Portable electric heating cup

Abstract

The utility model relates to the field of small household appliance vacuum cups, in particular to a portable electric heating cup which comprises a cup shell, a cup container and an electric control heating assembly. Wherein the electric control heating assembly comprises a thick film heating circuit arranged at the bottom of the cup liner; the problems that an existing electric heating cup is uneven in heating, the appearance of the cup bottom is affected, and a heating pipe at the bottom of a cup body is large in occupied size and not beneficial to miniaturization and portability are solved. In the prior art, a thick film heating circuit is adopted, so that an actual gap exists between the inner cup wall of a cup body and a thick film heating body, dirt is hidden, and the grade of a product is influenced; by adopting the special design of the thick film heating circuit assembly and the design that the cup body inner container is welded into a whole in advance, heating of the electric heating cup is more uniform, the interior of the cup body is integrated and seamless, and the electric heating cup is miniaturized and light in weight; through the design of a fixing structure, reasonable connection and control of a cup bottom temperature control assembly and an electric control assembly are kept, and the thick film heating circuit assembly has wide popularization value in the electric heating cup industry.

Description

Technical Field

[0001] This utility model relates to the field of small household appliance thermos cups, and more specifically, to a portable electric thermos cup. Background Technology

[0002] Electric thermos cups are among the most commonly used small household appliances in daily life, leading to fierce technological development and competition. Among similar electric thermos cups, those that are lighter, smaller, offer more stable heating, are more aesthetically pleasing, and are cheaper are the most popular choices for consumers.

[0003] The electric kettle industry, especially the vacuum electric kettle industry, generally uses heating elements. Compared to using thick-film heating elements, heating elements have three disadvantages: 1) Heating elements are large and heavy, which is not conducive to the design of portable and miniaturized products. 2) The bottom of the electric kettle is small, and the heating element can only be designed to heat very briefly, resulting in concentrated heat. After boiling water repeatedly, the bottom of the kettle will turn noticeably yellow, affecting the user experience. If the water quality is poor, scale can easily form in the corresponding area where the heat is concentrated, affecting the product's usability. 3) Electric kettles using heating elements have adverse effects on many production processes, such as vacuuming, making the product prone to problems such as poor vacuuming.

[0004] To overcome the shortcomings of heating elements, thick-film heating circuits have been adopted in the electric water cup industry. Currently, thick-film heating circuits are printed on a flat steel plate, and then the steel plate is assembled with the vacuum cup body (e.g., by welding or bonding with silicone). This design structure creates a "gap" between the flat steel plate and the vacuum cup wall, which can trap dirt and grime, affecting the user experience. Utility Model Content

[0005] This utility model aims to overcome at least one of the defects (deficiencies) of the prior art and provide a portable electric heating cup to solve the problems of uneven heating and affecting the appearance of the bottom of the cup in existing heating tube electric heating cups; and the problems of "gaps" in the use of thick film heating circuit as heating element, which are not conducive to the widespread application of the technology.

[0006] The technical solution adopted by this utility model is to provide a portable electric heating cup, including: a hollow cup shell, a cup liner disposed within the cup shell with an internal cavity and an opening at the top, and an electrically controlled heating assembly connected to the cup liner; the cup liner is disposed on the upper part of the cup shell and forms a vacuum layer at least on its side with the cup shell; the lower part of the cup shell has a mounting cavity, and the electrically controlled heating assembly is disposed in the mounting cavity; wherein, the electrically controlled heating assembly includes: a thick film heating circuit disposed at the bottom of the cup liner.

[0007] It is advantageous to provide heat to the inner cup through the electronically controlled heating component, keep the inner cup warm through the vacuum layer, place the electronically controlled heating component through the mounting cavity, and replace the traditional heating tube with a thick film heating circuit, so that the heating effect is more uniform and avoids the formation of yellow heating marks on the bottom of the inner cup after long-term use of traditional heating tubes. The thick film heating circuit is also lighter, making the electric cup easier to carry.

[0008] Furthermore, the electrically controlled heating assembly also includes: a fixed structure, a protective component and a fixed bracket connected to the fixed structure, and a control circuit board disposed on the fixed bracket; the control circuit board is electrically connected to the protective component and the thick film heating circuit, and the protective component is connected to the inner cup through the fixed structure.

[0009] It is beneficial to install the protection components and control circuit boards in the electric heating assembly in an orderly manner through a fixed structure, so as to reduce the volume of the electric heating assembly after assembly; to make the protection components in direct contact with the cup liner, thereby improving the response speed of the protection components; and to install the protection components and the fixed brackets on the edge of the fixed structure, so as to avoid deformation of the bottom of the cup liner during installation, which would affect the flatness of the cup liner.

[0010] Preferably, the fixing structure includes: a plurality of connection positions provided at the bottom of the cup liner, and a connector that mates with the connection positions, wherein the protective component is connected to the connection positions through the connector, so that the protective component and the cup liner are in contact.

[0011] It is beneficial to provide support for the connection between the protective component and the cup liner through the connection position, reduce the contact area between the fixed structure and the cup liner, thereby reducing the overall weight of the electric heating component; the installation of connectors and connecting columns reduces the connection complexity of the fixed structure and reduces manufacturing costs.

[0012] Furthermore, the connection point is a connecting post welded to the bottom of the cup liner, the thick film heating circuit avoids the connecting post, the connecting post has a downward-opening connecting cavity, and the connecting cavity matches the connector.

[0013] In another preferred embodiment, the fixing structure includes: an annular support and a connector, the annular support being connected to the cup shell and having a plurality of connection positions, the protective component being connected to the connection positions through the connector, so that the protective component and the cup liner are in contact.

[0014] The ring-shaped support completely avoids welding marks at the bottom of the cup liner, maintaining its flatness and aesthetics, and also prevents the weld seams from yellowing and rusting after prolonged use. The connection between the ring-shaped support and the cup shell enhances the structural strength of the fixed structure and improves the yield rate.

[0015] Furthermore, the annular support includes: a mounting top plate and a lower extension edge extending downward from the edge of the mounting top plate; the lower extension edge is connected to the cup shell; the connecting position is provided on the mounting top plate, and the connecting member cooperates with the connecting position; the mounting top plate is also provided with an avoidance opening, and the avoidance opening avoids the protective component.

[0016] It is advantageous to use the top plate as a horizontal support surface and the lower edge as a vertical support surface, so that the support provided by the ring support is sufficiently stable; by avoiding the installation of protective components through the opening, the weight of the top plate is further reduced.

[0017] In another preferred embodiment, the fixing structure includes at least two support plates and a connector. The support plates are provided with connection positions and are respectively connected to the cup shell. The protective component is connected to the connection positions through the connector, so that the protective component and the cup liner are in contact.

[0018] The support plates help to completely avoid welding marks, keeping the bottom of the cup liner flat and aesthetically pleasing, and preventing the cup liner welds from yellowing and rusting after long-term use. The connection between the two support plates and the cup shell not only distributes the support force but also reduces the weight of the support plates and shrinks the welding area, thus reducing welding costs. At the same time, the support plates are easy to manufacture, resulting in a higher rate of flawless finished products and lower production costs. Moreover, the support plates are more flexible and compact in terms of space occupation compared to ring supports, further achieving the weight reduction effect.

[0019] Furthermore, the support piece includes: a mounting plate and a lower extension edge connected to the mounting plate; the lower extension edge is connected to the cup shell; there is a gap between two adjacent support pieces; the support piece avoids the protective component.

[0020] It is advantageous to use the horizontal plate as a horizontal support surface and the lower extension edge as a vertical support surface, so that the support provided by the support plate is sufficiently stable and the weight of the support plate is reduced; the weight of the support plate is further reduced by installing the connection position avoidance protection component.

[0021] Furthermore, the cup liner includes: an annular sidewall and a bottom structure; the bottom structure includes: a base plate, and an annular rim formed by extending upward from the edge of the base plate; the lower edge of the annular sidewall is connected to the upper edge of the annular rim; the thick film heating circuit is disposed on the lower bottom surface of the base plate.

[0022] It is advantageous to form a cavity through the annular sidewall, and transfer the heat generated by the electronically controlled heating component to the cavity through the bottom plate in the bottom structure. The annular rim connects to the annular sidewall, and the weld is moved upward. This not only avoids the problem of yellowing and rusting of the weld after long-term use on the bottom plate, but also reduces the welding difficulty. Uneven weld joints can be directly flattened with rollers, further reducing welding costs. The thick-film heating circuit is set on the bottom surface of the bottom plate, which improves the heat transfer speed and efficiency of the bottom plate.

[0023] Furthermore, the thickness of the base plate is greater than that of the annular sidewall; the annular sidewall and the bottom structure are welded together and are both made of stainless steel, and the thick film heating circuit is printed on the bottom surface of the base plate.

[0024] The stainless steel ring-shaped sidewalls and bottom structure make the thermos cup smooth and easy to clean, with strong sealing and leak-proof performance, lightweight and sturdy structure; by printing the thick film heating circuit directly on the bottom surface of the base plate, the connection between the two is more convenient and cost-effective.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: by using a thick-film heating circuit as the heating element, the heating of the electric cup is more uniform, and the bottom of the cup is kept beautiful; by using a special design of the thick-film heating circuit assembly and pre-welding the inner liner of the cup into an integrated design, the internal structure of the electric cup is seamless, and the product is miniaturized and lightweight; by using a fixed structure design to maintain the reasonable connection and control of the bottom temperature control and electrical control components, the thick-film heating circuit assembly has widespread application value in the electric hot water cup industry. Attached Figure Description

[0026] Figure 1 This is an exploded view of the present invention.

[0027] Figure 2 This is a schematic diagram of a preferred fixed structure connection of the present invention.

[0028] Figure 3 This is an exploded view of a preferred fixed structure connection of this utility model.

[0029] Figure 4 This is a schematic diagram of another preferred fixed structure connection of the present invention.

[0030] Figure 5 This is an exploded view of another preferred fixed structure connection of this utility model.

[0031] Figure 6 This is a schematic diagram of another preferred fixed structure connection of the present invention.

[0032] Figure 7 This is an exploded view of another preferred fixed structure connection of this utility model.

[0033] Figure 8 This is a cross-sectional view of a preferred installation position of the thick-film heating circuit of this utility model.

[0034] Figure 9 This is a cross-sectional view of another preferred installation position of the thick film heating circuit of this utility model.

[0035] Figure 10 This is a schematic diagram of the bottom structure of this utility model.

[0036] Figure 11 This is a cross-sectional schematic diagram of the connection between the bottom structure and the thick film heating circuit of this utility model.

[0037] Figure 12 This is an enlarged schematic diagram of the connection between the annular rim and the inner cup of this utility model.

[0038] Explanation of reference numerals in the attached drawings: cup shell 10, cup liner 100, annular sidewall 110, bottom structure 120, base plate 121, annular rim 122, electrically controlled heating component 200, thick film heating circuit 210, fixing structure 220, protection component 230, control circuit board 240, fixing bracket 221, connection position 222, annular support 223, support piece 224. Detailed Implementation

[0039] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0040] Example

[0041] like Figure 1-12 As shown, this embodiment provides a portable electric heating cup, including: a hollow cup shell 10, a cup liner 100 disposed within the cup shell 10 with an internal cavity and an opening at the top, and an electrically controlled heating assembly 200 connected to the cup liner 100; the cup liner 100 is disposed on the upper part of the cup shell 10 and forms a vacuum layer at least on its side with the cup shell 10; the lower part of the cup shell 10 has an installation cavity, and the electrically controlled heating assembly 200 is disposed in the installation cavity; wherein, the electrically controlled heating assembly 200 includes: a thick film heating circuit 210 disposed at the bottom of the cup liner 100.

[0042] In this embodiment, the outermost shell 10 of the electric heating cup is made of a lightweight and easy-to-clean material. It contains a vacuum layer and an installation cavity. The vacuum layer is formed by the interlayer between the inner cup 100 and the outer shell 10. The inner cup 100 and the outer shell 10 are two concentrically arranged cylindrical surfaces. The inner cup 100 serves as a container for holding liquids or food. The installation cavity is located at the bottom of the outer shell 10 and is used to install the electrically controlled heating component 200 that provides heat to the inner cup 100. The electrically controlled heating component 200 is a thick-film heating circuit 210. The heating layer in the thick-film heating circuit 210, formed by printing metal alloy or metal oxide paste, serves as an electrode. It is then connected to an external power source to form a closed loop. When current flows through the heating layer, the resistive material converts electrical energy into heat energy and rapidly transfers the heat to the inner cup 100, achieving uniform heating of the bottom of the inner cup 100. Since the heating layer of the thick film heating circuit 210 can be evenly covered on the surface through the printing process, it avoids local overheating when it transfers heat to the cup 100, making it suitable for keeping the liquid in the cup 100 continuously boiling. At the same time, its design shape is flexible and varied, and the material is thin and light, making it suitable for miniaturized assembly in the inner cavity of the cup shell 10.

[0043] The electrically controlled heating assembly 200 further includes: a fixing structure 220, a protective assembly 230 and a fixing bracket connected to the fixing structure 220, and a control circuit board 240 disposed on the fixing bracket; the control circuit board 240 is electrically connected to the protective assembly 230 and the thick film heating circuit 210, and the protective assembly 230 is abutted and connected to the cup liner 100 through the fixing structure 220.

[0044] In this embodiment, the fixing structure 220 serves as an independent auxiliary component, enabling the orderly connection of the electrically controlled heating assembly 200 within the mounting cavity. The protection component 230 is an anti-skid thermostat, used to prevent interference during signal reception in the thick-film heating circuit 210, which could lead to abnormal start-stop. The control circuit board 240 handles signal transmission and reception with the thick-film heating circuit 210. The contact contact shortens the heat transfer time, improving thermal conductivity and reducing the response time of the protection component 230. The fixing structure 220 provides a stable support for the protection component 230, distributing the contact force between the protection component 230 and the cup liner 100 evenly across the same auxiliary component, thus enhancing the connection stability of the protection component 230. Furthermore, the fixing structure 220 reduces the overall weight of the electrically controlled heating assembly 200, eliminating the need for separate welding, screw, or adhesive connections for the protection component 230, control circuit board 240, and thick-film heating circuit 210; a single auxiliary component achieves the fixed connection of these components.

[0045] The fixing structure 220 includes: a plurality of connection positions provided at the bottom of the cup liner 100, and a connector that cooperates with the connection positions. The protective component 230 is connected to the connection positions through the connector, so that the protective component 230 and the cup liner 100 are in contact.

[0046] The connection point is a connecting post welded to the bottom of the cup liner 100. The thick film heating circuit 210 avoids the connecting post. The connecting post has a downward-opening connecting cavity, which matches the connecting piece.

[0047] In this embodiment, when the fixing structure 220 is the first option, the fixing structure 220 includes a connecting position and a connecting member. The fixing bracket 221 has four symmetrical through holes on each side, with two through holes on each side close to the edge of the fixing bracket 221. These two through holes are used for welding and fixing to the bottom of the cup liner 100. The through holes are located at the edge, so the welding and stamping will not cause deformation to the bottom of the cup liner 100. The protective component 230 is abutted and connected to the cup liner 100 through the fixing structure 220. The control circuit board 240 is abutted and connected to the cup liner 100 through the fixing bracket 221. The thick-film heating circuit 210 is sandwiched between the fixing structure 220 and the bottom of the cup liner 100, making the heat conduction of the cup liner 100 uniform and improving the heat conduction efficiency.

[0048] In this embodiment, the connector is a bolt, which connects the connecting post to the bottom of the cup liner 100 by welding. During the welding process, because the screw is positioned close to the edge of the cup liner 100, it will not directly cause a weld protrusion on the center plane of the bottom of the cup liner 100, thus protecting the aesthetics of the cup liner 100. The printed heating layer of the thick-film heating circuit 210 avoids the welding position of the connecting post, preventing the welding process from affecting the normal use of the thick-film heating circuit 210. The connecting cavity of the connecting post is a threaded cavity, providing a mounting and fixing position for components installed below the fixing bracket 221.

[0049] The fixing structure 220 includes an annular support 223 and a connector. The annular support 223 is connected to the cup shell 10 and has a plurality of connection positions 222. The protective component 230 is connected to the connection positions 222 through the connector, so that the protective component 230 and the cup liner 100 are in contact.

[0050] The annular support 223 includes: an assembly top plate and a lower extension edge extending downward from the edge of the assembly top plate; the lower extension edge is connected to the cup shell 10; the connection position 222 is provided on the assembly top plate, and the connector cooperates with the connection position 222; the assembly top plate is also provided with an avoidance opening, which avoids the protective component 230.

[0051] In this embodiment, when the fixing structure 220 is the second type, the fixing structure 220 includes an annular support 223 and a connector. The annular support 223 is hollow, which further reduces the weight of the fixing structure 220, thereby reducing the weight of the electrically controlled heating assembly 200 and also reducing the welding area between the fixing structure 220 and the cup shell 10, further reducing welding costs. The control circuit board 240 and the protection assembly 230 are sequentially installed on the lower surface of the hollow position of the annular support 223 and connected to the fixing bracket 221. The thick film heating circuit 210 is directly printed on the bottom surface of the cup liner 100 facing the mounting cavity, forming a contact connection between the control circuit board 240, the protection assembly 230, the thick film heating circuit 210 and the cup liner 100.

[0052] In this embodiment, four through holes are symmetrically provided on both sides of the assembly top plate. Two through holes on one side are close to the edge of the assembly top plate and are used to fix two connection positions 222. The connector is a bolt. The connection position 222 is welded to the bottom of the cup liner 100 so that the welding of the connection position 222 will not cause deformation to the bottom of the cup liner 100 and maintain the aesthetics of the cup liner 100.

[0053] The fixing structure 220 includes at least two support plates 224 and a connector. The support plates 224 are provided with connection positions 222 and are respectively connected to the cup shell 10. The protective component 230 is connected to the connection positions 222 through the connector, so that the protective component 230 and the cup liner 100 are in contact.

[0054] The support piece 224 includes: a mounting plate and a lower extension edge connected to the mounting plate; the lower extension edge is connected to the cup shell 10; there is a gap between two adjacent support pieces 224; the support piece 224 avoids the protective component 230.

[0055] In this embodiment, when the fixing structure 220 is the third option, the fixing structure 220 includes two support plates 223 and a connector. The two support plates 224 are L-shaped and symmetrically arranged on both sides of the mounting cavity. The protection component 230 and the control circuit board 240 are located at the center of the mounting cavity through the fixing bracket 221. Each support plate 223 has a connection position 222. The fixing bracket 221 and the support plate 224 are fixed together through the connection position 222. The support plate 224 is welded to the cup shell 10. The thick film heating circuit 210 is directly printed on the bottom surface of the cup liner 100 facing the mounting cavity, forming a contact connection between the control circuit board 240, the protection component 230, the thick film heating circuit 210 and the cup liner 100.

[0056] In this embodiment, the mounting plate is a horizontal plane, and the lower extension edge is a vertical plane. The lower extension edge is fixedly connected to the cup shell 10 by welding or adhesive. Each mounting plate has a connection position 222. The connection position is close to the edge of the mounting plate and is used to insert and fix the connection position 222. The connection position 222 is a screw. The connection position 222 is welded and fixed to the bottom of the cup liner 100, so that the welding of the connection position 222 will not cause deformation to the bottom of the cup liner 100, thus maintaining the aesthetics of the cup liner 100.

[0057] The cup liner 100 includes an annular sidewall 110 and a bottom structure 120; the bottom structure 120 includes a base plate 121 and an annular rim 122 extending upward from the edge of the base plate 121; the lower edge of the annular sidewall 110 is connected to the upper edge of the annular rim 122; the thick film heating circuit 210 is disposed on the lower bottom surface of the base plate 121.

[0058] In this embodiment, the annular sidewall 110 is cylindrical, the bottom structure 120 is concave, the bottom plate 121 is circular, the annular rim 122 is seamlessly connected to the bottom plate 121, and the annular sidewall 110 and the annular rim 122 are fixedly connected by welding. After welding, a roller is used to flatten the weld surface so that the inner and outer surfaces of the weld surfaces of the annular sidewall 110 and the annular rim 122 are aesthetically pleasing.

[0059] The thickness of the base plate 121 is greater than that of the annular sidewall 110; the annular sidewall 110 and the bottom structure 120 are welded together and are both made of stainless steel; the thick film heating circuit 210 is printed on the bottom surface of the base plate 121.

[0060] In this embodiment, the annular rim 122 includes a first annular segment and a second annular segment. The thickness of the first annular segment matches the thickness of the cup liner 100. The thickness of the second annular segment is greater than that of the first annular segment. The thickness of the base plate 121 is greater than that of the first annular segment and matches that of the second annular segment. The cross-section of the annular sidewall is stepped, including an upper part connected to the cup liner 100 and a lower part connected to the base plate 121. The cross-sectional thickness of the upper part is W1, and the cross-sectional thickness of the lower part is W2. The value of W1 ranges from 0.3mm to 0.6mm, the value of W2 ranges from 0.8mm to 1.5mm, and the ratio of W1 to W2 ranges from 0.2 to 0.75.

[0061] In this embodiment, both the annular sidewall 110 and the bottom structure 120 are made of materials with low thermal conductivity, which easily block heat conduction, are impact-resistant and wear-resistant, corrosion-resistant and rust-proof, high-temperature resistant, non-toxic and harmless, easy to clean and antibacterial, and recyclable. In this embodiment, they are both made of 304 stainless steel or 316 stainless steel. Furthermore, the inner liner is seamless, and the surface is treated with electrolytic polishing and sandblasting. The thick-film heating circuit 210 directly forms a metal alloy or metal oxide paste on the bottom surface of the base plate 121 using screen printing technology, allowing the electrode heating layer formed by the paste to directly transfer heat to the bottom of the inner liner through the base plate 121.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A portable electrically heated cup comprising: Hollow cup shell, and cup liner with containing cavity and opening at top and electric control heating assembly connected with cup liner are arranged in cup shell; cup liner is arranged in upper part of cup shell and vacuum layer is formed between cup liner and cup shell at least on side; installation cavity is left in lower part of cup shell, and electric control heating assembly is arranged in installation cavity; characterized in that, electric control heating assembly comprises thick film heating circuit arranged at bottom of cup liner.

2. A portable electrically heated cup as claimed in claim 1 wherein, Electric control heating assembly further comprises fixing structure, protection assembly and fixed support connected with fixing structure, and control circuit board arranged on fixed support; control circuit board is electrically connected with protection assembly and thick film heating circuit, and protection assembly is connected with cup liner in abutment through fixing structure.

3. A portable electrically heated cup as claimed in claim 2, wherein Fixing structure comprises a plurality of connecting positions arranged at bottom of cup liner, and connecting piece matched with connecting position, and protection assembly is connected with connecting position through connecting piece, so that protection assembly and cup liner are connected in abutment.

4. A portable electrically heated cup as claimed in claim 3, wherein Connecting position is connecting column connected with bottom of cup liner in welding, thick film heating circuit avoids connecting column, connecting column is provided with connecting cavity with opening downward, and connecting cavity is matched with connecting piece.

5. The portable electrically heated cup of claim 2, wherein, Fixing structure comprises annular support and connecting piece, annular support is connected with cup shell and is provided with a plurality of connecting positions, protection assembly is connected with connecting position through connecting piece, so that protection assembly and cup liner are connected in abutment.

6. A portable electrically heated cup as claimed in claim 5 wherein, Annular support comprises assembly top plate and downward extending edge formed by edge of assembly top plate; downward extending edge is connected with cup shell; connecting position is arranged on assembly top plate, connecting piece is matched with connecting position; assembly top plate is further provided with avoiding opening, and avoiding opening avoids protection assembly.

7. The portable electrically heated cup of claim 2, wherein, Fixing structure comprises at least two support sheets and connecting piece, support sheet is provided with connecting position and is connected with cup shell respectively, protection assembly is connected with connecting position through connecting piece, so that protection assembly and cup liner are connected in abutment.

8. A portable electrically heated cup according to claim 7, wherein Support sheet comprises installation horizontal plate and downward extending edge connected with installation horizontal plate; downward extending edge is connected with cup shell; interval is left between adjacent two support sheets; Support sheet avoids protection assembly.

9. A portable electrically heated cup according to any one of claims 1 to 8, wherein, Cup liner comprises annular side wall and bottom structure; bottom structure comprises bottom plate and annular surrounding edge formed by upward extending of edge of bottom plate; lower edge of annular side wall is connected with upper edge of annular surrounding edge; thick film heating circuit is arranged on lower bottom surface of bottom plate.

10. A portable electrically heated cup according to claim 9, wherein Thickness of bottom plate is greater than annular side wall; annular side wall and bottom structure are connected in welding and are all stainless steel material, and thick film heating circuit is printed on lower bottom surface of bottom plate.

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