Electromagnetic heating assembly and electric cooking utensil

Abstract

The invention discloses an electromagnetic heating assembly and an electric cooking utensil, and relates to the technical field of electromagnetic heating devices, and the electromagnetic heating assembly comprises an installation support which is configured to be in an arc shape and forms a containing groove; the coil structure comprises a first coil and a second coil, the first coil is fixed in the containing groove and is coaxial with the containing groove, a plurality of second coils are arranged outside the first coil in a circumferential array mode, and every two adjacent second coils are connected in series or in parallel. The first coil is connected in series or in parallel with one of the second coils; wherein the first coil and the second coil are formed by winding aluminum-based graphene wires. According to the technical scheme provided by the invention, the heating range is expanded, the manufacturing cost is reduced, and the occupied volume is reduced.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic heating devices, and particularly to an electromagnetic heating component and an electric cooking appliance. Background Technology

[0002] Electromagnetic heating technology, with its advantages of high heating efficiency, precise temperature control, and cleanliness and environmental friendliness, is widely used in various electric cooking appliances such as electric hot pots, electric kettles, and rice cookers.

[0003] Currently, electromagnetic heating components on the market typically include a mounting bracket and a coil. The mounting bracket is mostly flat, and the coil is wound on the mounting bracket in a concentric circle manner. The coil is generally made of pure copper or pure aluminum.

[0004] This type of electromagnetic heating assembly often has the following problems:

[0005] (1) It can only heat from the bottom, and the heating area is limited; (2) The high cost of copper materials leads to a high production cost for copper coils; (3) In order to ensure sufficient conductivity, aluminum materials require a larger wire diameter, resulting in aluminum coils occupying a larger volume. Summary of the Invention

[0006] The main objective of this invention is to provide an electromagnetic heating component and an electric cooking appliance, which aims to solve at least one of the aforementioned technical problems.

[0007] To achieve the above objectives, the present invention provides an electromagnetic heating assembly comprising: The mounting bracket is configured in an arc shape and forms a receiving groove; and The coil structure includes a first coil and a second coil. The first coil is fixed inside the receiving groove and is coaxially arranged with the receiving groove. Multiple second coils are arranged in a circumferential array outside the first coil. Adjacent second coils are connected in series or in parallel. The first coil is connected in series or in parallel with one of the second coils. Both the first coil and the second coil are formed by winding aluminum-based graphene wire.

[0008] In one embodiment, the aluminum-based graphene wire includes a core, the core comprising a plurality of aluminum-based graphene conductors, the plurality of aluminum-based graphene conductors being braided into strands to form the core.

[0009] In one embodiment, the aluminum-based graphene wire comprises: Aluminum-based graphene wire, wherein the material of the aluminum-based graphene wire is an aluminum-based graphene composite material; and An insulating layer is applied to the outside of the aluminum-based graphene wire.

[0010] In one embodiment, the weight percentage of graphene in the aluminum-based graphene composite material is 5 wt% to 10 wt%.

[0011] In one embodiment, the aluminum-based graphene wire further includes a copper layer disposed between the aluminum-based graphene wire and the insulating layer, and covering the outside of the aluminum-based graphene wire.

[0012] In one embodiment, the aluminum-based graphene wire further includes a waterproof layer that covers the outside of the wire core.

[0013] In one embodiment, the winding center of the second coil is located outside the first coil, and the second coil has multiple arc-shaped segments, each of which is coaxially arranged with the first coil; and / or, The coil structure also includes two leads, one of which is connected to one of the second coils, and the other is connected to the first coil. Both leads are made of the aluminum-based graphene wire.

[0014] In one embodiment, the inner wall of the receiving groove is provided with a plurality of first mounting slots arranged in a concentric ring shape and a first notch connecting the plurality of first mounting slots. The first mounting slots are coaxially arranged with the receiving groove. The aluminum-based graphene wire is sequentially passed through the plurality of first mounting slots to wind and form the first coil; and / or, The inner wall of the receiving groove is provided with a plurality of second assembly slots arranged in a concentric ring shape and a second notch connecting the plurality of second assembly slots. The center of the second assembly slot is far away from the center of the receiving groove. The aluminum-based graphene wire is sequentially passed through the plurality of second assembly slots to wind and form the second coil.

[0015] In one embodiment, the electromagnetic heating assembly further includes magnetic strips fixed to the outer wall of the mounting bracket opposite to the receiving groove. Multiple magnetic strips are arranged at circumferential intervals along the mounting bracket, and each magnetic strip extends radially along the first coil; and / or, The mounting bracket is also provided with a heat dissipation port, which connects the inside and outside of the receiving groove.

[0016] The present invention also proposes an electric cooking appliance, including the electromagnetic heating component described above.

[0017] The electromagnetic heating component in this invention includes a mounting bracket and a coil structure. The mounting bracket is arc-shaped and forms a receiving groove, facilitating adaptation to heating scenarios such as pots and kettles. The coil structure includes a first coil and multiple second coils. The first coil is fixed at the center inside the receiving groove of the mounting bracket and is coaxially aligned with the groove, ensuring uniform magnetic field distribution and even heat distribution in the heating area. The multiple second coils are distributed in a circular array outside the first coil. This circular array allows the second coils to form a ring magnetic field around the first coil, which superimposes on the magnetic field of the first coil, expanding the overall heating range of the coil structure and reducing problems such as limited heating range and uneven heating. Adjacent second coils can be connected in series or in parallel, and the first coil can also be connected in series or in parallel with one of the second coils. The design can be flexibly adjusted according to power requirements to meet functional needs. Both the first and second coils are wound using aluminum-based graphene wire. The aluminum-based graphene wire is a wire made from aluminum-based graphene composite material as the conductive material. Aluminum-based graphene composite material refers to a composite material formed by adding graphene to aluminum as the matrix. Compared to coils made of pure copper, aluminum is cheaper, which helps reduce the overall production cost of the coil structure. Compared to coils made of pure aluminum, the graphene added to aluminum-based graphene wire has excellent conductivity, which can improve the conductivity of the wire, reduce current loss when it passes through, reduce wire heating, and extend the service life of the coil structure. Furthermore, under the same conductivity, the wire diameter of aluminum-based graphene wire can be smaller than that of pure aluminum wire. Therefore, the first and second coils formed by winding them occupy less volume, which helps to reduce the size of the entire electromagnetic heating component and make it suitable for miniaturized and compact electric cooking appliances. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of an embodiment of the electromagnetic heating component provided by the present invention. Figure 1 ; Figure 2 A schematic diagram of the structure of an embodiment of the electromagnetic heating component provided by the present invention. Figure 2 ; Figure 3 Schematic diagram of the mounting bracket for the electromagnetic heating assembly provided by the present invention Figure 1 ; Figure 4A schematic diagram of the coil structure of the electromagnetic heating assembly provided by the present invention. Figure 1 ; Figure 5 A schematic diagram of the coil structure of the electromagnetic heating assembly provided by the present invention. Figure 2 ; Figure 6 A schematic diagram of the structure of an embodiment of the electromagnetic heating component provided by the present invention. Figure 3 ; Figure 7 Schematic diagram of the mounting bracket for the electromagnetic heating assembly provided by the present invention Figure 2 ; Figure 8 A cross-sectional view of the aluminum-based graphene wire of the electromagnetic heating assembly provided by the present invention; Figure 9 A cross-sectional view of the aluminum-based graphene wire of the electromagnetic heating assembly provided by the present invention.

[0020] Explanation of icon numbers: 100. Mounting bracket; 101. First assembly slot; 102. First notch; 103. Second assembly slot; 104. Second notch; 105. Mounting slot; 106. Heat dissipation vent; 110. First fin; 120. Second fin; 200. Coil structure; 210. First coil; 220. Second coil; 221. Arc segment; 230. Lead wire; 300. Aluminum-based graphene wire; 310. Aluminum-based graphene conductor; 311. Aluminum-based graphene wire; 312. Insulation layer; 313. Copper layer; 320. Waterproof layer; 400, Magnetic strip; 401, Magnetic conductor; 410, First magnetic strip; 420, Second magnetic strip; 430, Third magnetic strip.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0024] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, or a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] This invention proposes an electromagnetic heating component.

[0027] Please see Figure 1 , Figure 2 and Figure 4 , Figure 1 A schematic diagram of the structure of an embodiment of the electromagnetic heating component provided by the present invention. Figure 1 , Figure 2 A schematic diagram of the structure of an embodiment of the electromagnetic heating component provided by the present invention. Figure 2 , Figure 4 A schematic diagram of the coil structure of the electromagnetic heating assembly provided by the present invention. Figure 1 .

[0028] In one embodiment of the present invention, the electromagnetic heating assembly includes: Mounting bracket 100 is configured in an arc shape and forms a receiving groove; and The coil structure 200 includes a first coil 210 and a second coil 220. The first coil 210 is fixed inside the receiving groove and is coaxially arranged with the receiving groove. There are multiple second coils 220, which are arranged in a circumferential array outside the first coil 210. Adjacent second coils 220 are connected in series or in parallel. The first coil 210 is connected in series or in parallel with one of the second coils 220. The first coil 210 and the second coil 220 are both formed by winding aluminum-based graphene wire 300.

[0029] The electromagnetic heating assembly in this invention includes a mounting bracket 100 and a coil structure 200. The mounting bracket 100 is arc-shaped and forms a receiving groove through its arc shape, making it suitable for heating pots, kettles, and other similar applications. The coil structure 200 includes a first coil 210 and multiple second coils 220. The first coil 210 is fixed at the center inside the receiving groove of the mounting bracket 100 and is coaxially aligned with the groove, ensuring a uniform magnetic field distribution and even heat distribution in the heating area of ​​the first coil 210. The multiple second coils 220 are arranged in a circular array outside the first coil 210. This circular array allows the second coils 220 to form a ring magnetic field around the first coil 210, which superimposes on the magnetic field of the first coil 210, expanding the overall heating range of the coil structure 200 and reducing problems such as limited heating range and uneven heating. Adjacent second coils 220 can be connected in series or in parallel, and the first coil 210 can also be connected in series or in parallel with one of the second coils 220. The design can be flexibly adapted to power requirements to meet functional needs. Both the first coil 210 and the second coil 220 are wound using aluminum-based graphene wire 300. Aluminum-based graphene wire 300 is a wire made from aluminum-based graphene composite material as the conductive material. Aluminum-based graphene composite material refers to a composite material formed by adding graphene to aluminum as the matrix. Compared to coils made of pure copper, aluminum is cheaper, which helps reduce the overall production cost of the coil structure 200. Compared to coils made of pure aluminum, the graphene added to the aluminum-based graphene wire 300 has excellent conductivity, which can improve the conductivity of the wire, reduce current loss, reduce wire heating, and extend the service life of the coil structure 200. Furthermore, under the same conductivity, the diameter of the aluminum-based graphene wire 300 can be smaller than that of pure aluminum wire. Therefore, the first coil 210 and the second coil 220 formed by winding occupy less volume, which helps to reduce the overall size of the electromagnetic heating assembly and adapt to miniaturized and compact electric cooking appliances.

[0030] In one embodiment, the aluminum-based graphene wire 300 includes a core, which includes a plurality of aluminum-based graphene conductors 310, which are braided into strands to form the core.

[0031] Reference Figure 8 In an embodiment of the present invention, the aluminum-based graphene wire 300 includes a core, which is formed by intertwining and weaving multiple aluminum-based graphene wires 310 together in a braided strand manner. The aluminum-based graphene wires 310 are made of aluminum-based graphene composite material. Braiding refers to integrating multiple individual wires together according to a certain braiding pattern (e.g., clockwise interlacing, cross-winding, etc.). The formation of the core by braiding multiple aluminum-based graphene wires 310 together improves the mechanical strength, bending resistance, and tensile strength of the core, reduces the risk of wire breakage or damage during the winding process of the first coil 210 and the second coil 220, and improves the reliability and service life of the coil structure 200. It should be noted that the core is typically formed by braiding thousands or even tens of thousands of aluminum-based graphene wires 310. Figure 8 The cross-sectional diagram is for illustrative purposes only and does not limit the number of aluminum-based graphene wires 310 in the aluminum-based graphene wire 300.

[0032] In one embodiment, the aluminum-based graphene wire 310 includes: Aluminum-based graphene wire 311 is made of aluminum-based graphene composite material; and An insulating layer 312 is wrapped around the aluminum-based graphene wire 311.

[0033] Reference Figure 9 In an embodiment of the present invention, the aluminum-based graphene wire 310 includes an aluminum-based graphene wire 311 and an insulating layer 312. The aluminum-based graphene wire 311 serves as the conductive body of the aluminum-based graphene wire 310, employing the aforementioned aluminum-based graphene composite material. The insulating layer 312 encapsulates the aluminum-based graphene wire 311, forming an insulating and protective structure to block current, prevent short circuits and leakage, ensure the aluminum-based graphene wire 310 conducts electricity independently and stably, and also provides a certain degree of physical protection for the aluminum-based graphene wire 311, reducing the risk of breakage and extending the service life of the aluminum-based graphene wire 310. Specifically, in this embodiment, the outer diameter of a single aluminum-based graphene wire 311 is 0.04 mm to 0.08 mm. Paint is applied to the outer surface of the aluminum-based graphene wire 311 to form the insulating layer 312. The molding process of the insulating layer 312 is simple, which helps to reduce costs and improve processing efficiency. The outer diameter of the aluminum-based graphene wire 311 is relatively small, and the outer diameter of the aluminum-based graphene conductor 310 formed after coating with paint is also relatively small. Therefore, the core is generally woven from thousands or even tens of thousands of aluminum-based graphene conductors 310.

[0034] In one embodiment, the weight percentage of graphene in the aluminum-based graphene composite material is 5 wt% to 10 wt%.

[0035] In embodiments of the present invention, the mass percentage of graphene in the entire aluminum-based graphene composite material is between 5 wt% and 10 wt%, for example, the mass percentage of graphene is 5 wt%, 5.5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, 9.5 wt%, 10 wt%, etc., and the remainder is mainly aluminum substrate with a small graphene content. This improves conductivity while controlling raw material costs to the maximum extent, thereby ensuring the low manufacturing cost of the coil structure 200.

[0036] In one embodiment, the aluminum-based graphene wire 310 further includes a copper layer 313, which is disposed between the aluminum-based graphene wire 311 and the insulating layer 312, and covers the outside of the aluminum-based graphene wire 311.

[0037] Reference Figure 9 In an embodiment of the present invention, the aluminum-based graphene wire 310 further includes a copper layer 313. From the inside out, the components are an aluminum-based graphene wire 311, a copper layer 313, and an insulating layer 312. The copper layer 313 covers the aluminum-based graphene wire 311, and the insulating layer 312 covers the copper layer 313. Copper itself possesses excellent conductivity and heat dissipation properties. After being coated on the outside of the aluminum-based graphene wire 311, it forms a composite conductive structure with the aluminum-based graphene wire 311, which helps to further improve conductivity while reducing heat generation in the aluminum-based graphene wire 310 and extending the service life of the coil structure 200. The copper layer 313 can be processed on the outside of the aluminum-based graphene wire 311 by electroplating, chemical plating or other methods. The copper layer 313 is only used as an intermediate cladding layer and the amount used is very small, so it has little impact on the cost of the coil structure 200. In addition, copper has good flexibility and ductility. After being clad on the outside of the aluminum-based graphene wire 311, it can further improve the flexibility of the aluminum-based graphene wire 310 and reduce the risk of breakage or damage to the aluminum-based graphene wire 310.

[0038] In one embodiment, the aluminum-based graphene wire 300 further includes a waterproof layer 320, which covers the outside of the wire core.

[0039] Reference Figure 8In embodiments of the present invention, the aluminum-based graphene wire 300 further includes a waterproof layer 320. The waterproof layer 320 completely covers the outermost layer of the entire wire core, sealing any pores that may exist when the paint is applied to form the insulating layer 312, preventing external moisture from entering the wire core, avoiding water vapor corrosion of the aluminum-based graphene wire 310, reducing problems such as short circuits or leakage, improving the reliability and safety of the electromagnetic heating component in humid environments, and extending the service life of the electric cooking appliance. In addition, the wire core is woven from multiple aluminum-based graphene wires 310, which inherently have tiny gaps. After being covered by the waterproof layer 320, the wire core and the waterproof layer 320 can form a whole, improving the stiffness and regularity of the wire, making it easier to route the wire when winding the first coil 210 and the second coil 220, and improving assembly efficiency. Furthermore, the waterproof layer 320 provides a certain degree of physical protection on the outermost layer of the wire core, reducing damage to the wire core caused by friction and scratches during coil winding, assembly, and use, further improving the strength and durability of the coil structure 200. In this specific embodiment, the waterproof layer 320 is made of polytetrafluoroethylene.

[0040] Reference Figure 2 , Figure 4 and Figure 5 In one embodiment, the inner wall of the receiving groove has a circular region and multiple fan-ring regions. The circular region is located at the center of the receiving groove, and the multiple fan-ring regions are located outside the circular region and arranged in a circumferential array outside the circular region. Each fan-ring region is correspondingly provided with a second coil 220. The first coil 210 is uniformly arranged in the circular region, and each second coil 220 is uniformly arranged in the corresponding fan-ring region, further expanding the overall heating range of the coil structure 200 and reducing problems such as limited heating range and uneven heating, thereby achieving full-range heating of the inner wall of the arc-shaped receiving groove. In the prior art, the magnetic field strength of concentric circular coils decreases as the radius increases, which easily leads to a large difference in magnetic field between the center and the edge. This solution reduces the difference in magnetic field between the center and the edge of the receiving groove by cooperating the first coil 210 in the circular region and the second coil 220 in the fan-ring region, thereby forming a more uniform magnetic field distribution over a larger area.

[0041] In one embodiment, the winding center of the second coil 220 is located outside the first coil 210, and the second coil 220 has a plurality of arc segments 221, each of which is coaxially arranged with the first coil 210.

[0042] Reference Figure 5In an embodiment of the present invention, the second coil 220 has multiple arc-shaped segments 221, each of which is coaxially arranged with the first coil 210. That is, the curvature center of all arc-shaped segments 221 is the same as the center of the first coil 210. This ensures that the magnetic fields generated by the first coil 210 and the second coil 220 are concentrically distributed and orderly superimposed, reducing magnetic field disturbances caused by non-concentricity. This results in a more uniform and continuous heating area on the arc-shaped heating surface of the electromagnetic heating assembly. On the other hand, it facilitates the second coil 220 to conform to the shape of the receiving groove of the arc-shaped mounting bracket 100, improving the convenience and regularity of winding the second coil 220. Specifically, arc-shaped segments 221 are provided on both the side of the winding center of the second coil 220 near the center of the receiving groove and the side of the winding center of the second coil 220 away from the center of the receiving groove.

[0043] The coil structure 200 also includes two leads 230, one of which is connected to one of the second coils 220, and the other is connected to the first coil 210. Both leads 230 are made of aluminum-based graphene wire 300.

[0044] Reference Figure 4 and Figure 5 In an embodiment of the present invention, the coil structure 200 further includes two leads 230. One lead 230 connects to any one of the plurality of second coils 220, and the other lead 230 connects to the first coil 210. The first coil 210 and the second coil 220 are connected to an external circuit through the two leads 230 to realize current input and output. Both leads 230 are made of aluminum-based graphene wire 300, which is the same material as the wire used to wind the first coil 210 and the second coil 220. This avoids problems such as poor contact and sudden resistance changes that may occur when connecting wires of different materials, ensuring smooth current conduction and reducing conductive losses. Specifically, in this embodiment, the first coil 210 is connected in series with one of the second coils 220, and two adjacent second coils 220 are connected in series. This allows the first coil 210, the second coil 220, and the two leads 230 to be wound together by a continuous aluminum-based graphene wire 300, reducing the processing difficulty of the coil structure 200 and ensuring the strength and conductivity of the connection.

[0045] In one embodiment, the inner wall of the receiving groove is provided with a plurality of first mounting grooves 101 arranged in a concentric ring shape and a first notch 102 connecting the plurality of first mounting grooves 101. The first mounting grooves 101 are coaxially arranged with the receiving groove. The aluminum-based graphene wire 300 is sequentially passed through the plurality of first mounting grooves 101 to wind and form a first coil 210; and / or, The inner wall of the receiving groove is provided with a plurality of second assembly grooves 103 arranged in a concentric ring shape and a second notch 104 connecting the plurality of second assembly grooves 103. The center of the second assembly groove 103 is far away from the center of the receiving groove. The aluminum-based graphene wire 300 is sequentially passed through the plurality of second assembly grooves 103 to wind and form a second coil 220.

[0046] Reference Figures 2 to 4 In an embodiment of the present invention, a plurality of first assembly slots 101 are provided on the inner wall of the receiving groove. The plurality of first assembly slots 101 are concentrically ring-shaped, and each first assembly slot 101 is coaxially arranged with the receiving groove. The inner wall of the receiving groove is also provided with a first notch 102 connecting all the first assembly slots 101 to form a continuous wiring channel. The aluminum-based graphene wire 300 is sequentially passed through the first notch 102 into the plurality of concentrically ring-shaped first assembly slots 101 and wound around the ring-shaped trajectory of each first assembly slot 101, finally forming a first coil 210 coaxially arranged with the receiving groove and the first assembly slots 101, thereby fixing the first coil 210 in the receiving groove. By restricting the winding trajectory of the first coil 210 by the first assembly groove 101, it is beneficial to reduce the winding difficulty and improve the winding accuracy, thereby improving the convenience and manufacturing efficiency of winding the first coil 210. In addition, the first assembly groove 101 can prevent the first coil 210 from shifting or loosening during use, avoid poor contact and magnetic field disorder caused by shifting, and improve the stability and reliability of the coil structure 200.

[0047] Reference Figures 2 to 4 In an embodiment of the present invention, multiple sets of second mounting slots 103 are provided on the inner wall of the receiving groove, so that each second coil 220 is adapted to be disposed in a set of second mounting slots 103. Each set of second mounting slots 103 includes multiple second mounting slots 103 arranged in a concentric ring shape. The center of each set of second mounting slots 103 is located outside the first mounting slot 101. The inner wall of the receiving groove is also provided with a second notch 104 to connect all the second mounting slots 103 in a set of second mounting slots 103, forming a continuous wiring channel. The aluminum-based graphene wire 300 passes through the second notch 104 and is sequentially inserted into the multiple concentric ring-shaped second mounting slots 103 in a set of second mounting slots 103, and is wound around the ring-shaped trajectory of each second mounting slot 103 one turn at a time, finally forming the second coil 220, thereby fixing the second coil 220 in the receiving groove. By restricting the winding trajectory of the second coil 220 through the second assembly slot 103, the winding difficulty is reduced and the winding accuracy is improved, thereby improving the convenience and manufacturing efficiency of winding the second coil 220. Furthermore, the second assembly slot 103 can prevent the second coil 220 from shifting or loosening during use, avoiding poor contact and magnetic field disturbance caused by shifting, and improving the stability and reliability of the coil structure 200.

[0048] Specifically, refer to Figure 3 The inner wall of the receiving groove is provided with multiple first fins 110. The multiple first fins 110 are arranged in a concentric open ring shape. The interval between two adjacent first fins 110 forms a first mounting groove 101. The openings of the multiple first fins 110 face the same direction, thus forming a first notch 102. The structure is simple and easy to manufacture. The inner wall of the receiving groove is provided with multiple sets of second fins 120. Each set of second fins 120 includes multiple second fins 120 arranged in a concentric open ring shape. The interval between two adjacent first fins 110 in each set of second fins 120 forms a first mounting groove 101. The openings of each set of second fins 120 face the same direction, thus forming a second notch 104. The structure is simple and easy to manufacture.

[0049] In one embodiment, the electromagnetic heating assembly further includes a magnetic strip 400, which is fixed to the outer wall of the mounting bracket 100 away from the receiving groove. The magnetic strip 400 is provided in multiples and the multiple magnetic strips 400 are arranged at intervals along the circumference of the mounting bracket 100. Each magnetic strip 400 extends radially along the first coil 210.

[0050] Reference Figure 1 and Figure 6 In an embodiment of the present invention, a plurality of magnetic strips 400 are provided on the outer wall of the mounting bracket 100 opposite to the receiving groove. These magnetic strips 400 are arranged at intervals along the circumference of the mounting bracket 100, and each magnetic strip 400 extends radially along the first coil 210, such that the extension trajectory of the magnetic strip 400 points towards the center of the first coil 210. The magnetic strips 400 have magnetic permeability. The plurality of magnetic strips 400 extending radially along the first coil 210 and arranged at intervals along the circumference converge and guide the dispersed magnetic field generated by the first coil 210 and the second coil 220, reducing the loss of magnetic field diffusion outwards, making the magnetic field more concentrated in the heating area, improving electromagnetic conversion efficiency, and thus improving the heating efficiency of the entire electromagnetic heating assembly and reducing power consumption. (Refer to...) Figure 6Each magnetic strip 400 includes at least one magnetic conductor 401. Specifically, four magnetic conductors 401 are arranged sequentially along the radial direction of the first coil 210 to form a first magnetic strip 410, three magnetic conductors 401 are arranged sequentially along the radial direction of the first coil 210 to form a second magnetic strip 420, and one magnetic conductor 401 is arranged along the radial direction of the first coil 210 to form a third magnetic strip 430. The multiple first magnetic strips 410 are arranged at equal intervals along the axial direction of the receiving groove. A second magnetic strip 420 is arranged between two adjacent first magnetic strips 410, and a third magnetic strip 430 is arranged between adjacent first magnetic strips 410 and second magnetic strips 420. The compact layout increases the coverage area of ​​the magnetic strips 400, which helps to reduce magnetic field blind spots and local magnetic field inhomogeneity, and further improves the uniformity of heating. In addition, by splicing the same magnetic conductors 401 to form magnetic strips 400 of different lengths, the manufacturing difficulty of the magnetic strips 400 is reduced, which helps to improve the processing efficiency and assembly efficiency of the magnetic strips 400.

[0051] Reference Figure 7 Specifically, in this embodiment, the outer wall of the mounting bracket 100 is provided with a mounting groove 105. The magnetic strip 400 is fixed in the mounting groove 105 by means of snap-fit ​​or adhesive, which improves the firmness of the magnetic strip 400. In addition, the mounting groove 105 provides a positioning basis for the assembly position of the magnetic strip 400, which improves the assembly efficiency of the magnetic strip 400.

[0052] The mounting bracket 100 is also provided with a heat dissipation port 106, which connects the inside and outside of the receiving groove.

[0053] Reference Figure 7 In an embodiment of the present invention, the mounting bracket 100 is provided with a heat dissipation port 106, which connects the inside and outside of the receiving groove. It can be set in the side, bottom or other areas of the receiving groove according to the heat dissipation requirements, so as to ensure that airflow or heat can pass through the heat dissipation port 106, reduce the heat accumulation in the receiving groove, reduce the risk of overheating of the coil structure 200, and extend the service life of the coil structure 200.

[0054] The present invention also proposes an electric cooking appliance, including the electromagnetic heating component described above. The specific structure of the electromagnetic heating component is as described in the above embodiments. Since this electric cooking appliance adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0055] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. An electromagnetic heating assembly, characterized in that, include: The mounting bracket is configured in an arc shape and forms a receiving groove; as well as The coil structure includes a first coil and a second coil. The first coil is fixed inside the receiving groove and is coaxially arranged with the receiving groove. Multiple second coils are arranged in a circumferential array outside the first coil. Adjacent second coils are connected in series or in parallel. The first coil is connected in series or in parallel with one of the second coils. Both the first coil and the second coil are formed by winding aluminum-based graphene wire.

2. The electromagnetic heating assembly as described in claim 1, characterized in that, The aluminum-based graphene wire includes a core, which comprises multiple aluminum-based graphene conductors, and the multiple aluminum-based graphene conductors are braided into strands to form the core.

3. The electromagnetic heating assembly as described in claim 2, characterized in that, The aluminum-based graphene wire includes: Aluminum-based graphene wire, wherein the material of the aluminum-based graphene wire is an aluminum-based graphene composite material; and An insulating layer is applied to the outside of the aluminum-based graphene wire.

4. The electromagnetic heating assembly as described in claim 3, characterized in that, The weight percentage of graphene in the aluminum-based graphene composite material is 5wt% to 10wt%.

5. The electromagnetic heating assembly as described in claim 3, characterized in that, The aluminum-based graphene wire also includes a copper layer, which is disposed between the aluminum-based graphene wire and the insulating layer, and covers the outside of the aluminum-based graphene wire.

6. The electromagnetic heating assembly as described in claim 2, characterized in that, The aluminum-based graphene wire also includes a waterproof layer, which covers the outside of the wire core.

7. The electromagnetic heating assembly as described in claim 1, characterized in that, The winding center of the second coil is located outside the first coil, and the second coil has multiple arc-shaped segments, each of which is coaxially arranged with the first coil; and / or, The coil structure also includes two leads, one of which is connected to one of the second coils, and the other is connected to the first coil. Both leads are made of the aluminum-based graphene wire.

8. The electromagnetic heating assembly as described in claim 1, characterized in that, The inner wall of the receiving groove is provided with a plurality of first mounting slots arranged in a concentric ring shape and a first notch connecting the plurality of first mounting slots. The first mounting slots are coaxially arranged with the receiving groove. The aluminum-based graphene wire is sequentially passed through the plurality of first mounting slots to wind and form the first coil; and / or, The inner wall of the receiving groove is provided with a plurality of second assembly slots arranged in a concentric ring shape and a second notch connecting the plurality of second assembly slots. The center of the second assembly slot is far away from the center of the receiving groove. The aluminum-based graphene wire is sequentially passed through the plurality of second assembly slots to wind and form the second coil.

9. The electromagnetic heating assembly as described in claim 1, characterized in that, The electromagnetic heating assembly further includes magnetic strips fixed to the outer wall of the mounting bracket away from the receiving groove. Multiple magnetic strips are arranged at circumferential intervals along the mounting bracket, and each magnetic strip extends radially along the first coil; and / or, The mounting bracket is also provided with a heat dissipation port, which connects the inside and outside of the receiving groove.

10. An electric cooking appliance, characterized in that, Includes the electromagnetic heating assembly as described in any one of claims 1 to 9.

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