Coil structure and cooking utensil

Abstract

The invention discloses a coil structure and a cooking utensil, the coil structure comprises a body and a plurality of coil units, and the body is provided with a first side and a second side which are opposite to each other; the plurality of coil units comprise a first coil unit and a second coil unit, the first coil unit comprises a plurality of turns of coils, each turn of coil comprises a first wire section and a second wire section which are connected with each other and opposite in current direction, each turn of coil is wound on the first side and the second side of the body, and the first wire section and the second wire section are connected with each other. The first coil is arranged on the first side of the body so that the first wire sections can be arranged on the first side of the body, the second wire sections can be arranged on the second side of the body, and the second coil is arranged on the first side of the body. When the coil structure provided by the invention is used for heating the heating container, a wider area at the bottom of the heating container can be heated, and the coil structure can extend towards the side wall part of the cookware so as to heat the side part of the cookware.

Description

[0001] Priority information

[0002] This application claims priority to the Chinese invention patent application filed on October 27, 2023, with application number 202311417141.9 and title “Electromagnetic Heating Structure and Electromagnetic Heating Cooking Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present invention relates to the technical field of cooking utensils, and in particular to a coil structure and a cooking utensil. Background Art

[0004] The electromagnetic heating cooking device is used to heat a heating container such as a cooker through an electromagnetic heating coil. Usually, the heating coverage area is the area projected on the bottom of the cooker by the electromagnetic heating coil. The area beyond the electromagnetic heating coil, such as the pot wall, cannot be heated. When the pot wall is adjusted to heat the pot wall, the heating of the bottom projection area of ​​the cooker will be weakened. Therefore, a heating structure is urgently needed to solve the above problem. Summary of the invention

[0005] The main purpose of the present invention is to propose a coil structure and a cooking utensil, aiming to provide a coil structure that can heat a wider area of ​​the bottom of the heating container when heating the heating container, and can extend to the side wall of the pot to heat the side of the pot.

[0006] To achieve the above object, the present invention provides a coil structure, wherein the coil structure comprises:

[0007] a body having opposing first and second sides; and,

[0008] A plurality of coil units include a first coil unit and a second coil unit, wherein the first coil unit includes a plurality of turns of coils, each turn of the coils includes a first wire segment and a second wire segment that are connected to each other and have opposite current directions, each turn of the coils is wound around a first side and a second side of the body, so that the first side of the body has a plurality of the first wire segments, the second side of the body has a plurality of the second wire segments, and the second coil is arranged on the first side of the body.

[0009] Optionally, a plurality of the first coil units are provided.

[0010] Optionally, a plurality of the first coil units and the second coil units are connected in series to form a coil group.

[0011] Optionally, a plurality of the first coil units are connected in series to form a coil group, and the coil group is connected in parallel with the second coil unit.

[0012] Optionally, some of the first coil units are connected in series to form a coil group, and another part are connected in series to form another coil group, and the two coil groups and the second coil unit are connected in parallel.

[0013] Optionally, the coil units in the coil group are connected via a connecting structure.

[0014] Optionally, the connection structure includes a terminal screw locking structure, a riveting structure or a terminal plug-in structure.

[0015] Optionally, the second coil unit is located in the middle of the first side of the body;

[0016] The plurality of first coil units are located at the periphery of the second coil unit and distributed along the circumference of the first side of the body.

[0017] Optionally, the first side of the body includes an inner ring where the second coil unit is located, and an outer ring where the first coil unit is located:

[0018] Wherein, the diameter of the inner ring is R1, then R1≤230mm; and / or,

[0019] The diameter of the outer ring is R2, then R2≤300mm.

[0020] Optionally, the coil structure further includes a magnet, and the magnet is at least partially located between the first wire segment and the second wire segment.

[0021] Optionally, an angle between a projection of the magnet on the first side and the first wire segment is α, and 10°≤α≤90°.

[0022] Optionally, the main body includes a first split body and a second split body arranged on both sides of the magnet.

[0023] Optionally, the first coil unit is arranged flat to have a thickness direction;

[0024] The first wire segment and the second wire segment are located in a thickness direction of the first coil unit.

[0025] Optionally, a distance between the first coil unit and the end of the second coil unit facing away from the second side in the thickness direction is h, and h≤20 mm.

[0026] Optionally, a distance between two adjacent coil units is L, and 0mm≤L≤50mm.

[0027] The present invention also proposes a cooking utensil, wherein the cooking utensil includes a coil structure, the coil structure includes a main body and a plurality of coil units, the main body has a first side and a second side opposite to each other; the plurality of coil units include a first coil unit and a second coil unit, the first coil unit includes a plurality of turns of coil, each turn of the coil includes a first wire segment and a second wire segment that are connected to each other and have opposite current directions, each turn of the coil is wound around the first side and the second side of the main body, so that the first side of the main body has a plurality of the first wire segments, the second side of the main body has a plurality of the second wire segments, and the second coil is arranged on the first side of the main body.

[0028] Optionally, the magnetic field generated by the plurality of first wire segments is used to couple with the bottom of a heating container disposed on the first side of the body, and is also used to couple with the side surrounding portion of the heating container to heat the side surrounding portion of the heating container.

[0029] In the technical solution of the present invention, the coil structure includes a plurality of coil units, the plurality of coil units include the first coil unit and the second coil unit, the first coil unit has a plurality of turns of the coil, each turn of the coil includes the first wire segment and the second wire segment connected to each other and having opposite currents, wherein each turn of the coil is wound and installed on the first side and the second side of the body, so that the first side and the second side of the body are correspondingly distributed with a plurality of the first wire segments and a plurality of the second wire segments, the plurality of the first wire segments together constitute a working side wire group, the working side wire group is used to correspond to the heating container to perform electromagnetic heating on the heating container, and when working, the working side wire group is set corresponding to the heating container, and each When an alternating current is passed through the first wire segments, according to Ampere's law, the magnetic flux lines generated by each of the first wire segments extend toward the direction of the heating container, and the magnetic flux lines generated by each of the first wire segments extend from one side of the working side wire group toward the direction of the heating container, and then extend to the other side of the working side wire group to form a closed magnetic field located in the first side direction. In this way, the magnetic field formed by the working side wire group extends to both sides thereof on the one hand to have a wider magnetic field area, and extends toward the direction of the heating container to have a higher magnetic field distribution area, so that when the heating container is heated, a wider area of ​​the bottom of the heating container can be heated, and it can extend to the side wall of the heating container to heat the side of the heating container. On this basis, the magnetic flux lines of the first wire segment are mainly distributed to the position corresponding to the side wall of the heating container to improve the heating effect on the side wall of the heating container. Compared with traditional electromagnetic cooking utensils, its magnetic field distribution is reduced for the bottom of the heating container, and there is an obvious cold zone, which leads to uneven heat distribution during heating. Therefore, the present application also provides a second coil unit in the coil structure. The second coil unit is a single-sided winding structure arranged on the first side. It is limited by the working parameters such as the working current and frequency of existing electromagnetic cooking utensils. The heating height of the second coil unit after coupling with the heating container is generally low, and it can only generate eddy currents at the bottom of the heating container to directly heat the bottom of the heating container. It is combined with the first coil unit to heat the above-mentioned obvious cold zone formed by the first coil unit at the bottom of the heating container, so that a wider area of ​​the bottom of the heating container can be heated, and it can extend to the side wall of the pot to heat the side of the pot to meet the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 A three-dimensional schematic diagram of a first embodiment of a coil structure provided by the present invention;

[0032] Figure 2 for Figure 1 Explosion diagram of

[0033] Figure 3 for Figure 1 Schematic diagram of the plane;

[0034] Figure 4 for Figure 1 A cross-sectional schematic diagram of the coil structure in FIG.

[0035] Figure 5 for Figure 1 A three-dimensional schematic diagram of a coil unit in FIG.

[0036] Figure 6 A schematic plan view of a second embodiment of the coil structure provided by the present invention;

[0037] Figure 7 for Figure 6 Explosion diagram of

[0038] Figure 8 for Figure 6 A three-dimensional schematic diagram of a coil unit in FIG.

[0039] Fig. 9 A three-dimensional schematic diagram of a third embodiment of the coil structure provided by the present invention;

[0040] Fig.10 for Fig. 9 Explosion diagram of

[0041] Fig.11 for Fig. 9 A three-dimensional schematic diagram of a coil unit in FIG.

[0042] Fig.12 for Figure 1 A three-dimensional schematic diagram of a connection structure being arranged on the coil unit;

[0043] Fig.13 for Fig.12 A schematic cross-sectional view at the connection structure;

[0044] Fig.14 A schematic diagram of the principle of heating a heating container by the coil structure provided by the present invention;

[0045] Fig.15 for Fig.14 A plan view of .

[0046] Description of Figure Numbers:

[0047]

[0048]

[0049] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] The electromagnetic heating cooking device is used to heat a heating container such as a cooker through an electromagnetic heating coil. Usually, the heating coverage area is the area projected on the bottom of the cooker by the electromagnetic heating coil. The area beyond the electromagnetic heating coil, such as the pot wall, cannot be heated. When the pot wall is adjusted to heat the pot wall, the heating of the bottom projection area of ​​the cooker will be weakened. Therefore, a heating structure is urgently needed to solve the above problem.

[0054] In view of this, the present invention provides a coil structure. Figures 1 to 15 The present invention provides an embodiment of the coil structure, which will be described below in conjunction with specific drawings.

[0055] See also Figures 1 to 15 The coil structure 100 includes a body 1 and a plurality of coil units 2, wherein the body 1 has a first side 11 and a second side 12 opposite to each other; the plurality of coil units 2 include a first coil unit 21 and a second coil unit 22, wherein the first coil unit 21 includes a plurality of turns of coil 211, wherein each turn of the coil 211 includes a first wire segment 211a and a second wire segment 211b that are connected to each other and have opposite current directions, and each turn of the coil 211 is wound around the first side 11 and the second side 12 of the body 1, so that the first side 11 of the body 1 has a plurality of the first wire segments 211a, and the second side 12 of the body 1 has a plurality of the second wire segments 211b, and the second coil 211 is arranged on the first side 11 of the body 1.

[0056] In the technical solution of the present invention, the coil structure 100 includes a plurality of coil units 2, the plurality of coil units 2 include the first coil unit 21 and the second coil unit 22, the first coil unit 21 has a plurality of turns of the coil 211, each turn of the coil 211 includes the first wire segment 211a and the second wire segment 211b connected to each other and having opposite currents, wherein each turn of the coil 211 is wound and installed on the first side 11 and the second side 12 of the body 1, so that the first side 11 and the second side 12 of the body 1 are correspondingly distributed with a plurality of the first wire segments 211a and a plurality of the second wire segments 211b, and the plurality of the first wire segments 211a together constitute a working side wire group, and the working side wire group is used to correspond to the heating container to perform electromagnetic heating on the heating container. When working, The working side wire group is arranged corresponding to the heating container, and when an alternating current is passed through each of the first wire segments 211a, according to Ampere's law, the magnetic flux lines generated by each of the first wire segments 211a extend toward the direction of the heating container, and the magnetic flux lines generated by each of the first wire segments 211a extend from one side of the working side wire group toward the direction of the heating container, and then extend to the other side of the working side wire group to form a closed magnetic field located in the direction of the first side 11. In this way, the magnetic field formed by the working side wire group extends to both sides thereof on the one hand to have a wider magnetic field area, and extends toward the direction of the heating container to have a higher magnetic field distribution area, so that when the heating container is heated, a wider area of ​​the bottom of the heating container can be heated, and it can extend to the side wall of the heating container to heat the side of the heating container. On this basis, the magnetic flux lines of the first wire segment 211a are mainly distributed to the position corresponding to the side wall of the heating container to improve the heating effect on the side wall of the heating container. Compared with traditional electromagnetic cooking utensils, its magnetic field distribution is reduced for the bottom of the heating container, and there is an obvious cold zone, which leads to uneven heat distribution during heating. Therefore, the present application further provides a second coil unit 22 in the coil structure 100. The second coil unit 22 is a single-sided winding structure provided on the first side 11. It is limited by the working parameters such as the working current and frequency of the existing electromagnetic cooking utensils. The heating height of the second coil unit 22 after coupling with the heating container is generally low, and it can only generate eddy currents at the bottom of the heating container to directly heat the bottom of the heating container. It is combined with the first coil unit 21 to heat the obvious cold zone formed by the first coil unit 21 at the bottom of the heating container, so that a wider area of ​​the bottom of the heating container can be heated, and it can extend to the side wall of the pot to heat the side of the pot to meet the use requirements.

[0057] It should be noted that the coil 211 in the present application is not only circular, but can also be square or elliptical. The coil 211 refers to a line segment that is bent to form a line segment that is basically arranged in a full circle. For this reason, in one of the coils 211, the direction of the current is clockwise or counterclockwise, but when the coil 211 is cut from the middle area, the current direction of one of the wire segments is from one end to the other end, while the current direction of the other wire segment is from the other end to one end, that is, the current directions are opposite. Therefore, each turn of the coil 211 includes a first wire segment 211a and a second wire segment 211b that are connected to each other and have opposite currents.

[0058] Specifically, the first coil unit 21 is provided in plurality. It is understandable that the side walls of the daily used heating container are all annular structures, and a single first coil unit 21 can heat the two sides of the side wall in the opposite direction at most, and outside the optimal heating area, the heating performance is sharply reduced until a heating blind area appears, so the first coil unit 21 should be provided in plurality to heat and cover the side wall of the heating container, and it is understandable that the more the number of the first coil units 21 is provided, the better it can be guaranteed that each part of the side wall of the heating container can correspond to the optimal heating area of ​​the first coil unit 21, so as to obtain the best side wall heating performance, but the plurality of the first coil units 21 need to be arranged along the circumference of the body 1, and the more the first coil units 21 are provided, the smaller the angle occupied by each coil unit 2, so that its installation area is reduced, and then the number of the coils 211 wound thereon is reduced, and the heating performance of each first coil unit 21 is reduced by changing direction, and at the same time, when the first coil units 21 are provided in large numbers, the installation is also more complicated, and even the control logic is more complicated, and the practicality is poor. Therefore, the specific number of the first coil units 21 needs to be determined based on actual needs and is not specifically limited here. In this application, four groups of the first coil units 21 are mainly described in detail.

[0059] In addition, similar to the arrangement of the first coil unit 21, the number of the second coil units 22 may not be limited. According to their functions, the second coil units 22 may be arranged at any position on the bottom of the corresponding heating container, and of course, they may also be arranged at the side wall of the corresponding heating container, and may also achieve a certain heating function. The specific number of arrangements and the specific arrangement area of ​​the second coil units 22 are mainly based on the size of the vacant area on the main body 1 after the first coil units 21 are laid, and are not limited here. In this application, the specific description is mainly based on the arrangement of a group of the second coil units 22.

[0060] In summary, the embodiment actually given in the present application is to set a second coil unit 22 in the middle of the main body 1, and set four groups of first coil units 21 on the periphery of the second coil unit 22, and the four groups of first coil units 21 are distributed circumferentially along the first side 11 of the main body 1.

[0061] Specifically, the first side 11 of the body 1 includes an inner ring where the second coil unit 22 is located, and an outer ring where the first coil unit 21 is located: wherein the diameter of the inner ring is R1, then R1≤230mm; and / or, the diameter of the outer ring is R2, then R2≤300mm. In this embodiment, the covering size of the first coil unit 21 and the second coil unit 22 is set, specifically, the inner ring on the body 1 is used to wind the second coil unit 22, and the maximum diameter of the inner ring is not greater than 230mm, and outside the inner ring, the body 1 is also provided with an outer ring, and the maximum diameter of the outer ring is not greater than 300mm, thereby limiting the size of the first coil unit 21 and the second coil unit 22 and the approximate size of the body 1, meeting the structural assembly requirements of the cooking utensil, and ensuring the heating performance of the first coil unit 21 and the second coil unit 22.

[0062] In addition, the multiple coil units 2 provided in the coil structure 100, including the first coil unit 21 and the second coil unit 22, can be directly connected to the power terminals on the cooking appliance at both ends of the windings, or can be connected in series to form a series structure, without affecting the heating performance of each coil unit 2 itself. Specifically, if the number of windings for winding the coil unit 2 is set to be multiple, each winding for winding the coil unit 2 can be independently controlled by the cooking appliance, including but not limited to opening, closing, and adjusting current parameters, etc., to control the heating performance of the coil unit 2 wound by it. Based on the above situation, it can be imagined that different coil units 2 can be wound by the same winding according to needs, and can be controlled at the same time to reduce control costs; and some of the coil units 2 can be set to be wound by different windings according to needs, and can be independently controlled to achieve functions including regional heating and heating power adjustment.

[0063] It is understandable that the multiple coil units 2 can be wound by independent windings, so that the cooking appliance can independently control each coil unit 2, thereby making the control scheme more flexible. However, it is obvious that on the one hand, if the number of windings is too large, the more the number of connection terminals with the mainboard of the cooking appliance is, the higher the structural cost is. At the same time, the more complex the control logic required to be set in the cooking appliance is, the higher the control cost is, and the more likely it is that structural and control abnormalities will occur, affecting the user experience. In essence, the coil unit 2 only includes a plurality of the first coil units 21 for mainly heating the side walls of the heating container and a second coil unit 22 for mainly heating the bottom of the heating container. Considering that there is no need to set up a more complicated control logic, in the present application, all the coil units 2 can be connected in series, that is, they can be wound by the same winding wire to perform synchronous control and simplify the structure and control logic; a plurality of the first coil units 21 can also be connected in series and connected in parallel with the second coil unit 22, that is, the plurality of the first coil units 21 can be synchronously controlled to separately control the function of the first coil unit 21 for mainly heating the side walls of the heating container and the function of the second coil unit 22 for mainly heating the bottom of the heating container; a plurality of the first coil units 21 can also be formed into a plurality of coil groups in parallel to control different coil groups to heat different parts of the side walls of the heating container.

[0064] Specifically, in the first embodiment of the present application, a plurality of the first coil units 21 and the second coil units 22 are connected in series to form a coil group. That is, the plurality of the first coil units 21 and the second coil units 22 are all wound by the same winding wire, and the number of power terminals on the corresponding cooking utensils is the least, which is convenient for connection operation, and the control logic of the cooking utensils is also the simplest, which only needs to control the overall opening, closing or adjusting the input power, the overall assembly is convenient, the control logic is convenient, and the production cost is low.

[0065] In addition, in the second embodiment of the present application, a plurality of the first coil units 21 are connected in series to form the coil group, that is, four of the first coil units 21 are wound in series by a winding wire, and the second coil unit 22 is connected to the cooking utensil by an independent winding wire. In the third embodiment of the present application, the four first coil units 21 are combined in pairs to form two of the coil groups, and the second coil unit 22 is connected to the cooking utensil by an independent winding wire. In addition, there are a variety of connection methods, including setting three of the four first coil units 21 to be wound in series by the same winding wire, and connecting another first coil unit 21 in series with the second coil unit 22, or both of them are set independently; it is also possible to set the four first coil units 21 and the second coil unit 22 independently to be connected to the cooking utensil respectively. Moreover, when the number of the first coil units 21 is set to five, six or even more, the connection method is more complicated, and is not limited one by one here, mainly based on actual functional requirements.

[0066] It is understandable that when multiple coil units 2 are connected in parallel, multiple functions can be realized by controlling the opening and closing and power size of different coil units 2. For example, when a cooking utensil is needed for high-temperature stir-frying, the first coil unit 21 and the second coil unit 22 are opened simultaneously to heat the heating container comprehensively and ensure a high cooking temperature; when a cooking utensil is used to fry food, only the second coil unit 22 needs to be opened to heat the bottom of the heating container at high temperature; and in more other needs, even the multiple first coil units 21 arranged on the periphery of the main body 1 can be controlled to open and close cyclically to realize cyclic heating of the side wall of the heating container. For different usage functions, it is easy to split the heating method of the usage function to set the specific connection method of the multiple coil units 2. Therefore, there is no need to specifically limit the connection method here. It can be realized by specific adjustment based on the actual functional requirements of the cooking utensil.

[0067] In addition, the coil units 2 in the coil group are connected by a connecting structure 3. It can be understood that the same winding is not limited to a complete winding structure, but can also be a whole winding structure formed by connecting multiple winding segments through a connecting structure 3 in series. The setting position of the connecting structure 3 is not limited, but in order to ensure the smooth winding of the coil unit 2, the connecting structure 3 is set at the connection between the two coil units 2 in the present application. On the one hand, as described above, it avoids affecting the winding of the coil unit 2. On the other hand, each of the coil units 2 required to be connected in series can be wound by an independent winding segment, and then connected by the connecting structure 3, so that the coil unit 2 can be synchronously and independently wound, reducing the overall winding time of the coil structure 100. On the other hand, when there are different series connection strategies, it is convenient to switch between the series connection strategies to adapt to different control logics. There is no need to replace the coil unit 2 that has been wound to obtain different control functions. It is suitable for the production and manufacturing of models with the same structure but different functions, which can make the coil unit 2 universal and reduce the production cost of designing and producing different coil structures 100 for different models. Specifically, the connection structure 3 may not be limited, as long as it can achieve stable connection of different winding segments. In the present application, the connection structure 3 may be set as one of a terminal screw locking structure, a riveting structure, and a terminal plug-in structure.

[0068] In addition, the coil structure 100 further includes a magnet 4, and the magnet 4 is at least partially located between the first wire segment 211a and the second wire segment 211b. The magnet 4 is arranged on the coil structure 100, and the magnet 4 is at least partially located between the first wire segment 211a and the second wire segment 211b, which can greatly reduce the interference of the magnetic field generated by the second wire segment 211b on the first wire segment 211a, so that high-power heating can be better coordinated with the electric control; in addition, the magnetic lines of force of the first wire segment 211a gathered by the magnet 4 can also enhance the magnetic field received by the heating container, thereby reducing the energy dissipated by the coil structure 100 and enhancing the heating performance of the coil structure 100. In addition, the magnet 4 can also extend to the position corresponding to the second coil unit 22, or the magnet 4 can be independently set at the position corresponding to the second coil unit 22. Similar to the magnetic lines of force of the magnet 4 acting on the first wire segment 211a, the magnet 4 acts on the second coil unit 22 to gather the magnetic lines of force of the second coil unit 22 to enhance the magnetic field received by the heating container, thereby reducing the energy dissipated by the coil structure 100, so as to also enhance the magnetic field received by the heating container.

[0069] Specifically, the angle between the projection of the magnet 4 on the first side 11 and the first wire segment 211a is α, and 10°≤α≤90°. The magnet 4 can be an integral setting, that is, it is set as a magnetic block, which can also achieve the required function of gathering magnetic lines of force. When the magnet 4 is set as a magnetic strip, and the magnetic strip is set to extend as far as possible along the direction of the magnetic lines of force, it can achieve a sufficient magnetic line of force gathering effect. The required volume is small, so as to reduce the structural cost, reduce the structural mass and facilitate the structural setting. In summary, the magnet 4 can be set as an integral magnetic block structure, or a combination structure of a magnetic block and a magnetic strip, or a combination structure of a plurality of the magnetic strips. It is not limited here, as long as the required magnetic line of force gathering effect can be achieved. In this application, a combination of a plurality of the magnetic strips is adopted, and in order to ensure that the magnetic strip has a sufficient magnetic line of force gathering effect, because the magnetic lines of force of the winding diverge along its vertical direction, it is necessary to set the magnetic strip to have a certain angle with the winding, specifically 10° to 90°, and preferably 90°.

[0070] In addition, the body 1 includes a first split body 13 and a second split body 14 arranged on both sides of the magnet 4. The body 1 may be provided with a receiving groove in the middle thereof so as to arrange the magnet 4 in the receiving groove to achieve the installation of the magnet 4. However, on the one hand, the first side 11 and the second side 12 of the body 1 are wound by the first coil unit 21, so that the wound first coil unit 21 can also fix the body 1 and the magnet 4. On the other hand, the surface of the body 1 needs to be provided with a groove for winding the coil unit 2. If the body 1 is an integral structure, it is difficult to perform the groove of the first side 11 and the groove of the second side 12 simultaneously, so that the groove process takes a long time. On the other hand, the receiving groove is provided on the body 1, and the magnet 4 needs to be embedded in the receiving groove. For the case where the structure of the magnet 4 is relatively simple, it is easy to operate, but for the case where the structure of the magnet 4 is relatively complex, the operation is cumbersome. Therefore, the present application configures the main body 1 as the independent first split body 13 and the second split body 14 located on both sides of the magnet 4. On the one hand, the first split body 13 and the second split body 14 can be processed separately, shortening the time required for grooving the first side 11 and the second side 12 of the main body 1, thereby improving production efficiency; on the other hand, the assembly of the magnet 4 with the first split body 13 and the second split body 14 is relatively simple. The magnet 4 is placed on one of the first split body 13 and the second split body 14, and the other of the first split body 13 and the second split body 14 is covered so that the first split body 13 and the second split body 14 clamp the magnet 4, thereby completing the installation of the magnet 4, which is convenient to operate; on the other hand, when the first coil unit 21 is wound on the first split body 13 and the second split body 14, the first split body 13 and the second split body 14 can be synchronously fastened, so that there is no need to set other fasteners, and the relative fixation of the first split body 13 and the second split body 14 can be guaranteed.

[0071] In addition, the first coil unit 21 is flatly arranged to have a thickness direction; the first wire segment 211a and the second wire segment 211b are located in the thickness direction of the first coil unit 21. Accordingly, the coil structure 100 can also be arranged in a flat manner, so that the coil structure 100 does not occupy too much thickness space, which is conducive to the arrangement of the coil structure 100 in the shell of the cooking utensil, and is conducive to the thin and light setting of the cooking utensil. In particular, for a heating container that requires side wall heating, the coil structure 100 is no longer required to be arranged in a concave or more complex shape or heating method. It should be pointed out that the coil unit 2 is arranged in a flat manner, and the outer contour of the coil unit 2 is not limited. Its outer contour is specifically generated based on the type and quantity of the coil unit 2 and the shape of the body 1, and the required heating performance can be met.

[0072] Specifically, the interval in the thickness direction between the first coil unit 21 and the end of the second coil unit 22 facing away from the second side 12 is h, and h≤20mm. It can be understood that the magnetic flux lines emitted by the first coil unit 21 only toward the heating container will pass through the heating container to heat the heating container, and the magnetic flux lines emitted in the direction away from the heating container cannot heat the heating container. Even if a certain magnetic field is constrained by a certain magnetic field concentration and magnetic conduction method, there will still be energy loss; while the second coil unit 22 emits magnetic flux lines in the direction of the heating container as a whole, and then returns to the side of the second coil unit 22 facing away from the heating container after circumferentially circling the second coil unit 22, forming a magnetic field loop. Obviously, when the first coil unit 21 and the second coil unit 22 heat the heating container under the same conditions, the heating efficiency of the first coil unit 21 is not as good as that of the second coil unit 22, but the heating height of the first coil unit 21 is greater than that of the second coil unit 22. In this application, in order to ensure the uniformity of heating the heating container when the first coil unit 21 and the second coil unit 22 are enabled at the same time, the height of the second coil unit 22 is set to be lower than the first coil unit 21, that is, the first coil unit 21 is closer to the heating container than the second coil unit 22, so as to obtain a higher heating height of the first coil unit 21, and at the same time reduce the magnetic flux emitted by the second coil unit 22 received by the heating container, so as to reduce the heating power of the second coil unit 22, so as to achieve heating uniformity. Specifically, in this application, the height difference between the second coil unit 22 and the first coil unit 21 is given to be no more than 20 mm. If it exceeds 20 mm, on the one hand, the heating power of the second coil unit 22 is greatly reduced, so that the required heating uniformity is destroyed. On the other hand, the greater the height difference between the two, the greater the thickness of the coil structure 100, which affects the thin and light setting of the cooking appliance. Of course, the heating power control of the first coil unit 21 and the second coil unit 22 can also be achieved by electrical control, that is, controlling the input power of the first coil unit 21 and the second coil unit 22, which can also achieve heating uniformity.

[0073] In addition, the distance between two adjacent coil units 2 is L, and 0mm≤L≤50mm. It can be understood that when there is a gap between two adjacent coil units 2, the gap is an empty space, and no magnetic field is generated. At this time, when the gap between two adjacent coil units 2 is set larger, the magnetic field coverage of this empty space is weak, which in turn affects the heating performance of the heating container, that is, affects the overall heating uniformity of the coil structure 100. Therefore, the maximum distance between two adjacent coil units 2 is limited to no more than 50mm in this application. On the contrary, when the spacing between them is set to 0mm, it is contact winding, which can ensure the magnetic field coverage.

[0074] The present invention further provides a cooking utensil, the cooking utensil comprising the coil structure 100, the specific structure of the coil structure 100 is referred to the above embodiment. Since the cooking utensil adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0075] In this embodiment, the heating container is placed on the cooking utensil, and the magnetic field generated by the plurality of first wire segments 211a is used to couple with the bottom of the heating container (cooker, etc.) placed on the first side 11 of the body 1, and is also used to couple with the side surrounding portion of the heating container to heat the side surrounding portion of the heating container. Under the existing packaging shell, under the premise of limited heating surface, because the first coil unit 21 has a larger heating radiation range, the effective coupling area of ​​the magnetic field generated by the first coil unit 21 and the heating container is larger, which can not only heat the bottom of the heating container, but also heat the side surrounding portion of the heating container, realizing three-dimensional heating, making the heating effect of the heating container more uniform, and can improve the heating efficiency, reducing the user's use cost.

[0076] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A coil structure, characterized in that: include: a body having opposing first and second sides; as well as, A plurality of coil units include a first coil unit and a second coil unit, wherein the first coil unit includes a plurality of turns of coils, each turn of the coils includes a first wire segment and a second wire segment that are connected to each other and have opposite current directions, each turn of the coils is wound around a first side and a second side of the body, so that the first side of the body has a plurality of the first wire segments, the second side of the body has a plurality of the second wire segments, and the second coil is arranged on the first side of the body.

2. The coil structure according to claim 1, characterized in that: A plurality of the first coil units are provided.

3. The coil structure according to claim 2, characterized in that: A plurality of the first coil units and the second coil units are connected in series to form a coil group.

4. The coil structure according to claim 2, characterized in that: A plurality of the first coil units are connected in series to form a coil group, and the coil group is connected in parallel with the second coil unit.

5. The coil structure according to claim 2, characterized in that: Some of the first coil units are connected in series to form a coil group, and another part of the first coil units are connected in series to form another coil group. The two coil groups and the second coil unit are connected in parallel.

6. The coil structure according to any one of claims 3 to 5, characterized in that: The coil units in the coil group are connected via a connecting structure.

7. The coil structure according to claim 6, characterized in that: The connection structure includes a terminal screw locking structure, a riveting structure or a terminal plug-in structure.

8. The coil structure according to claim 2, characterized in that: The second coil unit is located in the middle of the first side of the body; The plurality of first coil units are located at the periphery of the second coil unit and distributed along the circumference of the first side of the body.

9. The coil structure according to claim 8, characterized in that: The first side of the body includes an inner ring where the second coil unit is located, and an outer ring where the first coil unit is located: Wherein, the diameter of the inner ring is R1, then R1≤230mm; and / or, The diameter of the outer ring is R2, then R2≤300mm.

10. The coil structure according to claim 1, characterized in that: The coil structure also includes a magnet, and the magnet is at least partially located between the first wire segment and the second wire segment.

11. The coil structure according to claim 10, characterized in that: The angle between the projection of the magnet on the first side and the first wire segment is α, and 10°≤α≤90°.

12. The coil structure according to claim 10, characterized in that: The main body includes a first split body and a second split body which are arranged on both sides of the magnet.

13. The coil structure according to claim 1, characterized in that: The first coil unit is arranged flat to have a thickness direction; The first wire segment and the second wire segment are located in a thickness direction of the first coil unit.

14. The coil structure according to claim 13, characterized in that: The distance between the first coil unit and the second coil unit at one end facing away from the second side in the thickness direction is h, and h≤20 mm.

15. The coil structure according to claim 1, characterized in that: The distance between two adjacent coil units is L, and 0mm≤L≤50mm.

16. A cooking utensil, characterized in that: Comprising the coil structure according to any one of claims 1 to 15.

17. The cooking appliance according to claim 16, characterized in that The magnetic field generated by the plurality of first wire segments is used to couple with the bottom of the heating container disposed on the first side of the body, and is also used to couple with the side surrounding portion of the heating container to heat the side surrounding portion of the heating container.

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