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, a plurality of winding units and a shielding structure, each winding unit is annularly arranged and is provided with a first winding ring section close to the center of the support and a second winding ring section close to the edge of the support, and in one pair of winding units, the current directions of the two winding units are opposite, and the shielding structure is arranged between the two winding units. 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, and the magnetic pole formed in the middle of the winding unit is close to the other side of the corresponding second winding ring section. Therefore, the magnetic field can be coupled with the position corresponding to the pot wall from one side close to the edge of the bracket, so that the problems that the heating effect of the existing induction cooker on the pot wall is poor, and a relatively large magnetic field is easily generated around the coil panel to cause mistaken heating 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 workpiece 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, and it is also easy to generate a large magnetic field around the coil disc, resulting in situations such as misheating. Summary of the Invention

[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 is easy to generate a large magnetic field around the coil disc, resulting in misheating.

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

[0005] A bracket having two sides in a first direction;

[0006] A plurality of winding units are arranged on at least one side of the bracket. The plurality of winding units form at least one pair of winding units. Each pair of winding units includes two winding units circumferentially distributed along 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; and,

[0007] A shielding structure includes a lateral shielding structure arranged outside the plurality of winding units. The lateral shielding structure extends beyond the plurality of winding units on both sides of the bracket or is flush with the plurality of winding units;

[0008] Wherein, 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 segment is d1, and at least part of the width of the second winding ring segment is d2, and d1 is greater than d2.

[0009] The utility model also provides a coil disc assembly, including:

[0010] A bracket having two sides in a first direction;

[0011] A plurality of winding units are arranged on at least one side of the bracket. The plurality of winding units form at least a pair of winding units. Each pair of the winding units includes two winding units arranged on the bracket and distributed along the circumferential direction of the bracket. Each of the winding units is arranged in a ring shape and 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; and,

[0012] A shielding structure includes a lateral shielding structure arranged on the periphery of the plurality of winding units. The lateral shielding structure extends beyond the plurality of winding units on both sides of the bracket or is flush with the plurality of winding units.

[0013] Wherein, 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 of the winding units, the winding center of the winding unit is located on one side of its geometric center close to the second winding ring section.

[0014] In one embodiment, the winding gap of at least part of the first winding ring section is larger than the winding gap of the second winding ring section.

[0015] In one embodiment, a winding structure for winding the winding units is arranged on the bracket. The winding structure includes:

[0016] A first winding part includes a plurality of first winding grooves formed on one side of the bracket;

[0017] A second winding part defines a second winding groove with a notch facing the circumferential side of the bracket between it and the bracket; and,

[0018] Wherein, the first winding ring section is correspondingly arranged in the plurality of first winding grooves, and the second winding ring section is limited in the second winding groove.

[0019] In one embodiment, the distance between the lateral shielding structure and the corresponding second winding ring section is d, and 0 < d ≤ 50 mm.

[0020] In one embodiment, the lateral shielding structure includes a plurality of shielding sheets correspondingly arranged on the periphery of the plurality of winding units and arranged at intervals.

[0021] In one embodiment, in the circumferential direction of the bracket, the central angle corresponding to the shielding sheet is θ1, and the central angle corresponding to the corresponding winding unit is θ2. The ratio of θ1 to θ2 is (1 to 10):(8 to 10).

[0022] In one embodiment, 30° ≤ θ1 ≤ 50°, and 85° ≤ θ2 ≤ 90°.

[0023] In one embodiment, the lateral shielding structure includes a shielding ring disposed around the periphery of the plurality of winding units.

[0024] In one embodiment, the shielding structure further includes a bottom shielding structure disposed on one side of the plurality of winding units in a first direction.

[0025] In one embodiment, the bottom shielding structure includes:

[0026] A magnet structure disposed on one side of the plurality of winding units in a first direction; and / or,

[0027] A shielding base disposed on one side of the plurality of winding units in a first direction, and one side of the bracket is mounted on the shielding base.

[0028] In one embodiment, the shielding base is provided on one side facing the bracket for mounting the lateral shielding structure.

[0029] In one embodiment, the plurality of winding units are arranged in series or in parallel.

[0030] The present utility model further provides an electromagnetic heating device, including a coil disc assembly, and the coil disc assembly includes:

[0031] A bracket having two sides in a first direction;

[0032] A plurality of winding units disposed on at least one side of the bracket, the plurality of winding units form at least one pair of winding units, each pair of winding units includes two winding units distributed along the circumferential direction of the bracket, and each winding unit is annularly arranged, 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; and,

[0033] A shielding structure including a lateral shielding structure disposed around the plurality of winding units, the lateral shielding structure extends beyond the plurality of winding units on both sides of the bracket or is flush with the plurality of winding units;

[0034] Wherein, 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 of the winding units, at least a partial segment of the first winding ring segment has a width of d1, and at least a partial segment of the second winding ring segment has a width of d2, and d1 is greater than d2.

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

[0036] A bracket having two sides in a first direction;

[0037] A plurality of winding units are arranged on at least one side of the bracket. The plurality of winding units form at least one pair of winding units. Each pair of winding units includes two winding units distributed along the circumferential direction of the bracket. Each winding unit is arranged in a ring shape and 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; and,

[0038] A shielding structure includes a lateral shielding structure arranged outside the plurality of winding units. The lateral shielding structure extends beyond the plurality of winding units on both sides of the bracket or is flush with the plurality of winding units.

[0039] Wherein, 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 of the two winding units. And in at least one winding unit, the winding center of the winding unit is located on the side close to the second winding ring section of its geometric center.

[0040] In the technical solution of 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 section close to the center of the bracket and a second winding ring section 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 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 is on the side close to the corresponding second winding ring section, 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. By arranging a lateral shielding structure outside the plurality of winding units, and the lateral shielding structure extends beyond the plurality of winding units on both sides of the bracket or is flush with the plurality of winding units, it can better isolate the coil magnetic field from the metal devices outside the coil disc assembly, avoiding the problem of misheating of the surrounding metal utensils when the electromagnetic heating device works. Description of the Drawings

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0042] Figure 1 A top view structural schematic diagram of an embodiment of a coil disc assembly provided by the present invention;

[0043] Figure 2 For Figure 1 An exploded view of a coil disc assembly in

[0044] Figure 3 For Figure 1 A structural schematic diagram of the current direction after multiple winding units are energized in

[0045] Figure 4 For Figure 1 A structural schematic diagram in which the lateral shielding structure extends beyond multiple winding units on both sides of the bracket;

[0046] Figure 5 For Figure 1 A schematic diagram of the winding structure provided on the bracket in

[0047] Figure 6 A top view structural schematic diagram of another embodiment of a coil disc assembly provided by the present invention;

[0048] Figure 7 For Figure 1 An exploded view of a bottom shielding structure installed on one side of the winding unit in

[0049] Figure 8 For Figure 7 A cross-sectional schematic diagram of the winding unit and the bottom shielding structure in

[0050] Figure 9 For Figure 1 A schematic diagram of the coil disc assembly heating the side wall of the cookware in

[0051] Explanation of the reference numerals in the drawings:

[0052] 100. Coil disc assembly; 1. Bracket; 11. First side; 12. Second side; 13. First winding part; 14. Second winding part; 15. Positioning hole; 2. Winding unit; 21. First winding ring segment; 22. Second winding ring segment; 3. Shielding sheet; 4. Magnet structure; 5. Shielding ring; 6. Shielding seat; 61. Mounting hole; 201. Cookware.

[0053] The realization, functional features and advantages of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings. Detailed implementation manners

[0054] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with 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 embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0055] 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. If the specific posture changes, the directional indications will also change accordingly.

[0056] 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" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the 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 is contradictory 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.

[0057] The conventional induction cooker coil disk has a single-ring spiral winding structure, and its heating effect on the 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, and it is also easy to generate a large magnetic field around the coil disk, causing situations such as misheating.

[0058] In view of this, the present utility model proposes a coil disk assembly to solve the problems that the existing induction cooker has a poor heating effect on the pot wall and is prone to generating a large magnetic field around the coil disk, resulting in misheating.

[0059] Please refer to Figure 1 and Figure 2, in a coil disk assembly 100 provided by the present utility model, the coil disk assembly 100 includes a bracket 1, a plurality of winding units 2, and a shielding structure. The bracket 1 has two sides in a first direction. The plurality of winding units 2 are arranged on at least one side of the bracket 1. The plurality of winding units 2 form at least one pair of winding units 2. Each pair of the winding units 2 includes two winding units 2 circumferentially distributed along the bracket 1. Each winding unit 2 is annularly arranged and has a first winding ring section 21 close to the center of the bracket 1 and a second winding ring section 22 close to the edge of the bracket 1. In a 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. Refer to Figure 3 , and in at least one winding unit 2, at least a partial section of the first winding ring section 21 has a width of d1, and at least a partial section of the second winding ring section 22 has a width of d2, and d1 is greater than d2. The shielding structure includes a lateral shielding structure arranged outside the plurality of winding units 2. The lateral shielding structure extends beyond the plurality of winding units 2 on both sides of the bracket 1 (i.e., both sides in the thickness direction of the bracket 1. If the thickness direction of the bracket 1 is vertically distributed, it is in the upward and downward directions), or is flush with the plurality of winding units 2.

[0060] In the technical solution provided by the present utility model, by arranging a lateral shielding structure outside the plurality of winding units 2, and the lateral shielding structure extends beyond the plurality of winding units 2 on both sides of the bracket 1 or is flush with the plurality of winding units 2, it can better isolate the magnetic field of the coil from the metal devices outside the coil disk assembly, avoiding the problem of scalding caused by heating the surrounding metal utensils when the electromagnetic heating device works. By setting that in at least one winding unit 2, at least a partial section of the first winding ring section 21 has a width of d1, and at least a partial section of the second winding ring section 22 has a width of d2, and d1 is greater than d2, 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 perform a coupling effect with the position of the corresponding pot wall. Refer to Figure 9 , the heating range of the pot wall is increased, so that the heating uniformity of the bottom and the pot wall of the cooking pot 201 is improved, to solve the problem that the existing electromagnetic heating device 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 is increased.

[0061] In another coil disk assembly 100 provided by the present utility model, the coil disk assembly 100 includes a bracket 1, a plurality of winding units 2, and a shielding structure. The bracket 1 has two sides in a first direction. The plurality of winding units 2 are disposed on at least one side of the bracket 1. The plurality of winding units 2 form at least one pair of winding units 2. Each pair of the winding units 2 includes two winding units 2 circumferentially distributed along the bracket 1. Each winding unit 2 is annularly arranged and has a first winding loop segment 21 near the center of the bracket 1 and a second winding loop segment 22 near the edge of the bracket 1. In a 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 winding unit 2, the winding center of the winding unit 2 is located on one side of its geometric center closer to the second winding loop segment 22. The shielding structure includes a lateral shielding structure disposed outside the plurality of winding units 2. The lateral shielding structure extends beyond the plurality of winding units 2 on both sides of the bracket 1 or is flush with the plurality of winding units 2.

[0062] In the technical solution provided by the present utility model, by providing a lateral shielding structure outside the plurality of winding units 2, and the lateral shielding structure extends beyond the plurality of winding units 2 on both sides of the bracket 1 or is flush with the plurality of winding units 2, it can preferably isolate the coil magnetic field for the metal devices outside the coil disk assembly, and avoid the problem of scalding caused by heating the surrounding metal utensils when the electromagnetic heating device works. By setting the winding center of at least one winding unit 2 on one side of its geometric center closer to the second winding loop segment 22, the magnetic pole formed in the middle of the winding unit 2 can be closer to the edge side of the bracket 1, and can couple with the corresponding position of the pot wall, 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 electromagnetic heating device 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 disk is increased.

[0063] It should be noted that in the prior art, the conventional coil disk is set as a circular ring 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 pot, especially a frying pan type of pot, due to the limitation of the shape characteristics of the frying pan, the side wall of the pot is far from the bottom, and the corresponding magnetic field density of the coil disk is small, the heating efficiency is low. And during the working process of the electromagnetic heating device, if a relatively large current is applied to the coil disk, the magnetic field generated around the coil disk will also be large. For the outside of the coil disk, if there are metal devices, such as knives, spoons, etc., within the magnetic field range, they are very likely to be heated and cause scalding.

[0064] It should be noted that when it is said in this application that "the two sides of the bracket 1 are located in the first direction", it means that the bracket 1 has a first side 11 and a second side 12 that are opposite to each other in the first direction. The first side 11 of the bracket 1 is used to heat the appliance to be heated. It can be understood that the bracket 1 has a first side 11 located above and a second side 12 located below. Refer to Figure 2 , that is, the first side and the second side constitute the two sides of the bracket 1 in the first direction.

[0065] The shapes of the respective winding units 2 in "the plurality of winding units 2" can be set to be the same or different. Each winding unit 2 is formed by winding multiple turns of coils. Each turn of the coil in each winding unit 2 can be regarded as an annular structure. Of course, the annular structure is not limited to being circular. It can be square or elliptical. Each winding unit 2 can be laid flat along a surface area, and this surface area can be a plane or a curved surface. Each winding unit 2 can also be bent. Specifically, it can be determined according to the actual situation, and the embodiments of this specification do not limit this.

[0066] When it is said that "the plurality of winding units 2 are distributed along the circumferential direction of the bracket 1", it can be that the plurality of winding units 2 are distributed in a ring shape on the same side of the bracket 1, or it can be that some winding units 2 are arranged on one side of the bracket 1 and another part of the winding units 2 are arranged on the other side of the bracket 1. However, as long as it is annularly distributed on the projection plane of the bracket 1, it can be regarded as "the plurality of winding units 2 are distributed along the circumferential direction of the bracket 1".

[0067] "The direction of the current" refers to the flow direction of the current in the winding unit 2 along the clockwise or counterclockwise direction. When it is said that "the directions of the currents of the two winding units 2 are set to be opposite", it means that when the current direction of one winding unit 2 is clockwise, the current direction of the other winding unit 2 is counterclockwise.

[0068] It should be noted that according to Ampere's rule: Hold the energized solenoid with the right hand and let the four fingers point in the direction of the current. Then the end pointed by the thumb is the N pole of the energized solenoid. Thus, when the current directions of the two winding units 2 are set to be opposite, a closed magnetic field is formed between the two winding units 2. For example, when one of the two winding units 2 is set as the first winding unit and the other is set as the second winding unit, and the first winding unit and the second winding unit are laid flat 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. In this way, 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, thus forming a closed magnetic field.

[0069] Then, when a pair of the winding units 2 is energized, a closed magnetic field formed between two special-shaped magnetic poles formed by the two winding units 2 can interact with the pot wall farther away from the winding unit 2 through magnetic coupling to achieve heating of the pot wall.

[0070] The "width" in "the width of at least part of the first winding loop segment 21 is d1, the width of at least part of the second winding loop segment 22 is d2, and d1 is greater than d2" refers to the distance between one turn of the coil located at the innermost ring of the multi-turn coil of the winding unit 2 and one turn of the coil located at the outermost ring of the ring in the direction outward from the geometric center of the winding unit 2. For details, please refer to Figure 3 and Figure 4 As shown, it can be achieved by reducing the winding length of the corresponding area of the second winding loop segment 22; it can also be that when the adjacent winding line segments in each winding loop segment are arranged in parallel between the first winding loop segment 21 and the second winding loop segment 22, the winding gap of the first winding loop segment 21 is set to be greater than the winding gap of the second winding loop segment 22; of course, when the adjacent winding line segments in each winding loop segment are not arranged in parallel, it will cause uneven winding gaps, but other partial winding line segments can be adjusted adaptively to finally achieve d1 greater than d2.

[0071] "The winding center of the winding unit 2 is located on the side close to the second winding loop segment 22 of its geometric center". The winding unit 2 can be set in shapes such as a quasi-sector or a quasi-triangle, and the geometric center can be adjusted by adjusting the shape of the winding unit 2.

[0072] 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 22 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 1, so as to achieve the largest possible heating range for the pot wall.

[0073] Of course, the specific ways to achieve that the width of the first winding loop segment 21 is set to be greater than the width of the second winding loop segment 22 and to achieve that the winding center of the winding unit 2 is located on the side close to the second winding loop segment 22 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. 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.

[0074] In the statement "the lateral shielding structure extends beyond the plurality of winding units 2 on both sides of the bracket 1 or is flush with the plurality of winding units 2", "on both sides of the bracket 1" refers to the two sides of the bracket 1 in the first direction, that is, the first side located above and the second side located below; "the lateral shielding structure extends beyond the plurality of winding units 2 on both sides of the bracket 1 or is flush with the plurality of winding units 2" means that in the direction of the first side of the bracket 1, the height of the lateral shielding structure is not lower than that of the plurality of winding units 2, and in the direction of the second side of the bracket 1, the height of the lateral shielding structure is still not lower than that of the plurality of winding units 2. In this way, it can better isolate the coil magnetic field from the metal devices outside the coil disc assembly.

[0075] Specifically, the material of the lateral shielding structure can be selected as a soft magnetic material, such as ferrite or nanocrystalline, or a metal with high electrical conductivity, such as aluminum or copper. The material of the lateral shielding structure can also be other materials, which can be specifically determined according to the actual situation, and the embodiments of this specification do not limit this.

[0076] Further, in order to make the magnetic fields generated by the first winding ring section 21 and the second winding ring section 22 uniform and make the cookware heat evenly, in this embodiment, at least part of the winding gap of the first winding ring section 21 is larger than the winding gap of the second winding ring section 22. With such a setting, only the winding gap of the second winding ring section 22 needs to be adjusted and set to be denser, so that the magnetic field generated by the corresponding second winding ring section 22 is greater than the magnetic field generated by the corresponding first winding ring section 21 while being able to be more evenly distributed in the magnetic field range generated by the second winding ring section 22, making the area acting on the pot wall heat evenly.

[0077] Specifically, referring to Figure 5 , a winding structure for winding the winding unit 2 is provided on the bracket 1. The winding structure includes a first winding part 13 and a second winding part 14. The first winding part 13 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 14 and the bracket 1; wherein, the first winding ring section 21 is correspondingly arranged in the plurality of first winding grooves, and the second winding ring section 22 is limited in the second winding groove.

[0078] In this way, on the bracket 1, the first winding ring section 21 can be wound in the first winding grooves in a sparse winding manner, and the second winding ring section 22 can be limited in the second winding groove in a side winding manner.

[0079] Further, in order to enable the lateral shielding structure to better isolate the magnetic field of the coil, the distance between the lateral shielding structure and the corresponding second winding loop segment 22 is d, where 0 < d ≤ 50 mm.

[0080] In this way, there is a gap between the lateral shielding structure and the corresponding second winding loop segment 22, so that the lateral shielding structure can better isolate the magnetic field of the coil. And this gap should not be too large. If the gap is too large, magnetic leakage is likely to occur, and it cannot better isolate the magnetic field of the coil.

[0081] Further, the lateral shielding structure includes a plurality of shielding sheets 3 correspondingly arranged on the periphery of the plurality of winding units 2 and spaced apart from each other.

[0082] In the technical solution of the present invention, a plurality of shielding sheets 3 are arranged at intervals on the periphery of the plurality of winding units 2, and the plurality of shielding sheets 3 are correspondingly arranged with the plurality of winding units 2 to better isolate the magnetic field outside the coil disc assembly. It can be understood that referring to Figure 1 , the distance between the shielding sheet 3 and the corresponding second winding loop segment 22 is d; referring to Figure 4 , the shielding sheet 3 extends beyond the plurality of winding units 2 on both sides of the bracket 1, or is flush with the plurality of winding units 2.

[0083] Specifically, in the circumferential direction of the bracket 1, the central angle corresponding to the shielding sheet 3 is θ1, and the central angle corresponding to the corresponding winding unit 2 is θ2. The ratio of θ1 to θ2 is (1 - 10):(8 - 10).

[0084] It should be noted that "the central angle corresponding to the shielding sheet 3 is θ1" refers to the angle formed by both ends of the shielding sheet 3 and the center of the bracket 1. "The corresponding winding unit 2 corresponding to the central angle θ2" means the winding unit 2 corresponding to the shielding sheet 3. Then, "the corresponding winding unit 2 corresponding to the central angle θ2" refers to the winding unit 2 corresponding to the shielding sheet 3, and the angle formed by the two sides of the outermost circle of this winding unit 2 and the center of the bracket 1. By reasonably controlling the ratio of θ1 to θ2, the magnetic field outside the coil disc assembly can be better isolated.

[0085] Further, 30° ≤ θ1 ≤ 50°, 85° ≤ θ2 ≤ 90°. In this way, by further optimizing the value range of the central angle θ1 corresponding to the shielding sheet 3 and the value range of the central angle θ2 corresponding to the corresponding winding unit 2, the shielding effect of the magnetic field outside the coil disc assembly can be further improved.

[0086] In another embodiment, referring to Figure 6, the lateral shielding structure includes a shielding ring 5 disposed around the periphery of the plurality of winding units 2. The shielding ring 5 is a ring-shaped shielding structure. The shielding ring 5 is sleeved around the periphery of the plurality of winding units 2, which can preferably shield the magnetic field around the coil disc assembly to achieve a better shielding effect.

[0087] Further, the shielding structure further includes a bottom shielding structure disposed on one side of the plurality of winding units 2 in the first direction.

[0088] It should be noted that if the tabletop where the electromagnetic heating device is located is a metal tabletop such as stainless steel, the tabletop is easily heated by the electromagnetic heating device, causing the base of the electromagnetic heating device to melt. Moreover, for some electronic components below the coil disc assembly, if the magnetic field leaking from the bottom is too strong, it will cause damage to the electronic components. In this embodiment, the bottom shielding structure can be disposed below the plurality of winding units 2. By disposing the bottom shielding structure below the plurality of winding units 2, the magnetic field shielding effect at the bottom of the coil disc assembly can be enhanced, and the problem that the base of the electromagnetic heating device melts due to the tabletop being heated by the electromagnetic heating device and the problem that some electronic components below the coil disc assembly are damaged can be improved.

[0089] Specifically, in one embodiment, the bottom shielding structure includes a magnet structure 4, and the magnet structure 4 is disposed on one side of the plurality of winding units 2 in the first direction.

[0090] It should be noted that the material of the magnet structure 4 can be ferrite or nanocrystalline, or other materials, which can be specifically determined according to the actual situation, and the embodiments of this specification do not limit this. The magnet structure 4 with good magnetic conductivity is beneficial to gathering magnetic lines of force, improving the heating power and heating efficiency of the coil disc assembly. At the same time, it can avoid the problem that the base of the electromagnetic heating device melts due to the tabletop being heated by the electromagnetic heating device, and can play a role in isolating the coil magnetic field for the electronic components disposed below the coil disc assembly to ensure the reliability of the electronic components. Specifically, the magnet structure 4 is bonded to the bracket 1 by glue, and the magnet structure 4 is located below the plurality of winding units 2.

[0091] Further, referring to Figure 7 , the bottom shielding structure further includes a shielding seat 6, the shielding seat 6 is disposed on one side of the plurality of winding units 2 in the first direction, and the shielding seat 6 is for mounting one side of the bracket 1.

[0092] In the technical solution of the present utility model, a shielding base 6 is provided below the magnet structure 4 to further improve the magnetic shielding effect below the coil disk assembly. A plurality of mounting holes 61 are provided on the shielding base 6, and a plurality of positioning holes 15 corresponding to the plurality of mounting holes 61 are provided on one side of the bracket 1 facing the shielding base 6. During installation, the positioning holes 15 are aligned with the corresponding mounting holes 61, and screws are screwed into the positioning holes 15 and the mounting holes 61 to fix the bracket 1 on the shielding base 6.

[0093] Specifically, the material of the shielding base 6 can be selected as a soft magnetic material, such as ferrite or nanocrystalline, or a metal with high electrical conductivity, such as aluminum or copper. The material of the shielding base 6 can also be other materials, which can be specifically determined according to the actual situation, and the embodiments of this specification do not limit this.

[0094] Specifically, the shielding base 6 provides a side for the installation of the lateral shielding structure on the side facing the bracket 1. On the side facing the bracket 1, an installation area is provided at the edge of the shielding base 6. The lateral shielding structure is adhesively attached to the corresponding installation area to achieve the installation of the lateral shielding structure. In this embodiment, the lateral shielding structure includes a shielding sheet 3, refer to Figure 8 .

[0095] Furthermore, the plurality of winding units 2 are arranged in series or in parallel.

[0096] When the plurality of winding units 2 are arranged in series, only by adjusting the winding direction, it can be achieved that when powered on, the current directions of the adjacent winding units 2 are set in the opposite direction. In this way, the winding method is simple and convenient for production and processing.

[0097] When the plurality of winding units 2 are arranged in parallel, each winding unit 2 can be controlled independently to be powered on. Not only can the current directions of the adjacent winding units 2 be set in the opposite direction, but in special scenarios, the current directions of each winding unit 2 can be flexibly controlled, which is more flexible and convenient in electronic control. And when some of the winding units 2 fail, the other winding units 2 are not affected and can still work normally.

[0098] Specifically, in this embodiment, two adjacent winding units 2 are riveted, welded or screwed together so that the plurality of winding units 2 can be stably connected and conducted. Of course, other possible connection forms can also be used, which can be specifically determined according to the actual situation, and the embodiments of this specification do not limit this.

[0099] The present utility model further provides an electromagnetic heating device, which includes the coil disc assembly and the electric control device of each of the above embodiments. For the specific structure of the coil disc assembly, please refer to the above embodiments. Since this electromagnetic heating device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated herein one by one.

[0100] The electromagnetic heating device may be an induction cooker, an electromagnetic heating stove top, etc. Any electromagnetic heating device having the coil disc assembly belongs to the electromagnetic heating device described in the present utility model.

[0101] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A coil disc assembly, characterized in that, Comprising: A bracket having two sides in a first direction; A plurality of winding units provided on at least one side of the bracket, the plurality of winding units forming at least one pair of winding units, each pair of winding units including two winding units circumferentially distributed along the bracket, each winding unit being annularly arranged and having 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; And, A shielding structure including a lateral shielding structure provided outside the plurality of winding units, the lateral shielding structure extending beyond the plurality of winding units on both sides of the bracket or being flush with the plurality of winding units; Wherein, 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 of the winding units, at least a partial section of the first winding ring section has a width of d1, at least a partial section of the second winding ring section has a width of d2, and d1 is greater than d2.

2. A coil disc assembly, characterized in that, Comprising: A bracket having two sides in a first direction; A plurality of winding units provided on at least one side of the bracket, the plurality of winding units forming at least one pair of winding units, each pair of winding units including two winding units provided on the bracket and circumferentially distributed along the bracket, each winding unit being annularly arranged and having 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; And, A shielding structure including a lateral shielding structure provided outside the plurality of winding units, the lateral shielding structure extending beyond the plurality of winding units on both sides of the bracket or being flush with the plurality of winding units; Wherein, 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 of the winding units, the winding center of the winding unit is located on one side close to the second winding ring section of its geometric center.

3. The coil disk assembly according to claim 1 or 2, characterized in that, The winding gap of at least a part of the first winding ring section is greater than the winding gap of the second winding ring section.

4. The coil disk assembly according to claim 3, characterized in that, A winding structure for winding the winding unit is provided on the bracket, and the winding structure includes: A first winding portion including a plurality of first winding grooves formed on one side of the bracket; A second winding portion defining a second winding groove with a notch facing the circumferential side of the bracket between the second winding portion and the bracket; and, Wherein, the first winding ring section is correspondingly provided in the plurality of first winding grooves, and the second winding ring section is limited in the second winding groove.

5. The coil disk assembly according to claim 1 or 2, characterized in that The distance between the lateral shielding structure and the corresponding second winding ring section is d, where 0 < d ≤ 50 mm.

6. The coil disk assembly according to claim 1 or 2, characterized in that, The lateral shielding structure includes a plurality of shielding sheets correspondingly provided outside the plurality of winding units and arranged at intervals.

7. The coil disk assembly according to claim 6, wherein, In the circumferential direction of the bracket, the central angle corresponding to the shielding sheet is θ1, and the central angle corresponding to the corresponding winding unit is θ2, and the ratio of θ1 to θ2 is (1 to 10):(8 to 10).

8. The coil disk assembly according to claim 7, wherein, 30° ≤ θ1 ≤ 50°, 85° ≤ θ2 ≤ 90°.

9. The coil disk assembly according to claim 1 or 2, wherein The lateral shielding structure includes a shielding ring disposed around the periphery of the plurality of winding units.

10. The coil disc assembly according to claim 1 or 2, characterized in that, The shielding structure further includes a bottom shielding structure disposed on one side of the plurality of winding units in a first direction.

11. The coil disk assembly according to claim 10, characterized in that, The bottom shielding structure includes: a magnet structure disposed on one side of the plurality of winding units in a first direction; and / or, a shielding base disposed on one side of the plurality of winding units in a first direction, and the shielding base is for mounting one side of the bracket.

12. The coil disk assembly according to claim 11, wherein, One side of the shielding base is for mounting the lateral shielding structure towards the bracket.

13. 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.

14. An electromagnetic heating device, characterized in that, It includes the coil disk assembly according to any one of claims 1 to 13.

Images