Coil panel and hob

Abstract

The application provides a coil panel and a stove. The coil panel has a heating side. The coil panel comprises a support, a coil assembly, a magnetic sensing element and a magnetic strip assembly. The coil assembly, the magnetic strip assembly and the magnetic sensing element are arranged on the support. The coil assembly comprises an inner coil and an outer coil. The magnetic sensing element is located on one side of the inner coil facing the heating side and on the radially inner side of the outer coil. The magnetic sensing element is configured to heat under the magnetic field of the inner coil and the outer coil. The magnetic strip assembly comprises a first magnetic part and a second magnetic part. The second magnetic part is located on the outer side of the first magnetic part. The first magnetic part is arranged corresponding to the inner coil, and the second magnetic part is arranged corresponding to the outer coil. One side of the first magnetic part facing the inner coil has a first surface. One side of the second magnetic part facing the outer coil has a second surface. The second surface is arranged close to the heating side relative to the first surface. The second surface and the first surface have a first distance T1. The coil panel of the application reduces the deformation degree of the magnetic sensing element and improves the heating effect of the coil panel.

Description

[0001] Cross-referencing related documents

[0002] This application claims priority to Chinese Patent Application No. 202520652279.5, filed on April 8, 2025, entitled "Coil Coil and Stove", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of kitchen appliance technology, and more particularly to a coil and a stove. Background Technology

[0004] An induction cooker is a common cooking appliance with advantages such as high heating efficiency, fast heating speed, and safe use of electric heating.

[0005] Traditional induction cookers cannot directly heat non-magnetic cookware. Chinese patent number 01209627.X discloses an induction cooker that uses a magnetically conductive metal plate between the excitation coil and the cooktop. The metal plate senses the magnetic field of the excitation coil and generates heat, which is then transferred to the cooktop to directly heat or keep food warm.

[0006] However, during use, the magnetic field generated by the excitation coil is concentrated at the center of the metal plate, while the magnetic field at the edge of the metal plate is weaker and the magnetic field distribution is uneven. As a result, the metal plate is prone to deformation, which in turn reduces the heating efficiency of the metal plate. Utility Model Content

[0007] Based on this, this application provides a coil and a stove, which optimizes the magnetic field distribution of the coil to reduce the deformation of the magnetic sensing element, thereby improving the heating effect of the stove.

[0008] The coil disk provided in this application has a heating side. The coil disk includes a support, a coil assembly, a magnetic strip assembly, and a magnetic sensing element. The coil assembly includes an inner coil and an outer coil arranged coaxially. The coil assembly, the magnetic sensing element, and the magnetic strip assembly are all disposed on the support.

[0009] The magnetic sensing element is located on the side of the inner coil facing the heating side and is located radially inside the outer coil. The magnetic sensing element is configured to generate heat under the influence of the magnetic fields of the inner and outer coils.

[0010] The magnetic strip assembly includes a first magnetic part and a second magnetic part disposed radially inside and outside the coil assembly. The second magnetic part is located outside the first magnetic part. The first magnetic part is disposed corresponding to the inner coil, and the second magnetic part is disposed corresponding to the outer coil. The first magnetic part has a first surface on the side facing the inner coil, and the second magnetic part has a second surface on the side facing the outer coil.

[0011] Along the axial direction of the coil assembly, the second surface is disposed closer to the heating side relative to the first surface, and there is a first distance T1 between the second surface and the first surface.

[0012] In this embodiment, the coil disk utilizes a first magnetic part and a second magnetic part working together to guide the magnetic field towards the magnetizing element, thereby increasing the magnetic field strength acting on the magnetizing element. By positioning the second surface closer to the heating side relative to the first surface and creating a first gap between them, the magnetic field guided by the second magnetic part is prevented from diffusing outwards towards the coil assembly, thus reducing the magnetic field strength at the edge of the coil assembly. This prevents the magnetic field from being stronger at the center of the magnetizing element and weaker at the outer edges. This arrangement enhances the magnetic field focusing effect of the second magnetic part, making the magnetic field strength acting on the outer edges of the magnetizing element more consistent with that acting on the center. This results in more uniform heating across the magnetizing element, preventing deformation caused by uneven heating and improving the heating efficiency of the coil disk.

[0013] In one possible implementation, the first spacing T1 satisfies: 1 mm ≤ T1 ≤ 30 mm.

[0014] In this way, the second surface can be made higher than the first surface, which is beneficial for the second magnetic part to guide the magnetic field around the coil assembly to converge towards the magnetizing element. Furthermore, it is beneficial to control the size of the magnetic strip assembly along the axial direction of the coil assembly, thereby facilitating the control of the volume of the coil disk.

[0015] In one possible implementation, along the axial direction of the coil assembly, the first surface has a second spacing T2 between it and the inner coil, and the second surface has a third spacing T3 between it and the outer coil.

[0016] This design helps prevent breakdown caused by contact between the coil assembly and the magnetic strip assembly, thereby improving the safety of the coil assembly and enhancing the magnetic field strength of the coil assembly.

[0017] In one possible implementation, the second spacing T2 satisfies: 0.5 mm ≤ T2 ≤ 5 mm; and / or, the third spacing T3 satisfies: 0.5 mm ≤ T3 ≤ 5 mm.

[0018] This is beneficial for improving the safety of the inner and outer coils, as well as for enhancing the magnetic field strength of the inner and outer coils.

[0019] In one possible implementation, along the axial direction of the coil assembly, at least a portion of the orthographic projection of the first magnetic portion lies within the region enclosed by the outermost ring of the inner coil.

[0020] The projected area S1 of all the first magnetic parts within the region enclosed by the outermost ring of the inner coil and the projected area S2 of the region enclosed by the outermost ring of the inner coil satisfy: S1 / S2≥0.3.

[0021] In this way, the projected area of ​​the first magnetic part inside the inner coil can be increased, thereby increasing the magnetic field strength and uniformity of the inner coil acting on the magnetic sensing element, thus improving the heating efficiency and heating uniformity of the magnetic sensing element.

[0022] In one possible implementation, the first magnetic part includes a first sub-magnetic part, a first surface is located on the first sub-magnetic part, and the first sub-magnetic part is disk-shaped; or, a plurality of first sub-magnetic parts extend radially along the coil assembly and are spaced apart circumferentially along the coil assembly.

[0023] Thus, the first sub-magnetic part is positioned corresponding to one axial side of the inner coil, so that the first sub-magnetic part effectively enhances the magnetic field of the inner coil. When the first sub-magnetic part is disc-shaped, S1 / S2=1, thereby effectively increasing the radiation area of ​​the first magnetic part located inside the inner coil, thereby effectively improving the heating uniformity of the cookware.

[0024] In one possible implementation, the second magnetic part includes a plurality of second sub-magnetic parts, and the second surface is located in the second sub-magnetic parts;

[0025] Several second submagnetic parts extend radially along the coil assembly and are spaced apart circumferentially along the coil assembly.

[0026] Thus, several second submagnetic parts are arranged on the outer periphery of the first magnetic part, and the second submagnetic parts are arranged corresponding to one axial side of the outer coil, so as to guide the magnetic field of the outer coil to converge towards the magnetizing element through the second submagnetic parts.

[0027] In one possible implementation, the first submagnetic part and the second submagnetic part are arranged in a one-to-one correspondence; the first magnetic part also includes a third submagnetic part, one end of which is connected to the first submagnetic part, and the other end extends along the axial direction of the coil assembly to the second submagnetic part.

[0028] In this way, the first magnetic part can form an L-shaped magnetic strip structure, the first sub-magnetic part is located on the side of the inner coil away from the panel, the third sub-magnetic part is located on the radial outer side of the inner coil, and the third sub-magnetic part is located between the first sub-magnetic part and the second sub-magnetic part. Then, through the joint action of the first sub-magnetic part and the third sub-magnetic part, the magnetic field of the inner coil is guided to converge towards the magnetic sensing element, so as to enhance the magnetic field strength acting on the magnetic sensing element.

[0029] In one possible implementation, the second magnetic part further includes a fourth sub-magnetic part, one end of which is connected to the second sub-magnetic part, and the other end of which extends toward the panel along the axial direction of the coil assembly.

[0030] In this way, the second magnetic part can be formed into an L-shaped magnetic strip structure. The second sub-magnetic part is located on the side of the outer coil away from the heating side, and the fourth sub-magnetic part is located on the radial outer side of the outer coil. Then, through the combined action of the second and fourth sub-magnetic parts, the magnetic field of the outer coil is guided to converge towards the top and center of the support, thereby enhancing the magnetic field strength acting on the magnetizing element.

[0031] In one possible implementation, along the radial direction of the coil assembly, the magnetizing element, the third submagnetic part, and the outer coil are arranged sequentially from the inside to the outside, and the end of the third submagnetic part facing away from the first submagnetic part is lower than the outer coil.

[0032] In this way, the third submagnetic part is positioned on the outside of the inner coil facing the outer coil to enhance the reinforcing effect of the third submagnetic part on the inner coil, thereby improving the working efficiency of the inner coil. Furthermore, the third submagnetic part does not extend between the magnetizing element and the outer coil to prevent the third submagnetic part from shielding the magnetic field of the outer coil on the magnetizing element, thereby preventing the third submagnetic part from reducing the working efficiency of the outer coil.

[0033] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the coil and stove provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the stove provided in the embodiments of this application;

[0036] Figure 2 This is a schematic diagram of the structure of the coil disk provided in an embodiment of this application;

[0037] Figure 3 for Figure 2 Exploded view;

[0038] Figure 4 This is a schematic diagram of the structure of the magnetic strip assembly in the coil disk provided in an embodiment of this application;

[0039] Figure 5 Another structural schematic diagram of the magnetic strip assembly in the coil disk provided in the embodiments of this application;

[0040] Figure 6 for Figure 2 Internal structure diagram;

[0041] Figure 7 for Figure 6 A magnified view of the area within the dashed circle;

[0042] Figure 8 This is a schematic diagram of the structure of the coil assembly in the coil disk provided in the embodiments of this application;

[0043] Figure 9 for Figure 2 Top view;

[0044] Figure 10 This is a schematic diagram of the structure of the support in the coil disk provided in an embodiment of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100 - Panel; 200 - Bracket; 210 - First mounting part; 211 - First mounting hole; 212 - First limiting surface; 213 - First wire groove; 220 - Second mounting part; 221 - Second mounting hole; 222 - Second limiting surface; 223 - Second wire groove; 300 - Coil assembly; 310 - Inner coil; 320 - Outer coil; 400 - Magnetic strip assembly; 410 - First magnetic part; 410a - First sub-magnetic part; 411 - First surface; 410b - Third sub-magnetic part; 410c - Fifth sub-magnetic part; 420 - Second magnetic part; 420a - Second sub-magnetic part; 421 - Second surface; 420b - Fourth sub-magnetic part; 500 - Magnetic sensing element; 600 - Heat insulation element. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0051] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or display that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or display.

[0052] In view of the above problems, this application provides a stove in which the second surface of the second magnetic part is positioned close to the pot relative to the first surface of the first magnetic part, and a first gap is formed between them, so that the second magnetic part can guide the magnetic field to converge towards the magnetic sensing element, thereby increasing the magnetic field strength on the outer side of the magnetic sensing element, thereby optimizing the magnetic field distribution of the stove and reducing the deformation of the magnetic sensing element.

[0053] The specific implementation methods of the coil and stove provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0054] Reference Figures 1 to 5 As shown in the figure, this application provides a stove, which can be an induction cooker or an induction stove, etc. This application does not limit this.

[0055] The stove in this embodiment includes a housing and a coil. The coil is installed inside the housing. The housing may include a panel 100, which is configured to contact the cookware. The coil has a heating side, which is the side of the coil facing the cookware, so that the coil can heat the cookware.

[0056] The coil disk includes a support 200, a coil assembly 300, a magnetic strip assembly 400, and a magnetic sensing element 500. The coil assembly 300 is wound around the support 200 and includes an inner coil 310 and an outer coil 320 wound coaxially.

[0057] The magnetic sensing element 500 is provided on the support 200. The magnetic sensing element 500 is located on the side of the inner coil 310 facing the cookware and is located radially inside the outer coil 320. The magnetic sensing element 500 is configured to heat the cookware under the magnetic field of the inner coil 310 and the outer coil 320.

[0058] The magnetic strip assembly 400 is disposed on the bracket 200, at least a portion of the magnetic strip assembly 400 is located on the side of the coil assembly 300 away from the panel 100, and at least a portion of the magnetic strip assembly 400 is located on the outside of the coil assembly 300.

[0059] The magnetic strip assembly 400 includes a first magnetic portion 410 and a second magnetic portion 420 disposed radially inward and outward along the coil assembly 300. The second magnetic portion 420 is located outside the first magnetic portion 410. The first magnetic portion 410 is disposed corresponding to the inner coil 310, and the second magnetic portion 420 is disposed corresponding to the outer coil 320. The first magnetic portion 410 has a first surface 411 on the side facing the panel 100, and the second magnetic portion 420 has a second surface 421 on the side facing the panel 100.

[0060] Along the axial direction of the coil assembly 300, the second surface 421 is disposed close to the panel 100 relative to the first surface 411, and there is a first gap T1 between the second surface 421 and the first surface 411.

[0061] In this embodiment, to address the issue that traditional induction cookers cannot directly heat non-magnetic cookware, the coil may further include a magnetic sensing element 500. This element 500 is made of a magnetically conductive material and can generate eddy currents in a magnetic field, thereby generating heat. This heat is then transferred to the non-magnetic cookware (such as ceramic pots or earthenware pots) through thermal radiation, thus heating the food inside. This overcomes the limitations imposed by cookware materials, thereby improving the versatility of the cooker.

[0062] It should be understood that regardless of whether the cookware is magnetic or non-magnetic, the heat from the magnetic induction element 500 can be conducted to the cookware, thereby heating it. When the cookware is magnetic, the magnetic field of the outer coil 320 can act on the magnetic induction element 500, thereby heating the cookware through the magnetic induction element 500. Furthermore, the magnetic field of the outer coil 320 can also act on the cookware, causing it to generate heat on its own. Thus, electromagnetic heating and infrared radiation heating work together to improve the heating effect of the magnetic cookware.

[0063] Specifically, the stove may include a panel 100, which provides a support surface for the cookware so that it sits stably on the stove. A bracket 200 is used to mount the coil assembly 300 and the magnetic strip assembly 400, thereby integrating the coil assembly 300 and the magnetic strip assembly 400 together and ensuring the overall stability of the coil.

[0064] The coil assembly 300 generates an alternating magnetic field when energized, which induces eddy currents in the magnetic induction element 500 or the bottom of the magnetic cookware, thereby heating the magnetic induction element 500 or the magnetic cookware. The magnetic strip assembly 400 enhances the magnetic field strength of the coil assembly 300 and forms a shield on the side of the coil assembly 300 facing away from the panel 100 to prevent the magnetic field generated by the coil assembly 300 from radiating downwards towards the cookware, thereby preventing the cookware from heating other magnetic appliances in reverse and improving the electromagnetic compatibility of the cookware.

[0065] Specifically, the coil assembly 300 is disposed on the side of the magnetic strip assembly 400 facing the panel 100 and located inside the magnetic strip assembly 400. In this way, the magnetic strip assembly 400 surrounds the radial outer side of the coil assembly 300, thereby guiding the magnetic field generated by the coil assembly 300 to converge towards the outer side of the magnetic sensing element 500. In addition, the magnetic strip assembly 400 is positioned on the side of the coil assembly 300 away from the panel 100 to guide the magnetic field to converge towards the bottom of the magnetic sensing element 500. Thus, the magnetic strip assembly 400 can optimize the magnetic field distribution of the coil assembly 300, thereby enhancing the magnetic field strength of the coil assembly 300.

[0066] The magnetic strip assembly 400 includes a first magnetic part 410 and a second magnetic part 420. The first magnetic part 410 has a first surface 411 and the second magnetic part 420 has a second surface 421. The first surface 411 and the second surface 421 are both disposed opposite to the coil assembly 300, so that the first magnetic part 410 and the second magnetic part 420 work together to cause the magnetic field to converge towards the magnetic sensing element 500, thereby causing the magnetic field to act more on the cookware or the magnetic sensing element 500.

[0067] Along the radial direction of the coil assembly 300, due to the inner-outer relationship of the first surface 411 and the second surface 421, if the first surface 411 and the second surface 421 are flush, or if the first surface 411 is positioned closer to the panel 100 than the second surface 421, the second magnetic part 420 cannot concentrate the magnetic field. Instead, the second magnetic part 420 will attract the magnetic field to the outside of the support 200. This will result in a weaker magnetic field on the outer side of the magnetic sensing element 500 and a stronger magnetic field at the center of the magnetic sensing element 500. Consequently, the magnetic sensing element 500 is prone to uneven heat generation due to uneven magnetic field distribution, leading to warping, deformation, or even breakage. If the deformation of the magnetic sensing element 500 is severe, the distance between the magnetic sensing element 500 and the inner coil 310, as well as the distance between the outer coil 320 and the magnetic sensing element 500, becomes uneven, which in turn exacerbates the uneven heat generation, further aggravating the deformation of the magnetic sensing element 500.

[0068] Therefore, in this embodiment, along the axial direction of the coil assembly 300, the second surface 421 is positioned close to the panel 100 relative to the first surface 411, and a first gap is formed between the second surface 421 and the first surface 411. This allows the second surface 421 to be higher than the first surface 411, thereby enabling the second magnetic part 420 to guide the magnetic field sensing element 500 to converge, thereby optimizing the magnetic field distribution of the magnetic sensing element 500, improving the temperature uniformity of the magnetic sensing element 500, and improving the heating efficiency of the magnetic sensing element 500, thereby improving the heating effect of the stove or magnetic cookware.

[0069] It should be noted that the coil assembly 300 may include multiple turns of wire. After the wire is wound multiple times in the same direction, a disc-shaped coil assembly 300 can be formed. The winding direction of the coil assembly 300 is its axial direction, and the radial direction of the coil assembly 300 is perpendicular to its axial direction.

[0070] Reference Figure 2 , Figures 6 to 8 As shown, in one possible implementation, the coil assembly 300 includes an inner coil 310 and an outer coil 320 disposed radially inward and outward therefrom, with the outer coil 320 disposed relative to the inner coil 310 close to the panel 100 along the axial direction of the coil assembly 300.

[0071] The first magnetic part 410 is disposed corresponding to the inner coil 310, and the inner coil 310 is located on the side of the first surface 411 facing the panel 100. The second magnetic part 420 is disposed corresponding to the outer coil 320, and the outer coil 320 is located on the side of the second surface 421 facing the panel 100.

[0072] In other words, the inner coil 310 and the outer coil 320 are arranged radially inside and outside the coil assembly 300, and the outer coil 320 and the inner coil 310 are arranged vertically above and below the coil assembly 300. This allows the first magnetic part 410 to be positioned corresponding to the inner coil 310, thereby guiding the inner coil 310 to generate a magnetic field that acts on the bottom of the magnetic sensing element 500. Furthermore, the first magnetic part 410 shields the magnetic field generated by the inner coil 310, preventing the magnetic field from acting on other appliances below the stove, thus improving the electromagnetic compatibility of the stove.

[0073] The second magnetic part 420 is provided corresponding to the outer coil 320. The magnetic field generated by the outer coil 320 is guided by the second magnetic part 420 to converge towards the center of the coil assembly 300, so that the magnetic field generated by the outer coil 320 acts on the outer periphery of the cookware or the magnetic sensing element 500. In this way, the inner coil 310, the outer coil 320, the first magnetic part 410 and the second magnetic part 420 work together to improve the heating effect of the cookware or the magnetic sensing element 500.

[0074] The stove in this embodiment includes a shell and a coil. The shell includes a panel 100, and the coil includes a support 200, a coil assembly 300, a magnetic strip assembly 400, and a magnetic sensing element 500. The magnetic strip assembly 400 includes a first magnetic part 410 and a second magnetic part 420. The first magnetic part 410 includes a first surface 411, and the second magnetic part 420 includes a second surface 421. The panel 100 is provided to support the cookware, so that the cookware sits stably on the stove. The support 200 is provided to install the coil assembly 300, the magnetic strip assembly 400, etc., and integrates the coil assembly 300 and the magnetic strip assembly 400 together. The coil assembly 300 is provided to generate an alternating magnetic field when energized, so that the alternating magnetic field induces eddy currents on the bottom of the magnetic cookware or on the magnetic sensing element 500, thereby causing the magnetic cookware to heat up on its own to heat food, or heating non-magnetic cookware through the magnetic sensing element 500. By providing a first magnetic part 410 and a second magnetic part 420 to work together, the magnetic field is guided to converge toward the magnetic sensing element 500, thereby increasing the magnetic field strength acting on the magnetic sensing element 500. By positioning the second surface 421 close to the panel 100 relative to the first surface 411 and forming a first gap between them, the magnetic field guided by the second magnetic part 420 is prevented from diffusing outward toward the support 200, thus reducing the magnetic field strength on the outer side of the magnetic sensing element 500. In this way, the converging effect of the second magnetic part 420 on the magnetic sensing element 500 can be improved, thereby improving the magnetic field uniformity of the coil assembly 300 and reducing the deformation of the magnetic sensing element 500.

[0075] In some embodiments, the first spacing T1 satisfies: 1 mm ≤ T1 ≤ 30 mm.

[0076] It should be noted that if the first spacing is less than 1 mm, the first surface 411 and the second surface 421 cannot form a significant height difference, which in turn prevents the second magnetic part 420 from effectively guiding the magnetic field around the coil assembly 300 to converge toward the magnetic sensing element 500. If the first spacing is greater than 30 mm, the magnetic strip assembly 400 will be too large in the axial direction of the coil assembly 300, resulting in a larger height of the stove and thus increasing the size of the stove.

[0077] Therefore, in this embodiment, the first spacing is between 1 mm and 30 mm, which allows the second surface 421 to be higher than the first surface 411. This facilitates the second magnetic part 420 to guide the magnetic field around the coil assembly 300 to converge towards the center of the coil assembly 300, thereby enhancing the magnetic field strength at the edge of the magnetic sensing element 500. This results in a more uniform magnetic field strength at various parts of the magnetic sensing element 500 and also helps to control the size of the magnetic strip assembly 400 along the axial direction of the coil assembly 300, thus helping to control the volume of the stove.

[0078] For example, the first spacing can be any one of the values ​​1mm, 4mm, 6mm, 10mm, 20mm, and 30mm, or within any two value ranges.

[0079] Reference Figure 7 As shown, in one possible implementation, along the axial direction of the coil assembly 300, the first surface 411 has a second spacing T2 between the inner coil 310 and the second surface 421 has a third spacing T3 between the outer coil 320 and the inner surface 421.

[0080] It is understandable that the magnetic strip assembly 400 has weak conductivity. If the magnetic strip assembly 400 comes into direct contact with the coil assembly 300, it will cause the coil assembly 300 to be broken down and cause safety problems. Therefore, the first surface 411 and the inner coil 310 are spaced apart, and the second surface 421 and the outer coil 320 are spaced apart to prevent the magnetic strip assembly 400 from causing safety problems with the coil assembly 300.

[0081] In some embodiments, the second spacing T2 satisfies: 0.5 mm ≤ T2 ≤ 5 mm. If the second spacing T2 is less than 0.5 mm, the first surface 411 and the inner coil 310 are too close, which may easily cause safety problems. If the second spacing T2 is greater than 5 mm, the first surface 411 and the inner coil 310 are too far apart, which is not conducive to improving the enhancement effect of the first magnetic part 410 on the magnetic field of the inner coil 310. Therefore, the second spacing T2 is between 0.5 mm and 5 mm, which is beneficial to improving the safety of the inner coil 310 and enhancing the magnetic field strength of the inner coil 310.

[0082] Similarly, in some embodiments, the third spacing T3 satisfies: 0.5 mm ≤ T3 ≤ 5 mm. If the third spacing T3 is less than 0.5 mm, the second surface 421 is too close to the outer coil 320, which may easily cause safety problems. If the third spacing T3 is greater than 5 mm, the second surface 421 is too far from the outer coil 320, which is not conducive to improving the enhancement effect of the magnetic field of the second magnetic part 420 on the outer coil 320. Therefore, the third spacing T3 is between 0.5 mm and 5 mm, which is beneficial to improving the safety of the outer coil 320 and the magnetic field strength of the outer coil 320.

[0083] In one possible implementation, along the axial direction of the coil assembly 300, the orthographic projection of the first magnetic portion 410 at least partially overlaps with the orthographic projection of the inner coil 310.

[0084] This configuration ensures that the first magnetic part 410 and the inner coil 310 are correspondingly arranged, thereby enabling the first magnetic part 410 to effectively enhance the magnetic field of the inner coil 310.

[0085] In some embodiments, along the axial direction of the coil assembly 300, the orthographic projection of the first magnetic portion 410 includes a first projection and a second projection. The first projection is located inside the region enclosed by the outermost ring of the inner coil 310 and overlaps with the orthographic projection of the inner coil 310. The second projection is located outside the region enclosed by the outermost ring of the inner coil 310.

[0086] refer to Figure 9 The projected area of ​​the first projection is the sum of the areas of all the first magnetic parts 410 located within the dotted coil. The projected area S1 of the first projection and the projected area S2 of the region enclosed by the outermost ring of the inner coil 310 satisfy: S1 / S2≥0.3.

[0087] In other words, within the area enclosed by the outermost ring of the inner coil 310, if the projected area of ​​the first magnetic part 410 is small, i.e., S1 / S2 is less than 0.3, the area of ​​the first magnetic part 410 located inside the inner coil 310 is too small. As a result, the temperature of the magnetic sensing element 500 corresponding to the first magnetic part 410 is higher, while the temperature of the magnetic sensing element 500 not corresponding to the first magnetic part 410 is lower, which leads to uneven heating temperature of the magnetic sensing element 500.

[0088] In this embodiment, S1 / S2 needs to be greater than 0.3 to increase the projected area of ​​the first magnetic part 410 inside the inner coil 310, thereby increasing the magnetic field strength and uniformity of the inner coil 310 acting on the magnetic sensing element 500, and thus improving the heating uniformity of the magnetic sensing element 500.

[0089] Reference Figure 4 , Figure 5 and Figure 7In one possible implementation, the first magnetic portion 410 includes a first submagnetic portion 410a, and a first surface 411 is located on the first submagnetic portion 410a. The first submagnetic portion 410a is disc-shaped. Alternatively, a plurality of first submagnetic portions 410a extend radially along the coil assembly 300 and are spaced apart circumferentially along the coil assembly 300.

[0090] With this configuration, the first submagnetic part 410a is positioned corresponding to one axial side of the inner coil 310, so that the first submagnetic part 410a effectively enhances the magnetic field of the inner coil 310. When the first submagnetic part 410a is disc-shaped, S1 / S2=1, thereby effectively increasing the radiation area of ​​the first magnetic part 410 located inside the inner coil 310, and thus effectively improving the heating uniformity of the magnetic sensing element 500.

[0091] Reference Figure 4 , Figure 5 and Figure 7 In one possible implementation, the second magnetic portion 420 includes a plurality of second sub-magnetic portions 420a, and the second surface 421 is located on the second sub-magnetic portions 420a. The plurality of second sub-magnetic portions 420a extend radially along the coil assembly 300 and are spaced apart circumferentially along the coil assembly 300.

[0092] Thus, a plurality of second submagnetic parts 420a are disposed on the outer periphery of the first magnetic part 410, and the second submagnetic parts 420a are disposed corresponding to one axial side of the outer coil 320, so as to guide the magnetic field of the outer coil 320 to converge towards the magnetizing element 500 through the second submagnetic parts 420a.

[0093] Reference Figure 7 As shown, in some embodiments, the first submagnetic part 410a and the second submagnetic part 420a are provided in a one-to-one correspondence. The first magnetic part 410 also includes a third submagnetic part 410b, one end of which is connected to the first submagnetic part 410a, and the other end extends along the axial direction of the coil assembly 300 to the second submagnetic part 420a.

[0094] This configuration allows the first magnetic part 410 to form an L-shaped magnetic strip structure. The first sub-magnetic part 410a is located on the axial side of the inner coil 310 away from the panel 100, and the third sub-magnetic part 410b is located on the radial outer side of the inner coil 310, between the first sub-magnetic part 410a and the second sub-magnetic part 420a. The first sub-magnetic part 410a and the third sub-magnetic part 410b work together to guide the magnetic field of the inner coil 310 to converge towards the bottom of the magnetic sensing element 500, thereby enhancing the magnetic field strength acting on the magnetic sensing element 500.

[0095] Reference Figure 6As shown, in some embodiments, at least a portion of the first magnetic portion 410 further includes a fifth sub-magnetic portion 410c, one end of which is connected to the first sub-magnetic portion 410a, and the other end extends along the axial direction of the coil assembly 300. This allows the first magnetic portion 410 to form a U-shaped magnetic strip structure, better guiding the magnetic field of the inner coil 310 towards the magnetic sensing element 500, thereby enhancing the eddy current effect of the magnetic sensing element 500.

[0096] In one possible implementation, the end of the third submagnetic section 410b that is away from the first submagnetic section 410a is connected to the second submagnetic section 420a.

[0097] In other words, the first magnetic part 410 and the second magnetic part 420 can be bonded or adsorbed together. In this way, when the magnetic strip assembly 400 is installed on the bracket 200, the whole consisting of the first magnetic part 410 and the second magnetic part 420 can be installed on the bracket 200, thereby improving the installation efficiency of the magnetic strip assembly 400.

[0098] Reference Figure 4 , Figure 5 and Figure 7 As shown, in some embodiments, the second magnetic part 420 further includes a fourth sub-magnetic part 420b, one end of which is connected to the second sub-magnetic part 420a, and the other end extends toward the panel 100 along the axial direction of the coil assembly 300.

[0099] In this way, the second magnetic part 420 can be formed into an L-shaped magnetic strip structure. The second sub-magnetic part 420a is located on the side of the outer coil 320 away from the axial direction of the panel 100, and the fourth sub-magnetic part 420b is located on the radial outer side of the outer coil 320. Then, through the combined action of the second sub-magnetic part 420a and the fourth sub-magnetic part 420b, the magnetic field of the outer coil 320 is guided to converge toward the magnetic sensing element 500, so as to enhance the magnetic field strength acting on the cookware or the magnetic sensing element 500.

[0100] Reference Figure 10 As shown, in one possible implementation, the bracket 200 includes a first mounting portion 210 and a second mounting portion 220 connected internally and externally. The first mounting portion 210 has a first mounting hole 211, and the second mounting portion 220 has a second mounting hole 221. Both the first mounting hole 211 and the second mounting hole 221 extend along the axial direction of the coil assembly 300. At least a portion of the first magnetic portion 410 is inserted into the first mounting hole 211, and at least a portion of the second magnetic portion 420 is inserted into the second mounting hole 221.

[0101] In this way, the first magnetic part 410 can be fixed to the bracket 200 through the first mounting hole 211, and the second magnetic part 420 can be fixed to the bracket 200 through the second mounting hole 221, thereby installing the magnetic strip assembly 400 to the bracket 200.

[0102] For example, after the third submagnetic part 410b is inserted into the first mounting hole 211, it is then bonded to the first mounting part 210 using adhesive, thereby fixing the first magnetic part 410 to the bracket 200. After the fourth submagnetic part 420b is inserted into the second mounting hole 221, it is then bonded to the second mounting part 220 using adhesive, thereby fixing the second magnetic part 420 to the bracket 200.

[0103] Reference Figure 7 As shown, in one possible implementation, the first mounting portion 210 has a first limiting surface 212, which is connected to one end of the first mounting hole 211 away from the panel 100, and the first surface 411 abuts against the first limiting surface 212. The second mounting portion 220 has a second limiting surface 222, which is connected to one end of the second mounting hole 221 away from the panel 100, and the second surface 421 abuts against the second limiting surface 222. A first distance T1 is provided between the first limiting surface 212 and the second limiting surface 222.

[0104] In other words, when the magnetic strip assembly 400 is installed onto the bracket 200, after the first magnetic part 410 is inserted, the first surface 411 abuts against the first limiting surface 212, and after the second magnetic part 420 is inserted, the second surface 421 abuts against the second limiting surface 222. Thus, when the first magnetic part 410 and the second magnetic part 420 are respectively installed onto the bracket 200, the first limiting surface 212 and the second limiting surface 222 can ensure that there is a first gap between the first surface 411 and the second surface 421.

[0105] Reference Figure 7 and Figure 10 As shown, in one possible implementation, the first mounting part 210 is provided with a first wire groove 213, and the inner coil 310 is wound around the first wire groove 213. The bottom surface of the first wire groove 213 facing the first limiting surface 212 has a second distance T2 between it and the first limiting surface 212.

[0106] The second mounting part 220 is provided with a second wire groove 223, and the outer coil 320 is wound around the second wire groove 223. The bottom surface of the second wire groove 223 facing the second limiting surface 222 has a third distance T3 between it and the second limiting surface 222.

[0107] With this configuration, when the inner coil 310 is wound in the first wire groove 213 and the first surface 411 abuts against the first limiting surface 212, a second gap can be ensured between the inner coil 310 and the first surface 411. When the outer coil 320 is wound in the second wire groove 223 and the second surface 421 abuts against the second limiting surface 222, a second gap can be ensured between the outer coil 320 and the second surface 421.

[0108] Reference Figures 1 to 3 As shown, in one possible implementation, along the radial direction of the coil assembly 300, the magnetic sensing element 500, the third submagnetic part 410b, the outer coil 320, and the second magnetic part 420 are arranged sequentially from the inside to the outside.

[0109] Since the magnetic strip assembly 400 cannot be disposed between the outer surface of the magnetic sensing element 500 and the outer coil 320 to prevent the magnetic strip assembly 400 from shielding the magnetic field of the outer coil 320 on the magnetic sensing sheet, which would reduce the working efficiency of the outer coil 320, the outer coil 320 is disposed between the magnetic sensing element 500 and the second magnetic part 420 in the radial direction of the coil assembly 300, and the third sub-magnetic part 410b is disposed between the magnetic sensing element 500 and the outer coil 320. Furthermore, the third sub-magnetic part 410b does not extend between the outer coil 320 and the magnetic sensing element 500 to enhance the reinforcing effect of the second magnetic part 420 on the outer coil 320, thereby improving the working efficiency of the outer coil 320.

[0110] In some embodiments, the stove further includes a heat insulation element 600 located between the inner coil 310 and the magnetic sensing element 500, and between the outer coil 320 and the magnetic sensing element 500, to prevent the heating of the magnetic sensing element 500 from affecting the coil assembly 300.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A coil disk, characterized in that, The coil has a heating side, and the coil includes: Bracket (200); A coil assembly (300) is disposed on the bracket (200), the coil assembly (300) including an inner coil (310) and an outer coil (320) arranged coaxially; A magnetic sensing element (500) is provided on the bracket (200). The magnetic sensing element (500) is located on the side of the inner coil (310) facing the heating side and is located radially inside the outer coil (320). The magnetic sensing element (500) is configured to generate heat under the magnetic field of the inner coil (310) and the outer coil (320). A magnetic strip assembly (400) is disposed on the bracket (200). The magnetic strip assembly (400) includes a first magnetic part (410) and a second magnetic part (420) arranged radially along the coil assembly (300). The second magnetic part (420) is located outside the first magnetic part (410). The first magnetic part (410) is disposed corresponding to the inner coil (310), and the second magnetic part (420) is disposed corresponding to the outer coil (320). The first magnetic part (410) has a first surface (411) on the side facing the inner coil (310), and the second magnetic part (420) has a second surface (421) on the side facing the outer coil (320). Along the axial direction of the coil assembly (300), the second surface (421) is disposed close to the heating side relative to the first surface (411), and there is a first distance T1 between the second surface (421) and the first surface (411).

2. The coil disk according to claim 1, characterized in that, The first spacing T1 satisfies: 1 mm ≤ T1 ≤ 30 mm.

3. The coil disk according to claim 1 or 2, characterized in that, Along the axial direction of the coil assembly (300), the first surface (411) has a second spacing T2 between the inner coil (310) and the second surface (421) has a third spacing T3 between the outer coil (320).

4. The coil disk according to claim 3, characterized in that, The second spacing T2 satisfies: 0.5 mm ≤ T2 ≤ 5 mm; And / or, the third spacing T3 satisfies: 0.5 mm ≤ T3 ≤ 5 mm.

5. The coil disk according to claim 1 or 2, characterized in that, Along the axial direction of the coil assembly (300), at least a portion of the orthographic projection of the first magnetic part (410) lies within the area enclosed by the outermost ring of the inner coil (310); The projected area S1 of all the first magnetic parts (410) within the region enclosed by the outermost ring of the inner coil (310) and the projected area S2 of the region enclosed by the outermost ring of the inner coil (310) satisfy: S1 / S2≥0.

3.

6. The coil disk according to claim 1 or 2, characterized in that, The first magnetic part (410) includes a first sub-magnetic part (410a), and the first surface (411) is located on the first sub-magnetic part (410a). The first submagnetic part (410a) is disc-shaped; or, a plurality of the first submagnetic parts (410a) extend radially along the coil assembly (300) and are spaced apart circumferentially along the coil assembly (300).

7. The coil disk according to claim 6, characterized in that, The second magnetic part (420) includes a plurality of second sub-magnetic parts (420a), and the second surface (421) is located on the second sub-magnetic part (420a). Several second submagnetic portions (420a) extend radially along the coil assembly (300) and are spaced circumferentially along the coil assembly (300).

8. The coil disk according to claim 7, characterized in that, The first submagnetic part (410a) and the second submagnetic part (420a) are provided in a one-to-one correspondence; The first magnetic part (410) further includes a third sub-magnetic part (410b), one end of which is connected to the first sub-magnetic part (410a), and the other end extends along the axial direction of the coil assembly (300) to the second sub-magnetic part (420a). The second magnetic part (420) further includes a fourth sub-magnetic part (420b), one end of which is connected to the second sub-magnetic part (420a), and the other end extends along the axial direction of the coil assembly (300) in a direction away from the first sub-magnetic part (410a).

9. The coil disk according to claim 8, characterized in that, Along the radial direction of the coil assembly (300), the magnetic sensing element (500), the third submagnetic part (410b) and the outer coil (320) are arranged sequentially from the inside to the outside, and the end of the third submagnetic part (410b) that is away from the first submagnetic part (410a) is lower than the outer coil (320).

10. A stove, characterized in that, It includes a housing and a coil disk as described in any one of claims 1-9, the coil disk being mounted on the housing.

Images