Wire coil device and electromagnetic heating cooking utensil

Abstract

The invention discloses a wire coil device and an electromagnetic heating cooking utensil. The wire coil device comprises a supporting piece and a wire coil assembly. The wire coil assembly is connected to the support and has a wire coil assembly central axis. The wire coil assembly comprises a disc-shaped winding wire and a rotating disc. The disc-shaped winding wire is used for generating an alternating magnetic field after being electrified and is wound around the central axis of the wire coil assembly. The wire coil assembly disc-shaped winding rotary disc comprises a disc body, and the disc body is connected to the supporting piece. The disc body is alternately provided with at least one first area and at least one second area along the circumferential direction of the disc assembly, and a medium in the first area is different from that in the disc body, so that the magnetic field intensity of the alternating magnetic field in the first area is different from that in the second area. The rotating disc can rotate around the central axis of the wire coil assembly relative to the disc-shaped winding wire. According to the application, the non-uniform magnetic field is set and the magnetic field is rotated, so that the heated position of the cooking space can be rotated.

Description

Technical Field

[0001] The present application relates to the technical field of cooking utensils, and in particular to a wire reel device for electromagnetic heating cooking utensils and an electromagnetic heating cooking utensils using the wire reel device. Background Art

[0002] In order to achieve the three-dimensional heating effect of ingredients during cooking and the complex and intense convection heating effect, the existing IH rice cooker has multiple independently controlled coil windings on the coil rack. Through the independent control and heating of the coil windings in different parts, the hot and cold areas in the pot can be variable, that is, different convection directions of the hot and cold areas can be formed in different cooking time periods, so that more than one heat convection tumbling state can be generated, thereby achieving the complex and intense convection heating effect inside the inner pot. Due to the provision of multiple independently heated coil windings, the coil winding arrangement is difficult, the winding method is complex, and the winding process is required to be high, and the magnetic strip and magnetic strip frame structure process is complex, the assembly is difficult, and the overall cost is high. In addition, in order to achieve the complex and intense convection heating effect, multiple groups of independently controlled coil windings are provided, that is, multiple groups of independent power supply control modules need to be provided, so part of the electric control cost is also increased. Moreover, the heating position of the coil winding is fixed, the heating area is limited, and the rice effect is not ideal.

[0003] Therefore, a wire reel device and an electromagnetic heating cooking appliance are needed to at least partially solve the above problems. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the present application provides a wire reel device for electromagnetic heating cooking utensils in a first aspect, comprising:

[0006] Supports; and

[0007] A wire drum assembly is connected to the support member, the wire drum assembly has a wire drum assembly central axis, and the wire drum assembly includes:

[0008] A coiled wire is disposed on the coil assembly and coiled around the central axis of the coil assembly to form a resonant inductor of an electromagnetic heating resonant circuit to generate an alternating magnetic field required for electromagnetic heating after power is supplied, and

[0009] A turntable, the turntable comprising:

[0010] a disc body connected to the support member, and

[0011] At least one first area and at least one second area are arranged on the rotating disk, the first area and the second area are alternately arranged on the disk body along the circumferential direction of the wire disk assembly, and the medium at the first area is different from the medium of the disk body, so that the magnetic field strength of the alternating magnetic field at the first area is different from the magnetic field strength at the second area;

[0012] The wire drum device is constructed so that the turntable can rotate relative to the disc-shaped winding wire around the central axis of the wire drum assembly.

[0013] According to the present application, the wire reel device can construct a magnetic field with uneven intensity distribution along the circumferential direction, and can rotate the magnetic field, so that the heated part in the cooking space rotates, and the food in the cooking space is heated evenly through the rotation.

[0014] Optionally, the cable drum assembly further comprises a cable drum frame connected to the support member, the cable drum frame being wound on the cable drum frame around a central axis of the cable drum assembly, wherein the turntable is configured to be rotatable relative to the cable drum frame around the central axis of the cable drum assembly.

[0015] According to the present application, the turntable rotates relative to the bobbin, thereby forming a rotating magnetic field.

[0016] Optionally, the coiled wire is coiled around the central axis of the wire drum assembly on a surface of the wire drum frame facing away from the drum body.

[0017] According to the present application, the coiled wire can be easily routed.

[0018] Optionally, a wire drum through hole extending in the axial direction of the wire drum is provided in the central portion of the wire drum rack, and the support member is adapted to the wire drum through hole so that the support member can rotate relative to the wire drum rack around the central axis PA of the wire drum assembly, thereby driving the turntable to rotate.

[0019] Furthermore, the support member is arranged in the wire drum through hole, and the wire drum device also includes a rotating auxiliary structure, and the wire drum through hole and the support member are connected through the rotating auxiliary structure, wherein the axis of the rotating auxiliary structure coincides with the central axis of the wire drum assembly.

[0020] According to the present application, the support member can stably rotate relative to the cable drum.

[0021] Optionally, the support member has a first support member end and a second support member end which are arranged oppositely along the axial direction of the cable drum assembly, wherein the drum body is connected to the first support member end, and the cable drum rack is connected to the second support member end.

[0022] According to the present application, the rotation of the turntable relative to the wire bobbin is simple to implement.

[0023] Optionally,

[0024] The wire drum device further comprises a second blocking member, which is disposed at the second end of the support member, and the second blocking member comprises a second blocking portion extending outwardly in the radial direction of the wire drum assembly.

[0025] The outer peripheral surface of the support member includes a blocking surface extending toward the side wall of the wire drum through hole in the radial direction of the wire drum assembly, and / or the inner peripheral surface of the wire drum through hole includes a blocking surface extending toward the support member in the radial direction of the wire drum assembly.

[0026] The wire drum device is configured such that the rotary auxiliary structure is constrained between the blocking surface and the second blocking portion along the axial direction of the wire drum assembly.

[0027] According to the present application, the pivoting secondary structure is stably connected to the outer periphery of the support.

[0028] Optionally, part of the second blocking portion is connected between the rotary auxiliary structure and the side wall of the wire drum through hole along the radial direction of the wire drum assembly.

[0029] Furthermore, a second transmission wheel is provided between the rotary substructure and the blocking surface, and the second transmission wheel is connected to the support member, and is used to drive the support member to rotate relative to the wire coiling frame around the central axis of the wire coil assembly under the drive of the driving device.

[0030] According to the present application, a space for installing a transmission wheel is reserved between the rotary auxiliary structure and the side wall of the through hole of the wire drum.

[0031] Optionally,

[0032] The second blocking member and / or the side wall of the wire drum through hole is provided with an opening for exposing the second transmission wheel; and / or

[0033] The second transmission wheel is made of non-metallic material.

[0034] According to the present application, the transmission wheel can be connected to the driving device through the opening of the side wall of the second blocking member and / or the through hole of the wire coil. The second transmission wheel is made of non-metallic material, so as not to affect the magnetic field of the coil winding.

[0035] Optionally, the second blocking member is snap-fitted or screw-fitted to the cylindrical portion.

[0036] According to the present application, the connection method between the second blocking member and the cylindrical portion is flexible.

[0037] Optionally, the wire drum device also includes a first blocking member, which is arranged at the first end of the support member, and the first blocking member includes a first blocking portion extending outward in the radial direction of the wire drum assembly, for preventing the support member from moving in the axial direction of the wire drum assembly toward a direction away from the second end of the support member.

[0038] According to the present application, the support is limited in the axial direction.

[0039] Optionally, the support member is internally configured with a receiving space penetrating the support member along the axial direction of the wire drum assembly.

[0040] The first blocking member further includes a first connecting portion connected to the first blocking portion, and the second blocking member further includes a second connecting portion connected to the second blocking portion.

[0041] The first connection portion and the second connection portion are connected to each other in the accommodation space.

[0042] According to the present application, the support member is limited in the axial direction between the first blocking portion and the second blocking portion, and is limited in the radial direction between the structure formed by the first connecting portion and the second connecting portion and the cylindrical portion.

[0043] Optionally,

[0044] The rotary auxiliary structure is made of non-metallic material; and / or

[0045] The rotary auxiliary structure is configured as a rolling bearing or a sliding sleeve.

[0046] According to the present application, the rotary auxiliary structure can be flexibly configured. The rotary auxiliary structure is made of non-metallic material so as not to interfere with the magnetic field of the disc winding.

[0047] Optionally, the axial cross-section of the cable reel and the reel body is a C-shaped structure, and the reel body is located on the inner side of the C-shaped structure of the cable reel.

[0048] According to the present application, the wire coiling rack is constructed in a C-shape, so that the coiled wire can surround the bottom and at least part of the side of the cooking container.

[0049] Optionally, the wire drum assembly is constructed so that the alternating magnetic field has N strong magnetic regions and N weak magnetic regions alternatingly distributed along the circumferential direction of the wire drum assembly, wherein the magnetic field strength of the strong magnetic region is greater than the magnetic field strength of the weak magnetic region, the N strong magnetic regions are equally spaced along the circumferential direction of the wire drum assembly, and the N weak magnetic regions are equally spaced along the circumferential direction of the wire drum assembly, and N is an integer greater than or equal to 1.

[0050] According to the present application, the non-uniform magnetic field has a radially symmetric structure, which is easy to control.

[0051] Optionally, the disk body is made of a metal material with a magnetic permeability less than or equal to 10 B / H, and the first region includes at least one opening for allowing magnetic lines of force of the alternating magnetic field to pass through.

[0052] According to the present application, the first region of the disk body allows magnetic lines of force to pass through, while the second region hardly allows magnetic lines of force to pass through, thereby forming a non-uniformly distributed magnetic field along the circumferential direction of the disk body.

[0053] Optionally,

[0054] The distance between the disc body and the disc winding is 3.5 mm to 10 mm; and / or

[0055] The disc body has a thickness of 0.4 mm to 2 mm.

[0056] According to the present application, the distance between the disc body and the disc-shaped winding can be flexibly set. The thickness of the disc body can be flexibly set.

[0057] Optionally,

[0058] The area of ​​a single opening is 28 mm 2 Up to 5024mm 2 ; and / or

[0059] The area of ​​all the openings accounts for 10% to 70% of the area of ​​the disk body.

[0060] According to the present application, the openings in the first region can be flexibly arranged.

[0061] Optionally, the disk body is made of a first material, the first region is provided with at least one magnetic line of force gathering member, and the magnetic line of force gathering member comprises a second material different from the first material.

[0062] Furthermore, 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.

[0063] According to the present application, by providing a material different from that of the disk body in the first region, the magnetic permeability of the first region is different from that of the second region, thereby forming an inhomogeneous magnetic field.

[0064] Optionally,

[0065] The area of ​​a single magnetic field gathering piece is 28mm 2 Up to 5024mm 2 ; and / or

[0066] The area of ​​all the magnetic flux converging members accounts for 10% to 70% of the area of ​​the disk body.

[0067] According to the present application, the magnetic line gathering member can be flexibly arranged.

[0068] Optionally, the magnetic line of force gathering member is embedded in the disk body, and / or the magnetic line of force gathering member is attached to the surface of the disk body.

[0069] According to the present application, the way in which the magnetic flux converging member is connected to the disk body is flexible.

[0070] Optionally,

[0071] The distance between the magnetic field line gathering member and the disc winding is 3.5 mm to 15 mm; and / or

[0072] The thickness of the magnetic line gathering member is 2 mm to 10 mm.

[0073] According to the present application, the distance between the magnetic force line gathering member and the disc-shaped winding can be flexibly set. The thickness of the magnetic force line gathering member can be flexibly set.

[0074] Optionally, the second area is provided with at least one heat dissipation hole.

[0075] According to the present application, the cable drum device has good heat dissipation performance.

[0076] A second aspect of the present application provides an electromagnetic heating cooking appliance, comprising:

[0077] a receiving cavity; and

[0078] According to any one of the technical solutions of the first aspect, a wire reel device of a wire reel rack is provided, the wire reel device is located in the accommodating cavity, wherein the wire reel rack is connected to the cavity wall of the accommodating cavity;

[0079] a cooking container for holding food, the cooking container being detachably arranged on one side of the wire reel device from the wire reel device, the cooking container comprising a ferromagnetic material; and

[0080] A driving device is connected to the support member and is used to drive the support member to rotate relative to the wire coiling frame around the central axis of the wire coil assembly.

[0081] According to the present application, the wire reel device can construct a magnetic field with uneven intensity distribution in the circumferential direction, and the driving device can rotate the magnetic field, thereby rotating the heated part of the cooking container, so that the food in the cooking container is heated evenly through rotation.

[0082] Optionally, the driving device comprises:

[0083] a drive assembly for providing a driving force for rotating the support member relative to the cable drum; and

[0084] The transmission assembly is connected between the driving assembly and the supporting member and is used for transmitting the driving force to the supporting member.

[0085] According to the present application, the driving device has a simple structure.

[0086] Optionally, the drive assembly is configured as a motor; and / or

[0087] The electromagnetic heating cooking appliance further comprises a grounding wire, one end of which is connected to the housing of the driving assembly, and the other end of which is connected to a grounding terminal of the electromagnetic heating cooking appliance.

[0088] According to the present application, the drive assembly has simple control, stable performance and low cost. The grounding wire is beneficial for the drive assembly to resist electromagnetic interference.

[0089] Optionally, the transmission assembly is made of non-metallic material.

[0090] According to the present application, the transmission assembly is not disturbed by the magnetic field of the disc-shaped winding.

[0091] Optionally, the electromagnetic heating cooking appliance further comprises a magnetic shielding cover, which is used to cover at least a part of the driving device to shield the alternating magnetic field.

[0092] Furthermore, the electromagnetic heating cooking appliance further comprises a grounding wire, one end of which is connected to the magnetic shield, and the other end of which is connected to a grounding terminal of the electromagnetic heating cooking appliance.

[0093] According to the present application, the magnetic field of the driving device and the magnetic field of the disc winding do not interfere with each other as much as possible.

[0094] Optionally, the cooking container is configured to be detachably arranged at least above the wire reel device, and the reel body is located above the wire reel rack.

[0095] According to the present application, the wire reel device is arranged below the cooking container, so that the cover structure of the cooking utensil is simple or there is no cover, so that the cooking utensil can be of various types. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] The following drawings of the present application are used as a part of the present application for understanding the present application. The drawings show the implementation modes of the present application and the description thereof, and are used to explain the principle of the present application.

[0097] In the attached figure:

[0098] Figure 1 is a side cross-sectional schematic diagram of an electromagnetic heating cooking appliance according to a first embodiment of the present application;

[0099] Figure 2 for Figure 1 A schematic side cross-sectional view of a portion of the internal structure of the electromagnetic heating cooking device shown, wherein a cooking container, a wire reel device and a driving device are shown;

[0100] Figure 3 for Figure 1 An exploded schematic diagram of a wire reel device of an electromagnetic heating cooking utensil shown;

[0101] Figure 4 for Figure 1 An exploded schematic diagram of a part of the internal structure of the electromagnetic heating cooking device shown, wherein a driving device is shown;

[0102] Figure 5 It is a schematic exploded view of a wire reel device of an electromagnetic heating cooking appliance according to a second embodiment of the present application.

[0103] Description of reference numerals:

[0104] 10: Cover

[0105] 20: Claypot

[0106] 21: Accommodation cavity

[0107] 22: Circuit board assembly

[0108] 26: Base

[0109] 27: Power socket

[0110] 30: Cooking Container

[0111] 31: Cooking Space

[0112] 40: Temperature sensor assembly

[0113] 41: Spring

[0114] 42: Cable

[0115] 51: Drive components / motor

[0116] 52: Magnetic shield

[0117] 53: Ground wire

[0118] 54: Bolt

[0119] 56: Shaft hole

[0120] 57: First transmission wheel

[0121] 58: Second transmission wheel

[0122] 58A: Avoidance

[0123] 59: Motor output shaft

[0124] 161: Rotational auxiliary structure

[0125] 162: Support

[0126] 162A: Accommodation space

[0127] 162B: Accommodation space side wall

[0128] 163: First end of support member

[0129] 164: Second end of the support member

[0130] 300: Induction heating cooking appliances

[0131] 350: Drive unit

[0132] 355: Transmission components

[0133] 360 / 460: Cable drum device

[0134] 365: First stopper

[0135] 365A: First blocking part

[0136] 365B: First connection

[0137] 366: Second blocking member

[0138] 366A: Second blocking part

[0139] 366B: Second connection part

[0140] 369A: Cable hole

[0141] 369B: Through hole

[0142] 369C: Blocking surface

[0143] 369F: Opening

[0144] 369G: First additional blocking part

[0145] 369H: Second additional blocking part

[0146] 369M: First additional connection

[0147] 369N: Second additional connection

[0148] 370: Cable drum assembly

[0149] 380: Cable reel

[0150] 382: Coil winding

[0151] 389A: Cable tray through hole

[0152] 389C: Cylindrical part

[0153] 389D: Blocking surface

[0154] 389E: Opening

[0155] 389L: Side wall of cable tray through hole

[0156] 390 / 490: Turntable

[0157] 391 / 491: First Area

[0158] 392 / 492: Second Area

[0159] 393 / 493: Plate body

[0160] 394: Opening

[0161] 399: Disk body connection part

[0162] 495: Magnetic field gathering device

[0163] 496: Heat dissipation holes

[0164] P3: Central axis of cooking container

[0165] P8: Center axis of the coiling rack

[0166] P9: Geometric center axis

[0167] PA: Center axis of the cable drum assembly DETAILED DESCRIPTION

[0168] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0169] In order to thoroughly understand the present application, a detailed description will be provided in the following description. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present application is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also have other embodiments.

[0170] Ordinal numbers such as "first" and "second" cited in this application are merely identifiers and do not have any other meaning, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". The use of the words "first", "second", and "third" does not indicate any order, and these words can be interpreted as names.

[0171] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in this application are for illustrative purposes only and are not limiting.

[0172] The present application provides a wire reel device for an electromagnetic heating cooking utensil and an electromagnetic heating cooking utensil using the wire reel device.

[0173] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

[0174] First embodiment

[0175] like Figure 1 As shown, in the first embodiment according to the present application, an electromagnetic heating cooking utensil 300 (referred to as cooking utensil 300) comprises a cover 10 and a pot body 20. A heating device and a cooking container 30 (e.g., a pot) are arranged in the pot body 20. The cooking container 30 is used to hold food, and the heating device is used to heat the cooking container 30. The cover 10 is used to cover the pot body 20. When the cover 10 covers the pot body 20, a cooking space 31 is formed between the cover 10 and the cooking container 30. The volume of the cooking container 30 is, for example, 1L to 15L. It can be understood that the cooking container 30 includes a ferromagnetic material.

[0176] Specifically, the pot body 20 has a receiving cavity 21, and the cooking container 30 is removably arranged in the receiving cavity 21. The heating device is composed of a wire drum device 360 ​​and a circuit board assembly 22. Figure 2 As shown, the wire reel device 360 ​​includes a coiled wire 382, ​​which is used to form a resonant inductor of an electromagnetic heating resonant circuit, so as to generate an alternating magnetic field required for electromagnetic heating after power is turned on. The circuit board assembly 22 is used to power the coiled wire 382. The circuit board assembly 22 is provided with, for example, a resonant capacitor used in conjunction with the coiled wire 382, ​​a switch module (for example, a power switch tube IGBT), a control module, a power module, etc. The wire reel device 360 ​​is arranged at the bottom of the accommodating cavity 21, and the cooking container 30 is detachably arranged in the magnetically inductive area of ​​the wire reel device 360, for example, at least above. The cooking container 30 has a central axis P3 of the cooking container. The cooking container 30 is generally in the shape of a rotating body with the central axis P3 of the cooking container as the axis.

[0177] like Figure 2 and Figure 3 As shown, the wire reel device 360 ​​includes a wire reel assembly 370, so that the cooking container 30 and the wire reel assembly 370 are detachably arranged at least above the wire reel assembly 370. The wire reel assembly 370 has a wire reel assembly central axis PA, and the wire reel assembly 370 is configured so that the magnetic field strength of the alternating magnetic field generated by the coiled wire 382 is non-uniformly distributed along the circumferential direction of the wire reel assembly 370. When the cooking container 30 is located at least above the wire reel assembly 370 (or the wire reel device 360), the cooking container central axis P3 is parallel or substantially parallel to the wire reel assembly central axis PA, and preferably, the cooking container central axis P3 coincides or substantially coincides with the wire reel assembly central axis PA. The cooking appliance 300 is configured so that when the cooking container 30 is located at least above the wire reel assembly 370 (or the wire reel device 360), at least a portion of the wire reel assembly 370 is rotatable relative to the cooking container 30 around the wire reel assembly central axis PA. The driving device 350 is connected to the at least part of the wire reel assembly 370 and is used to drive the at least part of the wire reel assembly 370 to rotate relative to the cooking container 30 around the wire reel assembly central axis PA.

[0178] In this application, two central axes substantially coincide means that the distance between the two central axes is ≤3 mm, and the angle between the two central axes is ≤5°. That is, the two central axes are substantially parallel and close. Two central axes substantially parallel means that the angle between the two central axes is ≤5°.

[0179] It can be understood that the central axis P3 of the cooking container and the central axis PA of the wire reel assembly both extend in the height direction of the cooking appliance 300 .

[0180] In an embodiment not shown in the present application, the wire reel device 360 ​​is used to be arranged on the side of the cooking container 30 (for example, the wire reel device 360 ​​is configured to include a sleeve that can be sleeved on the outer circumference of the cooking container 30). Alternatively, the wire reel device 360 ​​can also be arranged on the cover 10 (the cover 10 includes a receiving cavity for accommodating the wire reel device 360), so that the cooking container 30 and the wire reel device 360 ​​are detachably arranged at least below the magnetically induced area of ​​the wire reel device 360. That is, in the present application, the cooking container 30 and the wire reel device 360 ​​are detachably arranged on one side of the magnetically induced area of ​​the wire reel device 360 ​​(that is, the coiled wire 382 and / or the magnetic field generated by it are located at least on the upper side, at least on the lower side or at least on the outer side of the cooking container 30), and the central axis P3 of the cooking container is substantially coincident with the central axis PA of the wire reel assembly.

[0181] According to the present application, when at least a portion of the wire reel assembly 370 rotates relative to the cooking container 30 around the central axis PA of the wire reel assembly, the non-uniform alternating magnetic field rotates relative to the cooking container 30, so that the heated portion of the cooking container 30 moves on the cooking container 30, for example, moves along the circumferential direction of the cooking container 30, thereby solving the problem of fixed heating position in the background technology.

[0182] The central axis PA of the wire drum assembly is also the central axis of the wire drum device 360. The axial direction of the wire drum assembly 370 is also the axial direction of the wire drum device 360. The circumferential direction of the wire drum assembly 370 is also the circumferential direction of the wire drum device 360.

[0183] Specifically, the wire drum device 360 ​​includes a support member 162 , a wire drum assembly 370 , a rotary substructure 161 , a first blocking member 365 , a second blocking member 366 , a second transmission wheel 58 , and a temperature sensor assembly 40 .

[0184] The wire reel assembly 370 is disposed on the support member 162. The wire reel assembly includes a coiled wire 382, ​​a wire reel frame 380 and a rotating disk 390 (also referred to as a disk body 390).

[0185] The coiled wire 382 is connected to the support member 162. The coiled wire 382 is spirally wound around the central axis PA of the coil assembly (see Figure 3), thereby forming a radially symmetrical structure with the central axis PA of the wire drum assembly as the axis. For example, in the illustrated embodiment, in the projection of the wire drum assembly 370 along the extension direction of the central axis PA of the wire drum assembly, the coiled wire 382 forms a ring area or a circular area with the central axis PA of the wire drum assembly as the center. The wire drum rack 380 is preferably configured in a disc shape. The wire drum rack 380 is connected to the support member 162, and the coiled wire 382 is spirally wound around the central axis PA of the wire drum assembly on the surface of the wire drum rack 380. The coiled wire 382 is formed by, for example, winding an enameled wire. The wire diameter of the enameled wire is, for example, 2 mm to 2.5 mm. The coiled wire 382 can be fixed to the surface of the wire drum rack 380 by a fixing member, so that the installation method of the coiled wire 382 is simple. The coiled wire 382 is connected to the support member 162 through the wire drum rack 380. The wire coiling rack 380 has a wire coiling rack central axis P8 , which coincides or substantially coincides with the wire coil assembly central axis PA. The wire coiling rack 380 is made of non-metallic material (eg, resin, plastic, etc.), so as to have no effect on the magnetic field of the coiled wire 382 .

[0186] The axial direction of the wire coiling rack 380 is also the axial direction of the wire coiling device 360. The circumferential direction of the wire coiling rack 380 is also the circumferential direction of the wire coiling device 360.

[0187] The turntable 390 includes a disk body 393, which includes a geometric center axis P9, which coincides or substantially coincides with the center axis PA of the wire drum assembly. The disk body 393 is connected to the support 162 and is spaced from the wire drum frame 380 in the axial direction of the wire drum assembly 370, and is spaced from the wire drum frame 382. The wire drum device 360 ​​is configured so that the support 162 is rotatable around the center axis PA of the wire drum assembly relative to the wire drum frame 380, that is, rotatable relative to the wire drum 382. Thus, the disk body 393 is rotatable around the center axis PA of the wire drum assembly relative to the wire drum frame 380, that is, rotatable relative to the wire drum 382. The disk body 393 is alternately divided into a first area 391 and a second area 392 along the circumferential direction of the wire disk assembly 370, or the turntable 390 includes at least one first area 391 and at least one second area 392 that are correspondingly arranged, and the first area 391 and the second area 392 are alternately arranged on the disk body 393 along the circumferential direction of the wire disk assembly 370. Among them, the first area 391 includes a medium different from the disk body 393, and the second area 392 is completely made of the material of the disk body 393, so that the magnetic field strength of the alternating magnetic field generated by the disc-shaped winding 382 at the first area 391 is different from the magnetic field strength at the second area 392, thereby forming an alternating magnetic field that is non-uniformly distributed along the circumferential direction of the wire disk assembly 370.

[0188] It can be understood that the first regions 391 are spaced apart on the disc body 393 along the circumferential direction of the wire disc assembly 370. Preferably, the first regions 391 are equally spaced apart on the disc body 393 along the circumferential direction of the wire disc assembly 370. The second regions 392 are also spaced apart on the disc body 393 along the circumferential direction of the wire disc assembly 370. Preferably, the second regions 392 are equally spaced apart on the disc body 393 along the circumferential direction of the wire disc assembly 370.

[0189] The disk body 393 is made of a first material, such as a metal having a magnetic permeability of less than or equal to 10 B / H. The first region 391 is provided with at least one opening 394 for allowing the magnetic lines of force of the alternating magnetic field generated by the disc-shaped winding 382 to pass through. Since the first material is a metal with low magnetic permeability, very few magnetic lines of force pass through the second region 392 of the disk body 390, so that on the side of the coil rack 380 opposite to the disc-shaped winding 382, ​​the magnetic lines of force of the alternating magnetic field in the first region 391 are more than those in the second region 392, so that the magnetic field strength at the first region 391 is greater than the magnetic field strength at the second region 392, and a strong magnetic region is formed at the first region 391, and a weak magnetic region is formed at the second region 392.

[0190] The heating temperature of the portion corresponding to the strong magnetic area of ​​the cooking container 30 is high, and the heating temperature of the portion corresponding to the weak magnetic area is low. The disk body 393 can rotate relative to the coiling rack 380, and thus can rotate relative to the cooking container 30. When the disk body 393 rotates, the strong magnetic area and the weak magnetic area rotate, that is, the magnetic field and the cooking container 30 rotate relative to each other, and the high-heat portion and the low-heat portion of the cooking container 30 move along the circumferential direction of the cooking container 30. The convection direction between the hot and cold areas inside the cooking container 30 is continuously changed by the movement, which is conducive to the food in the cooking container 30 to fully roll and be evenly heated.

[0191] Preferably, the area of ​​a single opening 394 is 28 mm 2 Up to 5024mm 2 The area of ​​all openings 394 accounts for 10% to 70% of the area of ​​the disk body 393. The area here refers to the area corresponding to the surface area of ​​one side of the disk body 393. The area of ​​the disk body 393 is the surface area of ​​one side when the disk body 393 does not have a through hole or a notch, that is, the area of ​​the complete disk surface. The thickness of the disk body 393 is 0.4 mm to 2 mm.

[0192] The turntable 390 may include a plurality of (e.g., 2 to 5) first regions 391 and a plurality of second regions 392. Preferably, the plurality of first regions 391 are evenly spaced along the circumferential direction of the wire reel assembly 370, and the plurality of second regions 392 are evenly spaced along the circumferential direction of the wire reel assembly 370. For example, the wire reel assembly 370 is configured such that the alternating magnetic field has N strong magnetic regions and N weak magnetic regions (N is an integer greater than or equal to 1) that are alternately distributed along the circumferential direction of the wire reel assembly 370, the N strong magnetic regions are evenly spaced along the circumferential direction of the wire reel assembly 370, and the N weak magnetic regions are evenly spaced along the circumferential direction of the wire reel assembly 370. Preferably, the cooking utensil 300 may be configured such that when the cooking container 30 is located at least above the wire reel assembly 370, at least a portion of the wire reel assembly 370 (e.g., the turntable 390) can rotate relative to the cooking container 30 by ±180 / N degrees. In the illustrated embodiment, the turntable 390 includes three first areas 391 and three second areas 392 arranged at equal intervals, and the turntable 390 can rotate ±60 degrees relative to the cooking container 30. It can be understood that when the turntable 390 rotates ±180 / N degrees relative to the cooking container 30, the strong magnetic area covers the entire cooking container 30, that is, the cooking container 30 is evenly heated. Of course, the turntable 390 can rotate at a larger angle relative to the cooking container 30 (preferably an angle that is an integer multiple of ±180 / N degrees, and the upper limit of the rotation angle is not limited), but it needs to rotate at least ±180 / N degrees to ensure that the cooking container 30 is evenly heated.

[0193] The multiple first regions 391 can be constructed to be the same or different, for example, the openings 394 of each first region 391 have different shapes, different numbers, and different total areas. There is a first distance between two adjacent openings 394 of each first region 391. Two adjacent first regions 391 have two openings 394 that are closest to each other, and there is a second distance between these two openings 394. The maximum value of the first distance is smaller than the second distance, that is, the distance between the openings 394 of two adjacent first regions 391 is significantly larger than the distance between two adjacent openings 394 inside the first region 391, so that the turntable 390 can form a clear first region 391 and a second region 392, and accordingly, the alternating magnetic field can form a clear strong magnetic region and a weak magnetic region.

[0194] Since the coiled wire 382 generates a large amount of heat after being energized, the opening 394 also helps to dissipate the heat of the coiled wire 382 .

[0195] It can be understood that there is air in the opening 394. With respect to the magnetic field of the disc winding 382, ​​the air and the first material (metal with low magnetic permeability) of the disc body 393 are two different media.

[0196] The axial direction of the rotating disk 390 is also the axial direction of the wire drum device 360, that is, the axial direction of the disk body 393. The circumferential direction of the rotating disk 390 is also the circumferential direction of the wire drum device 360, that is, the circumferential direction of the disk body 393.

[0197] The wire coiling rack 380 and the disk body 393 extend substantially parallel to each other, so that the turntable 390 can better act on the magnetic field generated by the coiled wire 382. Preferably, the wire coiling rack 380 and the disk body 393 both have a symmetrical structure, such as a radially symmetrical structure, so as to facilitate processing and better match the cooking container 30 which is also radially symmetrical. Preferably, the axial cross-sections of the wire coiling rack 380 and the disk body 393 are both C-shaped structures, so that the coiled wire 382 can surround the side wall of the cooking container 30. In the present application, the wire coiling rack 380 is used to be arranged outside the C-shaped structure of the disk body 393, that is, the wire coiling rack 380 is used at least below the disk body 393 along the height direction of the cooking utensil 300. The coiled wire 382 is arranged outside the C-shaped structure of the wire coiling rack 380, that is, the surface of the wire coiling rack 380 on the side facing away from the disk body 393. In the working state, the distance between the disc body 393 and the disc-shaped winding 382 is 3.5 mm to 10 mm, that is, the gap between the disc body 393 and the disc-shaped winding 382 is 3.5 mm to 10 mm.

[0198] The second region 392 is made of a metal material and has good thermal conductivity. Therefore, the second region 392 can help the disc-shaped winding 382 to dissipate heat. The second region 392 is also called a heat dissipation region.

[0199] The support member 162 is, for example, generally cylindrical. The support member 162 includes a support member first end 163 and a support member second end 164 that are arranged oppositely in the axial direction of the wire drum assembly 370. In the working state, the support member first end 163 is located above the support member second end 164. The wire drum frame 380 is connected to the support member second end 164, and the drum body 393 is connected to the support member first end 163. The wire drum device 360 ​​is configured so that the drum body 393 rotates synchronously with the support member second end 164 (i.e., the support member 162) around the central axis PA of the wire drum assembly, so as to be rotatable relative to the wire drum frame 380.

[0200] A disk body connection portion 399 is provided at the central portion or approximately the central portion of the disk body 393, and is used to connect the disk body 390 to the support member 162 of the electromagnetic heating cooking device 300. The disk body connection portion 399 includes a circular hole with the geometric center axis P9 as the axis. Thus, the disk body 393 is sleeved on the outer periphery of the first end portion 163 of the support member. The disk body 393 is connected to the first end portion 163 of the support member by, for example, bonding, clamping, or screwing.

[0201] A wire coil through hole 389A extending in the axial direction of the wire coil 380 is provided at the central part or approximately the central part of the wire coil 380, and the support member 162 is provided in the wire coil through hole 389A. For example, a cylindrical portion 389C extending in the axial direction of the wire coil 380 is provided at the central part or approximately the central part of the wire coil 380, and the wire coil through hole 389A is formed inside the cylindrical portion 389C, and the solid part of the cylindrical portion 389C is the side wall 389L of the wire coil through hole 389A (the side wall 389L of the wire coil through hole 389A is also the side wall of the cylindrical portion 389C). The central axis of the cylindrical portion 389C coincides with the central axis PA of the wire coil assembly. The support member 162 is adapted to the wire coil through hole 389A, so that the support member 162 can rotate relative to the wire coil 380 around the central axis PA of the wire coil assembly. For example, the wire drum device 360 ​​further includes a swivel substructure 161, and the side wall 389L of the wire drum through hole 389A is connected to the outer peripheral surface of the second end portion 164 of the support member through the swivel substructure 161, wherein the axis of the swivel substructure 161 coincides with the central axis PA of the wire drum assembly.

[0202] For example, the side wall 389L of the through hole of the wire drum is connected to the outer peripheral surface of the second end 164 of the support member through the revolving substructure 161. The side wall 389L of the through hole of the wire drum is connected to the outer ring of the revolving substructure 161, and the second end 164 of the support member is tightly matched with the inner ring of the revolving substructure 161, so that the cylindrical portion 389A can stably rotate relative to the support member 162, so that the wire drum frame 380 can stably rotate relative to the support member 162. The revolving substructure 161 is configured as a rolling bearing or a sliding sleeve, for example. Preferably, the revolving substructure 161 is made of non-metallic material (such as resin, plastic) so as not to interfere with the magnetic field of the disc winding 382.

[0203] The wire drum device 360 ​​further includes a second blocking member 366, which is disposed at the second end portion 164 of the support member. The second blocking member 366 includes a second blocking portion 366A extending outwardly in the radial direction of the wire drum assembly 370. The outer peripheral surface of the support member 162 includes a blocking surface 369C extending toward the side wall 389L in the radial direction of the wire drum assembly 370, and / or the inner peripheral surface of the wire drum through hole 389A includes a blocking surface 389D extending toward the support member 162 in the radial direction of the wire drum assembly 370, and the wire drum device 360 ​​is configured so that the rotary auxiliary structure 161 is limited between the blocking surface 369C (and / or 389D) and the second blocking portion 366A along the axial direction of the wire drum assembly 370.

[0204] When the wire coil device 360 ​​is placed in the accommodating cavity 21 of the pot body 20, the outer peripheral edge of the wire coil rack 380 is connected to the cavity wall of the accommodating cavity 21 (see Figure 1), so that the wire drum frame 380 is supported by the pot body 20. In order to rotate the support member 162, the wire drum device 360 ​​further includes a second transmission wheel 58, which is connected to the support member 162 (for example, it is sleeved on the outer periphery of the support member 162 and engaged with the support member 162 through splines and keyways), and is used to drive the support member 162 to rotate relative to the wire drum frame around the central axis PA of the wire drum assembly under the drive of the driving device 350. In order to allow the driving device 350 to contact the second transmission wheel 58, the second blocking member is provided with an opening 369F, and / or the side wall 389L of the wire drum through hole 389A is provided with an opening 389E, which is used to expose the second transmission wheel 58.

[0205] Specifically, the second transmission wheel 58 is arranged between the rotary substructure 161 and the blocking surface 369C (and / or 389D) along the axial direction of the wire drum assembly 370. Part of the second blocking portion 366A is connected between the rotary substructure 161 and the side wall 389L of the wire drum through hole 389A along the radial direction of the wire drum assembly 370, so that there is a gap in the radial direction between the rotary substructure 161 and the side wall 389L, so that the second transmission wheel 58 can exceed the rotary substructure 161 in the radial direction, which is convenient for connecting with the driving device 350. Preferably, the second transmission gear 58 is provided with an avoidance portion 58A to avoid the outer ring of the rotary substructure 161. That is, the second transmission gear 58 and the support member 162 are both connected to the inner ring of the rotary substructure 161.

[0206] For example, the second blocking portion 366A includes a first additional connection portion 369M and a second additional connection portion 369N, which are arranged at intervals in the radial direction of the wire drum assembly 370, and the first additional connection portion 369M is further outward than the second additional connection portion 369N in the radial direction. The first additional connection portion 369M and the second additional connection portion 369N extend, for example, in the axial direction of the wire drum assembly 370. The first additional connection portion 369M is used to connect with the side wall 389L of the cylindrical portion 389C (for example, by snapping, bonding, or screwing), and the second additional connection portion 369N is used to tightly fit with the outer ring of the rotary auxiliary structure 161. The opening 369F is provided in the first additional connection portion 369M.

[0207] The wire drum device 360 ​​further includes a first blocking member 365. The first blocking member 365 is disposed at the first end portion 163 of the support member. The first blocking member 365 includes a first blocking portion 365A extending outwardly in the radial direction of the wire drum assembly 370, and is used to prevent the support member 162 from moving in the axial direction of the wire drum assembly 370 in a direction away from the second end portion 164 of the support member. That is, the first blocking portion 365A covers at least a portion of the first end portion 163 of the support member in the axial direction.

[0208] like Figure 2As shown, the support member 162 includes a receiving space 162A, and the receiving space 162A is used to receive the temperature sensor assembly 40. The temperature sensor assembly 40 is exposed from the surface of the support member 162 for contacting the cooking container 30, thereby sensing the temperature of the cooking container 30, that is, sensing the temperature of the food. The temperature sensor assembly 40 is exposed from the first end 163 of the support member, and the second end 164 of the support member is provided with an outlet for leading out the cable 42 of the temperature sensor assembly 40. Preferably, the receiving space 162A passes through the support member 162 along the axial direction of the cable drum assembly 370. The solid part of the support member 162 constitutes the side wall 162B of the receiving space 162A (the side wall 162B of the receiving space 162A is also the side wall 162B of the support member 162).

[0209] The first blocking member 365 also includes a first connecting portion 365B connected to the first blocking portion 365A, the first connecting portion 365B extends, for example, in the axial direction of the wire drum assembly 370 and is located inside the first blocking portion 365A in the radial direction. The second blocking member 366 also includes a second connecting portion 366B connected to the second blocking portion 366A, the second connecting portion 366B extends, for example, in the axial direction of the wire drum assembly 370 and is located inside the second blocking portion 366A in the radial direction. The first connecting portion 365B and the second connecting portion 366B are connected to each other in the accommodating space 162A (for example, by clamping, bonding, or screwing). The first connecting portion 365B and the second connecting portion 366B are also configured as a sleeve, so that the two are connected to form a sleeve, and the support member 162 is clamped between this sleeve and the cylindrical portion 389C in the radial direction of the wire drum assembly 370. The support member 162 is sandwiched between the first blocking portion 365A and the second blocking portion 366A in the axial direction of the drum assembly 370 .

[0210] When the cable drum device 360 ​​is placed in the accommodating chamber 21, the outer peripheral edge of the cable drum 380 is connected to the chamber wall of the accommodating chamber 21, so that the cable drum 380 is stably supported. The second blocking member 366 is mounted to the cylindrical portion 389C of the cable drum 380, so that the second blocking member 366 is stably supported. In addition, the rotary substructure 161, the second transmission wheel 58, the support member 162 and the first blocking member 365 are all stably supported.

[0211] The temperature sensor assembly 40 is disposed in the inner cavity of the sleeve formed by the first connection portion 365B and the second connection portion 366B. The end of the first blocking member 365 corresponding to the end of the first connection portion 365B connected to the first blocking portion 365A is provided with a through hole 369B for exposing the temperature sensor assembly 40. The second blocking member 366 is provided with a wire hole 369A for passing the cable 42 of the temperature sensor assembly 40. It can be understood that the sleeve-shaped second connection portion 366B can naturally form the wire hole 369A.

[0212] When the cooking container 30 is placed in the pot body 20, in order to protect the temperature sensor assembly 40, the temperature sensor assembly 40 includes a spring 41 extending in the axial direction of the wire coil assembly 370. In order to prevent the temperature sensor assembly 40 from leaving the accommodation space 162A, the first blocking member 365 is provided with a first additional blocking portion 369G, and the second blocking member 366 is provided with a second additional blocking portion 369H. At least part of the temperature sensor assembly 40 is limited between the first additional blocking portion 369G and the second additional blocking portion 369H in the axial direction of the wire coil assembly 370.

[0213] In the present application, the first additional blocking portion 369G is a portion of the first blocking member 365 located around the through hole 369B, and the aperture of the through hole 369B is smaller than the diameter of the spring 41. The first additional blocking portion 369G can also be understood as a portion of the end wall (top wall) of the first blocking member 365. The second additional blocking portion 369H is an annular step surface provided on the inner wall of the sleeve of the second connecting portion 366B, and the diameter of the inner ring of the annular step surface is smaller than the diameter of the spring 41. Thus, the spring 41 is limited between the end wall of the first blocking member 365 and the step surface of the second blocking member 366, so that the temperature sensor assembly 40 cannot be separated from the inner cavity of the sleeve formed by the first connecting portion 365B and the second connecting portion 366B, and cannot be separated from the accommodating space 162A.

[0214] like Figure 1 As shown, the coiled wire 382 is located on the lower surface of the wire reel device 360 ​​, so that the coiled wire 382 does not interfere with the turntable 390 and can be conveniently connected to the circuit board assembly 22 .

[0215] The driving device 350 is connected to the turntable 390, and is used to drive the turntable 390 (i.e., the turntable body 393) to rotate relative to the disk-shaped winding 382 (i.e., the wire coiling frame 380, i.e., the pot body 20) around the central axis PA of the wire coil assembly. Specifically, the driving device 350 is connected to the support member 162, and is used to drive the support member 162 to rotate relative to the disk-shaped winding 382 (i.e., the wire coiling frame 380, i.e., the pot body 20) around the central axis PA of the wire coil assembly.

[0216] The driving device 350 includes a driving assembly 51 and a transmission assembly 355. The driving assembly 51 is used to provide a driving force for rotating the disk body 393 and the support member 162 relative to the disk winding 382. The transmission assembly 355 is connected between the driving assembly 51 and the support member 162 to transmit the driving force to the disk body 393 and the support member 162.

[0217] The drive assembly 51 is configured as a motor, such as a stepper motor. The motor 51 is electrically connected to the control module of the circuit board assembly 22 to operate under the control of the control module. By controlling the motor 51, the control module can realize the forward and reverse rotation and intermittent rotation of the turntable 390, and the speed and stroke are adjustable. The speed range of the turntable 390 is, for example, 1r / min to 350r / min, preferably 4r / min to 6r / min. Preferably, the output shaft 59 of the motor 51 is made of non-metallic material (such as resin, plastic), so that the output shaft 59 of the motor 51 and the magnetic field of the disc winding 382 do not affect each other. The output shaft 59 of the motor 51 can also be made of metal material. The drive assembly 51 can be arranged on the bottom wall of the accommodating cavity 21, so that the drive assembly 51 is close to the wire drum device 360.

[0218] In order to prevent the magnetic field of the motor 51 from interfering with the magnetic field of the disc winding 382, ​​as shown in FIG. Figure 4 As shown, preferably, the cooking appliance 300 further includes a magnetic shield 52, which is made of metal material and is used to cover at least part of the driving device 50 (for example, the motor 51) to shield the alternating magnetic field of the disc winding 382, ​​and also shield the magnetic field of the driving device 50. For example, the motor 51 is mounted on the base 26 of the pot body 20 by two bolts 54, and the magnetic shield 52 can be simultaneously mounted to the base 26 by the two bolts 54, so that the housing of the motor 51 is in contact with the magnetic shield 52. The magnetic shield 52 is provided with an axial hole 56 for the motor output shaft 59 to pass through. Preferably, the cooking appliance 300 further includes a grounding wire 53, one end of which is connected to the magnetic shield 52 and / or the housing of the motor 51 (for example, fixed to the magnetic shield 52 by bolts 54), and the other end of the grounding wire 53 is connected to the grounding terminal of the electromagnetic heating cooking appliance 300, such as the grounding terminal on the circuit board assembly 22 or the grounding terminal of the power socket 27. Therefore, the grounding wire 53 grounds the housing of the motor 51 and the magnetic shield 52 together to further isolate the magnetic field.

[0219] The transmission assembly 355 at least includes a first transmission wheel 57. The first transmission wheel 57 is used to be coaxially connected to the output shaft of the motor 51 so as to rotate under the drive of the motor 51. The second transmission wheel 58 is connected to the first transmission wheel 57, and the transmission assembly 355 is configured so that the second transmission wheel 58 drives the support member 162 and the rotating disk 390 to rotate synchronously under the drive of the first transmission wheel 57. The first transmission wheel 57 and the second transmission wheel 58 are, for example, both configured as gears, and the two are meshed with each other for transmission. Alternatively, the first transmission wheel 57 and the second transmission wheel 58 are, for example, both configured as friction wheels, and the two are in contact with each other through friction transmission. Alternatively, the first transmission wheel 57 and the second transmission wheel 58 are driven by a belt or a chain. Preferably, the transmission assembly 355 is made of non-metallic material. For example, the first transmission wheel 57 and the second transmission wheel 58 are made of plastic or resin.

[0220] In the illustrated embodiment, the cooking utensil 300 is an electric rice cooker. Based on the wire reel device 360 ​​of the present application, the cooking utensil 300 may also be an electric pressure cooker, an electric stew pot, an electric hot pot, an electric kettle (health kettle) or an induction cooker (including a stove and a cooking container).

[0221] Second embodiment

[0222] Figure 5 A wire reel device 460 of an electromagnetic heating cooking appliance according to a second embodiment of the present application is shown. Unlike the first embodiment, in the second embodiment, the structure of the turntable 490 of the wire reel assembly 470 is different from the structure of the turntable 390 of the first embodiment.

[0223] Specifically, the turntable 490 includes a turntable body 493, and the turntable body 493 includes a geometric center axis P9, which coincides or substantially coincides with the center axis PA of the wire drum assembly. The turntable body 493 is connected to the support member 162, and is spaced from the wire drum frame 380 along the axial direction of the wire drum assembly 470, and is spaced from the coiled wire 382. The turntable body 493 is configured to be rotatable relative to the wire drum frame 380 around the center axis PA of the wire drum assembly, and is rotatable relative to the coiled wire 382. The turntable body 493 is alternately divided into a first area 491 and a second area 492 along the circumferential direction of the wire drum assembly 470, or the turntable 490 includes at least one first area 491 and at least one second area 492 correspondingly arranged, and the first area 491 and the second area 492 are alternately arranged on the turntable body 493 along the circumferential direction of the wire drum assembly 470. Among them, the first region 491 includes a material different from the disk body 493, and the second region 492 is entirely made of the material of the disk body 493, so that the alternating magnetic field generated by the disk winding 382 has a magnetic field strength in the first region 491 that is different from that in the second region 492, thereby forming an alternating magnetic field that is unevenly distributed in the circumferential direction of the wire disk assembly 470.

[0224] It can be understood that the first regions 491 are spaced apart on the disc body 493 along the circumferential direction of the wire disc assembly 470. Preferably, the first regions 491 are equally spaced apart on the disc body 493 along the circumferential direction of the wire disc assembly 470. The second regions 492 are also spaced apart on the disc body 493 along the circumferential direction of the wire disc assembly 470. Preferably, the second regions 492 are equally spaced apart on the disc body 493 along the circumferential direction of the wire disc assembly 470.

[0225] The disk body 493 is made of a first material, such as a non-magnetic material or a metal with a magnetic permeability of less than or equal to 10B / H. The first region 491 is provided with at least one magnetic line of force gathering member 495, and the magnetic line of force gathering member 495 includes a second material different from the first material, such as a metal with a magnetic permeability of greater than or equal to 100B / H. Since the magnetic permeability of the second material is greater than that of the first material, the magnetic lines of force of the alternating magnetic field are focused (gathered) at the magnetic line of force gathering member 495, so that the magnetic field intensity at the first region 491 is greater than the magnetic field intensity at the second region 492, a strong magnetic region is formed at the first region 491, and a weak magnetic region is formed at the second region 492. For the magnetic field of the disk winding 382, ​​the first material and the second material are two different media.

[0226] A hole or a groove may be formed on the disk body 493 of the first region 491, and the magnetic force line gathering member 495 may be embedded in the hole or the groove. The magnetic force line gathering member 495 may also be attached to the surface of the disk body 493 of the first region 491. Alternatively, the magnetic force line gathering member 495 may be clamped on the disk body 493. Preferably, the thickness of the magnetic force line gathering member 495 is 2 mm to 10 mm. The area of ​​a single magnetic force line gathering member 495 is 28 mm. 2 Up to 5024mm 2 . The area of ​​all magnetic line gathering pieces 495 accounts for 10% to 70% of the area of ​​the disk body 493. The area here refers to the area corresponding to the surface area of ​​one side of the disk body 493. The area of ​​the disk body 493 is the surface area of ​​one side when the disk body 493 does not have a through hole or a notch, that is, the area of ​​the complete disk surface. The area of ​​the magnetic line gathering piece 495 can be understood as the area of ​​its projection on the corresponding part of the complete disk surface of the disk body 493. In the assembled state of the online disk device 460, the distance between the magnetic line gathering piece 495 and the disk winding 382 is 3.5mm to 15mm, that is, the gap between the magnetic line gathering piece 495 and the disk winding 382 is 3.5mm to 15mm.

[0227] The multiple first regions 491 can be constructed to be the same or different. For example, the magnetic line of force gathering members 495 of each first region 491 have different shapes (can be rectangular, circular, annular, L-shaped, C-shaped, etc., the present application does not make specific restrictions, it can be understood that at least part of the magnetic line of force gathering members 495 extends along the magnetic lines of force of the magnetic field of the disc winding 382), different numbers, and different total areas. There is a first distance between two adjacent magnetic line of force gathering members 495 of each first region 491. Two adjacent first regions 491 have two magnetic line of force gathering members 495 that are closest to each other, and there is a second distance between these two magnetic line of force gathering members 495. The maximum value of the first distance is smaller than the second distance, that is, the distance between the magnetic line gathering parts 495 of two adjacent first areas 491 is significantly larger than the distance between two adjacent magnetic line gathering parts 495 inside the first area 491, so that the turntable 490 can form a clear first area 491 and a second area 492, and accordingly, the alternating magnetic field can form clear strong magnetic areas and weak magnetic areas.

[0228] Since the disc-shaped winding 382 generates a lot of heat after being energized, preferably, the second area 492 is provided with at least one heat dissipation hole 496 to help dissipate heat. Therefore, the second area 492 is also called a heat dissipation area, and at least one heat dissipation area is provided on the rotating disk 490. The plurality of second areas 492 may be constructed in the same manner or in different manners, for example, the heat dissipation holes of each second area 492 may have different shapes, different numbers, and different total areas.

[0229] Therefore, the second embodiment differs from the first embodiment mainly in the formation of the medium different from the disk body 493 in the first area 491 of the turntable 490. For the parts not introduced in the second embodiment, refer to the description of the first embodiment.

[0230] The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

[0231] In understanding the scope of the present application, the term "comprising" and its derivatives as used herein are intended to be open terms, which specify the existence of the recorded features, elements, components, groups, wholes and / or steps, but do not exclude the existence of other unrecorded features, elements, components, groups, wholes and / or steps. This concept also applies to words with similar meanings, such as the terms "including", "having" and their derivatives.

[0232] The terms "attached" or "attached" as used herein include: a configuration where an element is directly secured to another element by directly securing the element to the other element; a configuration where an element is indirectly secured to another element by securing the element to an intermediate member which in turn is secured to the other element; and a configuration where one element is integral with the other element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings such as "connect," "connect," "couple," "mount," "bond," "fix," and their derivatives. Finally, terms of degree such as "substantially," "approximately," and "approximately" as used herein represent the amount of deviation that modifies the term such that the end result will not be significantly changed.

[0233] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present application. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present application. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0234] The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present application to the described embodiments. In addition, it can be understood by those skilled in the art that the present application is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed by the present application.

Claims

1. A coil spool device for an electromagnetic heating cooking appliance, characterized in that, it comprises: a support member; and a coil spool assembly connected to the support member, the coil spool assembly having a central axis of the coil spool assembly, the coil spool assembly comprising: a disc-shaped winding disposed on the coil spool assembly and wound around the central axis of the coil spool assembly for forming a resonant inductor of an electromagnetic heating resonant circuit to generate an alternating magnetic field required for electromagnetic heating after being energized, and a turntable, the turntable comprising: a disc body connected to the support member, and at least one first region and at least one second region disposed on the turntable, the first region and the second region being alternately arranged along the circumferential direction of the coil spool assembly on the disc body, the medium in the first region being different from the medium of the disc body so that the magnetic field intensity at the first region of the alternating magnetic field is different from the magnetic field intensity at the second region; wherein, the coil spool device is configured such that the turntable can rotate relative to the disc-shaped winding around the central axis of the coil spool assembly.

2. The coil spool device according to claim 1, characterized in that, the coil spool assembly further comprises a coil spool holder connected to the support member, the disc-shaped winding being wound around the central axis of the coil spool assembly on the coil spool holder, wherein, the turntable is configured to be rotatable around the central axis of the coil spool assembly relative to the coil spool holder.

3. The coil spool device according to claim 2, characterized in that, the disc-shaped winding is wound around the central axis of the coil spool assembly on the surface of the coil spool holder facing away from the disc body.

4. The coil spool device according to claim 2, characterized in that, a coil spool through hole extending in the axial direction of the coil spool holder is provided at the central portion of the coil spool holder, the support member being adapted to the coil spool through hole such that the support member can rotate relative to the coil spool holder around the central axis PA of the coil spool assembly, thereby driving the turntable to rotate.

5. The coil spool device according to claim 4, characterized in that, the support member is disposed in the coil spool through hole, the coil spool device further comprises a revolute pair structure, the coil spool through hole and the support member being connected through the revolute pair structure, wherein the axis of the revolute pair structure coincides with the central axis of the coil spool assembly.

6. The coil spool device according to claim 5, characterized in that, the support member has a first end portion of the support member and a second end portion of the support member oppositely arranged in the axial direction of the coil spool assembly, wherein, the disc body is connected to the first end portion of the support member, and the coil spool holder is connected to the second end portion of the support member.

7. The coil spool device according to claim 6, characterized in that, the coil spool device further comprises a second blocking member disposed at the second end portion of the support member, the second blocking member comprising a second blocking portion extending radially outward in the radial direction of the coil spool assembly, The outer peripheral surface of the support member includes a blocking surface extending toward the side wall of the wire drum through hole in the radial direction of the wire drum assembly, and / or the inner peripheral surface of the wire drum through hole includes a blocking surface extending toward the support member in the radial direction of the wire drum assembly. The wire drum device is configured such that the rotary auxiliary structure is constrained between the blocking surface and the second blocking portion along the axial direction of the wire drum assembly.

8. The cable drum device according to claim 7, It is characterized in that Part of the second blocking portion is connected between the rotary auxiliary structure and the side wall of the wire drum through hole along the radial direction of the wire drum assembly.

9. The cable drum device according to claim 8, It is characterized in that A second transmission wheel is arranged between the rotary substructure and the blocking surface. The second transmission wheel is connected to the support member and is used to drive the support member to rotate relative to the wire coiling frame around the central axis of the wire coil assembly under the drive of the driving device.

10. The cable drum device according to claim 9, It is characterized in that The second blocking member and / or the side wall of the wire drum through hole is provided with an opening for exposing the second transmission wheel; and / or The second transmission wheel is made of non-metallic material.

11. The cable drum device according to claim 7, It is characterized in that The second blocking member is engaged or screwed to the cylindrical portion.

12. The cable drum device according to claim 7, It is characterized in that The wire drum device also includes a first blocking member, which is arranged at the first end of the support member. The first blocking member includes a first blocking portion extending outward in the radial direction of the wire drum assembly, and is used to prevent the support member from moving in the axial direction of the wire drum assembly toward a direction away from the second end of the support member.

13. The cable drum device according to claim 12, It is characterized in that The support member is internally configured with a receiving space penetrating the support member along the axial direction of the wire drum assembly. The first blocking member further includes a first connecting portion connected to the first blocking portion, and the second blocking member further includes a second connecting portion connected to the second blocking portion. The first connection portion and the second connection portion are connected to each other in the accommodation space.

14. The cable drum device according to claim 5, It is characterized in that The rotary auxiliary structure is made of non-metallic material; and / or The rotary auxiliary structure is configured as a rolling bearing or a sliding sleeve.

15. The wire drum device according to claim 2, It is characterized in that The axial cross-sections of the cable reel and the reel body are C-shaped structures, and the reel body is located inside the C-shaped structure of the cable reel.

16. The cable drum device according to claim 2, It is characterized in that The wire drum assembly is constructed so that the alternating magnetic field has N strong magnetic regions and N weak magnetic regions that are alternately distributed along the circumferential direction of the wire drum assembly, wherein the magnetic field strength of the strong magnetic region is greater than the magnetic field strength of the weak magnetic region, the N strong magnetic regions are evenly spaced along the circumferential direction of the wire drum assembly, and the N weak magnetic regions are evenly spaced along the circumferential direction of the wire drum assembly, and N is an integer greater than or equal to 1.

17. A cable drum device according to any one of claims 2 to 16, It is characterized in that The disk body is made of a metal material with a magnetic permeability less than or equal to 10 B / H, and the first area includes at least one opening for allowing the magnetic lines of force of the alternating magnetic field to pass through.

18. The cable drum device according to claim 17, It is characterized in that The distance between the disc body and the disc winding is 3.5 mm to 10 mm; and / or The disc body has a thickness of 0.4 mm to 2 mm.

19. The cable drum device according to claim 17, It is characterized in that The area of ​​a single opening is 28 mm 2 Up to 5024mm 2 ; and / or The area of ​​all the openings accounts for 10% to 70% of the area of ​​the disk body.

20. A cable drum device according to any one of claims 2 to 16, It is characterized in that The disk body is made of a first material, the first region is provided with at least one magnetic line of force gathering member, and the magnetic line of force gathering member comprises a second material different from the first material.

21. The cable drum device according to claim 20, It is characterized in that 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.

22. The cable drum device according to claim 20, It is characterized in that The area of ​​a single magnetic field gathering piece is 28mm 2 Up to 5024mm 2 ; and / or The area of ​​all the magnetic flux converging members accounts for 10% to 70% of the area of ​​the disk body.

23. The cable drum device according to claim 20, It is characterized in that The magnetic field line gathering member is connected to the disk body via at least one of the following connection structures: The magnetic field line gathering member is embedded in the disk body. The magnetic line gathering member is attached to the surface of the disk body, and The magnetic line gathering member is snap-connected with the disk body.

24. The cable drum device according to claim 20, It is characterized in that The distance between the magnetic field line gathering member and the disc winding is 3.5 mm to 15 mm; and / or The thickness of the magnetic line gathering member is 2 mm to 10 mm.

25. The cable drum device according to claim 20, It is characterized in that The second area is provided with at least one heat dissipation hole.

26. An electromagnetic heating cooking appliance, It is characterized in that include: Receiving cavity; and The wire reel device according to any one of claims 2 to 25, wherein the wire reel device is located in the accommodating cavity, wherein the wire reel rack is connected to a cavity wall of the accommodating cavity; A cooking container for holding food, the cooking container being detachably arranged on one side of the wire reel device from the wire reel device, the cooking container comprising a ferromagnetic material; and A driving device is connected to the support member and is used to drive the support member to rotate relative to the wire coiling frame around the central axis of the wire coil assembly.

27. The electromagnetic heating cooking device according to claim 26, It is characterized in that The driving device comprises: a drive assembly for providing a driving force for rotating the support member relative to the cable drum; and The transmission assembly is connected between the driving assembly and the supporting member and is used for transmitting the driving force to the supporting member.

28. The electromagnetic heating cooking device according to claim 27, It is characterized in that The drive assembly is configured as a motor; and / or The electromagnetic heating cooking appliance further comprises a grounding wire, one end of which is connected to the housing of the driving assembly, and the other end of which is connected to a grounding terminal of the electromagnetic heating cooking appliance.

29. The electromagnetic heating cooking device according to claim 27, It is characterized in that The transmission component is made of non-metallic material.

30. The electromagnetic heating cooking device according to claim 26, It is characterized in that It also includes a magnetic shielding cover, which is used to cover at least part of the driving device to shield the alternating magnetic field.

31. The electromagnetic heating cooking device according to claim 30, It is characterized in that The invention also comprises a grounding wire, one end of which is connected to the magnetic shield, and the other end of which is connected to the grounding terminal of the electromagnetic heating cooking appliance.

32. The electromagnetic heating cooking device according to any one of claims 26 to 31, It is characterized in that The cooking container is used to be detachably arranged at least above the wire reel device, and the reel body is located above the wire reel rack.

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