Coil structure and electromagnetic heating cooking device

Abstract

The invention discloses a coil structure and an electromagnetic heating cooking device.The coil structure comprises at least one coil unit, the coil unit is provided with multiple 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, the multiple first wire sections are arranged to be working side wire sections respectively, and the multiple second wire sections are arranged to be working side wire sections respectively. The multiple working side wire sections are distributed along the first face area to jointly form a working side wire set, one side of the working side wire set is used for corresponding to a heating container so as to conduct electromagnetic heating on the heating container, at least part of the second wire sections are arranged to be deviation side wire sections, and the deviation side wire sections are arranged to deviate from the first face area. 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 extend towards the side wall part of the cookware, so that the side part of the cookware can be heated.

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 devices, and in particular to a coil structure and an electromagnetic heating cooking device. Background Art

[0004] Induction heating cooking devices are used to heat heating containers such as pots through electromagnetic heating coils. Figure 1a to Figure 1c , Figure 1a and Figure 1b The arrows are the directions of magnetic flux lines. Figure 1c The arrows in the figure are eddy currents. When the conventional electromagnetic heating coil 100' is working, the heating coverage area is usually the area projected by the electromagnetic heating coil on the bottom of the pot 200'. The area beyond the electromagnetic heating coil, such as the pot wall, cannot be heated, which will cause the pot bottom to be hot and the pot wall to be cold. Summary of the invention

[0005] The main purpose of the present invention is to provide a coil structure and an electromagnetic heating cooking device, aiming to improve the problem of limited working area of ​​the electromagnetic heating coil in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention proposes a coil structure, including at least one coil unit, the coil unit having multiple turns of coil, each turn of the coil including a first wire segment and a second wire segment that are connected to each other and have opposite currents, wherein multiple first wire segments are respectively set as working side wire segments, and multiple working side wire segments are distributed along a first surface area to jointly constitute a working side wire group, one side of the working side wire group is used to correspond to a heating container to perform electromagnetic heating on the heating container, and at least part of the second wire segments are set as deviating side wire segments, and the deviating side wire segments are set deviating from the first surface area.

[0007] In one embodiment, the deviating side wire segment is arranged to deviate from the first surface area toward the other side of the working side wire group; and / or,

[0008] All of the first wire segments are set as the working side wire segments; and / or,

[0009] All of the second conductor segments are configured as the deviating side conductor segments.

[0010] In one embodiment, at least a portion of the second wire segments of the coils are bent relative to the first wire segments, so that the deviating-side wire segments are disposed away from the first surface area.

[0011] In one embodiment, at least a portion of the second wire segments of the coils are bent toward the other side of the working-side wire group relative to the first wire segments, so that the deviating-side wire segments are disposed away from the first surface area.

[0012] In one embodiment, the deviating-side wire segment is located on the other side of the working-side wire group and is arranged opposite to the working-side wire group.

[0013] In one embodiment, the coil unit is arranged flat to have a thickness direction;

[0014] The working-side wire segment and the deviation-side wire segment are located in a thickness direction of the coil unit.

[0015] In one embodiment, the coil structure further comprises a support;

[0016] The coil winding is mounted on the support, and the working side wire segment and the deviating side wire segment are located on opposite sides of the support.

[0017] In one embodiment, at least a portion of the structure of the bracket is made of soft magnetic material.

[0018] In one embodiment, the soft magnetic material includes one of ferrite, nanocrystal and silicon steel sheet.

[0019] In one embodiment, the coil structure further includes a shielding structure disposed on a side where the deviating-side wire segment is located.

[0020] In one embodiment, the distance between the shielding structure and the deviated side conductor segment is less than 50 mm.

[0021] In one embodiment, the material of the shielding structure includes metal material.

[0022] In one embodiment, the number of the working-side wire segments is greater than three.

[0023] In one embodiment, there is a winding gap between at least one pair of adjacent working-side wire segments.

[0024] In one embodiment, at least one of the winding gaps is greater than or equal to 2 mm.

[0025] In one embodiment, the ratio of the number of the working-side wire segments to the number of the deviation-side wire segments is B, and 0.8≤B≤1.2.

[0026] In one embodiment, 1<B≤1.2.

[0027] In one embodiment, the ratio of the length of the working-side wire segment to the length of the deviation-side wire segment is L, and L>1.

[0028] In one embodiment, 1<L≤5.

[0029] In one embodiment, in at least one pair of the deviated-side wire segment and the working-side wire segment connected to each other, the length of the working-side wire segment is greater than the length of the deviated-side wire segment.

[0030] In one embodiment, the deviating side wire segment is arranged in a straight line;

[0031] The working side wire segment is arranged in a curve.

[0032] In one embodiment, the distance between the working-side wire segment and the deviation-side wire segment is D, and 1 mm<D<50 mm.

[0033] In one embodiment, the working side wire segments of the coil unit are distributed in a working area.

[0034] In one embodiment, the working area is arranged in a square, circular, triangular, elliptical or racetrack shape.

[0035] In one embodiment, the coil unit is provided with one;

[0036] The working side wire segment of the coil unit extends from one end of the working area to the other end of the working area.

[0037] In one embodiment, the working side wire segment is arranged in a straight line; or,

[0038] The working area has a middle portion, and the working side wire segments located on both sides of the working area are bent from both ends to the middle segment away from or close to the middle portion of the working area.

[0039] In one embodiment, the coil unit is provided in plurality.

[0040] In one embodiment, center lines of the working side wire groups of at least two of the coil units are arranged at an inclined angle.

[0041] In one embodiment, at least two of the plurality of coil units are distributed along the circumference of the working area.

[0042] In one embodiment, in at least two of the plurality of coil units, at least one of the working-side wire segments is bent toward the center of the working area.

[0043] In one embodiment, among the plurality of coil units, current directions of working-side wire segments of at least one pair of adjacent coil units are opposite.

[0044] In one embodiment, among the plurality of coil units, current directions of working-side wire segments of at least one pair of adjacent coil units are the same.

[0045] The present invention also provides an electromagnetic heating cooking device, including a coil structure, wherein the coil structure includes at least one coil unit, wherein the coil unit has multiple turns of coils arranged sequentially along the length direction of its winding center, and the multiple turns of coils include a working side wire segment and a deviation side wire segment corresponding to the opposite sides of the winding center.

[0046] In the technical solution provided by the present invention, the coil structure includes at least one coil unit, the coil unit has multiple turns of coils, each turn of the coil includes a first wire segment and a second wire segment that are connected to each other and have opposite currents, wherein multiple first wire segments are respectively set as working side wire segments, multiple working side wire segments are distributed along the first surface area to jointly constitute a working side wire group, one side of the working side wire group is used to correspond to the heating container, and this side is called the working side, so as to perform electromagnetic heating on the heating container, at least part of the second wire segment is set as a deviating side wire segment, the deviating side wire segment is set away from the first surface area, the multiple working side wire segments define a working area, when working, the working side of the working side wire group corresponds to the heating container, each of the working side wire segments is passed through an alternating current in amperes. According to the rule, in the middle area of ​​the working area, the magnetic flux lines generated by each working side wire segment extend toward the working side of the working side wire group, and in the two side end areas of the working side, the magnetic flux lines generated by each working side wire segment extend from one side end of the working area along the working side toward the direction away from the working side wire group, and then extend to the other side end of the working area to form a closed magnetic field. In this way, the magnetic field formed by the working side wire group extends toward the periphery of the outer end area of ​​the working side wire group on the one hand to have a wider magnetic field area, and extends to the outside of the working side of the working side wire group 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 pot to heat the side of the pot. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] 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.

[0048] Figure 1a-Figure 1c A schematic diagram of an electromagnetic heating cooking device in the prior art;

[0049] Figure 2 A three-dimensional schematic diagram of an embodiment of an electromagnetic heating cooking device provided by the present invention;

[0050] Figure 2a-2c for Figure 2 Schematic diagram of magnetic flux lines and eddy currents when the electromagnetic heating cooking device is working;

[0051] Figure 3 for Figure 2 A three-dimensional schematic diagram of a coil structure of an electromagnetic heating cooking device;

[0052] Figure 4 for Figure 3 A three-dimensional schematic diagram of a coil unit of a mid-coil structure;

[0053] Figure 5 for Figure 2 Another is a perspective schematic diagram of an embodiment of the coil structure of the electromagnetic heating cooking device;

[0054] Figure 6 A three-dimensional exploded schematic diagram of an embodiment of a coil structure provided by the present invention;

[0055] Figure 7 for Figure 6 A cross-sectional perspective schematic diagram of a coil structure;

[0056] Figure 8 for Figure 6 A schematic diagram of another embodiment of a coil structure;

[0057] Fig. 9 A three-dimensional exploded schematic diagram of another embodiment of the coil structure provided by the present invention;

[0058] Fig.10 for Fig. 9 A cross-sectional perspective schematic diagram of a coil structure;

[0059] Figure 11-Figure 15 A schematic diagram of a group of embodiments of the coil structure provided by the present invention;

[0060] Figure 16-Figure 22 A schematic diagram of another set of embodiments of the coil structure provided by the present invention;

[0061] Fig.23 A three-dimensional schematic diagram of another embodiment of the electromagnetic heating cooking device provided by the present invention.

[0062] Description of Figure Numbers:

[0063] Label name Label name 100 Coil structure 20 Grooves 1 Coil unit 21 First bracket 11 Working side conductor segment 22 Second bracket 12 Deviation side conductor segment 23 Partition 1a Work Area 101 Shielding structure 2 Bracket 200 Heating container

[0064] 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

[0065] 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.

[0066] 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.

[0067] 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.

[0068] The present invention provides an electromagnetic heating cooking device, such as Figure 2 This is an embodiment of the electromagnetic heating cooking device provided by the present invention. The arrows in the figure are magnetic flux lines. The electromagnetic heating cooking device can be an electromagnetic cooker, a pressure cooker, a cooking machine, etc. The electromagnetic heating cooking device includes a coil structure 100 and a heating container 200. The heating container 200 can be a pot. The pot can be a flat pan or an arc bottom pot. Specifically, Figure 2 In the example, the pot is a curved bottom pot. Obviously, Figure 2 Only a part of the structure of the electromagnetic heating cooking device is shown. Usually, the electromagnetic heating cooking device also includes a shell, and the coil structure 100 is accommodated in the shell. Of course, the shell is also provided with an electric control component and the like.

[0069] It should be noted that the coil structure 100 can be sold as an independent intermediate product or component. For this purpose, the present invention also provides a coil structure 100.

[0070] That is, the present invention provides a coil structure 100 and an electromagnetic heating cooking device having the coil structure 100 .

[0071] When the traditional electromagnetic heating coil disk (i.e. coil structure) works, there are the following problems:

[0072] 1. The heating coil can only be projected to the position covered by the bottom of the pot. The pot wall position beyond the coil disk (the coil winding area) cannot be heated (due to the increase in the distance between the disks, the heating effect is poor or even cannot be heated);

[0073] 2. If the heat is concentrated too much in the center, the bottom of the dish will be easily burnt;

[0074] 3. During the heating process, the pot wall cannot be heated directly, but only relies on the heat conduction from the bottom of the pot, which results in a lower temperature of the pot wall. The residual water on the pot wall is difficult to evaporate, and it is easy to cause oil splashing when it falls into the hot oil during cooking;

[0075] 4. The pot wall is not heated directly, and the temperature in this area is relatively low, resulting in a lack of pot gas during cooking, and the fried dishes are not tasty.

[0076] Existing electromagnetic heating cooking devices solve the problem of pot wall heating:

[0077] One is to use a double-stage large coil and adjust the distance between the coil winding surface and the pot side wall, that is, the coil spacing, to achieve pot wall heating. The disadvantage is that the adjustable range of the coil spacing is limited, and the actual heating effect has no obvious improvement;

[0078] Second, a dish-shaped or concave wire coil is used for heating, and the stove panel is also made into a shape that matches the curvature (dish-shaped or concave). This kind of product can only be adapted to pots with a specific curvature, and is difficult to be compatible with other curvatures or flat-bottomed pots, resulting in low market acceptance;

[0079] The third is to use an intermediate heating body, such as a magnetic sandbag. The shape of the sandbag can change with the pot. After the sandbag is heated, the heat is transferred to the pot through the sandbag. The disadvantage is that the thermal efficiency is low, and the sandbag is a high-temperature object that can easily cause burns and other safety issues.

[0080] The fourth is to use infrared radiation heating, such as infrared resistance furnace, halogen tube light wave furnace to radiate heat to the pot wall. The disadvantages are low heating efficiency, high cost of thermal radiation insulation, and also the safety problem of high temperature burns.

[0081] Different from the above-mentioned heating method, the present invention provides a new coil structure and an electromagnetic heating cooking device having the coil structure, please refer to Figure 2 , Figure 2 A three-dimensional schematic diagram of an embodiment of an electromagnetic heating cooking device provided by the present invention; Figure 2a-2b The arrows in the figure are schematic diagrams of the magnetic flux lines when the electromagnetic heating cooking device is working. Figure 2c The arrows in FIG. 1 are schematic diagrams of eddy currents when the electromagnetic heating cooking device is working. The electromagnetic heating cooking device includes a coil structure 100 and a heating container 200 .

[0082] Please read further Figure 3 to Figure 4 , the coil structure 100 includes at least one coil unit 1, that is, the coil unit 1 can be one or more. The coil unit 1 has multiple turns of coils (not labeled), each turn of the coil includes a first wire segment (mainly corresponding to the working side wire segment 11) and a second wire segment (mainly corresponding to the deviation side wire segment) that are connected to each other and have opposite currents. Obviously, the current flow direction of the multiple first wire segments is set from one end corresponding to each other toward the other end corresponding to each other, that is, the flow direction is basically the same from both ends. Among them, multiple first wire segments are respectively set as working side wire segments 11, and multiple working side wire segments 11 are distributed along the first surface area to jointly form a working side wire group (not labeled), one side of the working side wire group (that is, the upper side shown in the figure, which can also be presented as the working side later) is used to correspond to the heating container to perform electromagnetic heating on the heating container, and at least part of the second wire segment is set as the deviation side wire segment 12, and the deviation side wire segment 12 is set away from the first surface area.

[0083] It should be pointed out that the "coil" in the "one-turn coil" mentioned in the present application is not just circular, it can be square or elliptical, and the "coil" refers to a wire segment that is bent to form a basically complete circle. For this reason, in a coil, the direction of the current is clockwise or counterclockwise, but when the "coil" 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 includes a first wire segment and a second wire segment that are connected to each other and have opposite currents.

[0084] “A plurality of the first conductor segments are respectively set as the working side conductor segments 11 ” can mean that all of the first conductor segments are set as the working side conductor segments 11 , or can also be part of them. Here, it is just to illustrate that there are a plurality of working side conductor segments 11 .

[0085] "The multiple working side wire segments 11 are distributed along the first surface area to jointly constitute a working side wire group." The multiple working side wire segments 11 can be distributed along a plane, that is, the first surface area is a plane. Alternatively, the multiple working side wire segments 11 can be distributed along a curved surface, that is, the first surface area is a curved surface. In an embodiment of the present invention, the first surface area is taken as an example as a plane or a roughly plane.

[0086] “At least part of the second wire segments are set as the deviating side wire segments 12” can mean that all of the second wire segments are set as the deviating side wire segments 12, or part of the second wire segments are set as the deviating side wire segments 12. In the main embodiments of the present invention, it is taken as an example that all of the second wire segments are set as the deviating side wire segments 12.

[0087] “The deviating side wire segment 12 is arranged to deviate from the first surface area” can mean that the deviating side wire segment 12 deviates from the first surface area toward the periphery of the first surface area, or can mean that the deviating side wire segment 12 deviates from the first surface area toward one side (any side, such as the upper side or the lower side, the lower side in the subsequent embodiment) of the first surface area. In the embodiment of the present invention, the deviating side wire segment 12 deviates from the first surface area toward one side of the first surface area as an example.

[0088] And more specifically, in this embodiment, the deviating-side wire segment 12 is arranged to deviate from the first surface area toward the other side of the working-side wire group, that is, the lower side as shown in the figure.

[0089] In the technical solution provided by the present invention, the coil structure 100 includes at least one coil unit 1, the coil unit 1 has multiple turns of coils, each turn of the coil includes a first wire segment and a second wire segment that are connected to each other and have opposite currents, wherein multiple first wire segments are respectively set as working side wire segments 11, and multiple working side wire segments 11 are distributed along the first surface area to jointly constitute a working side wire group, one side of the working side wire group is used to correspond to the heating container, and this side is called the working side, so as to perform electromagnetic heating on the heating container, at least part of the second wire segment is set as a deviating side wire segment 12, and the deviating side wire segment 12 is set away from the first surface area, and the multiple working side wire segments 11 define a working area 1a. When working, the working side of the working side wire group corresponds to the heating container, and each of the working side wire segments 11 is connected to the heating container by an alternating current. According to Abe's law, in the middle area of ​​the working area 1a, the magnetic flux lines generated by each of the working side wire segments 11 extend toward the working side of the working side wire group, and in the two side end areas of the working side, the magnetic flux lines generated by each of the working side wire segments 11 extend from one side end of the working area 1a along the working side in the direction away from the working side wire group, and then extend to the other side end of the working area 1a to form a closed magnetic field. In this way, the magnetic field formed by the working side wire group extends toward the periphery of the outer end area of ​​the working side wire group on the one hand to have a wider magnetic field area, and extends to the outside of the working side of the working side wire group 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 pot to heat the side of the pot.

[0090] In a specific application embodiment of the above-mentioned technical scheme of the present application, the technical scheme provided by the present invention can make the maximum temperature at the height of 40mm of the pot wall of the cookware reach above 110°C, and the heating rate at the height of 40mm of the pot wall of the cookware under 2000W dry-burning conditions can reach above 60°C / min.

[0091] In an embodiment of the present invention, the deviating side wire segment 12 is located on the other side of the working side wire group and is arranged opposite to the working side wire group to better avoid the adverse effect of the magnetic field generated by the second wire segment on the magnetic field generated by the working side wire group. There are many ways to achieve that the deviating side wire segment 12 is located on the other side of the working side wire group, such as the "folding" described later, or: the corresponding partial coils are wound along the direction of the two sides of the working side wire group, and for example, for the presence of the bracket 2 (see Figure 3 ), at least part of the coil is wound around both sides of the bracket 2.

[0092] In other embodiments of the present invention, at least part of the second wire segments of the coils are bent relative to the first wire segments, so that the deviated side wire segment 12 is set away from the first surface area. The second wire segments of part of the coils can be bent relative to the first wire segment, or the second wire segments of all the coils can be bent relative to the first wire segment. Compared with partial bending, all the coils are bent, which correspondingly makes all the second wire segments be set as the deviated side wire segment 12, thereby better avoiding the adverse influence of the magnetic field generated by the second wire segment on the magnetic field generated by the working side wire group.

[0093] It should be pointed out in particular that the "bending setting" is only a phenomenon presented in the final structure and is not limited to a bending process, that is, in the present application, "at least part of the second wire segment of the coil is bent relative to the first wire segment", which can be a "bending setting" in which the coil is first set to a flat setting and then bent, or it can be a bending setting formed by directly winding the wire.

[0094] Furthermore, as in some embodiments of the present invention, the second wire segments of at least some of the coils are folded toward the other side of the working side wire group relative to the first wire segments, so that the deviated side wire segment 12 is located on the other side of the working side wire group and is arranged opposite to the working side wire group. Similarly, the second wire segments of some of the coils may be folded toward the other side of the working side wire group relative to the first wire segments, or the second wire segments of all the coils may be folded toward the other side of the working side wire group relative to the first wire segments. Compared with partial folding, all the coils are bent, which correspondingly enables all the second wire segments to be set as the deviated side wire segment 12, thereby better avoiding the adverse influence of the magnetic field generated by the second wire segments on the magnetic field generated by the working side wire group.

[0095] Specifically, in another embodiment of the present invention, Fig.23As shown, at least part of the second wire segments of the coils are bent relative to the first wire segments toward the other side of the working side wire group, so that the deviating side wire segment 12 is set away from the first surface area. The second wire segments of part of the coils can be bent relative to the first wire segments toward the other side of the working side wire group, or the second wire segments of all the coils can be bent relative to the first wire segments toward the other side of the working side wire group. Compared with partial bending, all the coils are bent, which correspondingly makes all the second wire segments be set as the deviating side wire segment 12, thereby better avoiding the adverse effect of the magnetic field generated by the second wire segment on the magnetic field generated by the working side wire group. Specifically, in this embodiment, the bending angle of the coil is approximately 90°, but of course it is not limited to 90°, as long as the second wire segments of at least part of the coils are set at an inclined angle relative to the first wire segment.

[0096] In an embodiment of the present invention, the coil unit 1 is flatly arranged to have a thickness direction, and the working side wire segment 11 and the deviating side wire segment 12 are located in the thickness direction of the coil unit 1. Accordingly, the coil structure 100 can also be arranged in a flat manner, so that the coil structure 100 does not need to occupy too much thickness space, which is beneficial for the arrangement of the coil structure 100 in the shell of the electromagnetic heating cooking device, and is beneficial for the lightweight setting of the electromagnetic heating cooking device. In particular, for the heating container 200 that requires side wall heating, it is no longer necessary for the coil structure 100 to be arranged in a concave or more complex shape or heating method. It should be pointed out that the coil unit 1 is arranged in a flat manner, and the outer contour of the coil unit 1 is not limited. That is, in an embodiment of the present invention, the coil unit 1 can be square, such as Figure 4 As shown, it can also be circular, such as Fig.13 As shown, the runway can also be Fig.12 As shown, etc.

[0097] Generally speaking, the coil unit 1 does not exist alone, and the coil structure 100 also needs to provide a structure for fixing and supporting the coil unit 1. Of course, in some embodiments, such as Figure 4, the coil unit 1 can exist independently, and the coil unit 1 is shaped by colloid after being separated from the winding device after winding is completed. In the embodiment of the present invention, the coil structure 100 also includes a bracket 2, and the coil unit 1 is installed on the bracket 2. The working side wire segment 11 and the deviating side wire segment 12 are located on the opposite sides of the bracket 2. The shape of the bracket 2 is not limited, as long as it can provide support and shaping for the coil unit 1. In the embodiment of the present invention, the bracket 2 is flat, and correspondingly, the coil unit 1 is also flat, which facilitates the arrangement of the coil structure 100 in the housing of the electromagnetic heating cooking device to reduce space. The bracket 2 can be provided with one coil unit 1 or multiple coil units 1, depending on the design requirements. The shape and structure of the bracket 2 will be further described in the subsequent embodiments.

[0098] The material of the bracket 2 is not limited. For example, the material of the bracket 2 can be plastic, ceramic, or a non-fixed and deformable material such as glue. Specifically, in an embodiment of the present invention, the material of at least part of the structure of the bracket 2 is set to a soft magnetic material, that is, Figure 5 As shown, the bracket 2 may be partially made of soft magnetic material. Specifically, a groove 20 is provided in the middle of the bracket 2, and a soft magnetic material is provided in the groove 20. Alternatively, the entire bracket 2 may be made of soft magnetic material. The provision of the soft magnetic material enables the bracket 2 to gather magnetic lines of force to prevent the magnetic lines of force of the coil unit 1 from diffusing outward. At the same time, it can also isolate the working side wire segment 11 from the non-working side wire segment 11, so as to reduce the effect of the magnetic field generated by the deviating side wire segment 12 on the working side wire segment 11 being offset by each other, thereby improving the heating performance of the coil structure 100. Of course, it is also possible that the bracket 2 is made of soft magnetic material as a whole.

[0099] More specifically, see Figure 6 to Figure 7 In an embodiment of the present invention, the bracket 2 includes a first bracket 21, a second bracket 22, and a partition 23 located between the first bracket 21 and the second bracket 22, and the material of the partition 23 includes a soft magnetic material.

[0100] also, Figure 8 Another embodiment provided by the present invention is Figure 6 to Figure 7 The difference lies in the shape of the coil structure 100 and the number of the coil units 1 .

[0101] The soft magnetic material is not specifically limited. In an embodiment of the present invention, the soft magnetic material includes one of ferrite, nanocrystal and silicon steel sheet.

[0102] In the embodiments of the present invention, please refer to Figures 9 and 10, a shielding structure 101 is arranged on the side where the deviated side wire segment 12 is located, that is, the electromagnetic heating cooking device also includes a shielding structure 101. Through the shielding structure 101 on the side where the deviated side wire segment 12 is located, it is possible to prevent the back-to-back winding from generating a magnetic field influence on the back-to-back side of the coil structure 100, and prevent the magnetic field from leaking out of the outside, so as to avoid affecting the electrical components on the back-to-back side of the coil structure 100. When the electromagnetic heating cooking device is an electromagnetic cooker and the supporting table is a metal table, it is possible to avoid the electromagnetic field from diffusing to the metal table and heating the metal table. For example, a circuit board is arranged on the back-to-back side of the coil structure 100 in the shell of the electromagnetic heating cooking device, so as to avoid affecting the circuit board. In short, the shielding structure 101 can play a role in the bad influence caused by the diffusion of the electromagnetic field. Further, in an embodiment of the present invention, the distance between the shielding structure 101 and the deviated side wire segment 12 is less than 50 mm. If the distance is too large, the shielding effect is not good, so in this embodiment, it is less than 50 mm. In one embodiment, the material of the shielding structure 101 includes metal material. When the material of the shielding structure 101 includes metal material, and the distance between the shielding structure 101 and the deviated side wire segment 12 is less than 50 mm, the coupling performance between the coil structure 100 and the heating container 200 such as a cooker can be further improved, thereby further improving the heating efficiency.

[0103] In an embodiment of the present invention, there are multiple working side wire segments 11, and the specific number is not limited and depends on the actual heating needs. Generally speaking, the number of the working side wire segments 11 is greater than 3, otherwise the working side wire segments 11 need to have a sufficiently large current to achieve the heating effect, and excessive current may cause safety hazards.

[0104] There may or may not be gaps between the working side wire segments 11. The gaps are usually referred to as "dense winding" and the gaps are usually referred to as "sparse winding". In an embodiment of the present invention, there is a winding gap between at least one pair of adjacent working side wire segments 11. Compared with the "dense winding" without gaps, the "sparse winding" with winding gaps heats more evenly, especially when the working side wire segment 11 with the winding gap is set in the middle position of the working area 1a, because the middle position of the working area 1a usually corresponds to the middle position of the bottom of the heating container 200, and the middle position is prone to heating concentration, which is not conducive to uniform heating.

[0105] There is no restriction on the size of the winding gap. In an embodiment of the present invention, at least one of the winding gaps is greater than or equal to 2 mm. Therefore, the magnetic field generated between the two adjacent working side wire segments 11 is less likely to overlap, thereby better improving the problem of heating concentration.

[0106] The working side wire segment 11 and the deviating side wire segment 12 are connected to each other to form a coil. Usually, the number of the working side wire segment 11 and the number of the deviating side wire segment 12 are equal. Of course, there are also cases where there are only working side wire segments 11 or only deviating side wire segments 12 in the coils located at both ends of the entire coil unit 1. Therefore, there may be a small difference in the number of the working side wire segments 11 and the deviating side wire segments 12. Therefore, in an embodiment of the present invention, the ratio of the number of the working side wire segments 11 to the number of the deviating side wire segments 12 is B, 0.8≤B≤1.2. Furthermore, in an embodiment of the present invention, 1<B≤1.2, that is, the number of the working side wire segments 11 is greater than the number of the deviating side wire segments 12. Because the working side wire segments 11 are needed during heating, it is more desirable to have a greater number of working side wire segments 11.

[0107] As mentioned above, the working side wire segment 11 is needed during heating, so it is more desirable that the length of the working side wire segment 11 is longer. Therefore, in an embodiment of the present invention, the ratio of the length of the working side wire segment 11 to the length of the deviating side wire segment 12 is L, L>1, that is, the total length of the working side wire segment 11 is longer than the length of the deviating side wire segment 12.

[0108] If L is greater than 1, the working side wire segment 11 needs to be set to a curved or bent setting. The larger L is, the longer the curved or bent path is, but it cannot be infinitely long because the difficulty of winding must be considered. Therefore, in an embodiment of the present invention, 1<L≤5, so that the winding process and the length of the working side wire segment 11 are taken into account and are long enough.

[0109] As mentioned above, the ratio of the length of the working side wire segment 11 to the length of the deviated side wire segment 12 is L, L>1. To achieve this purpose, in an embodiment of the present invention, in at least one pair of the deviated side wire segment 12 and the working side wire segment 11 connected to each other, the length of the working side wire segment 11 is greater than the length of the deviated side wire segment 12, that is, in a pair of the deviated side wire segment 12 and the working side wire segment 11 connected to each other, the length of the working side wire segment 11 is greater than the length of the deviated side wire segment 12, or it can be that in all the deviated side wire segments 12 and the working side wire segments 11 connected to each other, the length of the working side wire segment 11 is greater than the length of the deviated side wire segment 12.

[0110] A method to achieve "in the mutually connected deviated side wire segment 12 and working side wire segment 11, the length of the working side wire segment 11 is greater than the length of the deviated side wire segment 12" can be that the deviated side wire segment 12 is arranged in a straight line, and the working side wire segment 11 is arranged in a curve. Obviously, the curve distance between the two points is significantly greater than the straight line distance between the two points.

[0111] The distance between the working side wire segment 11 and the deviated side wire segment 12 is D, and D should not be too small, otherwise it will be difficult to wind. Especially for the embodiment with the bracket 2, it is necessary to ensure that the bracket 2 has sufficient thickness and thus sufficient strength. Of course, D should not be too large. If it is too large, the wire segment connecting the working side wire segment 11 and the deviated side wire segment 12 will be too long, and such wire segment will be ineffective, that is, the effective wire segment length of the coil structure 100 will be too small and the efficiency will be low. Therefore, in the embodiment of the present invention, 1mm<D<50mm.

[0112] The working side wire segments 11 of the coil units 1 are distributed in a working area 1a. As can be seen from the above, the number of the coil units 1 can be one or more. Of course, when the number is one, the working area 1a is the area where the coil units 1 are distributed. If the number of the coil units 1 is more than one, the working area 1a is the area where more than one coil units 1 are distributed.

[0113] The shape of the working area 1a is not limited. Specifically, according to the needs of the heating container 200, if the bottom of the heating container 200 is circular, the shape of the working area 1a is circular; if the bottom of the heating container 200 is elliptical, the shape of the working area 1a is elliptical; if the bottom of the heating container 200 is square, the shape of the working area 1a is square. Therefore, in the embodiment of the present invention, the working area 1a is square, circular, triangular, elliptical or runway-shaped. For the embodiment in which the bracket 2 is present, the shape of the bracket 2 is substantially consistent with the shape of the working area 1a. Therefore, in the embodiment of the present invention, the bracket 2 is square, circular, triangular, elliptical or runway-shaped.

[0114] In an embodiment of the present invention, Figures 11 to 15 As shown, one coil unit 1 is provided, and a working side wire segment 11 of the coil unit 1 extends from one end of the working area 1 a to the other end of the working area 1 a , that is, the multiple working side wire segments 11 are provided in parallel. Fig.11a The outer dotted line in Fig.11 The edge of the thermal field area of ​​the coil structure 100.

[0115] The working side wire segment 11 extends from one end of the working area 1a to the other end of the working area 1a. The working side wire segment 11 can be a straight line or a non-straight line. The non-straight line includes a curve or a broken line segment, so that the length of the working side wire segment 11 can be long enough.

[0116] See also Fig.12 In an embodiment of the present invention, the working area 1a is arranged in a runway shape, that is, the two ends are arc-shaped and the middle is square, and the working side wire segment 11 extends from one end of the working area to the other end of the working area 1a. The working side wire segment 11 can be arranged in a straight line to facilitate the winding of the coil unit 1.

[0117] In another embodiment of the present invention, Fig.13 and Fig.15 The working area 1a has a middle part, and the working side wire segments 11 located on both sides of the working area 1a are bent away from the middle part of the working area 1a from both ends to the middle section, so as to reduce the number of magnetic flux lines in the middle part of the working area 1a, thereby improving the problem of uneven heating caused by excessively concentrated heating of the working area 1a. In addition, in an embodiment of the present invention, Fig.14 The working area 1a has a middle part, and the working side wire segments 11 located on both sides of the working area 1a are bent from both ends to the middle section close to the middle part of the working area 1a, so that the heating effect of the middle part of the working area 1a is better.

[0118] Specifically, see Fig.13 In an embodiment of the present invention, the working area 1a is arranged in a circular shape, and the working side wire segments 11 located on both sides of the working area 1a are bent from both ends to the middle segment away from the middle of the working area 1a, and a working side wire segment 11 is also arranged in the middle position of the working area 1a to avoid excessive magnetic flux lines in the middle of the working area 1a. By arranging the working side wire segment 11 in the middle, a weak heating zone is avoided in the middle of the working area 1a.

[0119] In addition, see in particular Fig.14 The working area 1a is arranged in a circular shape, and the working side wire segments 11 located on both sides of the working area 1a are bent from both ends to the middle section close to the middle of the working area 1a, and a working side wire segment 11 is also arranged in the middle position of the working area 1a to further enhance the heating effect in the middle.

[0120] Fig.15 and Fig.13 The difference is that Fig.15The working side wire segments 11 located on both sides of the working area 1a are arranged in an arc shape, and no working side wire segment 11 is arranged in the middle position of the working area 1a.

[0121] In another embodiment of the present invention, see Figures 16 to 21 The coil unit 1 is provided in a plurality, and the coil unit 1 is provided to facilitate working areas 1a of different shapes, and the magnetic flux lines of the working area 1a are distributed more uniformly.

[0122] In an embodiment of the present invention, Fig.16 , Fig.17 as well as Fig.18 The center lines of the working side wire groups of at least two of the coil units 1 are set at an inclined angle (as shown in the direction of the dotted line in the figure), and the magnetic flux lines of each of the working side wire groups are from one side of the working side wire group and away from the working side wire group along the working side direction, and then to the other side of the working side wire group to form a closed magnetic field, that is, the magnetic flux lines of the working side wire group are directional, so that the working side wire group has more magnetic flux lines distributed in the directions of its two side parts, and fewer in other directions. Therefore, by setting the center lines of the working side wire groups of at least two coil units 1 to be set at an inclined angle, the distribution directions of the magnetic flux lines generated by them are inconsistent, which can improve the problem of concentrated heating and uneven heating due to the consistent directions of the magnetic flux lines of each coil unit 1.

[0123] Further, in an embodiment of the present invention, if Fig.16 , Fig.17 as well as Fig.18 At least two of the plurality of coil units 1 are distributed along the circumference of the working area 1a, so as to better facilitate the distribution of the magnetic flux lines in each coil unit 1 from various directions of the circumference of the working area 1a, so that multiple areas of the side wall of the heating container 200 can be distributed with magnetic flux lines. Preferably, the coil units 1 are distributed on each side of the working area 1a, so that sufficient magnetic flux lines are distributed on each side of the working area 1a. In addition, in an embodiment of the present invention, in at least two of the coil units 1, at least one of the working side wire segments 11 is bent toward the center of the working area 1a, so as to improve the problem of poor heating effect due to the relatively few magnetic flux lines in the middle of the working area 1a.

[0124] See also Fig.16In an embodiment of the present invention, the working area 1a is arranged in a triangular shape, and the coil unit 1 is arranged in each triangular area, and the working side wire segment 11 in each coil unit 1 is bent toward the middle of the working area 1a, so that the coil units 1 are distributed on each side of the working area 1a, so that there are sufficient magnetic flux lines distributed on each side of the working area 1a, and the heating uniformity is better. Moreover, because the working side wire segment 11 is bent toward the middle of the working area 1a, the problem of poor heating effect in the middle of the working area 1a can be improved.

[0125] See also Fig.17 In an embodiment of the present invention, the working area 1a is arranged in a circular shape, and the working side wire segment 11 in each coil unit 1 is bent toward the middle of the working area 1a, so that the coil units 1 are distributed on each side of the working area 1a, so that there are sufficient magnetic flux lines distributed on each side of the working area 1a, and the heating uniformity is better. Moreover, because the working side wire segment 11 is bent toward the middle of the working area 1a, the problem of poor heating effect in the middle of the working area 1a can be improved.

[0126] Fig.17a The outer dotted box in Fig.18 The edge of the thermal field area of ​​the coil structure 100.

[0127] See also Fig.18 In an embodiment of the present invention, the working area 1a is arranged in a square shape, and the coil units 1 are distributed in each corner area of ​​the square, and the working side wire segments 11 in each coil unit 1 are bent toward the middle of the working area 1a, so that the coil units 1 are distributed on each side of the working area 1a, so that there are sufficient magnetic flux lines distributed on each side of the working area 1a, and the heating uniformity is better. Moreover, because the working side wire segments 11 are bent toward the middle of the working area 1a, the problem of poor heating effect in the middle of the working area 1a can be improved.

[0128] In an embodiment of the present invention, Fig.16 , Fig.17 , Fig.18 and Fig. 20 Among the multiple coil units 1, the current directions of the working side wire segments 11 of at least one pair of adjacent coil units 1 are opposite, so that the directions of the magnetic flux lines at the junctions of the adjacent coil units 1 are the same, and they can be superimposed on each other to form a strong magnetic field area, which can achieve concentrated heating at a specific position.

[0129] In an embodiment of the present invention, Fig.19 , Fig.21 and Fig. 22 Among the plurality of coil units 1, the current directions of the working side wire segments 11 of at least one pair of adjacent coil units 1 are the same, so that the directions of the magnetic flux lines at the junction of the adjacent coil units 1 are opposite and can cancel each other out, thus avoiding the formation of a strong magnetic field area and causing the problem of concentrated heating. Fig.21 The outer dotted frame in is the edge of the thermal field area of ​​the coil structure 100.

[0130] 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: It includes at least one coil unit, the coil unit has multiple 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 currents, wherein multiple first wire segments are respectively set as working side wire segments, and multiple working side wire segments are distributed along a first surface area to jointly constitute a working side wire group, one side of the working side wire group is used to correspond to a heating container to perform electromagnetic heating on the heating container, and at least part of the second wire segments are set as deviating side wire segments, and the deviating side wire segments are set away from the first surface area.

2. The coil structure according to claim 1, characterized in that: The deviating side wire segment is arranged to deviate from the first surface area toward the other side of the working side wire group; and / or, All of the first wire segments are set as the working side wire segments; and / or, All of the second conductor segments are configured as the deviating side conductor segments.

3. The coil structure according to claim 1, characterized in that: The second wire segments of at least a portion of the coils are bent relative to the first wire segments, so that the deviating-side wire segments are arranged to deviate from the first surface area.

4. The coil structure according to claim 3, characterized in that: At least part of the second wire segments of the coils are bent toward the other side of the working-side wire group relative to the first wire segments, so that the deviating-side wire segments are arranged to deviate from the first surface area.

5. The coil structure according to claim 1, characterized in that: The deviating side wire segment is located at the other side of the working side wire group and is arranged opposite to the working side wire group.

6. The coil structure according to claim 5, characterized in that: The coil unit is arranged flat to have a thickness direction; The working-side wire segment and the deviation-side wire segment are located in a thickness direction of the coil unit.

7. The coil structure according to claim 5, characterized in that: The coil structure also includes a bracket; The coil winding is mounted on the support, and the working side wire segment and the deviating side wire segment are located on opposite sides of the support.

8. The coil structure according to claim 7, characterized in that: The material of at least a part of the structure of the bracket is set to be soft magnetic material.

9. The coil structure according to any one of claims 1 to 8, characterized in that: The number of the working-side wire segments is greater than 3.

10. The coil structure according to any one of claims 1 to 8, characterized in that: There is a winding gap between at least one pair of adjacent working-side wire segments.

11. The coil structure according to claim 10, characterized in that: At least one of the winding gaps is greater than or equal to 2 mm.

12. The coil structure according to any one of claims 1 to 8, characterized in that: The ratio of the number of the working side wire segments to the number of the deviation side wire segments is B, and 0.8≤B≤1.

2.

13. The coil structure according to claim 12, characterized in that: 1＜B≤1.2。 14. The coil structure according to any one of claims 1 to 8, characterized in that: The ratio of the length of the working side wire segment to the length of the deviation side wire segment is L, and L>1.

15. The coil structure according to claim 14, characterized in that: 1＜L≤5。 16. The coil structure according to claim 14, characterized in that: In at least one pair of the deviated-side wire segment and the working-side wire segment connected to each other, the length of the working-side wire segment is greater than the length of the deviated-side wire segment.

17. The coil structure according to claim 16, characterized in that: The deviated side wire segment is arranged in a straight line; The working side wire segment is arranged in a curve.

18. The coil structure according to any one of claims 5 to 8, characterized in that: The distance between the working side wire segment and the deviation side wire segment is D, 1mm<D<50mm.

19. The coil structure according to any one of claims 1 to 8, characterized in that: The working side wire segments of the coil unit are distributed in a working area.

20. The coil structure according to claim 19, characterized in that The working area is arranged in a square, circular, triangular, elliptical or racetrack shape.

21. The coil structure according to claim 19, characterized in that The coil unit is provided with one; The working side wire segment of the coil unit extends from one end of the working area to the other end of the working area.

22. The coil structure according to claim 21, characterized in that The working side wire segments are arranged in a straight line; or, The working area has a middle portion, and the working side wire segments located on both sides of the working area are bent from both ends to the middle segment away from or close to the middle portion of the working area.

23. The coil structure according to claim 19, characterized in that The coil unit is provided in plurality.

24. The coil structure according to claim 23, characterized in that The center lines of the working side wire groups of at least two of the coil units are arranged at an inclined angle.

25. The coil structure according to claim 24, characterized in that At least two of the coil units are distributed along the circumference of the working area.

26. The coil structure according to claim 25, characterized in that In at least two of the coil units, at least one of the working-side wire segments is bent toward the center of the working area.

27. The coil structure according to claim 23, characterized in that Among the plurality of coil units, current directions of working-side wire segments of at least one pair of adjacent coil units are opposite.

28. The coil structure according to claim 23, characterized in that Among the plurality of coil units, current directions of working-side wire segments of at least one pair of adjacent coil units are the same.

29. An electromagnetic heating cooking device, characterized in that: Comprising a coil structure as claimed in any one of claims 1 to 28.

30. The electromagnetic heating cooking device according to claim 29, characterized in that: The electromagnetic heating cooking device further includes a shielding structure arranged on the outer side of the deviating side wire segment.

31. The electromagnetic heating cooking device according to claim 30, characterized in that: The distance between the shielding structure and the deviated side conductor segment is less than 50 mm.

32. The electromagnetic heating cooking device according to claim 30 or 31, characterized in that: The material of the shielding structure includes metal material.

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