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 comprises a mounting frame, a rotating disc, at least two coils and a protective cover. 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 arranged on the turntable and used for generating an alternating magnetic field after being electrified, the alternating magnetic field is used for heating the cooking container, and the winding center of the coil deviates from the central axis of the turntable, so that the position of the coil relative to the cooking container can be changed when the turntable rotates. The protective cover is arranged on the side, facing the cooking container, of the rotary disc, the whole protective cover is a downwards-concave disc-shaped piece, and the protective cover is provided with a protective cover peripheral part located on the periphery and a protective cover cylindrical part roughly located in the center. Wherein the periphery of the protective cover is connected with the cooker shell, and the cylindrical part of the protective cover is connected with the mounting frame. According to the application, the protective cover can protect the turntable and the coil, and can also prevent a user from contacting the rotating turntable.

Description

TECHNICAL FIELD

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

[0002] IH cooking appliances are household appliances that directly heat cookware through electromagnetic induction principle. Common IH cooking appliances include induction cooktops and electric rice cookers. In the prior art, in order to achieve the effect of three-dimensional heating of food materials during cooking and the effect of complex and strong convection heating, multiple independently controlled coils are arranged on the coil disc. The independently controlled coils at different positions are used to heat, so that the hot and cold regions generated in the pot are changeable in position, 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 container. 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 module to at least partially solve the above problems. SUMMARY

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

[0005] To at least partially solve the above problems, the first aspect of the present application provides an electromagnetic heating module for heating a cooking container of an electromagnetic heating cooking appliance, the electromagnetic heating cooking appliance comprising a pot body having a pot shell, the electromagnetic heating module comprising:

[0006] a mounting frame arranged in the pot body;

[0007] 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;

[0008] at least two coils arranged on the turntable, the coils being used to generate an alternating magnetic field after being energized, the alternating magnetic field being used to heat the cooking container, the winding center of the coil being offset from the central axis of the turntable, so that the position of the coil relative to the cooking container is changeable when the turntable rotates; and

[0009] A protective cover is arranged on the side of the rotating disc facing the cooking container, and the protective cover is a concave disc as a whole, the protective cover has a protective cover peripheral part located at the periphery and a protective cover cylindrical part located at the approximate center,

[0010] The protective cover peripheral part is connected with the pot shell, and the protective cover cylindrical part is connected with the mounting frame.

[0011] According to the present application, the electromagnetic heating module can realize the effect of multi-point heat source rotating heating through the rotation of the rotating disc, so that the convection direction of the food changes and the food is evenly heated, thereby improving the cooking quality. The protective cover can prevent the user from touching the rotating rotating disc. At the same time, the protective cover can prevent foreign matter from falling on the rotating disc or the coil, and also has a protective effect on the rotating disc and the coil.

[0012] Optionally, the protective cover and the mounting frame maintain a relative position unchanged; and / or

[0013] The protective cover peripheral part is further connected with the mounting frame through a fastener.

[0014] According to the present application, the protective cover does not rotate, thereby improving safety. The protective cover is connected with the mounting frame at the periphery and the center, so that the two are firmly connected.

[0015] Optionally, the mounting frame is in contact with the protective cover cylindrical part, and the mounting frame is used for detachably connecting to the electromagnetic heating cooking appliance; and / or

[0016] The axial cross-sectional shape of the protective cover is a C-shaped structure as a whole.

[0017] According to the present application, the rotation of the magnetic field can realize the effect of multi-point heat source rotating heating, which improves the cooking quality while increasing the complexity of the structure. The electromagnetic heating module as a whole can be installed in the cooking appliance by means of the mounting frame, so that the electromagnetic heating module can be pre-assembled as a whole first, and then installed in the cooking appliance. In this way, it can avoid installing scattered parts one by one, avoid being affected by the installation precision of the installation site parts, make the installation precision between the multiple parts of the electromagnetic heating module higher, and also facilitate assembly in the cooking appliance, ensure the normal work and cooking effect of the cooking appliance, and improve the user experience. The axial cross-section of the protective cover includes a C-shaped structure to adapt to the shape of the bottom of the cooking container, so that the alternating magnetic field can better act on the cooking container.

[0018] Optionally, a rotating disc cylindrical part is arranged at the approximate center of the rotating disc and protrudes towards the mounting frame in the axial direction of the rotating disc, the mounting frame is provided with a mounting frame cylindrical part protruding towards the rotating disc in the axial direction of the rotating disc, and the rotating disc cylindrical part and the mounting frame cylindrical part are adapted and rotatably connected.

[0019] According to the present application, the mounting frame and the turntable are connected in relative rotation through the matched sleeve.

[0020] Optionally, one of the mounting frame sleeve and the turntable sleeve is at least partially inserted into the other one of the mounting frame sleeve and the turntable sleeve; and / or

[0021] The turntable sleeve and the mounting frame sleeve are connected through a revolute pair structure, wherein the axis of the revolute pair structure coincides with the central axis of the turntable.

[0022] According to the present application, the mounting frame and the turntable are connected in relative rotation through the matched sleeve. The revolute pair structure enables the turntable to rotate stably.

[0023] Optionally, the mounting frame and the protective cover are respectively located on the two sides of the turntable in the axial direction; and / or

[0024] The substantially central part of the protective cover is provided with the protective cover sleeve protruding towards the mounting frame in the axial direction of the turntable, and the protective cover sleeve is at least partially located in the turntable sleeve.

[0025] According to the present application, the mounting frame and the protective cover constitute the shell of the electromagnetic heating module, and the two sandwich the turntable. The mounting frame, the turntable and the protective cover are connected in the central position through the sleeve, and the electromagnetic heating module is compact in structure.

[0026] Optionally, the electromagnetic heating module further comprises a temperature sensor, and the temperature sensor is arranged in the protective cover sleeve.

[0027] According to the present application, the electromagnetic heating module can monitor the heating temperature through the temperature sensor, and the temperature sensor does not rotate with the turntable.

[0028] Optionally, the inner peripheral surface of the mounting frame sleeve is provided with a third surface extending in the radial direction,

[0029] The electromagnetic heating module further comprises a spring, and the spring is located between the temperature sensor and the third surface; and / or the third surface is connected with a wire passing hole for passing the lead wire of the temperature sensor.

[0030] According to the present application, the spring enables the temperature sensor to be in close contact with the cooking container.

[0031] Optionally, the protective cover further comprises:

[0032] The protective cover body, in the axial projection of the electromagnetic heating module, completely covers the turntable, and the periphery of the protective cover body is located around the periphery of the protective cover body; and

[0033] A sensor through-hole is located approximately at the center of the protective cover body, and the inner diameter of the sensor through-hole is smaller than the maximum outer diameter of the temperature sensor.

[0034] The cylindrical part of the protective cover is connected to the protective cover body on the outer periphery of the sensor through hole.

[0035] According to this application, the protective cover can prevent the temperature sensor from slipping off.

[0036] Optionally, both the mounting bracket cylindrical portion and the protective cover cylindrical portion are located within the turntable cylindrical portion, and the protective cover cylindrical portion is screwed or snapped into the mounting bracket cylindrical portion.

[0037] According to this application, the electromagnetic heating module has a compact structure and is easy to assemble and disassemble.

[0038] Optionally, the outer peripheral edge of the protective cover is in contact with or close to the outer peripheral edge of the mounting bracket.

[0039] According to this application, the edge of the mounting bracket and the edge of the protective cover form an almost sealed connection structure, which can effectively prevent food or foreign objects from entering the interior of the electromagnetic heating module and ensure the normal operation of the electromagnetic heating module.

[0040] Optionally, the outer peripheral edge of the protective cover and the outer peripheral edge of the mounting bracket have matching concave and convex shapes on their contacting or close surfaces. The concave and convex directions of the concave and convex shapes are the axial direction of the turntable, and the concave and convex portions of the concave and convex shapes are arranged along the radial direction of the turntable.

[0041] According to this application, the concave-convex shape is equivalent to increasing the number of layers of the sidewalls of the outer shell of the electromagnetic heating module, and the intersecting multi-layered sidewalls are more conducive to achieving the tightness of the outer shell.

[0042] Optionally, the coil is disposed on the side of the turntable facing the mounting bracket; and / or

[0043] The turntable has a C-shaped cross-section.

[0044] 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.

[0045] Optionally, the mounting bracket is provided with an opening for the enameled wire of the coil or its connecting cable to pass through.

[0046] 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.

[0047] Optionally, 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

[0048] 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.

[0049] According to this application, cable trays and cable clips facilitate the guidance and fixation of cables, preventing cable tangling.

[0050] A second aspect of this application provides an electromagnetic heating cooking appliance, comprising:

[0051] The pot body includes a pot shell and a cooking container for holding food ingredients, the cooking container being made of a ferromagnetic material;

[0052] The electromagnetic heating module according to any one of the first aspects, wherein the mounting bracket is disposed in the pot body, and the periphery of the protective cover is connected to the pot shell; and

[0053] The cooking container is positioned substantially coaxially with the turntable within the magnetically inductive region of the coil.

[0054] According to this application, electromagnetic heating cooking appliances can achieve multi-point heat source rotation heating through the rotation of the turntable, which changes the convection direction of the food and ensures even heating, thereby improving cooking quality. The protective cover prevents users from touching the rotating turntable. Simultaneously, the protective cover prevents foreign objects from falling onto the turntable or coil, thus protecting both the turntable and the coil. Attached Figure Description

[0055] 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:

[0056] Figure 1 This is a side cross-sectional schematic diagram of an electromagnetic heating cooking appliance according to the first embodiment of this application;

[0057] Figure 2 for Figure 1 An exploded view of the electromagnetic heating cooking appliance shown, omitting the lid;

[0058] Figure 3 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0059] Figure 4 for Figure 2 A top-view 3D schematic diagram of the electromagnetic heating module in the middle;

[0060] Figure 5 for Figure 2 A bottom-view 3D schematic diagram of the electromagnetic heating module in the image;

[0061] Figure 6 for Figure 2 A top view of the electromagnetic heating module, omitting the protective cover and turntable;

[0062] Figure 7 for Figure 2 A bottom view of the electromagnetic heating module, omitting the mounting bracket;

[0063] Figure 8 for Figure 2 An exploded view of the electromagnetic heating module in the diagram;

[0064] Figure 9 for Figure 2 Another exploded view of the electromagnetic heating module, in which some components are assembled;

[0065] Figure 10 for Figure 2 Another top-view perspective of the electromagnetic heating module, showing the wiring structure;

[0066] 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;

[0067] Figure 12 for Figure 3 Enlarged view of a partial cross-section of part B;

[0068] Figure 13 for Figure 2 A cross-sectional exploded view of the electromagnetic heating module in the diagram;

[0069] Figure 14 for Figure 2 A three-dimensional schematic diagram of part of the electromagnetic heating module in the image;

[0070] Figure 15 for Figure 2 A three-dimensional schematic diagram of a portion of the electromagnetic heating module, in which the coil disk is relative to... Figure 14 The position in the middle was rotated counterclockwise by one angle;

[0071] Figure 16 for Figure 2 A three-dimensional schematic diagram of a portion of the electromagnetic heating module, in which the coil disk is relative to...Figure 14 The position in the middle was rotated clockwise by one angle.

[0072] Explanation of reference numerals in the attached figures:

[0073] 100: Cooking utensils

[0074] 200: Cover

[0075] 300: Cooking containers

[0076] 400: Control device

[0077] 401: Third connecting hole

[0078] 402: Fan

[0079] 500: Base

[0080] 501: Support Leg

[0081] 502: Base ventilation holes

[0082] 600: Electromagnetic heating module

[0083] 601: Protective shield

[0084] 602: Protective shield body

[0085] 603: Cable Reel

[0086] 604: Rotary joint structure

[0087] 605: Temperature sensor

[0088] 606: Electromagnetic coil

[0089] 607: Winding stand

[0090] 608: Magnetic Conductor

[0091] 609: First Gear

[0092] 610: Mounting bracket

[0093] 611: Second Gear

[0094] 612: Magnetic shield

[0095] 613: Electric motor

[0096] 614: First main cable

[0097] 615: Second main cable

[0098] 616: Screws

[0099] 617: Screws

[0100] 618: Screws

[0101] 619: Screws

[0102] 620: Line Card

[0103] 621: First cable trough

[0104] 622: Second cable tray

[0105] 623: Line card

[0106] 624: Line Card

[0107] 625: Motor cable

[0108] 626: Temperature sensor cable

[0109] 627: Circular retaining rib

[0110] 628: First connecting hole

[0111] 629: Second connecting hole

[0112] 630: Roller

[0113] 631: Spring

[0114] 632: Positioning slot

[0115] 635: Rotary cylindrical section

[0116] 636: Dominant Structure

[0117] 641: First Surface

[0118] 642: Second Surface

[0119] 643: Third Surface

[0120] 644: Cable guide hole

[0121] 645: Installation frame cylindrical part

[0122] 646: Connecting Ear

[0123] 647: Circular wall

[0124] 648: Mounting bracket heat dissipation holes

[0125] 651: Sensor via

[0126] 652: Cylindrical part of the protective cover

[0127] 653: First Card Connector

[0128] 654: First connecting part

[0129] 656: Second connecting part

[0130] 657: Second Card Connector

[0131] 659: Peripheral part of the protective cover

[0132] 664: Position Detection Component

[0133] 665: First triggering device

[0134] 666: Second triggering device

[0135] 667: Position detection component cable

[0136] 700: Claypot

[0137] 701: Medium plate

[0138] 702: Connecting Post

[0139] 703: Inner cylinder

[0140] 705: Receiving cavity

[0141] 707: Outer shell

[0142] P1: Central axis of electromagnetic heating module

[0143] P2: Central axis of the cooking container

[0144] P3: Turntable center axis Detailed Implementation

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] This application provides an electromagnetic heating module and an electromagnetic heating cooking appliance having the electromagnetic heating module.

[0152] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings.

[0153] 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.

[0154] The pot body 700 includes, for example, an outer shell 707, a middle plate 701, and an inner cylinder 703. 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 middle plate 701 and extends vertically. The base 500 is connected, for example, to the outer shell 707 and / or the middle plate 701. More broadly, the outer 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 outer 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 outer shell 707 allows the user to install 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 leakage 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. The inner cylinder 703 can be understood as the inner shell of the pot body. The outer shell 707, the middle plate 701, and the inner cylinder 703 are connected as a whole, which can be understood as the shell of the pot body 700 (pot shell).

[0155] like Figure 2 As shown, the base 500 is provided with multiple heat dissipation holes 502 for heat dissipation. The lower surface of the base 500 is provided with multiple support legs 501 to lift the heat dissipation holes 502 off the surface of the support platform such as the desktop.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] Specifically, such as Figures 2 to 11 As shown, the electromagnetic heating module 600 includes, for example, a protective cover 601, 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 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 unit connects coil disk 603 and drive unit, thereby driving coil disk 603 to rotate via transmission unit. Protective cover 601 is used to cover turntable 603. For example, protective cover 601 and mounting bracket 610 are respectively disposed at opposite ends of the electromagnetic heating module 600 along the axial direction, sandwiching turntable 603 between them.

[0160] 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.

[0161] The upper surface of the coil disk 603 is provided with, for example, a visible structure 636. The position of the visible structure 636 corresponds to the position of the coil 606. The appearance of the visible structure 636 is significantly different from the other parts of the coil disk 603, so as to allow the user to have a perceptual understanding of the location of multiple heat sources. The visible structure 636 is constructed, for example, to simulate the texture of the coil to simulate the coil 606.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] like Figure 3 As shown, the turntable 603 has an overall C-shaped cross-sectional shape, 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 located on the side of the turntable 603 facing the mounting bracket 610 to avoid exposure in the receiving cavity 705. The coil 606 is located on the outside of the C-shaped structure. In this application, the C-shaped structure refers to the overall shape of the English letter "C". Both the turntable 603 and the protective cover 601 are bowl-shaped (plate-shaped) with concave recesses forming a receiving space.

[0168] Optionally, such as Figure 8 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.

[0169] Optionally, such as Figure 3 and Figure 8As 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.

[0170] Optionally, such as 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.

[0171] 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 603. Through stepper motor rotation control and transmission device transmission, the coil 603 can achieve forward and reverse rotation, intermittent rotation, and stepless speed regulation. The motor 613 is mounted on the mounting bracket 610, for example, by screws 618. Preferably, the electromagnetic heating module 600 also 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 functions, such as aluminum or copper.

[0172] Optionally, such as 3 and Figures 6 to 8As 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.

[0173] 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.

[0174] 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.

[0175] Optionally, such as Figure 3 , Figure 8 Erhe Figure 11 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.

[0176] 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 (inserted) 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 and affecting the fit between the mechanisms.

[0177] 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 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.

[0178] 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.

[0179] Preferably, such as Figure 3 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.

[0180] Optionally, such as Figure 3 , Figure 4 , Figure 8 and Figure 9As 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.

[0181] 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.

[0182] like Figure 10 As shown, the mounting bracket 610 is provided with multiple mounting bracket heat dissipation holes 648 for heat dissipation.

[0183] like Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown, a protective cover 601 is disposed on the side of the turntable 603 facing the cooking container 300. The protective cover 601 can be disposed adjacent to the turntable 603. When the axial direction of the electromagnetic heating module 600 is vertical, the protective cover 601 is positioned above the turntable 603. In the axial projection of the electromagnetic heating module, the protective cover 601 completely covers the turntable 603. Furthermore, the protective cover 601 maintains a constant relative position with the mounting bracket 610. That is, the protective cover 601 does not rotate with the turntable 603 but remains stationary. Thus, the protective cover 601 completely covers the turntable 603, preventing the user from touching it and avoiding accidental rotation of the turntable 603 that could injure the user. Furthermore, the protective cover 601 also prevents foreign objects from falling onto the turntable 603, thus protecting the turntable 603.

[0184] The protective cover 601 is, for example, in contact with the mounting bracket 610, so that their relative positions can remain unchanged. Figure 3 and Figure 13As shown, the protective cover 601 includes, for example, a protective cover body 602 and a protective cover cylindrical portion 652. The protective cover body 602 is generally disc-shaped, with a C-shaped axial cross-section to accommodate the bottom shape of the cooking container 300. In the axial projection of the electromagnetic heating module 600, the protective cover body 602 completely covers the turntable 603. The peripheral portion of the protective cover body 602 is the protective cover periphery 659, which is used to connect to the inner cylinder 703 or the middle plate 701. The protective cover cylindrical portion 652 is connected to approximately the central portion of the protective cover body 602 and protrudes toward the mounting bracket 610 along the axial direction of the turntable 603. The protective cover cylindrical portion 652 is at least partially located within the turntable cylindrical portion 635. The protective cover cylindrical portion 652 is connected to the mounting bracket 610.

[0185] For example, the mounting bracket cylindrical portion 645 is located within the turntable cylindrical portion 635, and the protective cover cylindrical portion 652 is connected to the mounting bracket cylindrical portion 645. The protective cover cylindrical portion 652 can be screwed or snapped into the mounting bracket cylindrical portion 645. For example, in the illustrated embodiment, a first snap-fit ​​portion 653 is provided at the lower end of the protective cover cylindrical portion 652. A second snap-fit ​​portion 657 is provided at the upper end of the mounting bracket cylindrical portion 645. The first snap-fit ​​portion 653 and the second snap-fit ​​portion 657 are each provided with a plurality of corresponding snap-fit ​​structures. When connecting, the protective cover 601 is rotated, for example, by a small clockwise angle, causing the snap-fit ​​protrusion of the second snap-fit ​​portion 657 to rotate into the slot of the first snap-fit ​​portion 653 to achieve snap-fit; when disassembling, the protective cover 601 is rotated, for example, by a small counterclockwise angle to separate the snap-fit ​​structures. The protective cover 601 and the mounting bracket 610 are easily assembled by snap-fit ​​or threaded connection, and are also easy to disassemble during maintenance.

[0186] A sensor through-hole 651 is provided approximately at the center of the protective cover body 602, and the cylindrical portion 652 of the protective cover is connected to the protective cover body 602 on the outer periphery of the sensor through-hole 651. A temperature sensor 605 is disposed within the cylindrical portion 652 of the protective cover. The inner diameter of the sensor through-hole 651 is smaller than the maximum outer diameter of the temperature sensor 605. Therefore, the temperature sensing component at the upper end of the temperature sensor 605 can extend out of the sensor through-hole 651 and contact the cooking container 300 (see...). Figure 4 However, the temperature sensor 605 cannot be removed from the sensor through hole 651. After the protective cover 601 is fixed to the mounting bracket 610, it can not only prevent the temperature sensor 605 from falling off, but also prevent the turntable 603 from moving away from the mounting bracket 610, and limit the turntable 603 axially between the protective cover 601 and the mounting bracket 610.

[0187] like Figure 12As shown, the periphery 659 of the protective cover 601 can contact or be close to the mounting bracket 610 at its edge, for example, the gap between them is no more than 1 mm. For example, the outer peripheral edge of the protective cover 601 is provided with a first connecting portion 654. The outer peripheral edge of the mounting bracket 610 is provided with a second connecting portion 656. The first connecting portion 654 and the second connecting portion 656 are adapted in shape, for example, having a matching concave-convex shape. The concave-convex direction of this shape is the axial direction of the electromagnetic heating module 600, and the concave and convex portions of this shape are arranged along the radial direction of the electromagnetic heating module 600. Thus, when the first connecting portion 654 and the second connecting portion 656 contact each other, the two concave-convex surfaces fit together, with almost no gap between them. Through the contact connection of the first connecting portion 654 and the second connecting portion 656, the edge of the mounting bracket 610 and the edge of the protective cover 601 form a sealed connection structure, which can effectively prevent food or foreign objects from entering the interior of the electromagnetic heating module 600, ensuring the normal operation of the electromagnetic heating module 600. The matching concave and convex shapes of the contact surfaces can serve to limit each other.

[0188] The mounting bracket 610 and the protective cover 601 together constitute the housing of the electromagnetic heating module 600. At least one of the mounting bracket 610 and the protective cover 601 is detachably connected to the cavity wall protective cover 601 of the receiving cavity 705, such as the inner cylinder 703 or the base 500. For example, the protective cover 601 can be detachably connected to the inner cylinder 703 of the pot body 700. Figure 2 , Figure 5 and Figure 11 As 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 protective cover 601's protective cover periphery 659 has a corresponding first connecting hole 628. The connecting posts 702 are connected to the first connecting hole 628 by screws, thus connecting the protective cover 601 to the middle plate 701 of the pot shell. The outer side of the protective cover 601 also has a second connecting hole 629, and the edge of the mounting bracket 610 has corresponding connecting ears 626. The protective cover 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 protective cover 601 is detachably connected to the cavity wall of the receiving cavity 705. The mounting bracket 610 is detachably connected to the protective cover 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.

[0189] The matching concave and convex shapes of the first connecting part 654 on the outer periphery of the protective cover 601 and the second connecting part 656 on the outer periphery of the mounting bracket 610 are arranged along the radial direction of the electromagnetic heating module 600, which is equivalent to increasing the number of sidewalls of the outer shell of the electromagnetic heating module 600. The intersecting multi-layer sidewalls are more conducive to achieving the tightness of the outer shell.

[0190] The outer peripheral edge of the protective cover 601 can also contact or be close to the lower end of the inner cylinder 603. The first connecting portion 654 can be a downwardly extending protruding edge at the outer peripheral edge of the protective cover 601. Similarly, the protective cover 601 can contact or be close to the inner cylinder 603 through an upwardly extending protruding edge at its outer peripheral edge.

[0191] Optionally, the cooking appliance 100 also includes a control device 400. The control device 400 controls the operation of all 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.

[0192] The control device 400 is presented in the form of a circuit board, such as a power board directly connected to mains power. An MCU chip, for example, is mounted on the circuit board. A fan 402 for heat dissipation is also mounted on the circuit board.

[0193] 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.

[0194] like Figure 5 and Figure 10As 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 cable groove 621 and a second cable groove 622. The first cable groove 621 is used to limit the first main cable 614, and the second cable groove 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.

[0195] One end of the first main cable 614 and the second main cable 615 is connected to the enameled wire of the coil 606, for example, via a screw 617. The other end of the first main cable 614 and the second main cable 615 is connected to the circuit board of the control device 400, for example, via a screw 616.

[0196] 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.

[0197] 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.

[0198] like Figure 11 and Figures 14 to 16As 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 15 and Figure 16 This shows the coil disk 603 relative to Figure 14 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 15 and Figure 16 It rotates back and forth between the positions mentioned.

[0199] 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.

[0200] 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.

[0201] 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).

[0202] According to this application, the electromagnetic heating module uses a protective cover to shield the turntable that rotates the magnetic field, thereby improving the safety of electromagnetic cooking appliances.

[0203] 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.

[0204] 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.

[0205] 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.

[0206] 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.

[0207] 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 heating a cooking vessel of an electromagnetic heating cooking appliance, the electromagnetic heating cooking appliance comprising a pot body having a pot shell, characterized in that, The electromagnetic heating module comprises: a mounting frame arranged in the pot body; a rotating disc connected to the mounting frame, the rotating disc being configured to be rotatable relative to the mounting frame about a central axis of the rotating disc; at least two coils arranged on the rotating disc, the coils being configured to generate an alternating magnetic field for heating the cooking container when energized, the winding center of the coils being offset from the central axis of the rotating disc, so that the position of the coils relative to the cooking container is changeable when the rotating disc rotates; and a protective cover arranged on the side of the rotating disc facing the cooking container, the protective cover being a concave disc as a whole, the protective cover having a peripheral protective cover portion and a substantially central protective cover cylindrical portion, wherein the protective cover portion is connected to the pot shell, and the protective cover cylindrical portion is connected to the mounting frame.

2. The electromagnetic heating module according to claim 1, wherein the protective cover and the mounting frame maintain a relative position unchanged; and / or the protective cover portion is further connected to the mounting frame by fasteners.

3. The electromagnetic heating module according to claim 1, wherein the mounting frame is in contact with the protective cover cylindrical portion, and the mounting frame is configured to be detachably connected to the electromagnetic heating cooking appliance; and / or the protective cover has a C-shaped structure as a whole in axial cross section.

4. The electromagnetic heating module of claim 1, wherein, A substantially central portion of the rotating disc is provided with a rotating disc cylindrical portion protruding towards the mounting frame in the axial direction of the rotating disc, the mounting frame is provided with a mounting frame cylindrical portion protruding towards the rotating disc in the axial direction of the rotating disc, and the rotating disc cylindrical portion and the mounting frame cylindrical portion are adapted and rotatably connected.

5. The electromagnetic heating module according to claim 4, wherein one of the mounting frame cylindrical portion and the rotating disc cylindrical portion is at least partially inserted into the other one of the mounting frame cylindrical portion and the rotating disc cylindrical portion; and / or the rotating disc cylindrical portion and the mounting frame cylindrical portion are connected by a revolute pair structure, wherein the axis of the revolute pair structure coincides with the central axis of the rotating disc.

6. The electromagnetic heating module according to claim 4, wherein the mounting frame and the protective cover are respectively located on both sides of the rotating disc in the axial direction; and / or a substantially central portion of the protective cover is provided with the protective cover cylindrical portion protruding towards the mounting frame in the axial direction of the rotating disc, and the protective cover cylindrical portion is at least partially located in the rotating disc cylindrical portion.

7. The electromagnetic heating module of claim 6, wherein, Further comprising a temperature sensor arranged in the protective cover cylindrical portion.

8. The electromagnetic heating module of claim 7, wherein, An inner peripheral surface of the mounting frame cylindrical portion is provided with a third surface extending in the radial direction, the electromagnetic heating module further comprises a spring located between the temperature sensor and the third surface; and / or the third surface is connected with a wire passing hole for passing the wire of the temperature sensor.

9. The electromagnetic heating module of claim 7, wherein, The protective cover further comprises: A shield body completely covers the turntable in a projection of the electromagnetic heating module in an axial direction, and a shield peripheral portion is located at a periphery of the shield body; and A sensor via hole is arranged at a substantially central position of the shield body, and an inner diameter of the sensor via hole is smaller than a maximum outer diameter of the temperature sensor, The shield cylindrical portion is connected to the shield body at an outer peripheral side of the sensor via hole.

10. The electromagnetic heating module of claim 4, wherein, Both the mounting bracket cylindrical portion and the shield cylindrical portion are located in the turntable cylindrical portion, and the shield cylindrical portion is screw-connected or clamped to the mounting bracket cylindrical portion.

11. The electromagnetic heating module of claim 1, wherein, An outer peripheral edge of the shield is in contact with or close to an outer peripheral edge of the mounting bracket.

12. The electromagnetic heating module of claim 11, wherein, Surfaces of the outer peripheral edge of the shield and the outer peripheral edge of the mounting bracket, which are in contact or close to each other, are provided with matching concave-convex shapes, the concave-convex shapes are arranged in an axial direction of the turntable, and concave portions and convex portions of the concave-convex shapes are arranged in a radial direction of the turntable.

13. The electromagnetic heating module according to claim 1, wherein The coil is arranged on a side of the turntable facing the mounting bracket; and / or An axial cross-sectional shape of the turntable is in a C-shaped structure as a whole.

14. The electromagnetic heating module of any one of claims 1 to 13, wherein, The mounting bracket is provided with an opening hole for the enameled wire of the coil or a connecting cable thereof to pass through.

15. The electromagnetic heating module according to claim 14, wherein A wire slot is arranged on a side of the mounting bracket facing away from the turntable, for accommodating the enameled wire or the connecting cable thereof; and / or A wire clamp is arranged on the side of the mounting bracket facing away from the turntable, for limiting the enameled wire or the connecting cable thereof.

16. An electromagnetic heating cooking appliance, characterized by, Comprise: A pot body comprising a pot shell and a cooking container for containing food materials, the cooking container comprising a ferromagnetic material; And The electromagnetic heating module according to any one of claims 1 to 15, wherein the mounting bracket is arranged in the pot body, and the shield peripheral portion is connected to the pot shell, The cooking container is arranged in the coil in a magnetically inductive region in a substantially coaxial manner with the turntable.

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