Electromagnetic heating cooking utensil

Abstract

The utility model discloses an electromagnetic heating cooking utensil. The electric cooker comprises a shell, a rotating disc, at least one coil, a cooking container and a position correcting mechanism. The shell forms an accommodating cavity. The rotating disc is arranged in the containing cavity and can rotate around the central axis of the rotating disc relative to the containing cavity. The coil is used for generating an alternating magnetic field after being electrified, the magnetic field intensity of the alternating magnetic field is non-uniformly distributed in the circumferential direction of the turntable, and the turntable rotates around the central axis of the turntable relative to the accommodating cavity, so that the alternating magnetic field rotates around the central axis of the turntable relative to the accommodating cavity. The cooking vessel includes a ferromagnetic material for placement generally coaxially with the carousel within the magnetically inducible region of the coil. Wherein the position correction mechanism is arranged between the turntable and the shell and is used for limiting the position of the turntable relative to the shell. The position correction mechanism can limit the eccentric degree of the turntable, thereby limiting the eccentric degree of the magnetic field.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooking appliances, in particular to an electromagnetic heating cooking appliance. BACKGROUND

[0002] IH cooking appliances are household appliances that directly heat cookware through electromagnetic induction principle. Common IH cooking appliances include induction cookers and electric rice cookers. In the prior art, in order to achieve the three-dimensional heating effect of food materials during cooking and achieve the effect of complex and strong convection heating, multiple independently controlled coils are arranged on the coil disc. The independently controlled heating of different parts of the coil makes the hot and cold regions in the pot variable, that is, different cold and hot regions can form different convection directions at different cooking time periods, so that more than one heat convection rolling state can be generated, thereby achieving the effect of complex and strong convection heating inside the inner pot. Due to the arrangement of multiple independently heated coils, the coil arrangement is difficult, the winding method is complex, the winding process is required to be high, and the structure process of the magnetic strip and the magnetic strip frame is complex, the assembly is difficult, and the overall cost is high. Moreover, the heating position of the coil is fixed, the heating area is limited, and the cooking effect is not ideal.

[0003] Therefore, it is necessary to provide an electromagnetic heating cooking appliance to at least partially solve the above problems. SUMMARY

[0004] A series of simplified concepts are introduced in the summary part, which will be further described in detail in the specific embodiment part. The summary part of the present application does not mean to try to limit the key features and necessary technical features of the claimed technical solution, nor to try to determine the protection scope of the claimed technical solution.

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

[0006] a housing forming a containing cavity;

[0007] a turntable arranged in the containing cavity, the turntable being configured to be rotatable relative to the containing cavity about a central axis of the turntable;

[0008] at least one coil for generating an alternating magnetic field after being energized, the electromagnetic heating cooking appliance being configured such that the magnetic field strength of the alternating magnetic field is non-uniformly distributed in the circumferential direction of the turntable, wherein the rotation of the turntable relative to the containing cavity about the central axis of the turntable causes the alternating magnetic field to rotate relative to the containing cavity about the central axis of the turntable;

[0009] a cooking vessel comprising a ferromagnetic material for being placed substantially coaxially with the turntable within a magnetically inducible area of the coil; and

[0010] a position correction mechanism arranged between the turntable and the housing for limiting the position of the turntable relative to the housing.

[0011] According to the present application, the electromagnetic heating cooking appliance can realize the function of multi-point heat source rotation heating, so that the convection direction of the foodstuff is changed and the foodstuff is evenly heated, thereby improving the cooking quality. The position correction mechanism can correct the position of the turntable relative to the housing, so that the turntable is not seriously eccentric, the magnetic field is not seriously eccentric, and the cooking vessel can be evenly heated.

[0012] Optionally, the position correction mechanism is configured as at least one roller mechanism arranged on either one of the edge portion of the turntable and the housing.

[0013] According to the present application, the position correction mechanism has a simple structure.

[0014] Optionally, the correction mechanism is provided with at least two roller mechanisms, and all the roller mechanisms are arranged at intervals along the circumferential direction of the turntable.

[0015] According to the present application, the plurality of roller mechanisms arranged along the circumferential direction are beneficial to stabilize the rotation of the turntable.

[0016] Optionally, the roller mechanism is used to contact the edge portion of the turntable and / or the housing along the radial direction and / or the axial direction of the turntable.

[0017] According to the present application, the roller mechanism is used to ensure that the position of the turntable is not eccentric during rotation or during the process of carrying the cooking appliance, so as to ensure that the entire mechanism can work normally. By arranging the roller and the corresponding contact structure, the rotation eccentricity of the turntable can be limited, the rotation of the turntable is stabilized, the magnetic field heat source is stabilized, and better cooking effect can be obtained.

[0018] Optionally,

[0019] The roller mechanism comprises a roller, and the maximum gap between the outer surface of the roller and the other one of the edge portion of the turntable and the housing is 0.3-5mm; and / or

[0020] One of the edge portion of the turntable and the housing is arranged with the roller mechanism at least at 3 spaced positions along the circumferential direction of the turntable.

[0021] According to the present application, the rotation eccentricity of the turntable is not more than 0.6-10mm. The at least 3 roller mechanisms arranged along the circumferential direction are beneficial to stabilize the rotation of the turntable.

[0022] Optionally, one of the edge portion of the rotary disc and the side wall of the accommodating cavity is provided with a plurality of the roller mechanisms arranged along the circumferential direction of the rotary disc, the roller mechanisms being used to contact the other of the edge portion of the rotary disc and the side wall of the accommodating cavity along the radial direction and / or the axial direction of the rotary disc.

[0023] According to the present application, the rotary disc and the cavity wall of the accommodating cavity are in close contact, and the effect is more direct and the structure is more compact.

[0024] Optionally, one of the edge portion of the rotary disc and the side wall of the accommodating cavity is provided with a plurality of the roller mechanisms arranged along the circumferential direction of the rotary disc, the roller mechanisms including a roller, an axial direction of the roller being the same as an axial direction of the rotary disc, the other of the edge portion of the rotary disc and the side wall of the accommodating cavity being provided with a groove extending along the circumferential direction of the rotary disc, the groove being used to accommodate the roller.

[0025] According to the present application, the roller and the corresponding contact structure can at least limit the radial eccentricity of the rotary disc.

[0026] Optionally, a maximum distance between an outer surface of the roller at a maximum radial dimension and a groove bottom of the groove along the radial direction of the rotary disc is 0.3-5mm.

[0027] According to the present application, the range of the radial eccentricity of the rotary disc is not more than 0.6-10mm.

[0028] Optionally, the side wall of the accommodating cavity is provided with the roller mechanism, and the edge portion of the rotary disc is provided with the groove.

[0029] According to the present application, the roller is arranged in the housing, so that the installation is more firm. The rotary disc is provided with the groove, and the processing of the rotary disc is easier.

[0030] Optionally, the side wall of the accommodating cavity includes a first side wall and a second side wall arranged along the axial direction, the first side wall being detachably connected to the second side wall,

[0031] One end of a rotating shaft of the roller is connected to the first side wall, and the other end of the rotating shaft of the roller is connected to the second side wall.

[0032] According to the present application, by designing the side wall of the accommodating cavity in a split body, the roller is easy to disassemble.

[0033] Optionally, an inner circumferential surface of the side wall of the accommodating cavity is provided with an annular stop rib, the annular stop rib being located on a side of the rotary disc facing the cooking container.

[0034] According to the present application, the annular ribs can shield the gaps around the rotary disc to prevent foreign matters from entering the gaps and affecting the operation of the rotary disc.

[0035] Optionally, the one of the edge portion of the rotary disc and the side wall of the accommodating cavity is provided with a plurality of the roller mechanisms arranged along the circumferential direction of the rotary disc, the roller mechanism comprising a roller, an axial direction of the roller being perpendicular to the axial direction of the rotary disc, and the other of the edge portion of the rotary disc and the side wall of the accommodating cavity is provided with an annular contact surface extending along the circumferential direction of the rotary disc, the annular contact surface being used to contact an outer circumferential surface of the roller.

[0036] According to the present application, the roller and the corresponding contact structure can limit the eccentricity of the rotary disc in the axial direction.

[0037] Optionally, the annular contact surface comprises a first annular contact surface and a second annular contact surface arranged oppositely along the axial direction of the rotary disc,

[0038] The plurality of rollers are arranged in pairs, the two rollers in each pair being spaced apart along the axial direction of the rotary disc, and the first annular contact surface and the second annular contact surface are located between the two rollers in each pair; or, the plurality of rollers are staggered along the axial direction of the rotary disc, wherein a part of the rollers are used to contact the first annular contact surface, and another part of the rollers are used to contact the second annular contact surface.

[0039] According to the present application, the roller and the corresponding contact structure can limit the eccentricity of the rotary disc in two opposite directions in the axial direction.

[0040] Optionally, the plurality of roller mechanisms are arranged on the side wall of the accommodating cavity, and the surface of the rotary disc comprises the annular contact surface.

[0041] According to the present application, the roller is arranged on the side wall of the accommodating cavity, so that the annular contact surface does not need to be specially designed.

[0042] Optionally, the coil is arranged on the rotary disc, and a winding center of the coil is offset from a central axis of the rotary disc.

[0043] According to the present application, the electromagnetic heating module realizes the non-uniform magnetic field along the circumferential direction of the rotary disc by offsetting the winding center of the coil from the central axis of the rotary disc.

[0044] Optionally, the electromagnetic heating cooking appliance further comprises a mounting frame, the mounting frame forming a part of the housing, the mounting frame comprising:

[0045] a mounting frame bottom wall, the rotary disc being connected to the mounting frame bottom wall and being rotatable relative to the mounting frame bottom wall about a central axis of the rotary disc; and

[0046] Mounting bracket sidewalls extend axially from the edge of the bottom wall of the mounting bracket, forming part of the sidewall of the receiving cavity, and the mounting bracket sidewalls are detachably connected to another part of the housing.

[0047] According to this application, the mounting bracket enables a modular design for the electromagnetic heating device, allowing it to be pre-assembled into a single unit before installation in the cooking appliance. This improves installation accuracy and reduces installation difficulty.

[0048] Optionally, the turntable has a cylindrical portion protruding toward the bottom wall of the mounting frame along the axial direction of the turntable at its approximate central portion, and the bottom wall of the mounting frame has a cylindrical portion protruding toward the turntable along the axial direction of the turntable. The cylindrical portion of the turntable is adapted to and rotatably connected to the cylindrical portion of the mounting frame, such that the cylindrical portion of the turntable is rotatable relative to the cylindrical portion of the mounting frame around the central axis of the turntable.

[0049] According to this application, the mounting bracket and the turntable achieve relative rotation through a matching sleeve connection.

[0050] Optionally, the mounting bracket is provided with an opening for the enameled wire of the coil or its connecting cable to pass through.

[0051] According to this application, the coil is connected to the control device on the side of the mounting bracket away from the coil, which facilitates assembly.

[0052] Optionally,

[0053] The coil is disposed on the side of the turntable facing away from the cooking container; and / or

[0054] The turntable has a C-shaped cross-section.

[0055] According to this application, the coil is located on the side of the turntable facing away from the cooking container, which can hide the coil and protect it. The turntable has a C-shaped cross-section, which can adapt to the bottom shape of the cooking container, allowing the alternating magnetic field to act more effectively on the cooking container.

[0056] Optionally, the electromagnetic heating cooking appliance further includes a coil holder, which is arranged coaxially with the turntable.

[0057] The coil is mounted on the coil frame, and the center of the coil winding is located on the central axis of the coil frame.

[0058] The turntable includes:

[0059] The disc body, which is rotatable relative to the receiving cavity about the central axis of the turntable, and

[0060] at least one first area and at least one second area are arranged on the rotating disc, the first area and the second area are arranged alternately along the circumferential direction of the rotating disc on the disc body, the medium at the first area is different from the medium of the disc body, so that the magnetic field strength of the alternating magnetic field at the first area is different from the magnetic field strength at the second area.

[0061] According to the present application, the electromagnetic heating cooking utensil realizes the non-uniform distribution of the magnetic field along the circumferential direction of the rotating disc by designing the rotating disc with non-uniform medium.

[0062] Optionally, the disc body is made of a metal material with a magnetic permeability less than or equal to 10 B / H, and the first area comprises at least one opening for allowing the magnetic lines of the alternating magnetic field to pass through.

[0063] According to the present application, the first area of the rotating disc can allow the magnetic lines to pass through, while the second area can hardly allow the magnetic lines to pass through, so as to form a magnetic field with non-uniform distribution along the circumferential direction of the rotating disc.

[0064] Optionally, the disc body is made of a first material, and the first area is provided with at least one magnetic line concentrator comprising a second material different from the first material.

[0065] Further, the first material is a non-magnetic material or a metal with a magnetic permeability less than or equal to 10 B / H, and the second material is a metal with a magnetic permeability greater than or equal to 100 B / H.

[0066] According to the present application, by arranging a material different from the disc body in the first area, the magnetic permeability of the first area is different from that of the second area, so as to form a non-uniform magnetic field.

[0067] Optionally,

[0068] The shaft section of the disc holder and the disc body is configured as a generally parallel C-shaped structure; and / or

[0069] The coil is arranged on the side of the disc holder away from the cooking container.

[0070] According to the present application, the shaft section of the disc holder and the rotating disc is configured as a C-shaped structure, which can adapt to the shape of the bottom of the cooking container, so that the alternating magnetic field can better act on the cooking container. The coil is arranged on the side of the disc holder away from the cooking container, which can hide the coil and protect the coil. BRIEF DESCRIPTION OF DRAWINGS

[0071] The following drawings for the present application are hereby incorporated into the present application as part of the present application for the purpose of understanding the present application. The drawings in the present application show representative embodiments of the present application for the purpose of explaining the principles of the present application, but are not intended to limit the present application. In the drawings:

[0072] Figure 1 This is a side cross-sectional schematic diagram of an electromagnetic heating cooking appliance according to the first embodiment of this application;

[0073] Figure 2 for Figure 1 An exploded view of the electromagnetic heating cooking appliance shown, omitting the lid;

[0074] Figure 3 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0075] Figure 4 for Figure 2 A top-view 3D schematic diagram of the electromagnetic heating module in the image;

[0076] Figure 5 for Figure 2 A bottom-view 3D schematic diagram of the electromagnetic heating module in the image;

[0077] Figure 6 for Figure 2 A top view of the electromagnetic heating module, omitting the turntable;

[0078] Figure 7 for Figure 2 A bottom view of the electromagnetic heating module, omitting the mounting bracket;

[0079] Figure 8 for Figure 2 An exploded view of the electromagnetic heating module in the diagram;

[0080] Figure 9 for Figure 2 Another exploded view of the electromagnetic heating module, in which some components are assembled;

[0081] Figure 10 for Figure 2 Another top-view perspective of the electromagnetic heating module, showing the wiring structure;

[0082] Figure 11 for Figure 2 A further exploded diagram of the electromagnetic heating module, in which some components are combined and the protective cover is omitted;

[0083] Figure 12 for Figure 2 A three-dimensional schematic diagram of the retaining ring of the electromagnetic heating module in the image;

[0084] Figure 13 for Figure 2 Enlarged schematic diagram of part B;

[0085] Figure 14 forFigure 2 perspective view of a part of the structure in Fig. 2;

[0086] Figure 15 is Figure 2 perspective view of a part of the structure in Fig. 2, wherein the coil disc is rotated counterclockwise by an angle relative to Figure 14

[0087] Figure 16 is Figure 2 perspective view of a part of the structure in Fig. 2, wherein the coil disc is rotated clockwise by an angle relative to Figure 14

[0088] Figure 17 is a side view schematic of a part of the structure of an electromagnetic heating cooking appliance according to the second embodiment of the present application, wherein the electromagnetic heating module and the cooking vessel are shown, and the mounting frame only shows the part for shafting connection;

[0089] Figure 18 is Figure 17 perspective exploded schematic view of the structure in Fig. 2;

[0090] Figure 19 is a perspective exploded schematic view of the electromagnetic heating module of an electromagnetic heating cooking appliance according to the third embodiment of the present application, wherein the mounting frame only shows the part for shafting connection;

[0091] Figure 20 is a side view schematic of a part of the structure of an electromagnetic heating cooking appliance according to the third embodiment of the present application, wherein the electromagnetic heating module and the cooking vessel are shown, and the mounting frame only shows the part for shafting connection;

[0092] Figure 21 is Figure 20 perspective exploded schematic view of the structure in Fig. 2.

[0093] BRIEF DESCRIPTION OF THE DRAWINGS

[0094] 100: cooking appliance

[0095] 200: cover

[0096] 300: cooking vessel

[0097] 400: control device

[0098] 401: third connecting hole

[0099] 500: base

[0100] 600 / 600A / 600B / 600C: electromagnetic heating module ​​

[0101] 601: stop ring

[0102] 602: blocking structure

[0103] 603: reel

[0104] 604: rotary substructure

[0105] 605: temperature sensor

[0106] 606: electromagnetic coil

[0107] 607: winding reel

[0108] 608: magnetic conductor

[0109] 609: first gear

[0110] 610: mounting bracket

[0111] 611: second gear

[0112] 612: magnetic shield

[0113] 613: motor

[0114] 614: first main cable

[0115] 615: second main cable

[0116] 616 / 617 / 618 / 619: screw

[0117] 620 / 623 / 624: wire clamp

[0118] 621: first clamping groove

[0119] 622: second clamping groove

[0120] 625: motor cable

[0121] 626: temperature sensor cable

[0122] 627: annular stop rib

[0123] 628: first connecting hole

[0124] 629: second connecting hole

[0125] 630: position correction mechanism / roller mechanism

[0126] 631: spring

[0127] 632: positioning groove

[0128] 633: recess

[0129] 635: rotating disc cylindrical portion

[0130] 636: axis of rotation

[0131] 638: roller

[0132] 641: first surface

[0133] 642: second surface

[0134] 643: third surface

[0135] 644: wire passage hole

[0136] 645: mounting bracket cylindrical portion

[0137] 646: connecting lug

[0138] 647: annular wall

[0139] 651: blocking portion

[0140] 652: connecting portion

[0141] 658: mounting bracket notch

[0142] 661: mounting bracket first cylindrical portion

[0143] 662: mounting bracket second cylindrical portion

[0144] 663: mounting bracket third cylindrical portion

[0145] 664: position detection assembly

[0146] 665: first trigger device

[0147] 666: second trigger device

[0148] 667: position detection assembly cable

[0149] 671: mounting bracket side wall

[0150] 672: mounting bracket bottom wall

[0151] 673: mounting slot

[0152] 674: mounting through hole

[0153] 680: spool holder

[0154] 685: spool holder cylindrical portion

[0155] 688: spool holder notch

[0156] 690: turntable

[0157] 691: first region

[0158] 692: second region

[0159] 693: disc body

[0160] 695: magnetic line concentrator

[0161] 696: heat dissipation hole

[0162] 700: pot body

[0163] 701: middle plate

[0164] 702: connecting column

[0165] 703: inner cylinder

[0166] 704: first accommodating cavity

[0167] 705: second accommodating cavity

[0168] 706: second accommodating cavity side wall

[0169] 707: outer shell

[0170] 708: inner shell

[0171] P1: electromagnetic heating module center axis

[0172] P2: cooking container center axis

[0173] P3: rotating disc center axis

[0174] P4: disc wire rack center axis DETAILED DESCRIPTION

[0175] In the following description, numerous specific details are given to provide a thorough understanding of the application. However, it will be apparent that the application can be practiced without one or more of the specific details. In other instances, well-known techniques have not been described in order to avoid obscuring the application.

[0176] For a thorough understanding of the application, reference is made to the following description taken in conjunction with the accompanying drawings. It is apparent that the application can be practiced without one or more of the specific details set forth herein. Certain terminology is used in the description for the purpose of reference only and is not intended to be limiting.

[0177] The ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, 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.” The use of words such as “first,” “second,” and “third” does not indicate any order and can be interpreted as names.

[0178] 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.

[0179] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0180] Unless otherwise stated, the numerical ranges in this document include not only the entire range within its two endpoints, but also the subranges contained therein.

[0181] This application provides an electromagnetic heating cooking appliance.

[0182] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings.

[0183] like Figure 1 and Figure 2 As shown, the electromagnetic instant heating cooking appliance 100 according to the first 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 a first receiving cavity 704 of the pot body 700. The IH heating module 600 is disposed, for example, at the bottom of the first receiving cavity 704. Thus, the cooking container 300 and the electromagnetic heating module 600 are detachably placed in the magnetically inductive region of the electromagnetic heating module 600. 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. The base 500 is connected to the pot body 700. The base 500 is located at the bottom of the cooking appliance 100 and is used to support the pot body 700.

[0184] The pot body 700 includes, for example, an outer shell 707, a middle plate 701, an inner cylinder 703, and a mounting bracket 610. The middle plate 701 is located inside the outer shell 707, at the top of the pot body 700, forming at least the upper surface of the pot body 700. The inner cylinder 703 is connected to the lower side of the middle plate 701 and extends in the vertical direction. The mounting bracket 610 is connected to the bottom of the inner cylinder 703.Figure 3 As shown, the mounting rack 610 is in a basin shape, including a mounting rack bottom wall 671 and mounting rack side walls 672. The mounting rack side walls 672 extend from edges of the mounting rack bottom wall 671 in an axial direction (e.g., up-down direction) of the mounting rack 610. The top of the mounting rack side walls 672 is detachably connected to the bottom of the inner cylinder 703, for example. The base 500 is connected to the outer shell 707 and / or the middle plate 701, for example.

[0185] In a broad sense, the outer shell 707 and the base 500 enclose a first accommodating cavity 704, and the middle plate 701, the inner cylinder 703 and the mounting rack 610 divide the first accommodating cavity 704, and the outer shell 707, the base 500, the middle plate 701, the inner cylinder 703 and the mounting rack 610 can all provide cavity walls of the first accommodating cavity 704. In a narrow sense, the middle plate 701, the inner cylinder 703 and the mounting rack 610 enclose a second accommodating cavity 705. The inner cylinder 703 and the mounting rack side walls 672 form part of the side walls 706 of the second accommodating cavity 705, respectively, and the mounting rack bottom wall 671 forms a bottom wall of the second accommodating cavity 705. The second accommodating cavity 705 is part of the first accommodating cavity 704. The part of the first accommodating cavity 704 other than the second accommodating cavity 705, i.e., the space between the cavity walls of the second accommodating cavity 705 and the outer shell 707, can be used to mount other components of the pot body 700, such as a fan, a circuit board, etc. The inside of the inner cylinder 703 is used to place the cooking container 300, i.e., the cooking container 300 is placed in the second accommodating cavity 705. The inner cylinder 703 is arranged around the cooking container 300. By arranging the inner cylinder 703, the heat generated by the cooking container 300 can be reflected to the cooking container 300, and the heat generated by the cooking container 300 can be prevented from leaking out, preventing the temperature of the pot body 700 from being too high, improving the heat preservation effect of the cooking container 300 and the safety of the cooking appliance 100. The mounting rack 610 and the inner cylinder 703 can also be understood as an inner shell 708 of the pot body 700. The inner shell 708 is a cavity wall of the second accommodating cavity 705. The inner shell 708 is connected to the outer shell 707 as a whole to form an integral shell.

[0186] The electromagnetic heating module 600 has an electromagnetic heating module central axis P1, and the magnetic field strength of the alternating magnetic field generated by the electromagnetic heating module 600 is non-uniformly distributed along the circumferential direction of the electromagnetic heating module. The cooking container 300 has a cooking container central axis P2. The cooking container 300 is in a shape of a solid of revolution (e.g., has a circular cross-section) with the cooking container central axis P2 as the axis. The cooking container 300 is arranged in a magnetically inductive region of the electromagnetic heating module 600, e.g., is separably arranged in the magnetically inductive region. When the cooking container 300 is placed in the second accommodating cavity 705, the cooking container central axis P2 coincides or substantially coincides with the electromagnetic heating module central axis P1. Thus, the alternating magnetic field of the electromagnetic heating module 600 is non-uniformly distributed along the circumferential direction of the cooking container 300.

[0187] The cooking appliance 100 is configured such that at least a portion of the electromagnetic heating module 600 can rotate relative to the cooking container 300, so that the alternating magnetic field of the electromagnetic heating module 600 and the cooking container 300 rotate relative to each other, thereby allowing the cooking container 300 to be heated evenly.

[0188] For example, in the illustrated embodiment, the cooking appliance 100 is configured such that at least a portion of the electromagnetic heating module 600 is rotatable relative to the cooking container 300 about the central axis P1 of the electromagnetic heating module.

[0189] Specifically, such as Figures 2 to 11 As shown, the electromagnetic heating module 600 includes, for example, a coil disk 603, at least one electromagnetic coil 606, a transmission device, and a drive device. The coil disk 603 is rotatable (also referred to as a turntable 603 in the first embodiment of this application), specifically rotatable about the central axis P1 of the electromagnetic heating module, which is, for example, also the central axis P3 of the coil disk 603. The coil disk 603 is, for example, disc-shaped, and its shape is adapted to the bottom shape of the cooking container 300. The electromagnetic coil 606 is disposed on the coil disk 603, for example, on the bottom surface of the coil disk 603, and is thus driven to rotate by the coil disk 603. When energized, the electromagnetic coil 606 generates the aforementioned alternating magnetic field, thereby inducing electromagnetic induction with the cooking container 300, heating the cooking container 300, and subsequently heating the food inside the cooking container 300. The coil disk 603 is disposed on the mounting bracket 610, for example, on the bottom wall 671 of the mounting bracket, and is rotatable relative to the mounting bracket 610 about the central axis P3 of the turntable. The mounting bracket 610 supports the various functional components within the electromagnetic heating module 600. A drive unit is mounted on the mounting bracket 610 and provides the driving force to rotate the turntable 603. A transmission device connects the coil disc 603 and the drive unit, thereby enabling the drive unit to drive the coil disc 603 to rotate via the transmission device. The axial direction of the turntable 603 is also the axial direction of the electromagnetic heating module 600. The circumferential direction of the turntable 603 is also the circumferential direction of the electromagnetic heating module 600. The radial direction of the turntable 603 is also the radial direction of the electromagnetic heating module 600. In actual use of the cooking appliance 100, the axial direction of the turntable 603 is the up-down direction.

[0190] When the mounting bracket 610 is considered as part of the electromagnetic heating module 600, the electromagnetic heating module 600 is entirely installed in the broad first receiving cavity 704. When the mounting bracket 610 is considered as the cavity wall of the narrow second receiving cavity 705, the aforementioned coil disk 603, electromagnetic coil 606, transmission device, and drive device are all located in the second receiving cavity 705, or connected to the cavity wall of the second receiving cavity 705.

[0191] The electromagnetic heating module 600 can be mounted onto the cavity wall of the first receiving cavity 704 using the mounting bracket 610. This allows the electromagnetic heating module to be pre-assembled as a whole before being installed in the first receiving cavity 704. This avoids installing individual components one by one into the first receiving cavity 704, such as installing them individually onto the base 500, thus avoiding the impact of installation accuracy issues on the components at the mounting positions. This ensures high installation accuracy between the multiple components of the electromagnetic heating module 600, facilitating assembly in the cooking appliance 100, guaranteeing the normal operation and cooking effect of the cooking appliance 100, and improving the user experience.

[0192] For example, such as Figure 6 and Figure 7 As shown, the electromagnetic coil 606 and the coil disk 603 are not concentrically arranged. "Not concentric" means that the spiral center of the coil 606's winding is not collinear with the central axis of the coil disk 603, that is, the winding center of the coil 606 deviates from the central axis P3 of the turntable. For example, the electromagnetic heating module 600 includes only one electromagnetic coil 606, and the winding center of the electromagnetic coil 606 is deviated from the central axis of the coil disk 603. Alternatively, the electromagnetic heating module 600 includes at least two electromagnetic coils 606, all of which are spaced apart along the circumferential direction of the electromagnetic heating module 600. For example, the electromagnetic heating module 600 includes N electromagnetic coils 606, all of which are equally spaced along the circumferential direction of the electromagnetic heating module, where N is a natural number greater than or equal to 2. Preferably, N is less than or equal to 6. In the illustrated embodiment, the electromagnetic heating module 600 includes three electromagnetic coils 606, all of which are equally spaced (120-degree circumferential angle) along the circumferential direction of the electromagnetic heating module.

[0193] In this paper, all electromagnetic coils 606 are equally spaced along the circumferential direction of the electromagnetic heating module. This can be understood as the center point of each electromagnetic coil 606 being on the same circle with a point on axis P1 as the center, and the center points of all electromagnetic coils 606 being equally spaced on this circle. The coil disk 603 and all electromagnetic coils 606 form a rotationally symmetrical structure with axis P1 as the rotational symmetry center and 360 / N degrees as the rotation angle.

[0194] The number of electromagnetic coils 606 is determined according to the required electromagnetic heating power. Multiple electromagnetic coils 606 can be connected in series, for example, they can be made by winding a single enameled wire.

[0195] At the part with the coil 606, the magnetic field strength is strong, and the heating effect is obvious; at the part between the two coils 606, the magnetic field strength is weak, and the heating effect is not obvious. The rotation of the turntable 603 around the turntable center axis P3 relative to the mounting frame 610 causes the alternating magnetic field of the coil 606 to rotate around the turntable center axis P3 relative to the mounting frame 610. By arranging the non-concentric coils, the multi-point heat source rotation heating effect of the cooking utensil 100 can be achieved, so that the heating convection pattern is variable, and the complex and variable convection tumbling pattern and tumbling effect inside the cooking container 300 can be achieved, so that the food is heated more uniformly, and the adverse phenomenon of partial rice being overcooked or dry after cooking is improved.

[0196] As shown in Figure 3 , the axial section of the turntable 603 includes a C-shaped structure, and the cooking container 300 is located inside the C-shaped structure, so that the turntable 603 conforms to the shape of the bottom of the cooking container 300, reduces the distance between the alternating magnetic field and the cooking container 300, and can make the alternating magnetic field act on the cooking container 300 better, thereby improving the heating efficiency. The coil 606 is arranged on the side of the turntable 603 facing the mounting frame 610 to avoid being exposed in the accommodating cavity 705. The coil 606 is located outside the C-shaped structure.

[0197] Optionally, as shown in Figure 8 , the coil disc 603 is provided with a positioning groove 632 protruding towards the cooking container 300 of the cooking utensil 100, and the electromagnetic coil 606 is arranged on the bottom surface of the coil disc 603 and located in the positioning groove 632. The top of the positioning groove 632 protrudes from the inner surface of the coil disc 603 to form a boss structure. By arranging the positioning groove 632 on the coil disc 603, the positioning of the electromagnetic coil 606 is facilitated, and the electromagnetic coil 606 can be prevented from moving position on the bottom surface of the coil disc 603, thereby improving the stability of the electromagnetic coil 606.

[0198] Optionally, as shown in Figure 3 and Figure 8 , the electromagnetic heating module 600 further comprises a bobbin 607, and the bobbin 607 is arranged in the positioning groove 632. The bobbin 607 is arranged correspondingly with the electromagnetic coil 606, and the electromagnetic coil 606 is arranged in the bobbin 607, that is, is coiled on the bobbin 607. The bobbin 607 is constructed as a sandwich structure, for example, and a winding column is arranged at the center of the sandwich, and the enameled wire of the coil 606 is coiled in a disc shape in the sandwich around the winding column. The bobbin 607 and the coil disc 603 can be connected by screws to be fixed in the positioning groove 632. By arranging the electromagnetic coil 606 in the coiled state in the bobbin 607, the assembly of the electromagnetic coil 606 on the coil disc 603 is facilitated, and the electromagnetic coil 606 can also be effectively prevented from being scattered, thereby improving the stability of the electromagnetic coil 606 itself.

[0199] Optionally, as shown in Figure 3 ,Figure 7 and Figure 8 As shown, the electromagnetic heating module 600 also includes at least one magnetic guide element 608. The magnetic guide element 608 is disposed, for example, on the bottom surface of the winding frame 607 and corresponding to the electromagnetic coil 606, and can guide the electromagnetic field generated when the electromagnetic coil 606 is energized to converge towards the cooking container 300. The magnetic guide strip and the winding frame 607 can be fixed by snap-fit. In the illustrated embodiment, multiple magnetic guide elements 608 are provided corresponding to each electromagnetic coil 606. The magnetic guide element 608 is, for example, constructed as a long strip of magnetic guide strip, with multiple magnetic guide strips evenly spaced along the circumferential direction of the coil 606, forming a radial star shape. The magnetic guide element 608 can also be configured as a ring-shaped magnetic guide strip. By providing magnetic guide elements 608 corresponding to the electromagnetic coil 606, the magnetic field generated by the energized electromagnetic coil 606 can be guided to act on the cooking container 300 of the cooking appliance 100, improving heating efficiency.

[0200] Optionally, such as Figures 2 to 10 As shown, the driving device of the electromagnetic heating module 600 includes a motor 613. The motor 613 can be a stepper motor, used to provide the driving force to rotate the coil disk 603. Through stepper motor rotation control and transmission device, the coil disk 603 can achieve forward and reverse rotation, intermittent rotation, and stepless speed regulation. The motor 613 is mounted on the mounting bracket 10, for example, by screws 618 (see...). Figure 9 Preferably, the electromagnetic heating module 600 further includes a magnetic shield 612, which covers the motor 613 to isolate electromagnetic interference between the motor 613 and the electromagnetic coil 606. The magnetic shield 612 can be made of materials with magnetic shielding function, such as aluminum or copper.

[0201] Optionally, such as 3 and Figures 6 to 8 As shown, the transmission device of the electromagnetic heating module 600 includes a first gear 609 and a second gear 611. The first gear 609 is coaxially connected to the cylindrical part of the coil disk 603. The second gear 611 is connected to the output shaft of the motor 613 and meshes with the first gear 609 for transmission. The first gear 609 and / or the second gear 611 can be hollowed out, i.e., have weight-reducing holes, which can reduce the weight of the product. By using a gear pair, it is easy to set 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.

[0202] Preferably, the first gear 609 and the second gear 611 are non-metallic gears. Specifically, they can be made of plastic materials, such as POM, GFPP, PBT, PA66, etc. In this embodiment, POM is preferred. Since the gear pair is close to the coil, setting the gear pair as non-metallic gears can avoid electromagnetic induction with the coil.

[0203] Optionally, the gear ratio of the second gear 611 to the first gear 609 is any one of 1:1, 1:2, 1:3 and 1:4. Considering the product space layout, the gear ratio is preferably designed to be 1:3, which facilitates the speed regulation of the stepper motor and the control of the rotation angle. For example, the transmission result makes the rotation speed of the coil disc 603 range from 0.1 r / min to 10 r / min. Preferably, the rotation speed is 1 r / min.

[0204] Optionally, as shown in Figure 3 、 Figure 8 and Figure 11 , the substantially central part of the turntable 603 is provided with a turntable cylindrical part 635 protruding towards the mounting frame bottom wall 671 in the axial direction of the turntable 603, and the mounting frame bottom wall 671 is provided with a mounting frame cylindrical part 645 protruding towards the turntable 603 in the axial direction of the turntable 603. The cooking utensil 100 is configured such that the turntable cylindrical part 635 and the mounting frame cylindrical part 645 are adapted and rotationally connected, so that the turntable cylindrical part 635 is rotatable relative to the mounting frame cylindrical part 645 about the turntable center axis P3. Thus, the turntable 603 is rotatable relative to the mounting frame 610 about the turntable center axis P3.

[0205] Specifically, the cooking utensil 100 is configured such that one of the mounting frame cylindrical part 645 and the turntable cylindrical part 635 is at least partially located in the other of the mounting frame cylindrical part 645 and the turntable cylindrical part 635, and the turntable cylindrical part 635 and the mounting frame cylindrical part 645 are connected through a revolute pair structure 604, wherein the axis of the revolute pair structure 604 coincides with the turntable center axis P3. The revolute pair structure 604 is, for example, a bearing. The turntable cylindrical part 635 and the mounting frame cylindrical part 645 are, for example, cylinders, the two cylinders are nested, the axial directions of the two cylinders are both the axial direction of the turntable 603, and the bearing is located between the two cylinders and tightly fits with the two cylinders, respectively. By providing the revolute pair structure 604 in the middle of the mounting frame 610 to support the rotation of the coil disc 603, the stability of the rotation of the coil disc 603 is improved, and eccentric rotation is avoided, which affects the cooperation between mechanisms.

[0206] The revolute pair structure 604 can be configured as a rolling revolute pair structure or a sliding revolute pair structure. Optionally, the revolute pair structure 604 is made of a non-metallic material, for example, the bearing is a non-metallic bearing, which can be made of plastic material, ceramic material or other non-metallic bearings. Since the revolute pair structure 604 is close to the coil, by setting the revolute pair structure 604 as a non-metallic component, electromagnetic induction with the coil 606 can be avoided.

[0207] In the illustrated embodiment, the rotary disc cylindrical portion 635 is outside and the mounting frame cylindrical portion 645 is inside. Of course, it can also be that the rotary disc cylindrical portion 635 is inside and the mounting frame cylindrical portion 645 is outside. The first gear 609 can be sleeved on the outer peripheral surface of the rotary disc cylindrical portion 635 of the coil disc 603, for example, and the two are connected by key transmission. Alternatively, the coil disc 603 can be integrally injection molded with the first gear 609.

[0208] Preferably, as shown in Figure 3 the outer peripheral surface of the one inside of the mounting frame cylindrical portion 645 and the rotary disc cylindrical portion 635 is provided with a first surface 641 extending in the radial direction, and the inner peripheral surface of the other of the mounting frame cylindrical portion 645 and the rotary disc cylindrical portion 635 is provided with a second surface 642 extending in the radial direction. The first surface 641 and the second surface 642 are spaced apart in the axial direction of the rotary disc 603. The revolute pair structure 604 is located between the first surface 641 and the second surface 642, so that the revolute pair structure 604 is limited in the axial direction.

[0209] Optionally, as shown in Figure 3 , Figure 4 , Figure 8 and Figure 9 , the electromagnetic heating module 600 further comprises a temperature sensor 605. The top of the temperature sensor 605 passes through the coil disc 603 to elastically contact the cooking container 300 of the cooking utensil 100. The temperature sensor 605 is arranged in the rotary disc cylindrical portion 635. The temperature sensor 605 can adopt an NTC type temperature sensor. The electromagnetic heating module 600 further comprises a spring 631. The inner peripheral surface of the mounting frame cylindrical portion 645 is provided with a third surface 643 extending in the radial direction, and the spring 631 is located between the temperature sensor 605 and the third surface 643. For example, the temperature sensor 605 is provided below the spring 631, the lower end of the spring 631 is supported on the mounting frame 610, and the upper end of the spring 631 pushes the temperature sensor 605, so that the temperature sensor 605 can elastically contact the cooking container 300, ensuring the temperature measurement effect. The third surface 643 of the mounting frame 610 is connected with a wire passing hole 644, that is, the third surface 643 and the inner peripheral surface of the wire passing hole 644 are both part of a continuous surface of the mounting frame 610, wherein the wire passing hole 644 is used for passing the cable 626 of the temperature sensor 605.

[0210] The interiors of the rotary disc cylindrical portion 635 and the mounting frame cylindrical portion 645 are both hollow, just for mounting the temperature sensor 605. The temperature sensor 605 does not rotate with the rotary disc 603.

[0211] Optionally, as shown in Figure 3 , Figure 8 and Figure 9As shown, the electromagnetic heating module 600 further comprises a blocking structure 602. The blocking structure 602 comprises a blocking portion 651 and a connecting portion 652, for example. The blocking portion 651 is configured as a blocking ring in the radial direction of the rotating disc 603. The connecting portion 652 extends substantially perpendicularly to the blocking portion 651. One end of the connecting portion 652 is connected to the blocking portion 651, and the other end is used to connect to the mounting frame 610, such as the mounting frame cylindrical portion 645. The connecting portion 652 extends in the axial direction of the rotating disc 603, and is configured as a sleeve (also referred to as a blocking structure cylindrical portion), for example. The connecting portion 652 is located in the rotating disc cylindrical portion 635 and is connected to the mounting frame 610 (such as a clamping connection or a threaded connection). The blocking structure 602 is fixedly connected to the mounting frame 610, so as not to rotate with the rotating disc 603.

[0212] One end of the connecting portion 652 is connected to the middle of the radial width of the blocking ring of the blocking portion 651 (not necessarily the midpoint of the width of the blocking ring). The outer diameter of the blocking ring of the blocking portion 651 is greater than the inner diameter of the rotating disc cylindrical portion 635. The inner diameter of the blocking ring of the blocking portion 651 is less than the maximum outer diameter of the temperature sensor 605. The part of the blocking ring located radially outward of the connecting portion 652 is used to cover the port of the rotating disc cylindrical portion 635, that is, to extend outward from the edge of the rotating disc cylindrical portion 635 in the radial direction of the rotating disc 603, so as to block the movement of the rotating disc 603 in the axial direction of the rotating disc 603 away from the mounting frame 610. The part of the blocking ring located radially inward of the connecting portion 652 is used to limit the temperature sensor 605. The through hole in the middle of the blocking ring is used to expose the temperature sensor 605, and the temperature sensor 605 can extend out of the through hole under the action of the spring 631.

[0213] Optionally, as shown in Figure 3 , Figure 8 , Figure 9 and Figure 12 , the electromagnetic heating module 600 further comprises a retaining ring 601. The retaining ring 601 comprises a ring wall 647 and a ring retaining rib 627, for example. The ring wall 647 extends in the axial direction of the rotating disc 603 and is located at the outer periphery of the rotating disc 603. The ring wall 647 is connected to the mounting frame 610. The ring retaining rib 627 extends along the inner circumferential surface of the ring wall 647. The ring retaining rib 627 is located on the side of the rotating disc 603 facing away from the mounting frame 610. In the projection of the electromagnetic heating module 600 in the axial direction of the rotating disc 603, the ring retaining rib 627 coincides with the outer peripheral edge of the rotating disc 603 along the circumferential direction of the rotating disc 603. The mounting frame 610 integrally wraps the rotating disc 603 from below, and the retaining ring 601 is arranged on the top of the mounting frame 610. The ring retaining rib 627 can block the gap around the rotating disc 603, which is not only aesthetically pleasing, but also prevents foreign matter from entering the inside of the electromagnetic heating module 600 and affecting the rotation of the rotating disc 603.

[0214] At least one of the mounting frame 610 and the retaining ring 601 is directly detachably connected to the cavity wall of the first accommodating cavity 704, for example, the inner cylinder 703 or the base 500. For example, the retaining ring 601 can be detachably connected to the inner cylinder 703 of the pot body 700. As shown in Figure 2 The middle plate 701 is provided with a plurality of connecting columns 702 extending towards the mounting frame 610 on the outer side of the inner cylinder 703. The outer side of the annular wall 647 of the retaining ring 601 is correspondingly provided with a first connecting hole 628, and the connecting column 702 is connected with the first connecting hole 628 by a screw, that is, the connection of the retaining ring 601 and the middle plate 701 can be realized. The outer side of the annular wall 647 of the retaining ring 601 is further provided with a second connecting hole 629, and the edge of the mounting frame 610 is correspondingly provided with a connecting lug 626. Through the screw 619 (see Figure 5 and Figure 9 ), the detachable connection of the retaining ring 601 and the mounting frame 610 can be realized, and the detachable connection of the electromagnetic heating module 600 and the middle plate 701 is realized. The retaining ring 601 is detachably connected to the cavity wall of the first accommodating cavity 704, and the mounting frame 610 is indirectly detachably connected to the cavity wall of the first accommodating cavity 704 through the detachable connection with the retaining ring 601. Of course, the mounting frame 610 can be directly detachably connected to the cavity wall of the first accommodating cavity 704.

[0215] As described above, the bearing is arranged at the center of the coil disc 603, and the support and rotation of the coil disc 603 are realized through the bearing. However, the coil disc 603 is only supported by the bearing at the center, and affected by the machining precision and the installation precision, the coil disc 603 will have a rotation eccentricity, which will cause noise or jamming during rotation. In addition, when cooking and heating, the temperature of the coil disc 603 can reach about 100℃, and the coil disc 603 will be deformed by heat, which will also cause the coil disc 603 to have a rotation eccentricity, which may cause the IH cooking appliance to work abnormally, and the cooking function cannot be completed or the cooking effect is poor.

[0216] Therefore, optionally, as shown in Figure 13As shown, the position correction mechanism 630 is arranged between the rotating disc 603 and the housing 708 (the cavity wall of the second accommodating cavity 705) to limit the position of the rotating disc 603 relative to the housing 708, i.e. to correct the eccentricity of the rotating disc 603. The position correction mechanism 630 can be at least one roller mechanism arranged on either the edge portion of the rotating disc 603 or the housing 708. Preferably, a plurality of roller mechanisms 630 are arranged, i.e. at least two. All the roller mechanisms 630 are arranged at intervals along the circumferential direction of the rotating disc 603. The roller mechanisms 630 are used to contact the edge portion of the rotating disc 603 or the housing 708 in the radial direction and / or the axial direction of the rotating disc 603. The roller mechanisms 630, for example, include rollers 638 and shafts 636 of the rollers 638. The rollers 638 are used to contact the edge portion of the rotating disc 603 or the housing 708 in the radial direction and / or the axial direction of the rotating disc 603.

[0217] Specifically, one of the edge portion of the rotating disc 603 and the cavity wall of the second accommodating cavity 705 is provided with a plurality of roller mechanisms 630 arranged at intervals along the circumferential direction of the rotating disc 603, and the roller mechanisms 630 are used to contact the other of the edge portion of the rotating disc 603 and the cavity wall of the second accommodating cavity 705 in the radial direction and / or the axial direction of the rotating disc 603. In the illustrated embodiment, one of the edge portion of the rotating disc 603 and the side wall 706 of the second accommodating cavity 705 is provided with a plurality of roller mechanisms 630 arranged at intervals along the circumferential direction of the rotating disc 603, and the roller mechanisms 630 are used to contact the other of the edge portion of the rotating disc 603 and the side wall 706 of the second accommodating cavity 705 in the radial direction and / or the axial direction of the rotating disc 603. Due to machining errors, installation errors, thermal deformation, etc., the rotating disc 603 can be eccentric when rotating, so that the rotating disc 603 cannot stably rotate around a fixed axis. At this time, the rollers 638 contact the corresponding structures (hereinafter referred to as contact structures) in the radial direction and / or the axial direction of the rotating disc 603, which can limit the degree of eccentricity in the radial direction and / or the axial direction of the rotating disc 603 and improve the stability of the rotation of the rotating disc 603. At the same time, the rollers 638 can rotate, and the friction when the rollers 638 contact the corresponding contact structures is small, which basically does not affect the rotation of the rotating disc 603.

[0218] The rollers 638 are preferably made of a material with high hardness (good rigidity), wear resistance and strength, so as to reduce the contact friction and ensure the service life.

[0219] It can be understood that the rollers 638 are used to correct the position of the turntable 603 when the turntable 603 is eccentric, and thus the rollers 638 are not necessarily always in contact with the turntable 603 or the shell 708, but are in contact or to be in contact with the turntable 603 or the shell 708. Therefore, a certain gap is reserved between the turntable 603 and the contact structure to accommodate the thermal deformation of the turntable 603 or the unevenness of the processing. Alternatively, the maximum gap between the outer surface of the roller 638 and the contact structure is 0.3-5mm. In other words, the roller mechanism 630 and the corresponding contact structure limit the eccentricity of the turntable 603 to 0.6-10mm.

[0220] Preferably, at least three spaced-apart roller mechanisms 630 are arranged along the circumferential direction of the turntable 603. For example, three to six spaced-apart roller mechanisms 630 are arranged along the circumferential direction of the turntable 603. The plurality of roller mechanisms 630 are, for example, equidistantly distributed.

[0221] In the illustrated embodiment, one of the edge portion of the turntable 603 and the side wall 706 of the second accommodating cavity 705 is provided with a plurality of roller mechanisms 630 arranged along the circumferential direction of the turntable 603, the axial direction of the roller 638 is the same as the axial direction of the turntable 603, and the other of the edge portion of the turntable 603 and the side wall 706 of the second accommodating cavity 705 is provided with a groove 633 extending along the circumferential direction of the turntable 603, the slot and the groove bottom of the groove 633 are arranged along the radial direction of the turntable 603, and the groove 633 is used to accommodate the roller 638. Thus, the groove 633 is the corresponding contact structure, and the cooperation of the groove 633 and the roller 638 can at least limit the eccentricity of the turntable 603 in the radial direction. As shown, the maximum distance a between the outer surface of the roller 638 at the maximum radial dimension and the groove bottom of the groove 633 along the radial direction of the turntable 603 is 0.3-5mm.

[0222] Specifically, the sidewall 706 of the second receiving cavity 705 is provided with a roller mechanism 630, and the edge portion of the turntable 603 is provided with a groove 633. The annular wall 647 of the retaining ring 601 provides a portion of the sidewall 706 of the second receiving cavity (also referred to as the first sidewall). The mounting bracket sidewall 672 provides another portion of the sidewall 706 of the second receiving cavity 705 (also referred to as the second sidewall). The first and second sidewalls are arranged along the axial direction of the turntable 603 (i.e., the axial direction of the second receiving cavity 705). One end of the shaft 636 of the roller 638 is connected to the first sidewall, and the other end is connected to the second sidewall. As mentioned above, the first sidewall and the second sidewall are detachably connected, so that the roller 638 can be installed while connecting the first sidewall and the second sidewall. For example, the first sidewall is provided with a mounting groove 673 for receiving one end of the shaft 636. The second sidewall is provided with a mounting through hole 674 for receiving the other end of the shaft 636. After connecting the turntable 603 to the mounting bracket 610, first roughly align the roller 638 with the groove 633 so that the rotating shaft 636 is installed into the mounting through hole 674. Then, when the mounting bracket 610 is connected to the retaining ring 601, the alignment design of the installation position allows the rotating shaft 636 to enter the mounting groove 673.

[0223] Understandably, the groove 633 also has an axial limiting effect on the roller mechanism 630, which can also limit the axial eccentricity of the turntable 603.

[0224] Alternatively, the roller mechanism 630 can be set on the turntable 603, and the corresponding groove 633 can be set on the side wall 706 of the second receiving cavity.

[0225] In an embodiment not shown in this application, a plurality of roller mechanisms 630 are provided on the edge portion of the turntable 603 and one of the sidewalls 706 of the second receiving cavity 705, arranged at circumferential intervals along the turntable 603. The axial direction of the rollers 638 is perpendicular to the axial direction of the turntable 603 (relative to the axial direction of the turntable 603). Figure 13 (The state shown is rotated 90 degrees in the plane of the paper). The edge portion of the turntable 603 and another portion of the second receiving cavity sidewall 706 are provided with an annular contact surface extending in the circumferential direction of the turntable 603. This annular contact surface is used to contact the outer peripheral surface of the roller 638. It is understood that the radial direction of this annular contact surface is the radial direction of the turntable 603. This annular contact surface is aligned with the roller mechanism 630 in the axial direction of the turntable 603, for example, located above or below the roller mechanism 630. This implementation can limit the axial eccentricity of the turntable 603. For example, multiple roller mechanisms 630 are provided in the second receiving cavity sidewall 706, and the rollers 638 are used to contact the upper or lower surface of the turntable 603. In other words, the surface of the turntable 603 itself includes an annular contact surface for contacting the rollers.

[0226] Preferably, the maximum distance between the outer surface of the roller 638 at the maximum radial dimension and the annular contact surface in the axial direction of the rotary disc 603 is 0.3-5mm.

[0227] In such an embodiment, the annular contact surface can include a first annular contact surface and a second annular contact surface oppositely arranged in the axial direction of the rotary disc 603. The plurality of roller mechanisms 630 can be staggered in the axial direction of the rotary disc 603, i.e. installed at different heights. Among them, part of the rollers 638 are used to contact the first annular contact surface (e.g. the upper surface of the rotary disc 603), and the other part of the rollers 638 are used to contact the second annular contact surface (e.g. the lower surface of the rotary disc 603). Alternatively, the plurality of rollers 638 are arranged in pairs, and the two rollers 638 in each pair are spaced apart in the axial direction of the rotary disc 603, and the first annular contact surface and the second annular contact surface are located between the two rollers 638 in each pair. In this way, the eccentricity of the rotary disc 603 in the opposite two directions of the axial direction can be limited (e.g. the rotary disc 603 is clamped between the upper and lower rollers).

[0228] Of course, the roller mechanism 630 can also be arranged on the rotary disc 603, and the corresponding annular contact surface can be arranged on the second accommodating cavity side wall 706. For example, the second accommodating cavity side wall 706 can provide the annular contact surface by arranging an annular rib or a stepped surface on the inner circumferential surface.

[0229] Optionally, as shown in Figures 1 to 8 The cooking utensil 100 further includes a control device 400. The control device 400 is used to control the operation of all electrically controlled components of the cooking utensil 100. The control device 400 can be arranged on any one of the mounting frame 610, the middle plate 701 and the base 500. Preferably, the control device 400 is arranged on the mounting frame 610 and electrically connected to the electromagnet coil 606, the motor 613 and the temperature sensor 605 through cables respectively. As shown in Figure 2 One side of the control device 400 is provided with a third connecting hole 401, which can be connected to the mounting frame 610 through screws. By connecting the control device 400 to the mounting frame 610, the control device 400 and the mounting frame 610 can be assembled together, thereby being pre-connected to the electromagnetic heating module 600, so that the installation of the electromagnetic heating module 600 in the first accommodating cavity 704 is easier.

[0230] Preferably, the mounting bracket 610 is provided with openings for the cables or connecting cables of the electrical components of the electromagnetic heating module 600 to pass through, so that these cables are connected to the control device 400 on the side of the mounting bracket 610 facing away from the turntable 603 for assembly operations. In this application, each cable and its connecting cable of the electrical components of the electromagnetic heating module 600 is referred to as a functional module wiring. Further, a wire groove is provided on the side of the mounting bracket 610 facing away from the turntable 603 to accommodate these functional module wirings. A wire clip may also be provided on the side of the mounting bracket 610 facing away from the turntable for limiting the movement of these functional module wirings.

[0231] like Figure 5 and Figure 10 As shown, the main functional module wiring of the electromagnetic heating module 600 includes a first main cable 614 and a second main cable 615. The first main cable 614 is connected at both ends to one end of the enameled wire forming the electromagnetic coil 606 and the control device 400, respectively. The second main cable 615 is connected at both ends to the other end of the enameled wire forming the electromagnetic coil 606 and the control device 400, respectively. Because the first main cable 614 and the second main cable 615 need to rotate with the coil disc 603, both are provided with U-shaped bends to allow for deformation and prevent tangling when rotating with the coil disc 603. The bottom of the mounting bracket 610 is provided with a first slot 621 and a second slot 622. The first slot 621 is used to limit the first main cable 614, and the second slot 622 is used to limit the second main cable 615. The bottom of the mounting bracket 610 is also provided with a wire clip 620 for limiting the first main cable 614 and the second main cable 615. Figure 9 As shown, the terminal at one end of the enameled wire connecting the first main cable 614 and the second main cable 615 can be fixed to the mounting bracket 610 by screws 617, and the terminal at one end connecting the control device 400 can be fixed to the circuit board by screws 616.

[0232] The main functional module wiring of the electromagnetic heating module 600 also includes a motor cable 625 and a temperature sensor cable 626. One end of the motor cable 625 connects to the motor 613, and the other end connects to the control device 400. One end of the temperature sensor cable 626 connects to the temperature sensor 605, and the other end connects to the control device 400. Multiple cable clips 624 are provided on the side of the mounting bracket 610 to limit the movement of the motor cable 625 and the temperature sensor cable 626. Cable clips 623 are also provided at the bottom of the mounting bracket 610 to limit the movement of the motor cable 625.

[0233] The electromagnetic heating module 600 is configured such that the alternating magnetic field has N strong magnetic zones and N weak magnetic zones alternately distributed along the circumferential direction of the electromagnetic heating module 600, wherein the magnetic field strength of the strong magnetic zones is greater than that of the weak magnetic zones. Preferably, the N strong magnetic zones are equally spaced along the circumferential direction of the electromagnetic heating module 600, and the N weak magnetic zones are equally spaced along the circumferential direction of the electromagnetic heating module 600. Considering the limited length of the connecting cable of the enameled wire of the coil 606, the angle range of the rotation of the turntable 603 is, for example, 360 / N degrees (±180 / N degrees), so that the heating positions can not be missed, and the cooking container 300 can be heated comprehensively and uniformly. In the illustrated embodiment, N = 3.

[0234] As shown in Figure 11 and Figures 14 to 16 , the electromagnetic heating module 600 further comprises a position detection assembly 664 for detecting the rotation position of the coil disc 603, i.e., the rotation position of the coil 606. For example, the position detection assembly 664 is arranged on the mounting frame 610 and electrically connected to the control device 400. For example, the position detection assembly 664 is electrically connected to the control device 400 through a cable 667. The coil disc 603 is provided with a triggering device (a first triggering device 665 and a second triggering device 666). The triggering device of the coil disc 603 can trigger the position detection assembly 664 during the rotation of the coil disc 603, so that the control device 400 can know the rotation position of the coil disc 603. For example, the position detection assembly 664 comprises an optical coupling sensor, and the triggering device can trigger by blocking the light emitted by the optical coupling sensor. Figure 15 and Figure 16 , the positions of the coil disc 603 before and after rotation relative to Figure 14 are shown. The control device 400 can take the rotation position of the coil disc 603 when the triggering device triggers the position detection assembly 664 as the reference position, and in combination with the output angle of the stepping motor 613, the rotation angle of the coil disc 603 can be known. When the circumferential interval angle between the first triggering device 665 and the second triggering device 666 is 360 / N degrees, the turntable 603 can be controlled to rotate reciprocally between the two triggering positions (the positions shown in Figure 15 and Figure 16 ).

[0235] The following describes other embodiments of the present application. The same design in each embodiment will not be described again, and only the differences between the embodiments will be highlighted.

[0236] First, in the second embodiment, the forming method of the magnetic field non-uniformly distributed along the circumferential direction of the electromagnetic heating module 600A is different. As shown in Figure 17 and Figure 18As shown, the electromagnetic heating module 600A generates an alternating magnetic field by using a coil 606 coaxial with the electromagnetic heating module, and uses a magnetic shielding disc provided with magnetic permeable holes in the circumferential direction to make the alternating magnetic field non-uniform, where the magnetic field strength is large at the magnetic permeable holes and small at the magnetic shielding holes. The electromagnetic heating module 600A is configured to rotate the magnetic shielding disc, thereby realizing rotation of the magnetic field relative to the cooking container 300.

[0237] For example, the coil 606 is concentrically arranged on the disc bobbin 680, and the winding center of the coil 606 and the central axis P4 of the disc bobbin 680 are both the central axis P1 of the electromagnetic heating module. The coil 606 is arranged on the lower surface of the disc bobbin 680, for example. The electromagnetic heating module 600A further comprises a rotating disc 690. The rotating disc 690 is coaxial with the disc bobbin 680. The rotating disc 690 is located between the disc bobbin 680 and the cooking container 300. The rotating disc 690 comprises a disc body 693 rotatable about a rotating disc central axis P3 in the second accommodating cavity 705. For example, the disc body 693 is connected to the mounting frame 610 and rotatable about the central axis P3 of the rotating disc 690 relative to the mounting frame 610. The rotating disc 690 is alternately divided into N first regions 691 and N second regions 692 (N is a positive integer) in the circumferential direction. The medium at the first regions 691 is different from the medium of the disc body 693, so that the magnetic field strength of the alternating magnetic field of the coil 606 at the first regions 691 is different from that at the second regions 692.

[0238] For example, the rotating disc 690, i.e. the disc body 693, is made of a first material, for example a metal with a magnetic permeability less than or equal to 10 B / H. Therefore, the rotating disc 690 forms a magnetic shielding disc that hardly allows magnetic lines to pass through. The first regions 691 are configured to have openings with certain areas, which allow magnetic lines to pass through, i.e. magnetic permeable holes. The material at the second regions 692 is the material of the disc body 693. Therefore, the magnetic lines of the alternating magnetic field at the first regions 691 are more than those at the second regions 692, so that the magnetic field strength at the first regions 691 is greater than that at the second regions 692, the first regions 691 form strong magnetic regions, and the second regions 692 form weak magnetic regions. The cooking appliance 100 is configured such that the rotating disc 690 is rotatable about the axis P1, thereby rotating the alternating magnetic field about the cooking container 300.

[0239] The medium at the first regions 691 is air, which is different from the material of the disc body 693. Alternatively, it can also be understood that there is no medium at the first regions 691, and the medium with medium is also different from the medium without medium.

[0240] In the second embodiment, a disc line holder 680 is added to the shafting, and the rotating disc 690 and the mounting frame 610 are located on the two axial sides of the disc line holder 680, respectively. The disc line holder 680 is connected to the mounting frame 610 to keep the relative position unchanged. To achieve this effect, the mounting frame cylindrical portion 645 is designed in the form of a multi-layer sleeve, for example, including the mounting frame first cylindrical portion 661, the mounting frame second cylindrical portion 662 and the mounting frame third cylindrical portion 663 from outside to inside along the radial direction. The three cylindrical portions extend from the same plane in the same direction. The rotating disc cylindrical portion 635 is located between the mounting frame third cylindrical portion 663 and the mounting frame second cylindrical portion 662, and the rotating pair structure 604 is connected between the mounting frame second cylindrical portion 662 and the rotating disc cylindrical portion 635. That is, the rotating disc cylindrical portion 635 is located in the mounting frame second cylindrical portion 662.

[0241] The connecting portion 652 of the blocking structure 602 is connected with the mounting frame third cylindrical portion 663.

[0242] The substantially central part of the disc line holder 680 is provided with a disc line holder cylindrical portion 685, which extends towards the mounting frame 610 along the axial direction of the rotating disc 690. The disc line holder cylindrical portion 685 is located on the outer periphery of the rotating disc cylindrical portion 635. The disc line holder cylindrical portion 685 is connected (for example, clamped, screwed, etc.) with the mounting frame third cylindrical portion 663.

[0243] The first gear 609 is sleeved on the outer periphery of the rotating disc cylindrical portion 635. At the same time, the mounting frame third cylindrical portion 663 and the disc line holder cylindrical portion 685 are also located on the outer periphery of the rotating disc cylindrical portion 635. In order to make the first gear 609 contact and engage with the second gear 611, the mounting frame third cylindrical portion 663 is provided with a mounting frame notch 658, and the disc line holder cylindrical portion 685 is provided with a disc line holder notch 688, so that the first gear 609 is exposed from the two notches. Compared with the first embodiment, the diameter of the first gear 609 is significantly smaller.

[0244] In Figure 19 In the third embodiment shown, the electromagnetic heating module 600B generates an alternating magnetic field by using a coil 606 coaxial with itself, and uses a circumferentially non-uniformly distributed magnetic conductive medium to make the alternating magnetic field non-uniform, where the magnetic field strength is large at the medium with high magnetic conductivity, and the magnetic field strength is small at the medium with low magnetic conductivity. The electromagnetic heating module 600A is configured to rotate the magnetic conductive medium, so as to realize the rotation of the magnetic field relative to the cooking container 300.

[0245] The first region 691 comprises a material different from the body 693 of the rotating disc 690, and the second region 692 is entirely of the material of the body 693 of the rotating disc 690, so that the magnetic field strength of the alternating magnetic field generated by the coil 606 at the first region 691 is different from the magnetic field strength at the second region 692, thereby forming an alternating magnetic field that is non-uniformly distributed along the circumferential direction of the electromagnetic heating module 600. For example, the first region 691 is provided with a magnetic line of force converging member 695, and the material of the magnetic line of force converging member 695 is, for example, a metal with a magnetic permeability greater than or equal to 100 B / H. The material of the body of the rotating disc 690 is, for example, a non-magnetic material or a metal with a magnetic permeability less than or equal to 10 B / H. Since the magnetic permeability of the second material is greater than that of the first material, the magnetic lines of force of the alternating magnetic field are focused (converged) at the magnetic line of force converging member 695, so that the magnetic field strength at the first region 691 is greater than that at the second region 692, and a strong magnetic region is formed at the first region 691, and a weak magnetic region is formed at the second region 692.

[0246] The second region 692 can be provided with a heat dissipation hole 696.

[0247] In the third embodiment, the cooking utensil 100 is configured such that the rotating disc 690 is rotatable about the axis P1, so that the cooking container 300 and the coil holder 680 do not rotate, and the magnetic field rotates, and the cooking container 300 does not rotate.

[0248] In the third embodiment, the cooking utensil 100 is configured such that the rotating disc 690 is rotatable about the axis P1, so that the cooking container 300 and the coil holder 680 do not rotate, and the magnetic field rotates, and the cooking container 300 does not rotate. Figure 20 Figure 21 In the fourth embodiment shown in FIGS. 6C and 6D, compared with the third embodiment, the rotating disc 690 of the electromagnetic heating module 600C is exchanged with the coil holder 680 in the up-down direction, and the rotating disc 690 is located between the coil holder 680 and the mounting frame 610. The connection mode of the rotating disc 690 and the mounting frame 610 is closer to the connection mode of the rotating disc 603 and the mounting frame 610 in the first embodiment. The coil holder barrel-shaped portion 685 of the coil holder 680 is located in the rotating disc barrel-shaped portion 635 and is connected with the mounting frame barrel-shaped portion 645. The central portion of the coil holder 680 (including the coil holder barrel-shaped portion 685) can be configured to form the blocking structure 602, that is, the coil holder 680 comprises the blocking structure 602. Specifically, the coil holder barrel-shaped portion 685 is a blocking structure barrel-shaped portion, and the disc surface of the coil holder 680 forms a blocking ring of a large blocking portion of the blocking structure 602.

[0249] In the fourth embodiment, the cooking utensil 100 is configured such that the rotating disc 690 is rotatable about the axis P1, so that the cooking container 300 and the coil holder 680 do not rotate, and the magnetic field rotates, and the cooking container 300 does not rotate.

[0250] ​In the second, third and fourth embodiments, the shaft cross-section of the disc holder 680 and the disc body 693 is configured as a substantially parallel C-shaped structure to conform to the bottom shape of the cooking container 300. The coil 606 is arranged on the side of the disc holder 680 facing the mounting bracket 610, i.e. the outer side of the C-shaped structure, which facilitates the wiring of the coil 606 and the connection with the control device 400.

[0251] In the second, third and fourth embodiments, a position correction mechanism 630 can be arranged between the rotating disc 690 and the housing 708 (e.g. the inner cylinder 703) to prevent the rotating disc 690 from being severely decentered, similar to the first embodiment.

[0252] In summary, the electromagnetic heating module 600 is configured 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 are equally spaced along the circumferential direction of the electromagnetic heating module 600, and the N weak magnetic regions are equally spaced along the circumferential direction of the electromagnetic heating module 600. Wherein, the electromagnetic heating cooking appliance 100 is configured such that at least part of the electromagnetic heating module 600 can rotate around the cooking container 300 when the cooking container 300 is located at least above the electromagnetic heating module 600 (e.g. the rotating disc rotates around the central axis of the rotating disc in the second accommodating cavity 705, so that the alternating magnetic field of the coil 606 rotates in the second accommodating cavity 705). Considering the limited length of the cable, the angle range of the above relative rotation is, for example, 360 / N degrees (±180 / N degrees), so that the heating positions can not be missed, and the cooking container 300 can be heated uniformly and comprehensively. In the illustrated embodiment, N = 3.

[0253] The relative rotation between the cooking container 300 and the magnetic field can occur when the first coil 606 is powered, i.e. the magnetic field of the electromagnetic heating module rotates while heating the cooking container 300, so that the cooking container 300 is uniformly heated and the horizontal temperature difference in the same horizontal plane between different parts inside the cooking container 300 is reduced. Alternatively, the relative rotation between the cooking container 300 and the magnetic field can occur alternately with the power-on of the first coil 606, i.e. not heating while rotating and not rotating while heating, so that the vertical temperature difference in the same vertical plane is reduced at each circumferential position. Uniform heating is achieved by operating for one cycle. Alternatively, the timing of heating and the timing of rotation are controlled separately. In this application, whether the rotation and the heating occur simultaneously or not, the heating position is changed by rotation, so that uniform heating is achieved.

[0254] The cooking process of the rice cooking of the cooking appliance 100, for example, includes sequentially a water absorbing process, a boiling process, a boiling maintaining process, a rice stewing process, and a temperature maintaining process. In the water absorbing process, the food material is fully absorbed with water to improve the taste. In the boiling process, the food material is heated to a temperature close to boiling with a high fire, and then boiled in the boiling maintaining process to make the food material substantially cooked. In the rice stewing process, the residual free water is dried to further cook the food material. Finally, in the temperature maintaining process, the food material is maintained at a temperature so that the user can eat hot food.

[0255] In each process, the electromagnetic heating module (specifically, the electromagnetic coil 606) as the heating device works in a power regulating manner. In each power regulating period, the electromagnetic coil 606 is powered for a preset power-on duration and powered off for a preset power-off duration, and the sum of the preset power-on duration and the preset power-off duration is the length of the power regulating period. Due to different cooking purposes or effects to be achieved, the average power of each process can be different, for example, the preset power-on duration of different processes is different. Also, due to the possible requirement of the cooking cavity for suitable temperature in each process, the power of the electromagnetic heating module in each process can not be constant (the preset power-on duration of the electromagnetic heating module in different power regulating periods in the same process is different), and can not be in the working state all the time (herein, the electromagnetic heating module in the power regulating period is considered to be in the working state).

[0256] According to the present application, the electromagnetic heating cooking appliance limits the eccentric rotation of the rotating disc through the rollers and the corresponding contact structures, so that the rotation of the rotating disc is more stable, and the rotation of the magnetic field is more stable, and the effect of the multi-point heat source rotation heating is better.

[0257] The processes and steps described in all the preferred embodiments described above are only examples. Unless an adverse effect occurs, various processing operations can be performed in an order different from the order of the processes described above. The order of the steps of the processes described above can also be added, combined or deleted according to actual needs.

[0258] In understanding the scope of the present application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of the stated features, elements, components, groups, integers, and / or steps, but do not exclude the presence of other unstated features, elements, components, groups, integers and / or steps. The foregoing also applies to like-terms, such as "comprise," "have," "include," and "contain," and all of their derivatives.

[0259] The term "attached" or "attaching" as used herein includes configurations wherein an element is directly secured to another element by affixing the element directly to the other element; configurations wherein the element is indirectly secured to the other element by affixing the element to an intermediate member that in turn is affixed to the other element; and configurations wherein one element is integral with the other element, i.e., one element is essentially a part of the other element. The definition also applies to words of similar import, such as "connected," "coupled," "engage with," "mount," "bonded," "fixed," and derivatives thereof. Finally, terms such as "substantially," "approximately," and "about" as used herein mean an acceptable quantity of deviation of the modified term so that the end result is not significantly changed.

[0260] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The features described herein in one embodiment can be applied to another embodiment, mutatis mutandis, unless the features are not applicable or are otherwise stated.

[0261] The present application has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and illustration, and are not intended to limit the present application to the scope of the described embodiments. Furthermore, those skilled in the art can understand that the present application is not limited to the above embodiments, and that more various modifications and changes can be made according to the teachings of the present application, and that such modifications and changes fall within the scope of the present application claimed.

Claims

1. An electromagnetic heating cooking appliance, characterized in that, include: The housing forms a receiving cavity; A turntable is disposed in the receiving cavity, the turntable being configured to rotate relative to the receiving cavity about its central axis; At least one coil for generating an alternating magnetic field when energized, the electromagnetic heating cooking appliance being configured such that the magnetic field strength of the alternating magnetic field is non-uniformly distributed in the circumferential direction of the turntable, wherein rotation of the turntable about its central axis relative to the receiving cavity causes the alternating magnetic field to rotate about its central axis relative to the receiving cavity. A cooking container, comprising a ferromagnetic material, is positioned substantially coaxially with the turntable within the magnetically inductive region of the coil; and A position correction mechanism is disposed between the turntable and the housing to limit the position of the turntable relative to the housing.

2. The electromagnetic heating cooking appliance according to claim 1, characterized in that, The position correction mechanism is at least one roller mechanism disposed on either the edge portion of the turntable or the housing.

3. The electromagnetic heating cooking appliance according to claim 2, characterized in that, The correction mechanism is provided with at least two roller mechanisms, and all roller mechanisms are arranged at intervals along the circumference of the turntable.

4. The electromagnetic heating cooking appliance according to claim 2, characterized in that, The roller mechanism is used to contact the edge portion of the turntable or the housing in the radial and / or axial directions of the turntable.

5. The electromagnetic heating cooking appliance according to claim 4, characterized in that, The roller mechanism includes rollers, and the maximum gap between the outer surface of the rollers and the edge portion of the turntable or the housing is 0.3-5 mm; and / or The roller mechanism is arranged at least three spaced apart along the circumference of the turntable in one of the edge portion of the turntable and the housing.

6. The electromagnetic heating cooking appliance according to claim 2, characterized in that, One of the edge portion of the turntable and the sidewall of the receiving cavity is provided with a plurality of roller mechanisms arranged at circumferential intervals along the turntable, the roller mechanisms being used to contact the other of the edge portion of the turntable and the sidewall of the receiving cavity radially and / or axially.

7. The electromagnetic heating cooking appliance according to claim 6, characterized in that, One of the edge portion of the turntable and the side wall of the receiving cavity is provided with a plurality of roller mechanisms arranged at intervals along the circumference of the turntable. The roller mechanism includes rollers, the axial direction of which is the same as the axial direction of the turntable. The other of the edge portion of the turntable and the side wall of the receiving cavity is provided with a groove extending along the circumference of the turntable. The groove is used to receive the rollers.

8. The electromagnetic heating cooking appliance according to claim 7, characterized in that, The maximum distance between the outer surface of the roller at its maximum radial dimension and the bottom of the groove along the radial direction of the turntable is 0.3-5 mm.

9. The electromagnetic heating cooking appliance according to claim 7, characterized in that, The sidewall of the receiving cavity is provided with the roller mechanism, and the edge portion of the turntable is provided with the groove.

10. The electromagnetic heating cooking appliance according to claim 9, characterized in that, The sidewalls of the receiving cavity include a first sidewall and a second sidewall arranged along the axial direction, the first sidewall being detachably connected to the second sidewall. One end of the roller's shaft is connected to the first sidewall, and the other end of the roller's shaft is connected to the second sidewall.

11. The electromagnetic heating cooking appliance according to claim 6, characterized in that, The inner circumferential surface of the sidewall of the receiving cavity is provided with an annular baffle, which is located on the side of the turntable facing the cooking container.

12. The electromagnetic heating cooking appliance according to claim 6, characterized in that, One of the edge portion of the turntable and the sidewall of the receiving cavity is provided with a plurality of roller mechanisms arranged at intervals along the circumference of the turntable. The roller mechanism includes rollers, the axial direction of which is perpendicular to the axial direction of the turntable. The other of the edge portion of the turntable and the sidewall of the receiving cavity is provided with an annular contact surface extending along the circumference of the turntable. The annular contact surface is used to contact the outer peripheral surface of the roller.

13. The electromagnetic heating cooking appliance according to claim 12, characterized in that, The annular contact surface includes a first annular contact surface and a second annular contact surface arranged in opposite directions along the axial direction of the turntable. The plurality of rollers are arranged in pairs, with the two rollers in each pair spaced apart along the axial direction of the turntable, and the first annular contact surface and the second annular contact surface located between the two rollers in each pair; or, the plurality of rollers are staggered along the axial direction of the turntable, wherein a portion of the rollers are used to contact the first annular contact surface, and another portion of the rollers are used to contact the second annular contact surface.

14. The electromagnetic heating cooking appliance according to claim 12, characterized in that, Multiple roller mechanisms are disposed on the sidewall of the receiving cavity, and the surface of the turntable includes the annular contact surface.

15. The electromagnetic heating cooking appliance according to any one of claims 1 to 14, characterized in that, The coil is disposed on the turntable, and the winding center of the coil is offset from the central axis of the turntable.

16. The electromagnetic heating cooking appliance according to claim 15, characterized in that, It also includes a mounting bracket that forms part of the housing, the mounting bracket comprising: The base wall of the mounting frame, the turntable is connected to the base wall of the mounting frame and is rotatable relative to the base wall of the mounting frame about the central axis of the turntable; and Mounting bracket sidewalls extend axially from the edge of the bottom wall of the mounting bracket, forming part of the sidewall of the receiving cavity, and the mounting bracket sidewalls are detachably connected to another part of the housing.

17. The electromagnetic heating cooking appliance according to claim 16, characterized in that, The turntable has a cylindrical portion protruding toward the bottom wall of the mounting frame along the axial direction of the turntable at its approximate center. The bottom wall of the mounting frame has a cylindrical portion protruding toward the turntable along the axial direction of the turntable. The cylindrical portion of the turntable is adapted to and rotatably connected to the cylindrical portion of the mounting frame, so that the cylindrical portion of the turntable can rotate relative to the cylindrical portion of the mounting frame around the central axis of the turntable.

18. The electromagnetic heating cooking appliance according to claim 17, characterized in that, The mounting bracket is provided with openings for the enameled wire of the coil or its connecting cable to pass through.

19. The electromagnetic heating cooking appliance according to claim 15, characterized in that, The coil is disposed on the side of the turntable facing away from the cooking container; and / or The turntable has a C-shaped cross-section.

20. The electromagnetic heating cooking appliance according to any one of claims 1 to 14, characterized in that, It also includes a cable reel, which is arranged coaxially with the turntable. The coil is mounted on the coil frame, and the center of the coil winding is located on the central axis of the coil frame. The turntable includes: The disc body, which is rotatable relative to the receiving cavity about the central axis of the turntable, and At least one first region and at least one second region are disposed on the turntable, the first region and the second region being alternately disposed on the turntable body along the circumferential direction of the turntable, the medium in the first region being different from the medium in the turntable body, so that the magnetic field strength of the alternating magnetic field in the first region is different from the magnetic field strength in the second region.

21. The electromagnetic heating cooking appliance according to claim 20, characterized in that, The disk body is made of a metallic material with a magnetic permeability of less than or equal to 10B / H, and the first region includes at least one opening for the magnetic field lines of the alternating magnetic field to pass through.

22. The electromagnetic heating cooking appliance according to claim 20, characterized in that, The disk body is made of a first material, and the first region is provided with at least one magnetic field line gathering member, which includes a second material different from the first material.

23. The electromagnetic heating cooking appliance according to claim 22, characterized in that, The first material is a non-magnetic material or a metal with a magnetic permeability of less than or equal to 10 B / H, and the second material is a metal with a magnetic permeability of greater than or equal to 100 B / H.

24. The electromagnetic heating cooking appliance according to claim 20, characterized in that, The axial cross-section of the coil frame and the coil body is a generally parallel C-shaped structure; and / or The coil is disposed on the side of the coil holder facing away from the cooking container.

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