Coil panel and hob

Abstract

The application provides a coil disc and a stove, and relates to the technical field of household appliances. The coil disc comprises a disc body, an electromagnetic coil arranged on the disc body, the electromagnetic coil comprising a first coil and a second coil, and a magnetic induction element arranged on the disc body, the magnetic induction element being located on the side of the first coil facing a pot and on the radially inner side of at least part of the structure of the second coil, and the magnetic induction element being adapted to generate heat under the action of the magnetic induction lines of the first coil and the second coil to heat the pot. The coil disc provided by the application realizes the heating of the pot made of a magnetic conductive material and the pot made of other materials, and improves the versatility of the electromagnetic stove.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and more particularly to a coil and a stove. Background Technology

[0002] An induction cooker is a common cooking appliance with advantages such as high heating efficiency, fast heating speed, and safe use of electric heating.

[0003] Conventional induction cookers utilize the principle of electromagnetic induction eddy current heating. An alternating magnetic field is generated through a coil. When a pot made of magnetic material is placed on the cooktop, the alternating magnetic field cuts through the pot, thereby generating an alternating current (i.e., eddy current) at the bottom of the pot, causing the pot to heat up and thus heating the food.

[0004] However, conventional induction cookers can only heat cookware made of magnetic materials; they cannot heat cookware made of other materials, such as ceramic pots and earthenware pots. Summary of the Invention

[0005] In view of the above problems, this application provides a coil and a stove that enables heating of cookware made of magnetic materials and other materials, thereby improving the versatility of the induction cooker.

[0006] On one hand, this application provides a coil for heating a cookware, the coil comprising: a coil body; an electromagnetic coil disposed on the coil body, the electromagnetic coil including a first coil and a second coil; and a magnetic sensing element disposed on the coil body, the magnetic sensing element being located on the side of the first coil facing the cookware and radially inward of at least a portion of the structure of the second coil, the magnetic sensing element being adapted to generate heat under the action of the magnetic field lines of the first coil and the second coil to heat the cookware.

[0007] The coil of this application, when a non-magnetic cookware is placed above the coil, the magnetic induction element generates a large amount of heat under the electromagnetic action of the first and second coils. The magnetic induction element heats cookware of various materials through thermal radiation or thermal conduction, achieving compatibility with all types of cookware. When a magnetic cookware is placed above the coil, the second coil can directly act on the magnetic cookware, taking advantage of the rapid heating speed of electromagnetic induction heating, allowing the cookware to heat up quickly. In addition, the magnetic induction element also generates a large amount of heat under the action of the first and second coils, heating the cookware through thermal radiation or thermal conduction, taking advantage of its uniform heating, and ensuring stable cookware temperature. Furthermore, the magnetic induction element heats the entire surface, resulting in more uniform heating compared to the heating wires in traditional ceramic cooktops. Moreover, by designing the second coil, an edge magnetic field is added to the magnetic induction element based on the first coil, making the heating of the magnetic induction element more uniform and further improving the heating power of the magnetic induction element.

[0008] In one possible implementation, the plate body is formed with a mounting groove along its own axial direction and facing the opening of the cookware, the first coil and the magnetic sensing element are both disposed in the mounting groove, and the second coil is located outside the mounting groove.

[0009] The mounting slot allows the first coil and the magnetic induction element to be arranged inside the pan, improving space utilization. Furthermore, the placement of the second coil outside the mounting slot helps to maximize its effect on the magnetic induction element, making its heating more efficient. Additionally, the opening of the mounting slot faces the cookware, facilitating direct heat transfer from the magnetic induction element to the cookware and reducing heat loss.

[0010] In one possible implementation, the disk body includes: a first mounting portion and a second mounting portion, the second mounting portion surrounding the periphery of the first mounting portion, and the second mounting portion being higher than the first mounting portion, such that the first mounting portion and the second mounting portion together define the mounting groove, the first coil being disposed in the first mounting portion, and the second coil being disposed in the second mounting portion.

[0011] The design of the second mounting section being higher than the first mounting section forms a mounting groove and defines the height difference between the first and second coils. This height difference helps to better utilize space, making the electromagnetic coil structure more compact. Furthermore, this height difference design also helps improve heat dissipation by increasing the contact area with air, thus aiding in heat dissipation. In addition, the design of the first and second mounting sections enhances the overall structural stability of the coil disc, enabling it to withstand greater loads and more complex working environments.

[0012] In one possible implementation, the first mounting portion has a plurality of first ribs on its surface facing the cookware, the plurality of first ribs being distributed radially spaced along the pan body, and a first groove defining a space between two adjacent ribs, the first coil being wound around the first groove; and / or,

[0013] The second mounting part is further provided with a plurality of second partition ribs distributed radially at intervals along the pan body on the side surface facing the cookware, and a second wire groove is defined between two adjacent second partition ribs, and the second coil is wound in the second wire groove.

[0014] The rib design enhances the structural strength of the pan, enabling it to withstand greater loads and more complex working environments. Through the design of the ribs and wire grooves, the coil can be wound orderly on the pan, avoiding problems such as coil loosening or deformation, thereby improving heating power and stability. In addition, the ribs and wire grooves also help optimize the magnetic field distribution, allowing the magnetic field generated by the coil to act more evenly on the magnetic sensing element and the cookware, thus achieving a more uniform heating effect.

[0015] In one possible implementation, on the side of the plate facing the cookware, the height of the second coil is not lower than the height of the magnetic sensing element.

[0016] This design can make greater use of magnetic field energy, causing the magnetic sensing element to generate more eddy currents, thereby increasing heating power. It also helps to achieve more uniform and rapid heating, reduce heating time, and improve cooking efficiency.

[0017] In one possible implementation, the inner diameter of the second coil is larger than the outer diameter of the first coil, and the projection of the magnetic sensing element in the reference plane is located inside the projection of the second coil in the reference plane, wherein the reference plane is perpendicular to the axis of the disk body.

[0018] This optimizes the distribution of the magnetic field, helping to reduce magnetic field leakage, improve energy transfer efficiency, and minimize unnecessary energy loss. Furthermore, this design also helps to shorten heating time, improve cooking efficiency, and achieve a fast and even heating experience.

[0019] In one possible implementation, the projection of the magnetic sensing element onto the reference plane is located inside the projection of the first coil onto the reference plane.

[0020] This design ensures that the magnetic field lines generated by the first coil primarily pass through the magnetic sensing element, reducing the loss of the magnetic field in the air and allowing more magnetic energy to be converted into heat energy, thereby increasing the heating power. In addition, when the magnetic sensing element is completely located inside the projection of the first coil, the magnetic field lines will pass through the magnetic sensing element more evenly, thus ensuring the uniform distribution of heat on the cookware and guaranteeing the heating effect.

[0021] In one possible implementation, the ratio of the number of strands in the first coil to the number of strands in the second coil is 0.2-5.

[0022] By optimizing the ratio of the number of strands in the first and second coils, the coil can be made to heat the cookware efficiently. This design helps to increase the heating speed and shorten the cooking time. In addition, a reasonable ratio of coil strands also helps to achieve a uniform distribution of heat on the magnetic induction element, improving heating power and reducing the problem of localized overheating caused by concentrated heat.

[0023] In one possible implementation, the magnetic sensing element comprises an iron-chromium-aluminum alloy or a nickel-chromium alloy.

[0024] Iron-chromium-aluminum alloys possess high magnetic permeability and good heat resistance, while nickel-chromium alloys exhibit excellent resistivity, corrosion resistance, and high-temperature stability. This material selection ensures that the coil can efficiently heat different types of cookware, while also maintaining even heat distribution and enhancing cookware compatibility.

[0025] In one possible implementation, the coil disk further includes a heat insulation component disposed within the mounting groove. The heat insulation component includes a first heat insulation portion and a second heat insulation portion, wherein the first heat insulation portion is located between the magnetic sensing element and the first coil, and the second heat insulation portion is located between the magnetic sensing element and the second coil.

[0026] The heat insulation component effectively isolates the high temperatures generated by the magnetic induction element during heating, preventing direct heat transfer to the electromagnetic coil and thus protecting it from damage and extending its lifespan. Furthermore, the heat insulation component also supports the magnetic induction element, ensuring its correct position within the mounting groove and preventing displacement or deformation during heating, thereby maintaining the overall performance and stability of the coil. It also helps reduce lateral heat diffusion and loss, allowing heat to be more concentrated on the cookware for faster heating.

[0027] In one possible implementation, the height of the second heat insulation portion is higher than the height of the magnetic sensing element along the axial direction of the disk body.

[0028] This design better isolates the high temperatures generated by the magnetic induction element during heating, helping to extend the lifespan of the second coil while maintaining the overall stability of the coil's performance. Furthermore, the extended insulation further guides heat upwards, helping to reduce lateral heat diffusion and loss, increasing heating power, and allowing the cookware to reach the desired temperature more quickly.

[0029] In one possible implementation, the coil disk further includes: a first magnetic element disposed on the first mounting portion, at least a portion of the structure of the first magnetic element being located on the side of the first coil opposite to the magnetic sensing element; and a second magnetic element disposed on the second mounting portion, at least a portion of the structure of the second magnetic element being located on the side of the second coil opposite to the magnetic sensing element.

[0030] The introduction of the first and second magnetic components significantly enhances the magnetic field strength inside the coil, increasing eddy current generation and thus improving heating power. Furthermore, by rationally designing the position and shape of the magnetic components, the direction of the magnetic field can be effectively guided, reducing the downward radiation of the magnetic field from the coil, which helps reduce electromagnetic interference and improve electromagnetic compatibility. In addition, the presence of the magnetic components helps optimize heat distribution within the coil; by enhancing the magnetic field strength and guiding its direction, heat can be distributed more evenly, reducing localized overheating and improving heating uniformity and efficiency.

[0031] In one possible implementation, the first magnetic element includes: a first magnetic segment extending radially along the disk body and located on the side of the first coil opposite to the magnetic sensing element; and a second magnetic segment extending axially along the disk body and located radially outside the first coil.

[0032] The combined effect of the first and second magnetic segments significantly enhances the magnetic field strength inside the coil and makes its distribution more uniform, which helps to improve heating power and heating uniformity. In addition, through the rational design of the position and shape of the first and second magnetic segments, the magnetic field radiated downward by the electromagnetic coil is effectively reduced, and the direction of the magnetic field is guided and the magnetic field strength is enhanced, so that heat is distributed more evenly, reducing local overheating and improving heating uniformity and efficiency.

[0033] In one possible implementation, the second magnetic element includes: a third magnetic segment extending axially along the disk body and located radially outside the second coil; and a fourth magnetic segment extending radially along the disk body and located on the side of the second coil opposite to the magnetic sensing element.

[0034] The combined effect of the third and fourth magnetic segments enhances the magnetic field coupling between the coil and the cookware, increasing heating power and allowing the coil to heat the cookware more quickly while reducing energy loss. Furthermore, by rationally designing the position and shape of the third and fourth magnetic segments, the magnetic field distribution inside the coil is more uniform, reducing unnecessary electromagnetic radiation and contributing to improved electromagnetic compatibility.

[0035] In one possible implementation, the first coil includes a plurality of first turns formed by winding, the plurality of first turns being stacked along the axial direction of the disk body.

[0036] The second coil includes a plurality of second coils formed by winding, the plurality of second coils being stacked along the axial direction of the disk body, and the number of second coils being greater than the number of first coils.

[0037] The multi-layered winding and increased number of coils allow the electromagnetic coil to generate a stronger and more uniform magnetic field, thereby increasing heating power and enabling the coil to heat the cookware more quickly, reducing waiting time. The multiple coils stacked axially ensure a more even distribution of heat both axially and radially, helping to reduce localized overheating and improving heating uniformity and comfort. Furthermore, the multi-layered winding and increased number of coils also help reduce electromagnetic interference and improve electromagnetic compatibility.

[0038] On the other hand, this application also provides a stove that includes a coil as described in any of the above possible implementations.

[0039] The stove of this application, by incorporating the aforementioned coil, achieves compatibility with various cookware, improves the stove's versatility, further enhances the heating effect of metal cookware, increases heating power, and ensures the stove's heating stability. Attached Figure Description

[0040] 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.

[0041] Figure 1 This is a schematic diagram of the coil disk structure according to an embodiment of this application;

[0042] Figure 2 This is an exploded view of the coil disk according to an embodiment of this application;

[0043] Figure 3 A cross-sectional view of the coil disk according to an embodiment of this application. Figure 1 ;

[0044] Figure 4 A cross-sectional view of the coil disk according to an embodiment of this application. Figure 2 ;

[0045] Figure 5 This is a diagram showing the heating state of the magnetic induction element when only the first coil is energized in an embodiment of this application.

[0046] Figure 6 This is a diagram showing the heating state of the magnetic induction element when only the second coil is energized in this embodiment of the application.

[0047] Figure 7 This is a diagram showing the heating state of the magnetic induction element when the first coil and the second coil are energized simultaneously in an embodiment of this application.

[0048] Explanation of reference numerals in the attached figures:

[0049] 10-coil disc;

[0050] 100 - Disc body; 100a - Mounting groove; 110 - First mounting part; 111 - First partition rib; 112 - First cable groove; 113 - First receiving groove; 120 - Second mounting part; 121 - Second partition rib; 122 - Second cable groove; 123 - Second receiving groove;

[0051] 200 - Electromagnetic coil; 210 - First coil; 211 - First winding; 220 - Second coil; 221 - Second winding;

[0052] 300-Magnetic Sensing Components;

[0053] 400 - Thermal insulation component; 410 - First thermal insulation section; 420 - Second thermal insulation section;

[0054] 510 - First magnetic component; 511 - First magnetic segment; 512 - Second magnetic segment;

[0055] 520 - Second magnetic component; 521 - Third magnetic segment; 522 - Fourth magnetic segment. Detailed Implementation

[0056] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. 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.

[0057] An induction cooker is a common cooking appliance with advantages such as high heating efficiency, fast heating speed, and safe use of electric heating.

[0058] Conventional induction cookers utilize the principle of electromagnetic induction eddy current heating. An alternating magnetic field is generated through a coil. When a pot made of magnetic material is placed on the cooktop, the alternating magnetic field cuts through the pot, thereby generating an alternating current (i.e., eddy current) at the bottom of the pot, causing the pot to heat up and thus heating the food.

[0059] However, conventional induction cookers can only heat cookware made of magnetic materials; they cannot heat cookware made of other materials, such as ceramic pots and earthenware pots.

[0060] In view of this, this application provides a coil and a cooker. When the electromagnetic coil is energized, the first coil and the second coil generate an alternating magnetic field in the magnetic sensing element. Under the influence of the magnetic field, eddy currents are generated in the magnetic sensing element, and these eddy currents flow inside the magnetic sensing element and generate heat. As the heat accumulates, the magnetic sensing element heats up and transfers the heat to the cooker through thermal conduction. The design of the second coil can be understood as adding an edge magnetic field to the magnetic sensing element based on the first coil, realizing eddy current heating and improving the heating power of the magnetic sensing element.

[0061] Understandably, when a non-magnetic cookware is placed above the coil, the magnetic induction element generates a large amount of heat under the electromagnetic interaction of the first and second coils. This heat is then applied to cookware of various materials via thermal radiation or conduction, achieving compatibility with any type of cookware. When a magnetic cookware is placed above the coil, the second coil acts directly on the cookware, leveraging the rapid heating advantage of electromagnetic induction heating to quickly raise the cookware's temperature. Furthermore, the magnetic induction element also generates a large amount of heat under the influence of the first and second coils, heating the cookware through thermal radiation or conduction, ensuring even heating and stable temperature. Additionally, the magnetic induction element heats the entire surface, resulting in more uniform heating compared to the heating wires in traditional ceramic cooktops. Moreover, the design of the second coil adds an edge magnetic field to the magnetic induction element on top of the first coil, further enhancing its heating uniformity and increasing its heating power.

[0062] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0063] The following will combine Figures 1 to 7 The embodiments of this application will be described below.

[0064] Reference Figure 1 and Figure 2 , Figures 5 to 7 As shown in the embodiment of this application, a coil 10 is provided for heating a cookware. Optionally, the cookware can be a metal cookware or a non-metal cookware.

[0065] The coil disk 10 includes a disk body 100, an electromagnetic coil 200, and a magnetic sensing element 300. The disk body 100 provides a stable support structure and serves as the carrier for the electromagnetic coil 200 and the magnetic sensing element 300, ensuring overall stability and durability.

[0066] An electromagnetic coil 200 is disposed on the disk body 100, and the electromagnetic coil 200 includes a first coil 210 and a second coil 220. The first coil 210 is disposed close to the center of the disk body 100. When energized, the first coil 210 and the second coil 220 will generate a magnetic field in the magnetic sensing element 300, thereby inducing eddy current heating.

[0067] A magnetic induction element 300 is disposed on the plate body 100, located on the side of the first coil 210 facing the cookware, and radially inside at least a portion of the structure of the second coil 220. The magnetic induction element 300 is adapted to generate heat under the action of the magnetic field lines of the first coil 210 and the second coil 220 to heat the cookware. The design of the magnetic induction element 300 improves the heating power and also improves the uniformity of heat conduction, ensuring that the cookware is heated evenly and avoiding problems such as local overheating or underheating.

[0068] Optionally, the magnetic sensing element 300 may be made of a material with high magnetic permeability, such as ferrite or silicon steel sheet, so as to generate heat efficiently under the action of the magnetic field generated by the electromagnetic coil 200.

[0069] Specifically, when the electromagnetic coil 200 is energized, the first coil 210 and the second coil 220 generate an alternating magnetic field in the magnetic sensing element 300. Under the influence of the magnetic field, eddy currents are generated in the magnetic sensing element 300. These eddy currents flow inside the magnetic sensing element 300 and generate heat. As the heat accumulates, the magnetic sensing element 300 heats up and transfers the heat to the cookware through thermal conduction.

[0070] It should be noted that, in combination Figure 5 When only the first coil 210 is energized, it generates a magnetic field on the magnetic sensing element 300, causing the center of the magnetic sensing element 300 to heat up more and the edges to heat up less, which easily leads to uneven heating. For example, the heating power at this time is 1128W.

[0071] Combination Figure 6 When only the second coil 220 is energized, the magnetic flux it generates passes through the magnetic induction element 300. The magnetic induction element 300 cuts the magnetic field lines and generates heat. At this time, the edge of the magnetic induction element 300 generates more heat, and it also has a certain heat-generating effect on the interior. For example, the heating power at this time is 162W.

[0072] And combined Figure 7 When the first coil 210 and the second coil 220 are energized simultaneously, their combined effect ensures uniform heating of the magnetic sensing element 300. More importantly, the mutual coupling of the two windings enhances the magnetic sensing effect of the magnetic sensing element 300; this is not a simple superposition of their power. For example, the heating power increases to 1831W at this time.

[0073] It should be noted that, Figure 5 and Figure 6 This solution is only used for testing purposes. Figure 7 The schematic diagram shows that the first coil 210 and the second coil 220 are not controlled separately. In this design, when heating a pot, simply turning on the power allows the first coil 210 and the second coil 220 to operate simultaneously.

[0074] In existing technologies, there is a combined electromagnetic and electroceramic solution, which is designed for separate control. Specifically, when the cookware is magnetic, the electromagnetic system needs to be energized to achieve heating; when the cookware is non-magnetic, the electroceramic system needs to be energized to achieve heating. This design requires determining the cookware material in advance and then selecting the appropriate control method based on the material. Furthermore, because this solution involves separate control, two control schemes need to be designed, resulting in complex circuit control.

[0075] Compared to existing technologies, this solution eliminates the need to detect the cookware material and simplifies circuit control. Specifically, after placing the cookware on the coil 10, energizing the first coil 210 and the second coil 220 (which can be connected in series or parallel) heats cookware of different materials. The difference lies in the fact that when using magnetic cookware, the second coil 220 can directly heat the cookware while simultaneously heating the magnetic induction element 300, resulting in faster heating and higher thermal power compared to non-magnetic cookware.

[0076] It is evident that the design of the second coil 220 adds an edge magnetic field to the magnetic sensing element 300, which can couple with the first coil 210 to enhance the magnetic sensing effect of the magnetic sensing element 300, realize eddy current heating, and further improve the heating power of the magnetic sensing element 300.

[0077] When a metal cookware is placed on the cookware, and the second coil 220 is energized, eddy currents are generated on the side wall of the cookware under the influence of the magnetic field. This allows for direct electromagnetic heating through the side wall of the cookware, further increasing the heating power.

[0078] In the coil 10 provided in this embodiment, when a non-magnetic cookware is placed above the coil 10, the magnetic induction element 300 generates a large amount of heat under the electromagnetic action of the first coil 210 and the second coil 220. The magnetic induction element 300 heats cookware of various materials by means of thermal radiation or thermal conduction, achieving performance that is not picky about cookware. When a magnetic cookware is placed above the coil 10, the second coil 220 can directly act on the magnetic cookware, taking advantage of the fast heating speed of electromagnetic induction heating, so that the cookware heats up quickly; in addition, the magnetic induction element 300 will also generate a large amount of heat under the action of the first coil 210 and the second coil 220, and heat the cookware by means of thermal radiation or thermal conduction, taking advantage of its uniform heating, so that the temperature of the cookware is stable. In addition, the magnetic sensing element 300 heats the entire surface, which is more uniform than the heating wire in the traditional electric ceramic stove. Furthermore, by designing the second coil 220, an edge magnetic field is added to the magnetic sensing element 300 based on the first coil 210, making the magnetic sensing element 300 heat up more evenly and further improving the heating power of the magnetic sensing element 300.

[0079] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4The plate body 100 has a mounting groove 100a along its own axis and facing the opening of the pot. The first coil 210 and the magnetic sensing element 300 are both located in the mounting groove 100a, and the second coil 220 is located outside the mounting groove 100a.

[0080] The mounting slot 100a allows the first coil 210 and the magnetic sensing element 300 to be arranged inside the pan body 100, improving space utilization. Furthermore, the placement of the second coil 220 outside the mounting slot 100a applies a magnetic field to the edge of the magnetic sensing element 300. Combined with the heating effect of the first coil 210 on the magnetic sensing element 300, this results in more uniform and efficient heating of the magnetic sensing element 300. Additionally, the opening of the mounting slot 100a faces the cookware, facilitating direct heat transfer from the magnetic sensing element 300 to the cookware and reducing heat loss.

[0081] It is evident that the design of the mounting slot 100a optimizes the layout of the electromagnetic coil 200 and the magnetic sensing element 300, improves space utilization and heating power, and enhances the adaptability and compatibility of the coil disc 10.

[0082] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 The plate body 100 includes a first mounting part 110 and a second mounting part 120. The first mounting part 110 is used to carry the first coil 210 and can be located in the central area of ​​the plate body 100, facing the cookware, so as to ensure that the heat can be effectively transferred to the cookware.

[0083] The second mounting portion 120 surrounds the periphery of the first mounting portion 110, and the second mounting portion 120 is higher than the first mounting portion 110, so that the first mounting portion 110 and the second mounting portion 120 together define the mounting groove 100a. Optionally, the second mounting portion 120 may also be provided with a heat dissipation vent to improve heat dissipation and ventilation efficiency, thereby ensuring the stability and reliability of the coil 10 during long-term operation.

[0084] Understandably, the first mounting part 110 and the second mounting part 120 together define a mounting groove 100a facing the opening of the pot. The mounting groove 100a provides a compact and orderly mounting space for the first coil 210 and the magnetic sensing element 300, and also helps to optimize the heating effect.

[0085] The first coil 210 is disposed in the first mounting part 110, and the second coil 220 is disposed in the second mounting part 120.

[0086] Thus, the first coil 210 is located at the bottom of the mounting groove 100a, in close contact with the magnetic sensing element 300. When energized, the first coil 210 generates a magnetic field in the magnetic sensing element 300, thereby inducing eddy current heating. The second coil 220 surrounds the periphery of the first mounting portion 110, located outside the mounting groove 100a but close to the magnetic sensing element 300, and induces eddy current heating on the edge of the magnetic sensing element 300, making the heating of the magnetic sensing element 300 more uniform and efficient. In addition, the second coil 220 can also directly electromagnetically heat metal cookware, improving the heating power.

[0087] The second mounting portion 120, being higher than the first mounting portion 110, forms a mounting groove 100a and defines the height difference between the first coil 210 and the second coil 220. This height difference helps to better utilize space, making the coil disk 10 more compact. Furthermore, this height difference design helps improve heat dissipation by increasing the contact area with air, thus aiding in heat dissipation. In addition, the design of the first mounting portion 110 and the second mounting portion 120 enhances the overall structural stability of the coil disk 10, enabling it to withstand greater loads and more complex working environments.

[0088] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 The first mounting part 110 has a plurality of first partition ribs 111 on the side surface facing the pot. The plurality of first partition ribs 111 are distributed radially at intervals along the plate body 100. A first wire groove 112 is defined between two adjacent partition ribs. The first coil 210 is wound around the first wire groove 112.

[0089] Thus, this design enhances the structural strength of the first mounting section 110 and provides a path for the winding of the first coil 210. The first slot 112 provides space for the winding of the first coil 210, allowing the first coil 210 to be tightly wound within the first slot 112, ensuring a uniform distribution of the magnetic field and efficient heat transfer.

[0090] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 The second mounting part 120 is also provided with a plurality of second partition ribs 121 distributed radially along the pan body 100 on the side surface facing the cookware. A second wire groove 122 is defined between two adjacent second partition ribs 121, and the second coil 220 is wound in the second wire groove 122.

[0091] Similar to the first rib 111, the second rib 121 enhances the structural strength of the second mounting portion 120 and provides a path for the winding of the second coil 220. The second slot 122 provides space for the winding of the second coil 220, allowing the second coil 220 to be tightly wound within the second slot 122, enabling the second coil 220 to work in conjunction with the first coil 210, further optimizing the magnetic field distribution and heating effect.

[0092] As can be seen, the rib design enhances the structural strength of the pan 100, enabling it to withstand greater loads and more complex working environments. Through the design of the ribs and wire grooves, the coil can be wound orderly on the pan 100, avoiding problems such as coil loosening or deformation, thereby improving heating power and stability. Furthermore, the rib and wire groove design also helps optimize the magnetic field distribution, allowing the magnetic field generated by the coil to act more evenly on the magnetic sensing element 300 and the cookware, thus achieving a more uniform heating effect.

[0093] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 On the side of the plate 100 facing the cookware, the height of the second coil 220 is not lower than the height of the magnetic sensing element 300.

[0094] In this way, the design can make greater use of magnetic field energy, causing the magnetizing element 300 to generate more eddy currents, thereby increasing the heating power. It also helps to achieve more uniform and rapid heating, reduce heating time, and improve cooking efficiency.

[0095] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 The inner diameter of the second coil 220 is larger than the outer diameter of the first coil 210. The projection of the magnetic sensing element 300 in the reference plane is inside the projection of the second coil 220 in the reference plane. The reference plane is perpendicular to the axis of the disk body 100.

[0096] In this way, the design ensures that the magnetizing element 300 is fully exposed to the magnetic field generated by the second coil 220, thereby maximizing the use of magnetic field energy for heating.

[0097] By defining the relative positions of the magnetic sensing element 300, the first coil 210, and the second coil 220, the distribution of the magnetic field can be optimized. This design helps reduce magnetic field leakage, improve energy transfer efficiency, and reduce unnecessary energy loss. Furthermore, this design also helps shorten heating time, improve cooking efficiency, and achieve a fast and uniform heating experience.

[0098] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4The projection of the magnetic sensing element 300 in the reference plane is located inside the projection of the first coil 210 in the reference plane.

[0099] It is understandable that the magnetic sensing element 300 is designed to be located on the side of the first coil 210 facing the cookware, and the projection of the magnetic sensing element 300 in the reference plane is located inside the projection of the first coil 210 in the reference plane. This design allows magnetic field energy to be efficiently transmitted from the first coil 210 to the magnetic sensing element 300, which helps to ensure that the magnetic sensing element 300 can fully receive the magnetic field energy, thus realizing the efficient transmission and utilization of magnetic field energy.

[0100] In addition, when magnetic field energy acts on the magnetic sensing element 300, eddy currents will be generated inside the magnetic sensing element 300, thereby generating heat. Due to the positional relationship between the magnetic sensing element 300 and the first coil 210, this heating process can be carried out more efficiently and uniformly.

[0101] This design ensures that the magnetic field lines generated by the first coil 210 mainly pass through the magnetic sensing element 300, reducing the loss of the magnetic field in the air and allowing more magnetic energy to be converted into heat energy, thereby increasing the heating power. In addition, when the magnetic sensing element 300 is completely located inside the projection of the first coil 210, the magnetic field lines will pass through the magnetic sensing element 300 more evenly, thereby ensuring the uniform distribution of heat on the cookware and guaranteeing the heating effect.

[0102] In some embodiments, the ratio of the number of strands in the first coil 210 to the number of strands in the second coil 220 is 0.2-5. Optionally, the ratio can be 0.2, 0.8, 1.5, 2.3, 3.6, 4.8, or 5.

[0103] Through simulation analysis, the optimal ratio range between the number of strands of the first coil 210 and the second coil 220 was determined to be 0.2-5. This ratio range is designed to balance heating power, heat distribution uniformity, and cookware compatibility.

[0104] Understandably, if the number of strands in the second coil (220 strands) is too small, the heating performance at the edges of the magnetic induction element will be weakened, affecting the electromagnetic heating performance of the cookware above, thus reducing the overall heating power. Conversely, if the number of strands in the first coil (210 strands) is too small, the center of the magnetic induction element cannot generate enough heat, while the edges generate too much heat, resulting in uneven heat distribution. Furthermore, the reduction in the overall power of the magnetic induction element will also affect the power output when heating non-metallic cookware.

[0105] Thus, by optimizing the ratio of the number of strands in the first coil 210 to the second coil 220, the coil plate 10 can be ensured to heat the cookware efficiently. This design helps to improve the heating speed and shorten the cooking time. In addition, a reasonable ratio of coil strands also helps to achieve a uniform distribution of heat on the magnetic induction element, improves the heating power, and can also reduce the problem of local overheating caused by concentrated heat.

[0106] The optimized coil design allows the coil 10 to be more widely applicable to different types of cookware, including metal and non-metal cookware, enhancing the versatility and practicality of the coil 10.

[0107] In some embodiments, preferably, the magnetic sensing element 300 comprises an iron-chromium-aluminum alloy or a nickel-chromium alloy.

[0108] Iron-chromium-aluminum alloys possess high magnetic permeability and good heat resistance, while nickel-chromium alloys exhibit good resistivity, corrosion resistance, and high-temperature stability. This material selection ensures that the coil 10 can efficiently heat different types of cookware, while also maintaining uniform heat distribution and enhancing cookware compatibility.

[0109] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 The coil disk 10 also includes a heat insulation component 400, which is disposed in the mounting groove 100a. The heat insulation component 400 includes a first heat insulation part 410 and a second heat insulation part 420. The first heat insulation part 410 is located between the magnetic sensing component 300 and the first coil 210, and the second heat insulation part 420 is located between the magnetic sensing component 300 and the second coil 220.

[0110] Optionally, the material of the insulation component 400 may include ceramic fiber, aluminum silicate fiber, aerogel, etc., which have high thermal resistance, low density and good chemical stability.

[0111] Understandably, the heat insulation component 400 can effectively isolate the high temperature generated by the magnetic sensing component 300 during the heating process, preventing heat from being directly transferred to the electromagnetic coil 200, thereby protecting the electromagnetic coil 200 from high temperature damage and extending its service life.

[0112] In addition, the heat insulation component 400 also serves to support the magnetic sensing component 300. Through a stable support structure, it ensures that the magnetic sensing component 300 maintains the correct position in the mounting groove 100a, preventing it from shifting or deforming during the heating process, thereby maintaining the overall performance and stability of the coil disk 10.

[0113] The design of the heat insulation component 400 also takes into account the direction of heat transfer. Through reasonable material selection and structural design, the heat insulation component 400 can guide the heat generated on the magnetic sensing component 300 to be transferred upward, that is, towards the cookware, thereby improving the heating power. This design helps to reduce the lateral diffusion and loss of heat, so that the heat is more concentrated on the cookware and achieves rapid heating.

[0114] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4Along the axial direction of the disk body 100, the height of the second heat insulation part 420 is higher than the height of the magnetic sensing element 300.

[0115] Understandably, this design means that the second heat insulation section 420 covers the direct contact area between the magnetic sensing element 300 and the second coil 220, and extends upwards by a certain distance. This better isolates the high temperatures generated by the magnetic sensing element 300 during heating, helping to extend the service life of the second coil 220 while maintaining the overall performance stability of the coil disk 10.

[0116] In addition, the extended insulation section further guides heat upward, which helps reduce lateral heat diffusion and loss, improves heating power, and allows the cookware to reach the required temperature more quickly.

[0117] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 The coil disk 10 also includes a first magnetic element 510 and a second magnetic element 520.

[0118] The first magnetic element 510 is disposed on the first mounting portion 110, and at least a portion of the structure of the first magnetic element 510 is located on the side of the first coil 210 opposite to the magnetic induction element 300. The magnetic properties of the first magnetic element 510 enhance the magnetic field strength around the first coil 210. Furthermore, since it is located on the side of the first coil 210 opposite to the magnetic induction element 300, it helps guide the direction of the magnetic field and reduces downward radiated magnetic fields.

[0119] The second magnetic element 520 is disposed on the second mounting portion 120, and at least a portion of the structure of the second magnetic element 520 is disposed on the side of the second coil 220 facing away from the magnetic sensing element 300. Similar to the first magnetic element 510, the second magnetic element 520 enhances the magnetic field strength around the second coil 220 and guides the direction of the magnetic field, reducing the downward radiated magnetic field.

[0120] Optionally, the first mounting portion 110 is provided with a first receiving groove 113 for accommodating the first magnetic component 510, and the second mounting portion 120 is provided with a second receiving groove 123 for accommodating the second magnetic component 520. The first magnetic component 510 is engaged in the first receiving groove 113, and the second magnetic component 520 is engaged in the second receiving groove 123. The first receiving groove 113 and the second receiving groove provide mounting positions for the first magnetic component 510 and the second magnetic component 520, ensuring the installation stability of the first magnetic component 510 and the second magnetic component 520.

[0121] It is evident that the introduction of the first magnetic component 510 and the second magnetic component 520 significantly enhances the magnetic field strength inside the coil disk 10, increases eddy current generation, and thus improves heating power. Furthermore, by rationally designing the position and shape of the magnetic components, the direction of the magnetic field can be effectively guided, reducing the downward radiated magnetic field from the coil, which helps to reduce electromagnetic interference and improve electromagnetic compatibility.

[0122] In addition, the design of the first magnetic element 510 and the second magnetic element 520 helps to optimize the heat distribution inside the coil disk 10. By enhancing the magnetic field strength and guiding the magnetic field direction, heat can be distributed more evenly, reducing local overheating and improving the uniformity and efficiency of heating.

[0123] In some embodiments, combined with Figure 2 The first magnetic element 510 includes a first magnetic segment 511 and a second magnetic segment 512.

[0124] The first magnetic segment 511 extends radially along the disk body 100 and is located on the side of the first coil 210 opposite to the magnetic sensing element 300. The second magnetic segment 512 extends axially along the disk body 100 and is located radially outside the first coil 210.

[0125] Understandably, the first magnetic segment 511 enhances the radial magnetic field strength around the first coil 210 through its magnetic properties, which helps guide the direction of the magnetic field so that more magnetic lines of force can pass through the magnetizing element 300, thereby increasing the heating power. In addition, since the first magnetic segment 511 is located on the side of the coil away from the magnetizing element 300, it also helps to reduce the downward radiating magnetic field.

[0126] The second magnetic segment 512 mainly serves to optimize the magnetic field distribution and heat distribution. Through its axially extended structure, the second magnetic segment 512 can guide the magnetic field to be distributed more evenly in the axial direction, reducing local overheating. In addition, the second magnetic segment 512 also helps to further reduce the downward radiated magnetic field and improve electromagnetic compatibility.

[0127] Thus, the combined effect of the first magnetic segment 511 and the second magnetic segment 512 significantly enhances the magnetic field strength inside the coil disk 10 and makes its distribution more uniform, which helps to improve the heating power and heating uniformity. In addition, through the reasonable design of the position and shape of the first magnetic segment 511 and the second magnetic segment 512, the magnetic field radiated downward by the electromagnetic coil 200 is effectively reduced, and the direction of the magnetic field is guided and the magnetic field strength is enhanced, so that the heat is distributed more evenly, reducing local overheating and improving the uniformity and efficiency of heating.

[0128] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4The second magnetic element 520 includes a third magnetic segment 521 and a fourth magnetic segment 522.

[0129] The third magnetic segment 521 extends along the axial direction of the disk body 100 and is located on the radial outer side of the second coil 220. The fourth magnetic segment 522 extends along the radial direction of the disk body 100 and is located on the side of the second coil 220 opposite to the magnetic sensing element 300.

[0130] Understandably, the main function of the third magnetic segment 521 is to enhance and guide the magnetic field around the radial periphery of the coil, while the main function of the fourth magnetic segment 522 is to enhance the magnetic field coupling between the coil and the cookware.

[0131] Specifically, the third magnetic segment 521 helps to guide the magnetic field to be distributed more evenly in the axial direction, thereby enhancing the overall magnetic field strength of the coil disk 10. In addition, it can also reduce the downward radiated magnetic field of the coil to a certain extent and improve electromagnetic compatibility.

[0132] The fourth magnetic segment 522, through its radially extending structure, can guide more magnetic lines of force through the cookware, thereby increasing the heating power. In addition, due to its close position to the cookware, it also helps to reduce the leakage of the magnetic field under the cookware, further reducing electromagnetic interference.

[0133] It is evident that the combined effect of the third magnetic segment 521 and the fourth magnetic segment 522 enhances the magnetic field coupling between the coil and the cookware, increasing the heating power and enabling the coil 10 to heat the cookware more quickly while reducing energy loss. Furthermore, by rationally designing the position and shape of the third magnetic segment 521 and the fourth magnetic segment 522, the magnetic field distribution inside the coil 10 is more uniform, reducing unnecessary electromagnetic radiation and contributing to improved electromagnetic compatibility.

[0134] The design of the third magnetic segment 521 and the fourth magnetic segment 522 also helps to improve the uniformity of heating. By guiding the direction of the magnetic field and enhancing the magnetic field strength, the coil 10 can distribute heat more evenly, reduce local overheating, and thus provide a better cooking experience.

[0135] In some embodiments, combined with Figure 2 , Figure 3 and Figure 4 The first coil 210 includes multiple first coils 211 formed by winding, and the multiple first coils 211 are stacked along the axial direction of the disk body 100. The multi-layered first coil 210 can generate a more uniform and powerful magnetic field, thereby increasing the heating power. In addition, since the multiple coils are stacked in the axial direction, they can work together on the magnetic sensing element 300, so that the magnetic lines of force pass through the magnetic sensing element 300 more densely, generating more eddy currents and heat.

[0136] The second coil 220 includes multiple second coils 221 formed by winding, which are stacked along the axial direction of the disk 100. The number of second coils 221 is greater than the number of first coils 211. Compared with the first coil 210, the second coil 220 has more coils, which further enhances its electromagnetic performance. It can be understood that more coils mean more magnetic lines of force can pass through the magnetizing element 300, thereby generating more heat.

[0137] It is understandable that each turn of the coil around the central axis of the disc 100 forms a layer, and adjacent layers are connected and distributed along the axial direction of the disc 100. Thus, the first coil 210 has multiple first layers 211, and the second coil 220 has multiple second layers 221. It is evident that the multi-layered winding and increased number of layers allow the electromagnetic coil 200 to generate a stronger and more uniform magnetic field, thereby increasing the heating power and enabling the coil disc 10 to heat the cookware more quickly, reducing waiting time.

[0138] The stacking of multiple coils along the axial direction allows for a more uniform heat distribution both axially and radially, helping to reduce localized overheating and improve heating uniformity and comfort. Furthermore, the multi-layered winding and increased number of coils also help reduce electromagnetic interference and improve electromagnetic compatibility.

[0139] In addition, this application embodiment also provides a stove, including the coil 10 in any of the above embodiments. Optionally, the stove may be an induction cooker, an electric ceramic cooker, a built-in stove, etc.

[0140] By incorporating the aforementioned coil 10 into the stove, the stove achieves compatibility with various cookware types, improving its versatility. It also further enhances the heating effect of metal cookware, increases heating power, and ensures the stove's heating stability.

[0141] In some embodiments, the stove also includes a control system connected to the electromagnetic coil 200. It is understood that, compared to conventional technologies where electromagnetic heating and heat conduction require two separate systems to control electromagnetic and heat conduction independently, the stove provided in this application uses only one control system to achieve both electromagnetic and heat conduction heating methods. This simplifies control, reduces the number of mainboard components, and lowers production costs.

[0142] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0143] It should be noted that the embodiments referred to in the specification, such as "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments," may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0144] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0145] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0146] 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 for heating cookware, characterized in that, The coil disk includes: Disk body; An electromagnetic coil is disposed on the disk body, and the electromagnetic coil includes a first coil and a second coil; A magnetic sensing element is disposed on the plate body, the magnetic sensing element being located on the side of the first coil facing the cookware and radially inside at least a portion of the structure of the second coil, the magnetic sensing element being adapted to generate heat under the action of the magnetic field lines of the first coil and the second coil to heat the cookware.

2. The coil disk according to claim 1, characterized in that, The plate body has a mounting groove along its own axis and facing the opening of the pot. The first coil and the magnetic sensing element are both disposed in the mounting groove, and the second coil is located outside the mounting groove.

3. The coil disk according to claim 2, characterized in that, The disc body includes a first mounting portion and a second mounting portion, the second mounting portion surrounding the periphery of the first mounting portion, and the second mounting portion being higher than the first mounting portion, so that the first mounting portion and the second mounting portion together define the mounting groove. The first coil is disposed in the first mounting part, and the second coil is disposed in the second mounting part.

4. The coil disk according to claim 3, characterized in that, The first mounting portion has a plurality of first ribs on the side surface facing the cookware. The plurality of first ribs are distributed radially at intervals along the plate body, and a first groove is defined between two adjacent ribs. The first coil is wound in the first groove; and / or, The second mounting part is further provided with a plurality of second partition ribs distributed radially at intervals along the pan body on the side surface facing the cookware, and a second wire groove is defined between two adjacent second partition ribs, and the second coil is wound in the second wire groove.

5. The coil disk according to claim 1, characterized in that, On the side of the plate facing the cookware, the height of the second coil is not lower than the height of the magnetic sensing element.

6. The coil disk according to claim 1, characterized in that, The inner diameter of the second coil is larger than the outer diameter of the first coil, and the projection of the magnetic sensing element in the reference plane is inside the projection of the second coil in the reference plane. The reference plane is perpendicular to the axis of the disk body.

7. The coil disk according to claim 6, characterized in that, The projection of the magnetic sensing element onto the reference plane is located inside the projection of the first coil onto the reference plane.

8. The coil disk according to claim 1, characterized in that, The ratio of the number of strands in the first coil to the number of strands in the second coil is 0.2-5.

9. The coil disk according to claim 1, characterized in that, The magnetic sensing element includes an iron-chromium-aluminum alloy component or a nickel-chromium alloy component.

10. The coil disk according to claim 2, characterized in that, Also includes: A heat insulation component is disposed in the mounting groove. The heat insulation component includes a first heat insulation part and a second heat insulation part. The first heat insulation part is located between the magnetic sensing element and the first coil, and the second heat insulation part is located between the magnetic sensing element and the second coil.

11. The coil disk according to claim 10, characterized in that, Along the axial direction of the disk, the height of the second heat insulation portion is higher than the height of the magnetic sensing element.

12. The coil disk according to claim 3, characterized in that, Also includes: A first magnetic element is disposed on the first mounting portion, and at least a portion of the structure of the first magnetic element is located on the side of the first coil opposite to the magnetic sensing element. The second magnetic element is disposed in the second mounting portion, and at least a portion of the structure of the second magnetic element is disposed on the side of the second coil opposite to the magnetic sensing element.

13. The coil disk according to claim 12, characterized in that, The first magnetic component includes: The first magnetic segment extends radially along the disk body and is located on the side of the first coil opposite to the magnetic sensing element. The second magnetic segment extends axially along the disk body and is located radially outside the first coil.

14. The coil disk according to claim 12, characterized in that, The second magnetic component includes: The third magnetic segment extends along the axial direction of the disk body and is located radially outside the second coil; The fourth magnetic segment extends radially along the disk body and is located on the side of the second coil opposite to the magnetic sensing element.

15. The coil disk according to claim 1, characterized in that, The first coil includes a plurality of first turns formed by winding, and the plurality of first turns are stacked along the axial direction of the disk. The second coil includes a plurality of second coils formed by winding, the plurality of second coils being stacked along the axial direction of the disk body, and the number of second coils being greater than the number of first coils.

16. A stove, characterized in that, include: The coil disc according to any one of claims 1-15.

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