bent edge 102 is joined with the flange 301 and welded to form a second welding area b.

[0034] Step 2: Welding the connecting ring 200 to the inner liner 100.

[0035] The upper wall 201 of the connecting ring 200 is overlapped with the inner liner side wall 101 and welded to form the first welding area a; the lower wall 202 of the connecting ring 200 is attached to the lower shell wall 401 of the outer shell 400 and welded to form the third welding area c.

[0036] Step 3: Vacuuming and sealing.

[0037] Air is extracted from the vacuum layer 600 through the vacuum hole 205 on the connecting ring 200; in this embodiment, brazing filler 500 can be injected into the vacuum cavity 204, and the vacuum hole 205 can be sealed after melting at high temperature.

[0038] The fully welded structure has been optimized. This includes top sealing welding, whereby the top of the inner liner 100 and the top of the outer shell 400 are welded together to form a fourth welding area d, achieving a fully enclosed vacuum layer.

[0039] Positioning optimization: In this embodiment, the positioning rounded corner includes two parts, upper and lower. The upper part is connected to the bent edge 102, and the lower part is attached to the middle wall 206 of the connecting ring 200, which can limit horizontal and vertical downward displacement. The flange 301 is attached to the middle wall 206 of the connecting ring 200, simultaneously ensuring vertical positioning and determining the welding area between the upper end of the connecting ring 200 and the inner liner side wall 101, which is the first welding area a.

[0040] It should be noted that this embodiment aims at the flange positioning and multi-stage composite welding structure of an electrothermal vacuum container, which can be a vacuum heating cup or an electric kettle. For the vacuum heating cup, the welding technology itself can adopt existing mature welding technologies in the field of cup manufacturing, such as argon arc welding, high-frequency induction welding, electron beam welding, etc. The vacuuming inside the cup is also a mature existing technology. The implementation principles of the various electronic components inside the cup, such as how the heating plate 300 achieves electric heating, the implementation of heating control, the installation of heating elements, the layout of circuits, etc., are all mature existing technologies. Those skilled in the art can refer to the existing technology to implement it. Moreover, the core essence of this application, namely the flange positioning and multi-stage composite welding structure, is not a necessary technical feature of this application in terms of structure, including but not limited to the examples above, and therefore will not be described in detail.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the scope of protection of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description and ideas. It is neither necessary nor possible to exhaustively describe all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the technical solution of this utility model should be covered within the scope of protection of the claims of this utility model.

Claims

1. An electrothermal vacuum container, characterized in that: include, The first welding area (a) is formed by overlapping welding of the inner liner sidewall (101) below the inner liner (100) and the upper wall (201) at the top of the connecting ring (200); The second welding area (b) is provided with a bent edge (102) below the inner liner sidewall (101) and a flange (301) on the top of the heating plate (300). The two areas are formed by welding the bent edge (102) and the flange (301) together.

2. The electrothermal vacuum container according to claim 1, characterized in that: include, The third welding area (c) is formed by welding the bottom of the connecting ring (200) with a lower wall (202) and the bottom of the outer shell (400) with a lower shell wall (401).

3. The electrothermal vacuum container according to claim 2, characterized in that: include, The fourth welding area (d) is formed by bonding and welding the top of the inner liner (100) and the top of the outer shell (400).

4. The electrothermal vacuum container according to claim 1, characterized in that: The flange (301) is the edge portion of the heating plate (300) other than the heating part, and the flange (301) bends upward to form a positioning rounded corner.

5. The electrothermal vacuum container according to claim 1, characterized in that: The connecting ring (200) has a vacuum cavity (204) at the point where it fits with the heating plate (300).

6. The electrothermal vacuum container according to claim 5, characterized in that: The vacuum cavity (204) is provided with a vacuum hole (205).

7. The electrothermal vacuum container according to claim 5, characterized in that: The vacuum cavity (204) is sealed with brazing filler (500).

8. The electrothermal vacuum container according to claim 2, characterized in that: The outer shell (400) is located outside the inner liner (100) and the connecting ring (200), forming a vacuum layer (600).

9. The electrothermal vacuum container according to claim 1, characterized in that: The connecting ring (200) includes a middle wall (206), and the flange (301) is partially attached to the middle wall (206).

10. The electrothermal vacuum container according to claim 1, characterized in that: The bent edge (102) extends below the inner liner sidewall (101) and bends inward.

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