Coil panel assembly and electromagnetic heating device

Abstract

The utility model discloses a coil panel assembly and an electromagnetic heating device, and relates to the technical field of electromagnetic heating, the coil panel assembly comprises a support and at least one pair of winding units, each winding unit is annularly arranged and is provided with a first winding ring segment close to the center of the support and a second winding ring segment close to the edge of the support, in the pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middles of the two winding units, a closed magnetic field is formed between the two winding units, and in at least one winding unit, the magnetic pole formed in the middle of the winding unit is close to one side of the corresponding second winding ring section. The magnetic field can be coupled with the position corresponding to the pot wall from the side close to the edge of the support, the heating uniformity of the pot bottom and the pot wall of the pot is improved, and the problems that the heating effect of an existing induction cooker on the pot wall is poor, and the heat of the pot wall is difficult to increase even if the diameter of a wire coil is increased are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic heating, and particularly relates to a coil disc assembly and an electromagnetic heating device. Background Art

[0002] The conventional induction cooker coil disc has a single-ring spiral winding structure. Its heating effect on cookware is limited by its own physical electromagnetic field, and the heat is concentrated inward. When the item to be heated is a wok, due to the too large distance between the side wall discs, the heat cannot be concentrated on the pot wall, and the heating effect of the pot wall is very poor. Even if the diameter of the coil disc is increased, it is difficult to increase the heat on the pot wall. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a coil disc assembly and an electromagnetic heating device, aiming to solve the problem that the existing induction cooker has a poor heating effect on the pot wall, and it is difficult to increase the heat on the pot wall even if the diameter of the coil disc is increased.

[0004] To achieve the above purpose, the coil disc assembly proposed by the utility model includes:

[0005] A bracket; and,

[0006] At least one pair of winding units, each pair of winding units includes two winding units arranged on the bracket and distributed along the circumferential direction of the bracket. Each winding unit is annularly arranged, and it has a first winding ring section close to the center of the bracket and a second winding ring section close to the edge of the bracket;

[0007] In the pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middle of the two winding units. And in at least one winding unit, at least part of the width of the first winding ring section is d1, and at least part of the width of the second winding ring section is d2, where d1 is greater than d2.

[0008] The utility model also provides a coil disc assembly, including:

[0009] A bracket; and,

[0010] At least one pair of winding units, each pair of winding units includes two winding units arranged on the bracket and distributed along the circumferential direction of the bracket. Each winding unit is annularly arranged, and it has a first winding ring section close to the center of the bracket and a second winding ring section close to the edge of the bracket;

[0011] In the pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middle of the two winding units. And in at least one winding unit, the winding center of the winding unit is located on one side close to the second winding ring section of its geometric center.

[0012] In one embodiment, the winding gap of at least a part of the first winding loop segment is larger than the winding gap of the second winding loop segment.

[0013] In one embodiment, a winding structure for winding the winding unit is provided on the bracket, and the winding structure includes:

[0014] A first winding part, including a plurality of first winding grooves formed on one side of the bracket;

[0015] A second winding part, defining a second winding groove with a notch facing the circumferential side of the bracket between the second winding part and the bracket; and,

[0016] Wherein, the first winding loop segment is correspondingly arranged in the plurality of first winding grooves, and the second winding loop segment is limited in the second winding groove.

[0017] In one embodiment, a winding structure for winding the winding unit is provided on the bracket, and the winding structure includes:

[0018] At least two third winding parts, which are spaced apart in the direction from the center of the bracket to the outside, and each of the third winding parts defines a third winding groove with a notch facing the circumferential side of the bracket between the third winding part and the bracket; and,

[0019] A fourth winding part, defining a fourth winding groove with a notch facing the circumferential side of the bracket between the fourth winding part and the bracket; and,

[0020] Wherein, a part of the first winding loop segment is limited in one of the third winding grooves, another part of the first winding loop segment is limited in another one of the third winding grooves, and the second winding loop segment is limited in the fourth winding groove.

[0021] In one embodiment, the number of layers of the winding unit at the first winding loop segment is N1, and the number of layers of the winding unit at the second winding loop segment is N2, wherein N2 is greater than N1.

[0022] In one embodiment, the first winding loop segment protrudes towards the center of the bracket from both ends to the middle segment.

[0023] In one embodiment, the included angle formed at the bending part of the first winding loop segment is A, and 80° ≤ A ≤ 100°.

[0024] In one embodiment, the winding directions of at least 3 / 4 turns of the coils in the winding unit are arranged in the same direction.

[0025] In one embodiment, a plurality of the winding units are arranged in series or in parallel.

[0026] In one embodiment, in a pair of the winding units, the two winding units include:

[0027] A first winding unit having a first input end, a first winding, and a first output end. The first winding is wound outward in sequence from the first input end along a first clockwise direction, and the first output end is connected to the outer end of the first winding; and,

[0028] A second winding unit having a second input end, a second winding, and a second output end. The second winding is wound outward in sequence from the second input end along a second clockwise direction opposite to the first clockwise direction, and the second output end is connected to the outer end of the second winding.

[0029] In one embodiment, the coil disk assembly further includes a magnet structure. The magnet structure includes two magnetic pole ends disposed corresponding to the middle parts of the two winding units in a pair of the winding units, and an extension portion located between the two magnetic pole ends.

[0030] In one embodiment, the two magnetic pole ends and the extension portion are integrally provided; or,

[0031] The extension portion includes two connecting portions respectively integrally provided with the two magnetic pole ends.

[0032] In one embodiment, the coil disk assembly further includes a shielding structure. The shielding structure includes a first shielding portion disposed on the side of the winding unit facing the bracket.

[0033] In one embodiment, the shielding structure further includes a second shielding portion disposed around each pair of the winding units.

[0034] In one embodiment, the material of at least part of the shielding structure includes one of ferrite, nanocrystalline, and silicon steel sheet.

[0035] The present utility model further provides an electromagnetic heating device, including a coil disk assembly. The coil disk assembly includes:

[0036] A bracket; and,

[0037] At least one pair of winding units. Each pair of winding units includes two winding units disposed on the bracket and distributed along the circumferential direction of the bracket. Each winding unit is annularly arranged and has a first winding ring segment close to the center of the bracket and a second winding ring segment close to the edge of the bracket;

[0038] In the pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middle parts of the two winding units. And in at least one of the winding units, the width of at least some segments of the first winding ring segment is d1, and the width of at least some segments of the second winding ring segment is d2, where d1 is greater than d2.

[0039] The present utility model further provides an electromagnetic heating device, including a coil disc assembly, and the coil disc assembly includes:

[0040] A bracket; and,

[0041] At least one pair of winding units, each pair of winding units includes two winding units arranged on the bracket and distributed along the circumferential direction of the bracket. Each winding unit is arranged in a ring shape and has a first winding ring segment close to the center of the bracket and a second winding ring segment close to the edge of the bracket;

[0042] In the pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middle parts of the two winding units. And in at least one of the winding units, the winding center of the winding unit is located on one side close to the second winding ring segment of its geometric center.

[0043] In the technical solution provided by the present utility model, the coil disc assembly includes a bracket and a plurality of winding units. The plurality of winding units are arranged on the bracket. The plurality of winding units are distributed along the circumferential direction of the bracket. Each winding unit is arranged in a ring shape and has a first winding ring segment close to the center of the bracket and a second winding ring segment close to the edge of the bracket. In a pair of winding units, the current directions of the two winding units are set to be opposite, so that opposite magnetic poles are formed in the middle parts of the two winding units, thereby forming a closed magnetic field between the two winding units. In at least one winding unit, the magnetic pole formed in the middle part thereof is on one side close to the corresponding second winding ring segment, so that the magnetic field can couple with the position of the corresponding pot wall from the side close to the edge of the bracket, increasing the heating range of the pot wall and improving the uniformity of heating the bottom and the wall of the pot, so as to solve the problem that the existing induction cooker has a poor heating effect on the pot wall and it is difficult to increase the heat of the pot wall even if the diameter of the coil disc is increased. Description of the Drawings

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0045] Figure 1 Schematic perspective view of an embodiment of the coil disk assembly provided by the present utility model;

[0046] Figure 2 For Figure 1 Schematic diagram of the coil disk assembly and the cookware in ;

[0047] Figure 3 For Figure 1 Schematic diagram of multiple winding units in ;

[0048] Figure 4 For Figure 3 Schematic diagram of the current direction after multiple winding units in are energized;

[0049] Figure 5 For Figure 1 Partial structural schematic diagram of the coil disk assembly in ;

[0050] Figure 6 For Figure 1 Schematic diagram of another perspective of the coil disk assembly in ;

[0051] Figure 7 For Figure 6 Top view schematic diagram of the coil disk assembly in ;

[0052] Figure 8 For Figure 1 Schematic diagram of the magnetic field formed by each pair of winding units in ;

[0053] Figure 9 Structural schematic diagram of another embodiment of the coil disk assembly provided by the present utility model;

[0054] Figure 10 For Figure 9 Cross-sectional schematic diagram of the coil disk assembly in .

[0055] Explanation of the reference numerals in the drawings:

[0056] 100, coil disk assembly; 1, bracket; 11, second winding part; 12, third winding part; 13, fourth winding part; 2, winding unit; 201, first winding ring segment; 202, second winding ring segment; 21, first winding unit; 211, first input end; 212, first winding; 213, first output end; 22, second winding unit; 221, second input end; 222, second winding; 223, second output end; 3, shielding structure; 31, first shielding part; 41, magnetic pole end; 42, extension part;

[0057] 200, cookware; 2001, bottom of the pot; 2002, pot wall.

[0058] The realization, functional features and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Detailed implementation manners

[0059] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0060] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0061] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0062] The conventional induction cooker coil disk has a single-ring spiral winding structure, and its heating effect on cookware is limited by its own physical electromagnetic field, and the heat is concentrated inward. When the item to be heated is a wok, due to the too large distance between the side wall disks, the heat cannot be concentrated on the pot wall, and the heating effect of the pot wall is very poor. Even if the diameter of the coil disk is increased, it is difficult to increase the heat on the pot wall.

[0063] To solve this technical problem, the present utility model provides a coil disk assembly to solve the problem that the existing induction cooker has a poor heating effect on the pot wall, and it is difficult to increase the heat on the pot wall even if the diameter of the coil disk is increased.

[0064] Please refer to Figures 1 to 4, in a coil disk assembly 100 provided by the present utility model, the coil disk assembly 100 includes a bracket 1 and at least a pair of winding units 2. Each pair of the winding units 2 includes two winding units 2 disposed on the bracket 1 and circumferentially distributed along the bracket 1. Each of the winding units 2 is annularly arranged and has a first winding loop segment 201 near the center of the bracket 1 and a second winding loop segment 202 near the edge of the bracket 1. In the pair of winding units 2, the current directions of the two winding units 2 are set to be opposite so that opposite magnetic poles are formed in the middle of the two winding units 2. And in at least one of the winding units 2, the width of at least a partial segment of the first winding loop segment 201 is d1, and the width of at least a partial segment of the second winding loop segment 202 is d2, where d1 is greater than d2.

[0065] In another coil disk assembly 100 provided by the present utility model, the coil disk assembly 100 includes a bracket 1 and at least a pair of winding units 2. Each pair of the winding units 2 includes two winding units 2 disposed on the bracket 1 and circumferentially distributed along the bracket 1. Each of the winding units 2 is annularly arranged and has a first winding loop segment 201 near the center of the bracket 1 and a second winding loop segment 202 near the edge of the bracket 1. In the pair of winding units 2, the current directions of the two winding units 2 are set to be opposite so that opposite magnetic poles are formed in the middle of the two winding units 2. And in at least one of the winding units 2, the winding center of the winding unit 2 is located on the side closer to the second winding loop segment 202 of its geometric center.

[0066] It should be noted that in the prior art, a conventional coil disk is arranged in a circular spiral winding structure, and the winding gaps between two adjacent turns are uniform and the same. Then, when the conventional coil disk is coupled with a cookware, especially a wok-type cookware, due to the limitation of the shape characteristics of the wok, the side wall of the cookware is far from the bottom, and the corresponding magnetic field density of the coil disk where it is located is small, resulting in low heating efficiency.

[0067] It should be pointed out that the shapes of the winding units 2 in the "multiple winding units 2" mentioned in this application can be set to be the same or different. Each of the winding units 2 is formed by winding multiple turns of coils. Each turn of coil in each of the winding units 2 can be regarded as an annular structure. Of course, the annular structure is not only limited to being circular, it can be square or elliptical. Each of the winding units 2 can be laid flat along a surface area, and the surface area can be a plane or a curved surface. Each of the winding units 2 can also be bent, and specifically can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0068] "The multiple winding units 2 are circumferentially distributed along the bracket 1" can mean that the multiple winding units 2 are distributed in a ring shape on the same side of the bracket 1, or that some of the winding units 2 are arranged on one side of the bracket 1 and the other part of the winding units 2 are arranged on the other side of the bracket 1. However, as long as they are distributed in a ring shape on the projection plane of the bracket 1, they can all be regarded as "the multiple winding units 2 are circumferentially distributed along the bracket 1".

[0069] "The direction of the current flow" refers to the flow direction of the current in the winding unit 2 along the clockwise or counterclockwise direction. "The directions of the currents in two of the winding units 2 are set to be opposite" means that when the current direction in one winding unit 2 is clockwise, the current direction in the other winding unit 2 is counterclockwise.

[0070] It should be noted that according to Ampere's rule: Hold the energized solenoid with the right hand and let the four fingers point to the direction of the current. Then the end pointed by the thumb is the N pole of the energized solenoid. Thus, please refer to Figure 8 , when the directions of the currents in two of the winding units 2 are set to be opposite, a closed magnetic field is formed between the two winding units 2. For example, if one of the two winding units 2 is set as the first winding unit and the other is set as the second winding unit, when the first winding unit and the second winding unit are arranged horizontally, a magnetic pole N pole is formed on the upper side of the first winding unit and an S pole is formed on the lower side. At the same time, an S pole is formed on the upper side of the second winding unit and an N pole is formed on the lower side; thus, the magnetic field lines go from the N pole of the first winding unit to the S pole of the second winding unit, then from the S pole of the second winding unit to the N pole, then from the N pole of the second winding unit to the S pole of the first winding unit, and then from the S pole of the first winding unit back to the N pole of the first winding unit, thereby forming a closed magnetic field.

[0071] Then, when a pair of the winding units 2 is energized, the closed magnetic field formed between the two shaped magnetic poles formed by the two winding units 2 can interact with the pot wall that is far from the winding units 2, realizing the heating of the pot wall.

[0072] The "width" in "at least part of the width of the first winding ring segment 201 is d1, and at least part of the width of the second winding ring segment 202 is d2, and d1 is greater than d2" refers to the distance between the innermost turn of the multi-turn coil of the winding unit 2 and the outermost turn of the multi-turn coil in the direction outward from the geometric center of the winding unit 2. For specific details, please refer to Figure 7As shown, it is possible to reduce the winding length in the corresponding area of the second winding loop segment 202; it is also possible that when the winding segments arranged adjacent to each other in each winding loop segment are arranged in parallel between the winding of the first winding loop segment 201 and the second winding loop segment 202, the winding gap of the first winding loop segment 201 is set to be greater than the winding gap of the second winding loop segment 202; of course, when the winding segments arranged adjacent to each other in each winding loop segment are not arranged in parallel, it will cause the winding gap to be uneven, but other partial winding segments can be adjusted adaptively, and finally d1 is made greater than d2.

[0073] "The winding center of the winding unit 2 is located on the side close to the second winding loop segment 202 of its geometric center", which can be achieved by setting the winding unit 2 into shapes such as a quasi-sector or a quasi-triangle, and adjusting the geometric center by adjusting the shape of the winding unit 2.

[0074] It can be understood that according to Ampere's rule, the magnetic poles formed by the winding unit 2 correspond to the inner ring area of the ring. When "d1 is greater than d2" or "the winding center is located on the side close to the second winding loop segment 202 of its geometric center", the magnetic poles of the corresponding winding unit 2 are all formed in the area close to the outer periphery of the bracket, so as to achieve the largest possible heating range for the pot wall.

[0075] Of course, the specific methods for realizing that the width of the first winding loop segment 201 is set to be greater than the width of the second winding loop segment 202 and for realizing that the winding center of the winding unit 2 is located on the side close to the second winding loop segment 202 of its geometric center are not limited to the above examples. Those skilled in the art may make other changes under the inspiration of the technical essence of the embodiments of this specification, but as long as the functions and effects achieved are the same as or similar to those of the embodiments of this specification, they should all be covered within the protection scope of the embodiments of this specification.

[0076] In the technical solution provided by the present invention, by making the magnetic poles formed in the middle of at least one winding unit 2 close to the side of the corresponding second winding loop segment 202, the magnetic poles formed in the middle of the winding unit 2 can be closer to the edge side of the bracket 1, and can have a coupling effect with the position of the corresponding pot wall 2002, increasing the heating range of the pot wall 2002, and improving the heating uniformity of the bottom 2001 and the pot wall 2002 of the cookware 200, so as to solve the problem that the existing induction cooker has a poor heating effect on the pot wall and it is difficult to increase the heat of the pot wall even if the diameter of the wire coil is increased.

[0077] Further, in order to make the magnetic fields generated by the first winding loop segment 201 and the second winding loop segment 202 uniform, so that the cookware 200 is heated evenly, in this embodiment, the winding gap of at least part of the first winding loop segment 201 is greater than the winding gap of the second winding loop segment 202. With such a setting, only the winding gap of the second winding loop segment 202 needs to be adjusted and set to be denser, so that the magnetic field generated corresponding to the second winding loop segment 202 is greater than the magnetic field generated corresponding to the first winding loop segment 201, and at the same time, the magnetic field generated by the second winding loop segment 202 can be distributed more evenly in the magnetic field interval, so that the areas acting on the cookware wall 2002 are heated evenly.

[0078] Specifically, in a specific embodiment, please refer to Figure 1 , a winding structure for the winding unit 2 to wind around is provided on the bracket 1. The winding structure includes a first winding part and a second winding part 11. The first winding part includes a plurality of first winding grooves formed on one side of the bracket 1; a second winding groove with a notch facing the circumferential side of the bracket 1 is defined between the second winding part 11 and the bracket 1; wherein, the first winding loop segment 201 is correspondingly arranged in the plurality of first winding grooves, and the second winding loop segment 202 is limited in the second winding groove.

[0079] In this way, on the bracket 1, the first winding loop segment 201 can be wound in the first winding groove in a sparse winding manner, and the second winding loop segment 202 can be limited in the first winding groove in a side winding manner.

[0080] Specifically, in another specific embodiment, please refer to Figure 9 and Figure 10 , a winding structure for the winding unit 2 to wind around is provided on the bracket 1. The winding structure includes at least two third winding parts 12 and a fourth winding part 13. The at least two third winding parts 12 are spaced apart in the direction from the center of the bracket 1 to the outside. A third winding groove with a notch facing the circumferential side of the bracket 1 is defined between each third winding part 12 and the bracket 1; a fourth winding groove with a notch facing the circumferential side of the bracket 1 is defined between the fourth winding part 13 and the bracket 1; wherein, a part of the first winding loop segment 201 is limited in one of the third winding grooves, another part of the first winding loop segment 201 is limited in another third winding groove, and the second winding loop segment 202 is limited in the fourth winding groove.

[0081] Thus, on the bracket 1, a part of the first winding loop segment 201 can be wound around one of the third winding grooves in a side-winding manner, and the other part can also be wound around the other third winding groove in a side-winding manner. The second winding loop segment 202 can also be defined in the fourth winding groove in a side-winding manner. In order to make the magnetic field density generated by the first winding loop segment 201 less than that generated by the second winding loop segment 202, the distances between the two third winding grooves can be set to be widened, so that the width of the first winding loop segment 201 is set to be less than the width of the second winding loop segment 202.

[0082] Further, in an embodiment of the present invention, the number of layers of the winding unit 2 at the first winding loop segment 201 is N1, and the number of layers of the winding unit 2 at the second winding loop segment 202 is N2, where N2 is greater than N1.

[0083] Since the winding unit 2 is annularly arranged, the number of turns of the first winding loop segment 201 and the second winding loop segment 202 is the same. When N2 is greater than N1, it can be understood that the second winding loop segment 202 is higher than the first winding loop segment 201 in height. Then, the second winding loop segment 202 can also be made smaller than the first winding loop segment 201 in width, so that the magnetic pole formed in the middle of the winding unit 2 is close to the side corresponding to the second winding loop segment 202.

[0084] Further, in an embodiment of the present invention, both ends of the first winding loop segment 201 protrude towards the center of the bracket 1 from both ends to the middle section.

[0085] It should be noted that "protruding" means protruding more towards the center compared to the arcs at both ends of the first winding loop segment 201. With this setting, multiple first winding loop segments 201 all protrude in the direction of approaching each other, thus avoiding the formation of a weak magnetic field area in the inner surrounding area formed by multiple winding units 2.

[0086] In an actual application scenario, when the cookware is small and cannot cover the area corresponding to the second winding loop segment 202, cookware of different diameters can all achieve heating corresponding to the area where the first winding loop segment 201 is located.

[0087] Further, in an embodiment of the present invention, the included angle formed at the bending portion of the first winding loop segment 201 is A, and 80° ≤ A ≤ 100°.

[0088] The heating of the bottom 2001 of the cookware is achieved by the magnetic induction regions generated by the wire segments of two adjacent winding units 2 that are close to each other and the cookware 200. If the angle A is too large, correspondingly, the number of the winding units 2 will decrease, and the number of the formed magnetic induction regions will also decrease accordingly, resulting in poor effects on the heating efficiency of the cookware 200 and the even heating of the bottom 2001.

[0089] If the angle A is too small, the distance between the two bent segments of the first winding ring segment 201 is relatively close, and the current directions of the two bent segments tend to be opposite in the radial direction of the bracket 1. The magnetic field of the first winding ring segment 201 itself will decrease, and the energy efficiency will be reduced.

[0090] Furthermore, in the embodiment of the present utility model, the winding directions of at least 3 / 4 turns of the coils in the winding unit 2 are set to be the same.

[0091] It can be understood that when the cookware 200 is placed, in the area required for stir-frying the cookware 200, the food is more likely to gather at the bottom of the cookware 200. Thus, the area of the heating region formed by multiple first winding ring segments 201 in the middle of the corresponding bracket 1 is larger than the area of the annular heating region formed by multiple second winding ring segments 202 at the edge of the corresponding bracket 1, enabling the coil disc assembly 100 to better adapt to the actual stir-frying cooking scenario.

[0092] In this embodiment, multiple winding units 2 are arranged in series or in parallel.

[0093] When multiple winding units 2 are arranged in series, it is only necessary to adjust the winding direction to achieve that the current directions of adjacent winding units 2 are opposite when energized. Specifically, please refer to Figure 4 and Figure 7 , in an embodiment, two adjacent winding units 2 include a first winding unit 21 and a second winding unit 22. The first winding unit 21 has a first input end 211, a first winding 212, and a first output end 213. The first winding 212 is sequentially wound outward from the first input end 211 along the first clockwise direction, and the first output end 213 is connected to the outer end of the first winding 212. The second winding unit 22 has a second input end 221, a second winding 222, and a second output end 223. The second winding 222 is sequentially wound outward from the second input end 221 along the second clockwise direction opposite to the first clockwise direction, and the second output end 223 is connected to the outer end of the second winding 222. In this way, the winding method is simple and convenient for production and processing.

[0094] When multiple winding units 2 are arranged in parallel, each winding unit 2 can be independently controlled to be energized. This not only enables the current directions of adjacent winding units 2 to be set in the opposite direction, but also allows for flexible control of the current directions of each winding unit 2 in special scenarios, making the electrical control more flexible and convenient. Moreover, when some of the winding units 2 malfunction, the other winding units 2 are not affected and can still operate normally.

[0095] Specifically, in this embodiment, two adjacent winding units 2 are riveted, welded, or screwed together to ensure stable connection and conduction between the multiple winding units 2. Of course, other possible connection forms can also be adopted, which can be determined according to the actual situation. The embodiments of this specification do not limit this.

[0096] Furthermore, in the embodiment of the present utility model, the coil disk assembly 100 further includes a magnet structure. The magnet structure includes two magnetic pole ends 41 disposed corresponding to the middle parts of two winding units in a pair of winding units, and an extension part 42 located between the two magnetic pole ends 41.

[0097] The two magnetic pole ends 41 of the magnet structure allow more magnetic flux to pass through the magnetic circuit, reduce magnetic leakage, change the path of the magnetic circuit, make the magnetic field more concentrated and evenly distributed in the required area, thereby improving the efficiency and performance of the magnetic circuit. The magnetic field intensity in the middle parts of the two winding units can be increased, further enhancing the energy efficiency of the coupling effect with the cookware.

[0098] Specifically, in a specific embodiment, the two magnetic pole ends 41 and the extension part 42 are integrally provided. Since two different magnetic poles can be formed at the two ends of a magnet, each magnetic pole corresponds to the middle part of a corresponding winding unit 2. Because the magnetic poles formed in the middle parts of the two winding units 2 in a pair of winding units are arranged differently on the same side, by setting only one magnet, the magnetic field intensity of the two winding units can be enhanced, and the number of components can be minimized as much as possible.

[0099] In another embodiment, the extension part 42 includes two connecting parts respectively integrally provided with the two magnetic pole ends 41. In this way, by setting two magnets in a segmented manner, while the magnetic field intensity of the two winding units can be enhanced, more arrangement forms can be provided to adapt to more application scenarios of coil disks.

[0100] Furthermore, please refer to Figures 6 to 7 , in this embodiment, the coil disk assembly 100 further includes a shielding structure 3. The shielding structure 3 includes a first shielding part 31 disposed on the side of the winding unit 2 facing the bracket 1.

[0101] Thus, by providing the first shielding portion 31 with good magnetic permeability, it is beneficial to concentrate magnetic lines of force, improve the heating power and heating efficiency of the coil disc assembly 100. At the same time, it can play a role in isolating the coil magnetic field for the electronic components arranged below the coil disc assembly 100 to ensure the reliability of the electronic components. When the induction cooker with the coil disc assembly 100 is used on a metal tabletop, it can prevent the magnetic field below from heating the metal tabletop at the bottom of the induction cooker.

[0102] Furthermore, the shielding structure 3 further includes a second shielding portion provided around the periphery of each pair of the winding units. Since the magnetic poles formed in the middle of the winding unit 2 are close to one side of the corresponding second winding ring segment, the magnetic field of the part of the coil disc assembly 100 close to its periphery will correspondingly increase. In order to avoid electromagnetic interaction between the winding unit 2 and the magnetic-permeable utensils and articles on the peripheral side of the coil disc assembly 100, causing false heating, the magnetic field shielding can be well achieved by providing the second shielding portion.

[0103] Specifically, in this embodiment, the material of at least part of the structure of the first shielding portion 31 includes one of ferrite, nanocrystalline, and silicon steel sheet. The first shielding portion 31 can also be other soft magnetic materials, which can be specifically determined according to actual situations, and the embodiments of this specification do not limit this.

[0104] It can be understood that the shielding structure can include the magnet structure. While the magnet structure is magnetically conductive, it can also achieve magnetic shielding for each pair of the winding units 2 in the bottom and side perimeter directions.

[0105] The present invention also provides an electromagnetic heating device, which includes the coil disc assembly 100 and an electronic control device of the above various embodiments. The specific structure of the coil disc assembly 100 refers to the above embodiments. Since this electromagnetic heating device adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0106] The electromagnetic heating device can be an induction cooker or an electric pressure cooker, etc. Any electromagnetic heating device with the coil disc assembly 100 belongs to the electromagnetic heating device described in the present invention.

[0107] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A coil disk assembly, characterized in that: include: Bracket; as well as, At least one pair of winding units, each pair of the winding units comprising two winding units arranged on the bracket and distributed along the circumference of the bracket, each of the winding units being arranged in an annular shape and having a first winding ring segment close to the center of the bracket and a second winding ring segment close to the edge of the bracket; In the pair of winding units, the directions of the currents of the two winding units are set to be opposite so that opposite magnetic poles are formed in the middle parts of the two winding units, and in at least one of the winding units, the width of at least part of the first winding loop segment is d1, and the width of at least part of the second winding loop segment is d2, and d1 is greater than d2.

2. A coil disk assembly, characterized in that: include: Bracket; as well as, At least one pair of winding units, each pair of the winding units comprising two winding units arranged on the bracket and distributed along the circumference of the bracket, each of the winding units being arranged in an annular shape and having a first winding ring segment close to the center of the bracket and a second winding ring segment close to the edge of the bracket; In the pair of winding units, the directions of the currents of the two winding units are set to be opposite so that opposite magnetic poles are formed in the middle parts of the two winding units, and in at least one of the winding units, the winding center of the winding unit is located on the side of its geometric center close to the second winding loop segment.

3. The coil disk assembly according to claim 1 or 2, characterized in that: The winding gap of at least part of the first winding loop segment is larger than the winding gap of the second winding loop segment.

4. The coil disk assembly according to claim 3, characterized in that The bracket is provided with a winding structure for the winding unit to wind, and the winding structure includes: A first winding portion, comprising a plurality of first winding grooves formed on one side of the bracket; A second winding portion defines a second winding groove with the bracket and the notch faces the peripheral side of the bracket; and Wherein, the first winding loop segment is correspondingly arranged in the plurality of first winding grooves, and the second winding loop segment is limited to the second winding groove.

5. The coil disk assembly according to claim 3, characterized in that The bracket is provided with a winding structure for the winding unit to wind, and the winding structure includes: At least two third winding parts are spaced apart in a direction outward from the center of the bracket, and a third winding groove with a notch facing the peripheral side of the bracket is defined between each of the third winding parts and the bracket; and a fourth winding portion, defining a fourth winding groove with the bracket and the notch facing the peripheral side of the bracket; and Part of the first winding loop segment is limited to one of the third winding grooves, another part of the first winding loop segment is limited to another of the third winding grooves, and the second winding loop segment is limited to the fourth winding groove.

6. The coil disk assembly according to claim 1 or 2, characterized in that: The number of layers of the winding unit at the first winding loop segment is N1, and the number of layers of the winding unit at the second winding loop segment is N2, wherein N2 is greater than N1.

7. The coil disk assembly according to claim 1 or 2, characterized in that: The first winding ring segment is protruded from both ends to the middle section close to the center of the bracket.

8. The coil disk assembly according to claim 7, characterized in that The angle formed by the bending portion of the first winding loop segment is A, 80°≤A≤100°.

9. The coil disk assembly according to claim 1 or 2, characterized in that: The winding directions of at least 3 / 4 turns of the coil in the winding unit are arranged in a consistent manner.

10. The coil disk assembly according to claim 1 or 2, characterized in that: The plurality of winding units are arranged in series or in parallel.

11. The coil disk assembly according to claim 1 or 2, characterized in that: In a pair of the winding units, the two winding units include: A first winding unit has a first input end, a first winding and a first output end, wherein the first winding is sequentially wound outward from the first input end along a first clockwise direction, and the first output end is connected to an outer end of the first winding; and The second winding unit has a second input end, a second winding and a second output end. The second winding is wound outward in sequence from the second input end along a second clockwise direction opposite to the first clockwise direction. The second output end is connected to the outer end of the second winding.

12. The coil disk assembly according to claim 1 or 2, characterized in that: The coil disk assembly further includes a magnet structure including two magnetic pole ends disposed corresponding to middle portions of two of the winding units in a pair of the winding units, and an extension portion located between the two magnetic pole ends.

13. The coil disk assembly according to claim 12, characterized in that The two pole ends and the extension portion are integrally arranged; or, The extension portion includes two connecting portions which are integrally arranged corresponding to the two magnetic pole ends.

14. The coil disk assembly according to claim 1 or 2, characterized in that: The coil disk assembly further includes a shielding structure including a first shielding portion disposed on a side of the winding unit facing the bracket.

15. The coil disk assembly according to claim 14, characterized in that The shielding structure further includes a second shielding portion disposed around the periphery of each pair of the winding units.

16. The coil disk assembly according to claim 14, characterized in that The material of at least a part of the shielding structure includes one of ferrite, nanocrystal and silicon steel sheet.

17. An electromagnetic heating device, characterized in that: Comprising the coil disk assembly according to any one of claims 1 to 16.

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