Patent Description:
With the development of technology, the use of coil disk has become more and more widespread, such as in induction cookers, rice cookers and other cooking utensils. The coils of the existing coil disks are usually fixed by glue. When the coils are working and heats up, it will cause the glue to produce peculiar smell, which is not conducive to the use of cooking utensil. <CIT> relates generally to a coil disk for induction heating.

The main objective of the present disclosure is to provide a coil disk, which aims to provide a new winding method to avoid the occurrence of peculiar smell during use of the coil disk.

In order to achieve the above objective, the present disclosure provides a coil disk, including:.

In an embodiment, the coil disk includes a plurality of first clamping ribs, and the plurality of first clamping ribs are radially distributed along a circumferential direction of the support structure; and/or
the coil disk includes a plurality of second clamping ribs, and the plurality of second clamping ribs are radially distributed along the circumferential direction of the support structure for first clamping gaps to be distributed along the circumferential direction of the support structure.

In an embodiment, a width of the first clamping rib gradually increases outward from the support structure; and/or
a width of the second clamping rib gradually increases outward from the support structure.

In an embodiment, the first clamping rib and the second clamping rib have straight sections, and a radial cross section of the first clamping gap has a straight section accordingly; and/or.

In an embodiment, a number of layers of coil windings wound in the first clamping gap is <NUM> to <NUM>.

In an embodiment, a height of the first clamping gap is <NUM> to <NUM>.

In an embodiment, the coil disk at least includes an inner ring heating zone and an outer ring heating zone;
the first clamping gap includes an inner clamping gap located in the inner ring heating zone and an outer clamping gap located in the outer ring heating zone, and the inner clamping gap and the outer clamping gap are upwardly inclined and have different inclination angles.

In an embodiment, the outer clamping gap includes a first winding gap and a second winding gap that are arranged along an up-down direction, and an inclination angle of the first winding gap is different from an inclination angle of the second winding gap.

In an embodiment, the support structure includes at least an inner support structure located in the inner ring heating zone and an outer support structure located in the outer ring heating zone;.

In an embodiment, the coil disk includes an inner ring heating zone and an outer ring heating zone; the first clamping gap includes an inner clamping gap located in the inner ring heating zone and an outer clamping gap located in the outer ring heating zone;.

In an embodiment, the first coil winding and the second coil winding are independent of each other; or.

In an embodiment, the third coil winding and the fourth coil winding are independent of each other; or.

In an embodiment, the coil disk includes a control circuit board, a first switching circuit is provided on the control circuit board, and the first switching circuit is respectively connected with the first coil winding and the second coil winding to switch a connection relationship between the first coil winding and the second coil winding; and/or
a second switching circuit is provided on the control circuit board, and the second switching circuit is respectively connected with the third coil winding and the fourth coil winding to switch a connection relationship between the third coil winding and the fourth coil winding.

In an embodiment, the coil disk further includes a first inductor L1 and a first resistor R1 configured with the first coil winding, a second inductor L2 and a second resistor R2 configured with the second coil winding, a third inductor L3 and a third resistor R3 configured with the third coil winding, and a fourth inductor L4 and a fourth resistor R4 configured with the fourth coil winding;.

In an embodiment, a height h1 of a coil winding located in the inner clamping gap is equivalent to a height h2 of a coil winding located in the outer clamping gap.

In an embodiment, the first clamping gap includes an inner arc section, and the inner arc section is curved and extended downward from the support structure.

In an example, the first clamping gap further includes a transition section and an outer arc section; the inner arc section forming a concave arc downward from the support structure, the outer arc section forming a concave arc upward from the transition section, and the inner arc section and the outer arc section being transitionally connected through the transition section.

In an example, the first clamping rib is provided with a first heat dissipation opening; and/or the second clamping rib is provided with a second heat dissipation opening.

In an example, a first gap is provided between two adjacent first clamping ribs, and the second clamping rib is located between the two adjacent first clamping ribs in correspondence with the first gap.

In an example, the coil disk further includes a coil support located below the second clamping rib, and the second clamping rib, the coil support and the support structure are enclosed to form a second clamping gap;.

In an example, the opening is provided along a radial direction of the coil disk, after passing through the opening each time, the enameled wire enters from the first clamping gap to the second clamping gap, or enters from the second gap to the first clamping gap, such that coils in the first clamping gap and the second clamping gap are wound sequentially and alternately.

In technical solutions of the present disclosure, a first clamping gap is formed between the first clamping rib and the second clamping rib, and the enameled wire is wound in the winding gap, such that the coil is clamped by the first clamping rib and the second clamping rib, so as to realize the fixation of the coil. Compared with the existing fixing method, the fixing of the coil does not require the use of glue, so that no peculiar smell will be generated when the coil is heated, which is beneficial to the user's use. In addition, the efficiency of winding and fixing the coil in this way is greatly increased, and the stability of the coil after winding is greatly increased. It is worth noting that, since the first and second clamping ribs both have free ends, the movement of the first and second clamping ribs is more flexible. When the coil is wound into the first clamping gap, it is beneficial to the entry and clamping of the coil, especially when the multi-layer coil is provided, it is beneficial to the arrangement of the coil in the first clamping gap.

In order to more clearly illustrate the embodiments of the present disclosure, drawings used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. It will be apparent to those skilled in the art that other figures can be obtained according to the structures shown in the drawings without creative work.

The following table is the description of reference signs of <FIG> in the specification (the description of reference signs of other figures can refer to the content of the corresponding part in the specific embodiment):.

The realization of the objective, functional characteristics, and advantages of the present disclosure are further described with reference to the accompanying drawings.

The technical solutions of the embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It is obvious that the embodiments to be described are only some rather than all of the embodiments of the present disclosure. All other embodiments obtained by persons skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the scope of the present disclosure.

It should be noted that if there is a directional indication (such as up, down, left, right, front, rear. ) in the embodiments of the present disclosure, the directional indication is only used to explain the relative positional relationship, movement, etc. of the components in a certain posture (as shown in the drawings). If the specific posture changes, the directional indication will change accordingly.

It should be noted that, the descriptions associated with, e.g., "first" and "second," in the present disclosure are merely for descriptive purposes, and cannot be understood as indicating or suggesting relative importance or impliedly indicating the number of the indicated technical feature. Therefore, the feature associated with "first" or "second" can expressly or impliedly include at least one such feature. Besides, the meaning of "and/or" appearing in the disclosure includes three parallel scenarios. For example, "A and/or B" includes only A, or only B, or both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the realization of those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist, nor is it within the scope of the present disclosure.

The present disclosure mainly provides a coil disk, which is mainly used in cooking utensil to increase the stability and reliability when installing the coil, and avoid using glue during the fixing process of the coil and avoid generating peculiar smell during the use of the coil disk. Meanwhile, the clamping rib has different shapes, such that the coil disk can be applied to different working platforms to heat different cookware. By improving the structure in the clamping gap, the arrangement shape, size, relative position relationship, etc. of the coil windings <NUM> located in the clamping gap can be changed as desired, so that the heating of the coil disk is more uniform.

The specific structure of the coil disk will be mainly described below.

As shown in <FIG>, in the embodiment of the present disclosure, the coil disk includes:.

The support structure <NUM> can have many shapes, taking a columnar shape as an example. The cross section of the support structure <NUM> may be triangular, circular, elliptical, square, etc., taking a circular shape as an example. The support structure is located in the middle of the coil disk. It can be understood that the support structure is provided in the middle area of the entire coil disk, and is not limited by the specific shape and composition of the coil disk (either a whole coil disk or a coil disk composed of multiple sub-coil disks). The first clamping rib <NUM> and the second clamping rib <NUM> are provided on a side wall of the support structure <NUM>. According to the invention, the first clamping rib <NUM> and the second clamping rib <NUM> are integrally formed with the support structure <NUM>.

The shape and structure of the first clamping rib <NUM> can be the same as or different from the shape and structure of the second clamping rib <NUM>, as long as the first clamping gap <NUM> can be formed between the first clamping rib <NUM> and the second clamping rib <NUM>. The following takes the introduction of the first clamping rib <NUM> as an example. The second clamping rib <NUM> is matched with the first clamping rib <NUM> to form the required first clamping gap <NUM>.

The first clamping rib <NUM> can have many shapes, and different shapes can be set according to different shapes of pots, so that the coil winding <NUM> in the first clamping gap <NUM> is adapted to the shape of the pot. The shape of the first clamping rib <NUM> can also be set according to the requirements of different working conditions. In this embodiment, the elongated shape is taken as an example. One end of the first clamping rib <NUM> is fixedly connected to the support structure <NUM>, another end of the first clamping rib <NUM> can extend in a direction away from the support structure <NUM>, and can extend in a direction perpendicular to the length of the support structure <NUM>, or extend obliquely upward or obliquely downward. The specific extension method is determined according to specific working conditions or actual needs. The first clamping rib <NUM> and the second clamping rib <NUM> are made of insulating hard material and hard plastic.

In order to improve the winding effect, the coil disk includes a plurality of first clamping ribs <NUM>, and the plurality of first clamping ribs <NUM> are radially distributed along a circumferential direction of the support structure <NUM>; and/or the coil disk includes a plurality of second clamping ribs <NUM>, and the plurality of second clamping ribs <NUM> are radially distributed along the circumferential direction of the support structure <NUM>, such that the clamping gaps are distributed along the circumferential direction of the support structure <NUM>. That is, one end of each of the plurality of first clamping ribs <NUM> is connected to the support structure <NUM>, and the other end of each of the plurality of first clamping ribs <NUM> is centered on the support structure <NUM> and radially distributed. Similarly, one end of the plurality of second clamping ribs <NUM> is connected to the support structure <NUM>, and the other end of the second clamping ribs <NUM> is centered on the support structure <NUM> and radially distributed. In this way, the first clamping gap <NUM> is along the circumference of the support structure <NUM>, so that when the enameled wire is wound into the first clamping gap <NUM>, it can be clamped in multiple positions, thereby improving the stability of the enameled wire being clamped.

As for the relative position relationship of the first clamping rib <NUM> and the second clamping rib <NUM>, the second clamping rib <NUM> is located below the first clamping rib <NUM>, which can include multiple situations, and different situations can be set according to different needs. In the first situation, the second clamping rib <NUM> is located directly below the first clamping rib <NUM>, and the cross section of the first clamping gap <NUM> is in an inverted U shape. In the second situation, a part of the second clamping rib <NUM> is located directly below the first clamping rib <NUM>, and a part is located directly below the gap between two adjacent first clamping ribs <NUM>. In the third situation, the second clamping rib <NUM> is completely located directly below the gap between two adjacent first clamping ribs <NUM>, and the projections of the first clamping rib <NUM> and the second clamping rib <NUM> in the horizontal plane do not intersect. The following takes the third case as an example for specific explanation:.

There is a first gap <NUM> between two adjacent first clamping ribs <NUM>. There is a second gap <NUM> between adjacent second clamping ribs <NUM>. The second clamping rib <NUM> is located between two adjacent first clamping ribs <NUM> corresponding to the first gap <NUM>. The first clamping rib <NUM> is located between two adjacent second clamping ribs <NUM> corresponding to the second gap <NUM>. When the first clamping rib <NUM>, the second clamping rib <NUM> and the support structure <NUM> are integrally injection-molded, it is favorable for demolding. The two sides of the coil winding <NUM> are supported at intervals (the first clamping rib <NUM> and the second clamping rib <NUM> are alternately supported), so that the coil winding <NUM> is clamped more stably.

The number of layers of enameled wire in the first clamping gap <NUM> can be set according to requirements. Specifically, the number of layers of the coil winding <NUM> wound in the clamping gap is <NUM> to <NUM> layers. Too few layers are not conducive to improving the working efficiency of the coil disk, and too many layers are not conducive to the stability of the winding of the coil winding <NUM>. Regarding the distance between the first clamping rib <NUM> and the second clamping rib <NUM>, that is, the height H of the clamping gap is <NUM> to <NUM>. If the clamping gap is too small, it is not conducive to the entry and winding of the enameled wire, and if the gap is too large, it is not conducive to the stability of the enameled wire after winding.

In this embodiment, a first clamping gap <NUM> is formed between the first clamping rib <NUM> and the second clamping rib <NUM>, and the enameled wire is wound in the winding gap, such that the coil is clamped by the first clamping rib <NUM> and the second clamping rib <NUM>, so as to realize the fixation of the coil. Compared with the existing fixing method, the fixing of the coil does not require the use of glue, so that no peculiar smell will be generated when the coil is heated, which is beneficial to the user's use. Besides, the efficiency of winding and fixing the coil in this way is greatly increased, and the stability of the coil after winding is greatly increased. It is worth noting that since the first clamping rib <NUM> and the second clamping rib <NUM> both have free ends, the movement of the first clamping rib <NUM> and the second clamping rib <NUM> is more flexible. When the coil is wound into the first clamping gap, it is beneficial to the entry and clamping of the coil, especially when the multi-layer coil is provided, it is beneficial to the arrangement of the coil in the first clamping gap.

It is worth noting that, in some embodiments, the plurality of second clamping ribs <NUM> are connected to the support structure <NUM> and combined to form a coil support <NUM> for installation of the coil winding <NUM>. In some embodiments, in order to improve the stability of the coil support <NUM>, the adjacent second clamping ribs <NUM> are connected to each other, and there may be many connection positions, and the connection position being the ends away from the support structure <NUM> is taken as an example.

In some embodiments, in order to improve the stability of the enameled wire being clamped, a width of the first clamping rib <NUM> gradually increases outward from the support structure <NUM>; and/or a width of the second clamping rib <NUM> gradually increases outward from the support structure <NUM>. In this embodiment, the width of the first clamping rib <NUM> may be increased, or the width of the second clamping rib <NUM> may be increased. It is also possible that the widths of the first clamping rib <NUM> and the second clamping rib <NUM> are increased at the same time. The first clamping rib <NUM> and the second clamping rib <NUM> are in a sheet shape. As the distance between the first clamping rib <NUM> and the second clamping rib <NUM> is farther from the support structure <NUM>, the width of the first clamping rib <NUM> and the second clamping rib <NUM> becomes larger. In this way, the area where the first clamping rib <NUM> and the second clamping rib <NUM> clamp the coil winding <NUM> gradually increases as the diameter of the coil winding <NUM> increases. As such, it is beneficial to increase the stability of the first clamping gap <NUM> to clamp the coil winding <NUM>.

In order to improve the working stability of the coil disk, and reduce the temperature of the coil disk when it is working, the first clamping rib <NUM> is provided with a first heat dissipation opening; and/or, the second clamping rib <NUM> is provided with a second heat dissipation opening. The first heat dissipation opening is opened along a length direction of the first clamping rib <NUM>, and the second heat dissipation opening is opened along a length direction of the second clamping rib <NUM>. There can be many shapes of the first heat dissipation opening and the second heat dissipation opening, such as a long strip, a circular shape, a polygonal shape, and the like. The first heat dissipation opening and the second heat dissipation opening enable the heat to be dissipated in time when the coil disk is working, so as to prevent the coil disk from being too high in temperature and affecting the operation of the coil disk.

In some embodiments, in order to improve the compactness of the structure, a side of the second clamping rib <NUM> away from the first clamping rib <NUM> is provided with a mounting groove for the magnetic strip <NUM> to be installed. It is worth noting that the groove width and/or groove depth of the mounting groove gradually increase along the extension direction of the first clamping gap <NUM> (from the support structure <NUM>). In this way, the mounting groove can be installed with the magnetic strip <NUM> gradually wider or thicker, so as to generate a stronger magnetic field in the peripheral part of the coil disk. In this way, the magnetic strip <NUM> can be conveniently installed on the coil disk and adapted to the winding of the coil (by gradually increasing the width of the magnetic strip <NUM> to reduce the tendency of the gap between two adjacent magnetic strip <NUM> to increase as the diameter of the coil disk increases), so that the heating of the coil disk is more uniform.

The first clamping gap <NUM> can have different shapes to meet different requirements. Give a few examples to illustrate, the first clamping rib <NUM> and the second clamping rib <NUM> have straight sections, and a radial cross section of the first clamping gap <NUM> has a straight section; and/or the first clamping rib <NUM> and the second clamping rib <NUM> have stepped sections, and a radial cross section of the first clamping gap <NUM> has a stepped section; and/or the first clamping rib <NUM> and the second clamping rib <NUM> have arc-shaped curved sections, and a radial cross section of the first clamping gap <NUM> has an arc curved section.

In this embodiment, the first clamping gap <NUM> can be all straight sections or partly straight sections; can be all stepped sections or partly stepped sections; can be all arc-shaped curved sections or partly arc-shaped curved sections. When the first clamping rib <NUM> and the second clamping rib <NUM> are both straight clamping ribs, the first clamping gap <NUM> is a straight clamping gap. When the coil is wound into the first clamping gap <NUM>, the coil is in a straight circle (the number of coil layers is the same).

When the first clamping rib <NUM> and/or the second clamping rib <NUM> is a stepped plate, the first clamping gap <NUM> is a stepped gap, and the number of layers of the coil is different. There can be many positions where there are many layers of coils, including the inside, middle and outside of the ring. Taking the multi-layer arrangement on the outside as an example, this arrangement makes the coils on the outside of the coil disk more. It can compensate for the weaker average magnetic field outside the coil disk (as the diameter of the coil disk increases, the gap between adjacent magnetic strips <NUM> also gradually increases. As a result, the magnetic field strength gradually weakens in the area where the coils between the magnetic strips <NUM> are located) and the heating efficiency is not high, so that the inner and outer sides of the coil disk are heated evenly during the working process.

There may be many forms of the first clamping rib <NUM> and the second clamping rib <NUM> that make the first clamping gap <NUM> curved in an arc shape. The first clamping rib <NUM> is in an arc shape (the coils are arranged along the length direction of the first clamping rib <NUM>). The second clamping rib <NUM> is in an arc shape (the coils are arranged along the length direction of the second clamping rib <NUM>). Both the first clamping rib <NUM> and the second clamping rib <NUM> are in an arc shape (the coils are arranged along the length direction of the first clamping rib <NUM> or the second clamping rib <NUM>). Taking the first clamping rib <NUM> and the second clamping rib <NUM> as an example, the curves of the first clamping rib <NUM> and the second clamping rib <NUM> are equivalent, so that the bending and extending direction of the first clamping gap <NUM> is the same as the extending direction of the first clamping rib <NUM> and the second clamping rib <NUM>. The first clamping gap <NUM> is uniformly arranged (that is, the width of the entire first clamping gap <NUM> is equivalent), which facilitates the uniform clamping of the enameled wire, and thus facilitates the uniform operation of the coil disk.

In some embodiments, as shown in <FIG>, in order to further improve the efficiency and uniformity of heating the coil disk, the first clamping gap <NUM> includes an inner arc section <NUM> which is bent and extended from the support structure <NUM> downward. The inner arc section <NUM> can have many forms, such as a concave arc, or a convex arc, or both concave and convex arcs. The first clamping gap <NUM> includes an inner arc section <NUM>, and the density of the enameled wire (the number of turns of the enameled wire per unit radial dimension) of the inner arc section <NUM> is increased, which is beneficial to increase the efficiency of the middle of the coil disk. Normally, the magnetic field strength in the middle of the coil plate disk is stronger. More coils is beneficial to making full use of the strong magnetic field strength, thereby improving the working efficiency of the coil disk. The inner arc section <NUM> is set as a concave arc as an example, so that the enameled wire density (the number of enameled wires per unit radial dimension) of the inner arc section <NUM> is gradually reduced along the radial direction of the coil disk. That is, the coil density near the support structure <NUM> in the inner arc section <NUM> is relatively strong, and this arrangement is adapted to the tendency of the magnetic field strength to gradually weaken from the middle to the periphery, so as to further make full and reasonable use of the magnetic field strength. When the outer side of the coil disk is provided with multi-layer coils or the magnetic field intensity is greater than the inner side, the heating efficiency of the inner side of the coil disk (inner arc section <NUM>) is increased, which is beneficial to improve the heating uniformity of the entire coil disk.

In order to further improve the working efficiency of the coil disk, by setting the shape of the first clamping gap <NUM>, the coil winding <NUM> wound in the first clamping gap <NUM> has the function of magnetization, so as to make full use of the magnetic field to improve the working efficiency of the coil disk. Specifically, the first clamping gap <NUM> further includes a transition section <NUM> and an outer arc section <NUM>. The inner arc section <NUM> forms a concave arc downward from the support structure <NUM>. The outer arc section <NUM> forms a concave arc upward from the transition section <NUM>. The inner arc section <NUM> and the outer arc section <NUM> are transitionally connected by a circular arc of the transition section <NUM>. The transition section <NUM> may be a straight section or a concave arc section. Through the arrangement of the inner arc section <NUM>, the outer arc section <NUM>, and the transition section <NUM>, the first clamping gap <NUM> is first gradually reduced and then gradually increased during the process of extending from the support structure <NUM> (the middle part of the coil disk) to the surroundings. It also makes the coil density in the winding and the first clamping gap <NUM> gradually decrease first, and then gradually increase. When the magnetic field passes through the coil winding <NUM> in this way, the magnetic field passing through the coil is fully utilized, thereby effectively improving the working efficiency and uniformity of the coil disk.

In some embodiments, as shown in <FIG>, in order to further improve the working uniformity of the coil disk, the coil disk further includes a coil support <NUM> located below the second clamping rib <NUM>, and the second clamping rib <NUM>, the coil support <NUM> and the support structure <NUM> are enclosed to form a second clamping gap <NUM>; the first clamping gap is in communication with the second clamping gap <NUM> through an opening <NUM>; and during winding process of the enameled wire of the coil disk, when passing through the opening <NUM>, the enameled wire enters from the clamping gap to the second clamping gap <NUM>, or enters from the second gap <NUM> to the clamping gap, such that the enameled wire is alternately wound between the clamping gap and the second clamping gap <NUM> through the opening <NUM>.

Specially, in this embodiment, the second clamping rib <NUM> is located below the gap between two adjacent first clamping ribs <NUM>, that is, the first clamping rib <NUM> and the second clamping rib <NUM> partially overlap or do not overlap in the up-down direction. There is a gap between the second clamping rib <NUM> and the coil support <NUM>. Since the second clamping ribs <NUM> are distributed at intervals along the circumferential direction of the support structure <NUM>, the first clamping gap <NUM> communicates with the second clamping gap <NUM> through a gap between two adjacent second clamping ribs <NUM>, that is, the number of openings <NUM> can be multiple. During the winding process of the coil winding <NUM>, the clamping gap can be switched at each opening <NUM> (switched between the first clamping gap <NUM> and the second clamping gap <NUM>), or the clamping gap can be switched only at the same opening <NUM>. The coil winding <NUM> can switch the clamping gap every time it is wound, the coil winding <NUM> can also be switched to another clamping gap after winding multiple turns, and switched back to the original clamping gap after winding multiple turns in another clamping gap to continue winding.

Taking the switching of the clamping gap every time the same opening <NUM> is passed as an example, the opening <NUM> is along the radial direction of the coil disk. Each time passing through the opening <NUM>, the enameled wire enters from the first clamping gap <NUM> to the second clamping gap <NUM>, or from the second gap <NUM> to the first clamping gap <NUM>. In this way, the coils in the first clamping gap <NUM> and the second clamping gap <NUM> are wound sequentially and alternately. Taking winding in the first clamping gap <NUM> as an example, when passing through the opening <NUM>, the coil enters the second clamping gap <NUM> from the first clamping gap <NUM>, and after winding it once in the second clamping gap <NUM>, returns to the first clamping gap <NUM> through the same opening <NUM> to continue winding, and thus alternately reciprocates. By winding the coil winding <NUM> in this way, the coils in the first clamping gap <NUM> and the second clamping gap <NUM> are evenly wound, thereby greatly improving the uniformity of the coil disk during operation, and avoiding that after winding a clamping gap (taking the first clamping gap <NUM> as an example), a transition section <NUM> must be set to enter another gap (taking the second clamping gap <NUM> as an example) to continue winding. Thus, the existence of the transition section <NUM> is completely avoided, so that the winding of the double-layer coil is more compact and regular, and the work uniformity is better.

In some embodiments, in order to further improve the working efficiency and uniformity of the coil disk, the coil disk includes an inner ring heating zone and an outer ring heating zone. The first clamping gap <NUM> includes an inner clamping gap <NUM> located in the inner ring heating zone and an outer clamping gap <NUM> located in the outer ring heating zone, and the inner clamping gap <NUM> and the outer clamping gap <NUM> are upwardly inclined and have different inclination angles. It is worth noting that in this embodiment, only two heating zones are used as an example for description. In other embodiments, it may include three, four or even more heating zones. The positional relationship between the multiple heating zones can be reasonably deduced with reference to the inner ring heating zone and the outer ring heating zone in this embodiment. It should be understood that the technical solution for multiple heating zones is based on the two heating zones in this embodiment and should fall within the protection scope of the present disclosure.

In this embodiment, the coil disk includes at least two heating zones. One is the inner ring heating zone located in the center of the coil disk. The inner ring heating zone can be circular or toroidal. The other is the outer ring heating zone around the inner ring heating zone, and the outer ring heating zone is toroidal. The inner ring heating zone and the outer ring heating zone are respectively heated by different coil windings <NUM>, so that an inner clamping gap <NUM> and an outer clamping gap <NUM> are respectively provided.

It is worth noting that the starting point for the upward tilting of the inner clamping gap <NUM> and the outer clamping gap <NUM> is the support structure <NUM>, that is, the support structure <NUM> is inclined upward away from the support structure <NUM>. There are many ways of tilting, which can be a straight line tilting or an arc tilting. Taking the concave arc tilting as an example, the inclination angle of the inner ring gap is different from the inclination angle of the outer ring gap (the slope is different when inclined in a straight line, and the curvature is different when inclined in an arc). The distance between the coil of the coil disk and the heated pot is diversified, so that the heating of the coil disk has higher adaptability (can be adapted to a variety of different working conditions) and better uniformity.

In some embodiments, in order to further improve the adaptability and uniformity of the coil disk, the outer clamping gap <NUM> includes a first winding gap <NUM> and a second winding gap <NUM> up and down, and the inclination angles of the first winding gap <NUM> and the second winding gap <NUM> are different. In this embodiment, the first winding gap <NUM> and the second winding gap <NUM> in the outer ring heating zone are stacked. Moreover, the inclination angles of the two are different, which further enriches the distance between the coil winding <NUM> and the pot, and improves the adaptability and uniformity.

Regarding the difference of the inclination angle, when the inclination way is arc-shaped, the curvature of the arc-shaped inclination is different. As shown in FIG <NUM> to FIG <NUM>, the extension lines of the straight lines where the inner clamping gap <NUM>, the first winding gap <NUM>, and the second winding gap <NUM> locate are shown, the curvatures R1, R2, and R3 of each extension line are different.

It is worth noting that during the use of the coil disk, the coil windings <NUM> in the first winding gap <NUM> and the second winding gap <NUM> can be connected in series or in parallel, or can work independently of each other. The coil winding <NUM> in the first winding gap <NUM> and the coil winding <NUM> in the second winding gap <NUM> can be selectively used according to specific working conditions. The coil windings <NUM> in the first winding gap <NUM> and the second winding gap <NUM> are connected in series or parallel and used at the same time.

The following provides a specific structural solution for realizing the above embodiment.

The support structure <NUM> includes an inner support structure <NUM> located in the inner ring heating zone and an outer support structure <NUM> located in the outer ring heating zone;.

It is worth noting that in other embodiments, the number of support structures can be adjusted according to the partitioning of the heating zones. In this embodiment, only the basic inner and outer support structures are used for description. It should be understood that the technical solutions of multiple support structures are based on the inner and outer support structures in this embodiment, and should fall within the protection scope of the present disclosure.

The inner support structure <NUM> is cylindrically provided in the center of the coil disk, the outer support structure <NUM> is around the outer side of the inner support structure <NUM>, and there is a gap between the inner support structure <NUM> and the outer support structure <NUM>. The first inner clamping rib <NUM> and the second inner clamping rib <NUM> extend from the inner support structure <NUM> to the outer support structure <NUM>. The first inner clamping rib <NUM> is located above the second inner clamping rib <NUM> (there are many forms on the top, including straight, completely staggered, and partially staggered situations. For details, please refer to the above embodiment). The first inner clamping rib <NUM> and the second inner clamping rib <NUM> may be in a linear shape, or may be in a long arc shape, so that the first inner clamping gap <NUM> can be inclined upward.

Similarly, the first outer clamping rib <NUM> and the second outer clamping rib <NUM> extend from the outer support structure <NUM> to the inner support structure <NUM>. The first outer clamping rib <NUM> is located above the second outer clamping rib <NUM> (there are many forms on the top, including straight, completely staggered, and partially staggered situations. For details, please refer to the above embodiment). The first outer clamping rib <NUM> and the second outer clamping rib <NUM> may be in a linear shape, or may be in a long arc shape, so that the first outer clamping gap <NUM> can be inclined upward. The outer support structure <NUM> has a circular ring shape. The plurality of first outer clamping ribs <NUM> and the second outer clamping ribs <NUM> are arranged along the circumference of the outer support structure <NUM>.

In some embodiments, as shown in <FIG>, in order to further improve the adaptability of the coil disk and increase the energy utilization rate of the coil disk, the coil disk includes an inner ring heating zone and an outer ring heating zone; the clamping gap includes an inner clamping gap <NUM> located in the inner ring heating zone and an outer clamping gap <NUM> located in the outer ring heating zone; the outer clamping gap <NUM> includes a first winding gap <NUM> and a second winding gap <NUM> that are arranged along the up-down direction, and/or the inner clamping gap <NUM> includes a third winding gap <NUM> and a fourth winding gap <NUM> that are arranged along the up-down direction; the first winding gap <NUM> and the second winding gap <NUM> are respectively provided with a first coil winding <NUM> and a second coil winding <NUM>; and/or the third winding gap <NUM> and the fourth winding gap <NUM> are respectively provided with a third coil winding <NUM> and a fourth coil winding <NUM>.

In this embodiment, the inner ring heating zone of the coil disk can be a single layer or multiple layers. Taking two layers as an example, a third winding gap <NUM> and a fourth winding gap <NUM> are respectively provided. A third coil winding <NUM> is wound in the third winding gap <NUM>, and a fourth coil winding <NUM> is wound in the fourth winding gap <NUM>. Similarly, the outer ring heating zone of the coil disk can be a single layer or multi layers. Taking two layers as an example, a first winding gap <NUM> and a second winding gap <NUM> are respectively provided. A first coil winding <NUM> is wound in the first winding gap <NUM>, and a second coil winding <NUM> is wound in the second winding gap <NUM>.

Regarding the relationship between the coil winding <NUM>:
The first coil winding <NUM> and the second coil winding <NUM> are independent of each other. Alternatively, the first coil winding <NUM> and the second coil winding <NUM> are connected in series. Alternatively, the first coil winding <NUM> and the second coil winding <NUM> are connected in parallel. The third coil winding <NUM> and the fourth coil winding <NUM> are independent of each other. Alternatively, the third coil winding <NUM> and the fourth coil winding <NUM> are connected in series. Alternatively, the third coil winding <NUM> and the fourth coil winding <NUM> are connected in parallel. In some embodiments, according to special needs, the first coil winding <NUM> and the third coil winding <NUM> (or the fourth coil winding <NUM>) can be connected in series or in parallel, the second coil winding <NUM> and the third coil winding <NUM> (or the fourth coil winding <NUM>) can also be connected in series or in parallel.

Since the coil windings <NUM> of different layers have different distances between the heated pots, the coils at different positions are adapted to different heating requirements of the pots. Specifically, in order to meet the requirements of different working conditions, the inner ring heating zone and the outer ring heating zone can be optionally used, and the inner ring heating zone and the outer ring heating zone can be used at the same time. The following is a specific description from the perspective of the heating position and the large and small power of the coil disk.

When only the middle part needs to be heated, the third coil winding <NUM> and the fourth coil winding <NUM> are selected, or the third coil winding <NUM> and the fourth coil winding <NUM> are used in series or in parallel. The power is larger when only the third coil winding <NUM> is used, and the power is smaller when only the fourth coil winding <NUM> is used. The power when the third coil winding <NUM> and the fourth coil winding <NUM> are used in parallel is greater than the power when the third coil winding <NUM> is used alone.

When only the periphery needs to be heated, the first coil winding <NUM> and the second coil winding <NUM> are selected, or the first coil winding <NUM> and the second coil winding <NUM> are used in series or in parallel. The power is larger when only the first coil winding <NUM> is used, and the power is smaller when only the second coil winding <NUM> is used. The power when the first coil winding <NUM> and the second coil winding <NUM> are used in parallel is greater than the power when the first coil winding <NUM> is used alone.

When heating is needed in the middle and the periphery, a set of coil winding <NUM> is selected for the inner ring heating zone and the outer ring heating zone to work together. For example, the third coil winding <NUM> is selected, and the first coil winding <NUM> and the second coil winding <NUM> are used in parallel.

In order to improve the intelligent and convenient control of the coil winding <NUM>, the coil disk includes a control circuit board, a first switching circuit is provided on the control circuit board, and the first switching circuit is respectively connected with the first coil winding <NUM> and the second coil winding <NUM> to switch a connection relationship between the first coil winding <NUM> and the second coil winding <NUM>; and/or a second switching circuit is provided on the control circuit board, and the second switching circuit is respectively connected with the third coil winding <NUM> and the fourth coil winding <NUM> to switch a connection relationship between the third coil winding <NUM> and the fourth coil winding <NUM>. In this embodiment, by setting the first switching circuit, the first coil winding <NUM> can be controlled to work, or the second coil winding <NUM> can be controlled to work, or the first coil winding <NUM> and the second coil winding <NUM> work in series or in parallel according to requirements. Similarly, by setting the second switching circuit, the third coil winding <NUM> can be controlled to work, or the fourth coil winding <NUM> can be controlled to work, or the third coil winding <NUM> and the fourth coil winding <NUM> work in series or in parallel according to requirements. In some embodiment, the first switching circuit and the second switching circuit are controlled by the main control circuit on the control circuit board. The main control circuit can coordinate the work of the first switching circuit and the second switching circuit according to instructions or requirements, so that the coil disk works as required.

In some embodiments, in order to further improve the energy utilization rate of the coil disk and prolong the service life of the Insulated Gate Bipolar Transistor (IGBT) on the control circuit board, the coil disk further includes:.

In this embodiment, the first coil winding <NUM> is located above the second coil winding <NUM>, the third coil winding <NUM> is located above the fourth coil winding <NUM>, such that the first coil winding <NUM> and the third coil winding <NUM> are suitable for higher power operation, and the second coil winding <NUM> and the fourth coil winding <NUM> are suitable for lower power operation. It is necessary to configure the first coil winding <NUM> with a smaller first inductance L1 and a larger first resistance R1, and configure the second coil winding <NUM> with a smaller second inductance L2 and a smaller second resistance R2. That is L1<L2, R1>R2. In the same way, it is necessary to configure the third coil winding <NUM> with a smaller third inductance L1 and a larger third resistance R1, and configure the fourth coil winding <NUM> with a smaller fourth inductance L4 and a smaller fourth resistance R4. That is, L3<L4, R3>R4. As such, different coil windings <NUM> can be selected according to different work requirements, and different coil windings <NUM> are configured with inductances and resistances adapted to them, so that the corresponding coil windings <NUM> can be adapted to work requirements. In this way, while making full and reasonable use of electric energy, it also prevents the IGBT on the control circuit board from generating a higher temperature, so as to increase the operating temperature of the IGBT and help to extend the service life of the IGBT. The way to configure the inductance can be achieved by setting the number of turns of the coil winding <NUM>, the more the number of coil turns, the greater the inductance, and the less the number of coil turns, the smaller the inductance. Therefore, the number of turns of the first coil winding <NUM> may be set to be less than the number of turns of the second coil winding <NUM>, and the number of turns of the third coil winding <NUM> may be set to be less than the number of turns of the fourth coil winding <NUM>.

In order to further achieve the coordinated work of the coil winding <NUM> of the inner ring heating zone and the outer ring heating zone, the inductance and resistance can be further limited, L1<L4, R1>R4; L3<L2, R3>R2. The first coil winding <NUM> (outer ring heating zone) can be matched with the fourth coil winding <NUM> (inner ring heating zone). The third coil winding <NUM> (inner ring heating zone) can be matched with the second coil winding <NUM> (outer ring heating zone). In this way, the coil winding <NUM> on the coil can be configured and used arbitrarily, which can meet the requirements of full energy saving of the coil and extension of the service life of the IGBT.

It is worth noting that the above description only uses two sets of coil windings <NUM> in the inner ring heating zone and the outer ring heating zone to describe the distance. It is understandable that the above solution can be expanded to provide multiple sets of coil windings <NUM> in each heating zone, or it can be expanded to provide more heating zones. Anything that belongs to the above promotion belongs to the inventive concept of the present disclosure.

In some embodiments, as shown in <FIG>, in order to make the coil disk suitable for the existing work platform, the coil winding <NUM> of different situations is set without increasing the total height of the coil disk, the height h1 of the coil winding <NUM> located in the inner clamping gap <NUM> is equivalent to the height h2 of the coil winding <NUM> located in the outer clamping gap <NUM>. When two layers of coil windings <NUM> are provided in the outer ring heating zone, the height of the two layers of coil windings <NUM> (overlapped up and down) is equivalent to the height of the coil winding <NUM> of the single-layer inner ring heating zone. Conversely, when two layers of coil windings <NUM> are provided in the inner ring heating zone, the height of the two layers of coil windings <NUM> (overlapped up and down) is equivalent to the height of the coil winding <NUM> of the single-layer outer ring heating zone. Since the coil winding <NUM> is arranged obliquely, the height of a single layer can be equal to that of a double layer by adjusting the inclination angle of the coil winding <NUM>. In this embodiment, the height h1 of the coil winding <NUM> in the inner clamping gap <NUM> is equivalent to the height h2 of the coil winding <NUM> in the outer clamping gap <NUM>, such that the coil disk makes full and reasonable use of the space, avoiding the additional height of the coil disk, so that the coil disk can be applied to the existing work platform, and the manufacturing cost of cooking utensils is greatly reduced.

As shown in <FIG>, the present disclosure further provides a cooking utensil. The cooking utensil includes a base <NUM> and a coil disk. The specific structure of the coil disk refers to the above-mentioned embodiment. Since this cooking utensil adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The coil disk is installed on the base <NUM>.

As shown in <FIG>, in some embodiments of the present disclosure, the coil disk further includes:.

In this embodiment, the overall shape of the coil support <NUM> can be many, such as triangle, quadrilateral and other polygons, ellipse, circle, etc., in this embodiment, a circular configuration is taken as an example. The inner heating zone <NUM> can have many shapes, such as a triangle, a quadrilateral, a circle, a circular ring, etc., and a circular configuration is taken as an example. The outer heating zone <NUM> has an annular shape and is sleeved outside the inner heating zone <NUM>. The inner heating zone <NUM> mainly affects the heating efficiency of the middle part of the coil disk, and the outer heating zone <NUM> mainly affects the heating efficiency of the peripheral area of the coil disk.

The inner magnetic strip <NUM> can have many shapes, such as a long strip, a circle, a sector, and so on. There are a plurality of inner magnetic strips <NUM>. One end of the plurality of inner magnetic strips <NUM> extends toward the middle of the inner heating zone <NUM>, and the other end is radiatedly around the inner heating zone <NUM>. Similarly, the outer magnetic strip <NUM> can also have many shapes, such as a long strip, a circle, a sector, and so on. There are a plurality of outer magnetic strips <NUM>. One end of the plurality of outer magnetic strips <NUM> extends at the junction of the outer heating zone <NUM> and the inner heating zone <NUM>, and the other end is radiatedly around the outer heat exchange heating zone.

There are many ways to realize that the area of the outer magnetic strip <NUM> covering the outer heating zone <NUM> is larger than the area of the inner magnetic strip <NUM> covering the inner heating zone <NUM>. When the coverage area of a single outer magnetic strip <NUM> is equivalent to that of a single inner magnetic strip <NUM>, the number of outer magnetic strips <NUM> is increased, and the arrangement density of the outer magnetic strips <NUM> in the outer heating zone <NUM> is increased, so as to achieve the purpose of increasing the total coverage area. When the number of outer magnetic strips <NUM> is equal to the number of inner magnetic strips <NUM>, the area of a single outer magnetic strip <NUM> is increased to increase the total area covered by the outer magnetic strip <NUM>, so as to achieve the purpose of enhancing the magnetic field strength of the outer heating zone <NUM>. When the number of the outer magnetic strips <NUM> is greater than the number of the inner magnetic strips <NUM>, the outer magnetic strips <NUM> and the inner magnetic strips <NUM> are independent of each other. In this way, only the number of magnetic strips needs to be adjusted, and the purpose of increasing the magnetic field strength can be simply achieved.

It is worth noting that in some embodiments, the inner magnetic strip <NUM> and the outer magnetic stripe <NUM> may be integrally formed. At this time, the width of the magnetic strip gradually increases along the direction from the inner heating zone <NUM> to the outer heating zone <NUM>, so that the magnetic field length of a single magnetic strip gradually increases along the length of the magnetic strip.

In addition, regarding the number of heating zones on the coil plate, the number of heating zones can be many, not only including the inner heating zone <NUM> and the outer heating zone <NUM>, such as three, four, etc.. In this embodiment, only two heating zones are taken as an example for description.

In this embodiment, the area of the outer magnetic stripe <NUM> covering the outer heating zone <NUM> is larger than the area of the inner magnetic stripe <NUM> covering the inner heating zone <NUM>. Through the increase of the magnetic field intensity of the outer coil winding <NUM> of the outer heating zone <NUM>, the difference in magnetic field intensity between the positions of the outer coil winding <NUM> and the inner coil winding <NUM> is greatly reduced. The intensity of the magnetic field in the middle and the periphery of the coil disk is equal, so that the heating efficiency of the coil disk on the middle and the circumference of the pot is equal, so that the pot can be uniformly heated. At the same time, by increasing the magnetic field strength of the outer coil, the utilization rate of the outer coil is greatly increased, which is beneficial to improve the working efficiency of the coil disk.

As shown in FIG <NUM> to FIG <NUM>, the structure and positional relationship of the coil windings and the magnetic strips in the inner heating zone <NUM> and the outer heating zone <NUM> are respectively explained below.

In order to further improve the heating efficiency of the inner heating zone <NUM>, an inner coil winding <NUM> is wound in the inner heating zone <NUM>. The inner coil winding <NUM> has an inner plane heating winding <NUM> located in the middle of the inner heating zone <NUM>, and an inner inclined heating winding <NUM> located at the edge of the inner heating zone <NUM> and inclined upward. The inner magnetic strip <NUM> includes an inner plane section <NUM> corresponding to the inner plane heating winding <NUM> and an inner inclined section <NUM> corresponding to the inner inclined heating winding <NUM>.

In this embodiment, a middle of the inner coil winding <NUM> is horizontal, and the surrounding extends obliquely upward from the horizontal portion. That is, the center of the inner coil winding <NUM> is in a plane (inner plane heating winding <NUM>), and the edge of the inner coil winding <NUM> is in an inclined plane upward from the plane portion (inner inclined heating winding <NUM>). Inclination refers to the extension trend, so there are many specific implementation methods, such as plane inclination, curved surface inclination, wave surface inclination, and so on. The coil density of the inclined portion is greater than the coil density of the plane portion in the radial direction of the inner coil winding <NUM>. The inner magnetic strip <NUM> is provided on the inner inclined section <NUM> corresponding to the inner inclined heating winding <NUM>, such that the inner inclined section <NUM> compensates for the magnetic field strength of the inner inclined heating winding <NUM>, so that the magnetic field strength of the area where the inner inclined heating winding <NUM> and the inner plane heating winding <NUM> are located are equal, thereby facilitating uniform heating. In addition, through the arrangement of the inner inclined heating winding <NUM>, while increasing the heating efficiency of the edge of the inner heating zone <NUM>, the inner inclined heating winding <NUM> is closer to the pot, which is beneficial to heating the pot.

In addition, in order to improve the heating uniformity of the inner heating zone <NUM> of the coil disk, the width of the inner magnetic strip <NUM> gradually increases from the middle to the edge of the inner heating zone <NUM>. As the width of the inner magnetic strip <NUM> increases, the intensity of the magnetic field also increases with the extension direction of the magnetic strip, thereby compensating the inner coil winding <NUM> whose area is gradually increasing, and greatly reducing the distance difference between two adjacent inner magnetic strips <NUM>, so that the heating efficiency in the middle and the periphery of the inner heating zone <NUM> is equivalent.

In some embodiments, in order to further improve the heating efficiency in the middle of the coil disk, the inner inclined heating winding <NUM> is arc-shaped, and the inner inclined section <NUM> is arc-shaped corresponding to the inner inclined heating winding <NUM>, such that the distance between the inner inclined section <NUM> and the inner inclined heating winding <NUM> is equivalent to the distance between the inner plane section <NUM> and the inner plane heating winding <NUM>.

In this embodiment, the concave arc shape of the inner inclined heating winding <NUM> does not affect the operation of the inner plane heating winding <NUM>, and the number of coil windings is increased within a limited height, thereby increasing the working efficiency of the inner inclined heating winding <NUM> in a limited height space. The inner inclined section <NUM> extends in an arc shape along the inner inclined heating winding <NUM>, the inner inclined section <NUM> not only provides sufficient magnetic field strength for the inner inclined heating winding <NUM>, but also maintains a distance equivalent to the inner plane section <NUM> to the inner plane heating winding <NUM>. The heating effect of the inner inclined heating winding <NUM> and the inner plane heating winding <NUM> are equivalent, which is beneficial to uniform heating.

In another embodiments, in order to improve the heating efficiency at the middle position of the inner heating zone <NUM>, the inner magnetic strip <NUM> further includes a protruding section <NUM>. The protruding section <NUM> is connected to an end of the inner plane section <NUM> away from the inner inclined section <NUM>, and the protruding section <NUM> is perpendicular to the inner plane section <NUM>. The protruding section <NUM> is along the height direction of the coil disk, and is centrally provided at the middle position of the inner heating zone <NUM>. The intensity of the magnetic field in the middle of the inner heating zone <NUM> is greatly increased, so that the heating efficiency in the middle of the inner heating zone <NUM> is beneficially improved. It is beneficial to improve the heating efficiency in a limited space, fully and reasonably utilize the space, and improve the compactness of the structure.

It is worth noting that the inner support structure <NUM> can have many shapes, and the overall shape is columnar as an example. In some embodiments, in order to improve the installation stability of the protruding section <NUM> and to make reasonable use of space, a mounting hole <NUM> is defined at the bottom of the inner support structure <NUM> for the protruding section <NUM> of the inner magnetic strip <NUM> to be installed. The protruding section <NUM> extends vertically upward from the mounting hole <NUM> and is inserted into the inner support structure <NUM>, and the mounting hole <NUM> penetrates the inner support structure <NUM> along the height direction of the inner support structure <NUM>.

In order to improve the installation stability and convenience of the inner coil winding <NUM>, an inner support structure <NUM> is provided in the middle of the inner heating zone <NUM>, and a first inner clamping rib <NUM> is provided on the inner support structure <NUM>. A first inner winding gap <NUM> is formed between the first inner clamping rib <NUM> and the coil support <NUM>, and the inner coil winding <NUM> is disposed in the first inner winding gap <NUM>. The first inner clamping rib <NUM> can have many shapes, taking a straight section and an arc section as an example. The first inner winding gap <NUM> may also have a straight section and an arc section, so as to correspond to the inner plane heating winding <NUM> and the inner inclined heating winding <NUM> of the inner coil winding <NUM>.

One end of the first inner clamping rib <NUM> is fixedly connected to the inner support structure <NUM>, and the other end extends from the inner support structure <NUM> to the edge of the inner heating zone <NUM>. The first inner clamping rib <NUM>, the inner support structure <NUM> and the coil support <NUM> are enclosed to form a first inner winding gap <NUM>. The plurality of first inner clamping ribs <NUM> are in a ring shape along the support structure, so that the first inner winding gaps are in a ring shape, which facilitates the winding of the inner coil winding <NUM>. The shape of the inner coil winding <NUM> can be realized by adjusting the arrangement of the first inner clamping rib <NUM>. During the winding process of the inner coil winding <NUM>, only the enameled wire needs to be clamped in the first inner winding gap <NUM>. The enameled wire can be wound in the first inner winding gap <NUM> simply and reliably. The windings in the first inner winding gap <NUM> are densely wound as an example.

In order to improve the heating efficiency of the inner heating zone <NUM>, make full and reasonable use of space, and reduce the area of the coil disk, the coil disk also includes a second inner clamping rib. One end of the second inner clamping rib is connected to the inner support structure <NUM> and is located above the first inner clamping rib <NUM>. A second inner winding gap (not shown) is formed between the second inner clamping rib and the first inner clamping rib <NUM>, and the inner coil winding <NUM> is disposed in the second inner winding gap (not shown).

In this embodiment, the shape of the second inner clamping rib is similar to the shape of the first inner clamping rib <NUM>, and also has a straight section and an arc section. The second inner clamping rib corresponds to the first inner clamping rib <NUM>, so that a second inner limiting gap having a straight section and an arc-shaped section is formed between the second inner clamping rib and the first inner clamping rib <NUM>. In order to improve the stability of the coil winding in the second inner limit gap, the width of the first inner clamping rib <NUM> is greater than the width of the second inner clamping rib. The length of the first inner clamping rib <NUM> is greater than the length of the second inner clamping rib. The plurality of second inner clamping ribs are arranged along the circumferential direction of the inner support structure <NUM> and corresponding to the first inner clamping ribs <NUM>, so that the second inner limiting gaps are in a circular ring along the circumferential direction of the inner support structure <NUM>. During the winding process of the inner coil winding <NUM>, only the enameled wire needs to be clamped in the first inner winding gap <NUM> and the second winding gap. The enameled wire can be simply and reliably wound in the first inner winding gap <NUM> and the second winding gap. The windings in the second inner winding gap (not shown) are densely wound as an example. Through the arrangement of the second inner clamping rib, a double-layer coil structure is formed in the middle of the coil winding (the upper and lower layers are densely wound), which is beneficial to greatly improve the heating efficiency of the inner heating zone <NUM>.

In order to improve the heating efficiency of the inner heating zone <NUM> and make full and reasonable use of the space, while simplifying the processing technology of the coil disk, the coil disk further includes an inner isolation rib. A plurality of the inner isolation ribs are arranged along the length direction of the first inner clamping rib <NUM>, such that a plurality of inner winding grooves along the length direction of the first inner clamping rib <NUM> are formed on the first inner clamping rib <NUM>.

In this embodiment, the cross-sectional shape of the inner isolation ribs can have various shapes, such as triangles, squares and other polygons. The inner isolation ribs may extend along the width direction of the first inner clamping rib <NUM>, and the inner isolation ribs extend in a concave arc, so that a plurality of inner isolation ribs can be enclosed to form a circular ring. The inner isolation ribs on the same first inner clamping rib <NUM> are arranged along the length direction of the first inner clamping rib <NUM>. The inner isolation ribs at the same position on the adjacent first inner clamping ribs <NUM> are arranged along the circumference of the inner support structure <NUM> to form an inner winding groove extending along the circumference of the inner support structure <NUM>. The number of coils that can be wound in the same inner winding groove can be set according to requirements, such as <NUM> turn, <NUM> turns, <NUM> turns, etc. The formation of the inner coil winding <NUM> through the inner winding groove takes sparse winding as an example. The connection between the first inner clamping rib <NUM>, the inner isolation rib and the inner support structure <NUM> may be detachable (through screws, buckles, glue, etc.) connection, or may be integrally formed. Compared with the solution of providing the first inner clamping rib <NUM> and the second inner clamping rib at the same time, the solution of providing the first inner clamping rib <NUM> and the inner isolation rib is easier to implement. Through the arrangement of the inner isolation ribs, a double-layer coil structure is formed in the middle of the coil winding (the lower layer is densely wound and the upper layer is sparsely wound), which is beneficial to greatly improve the heating efficiency of the inner heating zone <NUM>.

In order to further improve the heating efficiency of the outer heating zone <NUM>, an outer coil winding <NUM> is wound in the outer heating zone <NUM>. The outer coil winding <NUM> has an outer plane heating winding <NUM> located in the middle of the outer heating zone <NUM>, and an outer inclined heating winding <NUM> located at the edge and inclined upward. The outer magnetic strip <NUM> includes an outer plane section <NUM> corresponding to the outer plane heating winding <NUM> and an outer inclined section <NUM> corresponding to the outer inclined heating winding.

In this embodiment, the portion of the outer coil winding <NUM> close to the outer support structure <NUM> is horizontal, and the surrounding portion extends obliquely upward from the horizontal portion. That is, the center of the outer coil winding <NUM> is in a plane (outer plane heating winding <NUM>), and the edge of the outer coil winding <NUM> is in an inclined plane upward from the plane portion (outer inclined heating winding <NUM>). Inclination refers to the extension trend, so there are many specific implementation methods, such as plane inclination, curved surface inclination, wave surface inclination, and so on. The coil density of the inclined portion is greater than the coil density of the plane portion in the radial direction of the outer coil winding <NUM>. The outer magnetic strip <NUM> is provided on the outer inclined section <NUM> corresponding to the outer inclined heating winding <NUM>, such that the outer inclined section <NUM> compensates for the magnetic field strength of the outer inclined heating winding <NUM>, so that the magnetic field strength of the area where the outer inclined heating winding <NUM> and the outer plane heating winding <NUM> are located are equal, thereby facilitating uniform heating. In addition, through the arrangement of the outer inclined heating winding <NUM>, while increasing the heating efficiency of the edge of the outer heating zone3, the outer inclined heating winding <NUM> is closer to the pot, which is beneficial to heating the pot.

In addition, in order to improve the heating uniformity of the outer heating zone <NUM> of the coil disk, the width of the outer magnetic strip <NUM> gradually increases from the middle to the edge of the outer heating zone <NUM>. As the width of the outer magnetic strip <NUM> increases, the intensity of the magnetic field also increases with the extension direction of the magnetic strip, thereby compensating the outer coil winding <NUM> whose area is gradually increasing, and greatly reducing the distance difference between two adjacent outer magnetic strips <NUM>, so that the heating efficiency in the middle and the periphery of the outer heating zone <NUM> is equivalent.

In some embodiments, in order to further improve the heating efficiency of the outer heating zone <NUM> of the coil disk, the outer inclined heating winding <NUM> is arc-shaped, and the outer inclined section <NUM> is arc-shaped corresponding to the outer inclined heating winding <NUM>, such that the distance between the outer inclined section <NUM> and the outer inclined heating winding <NUM> is equivalent to the distance between the outer plane section <NUM> and the outer plane heating winding <NUM>.

In this embodiment, the concave arc shape of the outer inclined heating winding <NUM> does not affect the operation of the outer plane heating winding <NUM>, and the number of coil windings is increased within a limited height, thereby increasing the working efficiency of the outer inclined heating winding <NUM> in a limited height space. The outer inclined section <NUM> extends in an arc shape along the outer inclined heating winding <NUM>, the outer inclined section <NUM> not only provides sufficient magnetic field strength for the outer inclined heating winding <NUM>, but also maintains a distance equivalent to the outer plane section <NUM> to the outer plane heating winding <NUM>. The heating effect of the outer inclined heating winding <NUM> and the outer plane heating winding <NUM> are equivalent, which is beneficial to uniform heating.

In order to improve the installation stability and convenience of the outer coil winding <NUM>, an outer support structure <NUM> is provided between the inner heating zone <NUM> and the outer heating zone <NUM>, and a first outer clamping rib <NUM> is provided on the outer support structure <NUM>. A first outer winding gap <NUM> is formed between the first outer clamping rib <NUM> and the coil support <NUM>, and the outer coil winding <NUM> is disposed in the first outer winding gap <NUM>. The first outer clamping rib <NUM> can have many shapes, taking a straight section and an arc section as an example. The first outer winding gap <NUM> may also have a straight section and an arc section, so as to correspond to the outer plane heating winding <NUM> and the outer inclined heating winding <NUM> of the outer coil winding <NUM>.

One end of the first outer clamping rib <NUM> is fixedly connected to the outer support structure <NUM>, and the other end extends from the outer support structure <NUM> to the edge of the outer heating zone <NUM>. The first outer clamping rib <NUM>, the outer support structure <NUM> and the coil support <NUM> are enclosed to form a first outer winding gap <NUM>. The plurality of first outer clamping ribs <NUM> are in a ring shape along the support structure, so that the first outer winding gaps are in a ring shape, which facilitates the winding of the outer coil winding <NUM>. The shape of the outer coil winding <NUM> can be realized by adjusting the arrangement of the first outer clamping rib <NUM>. During the winding process of the outer coil winding <NUM>, only the enameled wire needs to be clamped in the first outer winding gap <NUM>. The enameled wire can be wound in the first outer winding gap <NUM> simply and reliably. The windings in the first outer winding gap <NUM> are densely wound as an example.

In order to improve the heating efficiency of the outer heating zone <NUM>, make full and reasonable use of space, and reduce the area of the coil disk, the coil disk also includes a second outer clamping rib <NUM>. One end of the second outer clamping rib <NUM> is connected to the outer support structure <NUM> and is located above the first outer clamping rib <NUM>. A second outer winding gap <NUM> is formed between the second outer clamping rib <NUM> and the first outer clamping rib <NUM>, and the outer coil winding <NUM> is disposed in the second outer winding gap <NUM>.

In this embodiment, the shape of the second outer clamping rib <NUM> is similar to the shape of the first outer clamping rib <NUM>, and also has a straight section and an arc section. The second outer clamping rib <NUM> corresponds to the first outer clamping rib <NUM>, so that a second outer limiting gap having a straight section and an arc-shaped section is formed between the second outer clamping rib <NUM> and the first outer clamping rib <NUM>. In order to improve the stability of the coil winding in the second outer limit gap, the width of the first outer clamping rib <NUM> is greater than the width of the second outer clamping rib <NUM>. The length of the first outer clamping rib <NUM> is greater than the length of the second outer clamping rib <NUM>. The plurality of second outer clamping ribs <NUM> are arranged along the circumferential direction of the outer support structure <NUM> and corresponding to the first outer clamping ribs <NUM>, so that the second outer limiting gaps are in a circular ring along the circumferential direction of the outer support structure <NUM>. During the winding process of the outer coil winding <NUM>, only the enameled wire needs to be clamped in the first outer winding gap <NUM> and the second winding gap. The enameled wire can be simply and reliably wound in the first outer winding gap <NUM> and the second winding gap. The windings in the second outer winding gap <NUM> are densely wound as an example. Through the arrangement of the second outer clamping rib <NUM>, a double-layer coil structure is formed in the middle of the coil winding (the upper and lower layers are densely wound), which is beneficial to greatly improve the heating efficiency of the outer heating zone <NUM>.

In order to improve the heating efficiency of the outer heating zone <NUM> and make full and reasonable use of the space, while simplifying the processing technology of the coil disk, the coil disk further includes an outer isolation rib <NUM>. A plurality of the outer isolation ribs <NUM> are arranged along the length direction of the first outer clamping rib <NUM>, such that a plurality of outer winding grooves <NUM> along the length direction of the first outer clamping rib <NUM> are formed on the first outer clamping rib <NUM>.

In this embodiment, the cross-sectional shape of the outer isolation ribs <NUM> can have various shapes, such as triangles, squares and other polygons. The outer isolation ribs <NUM> may extend along the width direction of the first outer clamping rib <NUM>, and the outer isolation ribs <NUM> extend in a concave arc, so that a plurality of outer isolation ribs <NUM> can be enclosed to form a circular ring. The outer isolation ribs <NUM> on the same first outer clamping rib <NUM> are arranged along the length direction of the first outer clamping rib <NUM>. The outer isolation ribs <NUM> at the same position on the adjacent first outer clamping ribs <NUM> are arranged along the circumference of the outer support structure <NUM> to form an outer winding groove <NUM> extending along the circumference of the outer support structure <NUM>. The number of coils that can be wound in the same outer winding groove <NUM> can be set according to requirements, such as <NUM> turn, <NUM> turns, <NUM> turns, etc. The formation of the outer coil winding <NUM> through the outer winding groove <NUM> takes sparse winding as an example. The connection between the first outer clamping rib <NUM>, the outer isolation rib <NUM> and the outer support structure <NUM> may be detachable (through screws, buckles, glue, etc.) connection, or may be integrally formed. Compared with the solution of providing the first outer clamping rib <NUM> and the second outer clamping rib <NUM> at the same time, the solution of providing the first outer clamping rib <NUM> and the outer isolation rib <NUM> is easier to implement. Through the arrangement of the outer isolation ribs <NUM>, a double-layer coil structure is formed in the middle of the coil winding (the lower layer is densely wound and the upper layer is sparsely wound), which is beneficial to greatly improve the heating efficiency of the outer heating zone <NUM>.

As shown in <FIG>, in an embodiment of the present disclosure, the coil disk includes:.

In this embodiment, the base plate <NUM> can have various shapes, such as a flat plate shape, an arc-shaped plate shape, or a three-dimensional structure composed of multiple parts such as a bottom and a side wall. In this embodiment, taking the base plate including the bottom and the sidewalls extending upward from the bottom as an example, the winding area can be provided on any desired area on the base plate <NUM>, such as the bottom and the side walls. The winding area is the area where heat is generated by the pot and the like when the coil base is working, and the coil is wound in the winding area.

The limit piece <NUM> can have many shapes, and different shapes of the limit piece <NUM> can be selected according to different shapes of the base plate <NUM>, and the shape of the limit piece <NUM> can also be set according to the requirements of different working conditions. In this embodiment, the long strip is taken as an example. One end of the limit piece <NUM> is connected to the base plate <NUM>, and the other end of the limit piece <NUM> extends along the extending direction of the base plate <NUM>. The limit piece <NUM> is made of insulating material, such as hard plastic. There are many ways to connect the limit piece <NUM> and the base plate <NUM>, such as screw connection, snap connection, glue, etc.. In some embodiments, the limit piece <NUM> and the base plate <NUM> may also be integrally formed.

The limit piece <NUM> can be provided on the inner side of the base plate <NUM> or on the outer side of the base plate <NUM>. When the limit piece <NUM> is provided on the inner side of the base plate <NUM>, a winding gap is formed between the limit piece <NUM> and the inner side wall of the base plate <NUM>. When the limit piece <NUM> is provided on the outer side of the base plate <NUM>, a winding gap is formed between the limit piece <NUM> and the outer side wall of the base plate <NUM>. When the coil is wound into the winding gap, the coil is clamped by the limit piece <NUM> and the side wall of the base plate <NUM>, so that the coil is fixed.

In this embodiment, the limit piece <NUM> is provided on the base plate <NUM> to form a winding gap between the limit piece <NUM> and the inner or outer side wall of the base plate <NUM>, and the coil is wound in the winding gap, such that the coil is clamped by the side wall of the base plate <NUM> and the limit piece <NUM>, so as to realize the fixation of the coil. Compared with the existing fixing method, the fixing of the coil does not require the use of glue, so that no peculiar smell will be generated when the coil is heated, which is beneficial to the user's use. In addition, the efficiency of winding and fixing the coil in this way is greatly increased, and the stability of the coil after winding is greatly increased.

In order to further improve the stability of installing the coil, there are a plurality of limit pieces <NUM>, the plurality of the limit pieces <NUM> are spaced apart from each other along the circumferential direction of the base plate <NUM>. By arranging a plurality of limit pieces <NUM> along the circumferential direction of the base plate <NUM>, a plurality of limit gaps are distributed along the circumferential direction of the base plate <NUM>. The coil is clamped by the limit piece <NUM> and the base plate <NUM> at multiple positions in the extending direction, so that the installation of the coil is more stable and reliable.

It is worth noting that in some embodiments, the arrangement shape of the limit piece <NUM> is the winding shape of the coil. The shape of the coil can be realized by setting the arrangement shape of the limit piece <NUM> (the first loop of the coil is located at the connection between the limit piece <NUM> and the base plate <NUM>, and the coil is wound on this basis). In this way, during the process of manufacturing the coil disk, it is more conducive to convenient and reliable control of the shape of the coil.

The following takes a specific structure of the base plate <NUM> as an example to describe the structure of the coil disk in detail. The base plate <NUM> has a receiving cavity, and the winding area includes a bottom winding area located at the bottom of the base plate and a peripheral winding area located on the side wall <NUM> of the base plate. In this embodiment, the base plate <NUM> includes a bottom and a peripheral side wall surrounding the periphery of the bottom. The peripheral side wall extends from the peripheral edge of the bottom to one side of the bottom to enclose and form a receiving cavity for the container to be heated (such as a pot) to be installed. In order to heat the container to be heated more uniformly, or to achieve more heating methods, a winding area is provided on both the bottom and the peripheral side wall of the base plate.

In order to improve the stability of installing the coil, the limit piece <NUM> includes a bottom limit piece <NUM>, and the bottom of the base plate is provided with a support structure <NUM> extending toward the inside of the base plate. One end of the bottom limit piece <NUM> is fixedly connected to the support structure <NUM>. The other end of the bottom limit piece <NUM> extends along the bottom surface <NUM> of the base plate to form a bottom winding gap <NUM> between the bottom limit piece <NUM> and the bottom surface <NUM> of the base plate.

In this embodiment, the support structure <NUM> can have many shapes. Taking the columnar shape as an example, any structure that can provide a connection for the bottom limit piece <NUM> and has a gap between the connection point and the bottom surface <NUM> of the base plate is acceptable. The support structure <NUM> is located at the middle of the bottom and extends to the middle of the base plate, and a plurality of bottom limit pieces <NUM> radiate from the support structure <NUM> to the surroundings. The connection position of the bottom limit piece <NUM> and the support structure <NUM> can be set according to the radial size of the winding. Different connection positions determine the different sizes of the bottom winding gap <NUM>. The larger the radial size of the winding, the larger the bottom winding gap <NUM>, and the smaller the radial size of the winding, the smaller the bottom winding gap <NUM>. The other end of the bottom limit piece <NUM> extends along the bottom surface <NUM> so that the bottom winding gap <NUM> is uniform. When the winding enters the bottom winding gap <NUM>, the winding can be stably clamped no matter where it is. In addition, the support structure <NUM> and the bottom limit piece <NUM> are provided inside the base plate, such that the operation of the limit piece <NUM> is interfered by the external environment as little as possible, so that the stability of the limit piece <NUM> is improved.

In some embodiments, a bottom heat dissipation opening <NUM> is defined on the bottom of the base plate corresponding to the position of the bottom limit piece <NUM>. The shape and size of the bottom heat dissipation opening <NUM> are equivalent to those of the bottom limit piece <NUM>, and the bottom heat dissipation opening <NUM> is located directly below the bottom limit piece <NUM>. The bottom heat dissipation opening <NUM> allows the bottom limit piece <NUM> to dissipate heat very well, which is beneficial to the stable operation of the bottom winding area. Meanwhile, the bottom heat dissipation opening <NUM> enables the bottom limit piece <NUM> to grow integrally with the base plate <NUM>, reducing the difficulty of forming the bottom limit piece <NUM>, that is, the bottom heat dissipation opening <NUM> facilitates the formation of the bottom limit piece <NUM>.

In order to improve the stability of installing the side coil, the limit piece <NUM> includes a side wall limit piece <NUM>, and the base plate side wall <NUM> is provided with a rib <NUM> extending toward the inside of the base plate <NUM>. One end of the side wall limit piece <NUM> is fixedly connected to the support rib <NUM>. The other end of the side wall limit piece <NUM> extends from bottom to top along the base plate side wall <NUM> to form a side wall winding gap <NUM> between the side wall limit piece <NUM> and the base plate side wall <NUM>.

In this embodiment, the rib <NUM> can have many shapes. Take the circular ring shape as an example, any structure that can provide a connection for the side wall limit piece <NUM> and has a gap between the connection point and the base plate side wall <NUM> is acceptable. The rib <NUM> is located at the edge of the bottom and extends upward, and a plurality of side wall limit pieces <NUM> extend from different positions of the rib <NUM> along the inner side wall of the base plate <NUM>. The connection position of the side wall limit piece <NUM> and the rib <NUM> can be set according to the radial size of the winding. Different connection positions determine the different sizes of the side wall winding gap <NUM>. The larger the radial dimension of the winding is, the larger the side wall winding gap <NUM> is, and the smaller the radial dimension of the winding is, the smaller the side wall winding gap <NUM> is. The other end of the side wall limiting piece <NUM> extends along the inner side wall of the base plate <NUM>, so that the side wall winding gap <NUM> is uniform. When the winding enters the side wall winding gap <NUM>, no matter where it is, the winding can be stably clamped. In addition, the rib <NUM> and the side wall limit piece <NUM> are inside the base plate <NUM>, so that the operation of the limit piece <NUM> is interfered by the external environment as little as possible, so that the stability of the limit piece <NUM> is improved.

In some embodiments, a side wall heat dissipation opening <NUM> is defined on the bottom of the base plate <NUM> corresponding to the position of the side wall limit piece <NUM>. The shape and size of the side wall heat dissipation opening <NUM> are equivalent to the shape and size of the side wall limit piece <NUM>, and the side wall heat dissipation opening <NUM> is located outside the side wall limit piece <NUM>. The side wall heat dissipation opening <NUM> allows the side wall limit piece <NUM> to dissipate heat very well, which is beneficial to the stable operation of the side heating zone. At the same time, the side wall heat dissipation opening <NUM> makes the side wall limit piece <NUM> integrated with the base plate <NUM>, thus the difficulty of the forming the side wall limit piece <NUM> is reduced, that is, the side wall heat dissipation opening <NUM> is beneficial to the formation of the side wall limit piece <NUM>.

It is worth noting that the inner wall of the base plate <NUM> can have many shapes, taking an arc shape as an example. The inner side wall of the base plate <NUM> has a concave arc, and the side wall limit piece <NUM> has a concave arc, so that the side wall winding gap <NUM> is uniform along the length direction of the side wall limit piece <NUM>. In this embodiment, the shape of the sidewall limit piece <NUM> is equivalent to the shape of the inner side wall of the base plate, and the curvatures of the two are equivalent, so that the side wall winding gap <NUM> is very uniform, which is beneficial to the stable installation of the winding.

In some embodiments, in order to further improve the stability of the coil winding, an inner winding groove <NUM> is formed in the middle of the base plate <NUM>. The bottom of the inner winding groove <NUM> is provided with an inner lead <NUM> hole for the inner lead <NUM> to pass through, so that the inner lead <NUM> is pressed tightly by the winding in the inner winding groove <NUM>; and/or, an outer winding groove <NUM> is formed on the edge of the base plate <NUM> for installation of the outer lead <NUM> after the winding is completed.

In this embodiment, there are many ways to form the inner winding groove <NUM>, the inner winding groove <NUM> can be directly defined on the base plate <NUM>, or formed by arranging components on the base plate <NUM>, for example, by arranging a plurality of limit ribs <NUM> to surround it. The length of the inner winding groove <NUM> can be set as required, such as <NUM>/<NUM> circle, <NUM>/<NUM> circle, complete circle, etc. It is worth noting that the inner lead <NUM> is a wire drawn from the wire inlet end of the winding, and the outer lead <NUM> is a wire drawn from the wire outlet end of the winding. The inner lead <NUM> first passes through the inner winding groove <NUM> through the inner lead <NUM> hole to pass through the inner winding groove <NUM>. The winding is then wound in the inner winding groove <NUM>, and the winding (the winding includes at least the first winding coil) in the inner winding groove <NUM> is pressed above the inner lead <NUM>. The end of the inner lead <NUM> can be very stably fixed, thereby avoiding the dimensional error caused by the displacement of the winding in the extension direction, which is beneficial to improve the accuracy of the winding coil. It is worth noting that there is a distance between the inner winding groove <NUM> and the bottom winding gap <NUM>, and the inner winding groove <NUM> and the bottom winding gap <NUM> are connected by a transition section <NUM> of the wire. It can not only ensure the accuracy of the position and quantity of the winding coils, but also set the position of the inner winding groove <NUM> according to requirements, which is beneficial to improve the rationality of the structural layout of the coil disk base <NUM>, and is beneficial to improve the stability of the coil disk base <NUM> in use.

Similarly, the outer winding groove <NUM> can also be formed in multiple ways like the inner winding groove <NUM>, and its length can also be a <NUM>/<NUM> circle, a <NUM>/<NUM> circle, or complete circle. The outer winding groove <NUM> is provided on the edge of the base plate <NUM> to fix the winding after winding. In some embodiments, in order to further facilitate the fixing of the outer lead <NUM>, the outer winding groove <NUM> is formed at a higher position than the inner winding groove <NUM>, so that the outer winding groove <NUM> is closer to the position where the winding is to be completed. When the winding is about to end, the winding extends along the outer winding groove <NUM>, and at least the last coil is provided in the outer winding groove <NUM>. After the winding is completed, the outer lead <NUM> extends from the outer winding groove <NUM>.

The coil disk usually also includes a disk base <NUM> matched with the coil disk group, and the disk base <NUM> is fixedly connected to the coil disk group. When the base plate <NUM> has a receiving cavity, the disk base <NUM> is installed in the receiving cavity, and the magnetic strip is corresponding to the winding coil. Specifically, the bottom of the disk base <NUM> is provided with an inner limit rib <NUM>, and the inner limit rib <NUM> is installed in the inner winding groove <NUM> of the base plate <NUM> on the side away from the disk base <NUM>. The bottom of the disk base <NUM> is provided with an outer limit rib <NUM>, and the side of the outer limit rib <NUM> away from the disk base <NUM> is installed in the outer winding groove <NUM> of the base plate <NUM>. On the side of the disk base <NUM> facing the base plate <NUM>, an inner limit rib <NUM> is provided corresponding to the inner winding groove <NUM>, and an outer limit rib <NUM> is provided corresponding to the outer winding groove <NUM>. When the winding is over, the inner limit rib <NUM> is installed in the inner winding groove <NUM> to suppress and limit the inner lead <NUM>, so as to achieve the purpose of further limiting the inner lead <NUM> (limiting the vertical direction and increasing the pressing strength); and the outer limit rib <NUM> is installed in the outer winding groove <NUM> to suppress and limit the outer lead <NUM>, so as to achieve the purpose of further limiting the outer lead <NUM> (limiting in the vertical direction and increasing the pressing strength).

It is understandable that in other embodiments, as shown in <FIG>, there are many ways to fix the inner lead <NUM> and the outer lead <NUM> to further fix the inner lead <NUM>. Here are two examples for illustration:
The bottom of the base plate <NUM> is provided with a positioning hole <NUM> penetrating the base plate <NUM> for the inner lead <NUM> to pass through and be fastened before winding. The aperture of the positioning hole <NUM> is <NUM> to <NUM>. The distance L between the center of the positioning hole <NUM> and the bottom winding gap <NUM> (the bottom limit gap <NUM> and the position close to the support structure <NUM>) is <NUM> to <NUM>. The positioning hole <NUM> is located inside the bottom winding gap <NUM>. The upper surface of the positioning hole <NUM> is flat or slightly lower than the surface of the base plate <NUM> near the bottom winding gap <NUM>, with a distance ranging from <NUM> to <NUM> (which facilitates the inner lead <NUM> to enter and pass through the positioning hole <NUM>). The bottom surface of the positioning hole <NUM> does not exceed the bottom surface of the base plate <NUM>, which facilitates the inner lead <NUM> to pass through the positioning hole.

The bottom of the base plate <NUM> is provided with a buckle groove <NUM> for the inner lead <NUM> to be installed and fastened before winding. Specifically, a buckle groove <NUM> is provided inside the bottom winding gap <NUM>. The opening of the buckle groove <NUM> is in a clockwise direction, and a groove retaining rib <NUM> is in a counterclockwise direction. The upper surface of the groove retaining rib <NUM> and the surface of the base plate <NUM> near the bottom winding gap <NUM> are flat or slightly lower than <NUM> to <NUM> (facilitating the inner lead <NUM> to enter and pass through the buckle groove <NUM>). The bottom surface of the groove retaining rib <NUM> does not exceed the bottom surface of the base plate <NUM>, which is beneficial for the inner lead <NUM> to extend from the buckle groove <NUM>. The buckle groove <NUM> is of an open type, and the shape of the buckle groove <NUM> and the groove retaining rib <NUM> is not limited to a long strip shape, and may be round, square, or the like.

The present disclosure further provides a coil disk. The coil disk includes a disk base and a coil disk base. The specific structure of the coil base refers to the above-mentioned embodiment. Since the coil disk adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here. The disk base is connected to the coil disk base.

The present disclosure further provides a cooking utensil. As shown in <FIG>, the cooking utensil includes a coil disk and a coil disk holder <NUM>. The specific structure of the cooking utensil refers to the above-mentioned embodiment. Since the cooking utensil adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. It is worth noting that the cooking utensil can be a cooking device that use coil electromagnetic heating, such as an electric rice cooker, an induction cooker, an electric oven, a microwave oven, and an electric oven.

In some embodiments, in order to improve the convenience of connecting the base <NUM> and the coil disk, the cooking utensil includes a base <NUM>, and a positioning column <NUM> is provided on the base <NUM>; the coil disk holder <NUM> or the disk base <NUM> is provided with a positioning hole <NUM> corresponding to the positioning column <NUM>; and the cooking utensil further includes a fastener <NUM>, and the fastener <NUM> is fixedly connected to the positioning column <NUM> passing through the positioning hole <NUM>.

In this embodiment, the positioning column <NUM> is vertically upward. The cross-section of the positioning column <NUM> can have many shapes, such as a circle, an ellipse, and a polygon. Take the shape of a circle as an example. Taking the positioning hole <NUM> defined on the coil disk holder <NUM> as an example. When the coil disk holder <NUM> is installed on the base <NUM>, the positioning hole <NUM> is sleeved on the positioning column <NUM>. The fastener <NUM> is fixedly connected to the positioning column <NUM> to prevent the positioning column <NUM> from falling off the positioning hole <NUM>. In this way, the assembly process between the coil disk holder <NUM> and the base <NUM> is greatly simplified, which is beneficial to improve the assembly efficiency of the coil disk holder <NUM>.

In order to better position the coil base holder <NUM>, the positioning column <NUM> is a stepped column. The positioning hole <NUM> is a stepped hole. The step of the positioning column <NUM> abuts the step of the positioning hole <NUM> to limit the distance between the base <NUM> and the coil base holder <NUM> or the disk base <NUM>. The large diameter end of the stepped shaft is located at the lower, and the small diameter end is located at the upper; the large diameter end of the stepped hole is located at the lower and the small diameter end is located at the upper. The top of the large-diameter end of the stepped shaft abuts against the top of the large-diameter end of the stepped hole to support the coil disk holder <NUM>, so that the distance between the base <NUM> and the coil disk holder <NUM> can be realized by the specific size.

There may be many ways to connect the fastener <NUM> to the positioning column, such as a snap connection, a direct snap connection, or an adhesive connection. In some embodiments, in order to further improve the connection efficiency, the positioning column <NUM> is extended out of the positioning hole <NUM>, and then under the action of pressure and/or high temperature, the protruding positioning post <NUM> is deformed, so that the size of the deformed portion is larger than the aperture of the positioning hole <NUM>, so as to realize the fixation of the positioning column <NUM> and the positioning hole <NUM>. Specifically, the fastener <NUM> is deformed from the part of the positioning column <NUM> extending out of the positioning hole <NUM> through extrusion and/or melting. In this embodiment, the hot pressing process is taken as an example, that is, heating and pressurizing the protruding portion of the positioning column <NUM> simultaneously. In this way, the connection process of the coil disk holder <NUM> and the base <NUM> is further greatly simplified, which is beneficial to further improve the assembling efficiency of cooking utensil.

The present disclosure provides a coil disk, which has an irregularly shaped heating zone, so that the heating effect can be more uniform.

In an embodiment of the present disclosure, as shown in <FIG>, the coil disk includes a disk base <NUM> and a first coil winding <NUM>. The peripheral side wall of the disk base <NUM> is provided with a first winding groove. The first coil winding <NUM> is wound in the first winding groove along a preset trajectory. The first coil winding <NUM> has an irregular shape to improve the uniformity of the heating effect of the coil disk.

It should be noted that the irregular shape of the first coil winding <NUM> includes at least the following two aspects. First, the first coil winding <NUM> has an irregular shape in the height direction of the peripheral side wall of the disk base. In this way, the first coil winding <NUM> can form multiple heating zones with height differences, thereby improving the uniformity of the heating effect of the coil disk. Second, the overall shape of the first coil winding <NUM> is irregular. For example, the first coil winding <NUM> may be in an oval shape or a polygonal shape, such that the first coil winding <NUM> can be adapted to an elliptical heating device or a polygonal heating device, thereby the distance between the heating device and the coil winding can be made smaller, so that the heating effect of the heating device can be more uniform.

Specifically, the above two effects will be described in detail in the first and second embodiments below.

In the first embodiment of the present disclosure, the preset trajectory has peaks and valleys. There is a height difference between the peak portion and the valley portion, so that the first coil winding <NUM> forms a plurality of heating zones with a height difference.

Since the first coil winding <NUM> of the coil disk of the present disclosure is wound in the first winding groove along a preset trajectory, the preset trajectory has peaks and valleys, and there is a height difference between the peaks and the valleys, so a plurality of heating zones with height differences can be formed, so that the heating zones can be decomposed. That is, the area with the strongest magnetic field has changed from an intermediate position to two heating positions in the peak heating zone and the valley heating zone. The strongest magnetic field in the peak heating zone is concentrated in the middle heating position of the peak heating zone. The strongest magnetic field in the valley heating zone is concentrated in the middle heating position of the valley heating zone. However, there is a height difference between the peak heating zone and the valley heating zone, and the intermediate heating positions of the two have different heights, so the uniformity of the heating effect of the coil disk can be further improved.

Further, as shown in <FIG>, the structure of the first coil winding <NUM> will now be described. In this embodiment, the first coil winding <NUM> includes an upper half-turn winding <NUM>, a transition winding <NUM>, and a lower half-turn winding <NUM> that are sequentially wound along the height direction of the disk base <NUM>. The upper half-turn winding <NUM> forms a first heating zone, the transition winding <NUM> forms a second heating zone, and the lower half-turn winding <NUM> forms a third heating zone. Since the first heating zone, the second heating zone, and the third heating zone are sequentially distributed in the height direction of the disk base <NUM>, the height of the strongest magnetic field of the first heating zone, the second heating zone and the third heating zone are different. Furthermore, the heights of the high-temperature heating zones of the first heating zone, the second heating zone, and the third heating zone can be made different, so that the uniformity of the heating effect of the coil disk in the height direction of the disk base <NUM> can be improved.

Further, as shown in <FIG>, in order to further improve the uniformity of the heating effect of the coil disk, in an embodiment of the present disclosure, the upper half-turn winding <NUM>, the transition winding <NUM> and the lower half-turn winding <NUM> are staggered along the circumferential direction of the disk base <NUM>, thus the uniformity of the heating effect of the first heating zone, the second heating zone, and the third heating zone in the circumferential direction of the disk base <NUM> can be further improved.

However, the design of this application is not limited to this, in other embodiments, the first coil winding <NUM> may further include N first half-turn windings sequentially wound along the height direction of the disk base <NUM>, and N is a positive integer greater than or equal to <NUM>. In addition, the first coil winding <NUM> may also include M second half-turn windings sequentially wound along the circumferential direction of the disk base <NUM>, and M is a positive integer greater than or equal to <NUM>.

Further, as shown in <FIG>, the structure of the first coil winding <NUM> will now be described in detail. In this embodiment, the first coil winding <NUM> includes a plurality of irregular toroidal coils in nested arrangement. Each of the irregular toroidal coils includes a plurality of groups of upper, transition, and lower sections connected in sequence; the upper sections of a plurality of the irregular toroidal coils constitute the upper half-turn winding <NUM>, the transition sections of a plurality of the irregular toroidal coils constitute the transition winding <NUM>, and the lower sections of the plurality of the irregular toroidal coils constitute the lower half-turn winding <NUM>.

Specifically, in this embodiment, the heads and ends of a plurality of the irregular toroidal coils are connected in sequence, and each irregular toroidal coil can be divided into multiple groups of upper section, transition section and lower section that are connected in sequence.

Further, in order to increase the strength of the magnetic line of induction of the first coil winding <NUM>, in an embodiment of the present disclosure, the disk base <NUM> further includes a magnetic strip holder <NUM> on which a magnetic strip <NUM> is provided; the magnetic strip <NUM> is corresponding to the upper half-turn winding <NUM> and/or the lower half-turn winding <NUM>.

Specifically, as shown in <FIG>, in the first embodiment, the magnetic strip <NUM> corresponds to the upper half-turn winding <NUM>. As shown in <FIG>, in the second embodiment, the magnetic strip <NUM> corresponds to the lower half-turn winding <NUM>. As shown in <FIG>, in the third embodiment, the magnetic strip <NUM> corresponds to the upper half-turn winding <NUM> and the lower half-turn winding <NUM>. Since the magnetic strip <NUM> corresponds to the upper half-turn winding <NUM> and/or the lower half-turn winding <NUM>, the magnetic strip <NUM> has the effect of condensing the magnetic induction lines generated by the upper half-turn winding <NUM> and/or the lower half-turn winding <NUM>. Therefore, the concentration density of the magnetic lines of induction can be increased, so that the heating device per unit area (not shown) can contact more magnetic lines of induction, so that the heating rate of the coil disk can be increased.

However, the design of the present disclosure is not limited to this. In other embodiments, the magnetic strip <NUM> may also correspond to the transition winding <NUM>.

Further, as shown in <FIG>, a second winding groove is provided on the bottom wall of the disk base <NUM>, and a second coil winding <NUM> is wound in the second winding groove. The second coil winding <NUM> on the bottom and the first coil winding <NUM> on the side wall can simultaneously heat the bottom and side walls of the heating device. In this way, tumbling heating can be realized, so that the heating effect of the coil disk is more uniform.

In an embodiment of the present disclosure, the second coil winding <NUM> includes a plurality of sub-coil windings (not shown). In this embodiment, the shapes of the multiple sub-coil windings are configured to fully cover the bottom of the disk base <NUM>. For example, in this embodiment, the bottom of the disk base <NUM> is circular, and the coil winding includes two semicircular sub-coil windings or four <NUM>° sector-shaped sub-coil windings.

Further, as shown in <FIG>, in an embodiment of the present disclosure, the second coil winding <NUM> has a concentric circular shape, and the second coil winding <NUM> is a sparsely wound coil winding, that is, the second coil winding <NUM> is sparsely wound. Sparse winding and dense winding are two common winding methods for coil windings. The advantages of the dense winding are the close contact between the wires, the strong magnetic field, the large area and the high efficiency. The shortcomings of the dense winding are poor heat dissipation and the enameled wire is prone to short circuit risks. The advantages of the sparse winding are convenient winding, good heat dissipation effect, less risk of short circuit, and easy quality control. The disadvantage of the sparse winding is that the space occupied by the winding is larger than that of the dense winding. On the one hand, the coupling between the windings is reduced, and the leakage inductance will be larger than that of the dense winding; on the other hand, the distributed capacitance between the wires of the sparse winding is larger, and the loss of the high frequency transformer working at a higher frequency will also increase.

In this embodiment, the second coil winding <NUM> has a concentric circular shape, and the second coil winding <NUM> is wound by a sparse winding process. In this way, the heat dissipation effect of the second coil winding <NUM> is good, and the quality is easy to control. However, the design of the present disclosure is not limited to this, in other embodiments, as shown in <FIG>, the second coil winding <NUM> may also have a polygonal shape, and the second coil winding <NUM> may be wound by a sparse winding or dense winding process.

Further, in a second embodiment of the present disclosure, as shown in <FIG>, considering that the disk base <NUM> of the conventional coil disk is mostly in a bowl shape, it can only be applied to a circular heating appliance <NUM> (such as a pot). In order to make the coil disk adaptable to pots of different shapes, in this embodiment, the first coil winding <NUM> is in an elliptical shape or a polygonal shape. The first coil winding <NUM> can be adapted to an elliptical heating device or a polygonal heating device, so that the distance between the heating device and the coil winding can be made smaller, so that the heating effect of the heating device can be more uniform. In this embodiment, the polygon includes quadrangular, hexagonal, octagonal and other shapes.

In an embodiment, the disk base <NUM> is provided with an accommodating cavity for placing a heating device, the accommodating cavity is configured to fit a shape of the heating device, and the first coil winding <NUM> is wound on an outer peripheral wall of the accommodating cavity. Specifically, in this embodiment, the accommodating cavity may be in an elliptical or polygonal shape.

The present disclosure further provides a cooking utensil (not shown). The cooking utensil includes the above coil disk. The specific structure of the coil disk refers to the above-mentioned embodiment. Since the cooking utensil in the present disclosure adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

It should be noted here that in this embodiment, the cooking utensil is an electric rice cooker. In other embodiments, the cooking utensil can also be an induction cooker, an electric pressure cooker, a cooking machine, an electric stew pot, a wall breaker, and the like.

Claim 1:
A coil disk, comprising:
a support structure (<NUM>) located in a middle of the coil disk;
a first clamping rib (<NUM>), a first end of the first clamping rib (<NUM>) being connected to the support structure (<NUM>), a second end of the first clamping rib (<NUM>) extending in a direction away from the support structure (<NUM>); and
a second clamping rib (<NUM>) located below the first clamping rib (<NUM>), a first end of the second clamping rib (<NUM>) being connected to the support structure (<NUM>), a second end of the second clamping rib (<NUM>) extending in a direction away from the support structure (<NUM>);
wherein the first clamping rib (<NUM>), the second clamping rib (<NUM>), and the support structure (<NUM>) are enclosed to form a clamping gap (<NUM>) for winding an enameled wire;
characterised in that the first clamping rib (<NUM>) and the second clamping rib (<NUM>) are integrally formed with the support structure (<NUM>).