Electromagnetic heating module and electromagnetic heating cooking utensil

Abstract

The utility model discloses an electromagnetic heating module and an electromagnetic heating cooking utensil. The electromagnetic heating module is used for electromagnetically heating the cooking utensil. The electromagnetic heating module comprises a mounting rack, a turntable and at least one coil. The mounting rack is used for being detachably connected to the electromagnetic heating cooking utensil. The turntable is connected to the mounting rack and is configured to be rotatable relative to the mounting rack around a central axis of the turntable. The coil is used for generating an alternating magnetic field after being electrified, and the electromagnetic heating module is constructed to enable the magnetic field intensity of the alternating magnetic field to be non-uniformly distributed in the circumferential direction of the turntable. The rotation of the rotating disc around the central axis of the rotating disc relative to the mounting frame enables the alternating magnetic field to rotate around the central axis of the rotating disc relative to the mounting frame. According to the electromagnetic heating module, the whole electromagnetic heating module can be pre-assembled into a whole by means of the mounting frame, scattered parts are prevented from being mounted on the cooking utensil one by one, the mounting precision is high, and assembling is convenient.

Description

Technical Field

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

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

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

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

[0005] To at least partially solve the above problems, the first aspect of this application provides an electromagnetic heating module for electromagnetic heating cooking appliances, comprising:

[0006] Mounting bracket for detachable connection to the electromagnetic heating cooking appliance;

[0007] A turntable, connected to the mounting bracket, the turntable being configured to rotatable relative to the mounting bracket about its central axis; and

[0008] At least one coil is provided, which generates an alternating magnetic field when energized. The electromagnetic heating module is configured such that the magnetic field strength of the alternating magnetic field is non-uniformly distributed in the circumferential direction of the turntable.

[0009] The rotation of the turntable around its central axis relative to the mounting frame causes the alternating magnetic field to rotate around the central axis of the turntable relative to the mounting frame.

[0010] According to this application, the rotation of the magnetic field can achieve the effect of multi-point heat source rotation heating, ensuring even heating of the cooking container. The electromagnetic heating module can be installed onto the cooking appliance using a mounting bracket, allowing the electromagnetic heating module to be pre-assembled as a whole before installation in the cooking appliance. This avoids installing individual components one by one, preventing the installation accuracy of the components from affecting the installation position, ensuring high installation precision among the multiple components of the electromagnetic heating module, facilitating assembly in the cooking appliance, guaranteeing normal operation and cooking effect of the cooking appliance, and improving the user experience.

[0011] Optionally, the electromagnetic heating module further includes:

[0012] A drive unit, disposed on the mounting bracket, is used to provide a driving force to rotate the turntable; and

[0013] A transmission device that connects the turntable and the drive device.

[0014] According to this application, the drive unit is mounted on the mounting bracket, which further enhances the integrated design of the electromagnetic heating module.

[0015] Optionally,

[0016] The driving device includes a motor;

[0017] The transmission device includes:

[0018] The first gear is coaxially connected to the turntable, and

[0019] The second gear is coaxially connected to the output shaft of the motor and meshes with the first gear.

[0020] According to this application, the drive device and transmission device are simple to control, have stable performance, and are inexpensive.

[0021] Optionally,

[0022] The first gear and the second gear are non-metallic gears; and / or

[0023] The first gear and / or the second gear are configured with weight-reducing holes.

[0024] According to this application, non-metallic gears can avoid electromagnetic interference with coils. Weight-reducing holes can lower the weight of the transmission device and reduce the load on the drive device.

[0025] Optionally, the ratio of the number of teeth of the second gear to the number of teeth of the first gear is any one of 1:1, 1:2, 1:3 and 1:4.

[0026] According to this application, the gear ratio can be flexibly set.

[0027] Optionally, the electromagnetic heating module further includes a magnetic shield covering the motor to isolate electromagnetic interference between the motor and the coil.

[0028] According to this application, the magnetic shield can prevent electromagnetic interference between the motor and the coil.

[0029] Optionally, the turntable has a cylindrical portion protruding toward the mounting frame along the axial direction of the turntable at approximately its central portion, and 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 about the central axis of the turntable.

[0030] According to this application, the mounting bracket and the turntable achieve relative rotation through a matching sleeve connection.

[0031] Optionally, at least one of the mounting frame cylindrical portion and the turntable cylindrical portion is located in the other of the mounting frame cylindrical portion and the turntable cylindrical portion, and the turntable cylindrical portion and the mounting frame cylindrical portion are connected by a rotary joint structure, wherein the axis of the rotary joint structure coincides with the central axis of the turntable.

[0032] According to this application, the rotary joint structure enables the turntable to rotate stably.

[0033] Optionally,

[0034] The slewing joint structure is configured as a rolling slewing joint structure or a sliding slewing joint structure; and / or

[0035] The rotary joint structure is made of non-metallic materials.

[0036] According to this application, the slewing pair structure can be flexibly configured and electromagnetic interference with the coil can be avoided.

[0037] Optionally, the outer peripheral surface of one of the mounting frame cylindrical portion and the turntable cylindrical portion is provided with a first surface extending radially, and the inner peripheral surface of the other of the mounting frame cylindrical portion and the turntable cylindrical portion is provided with a second surface extending radially, and the rotary joint structure is located between the first surface and the second surface.

[0038] According to this application, the first and second surfaces position the rotary joint structure axially.

[0039] Optionally, the electromagnetic heating module further includes a temperature sensor, which is disposed in the cylindrical portion of the turntable.

[0040] According to this application, the electromagnetic heating module can monitor the heating temperature through a temperature sensor, which does not rotate with the turntable.

[0041] Optionally, the inner circumferential surface of the cylindrical portion of the mounting bracket is provided with a third surface extending in the radial direction.

[0042] The electromagnetic heating module also includes a spring, which is located between the temperature sensor and the third surface.

[0043] The third surface is connected to a through hole for the cable of the temperature sensor to pass through.

[0044] According to this application, the spring ensures that the temperature sensor is in close contact with the cooking container.

[0045] Optionally, the electromagnetic heating module further includes a blocking structure, the blocking structure comprising:

[0046] A blocking ring, wherein the radial direction of the blocking ring is the radial direction of the turntable, the outer diameter of the blocking ring is larger than the inner diameter of the cylindrical portion of the turntable, and the inner diameter of the blocking ring is smaller than the maximum outer diameter of the temperature sensor; and

[0047] The connecting part has one end connected to the radial middle part of the blocking ring, the connecting part extends into the cylindrical part of the turntable along the axial direction of the turntable, and the other end of the connecting part is connected to the mounting bracket.

[0048] According to this application, the blocking structure can prevent the turntable from moving away from the mounting bracket axially and can also prevent the temperature sensor from falling out of the cylindrical part of the turntable.

[0049] Optionally, the mounting bracket cylindrical portion is located in the turntable cylindrical portion, and the connecting portion is constructed in a cylindrical shape and screwed to the mounting bracket cylindrical portion.

[0050] According to this application, the electromagnetic heating module has a compact structure.

[0051] Optionally, the coil is disposed on the turntable, and the winding center of the coil is offset from the central axis of the turntable.

[0052] According to this application, the electromagnetic heating module achieves a non-uniform magnetic field along the circumferential direction of the turntable by deviating the winding center of the coil from the central axis of the turntable.

[0053] Optionally,

[0054] The coil is disposed on the side of the turntable facing the mounting bracket; and / or

[0055] The turntable has a C-shaped cross-section.

[0056] According to this application, the coil is located on the side of the turntable facing the mounting bracket, which can conceal the coil and protect it. The turntable has a C-shaped axial 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.

[0057] Optionally, the electromagnetic heating module further includes at least one winding frame, which is arranged correspondingly to the coil, the coil is disposed on the winding frame, and the winding frame is disposed on the turntable.

[0058] According to this application, the winding frame is advantageous for pre-winding the coil into the desired shape.

[0059] Optionally, the winding frame is also provided with at least one magnetic conductor.

[0060] According to this application, the magnetic conductor can concentrate the magnetic field of the coil, which is beneficial to improving heating efficiency.

[0061] Optionally, the electromagnetic heating module further includes a wire coil frame, which is arranged coaxially with the turntable.

[0062] 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.

[0063] The turntable includes:

[0064] A disk body, connected to the mounting bracket, the disk body being rotatable relative to the mounting bracket about the central axis of the turntable, and

[0065] 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.

[0066] According to this application, the electromagnetic heating module achieves a non-uniformly distributed magnetic field along the circumference of the rotating disk by designing a rotating disk with a non-uniform medium.

[0067] Optionally, 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.

[0068] According to this application, the first region of the turntable allows magnetic field lines to pass through, while the second region allows almost no magnetic field lines to pass through, thereby creating a non-uniformly distributed magnetic field along the circumferential direction of the turntable.

[0069] Optionally, the disk body is made of a first material, and the first region is provided with at least one magnetic field converging element, the magnetic field converging element comprising a second material different from the first material.

[0070] Furthermore, the first material is a non-magnetic material or a metal with a permeability of less than or equal to 10 B / H, and the second material is a metal with a permeability of greater than or equal to 100 B / H.

[0071] According to this application, by setting a material different from the disk body in the first region, the magnetic permeability of the first region is different from that of the second region, thereby forming a non-uniform magnetic field.

[0072] Optionally,

[0073] The axial cross-section of the coil frame and the coil body is a generally parallel C-shaped structure; and / or

[0074] The coil is disposed on the side of the coil holder facing the mounting bracket.

[0075] According to this application, the coil holder and turntable have 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. The coil is located on the side of the turntable facing the mounting bracket, which can conceal the coil and protect it.

[0076] Optionally, the mounting bracket is provided with an opening for the enameled wire of the coil or its connecting cable to pass through.

[0077] 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.

[0078] Optionally,

[0079] The mounting bracket has a wire groove on the side facing away from the turntable for accommodating the enameled wire or its connecting cable; and / or

[0080] A wire clip is provided on the side of the mounting bracket facing away from the turntable for limiting the enameled wire or its connecting cable.

[0081] According to this application, cable trays and cable clips facilitate the guidance and fixation of cables, preventing cable tangling.

[0082] Optionally, the electromagnetic heating module further includes a retaining ring, the retaining ring comprising:

[0083] An annular wall, extending axially along the turntable and located on the outer periphery of the turntable, is connected to the mounting bracket; and

[0084] An annular baffle extends around the inner circumferential surface of the annular wall and is located on the side of the turntable facing away from the mounting bracket. In the projection of the electromagnetic heating module along the axial direction of the turntable, the annular baffle coincides with the outer circumferential edge of the turntable around the circumferential direction.

[0085] According to this application, the annular baffle can block the gaps around the turntable, which is both aesthetically pleasing and prevents foreign objects from entering the electromagnetic heating module and affecting the rotation of the turntable.

[0086] Optionally, the annular wall is used for detachable connection to the cooking appliance.

[0087] According to this application, the electromagnetic heating module is installed in the cooking appliance at the location of the annular wall.

[0088] A second aspect of this application provides an electromagnetic heating cooking appliance, comprising:

[0089] Receiving cavity;

[0090] The electromagnetic heating module according to any one of the first aspects is disposed in the receiving cavity, wherein the mounting bracket is detachably connected to the cavity wall of the receiving cavity; and

[0091] A cooking container, comprising a ferromagnetic material, is positioned substantially coaxially with the turntable within the magnetically inductive region of the coil.

[0092] According to this application, the rotation of the magnetic field can achieve the effect of multi-point heat source rotation heating, which improves cooking quality but also increases structural complexity. The electromagnetic heating module as a whole can be installed onto the cooking appliance using a mounting bracket, allowing the electromagnetic heating module to be pre-assembled as a whole before being installed in the cooking appliance. This avoids installing individual components one by one, avoiding the influence of the installation accuracy of the components at the mounting position, ensuring high installation accuracy between the multiple components of the electromagnetic heating module, facilitating assembly in the cooking appliance, ensuring the normal operation of the cooking appliance and the cooking effect, and improving the user experience. Attached Figure Description

[0093] The following drawings, which are incorporated herein by reference as part of this application, are used to understand the application. The drawings illustrate representative embodiments of the application and are intended to explain the principles of the application, not to limit it. In the drawings:

[0094] Figure 1 This is a side cross-sectional schematic diagram of an electromagnetic heating cooking appliance according to the first embodiment of this application;

[0095] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0096] Figure 3 for Figure 1 A top view of the electromagnetic heating module of the electromagnetic heating cooking appliance shown.

[0097] Figure 4 for Figure 1 A bottom view of the electromagnetic heating module of the electromagnetic heating cooking appliance shown.

[0098] Figure 5 for Figure 1 An exploded view of the electromagnetic heating module of the electromagnetic heating cooking appliance shown.

[0099] Figure 6 for Figure 1 Another exploded view of the electromagnetic heating module of the electromagnetic heating cooking appliance shown, in which some components are assembled;

[0100] Figure 7 for Figure 1 The diagram shows a further exploded view of the electromagnetic heating module of the electromagnetic heating cooking appliance, with some components assembled in the diagram.

[0101] Figure 8 for Figure 6 A three-dimensional schematic diagram of the retaining ring in the middle;

[0102] Figure 9 for Figure 1 An exploded view of the electromagnetic heating cooking appliance shown.

[0103] Figure 10 for Figure 1 The diagram shows a three-dimensional representation of the electromagnetic heating module of the electromagnetic heating cooking appliance, with the wiring structure shown.

[0104] Figure 11 for Figure 1 Another three-dimensional schematic diagram of the electromagnetic heating module of the electromagnetic heating cooking appliance shown;

[0105] Figure 12 for Figure 1 A three-dimensional schematic diagram of a portion of the electromagnetic heating module of the electromagnetic heating cooking appliance shown.

[0106] Figure 13 for Figure 1 The diagram shows a partial structure of the electromagnetic heating module of an electromagnetic heating cooking appliance, where the coil is relative to... Figure 12 The position in the middle was rotated counterclockwise by one angle;

[0107] Figure 14 for Figure 1 The diagram shows a partial structure of the electromagnetic heating module of an electromagnetic heating cooking appliance, where the coil is relative to... Figure 12 The position in the middle was rotated clockwise by one angle;

[0108] Figure 15 This is a side cross-sectional view of a partial structure of an electromagnetic heating cooking appliance according to a second embodiment of this application, showing the electromagnetic heating module and the cooking container, with only the portion of the mounting bracket shown for shaft connection.

[0109] Figure 16 for Figure 15 An exploded 3D diagram of the electromagnetic heating module in the image;

[0110] Figure 17 This is an exploded perspective view of the electromagnetic heating module of an electromagnetic heating cooking appliance according to the third embodiment of this application, wherein only the part of the mounting bracket used for shaft connection is shown.

[0111] Figure 18 This is a side cross-sectional view of a partial structure of an electromagnetic heating cooking appliance according to a third embodiment of this application, showing the electromagnetic heating module and the cooking container, with only the portion of the mounting bracket shown for shaft connection.

[0112] Figure 19 for Figure 18 A three-dimensional exploded diagram of the structure.

[0113] Explanation of reference numerals in the attached figures:

[0114] 100: Cooking utensils

[0115] 200: Cover

[0116] 300: Cooking containers

[0117] 400: Control device

[0118] 401: Third connecting hole

[0119] 500: Base

[0120] 600 / 600A / 600B / 600C: Electromagnetic heating module

[0121] 601: Stop ring

[0122] 602: Barrier Structure

[0123] 603: Cable Reel

[0124] 604: Rotary joint structure

[0125] 605: Temperature sensor

[0126] 606: Electromagnetic coil

[0127] 607: Winding stand

[0128] 608: Magnetic Conductor

[0129] 609: First Gear

[0130] 610: Mounting bracket

[0131] 611: Second Gear

[0132] 612: Magnetic shield

[0133] 613: Electric motor

[0134] 614: First main cable

[0135] 615: Second main cable

[0136] 616: Screw

[0137] 617: Screws

[0138] 618: Screws

[0139] 619: Screws

[0140] 620: Line Card

[0141] 621: First Card Slot

[0142] 622: Second card slot

[0143] 623: Line Card

[0144] 624: Line Card

[0145] 625: Motor cable

[0146] 626: Temperature sensor cable

[0147] 627: Circular retaining rib

[0148] 628: First connecting hole

[0149] 629: Second connecting hole

[0150] 630: Roller

[0151] 631: Spring

[0152] 632: Positioning slot

[0153] 633: Groove

[0154] 635: Rotary drum assembly section

[0155] 641: First Surface

[0156] 642: Second Surface

[0157] 643: Third Surface

[0158] 644: Cable guide hole

[0159] 645: Installation frame cylindrical part

[0160] 646: Connecting Ear

[0161] 647: Circular wall

[0162] 651: Blocking section

[0163] 652: Connecting part

[0164] 658: Mounting bracket notch

[0165] 661: First cylindrical part of the mounting bracket

[0166] 662: Second cylindrical part of the mounting bracket

[0167] 663: Third cylindrical part of the mounting bracket

[0168] 664: Position Detection Component

[0169] 665: First triggering device

[0170] 666: Second triggering device

[0171] 667: Position detection component cable

[0172] 680: Cable Reel

[0173] 685: Cylindrical part of the coil frame

[0174] 688: Gauge gap

[0175] 690: Turntable

[0176] 691: Area 1

[0177] 692: Second Region

[0178] 693: Disk body

[0179] 695: Magnetic field line gathering component

[0180] 696: Heat dissipation holes

[0181] 700: Claypot

[0182] 701: Medium plate

[0183] 702: Connecting Post

[0184] 703: Inner cylinder

[0185] 705: Receiving cavity

[0186] 706: Accommodation cavity sidewall

[0187] 707: Casing

[0188] P1: Central axis of electromagnetic heating module

[0189] P2: Central axis of the cooking container

[0190] P3: Turntable center axis

[0191] P4: Center axis of the cable tray Detailed Implementation

[0192] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0193] To fully understand this application, a detailed description will be provided in the following description. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other embodiments.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] This application provides an electromagnetic heating module and an electromagnetic heating cooking appliance having the electromagnetic heating module.

[0199] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings.

[0200] 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 receiving cavity 705 of the pot body 700. The IH heating module 600 is disposed, for example, at the bottom of the receiving cavity 705. Thus, the cooking container 300 and the electromagnetic heating module 600 are detachably placed in the magnetically inductive area of ​​the electromagnetic heating module 600. The 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.

[0201] The pot body 700 includes, for example, a shell 707, a middle plate 701, and an inner cylinder 703. The middle plate 701 is located inside the 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 middle plate 701 and extends vertically. The base 500 is connected, for example, to the shell 707 and / or the middle plate 701. More broadly, the shell 707 and the base 500 enclose a receiving cavity 705, which is separated by the middle plate 701 and the inner cylinder 703. The shell 707, base 500, middle plate 701, and inner cylinder 703 all provide walls for the receiving cavity 705. The space between the middle plate 701 and the shell 707 can be used to mount components of the pot body 700, such as a fan, circuit board, etc. The interior of the inner cylinder 703 is used to house the cooking container 300. The inner cylinder 703 surrounds the cooking container 300. By incorporating the inner cylinder 703, the heat generated by the cooking container 300 is reflected back to the cooking container 300, preventing heat loss and overheating of the pot body 700. This improves both the heat retention of the cooking container 300 and the safety of the cooking appliance 100. The inner cylinder 703 can be understood as a side wall of the receiving cavity 705. The base 500 provides the bottom wall of the receiving cavity 705.

[0202] The electromagnetic heating module 600 has a 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 central axis P2. The cooking container 300 is generally in the shape of a body of revolution about the central axis P2 (e.g., with a circular cross-section). The cooking container 300 is used to be disposed within the magnetically inductive region of the electromagnetic heating module 600, for example, it is disposed detachably from the electromagnetic heating module within this magnetically inductive region. When the cooking container 300 is placed in the receiving cavity 705, the central axis P2 of the cooking container coincides with or substantially coincides with the central axis P1 of the electromagnetic heating module. Thus, the alternating magnetic field of the electromagnetic heating module 600 is non-uniformly distributed along the circumference of the cooking container 300.

[0203] 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.

[0204] 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.

[0205] Specifically, such as Figures 2 to 4 As shown, the electromagnetic heating module 600 includes, for example, a coil disk 603, at least one electromagnetic coil 606, a mounting bracket 610, 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 and is rotatable relative to the mounting bracket 610 about the central axis P3 of the turntable. Mounting bracket 610 is a component that supports the various functional parts within the electromagnetic heating module 600, such as for detachable connection to the cavity wall (e.g., inner cylinder 703 or base 500) of the receiving cavity 705. Mounting bracket 610 is, for example, constructed in a basin shape. A drive unit is disposed on mounting bracket 610 to provide driving force for rotating turntable 603. A transmission device connects coil disc 603 and drive unit, thereby driving coil disc 603 to rotate via transmission device.

[0206] 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.

[0207] The electromagnetic heating module 600 can be mounted onto the cavity wall of the receiving cavity 705 using the mounting bracket 610. This allows the electromagnetic heating module to be pre-assembled as a whole before being installed in the receiving cavity 705. This avoids installing individual components one by one into the receiving cavity 705, 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.

[0208] For example, such as Figure 2 and Figure 3 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.

[0209] 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.

[0210] 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.

[0211] The magnetic field strength is strong and the heating effect is obvious in the area with coil 606; the magnetic field strength is weak and the heating effect is not obvious in the area between two coils 606. The rotation of turntable 603 around the central axis P3 of the turntable relative to the mounting bracket 610 causes the alternating magnetic field of coil 606 to rotate around the central axis P3 of the turntable relative to the mounting bracket 610. By setting non-concentric coils, a multi-point heat source rotation heating effect can be achieved in the cooking appliance 100, thereby realizing a variable heating convection pattern. This enables complex and varied convection and tumbling patterns and effects inside the cooking container 300, making food heated more evenly and improving the undesirable phenomenon of rice being overcooked or dry in some areas after cooking.

[0212] like Figure 2 As shown, the turntable 603 has a C-shaped cross-section, with the cooking container 300 located inside the C-shaped structure. This allows the turntable 603 to conform to the bottom shape of the cooking container 300, reducing the distance between the alternating magnetic field and the cooking container 300. This allows the alternating magnetic field to act more effectively on the cooking container 300, improving heating efficiency. The coil 606 is positioned on the side of the turntable 603 facing the mounting bracket 610 to avoid exposure within the receiving cavity 705. The coil 606 is located on the outside of the C-shaped structure.

[0213] Optionally, such as Figure 2 and Figure 5 As shown, the coil plate 603 is provided with a positioning groove 632 protruding towards the cooking container 300 of the cooking appliance 100. The electromagnetic coil 606 is disposed on the bottom surface of the coil plate 603 and located in the positioning groove 632. The top of the positioning groove 632 protrudes from the inner surface of the coil plate 603, forming a boss structure. By providing the positioning groove 632 on the coil plate 603, it is convenient to install and position the electromagnetic coil 606, and it can also prevent the electromagnetic coil 606 from moving on the bottom surface of the coil plate 603, thereby improving the stability of the electromagnetic coil 606.

[0214] Optionally, such as Figure 2 and Figure 5As shown, the electromagnetic heating module 600 also includes a winding frame 607, which is disposed in the positioning groove 632. The winding frame 607 is correspondingly disposed with the electromagnetic coil 606, and the electromagnetic coil 606 is disposed on the winding frame 607, that is, coiled on the winding frame 607. The winding frame 607 may be constructed as a sandwich structure, with a winding post disposed at the center of the sandwich, and the enameled wire of the coil 606 is coiled around the winding post in the sandwich as a disc-shaped winding. The winding frame 607 and the coil disc 603 can be connected by screws to achieve fixation in the positioning groove 632. By disposing of the electromagnetic coil 606 in a coiled state in the winding frame 607, it is convenient to assemble the electromagnetic coil 606 on the coil disc 603, and it can also effectively prevent the electromagnetic coil 606 from falling apart, thereby improving the stability of the electromagnetic coil 606 itself.

[0215] Optionally, such as Figure 2 , Figure 4 and Figure 5 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.

[0216] Optionally, such as Figures 2 to 5 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 603. Through stepper motor rotation control and transmission device, the coil 603 can achieve forward and reverse rotation, intermittent rotation, and stepless speed regulation. Preferably, the electromagnetic heating module 600 also includes a magnetic shielding cover 612, which covers the motor 613 to isolate electromagnetic interference between the motor 613 and the electromagnetic coil 606. The magnetic shielding cover 612 can be made of materials with magnetic shielding functions such as aluminum or copper.

[0217] Optionally, such as Figures 2 to 5As 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 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.

[0218] 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.

[0219] Optionally, the gear ratio between the second gear 611 and the first gear 609 can be any one of 1:1, 1:2, 1:3, and 1:4. Considering the product's space layout, a gear ratio of 1:3 is preferred to facilitate stepper motor speed adjustment and rotation angle control. For example, the transmission result allows the coil disk 603 to rotate within a range of 0.1 r / min to 10 r / min. A preferred rotational speed is 1 r / min.

[0220] Optionally, such as Figure 2 and Figures 5 to 7 As shown, a cylindrical portion 635 protruding towards the mounting bracket 610 along the axial direction of the turntable 603 is provided at approximately the center of the turntable 603. The mounting bracket 610 is provided with a cylindrical portion 645 protruding towards the turntable 603 along the axial direction of the turntable 603. The cooking appliance 100 is constructed such that the cylindrical portion 635 of the turntable and the cylindrical portion 645 of the mounting bracket are adapted to and rotatably connected, allowing the cylindrical portion 635 of the turntable to rotate relative to the cylindrical portion 645 about the central axis P3 of the turntable. Therefore, the turntable 603 can rotate relative to the mounting bracket 610 about the central axis P3 of the turntable.

[0221] Specifically, the cooking appliance 100 is constructed such that at least one of the mounting bracket cylindrical portion 645 and the turntable cylindrical portion 635 is located in the other of the mounting bracket cylindrical portion 645 and the turntable cylindrical portion 635. The turntable cylindrical portion 635 and the mounting bracket cylindrical portion 645 are connected by a rotary joint structure 604, wherein the axis of the rotary joint structure 604 coincides with the central axis P3 of the turntable. The rotary joint structure 604 is, for example, a bearing. The turntable cylindrical portion 635 and the mounting bracket cylindrical portion 645 are, for example, cylinders, nested together, with the axial direction of both cylinders being the axial direction of the turntable 603. The bearing is located between the two cylinders and is tightly fitted to each of the two cylinders. By providing the rotary joint structure 604 in the middle of the mounting bracket 610 to support the rotation of the coil 603, the stability of the rotation of the coil 603 is improved, avoiding eccentric rotation that would affect the fit between the mechanisms.

[0222] The rotary joint structure 604 can be configured as a rolling rotary joint structure or a sliding rotary joint structure. Optionally, the rotary joint structure 604 is made of a non-metallic material, such as a non-metallic bearing, specifically plastic, ceramic, or other non-metallic materials. Since the rotary joint structure 604 is close to the coil, by making the rotary joint structure 604 a non-metallic component, electromagnetic induction with the coil 606 can be avoided.

[0223] In the illustrated embodiment, the turntable cylindrical portion 635 is on the outside, and the mounting bracket cylindrical portion 645 is on the inside. Alternatively, the turntable cylindrical portion 635 can be on the inside, and the mounting bracket cylindrical portion 645 on the outside. The first gear 609 can, for example, be fitted onto the outer peripheral surface of the turntable cylindrical portion 635 of the coil disk 603, with the two connected by a key. Alternatively, the coil disk 603 can be integrally injection molded with the first gear 609.

[0224] Preferably, such as Figure 2 As shown, the outer peripheral surface of one of the mounting frame cylindrical portion 645 and the turntable cylindrical portion 635, located on the inner side, is provided with a first surface 641 extending radially, and the inner peripheral surface of the other of the mounting frame cylindrical portion 645 and the turntable cylindrical portion 635 is provided with a second surface 642 extending radially. The first surface 641 and the second surface 642 are spaced apart along the axial direction of the turntable 603. The rotary joint structure 604 is located between the first surface 641 and the second surface 642, thereby limiting the rotary joint structure 604 in the axial direction.

[0225] Optionally, such as Figure 2 , Figure 3 and Figure 5As shown, the electromagnetic heating module 600 also includes a temperature sensor 605. The top of the temperature sensor 605 passes through the coil 603 to resiliently contact the cooking container 300 of the cooking appliance 100. The temperature sensor 605 is disposed in the turntable cylindrical portion 635. The temperature sensor 605 can be an NTC type temperature sensor. The electromagnetic heating module 600 also includes a spring 631. A third surface 643 extending radially is provided on the inner circumferential surface of the mounting bracket cylindrical portion 645, and the spring 631 is located between the temperature sensor 605 and the third surface 643. For example, the spring 631 is disposed below the temperature sensor 605, the lower end of the spring 631 is supported on the mounting bracket 610, and the upper end of the spring 631 pushes the temperature sensor 605, thereby enabling the temperature sensor 605 to resiliently contact the cooking container 300 and ensure temperature measurement effectiveness. The third surface 643 of the mounting bracket 610 is connected to the wire hole 644. That is, the inner circumferential surfaces of the third surface 643 and the wire hole 644 are both part of a continuous surface of the mounting bracket 610, wherein the wire hole 644 is used to allow the cable 626 of the temperature sensor 605 to pass through.

[0226] Both the turntable cylindrical portion 635 and the mounting bracket cylindrical portion 645 are hollow, which is precisely for mounting the temperature sensor 605. The temperature sensor 605 does not rotate with the turntable 603.

[0227] Optionally, such as Figure 2 , Figure 3 and Figure 6 As shown, the electromagnetic heating module 600 also includes a blocking structure 602. The blocking structure 602 includes, for example, a blocking portion 651 and a connecting portion 652. The blocking portion 651 is configured as a blocking ring with its radial direction being the radial direction of the turntable 603. The connecting portion 652 extends substantially perpendicular 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 a mounting bracket 610, such as a mounting bracket cylindrical portion 645. The connecting portion 652 extends along the axial direction of the turntable 603, for example, configured as a sleeve (also called a blocking structure cylindrical portion). The connecting portion 652 is located in the turntable cylindrical portion 635 and connected to the mounting bracket 610 (e.g., snap-fit ​​or threaded connection). The blocking structure 602 is fixed to the mounting bracket 610 and thus does not rotate with the turntable 603.

[0228] One end of the connecting portion 652 is connected to the middle portion of the radial width of the blocking ring of the blocking portion 651 (not necessarily the midpoint of the blocking ring's width). The outer diameter of the blocking ring of the blocking portion 651 is larger than the inner diameter of the rotary cylindrical portion 635. The inner diameter of the blocking ring of the blocking portion 651 is smaller than the maximum outer diameter of the temperature sensor 605. The portion of the blocking ring located radially outward of the connecting portion 652 is used to cover the port of the rotary cylindrical portion 635, that is, to extend outward from the edge of the rotary cylindrical portion 635 along the radial direction of the rotary disk 603, so as to prevent the rotary disk 603 from moving away from the mounting bracket 610 along the axial direction of the rotary disk 603. The portion of the blocking ring located radially inward of the connecting portion 652 is used to limit the temperature sensor 605, and the through hole in the middle of the blocking ring is used to expose the temperature sensor 605, which can extend out of the through hole under the action of the spring 631.

[0229] Optionally, such as Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, the electromagnetic heating module 600 also includes a retaining ring 601. The retaining ring 601 includes, for example, an annular wall 647 and an annular retaining rib 627. The annular wall 647 extends along the axial direction of the turntable 603 and is located on the outer periphery of the turntable 603. The annular wall 647 is connected to the mounting bracket 610. The annular retaining rib 627 extends around the inner circumferential surface of the annular wall 647. The annular retaining rib 627 is located on the side of the turntable 603 facing away from the mounting bracket 610. In the projection of the electromagnetic heating module 600 along the axial direction of the turntable 603, the annular retaining rib 627 coincides with the outer periphery edge of the turntable 603 around its circumferential direction. The mounting bracket 610 completely encloses the turntable 603 from below, the retaining ring 601 is located on the top of the mounting bracket 610, and the annular retaining rib 627 can cover the gaps around the turntable 603, which is both aesthetically pleasing and prevents foreign objects from entering the electromagnetic heating module 600 and affecting the rotation of the turntable 603.

[0230] At least one of the mounting bracket 610 and the retaining ring 601 can be directly and detachably connected to the cavity wall of the receiving cavity 705, such as 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. Figure 9As shown, the middle plate 701 has multiple connecting posts 702 extending towards the mounting bracket 610 on the outer side of the inner cylinder 703. The outer side of the annular wall 647 of the retaining ring 601 has a corresponding first connecting hole 628. The connecting posts 702 are connected to the first connecting hole 628 by screws, thus connecting the retaining ring 601 to the middle plate 701. The outer side of the annular wall 647 of the retaining ring 601 also has a second connecting hole 629. The edge of the mounting bracket 610 has a corresponding connecting lug 646. The retaining ring 601 and the mounting bracket 610 can be detachably connected by screws 619, thus achieving a detachable connection between the electromagnetic heating module 600 and the middle plate 701. The retaining ring 601 is detachably connected to the cavity wall of the receiving cavity 705. The mounting bracket 610 is detachably connected to the retaining ring 601, thereby indirectly and detachably connected to the cavity wall of the receiving cavity 705. Alternatively, the mounting bracket 610 can be directly and detachably connected to the cavity wall of the receiving cavity 705.

[0231] Optionally, such as Figure 2 , Figure 5 and Figure 6 As shown, the electromagnetic heating module 600 also includes a roller 630. The roller 630 is disposed between the mounting bracket 610 and the retaining ring 601. A groove 633 is provided on the outer edge of the coil 603 to accommodate the roller 630. The outer edge of the coil 603 is connected to the roller 630 through the groove 633 and is supported and rotated by the roller 630. Under normal temperature conditions, the groove 633 and the roller 630 do not contact each other. During cooking and heating, the coil 603 deforms due to heat, and the groove 633 contacts the roller 630, so that the roller 630 limits the coil 603 in the axial and / or radial direction. By providing the roller 630 for support on the outer edge of the coil 603, the electromagnetic heating module 600 avoids eccentric rotation and heat-induced warping deformation, improves the stability of the coil 603's rotation, and ensures smooth rotation of the coil 603.

[0232] Optionally, such as Figures 1 to 5 and Figures 9 to 14 As shown, the cooking appliance 100 also includes a control device 400. The control device 400 is used to control the operation of all the electronic components of the cooking appliance 100. The control device 400 can be located in any one of the mounting bracket 610, the middle plate 701, and the base 500. Preferably, the control device 400 is located in the mounting bracket 610 and is electrically connected to the electromagnetic coil 606, the motor 613, and the temperature sensor 605 via cables, respectively. Figure 9 As shown, a third connection hole 401 is provided on one side of the control device 400, which can be connected to the mounting bracket 610 by screws. By connecting the control device 400 to the mounting bracket 610, the control device 400 and the mounting bracket 610 can be assembled together, thereby pre-connecting with the electromagnetic heating module 600, making the installation of the electromagnetic heating module 600 in the receiving cavity 705 easier.

[0233] 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.

[0234] like Figure 9 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.

[0235] 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 623 are provided on the side of the mounting bracket 610 to limit the movement of the temperature sensor cable 626. Cable clips 624 are also provided at the bottom of the mounting bracket 610 to limit the movement of the motor cable 625.

[0236] The electromagnetic heating module 600 is constructed such that the alternating magnetic field has N strong magnetic regions and N weak magnetic regions alternately distributed along the circumferential direction of the electromagnetic heating module 600, wherein the magnetic field strength of the strong magnetic regions is greater than that of the weak magnetic regions. Preferably, the N strong magnetic regions and the N weak magnetic regions are equally spaced along the circumferential direction of the electromagnetic heating module 600. Considering the limited length of the connecting cable of the enameled wire of the coil 606, the rotation angle range of the turntable 603 is, for example, 360 / N degrees (±180 / N degrees), so that no part is missed during heating, and the cooking container 300 is heated evenly and comprehensively. In the illustrated embodiment, N=3.

[0237] like Figure 7 and Figures 11 to 14 As shown, the electromagnetic heating module 600 also includes a position detection component 664 for detecting the rotational position of the coil disk 603, i.e., the rotational position of the coil 606. For example, the position detection component 664 is disposed on the mounting bracket 610 and electrically connected to the control device 400. For example, the position detection component 664 is electrically connected to the control device 400 via a cable 667. The coil disk 603 is provided with triggering devices (a first triggering device 665 and a second triggering device 666). During the rotation of the coil disk 603, its triggering devices can trigger the position detection component 664, thereby allowing the control device 400 to know the rotational position of the coil disk 603. For example, the position detection component 664 includes an optocoupler sensor, and the triggering device can be triggered by blocking the light emitted by the optocoupler sensor. Figure 13 and Figure 14 This shows the coil disk 603 relative to Figure 12 The position of the turntable 603 before and after rotation. The control device 400 can use the rotation position of the coil disk 603 when the trigger position detection component 664 is triggered as a reference position, and combine this with the output angle of the stepper motor 613 to determine the rotation angle of the coil disk 603. When the circumferential interval angle between the first trigger device 665 and the second trigger device 666 is 360 / N degrees, the turntable 603 can be controlled to be in one of the two trigger positions (respectively...). Figure 13 and Figure 14 It rotates back and forth between the positions mentioned.

[0238] Other embodiments of this application are described below. The same designs in each embodiment will not be repeated; only the differences between the embodiments will be highlighted.

[0239] First, in the second embodiment, the formation method of the non-uniformly distributed magnetic field along the circumferential direction of the electromagnetic heating module 600A is different. For example... Figure 15 and Figure 16As shown, the electromagnetic heating module 600A uses a coil 606 coaxial with itself to generate an alternating magnetic field. Simultaneously, a magnetic diaphragm with circumferentially arranged magnetic perforations makes this alternating magnetic field non-uniform; the magnetic field strength is high at the magnetic perforations and low at the non-magnetic areas. The electromagnetic heating module 600A is designed to rotate the magnetic diaphragm, thereby achieving a rotation of the magnetic field relative to the cooking container 300.

[0240] For example, coil 606 is concentrically arranged with coil holder 680 on coil holder 680, and the winding center of coil 606 and the central axis P4 of coil holder 680 are both the central axis P1 of the electromagnetic heating module. Coil 606 is, for example, arranged on the lower surface of coil holder 680. Electromagnetic heating module 600A also includes turntable 690. Turntable 690 is coaxial with coil holder 680. Turntable 690 is located between coil holder 680 and cooking container 300. Turntable 690 includes plate body 693. Plate body 693 is connected to mounting bracket 610 and is rotatable relative to mounting bracket 610 about the central axis P3 of turntable 690. Turntable 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 in the first region 691 is different from the medium in the disk body 693, so that the magnetic field strength of the alternating magnetic field of the coil 606 in the first region 691 is different from the magnetic field strength in the second region 692.

[0241] For example, the turntable 690, or the plate body 693, is made of a first material, such as a metal with a magnetic permeability of less than or equal to 10 B / H. Therefore, the turntable 690 forms a magnetically isolated disk that allows almost no magnetic field lines to pass through. The first region 691 is constructed as an opening with a certain area, allowing magnetic field lines to pass through, i.e., a magnetic perforation hole. The material of the second region 692 is the same as that of the plate body 693. Consequently, the alternating magnetic field in the first region 691 has more magnetic field lines than in the second region 692, making the magnetic field strength in the first region 691 greater than that in the second region 692. A strong magnetic region is formed in the first region 691, and a weak magnetic region in the second region 692. The cooking appliance 100 is constructed, for example, such that the turntable 690 can rotate around axis P1, thereby causing the alternating magnetic field to rotate around the cooking container 300.

[0242] The medium at region 691 is air, which is a different medium from the material of disk body 693. Alternatively, it can be understood that region 691 has no medium, and the absence of a medium is different from the presence of a medium.

[0243] In the second embodiment, a coil frame 680 is added to the shaft system. A turntable 690 and a mounting bracket 610 are located on opposite sides of the coil frame 680 along its axial direction. The coil frame 680 is connected to the mounting bracket 610 to maintain a constant relative position. To achieve this, the mounting bracket cylindrical portion 645 is designed as a multi-layered sleeve, for example, comprising, from the outside to the inside in the radial direction, a first cylindrical portion 661, a second cylindrical portion 662, and a third cylindrical portion 663. The three cylindrical portions extend from the same plane in the same direction. The turntable cylindrical portion 635 is located between the third cylindrical portion 663 and the second cylindrical portion 662, and a rotary joint structure 604 connects the second cylindrical portion 662 and the turntable cylindrical portion 635. That is, the turntable cylindrical portion 635 is located within the second cylindrical portion 662.

[0244] The connecting part 652 of the blocking structure 602 is connected to the third cylindrical part 663 of the mounting bracket.

[0245] A cable reel cylindrical portion 685 is provided approximately at the center of the cable reel frame 680, extending along the axial direction of the turntable 690 toward the mounting frame 610. The cable reel cylindrical portion 685 is located on the outer periphery of the turntable cylindrical portion 635. The cable reel cylindrical portion 685 is connected to the third cylindrical portion 663 of the mounting frame (e.g., by snap-fit, screw connection, etc.).

[0246] The first gear 609 is fitted around the outer periphery of the turntable cylindrical portion 635. Simultaneously, the mounting bracket third cylindrical portion 663 and the wire coil holder cylindrical portion 685 are also located around the outer periphery of the turntable cylindrical portion 635. To allow the first gear 609 to engage with the second gear 611, the mounting bracket third cylindrical portion 663 has a mounting bracket notch 658, and the wire coil holder cylindrical portion 685 has a wire coil holder notch 688, exposing the first gear 609 through these two notches. Compared to the first embodiment, the diameter of the first gear 609 is significantly smaller.

[0247] exist Figure 17 In the third embodiment shown, the electromagnetic heating module 600B uses a coil 606 coaxial with itself to generate an alternating magnetic field. Simultaneously, a non-uniformly distributed magnetic medium along the circumference makes this alternating magnetic field non-uniform; the magnetic field strength is high in the medium with high permeability and low in the medium with low permeability. The electromagnetic heating module 600B is configured to rotate the magnetic medium, thereby achieving rotation of the magnetic field relative to the cooking container 300.

[0248] In this embodiment, compared to the second embodiment, the first region 691 is made of a different material than the body 693 of the turntable 690, while the second region 692 is entirely made of the same material as the body 693 of the turntable 690. This results in a difference in magnetic field strength between the alternating magnetic field generated by the coil 606 in the first region 691 and in the second region 692, thereby creating a non-uniformly distributed alternating magnetic field along the circumferential direction of the electromagnetic heating module 600. For example, a magnetic field convergent member 695 is provided in the first region 691, and the material of the magnetic field convergent member 695 is, for example, a metal with a permeability greater than or equal to 100 B / H. The body of the turntable 690 is made of, for example, a non-magnetic material or a metal with a permeability less than or equal to 10 B / H. Since the permeability of the second material is greater than that of the first material, the magnetic field lines of the alternating magnetic field are focused (converged) at the magnetic field line converging component 695, making the magnetic field strength at the first region 691 greater than that at the second region 692. A strong magnetic region is formed at the first region 691, and a weak magnetic region is formed at the second region 692.

[0249] A ventilation hole 696 can be installed at location 692 in the second area.

[0250] In the third embodiment, the cooking appliance 100 is configured such that the turntable 690 can rotate around the axis P1, while the cooking container 300 and the coil holder 680 do not rotate, thereby rotating the magnetic field and keeping the cooking container 300 stationary.

[0251] exist Figure 18 and Figure 19 In the fourth embodiment shown, compared to the third embodiment, the turntable 690 and the coil frame 680 of the electromagnetic heating module 600C have swapped positions, with the turntable 690 located between the coil frame 680 and the mounting bracket 610. The connection method between the turntable 690 and the mounting bracket 610 is closer to the connection method between the turntable 603 and the mounting bracket 610 in the first embodiment. The coil frame cylindrical portion 685 of the coil frame 680 is located in the turntable cylindrical portion 635 and connected to the mounting bracket cylindrical portion 645. The central portion of the coil frame 680 (including the coil frame cylindrical portion 685) can be configured to form a blocking structure 602; that is, the coil frame 680 includes the blocking structure 602, and the coil frame cylindrical portion 685 is the blocking structure cylindrical portion.

[0252] In the fourth embodiment, the cooking appliance 100 is configured such that the turntable 690 can rotate around the axis P1, while the cooking container 300 and the coil holder 680 do not rotate, thereby rotating the magnetic field and keeping the cooking container 300 stationary.

[0253] In the second, third, and fourth embodiments, the axial cross-sections of the coil holder 680 and the plate body 693 are generally parallel C-shaped structures to conform to the bottom shape of the cooking container 300. The coil 606 is disposed on the side of the coil holder 680 facing the mounting bracket 610, that is, on the outside of the C-shaped structure, which facilitates the wiring of the coil 606 and its connection with the control device 400.

[0254] In summary, the electromagnetic heating module 600 is constructed such that the alternating magnetic field has N strong magnetic regions and N weak magnetic regions alternately distributed along the circumferential direction of the electromagnetic heating module 600, wherein the magnetic field strength of the strong magnetic regions is greater than that of the weak magnetic regions. Preferably, the N strong magnetic regions and the N weak magnetic regions are equally spaced along the circumferential direction of the electromagnetic heating module 600. The electromagnetic heating cooking appliance 100 is constructed such that when the cooking container 300 is at least above the electromagnetic heating module 600, at least a portion of the electromagnetic heating module 600 can rotate around the cooking container 300. Considering the limited length of the cable, the range of the relative rotation angle is, for example, 360 / N degrees (±180 / N degrees), thereby ensuring that no part of the cooking container 300 is missed during heating, and that the cooking container 300 is heated comprehensively and evenly. In the illustrated embodiment, N = 3.

[0255] The relative rotation between the cooking container 300 and the magnetic field can occur when the first coil 606 is energized. That is, the magnetic field of the electromagnetic heating module rotates while simultaneously heating the cooking container 300, ensuring uniform heating and reducing the horizontal temperature difference between different parts of the cooking container 300 on the same horizontal plane. Alternatively, the relative rotation between the cooking container 300 and the magnetic field can occur alternately with the energization of the first coil 606; that is, rotation occurs without heating, and heating occurs without rotation. This reduces the vertical temperature difference on the same vertical plane at each circumferential position, achieving uniform heating in one revolution. Alternatively, the heating sequence and the rotation sequence can be controlled independently. In this application, regardless of whether rotation and heating occur simultaneously, uniform heating is achieved by changing the heating position through rotation.

[0256] The cooking process of the cooking appliance 100 includes, for example, a water absorption process, a boiling process, a maintaining boil process, a simmering process, and a heat preservation process. In the water absorption process, the ingredients fully absorb water to improve texture. In the boiling process, the temperature is heated to near boiling using high heat, and then maintained at a boil in the maintaining boil process to ensure the ingredients are basically cooked. The simmering process dries out any remaining free moisture, further cooking the ingredients. Finally, the heat preservation process keeps the food warm so that the user can enjoy hot food.

[0257] In each process, the electromagnetic heating module (specifically, electromagnetic coil 606), acting as a heating device, operates in a power-adjusting mode. During each power-adjusting cycle, the electromagnetic coil 606 is energized for a preset energizing time and de-energized for a preset de-energizing time; the sum of the preset energizing and de-energizing times constitutes the duration of one power-adjusting cycle. Due to different cooking objectives or effects, the average power of each process may differ; for example, the preset energizing time may vary between different processes. Furthermore, because the cooking cavity may have temperature requirements in each process, the power of the electromagnetic heating module in each process may not be constant (the preset energizing time may differ between different power-adjusting cycles within the same process), and it may not be constantly in operation (in this text, the electromagnetic heating module during a power-adjusting cycle is considered to be in operation).

[0258] According to this application, the electromagnetic heating module achieves an integrated modular design through a mounting bracket, and the design and machining precision of the mounting bracket ensures the accuracy of the rotational transmission.

[0259] The processes and steps described in all the preferred embodiments above are merely examples. Unless adverse effects occur, various processing operations can be performed in a different order than those described above. The order of steps in the above process can also be added, combined, or deleted according to actual needs.

[0260] In understanding the scope of this application, the term "comprising" and its derivatives, as used herein, are intended to be open-ended terms that specify the presence of a described feature, element, component, group, whole, and / or step, but do not exclude the presence of other undescribed features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "comprising," "having," and their derivatives.

[0261] The term "attached" or "joined" as used herein includes: a construction in which one element is directly fixed to another element by fixing it directly to another element; a construction in which one element is indirectly fixed to another element by fixing it to an intermediate member, which in turn is fixed to another element; and a construction in which one element is integral with another element, that is, one element is substantially part of another element. This definition also applies to words with similar meanings, such as "connect," "joint," "couple," "install," "adhere," "fix," and their derivatives. Finally, degree terms such as "substantially," "approximately," and "approximately" as used herein indicate the amount of deviation from which modifications to the terminology do not significantly alter the final result.

[0262] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0263] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application.

Claims

1. An electromagnetic heating module for an electromagnetic heating cooking appliance, characterized in that, Comprising: a mounting frame for detachably connecting to the electromagnetic heating cooking appliance; a turntable connected to the mounting frame, the turntable being configured to be rotatable relative to the mounting frame about a central axis of the turntable; and at least one coil for generating an alternating magnetic field upon energization, the electromagnetic heating module being configured such that a magnetic field intensity of the alternating magnetic field is non-uniformly distributed in a circumferential direction of the turntable, wherein rotation of the turntable relative to the mounting frame about the central axis of the turntable causes the alternating magnetic field to rotate relative to the mounting frame about the central axis of the turntable. Further comprising:

2. The electromagnetic heating module of claim 1, wherein, a driving device provided on the mounting frame for providing a driving force for rotating the turntable; and a transmission device connecting the turntable and the driving device.

3. The electromagnetic heating module according to claim 2, wherein the driving device comprises a motor; the transmission device comprises: a first gear coaxially connected to the turntable, and a second gear coaxially connected to an output shaft of the motor and meshing with the first gear.

4. The electromagnetic heating module according to claim 3, wherein the first gear and the second gear are non-metal gears; and / or the first gear and / or the second gear are configured with weight-reducing holes. a tooth number ratio of the second gear to the first gear is any one of 1:1, 1:2, 1:3 and 1:

4. Further comprising a magnetic shield covering the motor for shielding electromagnetic interference between the motor and the coil.

5. The electromagnetic heating module of claim 3, wherein, a substantially central portion of the turntable is provided with a turntable cylindrical portion protruding towards the mounting frame in an axial direction of the turntable, the mounting frame is provided with a mounting frame cylindrical portion protruding towards the turntable in the axial direction of the turntable, the turntable cylindrical portion and the mounting frame cylindrical portion are adapted and rotatably connected, such that the turntable cylindrical portion is rotatable relative to the mounting frame cylindrical portion about the central axis of the turntable.

6. The electromagnetic heating module of claim 3, wherein, one of the mounting frame cylindrical portion and the turntable cylindrical portion is at least partially located in the other of the mounting frame cylindrical portion and the turntable cylindrical portion, and the turntable cylindrical portion and the mounting frame cylindrical portion are connected through a revolute pair structure, wherein an axis of the revolute pair structure coincides with the central axis of the turntable.

7. The electromagnetic heating module of claim 1, wherein, 9. The electromagnetic heating module according to claim 8, wherein 8. The electromagnetic heating module of claim 7, wherein, the revolute pair structure is configured as a rolling revolute pair structure or a sliding revolute pair structure; and / or the revolute pair structure is made of a non-metal material. an outer peripheral surface of the one of the mounting frame cylindrical portion and the turntable cylindrical portion is provided with a first surface extending in a radial direction, an inner peripheral surface of the other of the mounting frame cylindrical portion and the turntable cylindrical portion is provided with a second surface extending in the radial direction, and the revolute pair structure is located between the first surface and the second surface. Further comprising a temperature sensor provided in the turntable cylindrical portion.

10. The electromagnetic heating module of claim 8, wherein, an inner peripheral surface of the mounting frame cylindrical portion is provided with a third surface extending in a radial direction, 11. The electromagnetic heating module of claim 8, wherein, ​ 12. The electromagnetic heating module of claim 11, wherein, ​ The electromagnetic heating module further comprises a spring between the temperature sensor and the third surface, The third surface is connected with a wire hole for passing the cable of the temperature sensor.

13. The electromagnetic heating module of claim 12, wherein, Further comprising a blocking structure, the blocking structure comprises: a blocking part configured as a blocking ring in a radial direction of the rotary disc, an outer diameter of the blocking ring is greater than an inner diameter of the rotary disc cylindrical part, and an inner diameter of the blocking ring is less than a maximum outer diameter of the temperature sensor; and a connecting part, one end of the connecting part is connected to a middle part of the blocking ring in the radial direction, the connecting part extends into the rotary disc cylindrical part along an axial direction of the rotary disc, and the other end of the connecting part is connected to the mounting frame.

14. The electromagnetic heating module of claim 13, wherein, The mounting frame cylindrical part is located in the rotary disc cylindrical part, and the connecting part is configured as a cylinder and is screw-connected to the mounting frame cylindrical part.

15. The electromagnetic heating module of claim 1, wherein, 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.

16. The electromagnetic heating module according to claim 15, wherein the coil is arranged on a side of the rotary disc facing the mounting frame; and / or an axial cross section of the rotary disc is configured as a C-shaped structure.

17. The electromagnetic heating module of claim 15, wherein, Further comprising at least one bobbin, the bobbin is arranged corresponding to the coil, the coil is arranged on the bobbin, and the bobbin is arranged on the rotary disc.

18. The electromagnetic heating module of claim 17, wherein, At least one magnetic conducting member is further arranged on the bobbin.

19. The electromagnetic heating module of claim 1, wherein, Further comprising a coil holder, the coil holder is coaxially arranged with the rotary disc, the coil is arranged on the coil holder, a winding center of the coil is located on a central axis of the coil holder, the rotary disc comprises: a disc body connected to the mounting frame, the disc body is rotatable relative to the mounting frame around a central axis of the rotary disc, and at least one first area and at least one second area arranged on the rotary disc, the first area and the second area are alternately arranged on the disc body along a circumferential direction of the rotary disc, a medium at the first area is different from a medium of the disc body, so that a magnetic field intensity of the alternating magnetic field at the first area is different from a magnetic field intensity at the second area.

20. The electromagnetic heating module of claim 19, wherein, The disc body is made of a metal material with a magnetic permeability less than or equal to 10 B / H, the first area comprises at least one opening for passing magnetic lines of the alternating magnetic field.

21. The electromagnetic heating module of claim 19, wherein, The disc body is made of a first material, the first area is provided with at least one magnetic line concentrating member, the magnetic line concentrating member comprises a second material different from the first material.

22. The electromagnetic heating module of claim 21, wherein, 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.

23. The electromagnetic heating module according to claim 19, wherein axial cross sections of the coil holder and the disc body are configured as substantially parallel C-shaped structures; and / or the coil is arranged on a side of the coil holder facing the mounting frame.

24. The electromagnetic heating module of claim 1, wherein, The mounting frame is provided with an opening for passing an enameled wire of the coil or a connecting cable thereof.

25. The electromagnetic heating module according to claim 24, wherein The side of the mounting frame away from the turntable is provided with a wire slot for accommodating the enameled wire or its connecting cable; and / or The side of the mounting frame away from the turntable is provided with a wire clamp for limiting the enameled wire or its connecting cable.

26. The electromagnetic heating module of any one of claims 1 to 25, wherein, Further comprising a retaining ring, the retaining ring comprising: an annular wall extending in the axial direction of the turntable and located at the outer periphery of the turntable, the annular wall being connected to the mounting frame; and an annular retaining rib extending along the inner peripheral surface of the annular wall, the annular retaining rib being located at the side of the turntable away from the mounting frame, in the projection of the electromagnetic heating module along the axial direction of the turntable, the annular retaining rib coincides with the outer peripheral edge of the turntable along the circumferential direction of the turntable.

27. The electromagnetic heating module of claim 26, wherein, The annular wall is used to be detachably connected to the cooking appliance.

28. An electromagnetic heating cooking appliance, characterized by, comprising: a receiving cavity; the electromagnetic heating module according to any one of claims 1 to 27 is arranged in the receiving cavity, wherein the mounting frame is detachably connected to the cavity wall of the receiving cavity; and a cooking container comprising a ferromagnetic material, used to be placed substantially coaxially in the magnetically inducible area of the coil.

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