Electromagnetic heating cooking utensil

Abstract

The utility model discloses an electromagnetic heating cooking utensil. The electromagnetic heating cooking utensil comprises a coil panel assembly and a cooking container. The coil disc assembly includes a central axis, a viewing surface, and at least two coils. The coils are used for generating an alternating magnetic field when powered on, all the coils are distributed in the circumferential direction of the coil disc assembly, and all the coils can rotate around the central axis as a whole. A dominant structure is arranged on the visual surface, and the arrangement position and / or area of the dominant structure corresponds to the position and / or area of the coil. The cooking container is used for being separably placed in a magnetic induction area of the coil panel assembly from the coil panel assembly. Wherein the dominant structure is exposed when the cooking container is moved out of the magnetically inductive region. According to the electromagnetic heating cooking utensil, the electromagnetic heating device for multi-point heat source heating is provided, a dominant structure can enable a user to visually feel the positions of the multi-point heat sources, and the user can know the difference between the product and the prior art.

Description

Technical Field

[0001] This application relates generally to the field of cooking appliance technology, and more specifically to an electromagnetic heating cooking appliance. Background Technology

[0002] Induction heating (IH) appliances are household appliances that directly heat cookware using the principle of electromagnetic induction. Common examples include induction cookers and rice cookers. Current IH appliances employ multiple independently controlled coils in the heating element to achieve a three-dimensional heating effect and a complex, intense convection heating effect during cooking. By independently controlling the heating of different coils, the positions of the hot and cold zones within the pot can be varied. This means that different convection directions can be formed in different hot and cold zones at different cooking times, creating multiple states of thermal convection and resulting in a complex, intense convection heating effect inside the inner pot. However, the use of multiple independently heating coils makes coil arrangement difficult, requires complex winding techniques, and leads to complex magnetic strip and magnetic strip holder structures, resulting in high assembly difficulty and overall high cost. Furthermore, the fixed heating position of the coils limits the heating area, leading to less than ideal cooking results.

[0003] Therefore, there is a need to provide an electromagnetic heating cooking appliance to at least partially solve the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, this application provides an electromagnetic heating cooking appliance, comprising:

[0006] A coil assembly having a central axis and a visible surface.

[0007] The coil assembly includes at least two coils that generate an alternating magnetic field when energized. The winding center of the coils is offset from the central axis of the coil assembly, such that all the coils are circumferentially distributed along the central axis of the coil assembly, and all the coils as a whole are rotatable about the central axis of the coil assembly.

[0008] A visible structure is provided on the visible surface, and the location and / or area of ​​the visible structure corresponds to the location and / or area of ​​the coil; and

[0009] A cooking container, detachably placed from the coil assembly in the magnetically inductive region of the coil assembly.

[0010] When the cooking container is placed in the magnetically inductive region, the cooking container is substantially coaxial with the coil assembly; when the cooking container is removed from the magnetically inductive region, the explicit structure is exposed.

[0011] According to this application, an electromagnetic heating cooking appliance provides a multi-point heat source rotation heating technology solution, which changes the convection direction of the food and ensures even heating, thereby improving cooking quality. Through a visible structure, technical information can be identified by consumers via a visible structure set on the visible surface of the coil assembly. Users can intuitively see the positions of multiple heat sources, thus perceiving the difference between their multi-point heat source rotation heating product and other similar traditional products on the market.

[0012] Optionally, the visible structure is a structure that protrudes 1mm to 5mm from the visible surface.

[0013] According to this application, the explicit structure makes the technical setting information visible, and also allows the sensing distance between the heated pot wall of the cooking container and the coil to be flexibly set within an optimal range.

[0014] Optionally, the coil assembly further includes a coil disk, the coil being disposed on the bottom surface of the coil disk, the central axis of the coil disk being the central axis of the coil disk assembly, and the coil disk being rotatable about the central axis of the coil disk assembly.

[0015] When the cooking container is placed in the magnetically inductive area, the coil is located substantially coaxially with and below the cooking container.

[0016] When the cooking container is removed from the magnetically inductive area, the coil disk, which has the visible structure, is exposed.

[0017] According to this application, the coil is arranged on the coil disk and rotated by the coil disk. The coil disk is easily visible to the user, and the visible structure is arranged on the coil disk, thus making it easily visible to the user.

[0018] Optionally, the dominant structure includes:

[0019] At least the portion of the coil disk corresponding to the coil is transparent so that the coil can be observed from the top of the coil disk.

[0020] According to this application, the coil disk is transparent, so that the user can directly see the heat source coil.

[0021] Optionally, the dominant structure includes:

[0022] The visual effect of the portion of the coil disk corresponding to the coil is different from that of other portions.

[0023] According to this application, the location of the heat source can be easily perceived by users through the design of obvious visual effects.

[0024] Optionally, the portion of the coil disk corresponding to the coil is removable to expose the coil, wherein the structure for removal has a different visual effect from the surrounding area.

[0025] According to this application, the visible structure includes a detachable structure, so that users can not only perceive the location of the heat source, but also see the structure of the heat source, which is conducive to users' in-depth understanding of the technical solution of multi-point heat source.

[0026] Optionally, the explicit structure is configured as a simulated coil pattern provided on the upper surface of the portion of the coil disk corresponding to the coil.

[0027] According to this application, the explicit structure has a specific and vivid shape.

[0028] Optionally, the coil is provided with a positioning groove for protruding toward the cooking container, and the coil is disposed on the bottom surface of the coil and located in the positioning groove.

[0029] According to this application, by providing positioning grooves on the coil disk, it is convenient to install and position the coil, and it can also prevent the coil from moving on the bottom surface of the coil disk, thereby improving the stability of the coil. At the same time, the positioning grooves have a certain degree of visual recognition and can serve as a visible structure.

[0030] Optionally, the visible structure includes: the coil disk being entirely transparent or at least a portion of the positioning groove being transparent.

[0031] According to this application, the positioning groove is made transparent, allowing users to directly see the coil, which helps to enhance the user's intuitive understanding.

[0032] Optionally, the explicit structure includes: the surface of the bottom of the positioning groove facing the cooking container is provided with simulated coil patterns.

[0033] Furthermore, the spiral winding pattern of the simulated coil corresponds to the coil winding structure.

[0034] According to this application, the explicit structure is concrete and vivid.

[0035] Optionally, the dominant structure includes:

[0036] The coil disk is made of transparent glass or transparent plastic; or

[0037] The positioning groove is made of transparent glass or transparent plastic.

[0038] According to this application, the positioning groove is made transparent, allowing users to directly see the coil, which helps to enhance the user's intuitive understanding.

[0039] Optionally, the electromagnetic heating cooking appliance further includes:

[0040] At least one first indicator light is provided to indicate information about the rotation of the coil around the central axis of the coil assembly.

[0041] According to this application, cooking appliances can also indicate information about the rotation of a heat source.

[0042] Optionally, the coil assembly includes N coils, and the electromagnetic heating cooking appliance includes N first indicator lights, all of which are arranged at intervals on the same circle, where N is a natural number greater than or equal to 2.

[0043] According to this application, the number of first indicator lights corresponds to the number of heat sources. All the first indicator lights are arranged at intervals on the same circle, so that all the first indicator lights can be lit in sequence to achieve the effect of light spots moving along the circumference, simulating the rotation of the heat source.

[0044] Optionally, the electromagnetic heating cooking appliance further includes:

[0045] The pot body includes the cooking container and the coil assembly; and

[0046] The lid is used to cover the pot body.

[0047] The first indicator light is disposed on the cover, and the light signal of the first indicator light is emitted from the upper surface of the cover.

[0048] According to this application, the light signal of the first indicator light is easily observable.

[0049] Optionally, the electromagnetic heating cooking appliance further includes at least one second indicator light, which indicates at least some information about whether the coil is energized.

[0050] According to this application, the cooking appliance also uses indicator lights to show whether the heat source is outputting power, resulting in a good human-computer interaction effect.

[0051] Optionally, the second indicator light is disposed on the cover, and the light signal of the second indicator light is emitted from the upper surface of the cover.

[0052] According to this application, the light signal of the second indicator light is easily observable.

[0053] Optionally, the coil assembly includes N coils, and the electromagnetic heating cooking appliance includes N first indicator lights and N second indicator lights, with all the first indicator lights and second indicator lights arranged alternately on the same circle, where N is a natural number greater than or equal to 2.

[0054] According to this application, the number of second indicator lights corresponds to the number of heat sources, thus providing a more visual representation of the heat source's operating status. The first and second indicator lights are arranged alternately on the same circle, resulting in an aesthetically pleasing design and saving space.

[0055] Optionally, the light signal of the first indicator light presents an arrow display effect; and / or

[0056] The light signal of the second indicator light presents the display effect of a coil.

[0057] According to this application, the light symbols of the first indicator light and the second indicator light are graphic and easy to understand.

[0058] Optionally, the color of the first indicator light is different from the color of the second indicator light; and / or

[0059] The shape of the light signal of the first indicator light is different from the shape of the light signal of the second indicator light.

[0060] According to this application, the lights of the first indicator light and the second indicator light are clearly distinguishable, making it convenient for users to use. Attached Figure Description

[0061] The following drawings, illustrating embodiments of this application, are incorporated herein by reference and are used to understand this application. The drawings illustrate embodiments of this application and their descriptions, serving to explain the principles of this application. In the drawings,

[0062] Figure 1 This is a side cross-sectional schematic diagram of an electromagnetic heating cooking appliance according to a preferred embodiment of this application;

[0063] Figure 2 for Figure 1 An enlarged schematic diagram of part A;

[0064] Figure 3 for Figure 1 An exploded three-dimensional diagram of the electromagnetic heating cooking appliance shown.

[0065] Figure 4 for Figure 1 The diagram shows an exploded three-dimensional view of the IH heating module of an electromagnetic heating cooking appliance, where the coil assembly is not disassembled.

[0066] Figure 5 for Figure 4Another exploded perspective view of the IH heating module shown, in which the coil assembly is disassembled;

[0067] Figure 6 for Figure 4 A top view of the IH heating module shown;

[0068] Figure 7 for Figure 4 The diagram shown is a bottom view of the IH heating module.

[0069] Figure 8 for Figure 4 A three-dimensional schematic diagram of the coil disk assembly, with the bottom of the coil disk facing upwards;

[0070] Figure 9 for Figure 4 A three-dimensional schematic diagram of the coil disk assembly, with the top of the coil disk facing upwards;

[0071] Figure 10 for Figure 1 An exploded three-dimensional diagram of the pot body of the electromagnetic heating cooking appliance shown;

[0072] Figure 11 for Figure 1 A front view schematic diagram of an example control panel of an electromagnetic heating cooking appliance;

[0073] Figure 12 for Figure 1 A front view schematic diagram of another example of the control panel of an electromagnetic heating cooking appliance.

[0074] Explanation of reference numerals in the attached figures:

[0075] 100: Cooking utensils

[0076] 200: Cover

[0077] 300: Cooking containers

[0078] 400: Control device

[0079] 401: Third connecting hole

[0080] 500: Base

[0081] 600: IH heating module

[0082] 601: Top Frame

[0083] 602: Fixture

[0084] 603: Coil

[0085] 604: Bearing

[0086] 605: Temperature sensor

[0087] 606: First coil

[0088] 607: Mounting Socket

[0089] 608: Magnetic strip

[0090] 609: First Gear

[0091] 610: Chassis frame

[0092] 611: Second Gear

[0093] 612: Magnetic shield

[0094] 613: Electric motor

[0095] 614: First main cable

[0096] 615: Second main cable

[0097] 616: Screw

[0098] 617: Screws

[0099] 618: Screws

[0100] 619: Screws

[0101] 621: Analog coil texture

[0102] 622: Circling Space

[0103] 627: Bezel

[0104] 628: First connecting hole

[0105] 629: Second connecting hole

[0106] 630: Roller

[0107] 631: Spring

[0108] 632: Positioning slot

[0109] 633: Groove

[0110] 634: Second coil

[0111] 635: Axial protrusion

[0112] 690: Visible surface

[0113] 700: Claypot

[0114] 701: Medium plate

[0115] 702: Connecting Post

[0116] 703: Inner cylinder

[0117] 800: Coil Disc Assembly

[0118] 900: Control Panel

[0119] 901: First indicator light

[0120] 902: Second indicator light Detailed Implementation

[0121] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0122] To fully understand this application, a detailed description will be provided in the following description. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other embodiments.

[0123] Ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Moreover, for example, the term “first component” does not imply the existence of a “second component”, and the term “second component” does not imply the existence of a “first component”.

[0124] It should be noted that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this application are for illustrative purposes only and are not intended to be limiting.

[0125] This application discloses an electromagnetic heating cooking appliance.

[0126] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings.

[0127] like Figures 1 to 3As shown, an electromagnetic instant heating cooking appliance 100 according to a specific embodiment of this application includes a pot body 700, a lid 200, and a base 500. The pot body 700 is used for cooking and heating, and includes, for example, a cooking container 300 for holding food and an electromagnetic heating module 600 (IH heating module 600) for heating the cooking container 300. The cooking container 300 is removably disposed in the receiving cavity of the pot body 700. The IH heating module 600 is disposed, for example, at the bottom of the receiving cavity. Thus, the cooking container 300 and the electromagnetic heating module 600 are detachably placed in the magnetically inductive area of ​​the electromagnetic heating module 600. The base 500 is connected to the pot body 700. The lid 200 is connected to the pot body 700 and is used to close the pot body 700. For example, the lid 200 can be flipped upwards to open the pot body 700 and flipped downwards to close the pot body 700.

[0128] like Figures 4 to 7 As shown, the IH heating module 600 includes a coil assembly 800. The coil assembly 800 includes a coil 603 and a coil. The coil 603 is located at the uppermost position of the IH heating module 600, facing the cooking container 300. After the cooking container 300 is removed from the pot body, the user can directly see the coil 603. The coil 603 is bowl-shaped, its shape adapted to the bottom shape of the cooking container 300. The coil is disposed on the bottom surface (lower surface) of the coil 603. When the coil is energized, it generates an alternating magnetic field, which can induce electromagnetic induction with the cooking container 300 of the cooking appliance 100, causing the cooking container 300 to be heated, thereby heating the food inside the cooking container 300. The central axis of the coil 603 is also the central axis P1 of the electromagnetic heating module 600. The central axis of the coil 603 is also the central axis of the coil assembly 800.

[0129] In this application, the magnetic field strength of the alternating magnetic field generated by the coil is non-uniformly distributed along the circumferential direction of the coil disk 603. In areas with strong magnetic field strength, the eddy currents in the container wall of the cooking container 300 are large, resulting in high heat generation; in areas with weak magnetic field strength, the eddy currents in the container wall of the cooking container 300 are small, resulting in low heat generation. When the cooking container 300 is placed in the magnetically inductive area, the cooking container 300 and the electromagnetic heating module 600 are substantially coaxial. The cooking appliance 100 is configured such that at least a portion of the cooking container 300 and the electromagnetic heating module 600 are relatively rotatable about a coaxial axis, thereby allowing relative rotation between the cooking container 300 and the alternating magnetic field about a coaxial axis. For example, during cooking, the cooking container 300 and the coil 603 are essentially coaxial. The cooking appliance 100 allows the cooking container 300 and the coil 603 to rotate relative to each other around a common axis (described in detail later). This also means that the cooking container 300 and the magnetic field rotate relative to each other around a common axis, ensuring that all circumferential positions of the cooking container 300 are evenly affected by the magnetic field, thus achieving uniform heating. This heating method can be understood as a multi-point heat source rotation heating method. Each strong magnetic region forms a heat source.

[0130] For example, the alternating magnetic field generated by the coil of the coil assembly 800 has N alternating strong magnetic regions and N weak magnetic regions along the circumferential direction of the coil disk 603. The magnetic field strength of the strong magnetic regions is greater than that of the weak magnetic regions, so the coil disk assembly can provide N heat sources, where N is a positive integer. Preferably, the alternating magnetic field generated by the coil of the coil assembly 800 is rotationally symmetrical about the central axis of the coil disk 603 at 360 / N degrees.

[0131] For example, such as Figure 8 and Figure 9 As shown, the coil of the coil assembly 800 includes a first coil 606. The coil assembly 800 may include only one first coil 606, wherein the first coil 606 is not concentrically arranged with the coil disk 603. "Not concentric" means that the spiral center of the winding of the coil 606 is not collinear with the central axis of the coil disk 603. Alternatively, the coil assembly 800 may include multiple first coils 606, all of which are spaced apart along the circumferential direction of the coil disk 603, for example, spaced at equal intervals, so that each first coil 606 is not concentrically arranged with the coil disk 603. Three first coils 606 are shown in the figure. Multiple first coils 606 can be connected in series, which can be considered as being made by winding a single enameled wire, so that multiple first coils 606 can be energized and de-energized simultaneously.

[0132] The magnetic field strength is strong where coil 606 is located, and weak between two coils 606. By setting non-concentric coils, the cooking appliance 100 can achieve a multi-point heat source rotation heating effect, thereby realizing a variable heating convection pattern. This enables complex and varied convection and tumbling patterns and effects inside the cooking container 300, resulting in more even heating of food and improving the undesirable phenomenon of rice being either too mushy or too dry in certain areas after cooking.

[0133] To enable users to perceive (experience) the multi-point heat source rotation heating technology of the cooking appliance 100, the IH heating module 600 also includes a visible structure. This visible structure is positioned at a location corresponding to the strong magnetic area of ​​the alternating magnetic field to indicate the location of the strong magnetic area. A visible structure is one that is visually perceptible and can be intuitively seen by the user. That is, the visible structure allows the user to see the location of the strong magnetic area. For example, this visible structure is exposed when the cooking container 300 is moved out of the magnetically inductive area of ​​the electromagnetic heating module 600. Thus, the user can easily see this visible structure every time they pick up or place the cooking container 300.

[0134] For example, such as Figure 3 As shown, the coil assembly 800 has a visible surface 690, on which a visible structure is provided. The location and / or area of ​​the visible structure corresponds to the location and / or area of ​​the coil 606. For example, a visible structure is provided at the location of the first coil 606 on the coil 603 to indicate the position of the coil 606 to the user. As the name suggests, the visible surface 690 is a surface that can be seen by the user, so the visible structure can be seen by the user, that is, it is exposed. The visible structure can be perceived by the user visually; that is, the location of the first coil 606 on the coil 603 has a unique visual effect and can be intuitively perceived by the user.

[0135] For example, the visible structure could be that at least the portion of the coil disk 603 corresponding to the coil 606 is transparent, allowing the user to directly see the coil 606. Alternatively, the visible structure could be that the visual effect of the portion of the coil disk 603 corresponding to the coil 606 differs from other portions, for example, by having a unique color, shape, or pattern. For instance, the upper surface of the portion of the coil disk 603 corresponding to the coil 606 could be provided with a simulated coil texture 621 (simulating the coil 606, see [link]). Figure 4 The simulated coil texture 621 is clearly visible from the top of the coil disc 603, visually indicating the location of the coil 606 to the user. Alternatively, the visible structure can be a detachable portion of the coil disc 603 corresponding to the coil 606, allowing the coil 606 to be exposed. In this case, the detachable structure (e.g., clips, grips, etc.) of the portion of the coil disc 603 corresponding to the coil 606 has a distinct visual effect (a visual effect different from the surrounding area), which can alert the user.

[0136] For example, the visible structure is a structure that protrudes from the visible surface 690, for example, protruding 1mm to 5mm from the visible surface 690. Thus, the visible structure makes the technical setting information visible, and also allows the sensing distance between the heated pot wall of the cooking container 300 and the coil 606 to be flexibly set within an optimal range.

[0137] Of course, the visible structure can also be any other structure or design that indicates the location of the coil 606. Furthermore, multiple visible structures can be used simultaneously. Through the visible structure, users can directly or indirectly observe the coil when they turn on the IH cooking appliance 100. The number and shape of the coil, and other structural features, can be directly or indirectly observed by the user. Users can intuitively perceive the difference between the product they are using and other types of products on the market, perceive the improvements in IH cooking appliances, and enhance the user experience.

[0138] like Figure 8 and Figure 9 As shown, the coil plate 603 is provided with a positioning groove 632 protruding towards the cooking container 300 of the cooking appliance 100. The first coil 606 is disposed on the bottom surface of the coil plate 603 and located in the positioning groove 632. The top of the positioning groove 632 protrudes from the upper surface of the body of the coil plate 603, forming a boss structure. By providing the positioning groove 632 on the coil plate 603, it is convenient to install and position the first coil 606, and it can prevent the first coil 606 from moving on the bottom surface of the coil plate 603, thereby improving the stability of the first coil 606.

[0139] For example, the coil disk 603 can be made entirely transparent, or the positioning groove 632 can be made transparent. The transparent part can be made of materials such as transparent glass, transparent plastic, or transparent acrylic. By making the coil disk 603 or the positioning groove 632 transparent, the first coil 606 can be directly observed, and the structural features such as the number and shape of the first coil 606 can be directly observed by the user.

[0140] like Figure 3 and Figure 9 As shown, the upper surface of the portion of the positioning groove 632 protruding towards the cooking container 300 is provided with a simulated coil pattern 621. The spiral winding pattern of the simulated coil pattern 621 corresponds to the coiled structure of the first coil 606. The coil disc 603 can be opaque at this time. The simulated coil pattern 621 can be set on the top of the positioning groove 632, i.e., the side facing the cooking container 300, through die casting, printing, spraying, inlaying, or other methods. By setting the simulated coil pattern 621 on the positioning groove 632, the user can also intuitively perceive the shape and structure of the first coil 606.

[0141] like Figures 5 to 7As shown, the coil assembly 800 also includes a mounting base 607, which is disposed in a positioning groove 632, and the first coil 606 is disposed in the mounting base 607. The mounting base 607 and the coil 603 can be connected by screws to achieve fixation in the positioning groove 632. The mounting base 607 can be constructed as a sandwich structure, providing at least one layer of winding space 622 for the user to wind the first coil 606; that is, each sandwich layer is a winding space 622 for winding the coil. By placing the first coil 606 in a coiled state in the mounting base 607, it is easier to assemble the first coil 606 on the coil 603, and it can also effectively prevent the first coil 606 from falling apart, thus improving the stability of the first coil 606 itself.

[0142] like Figures 5 to 7 As shown, the coil assembly 800 also includes a magnetic guiding device 608, which is disposed on the bottom surface of the mounting base 607 (located below the interlayer) and corresponding to the first coil 606. The magnetic guiding device 608 guides the magnetic field generated when the first coil 606 is energized. By providing the magnetic guiding device corresponding to the first coil 606, the electromagnetic field generated by the energized first coil 606 can be guided to converge towards the cooking container 300 of the cooking appliance 100, thereby improving heating efficiency.

[0143] The magnetic guiding device 608 may include an annular magnetic strip, or multiple I-shaped or L-shaped magnetic strips, all of which are arranged in a star shape, such as a cross shape. The magnetic strips are fixed to the mounting base 607 by snap-fit. By providing an annular magnetic strip or multiple magnetic strips 608 corresponding to the first coil 606, the magnetic field generated by the energized first coil 606 can be guided to act evenly on the cooking container 300 of the cooking appliance 100, which helps to achieve uniform heating of the cooking container 300 itself, ensuring that the food is heated evenly and improving the cooking effect.

[0144] like Figure 5 and Figure 6 As shown, the coil assembly 800 also includes a second coil 634, which is concentrically arranged with the coil disk 603. "Concentric" means that the spiral center of the coil 634's winding is collinear with the central axis of the coil disk 603. The number of second coils 634 is determined by the required IH heating power. The figure shows three first coils 606 and one second coil 634, which are connected in series and can be considered as being made by winding a single enameled wire. The coil disk 603 has an axial protrusion 635 in the middle, facing the base 500, around which the second coil 634 can be wound. By using concentric coils, the cooking appliance 100 can achieve multi-point heat source heating, resulting in more even heating of food.

[0145] like Figures 4 to 7As shown, the coil assembly 800 also includes a transmission device (e.g., a first gear 609) connected to the coil 603. The transmission device is used to connect to a drive device to drive the coil 603 to rotate. Thus, in the illustrated example, the cooking appliance 100 is configured such that an alternating magnetic field rotates around the cooking container 300. The first coil 606, the second coil 634, the mounting base 607, the magnetic guide device 608, the first gear 609, and the coil 603 are assembled to form the coil assembly 800, which can form an independent module. The components have high installation precision, facilitating assembly in the cooking appliance 100, ensuring the normal operation of the cooking appliance 100, and improving the user experience.

[0146] The structure of components such as enameled wire, magnetic strip, and mounting base 607 can be adjusted according to the IH heating power, coil heat dissipation, electromagnetic field strength, and number of point heat sources.

[0147] The coil assembly 800 is disposed at least below the cooking container 300 and coaxial with the cooking container 300. Since the coil 603 is bowl-shaped, it can extend to the side wall of the cooking container 300, while the first coil 606 also extends to the side wall of the cooking container 300, so that the coil assembly 800 can heat the bottom wall and at least part of the side wall of the cooking container 300.

[0148] like Figures 4 to 6 As shown, the IH heating module 600 includes the aforementioned coil assembly 800, chassis frame 610, transmission device, and drive device.

[0149] The coil disk 603 of the coil disk assembly 800 is mounted on the chassis frame 610 and can rotate on the chassis frame 610. The chassis frame 610 is a component that supports the various functional components within the IH heating module 600. A transmission device is connected to the coil disk 603. A drive device is mounted on the chassis frame 610 and connected to the transmission device, enabling it to drive the coil disk 603 to rotate.

[0150] like Figure 2 , Figure 4 and Figure 5 As shown, the IH heating module 600 also includes a top frame 601, which is disposed on top of the base frame 610. The edge of the top frame 601 is provided with a second connecting hole 629, and the edge of the base frame 610 is correspondingly provided with connecting ears. The top frame 601 and the base frame 610 can be connected by screws 619. By providing the top frame 601, the internal structure of the cooking appliance 100 can be improved, facilitating the installation of other functional components on top of the base frame 610 as needed.

[0151] like Figure 3 and Figure 10As shown, the cooking appliance 100 also includes a middle plate 701 and an inner pot 703.

[0152] A middle plate 701 is located at the top of the pot body 700, and connects to the top frame 601 of the IH heating module 600. The middle plate 701 has multiple connecting posts 702 extending towards the base frame 610. The edge of the top frame 601 has corresponding first connecting holes 628. The connecting posts 702 are connected to the first connecting holes 628 by screws, thus connecting the top frame 601 to the middle plate 701, and consequently, connecting the IH heating module 600 to the middle plate 701. By using the middle plate 701, the IH heating module 600 is connected to the pot body 700, and the IH heating module 600 remains fixed within the pot body 700, ensuring the cooking effect of the cooking appliance 100.

[0153] In this embodiment, the IH heating module 600 is composed of multiple main functional components such as the coil plate 603, coil, chassis frame 610, transmission device, and drive device into a single module. It can be installed using the middle plate 701 of the cooking appliance, thus being independent of the base 500 of the cooking appliance and no longer affected by the installation accuracy of the base 500. The multiple components of the IH heating module have high installation accuracy, which facilitates assembly in the cooking appliance 100, ensures the normal operation and cooking effect of the cooking appliance 100, and improves the user experience.

[0154] The inner cylinder 703 is positioned between the middle plate 701 and the top frame 601 of the IH heating module 600, and surrounds the cooking container 300. By setting the inner cylinder 703, the heat radiation from the cooking container 300 can be reflected back to the cooking container 300, isolating the heat generated by the cooking container 300 from leaking out and preventing the pot body 700 from overheating. This improves both the heat preservation effect of the cooking container 300 and the safety of the cooking appliance 100.

[0155] like Figure 5 ,to Figure 7 As shown, the IH heating module 600 also includes a temperature sensor 605 and a mounting bracket 602. The temperature sensor 605 is located in the middle of the base frame 610, and its top passes through the coil 603 to elastically contact the cooking container 300 of the cooking appliance 100. The mounting bracket 602 is connected to the base frame 610 and is used to limit the position of the temperature sensor 605. The mounting bracket 602 and the base frame 610 can be snapped or threaded together, and neither the mounting bracket 602 nor the temperature sensor 605 can rotate. A through hole is provided in the middle of the coil 603 corresponding to the temperature sensor 605 and the mounting bracket 602.

[0156] The temperature sensor 605 can be an NTC type temperature sensor. A spring 631 is provided below the temperature sensor 605. The lower end of the spring 631 is supported on the base frame 610, and the upper end of the spring 631 pushes the temperature sensor 605, so that it can elastically contact the cooking container 300 to ensure the temperature measurement effect.

[0157] By setting the fixing bracket 602 to limit the temperature sensor 605, the temperature sensor 605 can be assembled with the chassis frame 610 and become a component in the IH heating module 600, thereby improving the system integrity of the IH heating module 600.

[0158] like Figures 5 to 7 As shown, the driving device of the IH heating module 600 includes, for example, a motor 613 and a magnetic shielding cover 612. The motor 613 can be a stepper motor. The magnetic shielding cover 612 covers the motor 613 to isolate electromagnetic interference between the motor 613 and the coil. Through stepper motor rotation control and transmission, the coil disc 603 can achieve forward and reverse rotation, intermittent rotation, and stepless speed regulation. Because the motor 613 and the coil are close together, the magnetic shielding cover 612 isolates electromagnetic interference between them, preventing damage to the motor 613 or the coil and improving the stability of the cooking appliance 100. The magnetic shielding cover 612 can be made of materials with magnetic shielding properties, such as aluminum or copper.

[0159] The transmission mechanism of the IH heating module 600 may include a first gear 609 and a second gear 611. The first gear 609 is connected to the coil disk 603 and can be sleeved on the axial protrusion 635. The second gear 611 is connected to the shaft of the motor 613 and meshes with the first gear 609 for transmission. The first gear 609 and the second gear 611 can be hollowed out to reduce the product weight. By using a gear pair, it is easy to set up in a very small space, and the driving force of the motor 613 can be transmitted to the coil disk 603 at various preset transmission ratios.

[0160] The first gear 609 and the second gear 611 can be non-metallic gears. Specifically, they can be made of plastic materials, such as POM, GFPP, PBT, PA66, etc. This design preferably uses POM material. Since the gear pair is close to the coil, setting the gear pair as non-metallic gears can avoid electromagnetic induction with the coil.

[0161] The gear ratio between the second gear 611 and the first gear 609 can be any of 1:1, 1:2, 1:3, or 1:4; considering product space layout, a gear ratio of 1:3 is preferred for easy stepper motor speed adjustment and rotation angle control. The rotational speed range of the coil 603 is, for example, 0.1 r / min to 10 r / min. A preferred speed is 1 r / min. Selecting a suitable integer multiple of the gear ratio for the gear pair facilitates speed adjustment and rotation angle control of the motor 613. When selecting a suitable rotational speed range for the coil 603, its speed should not be too fast or too slow. Excessive speed can cause abnormal rotational noise. Insufficient speed results in slow heat source switching, increasing cooking time.

[0162] In this application, since the first gear 609 is connected to the coil disk 603, the two can be integrally formed (e.g., injection molded). Therefore, the first gear 609 can also be regarded as part of the coil disk assembly 800, while the transmission device of the IH heating module 600 only includes the second gear 611.

[0163] like Figure 2 , Figure 4 and Figure 5 As shown, the IH heating module 600 also includes a bearing 604, which is located in the middle of the chassis frame 610 and supports the rotation of the coil disk 603. A bearing seat is provided in the middle of the chassis frame 610 for mounting the bearing 604, and an axial protrusion 635 is provided in the middle of the coil disk 603 facing the base 500, which is connected to the bearing 604. By providing the bearing 604 in the middle of the chassis frame 610 to support the rotation of the coil disk 603, the stability of the coil disk 603's rotation relative to the chassis frame 610 is improved, avoiding eccentric rotation and affecting the fit between mechanisms.

[0164] Bearing 604 is a non-metallic bearing, which can be made of plastic, ceramic, or other non-metallic materials. Because bearing 604 is close to the coil, using a non-metallic bearing 604 avoids electromagnetic induction between them.

[0165] like Figure 2 and Figure 4 As shown, a radially protruding retaining ring 627 is provided on the inner sidewall of the top frame 601. The retaining ring 627 is used to block the gap between the outer edge of the coil 603 and the chassis frame 610. By providing the retaining ring 627 to block the gap between the outer edge of the coil 603 and the chassis frame 610, foreign objects can be prevented from getting stuck in the gap or entering the chassis frame 610, ensuring smooth rotation of the coil 603 and reliable operation of the drive device and transmission device.

[0166] like Figure 2As shown, the IH heating module 600 also includes rollers 630, which are disposed between the chassis frame 610 and the top frame 601. Figure 5 As shown, a groove 633 is provided on the outer edge of the coil disk 603. The outer edge of the coil disk 603 is connected to the roller 630 through the groove 633 and is supported and rotated by the roller 630. By providing the roller 630 support on the outer edge of the coil disk 603, the rotational stability of the coil disk 603 is improved, avoiding eccentric rotation and heat-induced warping deformation, and ensuring smooth rotation of the coil disk 603.

[0167] like Figure 1 , Figure 2 , Figures 5 to 7 , Figure 10 As shown, the cooking appliance 100 also includes a control device 400, which can control the electrical components in the cooking appliance 100, such as coils 606 and 634, motor 613, indicator lights 901 and 902, etc. The control device 400 is connected to the chassis frame 610 and is electrically connected to the coils and other electrical components via cables. A third connection hole 401 is provided on one side of the control device 400, which can be connected to the chassis frame 610 by screws. By connecting the control device 400 to the chassis frame 610, the control device 400 can be assembled with the IH heating module 600, making it a component of the IH heating module 600, thus improving the system integration of the IH heating module 600.

[0168] By adopting the IH heating module 600, it is easy to assemble in the cooking appliance 100, and the components have high installation precision, which ensures the normal operation of the cooking appliance 100 and improves the user experience.

[0169] In summary, the electromagnetic heating module 600 is constructed such that the alternating magnetic field has N strong magnetic regions and N weak magnetic regions alternately distributed along the circumferential direction of the electromagnetic heating module 600, wherein the magnetic field strength of the strong magnetic regions is greater than that of the weak magnetic regions. Preferably, the N strong magnetic regions and the N weak magnetic regions are equally spaced along the circumferential direction of the electromagnetic heating module 600. The electromagnetic heating cooking appliance 100 is constructed such that, when the cooking container 300 is at least above the electromagnetic heating module 600, at least a portion of the electromagnetic heating module 600 and one of the cooking container 300 are rotatable relative to the other. Considering the limited length of the cable, the range of the relative rotation angle is, for example, 360 / N degrees (±180 / N degrees), thereby ensuring that no part of the cooking container 300 is missed during heating, and that the cooking container 300 is heated comprehensively and evenly. In the illustrated embodiment, N = 3.

[0170] The relative rotation between the cooking container 300 and the magnetic field can occur when the first coil 606 is energized. That is, the magnetic field of the electromagnetic heating module 600 rotates while simultaneously heating the cooking container 300, ensuring uniform heating and reducing the horizontal temperature difference between different parts of the cooking container 300 on the same horizontal plane. Alternatively, the relative rotation between the cooking container 300 and the magnetic field can occur alternately with the energization of the first coil 606; that is, rotation occurs without heating, and heating occurs without rotation. This reduces the vertical temperature difference on the same vertical plane at each circumferential position, achieving uniform heating in one revolution. Alternatively, the heating sequence and the rotation sequence can be controlled independently. In this application, regardless of whether rotation and heating occur simultaneously, uniform heating is achieved by changing the heating position through rotation.

[0171] The cooking process of the cooking appliance 100 includes, for example, a water absorption process, a boiling process, a maintaining-boil process, a simmering process, and a heat preservation process. In the water absorption process, the ingredients fully absorb water in warm water (for example, the temperature at the bottom of the cooking cavity is maintained at 30-70°C, also known as the water absorption temperature) to improve texture. Typically, the water absorption process lasts for a preset duration (e.g., 1-90 minutes). The average heating power of the water absorption process does not exceed, for example, 1000W. To save cooking time, a short period of full-power heating can be performed first, followed by stopping the heating. The cooking appliance 100 also supports cold water soaking and / or hot water cooking. When soaking in cold water, the electromagnetic heating module 600 does not operate during the water absorption process. When cooking with hot water, the water initially added to the cooking cavity is hot water, and the water absorption process can be omitted or the electromagnetic heating module 600 can be deactivated during the water absorption process.

[0172] In the boiling stage, the cooking appliance 100 heats the food to near-boiling temperature using high heat (e.g., the temperature at the top of the cooking chamber is 70-90°C, also known as the boiling temperature), and then maintains boiling in the sustaining stage to ensure the food is basically cooked. The average heating power of the boiling stage is, for example, 400-2000W, and full power heating is possible. In some cases, such as in high-altitude environments, where the temperature rise in the cooking chamber is limited, the sustaining stage can be initiated after the boiling stage has lasted for a preset boiling time (not exceeding 40 minutes).

[0173] The boiling process can continue for a preset boiling time (e.g., 4-40 minutes), or proceed to the next process when the heating temperature of the cooking cavity reaches a preset boiling temperature (e.g., 100-130°C). The average heating power of the boiling process is, for example, 200-1000W.

[0174] The braising process dries out any remaining free moisture, further cooking the ingredients. This process can continue for a preset braising time (e.g., 2-20 minutes) and maintain the food temperature within a certain range, such as 100-130°C at the bottom of the cooking cavity, also known as the braising temperature. Alternatively, the braising process can proceed to the next step when the cooking cavity reaches the preset braising temperature (e.g., 120-140°C at the bottom of the cooking cavity). The average heating power of the braising process is, for example, 100-1000W.

[0175] Finally, a low heat is used to keep the food warm during the heat-keeping process, ensuring the user can enjoy hot food. This heat-keeping process typically maintains the food temperature at a set temperature (e.g., 40-80°C at the bottom of the cooking cavity). This process usually lasts for a relatively long time (e.g., at least 30 minutes) and is ended manually. The average heating power of the rice-cooking process is, for example, 100-1000W.

[0176] The cooking process of cooking porridge or soup using cooking appliance 100 includes, for example, a water absorption process, a boiling process, a boiling maintenance process, and a heat preservation process. Compared to the cooking process of cooking rice, when cooking porridge or soup, the boiling maintenance process usually lasts for a preset boiling time (e.g., 8-60 minutes), and the heating temperature of the cooking cavity is controlled during this period to prevent overflow.

[0177] In each process, the electromagnetic heating module 600 (specifically, the electromagnetic coil 606), which serves as the heating device, can operate in a power-adjustable mode. In each power-adjustment cycle, the electromagnetic coil 606 is energized for a preset energizing time and de-energized for a preset de-energizing time; the sum of the preset energizing and de-energizing times constitutes the duration of one power-adjustment cycle. Due to different cooking objectives or effects, the average power of each process may differ; for example, the preset energizing time may vary between different processes. Also, because the cooking cavity may have temperature requirements in each process, the power of the electromagnetic heating module 600 may not be constant (the preset energizing time may differ between different power-adjustment cycles within the same process), and it may not be constantly in operation (in this text, the electromagnetic heating module 600 during a power-adjustment cycle is considered to be in operation).

[0178] like Figure 11 and Figure 12As shown, the cooking appliance 100 further includes an operation panel 900 (human-computer interaction device), and the operation panel 900 is, for example, provided on the lid 200. The operation panel 900 is provided with a first indicator light 901, and the first indicator light 901 is used to indicate information about the relative rotation between the alternating magnetic field of the first coil 606 and the cooking container 300. For example, when the coil disk assembly 800 rotates, the indicator light 901 lights up, and when the coil disk assembly 800 stops rotating, the indicator light 901 goes out. By providing the indicator light 901 corresponding to the coil disk assembly 800 on the operation panel 900, the user can intuitively perceive the working state of the IH cooking appliance 100 during cooking. The optical signal of the first indicator light 901 is emitted from the upper surface of the lid 200, that is, the operation panel 900 is located on the upper surface of the lid 200.

[0179] The number of the first indicator lights 901 can be the same as the number of the strong magnetic regions of the electromagnetic heating module 600. All the first indicator lights 901 are arranged at intervals on the same circle, for example, arranged at equal intervals on the circle.

[0180] The operation panel 900 may further be provided with a second indicator light 902, and the second indicator light 902 is used to indicate at least information about whether the coils 606 and / or 634 are powered on, that is, to indicate information about heating. For example, when the second indicator light 902 lights up, it means power-on heating, and when the second indicator light 902 goes out, it means no power-on and no heating. The shape of the optical signal of the first indicator light 901 is different from the shape of the optical signal of the second indicator light 902 to make the two clearly distinguishable. The optical signal of the second indicator light 902 is also emitted from the upper surface of the lid 200, for example.

[0181] Different from the indicator light functions of existing technology products, the indicator light scheme of this embodiment is more intelligent, combines the display effect with the function of multi-point heat source rotation heating, and can realize the linkage between the heat source rotation action, the heat source heating action and the indicator light display. Moreover, according to different cooking stages, the indicator lights can also reflect different heating states in each cooking stage.

[0182] The number of the first indicator lights 901 and the number of the second indicator lights 902 can be the same as the number of the first coils 606. All the first indicator lights 901 and the second indicator lights 902 are arranged alternately on the same circle, for example, arranged at equal intervals on the circle. The optical signal of the second indicator light 902 presents the display effect of a coil (spiral winding), for example. Thus, the second indicator light 902 can intuitively reflect the characteristics of the multi-point heat source. The optical signal of the first indicator light 901 presents the display effect of an arrow, for example, so as to intuitively indicate the direction of relative rotation. For example, when the relative rotation between the alternating magnetic field and the cooking container 300 occurs, the cooking appliance 100 sequentially lights up all the first indicator lights 901 in a cyclic manner along a fixed circumferential direction, presenting the effect of the light making a circular motion.

[0183] The first indicator light 901 and the second indicator light 902 can each have multiple lighting modes, and their combination can convey a variety of information. For example, the first indicator light 901 and the second indicator light 902 can have different lighting modes at different cooking stages.

[0184] For example, during the water absorption stage of the ingredients, the heating power is low or the heating time is short, and the cooking container 300 and the magnetic field do not rotate relative to each other. In this case, indicator lights 901 and 902 may be off or flashing. Then, during the boiling stage, intermittent rotating heating is used. At this time, the rotating arrow symbol of indicator light 901 illuminates intermittently corresponding to the rotation of the heat source (relative position of the strong magnetic area), and the coil symbol of indicator light 902 illuminates intermittently corresponding to the heating of the heat source. The brightness of indicator light 902 varies with the heating power; the brighter the brightness, the greater the cooking heating power. Then, during the boiling maintenance stage, similar to the boiling stage, the rotating arrow symbol of indicator light 901 and the coil symbol of indicator light 902 illuminate accordingly based on the rotation and heating control of the heat source. Finally, during the simmering and keeping warm stages, continuous rotating heating is used. At this time, the rotating arrow symbol of indicator light 901 and the coil symbol of indicator light 902 can illuminate in a breathing light style to indicate to the user that the cooking is in a state of continuous rotation and heating. When the machine is off or in standby mode, indicator lights 901 and 902 are off.

[0185] Optionally, the second indicator light 902 and the first indicator light 901 can use different colored lights to enhance the user's recognition experience.

[0186] Optionally, the second indicator light 902 and the first indicator light 901 are added with a flashing function. When the heating of the coil 606 or the rotation of the electromagnetic heating module 600 fails, the corresponding indicator light flashes to prompt the user to report the fault.

[0187] exist Figure 12 In the example shown, the cooking appliances 100 each include a first indicator light 901. The first indicator light 901 is designed as a coil symbol, indicating the product's multi-point heating coil design. Each first indicator light 901 can be controlled individually. Each first indicator light 901 can be constructed as an indicator light assembly composed of multiple colors of light to emit different colors of light. For example, sequential flashing of red lights indicates the direction of rotation; flashing of all red lights together indicates that rotation has stopped and heating is on; the light is off when not in use; and a solid green / blue light indicates standby.

[0188] The cover 200 includes a shielding plate that covers indicator lights 901 and / or 902, making them substantially invisible from the outer surface of the cooking appliance 100 when they are not illuminated. This results in a cleaner outer surface for the cooking appliance 100. The shielding plate can also be understood as the outer shell of the cooking appliance 100. To make the indicator lights visible when illuminated, the shielding plate has a light-transmitting area corresponding to the position of the indicator light. When the indicator light is illuminated, the light signal from the indicator light is emitted from the light-transmitting area, and the shape of the light signal corresponds to the shape of the light-transmitting area. Figure 11 and Figure 12 The arrows and coils in the diagram represent the shapes of the light-transmitting areas. These light-transmitting areas are, for example, transparent or semi-transparent sections of a mask, while other parts of the mask are opaque. Indicator lights illuminate these light-transmitting areas, allowing the user to see the indicator signal. The mask may be constructed of, for example, coated glass or a plastic lampshade.

[0189] Cooking appliances 100 are not limited to rice cookers; they can also include other types of cooking appliances, such as electric pressure cookers, electric slow cookers, electric hot pots, electric kettles, induction cookers, and other appliances that have the function of heating liquid-solid mixtures.

[0190] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0191] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. An electromagnetic heating cooking appliance, characterized by, The application comprises: a coil disc assembly having a coil disc assembly central axis and a visible surface, the coil disc assembly comprises at least two coils which generate alternating magnetic field when energized, the winding center of the coils is offset from the coil disc assembly central axis, so that all the coils are distributed along the circumference of the coil disc assembly central axis, and all the coils are rotatable as a whole around the coil disc assembly central axis, the visible surface is provided with a dominant structure, the position and / or area of the dominant structure corresponds to the position and / or area of the coils; and a cooking container for being placed in the magnetically inductive area of the coil disc assembly in a separable manner, wherein, when the cooking container is placed in the magnetically inductive area, the cooking container is substantially coaxial with the coil disc assembly, and when the cooking container is removed from the magnetically inductive area, the dominant structure is exposed.

2. The electromagnetic heating cooking appliance according to claim 1, characterized in that, The dominant structure is a structure protruding 1mm-5mm from the visible surface.

3. The electromagnetic heating cooking appliance according to claim 1, characterized in that, The coil disc assembly further comprises a coil disc, the coils are arranged on the bottom surface of the coil disc, the central axis of the coil disc is the coil disc assembly central axis, and the coil disc is rotatable around the coil disc assembly central axis, wherein, when the cooking container is placed in the magnetically inductive area, the coil disc is substantially coaxial with the cooking container and located below the cooking container, and when the cooking container is removed from the magnetically inductive area, the coil disc is exposed, and the coil disc is provided with the dominant structure.

4. The electromagnetic heating cooking appliance according to claim 3, characterized in that, The dominant structure comprises: at least a part of the coil disc corresponding to the coils is transparent, so that the coils can be observed from the top of the coil disc.

5. The electromagnetic heating cooking appliance according to claim 3, characterized in that, The dominant structure comprises: the visual effect of the part of the coil disc corresponding to the coils is different from other parts.

6. The electromagnetic heating cooking appliance according to claim 5, characterized in that, The part of the coil disc corresponding to the coils is detachable, so that the coils can be exposed, and the structure for detachment has a visual effect different from the periphery.

7. The electromagnetic heating cooking appliance according to claim 5, characterized in that, The dominant structure is configured as simulated coil lines arranged on the upper surface of the part of the coil disc corresponding to the coils.

8. The electromagnetic heating cooking appliance according to claim 3, characterized in that, The coil disc is provided with a positioning groove protruding towards the cooking container, and the coils are arranged on the bottom surface of the coil disc and located in the positioning groove.

9. The electromagnetic heating cooking appliance according to claim 8, characterized in that, The dominant structure comprises: the coil disc as a whole is transparent or at least a part of the positioning groove is transparent.

10. The electromagnetic heating cooking appliance according to claim 8, characterized in that, The dominant structure comprises: the surface of the side of the groove bottom of the positioning groove for protruding towards the cooking container is provided with simulated coil lines.

11. The electromagnetic heating cooking appliance according to claim 10, characterized in that, The spiral winding pattern of the simulated coil lines corresponds to the coiled structure of the coils.

12. The electromagnetic heating cooking appliance according to claim 8, characterized in that, The dominant structure comprises: the material of the coil disc is transparent glass or transparent plastic; or the material of the positioning groove is transparent glass or transparent plastic.

13. The electromagnetic heating cooking appliance according to any one of claims 1 to 12, characterized in that, Further comprising: at least one first indicator light for indicating information about the rotation of the coils around the coil disc assembly central axis.

14. The electromagnetic heating cooking appliance according to claim 13, characterized in that, The coil disc assembly comprises N coils, and the electromagnetic heating cooking appliance comprises N first indicator lamps, all of which are arranged on the same circle alternately.

15. The electromagnetic heating cooking appliance according to claim 13, characterized in that, The electromagnetic heating cooking appliance further comprises: a pot body comprising the cooking container and the coil disc assembly; and a cover body for covering the pot body, wherein the first indicator lamps are arranged on the cover body, and the light signals of the first indicator lamps are emitted from the upper surface of the cover body.

16. The electromagnetic heating cooking appliance according to claim 15, characterized in that, The electromagnetic heating cooking appliance further comprises at least one second indicator lamp for indicating information about at least whether the coils are powered on.

17. The electromagnetic heating cooking appliance according to claim 16, characterized in that, The second indicator lamps are arranged on the cover body, and the light signals of the second indicator lamps are emitted from the upper surface of the cover body.

18. The electromagnetic heating cooking appliance according to claim 17, characterized in that, The coil disc assembly comprises N coils, and the electromagnetic heating cooking appliance comprises N first indicator lamps and N second indicator lamps, all of which are arranged on the same circle alternately.

19. The electromagnetic heating cooking appliance according to claim 18, characterized in that, the light signals of the first indicator lamps present a display effect of arrows; and / or the light signals of the second indicator lamps present a display effect of coils.

20. The electromagnetic heating cooking appliance according to claim 18, characterized in that, the colors of the first indicator lamps and the colors of the second indicator lamps are different; and / or the shapes of the light signals of the first indicator lamps and the shapes of the light signals of the second indicator lamps are different.

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