Inner container and liquid heating container
Through seamless welding technology, the thick film heating plate is flush with the bottom of the kettle liner, which solves the problem of poor welding and improves the aesthetics and cleaning convenience of the product.
Patent Information
- Application Number
- CN202420810985.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-18
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-04-18
AI Technical Summary
The different thicknesses of the thick film heating plate and the inner liner of the kettle result in poor welding, resulting in steps, unsightly and difficult to clean.
Seamless welding technology is used to keep the thick film heating plate flush with the bottom of the tank, and the welds are easy to polish to form an integrated liner.
It improves the appearance of the product, reduces the space for dirt and evil, and facilitates cleaning.
Smart Images
Figure CN222367547U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of household appliances, in particular to an inner pot and a liquid heating container. Background Art
[0002] The heating component of the thick film heating electric kettle is the thick film heating plate. The thickness of the thick film heating plate is generally about 1.2 mm, while the thickness of the kettle liner is about 0.4 mm. The stainless steel substrate of the thick film heating plate is thicker, while the wall thickness of the liner is thinner. It is difficult to weld stainless steel of different thicknesses into one beautiful whole. According to industry experience, the defect rate of welding substrates of different thicknesses into one is high, and defects such as pores, slag inclusions, incomplete penetration, incomplete fusion, cracks, pits, etc. will appear at the welding point.
[0003] In order to address the technical problem that the stainless steel base of the thick film heating plate is thicker, while the wall thickness of the inner liner is thinner, and stainless steels of different thicknesses are difficult to be welded together in an attractive manner, the prior art mostly adopts a stack welding method, that is, the thick film heating plate is stacked on the bottom surface of the bottom of the kettle inner liner, and the diameter of the thick film heating plate is larger than the diameter of the hole circle at the bottom of the kettle inner liner. In this way, the heat transfer surface (the surface in contact with the liquid) of the thick film heating plate cannot be kept flush with the upper surface of the bottom of the kettle inner liner, and a step will be generated. The weld is located at the step, and the weld at the step cannot be polished off, because polishing has high requirements on the flatness of the bottom surface of the inner liner. Therefore, the weld will remain at the step, which is not aesthetically pleasing. In addition, there is a step at the bottom of the kettle, which will hide dirt and is not easy to clean. Utility Model Content
[0004] Based on the technical problems that in the prior art, the thick film heating plate and the bottom of the inner pot are overlapped and welded, the welds at the steps cannot be polished off, and the welds are easy to hide dirt and are difficult to clean, the utility model provides an inner pot, wherein the thick film heating plate and the bottom of the pot body are seamlessly welded, the upper surface of the thick film heating plate and the upper surface of the bottom of the pot body can be kept flush, the welds are easy to polish, and an integrated inner pot can be formed, which improves the aesthetics of the product and facilitates the cleaning of the inside of the inner pot.
[0005] The utility model provides an inner container for a liquid heating container, comprising:
[0006] The bladder body extends up and down and is open at both ends. The lower end of the bladder body is provided with an inwardly extending mounting flange, and the inner edge of the mounting flange forms the lower opening of the bladder body;
[0007] A thick film heating plate is arranged in the lower opening, and its upper surface is flush with the upper surface of the mounting flange. The peripheral edge of the thick film heating plate is seamlessly welded to the inner edge of the mounting flange.
[0008] In some embodiments, the body comprises:
[0009] The upper gallbladder body has openings at both ends;
[0010] The bottom bracket has an opening at the upper end and an inwardly extending lower end to form the installation flange; the upper opening of the bottom bracket is sealed and welded to the lower opening of the upper gallbladder body.
[0011] In some embodiments, the inner diameter of the upper opening of the base is equal to the inner diameter of the lower opening of the upper bladder body, and the base and the upper bladder body are seamlessly welded; or the side wall of the upper opening of the base and the side wall of the lower opening of the upper bladder body are closely attached to each other and tightly welded.
[0012] In some embodiments, the wall thickness of the base is greater than or equal to the wall thickness of the upper body.
[0013] In some embodiments, the base has a thickness ranging from 0.24 mm to 0.6 mm.
[0014] In some embodiments, the height of the base is in the range of 1.5-200 mm.
[0015] In some embodiments, the thickness of the thick film heating plate is greater than or equal to the thickness of the mounting flange.
[0016] In some embodiments, the thick film heating plate has a thickness in the range of 1.2-2 mm.
[0017] In some embodiments, the thick film heating plate includes a substrate, an insulating dielectric layer and a thick film resistor layer printed on the bottom surface of the substrate, and the top surface of the substrate is flush with the upper surface of the mounting flange.
[0018] The utility model also comprises a liquid heating container, which comprises the above-mentioned inner container.
[0019] Compared with the prior art, the advantages and positive effects of the utility model are:
[0020] The above-mentioned inner pot adopts seamless welding technology between the thick film heating plate and the bottom of the pot body. After welding is completed, the upper surface of the thick film heating plate and the upper surface of the bottom of the pot body can be kept flush, and the weld is easy to polish to form an integrated inner pot, thereby improving the appearance of the product. At the same time, the flat bottom of the integrated inner pot reduces the space for dirt and grime to hide, making it more convenient for users to clean the stains accumulated on the bottom of the inner pot. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0022] Figure 1 This is a schematic diagram of the structure of the inner container in the first embodiment of the utility model;
[0023] Figure 2 This is a schematic diagram of the structure of the inner container in the second embodiment of the utility model;
[0024] Figure 3 This is a schematic diagram of the structure of the inner container in the third embodiment of the present utility model;
[0025] Description of reference numerals:
[0026] Inner liner 100; liner body 110; mounting flange 111; thick film heating plate 120;
[0027] Inner liner 200; liner body 210; upper liner body 211; bottom bracket 212; mounting flange 2121; thick film heating plate 220;
[0028] Inner liner 300; liner body 310; upper liner body 311; bottom bracket 312; mounting flange 3121; thick film heating plate 320. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0032] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more. Embodiment 1
[0033] Reference Figure 1 , is an embodiment of the inner liner 100 of the utility model, and the inner liner 100 is used in a liquid heating container, such as an electric kettle.
[0034] The inner pot 100 includes a pot body 110 and a thick film heating plate 120 .
[0035] The body 110 of the bladder extends up and down and is open at both ends. The lower end of the body 110 is provided with an inwardly extending mounting flange 111 , and the inner edge of the mounting flange 111 forms the lower opening of the body 110 .
[0036] The thick film heating plate 120 is disposed in the lower opening of the body 110 , the upper surface of the thick film heating plate 120 is flush with the upper surface of the mounting flange 111 , and the periphery of the thick film heating plate 120 is seamlessly welded to the inner edge of the mounting flange 111 .
[0037] In this embodiment, the lower opening formed by the installation flange 111 is a circular hole, and the thick film heating plate 120 is disc-shaped. The diameter of the lower opening of the body 110 is slightly larger than the diameter of the thick film heating plate 120.
[0038] The manufacturing process of the inner liner 100 is as follows: first, the thick film heating plate 120 and the liner body 110 are clamped by a fixture so that the upper surface of the thick film heating plate 120 and the upper surface of the mounting flange 111 are kept flush. Then, a laser welding machine is used to weld along the seam between the upper surface of the thick film heating plate 120 and the upper surface of the mounting flange 111 to form a weld a. Finally, after welding is completed, the weld a is polished with a polishing machine to eliminate the weld.
[0039] The above-mentioned inner liner 100, the thick film heating plate 120 and the bottom of the liner body 110 are seamlessly welded. After welding, the upper surface of the thick film heating plate 120 and the upper surface of the bottom of the liner body 110 can be kept flush, and the weld is easy to polish to form an integrated inner liner 100, which not only solves the problem that stainless steel of different thicknesses is difficult to weld into one in an aesthetically pleasing manner, but also improves the appearance of the product. At the same time, the flat bottom of the integrated inner liner 100 reduces the space for hiding dirt and grime, making it more convenient for users to clean the stains accumulated at the bottom of the inner liner 100.
[0040] In this embodiment, the material of the liner body 110 is metal, preferably stainless steel. The stainless steel liner 100 has excellent corrosion resistance, wear resistance, non-deformation, and good durability. At the same time, the inner wall is smooth and not easy to adhere to stains, so it is convenient and quick to clean.
[0041] The thickness of the body 110 is in the range of 0.2-1.5 mm. Usually, the thickness of the stainless steel body is between 0.4-1.2 mm. In order to save material costs, the wall thickness of the body 110 can be appropriately reduced, such as the thickness of the body 110 can be 0.2 mm, 0.24 mm, 0.3 mm, etc. In some high-end or large-capacity products, a thicker body 110 can be used to increase strength and durability, such as the thickness of the body 110 can be 1.3 mm, 1.4 mm, 1.5 mm, etc.
[0042] The diameter of the upper opening of the inner pot 110 is in the range of 80-130 mm. It is understandable that if the upper opening is too large, heat is easily lost; if the upper opening is too small, it is not conducive to the placement of the ingredients to be cooked and the cleaning of the inner cavity of the inner pot 100.
[0043] The shape of the side wall section of the body 110 is not specifically limited, and may be a straight cylinder with equal diameters at the top and bottom, or a truncated cone-shaped cylinder with a smaller top and a larger bottom, or an irregular cylinder structure with a bulging portion in the middle.
[0044] In this embodiment, the thick film heating plate 120 includes a substrate, an insulating dielectric layer printed on the substrate, and a thick film resistor layer.
[0045] The substrate is made of materials with excellent thermal conductivity and mechanical stability, which can be metal materials such as stainless steel, aluminum, etc., or non-metallic materials such as alumina ceramics, aluminum nitride ceramics, zirconium oxide, etc. A layer of insulating material is first printed on the substrate to form an insulating dielectric layer to play the role of electrical insulation and prevent short circuits. The slurry containing metal or metal alloy powder and a special organic carrier is printed on the insulating dielectric layer through a screen printing process. After high-temperature sintering, a heating resistor with a certain resistance is formed to form a thick film resistor layer. In addition, a protective coating can be covered on the outer layer of the thick film resistor layer to enhance its corrosion resistance and wear resistance, and at the same time, it can prevent moisture and other pollutants from damaging the thick film resistor layer.
[0046] In this embodiment, in order to achieve that the thick film heating plate 120 can be welded and fixed to the body 110, the substrate is made of metal, preferably stainless steel.
[0047] The insulating medium layer and the thick film resistor layer are arranged on the bottom surface of the substrate, that is, the bottom surface of the thick film heating plate 120 is the heating surface, and the top surface is the heat transfer surface (the surface in contact with the liquid). The heat transfer surface is flush with the upper surface of the mounting flange 111 for seamless welding. The heating surface is on the bottom surface of the thick film heating plate 120, so that the thick film resistor layer does not contact the liquid in the liner 100, so as to ensure that the thick film heating plate 120 can perform heating work normally.
[0048] In this embodiment, the thickness of the thick film heating plate 120 is greater than or equal to the thickness of the mounting flange 111 of the liner body 110. The thickness of the thick film heating plate 120 ranges from 1.2 to 2 mm. It is understood that the thickness of the thick film heating plate 120 should not be too small to avoid deformation of the substrate during the manufacturing and use of the thick film heating plate 120; the thickness of the thick film heating plate 120 should not be too large to avoid increased costs and increased weight of the liner 100. Embodiment 2
[0049] See also Figure 2 The difference between this embodiment and the first embodiment is that the structure of the liner body is different. In the first embodiment, the liner body 210 is an integrated structure, while in the present embodiment, the liner body 210 includes an upper and a lower part, which is a split structure. The structure of the liner in the second embodiment is described in detail below in conjunction with the accompanying drawings.
[0050] In this embodiment, the inner pot 200 includes a pot body 210 and a thick film heating plate 220 .
[0051] The gallbladder body 210 includes an upper gallbladder body 211 and a bottom support 212 .
[0052] The upper bile body 211 extends up and down and is opened at both ends. The upper opening of the upper bile body 211 forms the upper opening of the bile body 210 .
[0053] The upper end of the bottom bracket 212 is open, and the lower end of the bottom bracket 212 is provided with an inwardly extending mounting flange 2121; the inner edge of the mounting flange 2121 forms the lower opening of the bladder body 210. The upper opening of the bottom bracket 212 and the lower opening of the upper bladder body 211 are sealed and welded.
[0054] The thick film heating plate 220 is arranged in the lower opening of the body 210. The upper surface of the thick film heating plate 220 is flush with the upper surface of the mounting flange 2121, and the peripheral edge of the thick film heating plate 220 is seamlessly welded to the inner edge of the mounting flange 2121.
[0055] In this embodiment, the lower opening formed by the installation flange 2121 is a circular hole, and the thick film heating plate 220 is a disc-shaped. The diameter of the lower opening of the body 210 is slightly larger than the diameter of the thick film heating plate 220.
[0056] The manufacturing process of the liner 200 in this embodiment is specifically as follows:
[0057] (1) First, the thick film heating plate 220 and the base 212 are clamped by a fixture so that the upper surface of the thick film heating plate 220 and the upper surface of the mounting flange 2121 remain flush. Then, a laser welding machine is used to weld along the seam between the upper surface of the thick film heating plate 220 and the upper surface of the mounting flange 2121 (forming weld a), thereby welding the thick film heating plate 220 and the base 212 together.
[0058] (2) After the thick film heating plate 220 and the base 212 are welded, the weld a is polished with a polishing machine to eliminate the weld.
[0059] (3) Then, the bottom bracket 212 and the upper bladder body 211 are clamped by a fixture, and the bottom bracket 212 and the upper bladder body 211 are welded together (forming a weld b).
[0060] (4) Finally, the weld b between the bottom bracket 212 and the upper gallbladder body 211 is polished to make the bottom bracket 212 and the upper gallbladder body 211 become one piece.
[0061] The height of the bottom bracket 212 in this embodiment is lower than the overall height of the body 210, that is, the depth of the bottom bracket 212 is relatively small. The bottom bracket 212 is set and its height is lowered, which improves the convenience of the fixture to clamp the bottom bracket 212 and the thick film heating plate 220 assembly, so as to ensure the flushness between the upper surface of the thick film heating plate 220 and the bottom surface of the body 210, and facilitates the operator to accurately control the laser welding equipment to align the welding position; in addition, the shallow bottom bracket 212 also helps to simplify the subsequent weld processing process, making it easier for the operator to operate the polishing machine, accurately and quickly polish the weld, significantly improving the aesthetic appearance of the weld, and greatly reducing the difficulty and complexity of the operation of the related process.
[0062] In the inner liner 200 of the present embodiment, seamless welding technology is adopted between the thick film heating plate 220 and the bottom of the liner body 210. After welding, the upper surface of the thick film heating plate 220 and the upper surface of the bottom of the liner body 210 can be kept flush, and the weld is easy to polish to form an integrated inner liner 200, which not only solves the problem that stainless steels of different thicknesses are difficult to be welded into one in an aesthetically pleasing manner, thereby improving the appearance of the product, but also the flat bottom of the integrated inner liner 200 reduces the space for hiding dirt and grime, making it more convenient for users to clean the stains accumulated at the bottom of the inner liner 200; in addition, the thick film heating plate 220 is welded to the base 212, which is easy for the operator to accurately control the laser welding equipment to align with the welding position, and is also convenient for the operator to operate the polishing machine for polishing operations, which significantly improves the aesthetic appearance of the weld and greatly reduces the difficulty and complexity of the operation of related processes.
[0063] In this embodiment, the wall thickness of the bottom bracket 212 is equal to the wall thickness of the upper gallbladder body 211, the inner diameter of the upper opening of the bottom bracket 212 is equal to the inner diameter of the lower opening of the upper gallbladder body 211, and the bottom bracket 212 and the upper gallbladder body 211 are connected and tightly welded. The bottom bracket 212 and the upper gallbladder body 211 can be welded by a seamless welding process, so that the gallbladder body 210 forms an integrated structure.
[0064] In this embodiment, the thickness of the base 212 is in the range of 0.2-1.5 mm. Preferably, the thickness of the base 212 is in the range of 0.24-0.6 mm, and most preferably 0.4 mm.
[0065] The height of the bottom bracket 212 ranges from 1.5 to 200 mm. It is understood that if the height of the bottom bracket 212 is too small, it is not conducive to the welding between the bottom bracket 212 and the upper body 211 and the polishing of the weld between the two; if the height of the bottom bracket 212 is too large, it is not conducive to the operator to accurately perform welding and polishing operations.
[0066] In other embodiments, the wall thickness of the upper liner body 211 may be smaller than the thickness of the bottom support 212 to save materials and reduce manufacturing costs. Embodiment 3
[0067] like Figure 3 As shown, the difference between this embodiment and the second embodiment is that the inner diameter of the upper opening of the bottom support 312 in the inner liner 300 in this embodiment is not equal to the inner diameter of the lower opening of the upper liner body 311.
[0068] In this embodiment, the inner pot 300 includes a pot body 310 and a thick film heating plate 320 .
[0069] The gallbladder body 310 includes an upper gallbladder body 311 and a bottom bracket 312. The upper gallbladder body 311 extends up and down and is open at both ends. The upper end of the bottom bracket 312 is open, and the lower end of the bottom bracket 312 is provided with an inwardly extending mounting flange 3121; the inner edge of the mounting flange 3121 forms the lower opening of the gallbladder body 310.
[0070] The thick film heating plate 320 is arranged in the lower opening of the body 210 , the upper surface of the thick film heating plate 320 is flush with the upper surface of the mounting flange 3121 , and the peripheral edge of the thick film heating plate 320 is seamlessly welded to the inner edge of the mounting flange 3121 .
[0071] In this embodiment, the inner diameter of the upper opening of the bottom support 312 is equal to or slightly larger than the outer diameter of the lower opening of the upper bladder body 311, so that the inner wall surface of the bottom support 312 and the outer wall surface of the upper bladder body 311 partially overlap and fit closely to each other, and the two can be tightly welded by penetration welding or the like.
[0072] In this embodiment, the thickness of the base 312 is in the range of 0.2-1.5 mm. Preferably, the thickness of the base 312 is in the range of 0.24-0.6 mm, and most preferably 0.4 mm.
[0073] The wall thickness of the upper liner 311 may be less than or equal to the wall thickness of the bottom bracket 312. The thickness of the upper liner 311 is preferably 0.24 mm. The wall thickness of the upper liner 311 is less than the wall thickness of the bottom bracket, which can not only save materials and reduce manufacturing costs, but also make the step height formed by the inner wall of the inner liner and the overlapping part of the two smaller, so as to improve the appearance and reduce the space for dirt and grime.
[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.
Claims
1. An inner container for a liquid heating container, characterized in that: include: The bladder body extends up and down and is open at both ends. The lower end of the bladder body is provided with an inwardly extending mounting flange, and the inner edge of the mounting flange forms the lower opening of the bladder body; A thick film heating plate is arranged in the lower opening, and its upper surface is flush with the upper surface of the mounting flange. The peripheral edge of the thick film heating plate is seamlessly welded to the inner edge of the mounting flange.
2. The liner according to claim 1, characterized in that: The body of the invention comprises: The upper gallbladder body has openings at both ends; The bottom bracket has an opening at the upper end and an inwardly extending lower end to form the installation flange; the upper opening of the bottom bracket is sealed and welded to the lower opening of the upper gallbladder body.
3. The inner container according to claim 2, characterized in that: The inner diameter of the upper opening of the base is equal to the inner diameter of the lower opening of the upper bladder body, and the base and the upper bladder body are seamlessly welded; or the side wall of the upper opening of the base and the side wall of the lower opening of the upper bladder body are closely attached to each other and tightly welded.
4. The inner container according to claim 2, characterized in that: The wall thickness of the bottom support is greater than or equal to the wall thickness of the upper gallbladder body.
5. The inner container according to claim 3, characterized in that: The thickness of the base is in the range of 0.24-0.6 mm.
6. The liner according to claim 2, characterized in that: The height of the base is in the range of 1.5-200 mm.
7. The liner according to claim 1, characterized in that: The thickness of the thick film heating plate is greater than or equal to the thickness of the mounting flange.
8. The inner container according to claim 7, characterized in that: The thickness of the thick film heating plate is in the range of 1.2-2 mm.
9. The inner container according to claim 1, characterized in that: The thick film heating plate comprises a substrate, an insulating medium layer and a thick film resistor layer printed on the bottom surface of the substrate, and the top surface of the substrate is flush with the upper surface of the mounting flange.
10. A liquid heating container, characterized in that: Comprising the inner container as described in any one of claims 1-9.