CN115551138A

CN115551138A - Coil panel and electromagnetic heating cooking utensil

Info

Publication number: CN115551138A
Application number: CN202110747343.4A
Authority: CN
Inventors: 吴金华; 易亮; 王小鹰; 郭兴家; 张翼飞; 范吉昌
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-12-30

Abstract

The invention discloses a coil panel and an electromagnetic heating cooking utensil, wherein the coil panel comprises a panel seat and a plurality of coils, wherein the plurality of coils are dispersed and arranged on the panel seat at intervals instead of arranging a whole coil or arranging a plurality of coils of an inner ring and an outer ring.

Description

Coil panel and electromagnetic heating cooking utensil

Technical Field

The invention relates to the technical field of electromagnetic heating devices, in particular to a coil panel and an electromagnetic heating cooking utensil.

Background

In the household electrical appliance, the electromagnetic heating mode is almost completely popularized, taking an electromagnetic heating electric cooker as an example, a coil in a coil panel generating a magnetic field is conventionally wound around a central shaft of the coil panel, the coil is almost in a circular design, the generated magnetic field is converted into a thermal field on an inner pot, the thermal field almost surrounds the inner pot to form a heating area of a circle, when the electric cooker is used for cooking, because the bowl shape and the center of the inner pot are inwards designed, and because of the annular thermal field formed by the inner pot, when the electric cooker is used for cooking, because of a film formed on the bottom wall of the inner pot in the early stage of rice, heat bubbles formed at the bottom of the inner pot flush the side wall and the center inwards convex position of the inner pot, most of the heat of the bubbles is brought to the rice at the side wall and the center, the rice at other parts is heated unevenly, the cooked whole rice has the conditions of uneven moisture content, uneven hardness and the like, and the taste of a user is influenced.

Disclosure of Invention

The invention mainly aims to provide a coil panel and an electromagnetic heating cooking utensil, aiming at solving the technical problem of uneven electromagnetic heating in the prior art.

To achieve the above object, the present invention provides a coil disc, including:

a tray seat; and the number of the first and second groups,

and the coils are arranged on the disk seat at intervals and in a scattered manner.

Optionally, at least two of the coils are arranged to be able to pass current in opposite directions.

Optionally, at least two of said coils are arranged in parallel and independently powered to enable passage of current in opposite directions; or,

at least two coils are wound in opposite directions so as to be capable of being electrified with currents in opposite directions; or,

the plurality of coils are arranged in series.

Optionally, the number of the coils is at least three, the three coils are arranged at intervals along the circumferential direction of the disk seat, and among the three coils, one coil and the other two coils are arranged to be capable of being electrified with currents in opposite directions; or,

the coils are at least four, the four coils are arranged at intervals along the circumferential direction of the disk seat, and one of the four coils and two adjacent coils are arranged to be capable of being electrified with currents in opposite directions, and the other coil opposite to the coil is arranged to be capable of being electrified with currents in the same direction.

Optionally, the dish base has a first side to oppose the pot during operation, and a second side opposite the first side;

the coil base is provided with a plurality of supports, the coils are correspondingly arranged on the supports, and the supports are arranged on the second side of the coil base and matched with the second side of the coil base in a concave-convex mode.

Optionally, the bracket is provided with a limiting rib, and a second side of the disk seat is provided with a limiting groove matched with the limiting rib; and/or the presence of a gas in the atmosphere,

the second side of the disk seat is provided with a sunken area for installing the bracket.

Optionally, a plurality of limiting ribs are provided; and/or the presence of a gas in the atmosphere,

the limiting rib extends from the middle of the support to the periphery of the support.

Optionally, the stent comprises:

the first bracket is in concave-convex fit with the second side of the disc seat; and the number of the first and second groups,

the second support is arranged on one side, back to the disc seat, of the first support, and a winding groove for winding and containing the coil is defined between the second support and the first support.

Optionally, the thickness of the first support is less than the thickness of the second support; and/or the presence of a gas in the gas,

the thickness of the first bracket is smaller than that of the disc seat.

Optionally, the disk seat is concave in the middle;

at least part of the coil is arranged at the junction of the bottom and the side of the disk seat;

the at least part of the coils are arranged in a curved shape in the circumferential direction and/or the radial direction of the disk seat so as to be matched with the disk seat.

Optionally, the coil is annular and elongated to form an inner loop and an outer loop, the outer loop of the coil having an aspect ratio smaller than the aspect ratio of the inner loop of the coil.

Optionally, an aspect ratio of an outer ring of the coil is greater than or equal to 2:1, 10 or less: 7; and/or the presence of a gas in the gas,

an aspect ratio of an inner ring of the coil is 3 or more: 1, 6 or less: .

The present invention also provides an electromagnetic heating cooking appliance including a coil disk, the coil disk including:

a tray seat; and the number of the first and second groups,

According to the technical scheme, the plurality of spaced and dispersed coils are arranged on the coil base instead of arranging a whole coil or arranging a plurality of coils of the inner ring and the outer ring, so that the magnetic fields generated by the plurality of coils of the coil panel are dispersed when the coil panel is electrified, and the heating is more uniform.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a diagram illustrating an embodiment of a cooking apparatus according to the present invention;

fig. 2 is an embodiment of a coil panel of the cooking appliance provided in fig. 1;

FIG. 3 is a schematic view of the magnetic field distribution of the coil disk of FIG. 2;

fig. 4 is a schematic view of a first embodiment of a coil panel of the cooking appliance provided in fig. 1;

FIG. 5 is a schematic view of the magnetic field distribution of the coil disk of FIG. 4;

fig. 6 is a schematic view of a second embodiment of a coil disk of the cooking appliance provided in fig. 1;

fig. 7 is a schematic view of a third embodiment of a coil panel of the cooking appliance provided in fig. 1;

FIG. 8 is a schematic view of the magnetic field distribution of the coil disk of FIG. 7;

fig. 9 is a schematic view of a fourth embodiment of a coil disk of the cooking appliance provided in fig. 1;

FIG. 10 is a schematic inverted view of the first holder of FIG. 9;

fig. 11 is an exploded perspective view of a fifth embodiment of a coil panel of the cooking appliance of fig. 1;

fig. 12 is a schematic view of the coil disk of fig. 11 mounted behind a bottom shell of a cooking appliance;

FIG. 13 is a perspective view of FIG. 12;

FIG. 14 is a schematic view of FIG. 11 assembled;

fig. 15 is a schematic view of the coil of fig. 14.

The reference numbers illustrate:

reference numerals	Name(s)	Reference numerals	Name (R)
				100	Electromagnetic heating cooking utensil	2	Coil
101	Coil panel	3	Support frame
				1	Dish seat	31	Spacing rib
11	Limiting groove	3a	First support
				1a	First side	3b	Second support
1b	First side

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The electromagnetic heating cooking appliance 100 is an electric cooker, and the electric cooker comprises a bottom shell, an inner pot and a pot cover, wherein the bottom shell defines a containing cavity with an opening at the upper end, the inner pot is arranged in the containing cavity, the pot cover covers the inner pot to form a cooking cavity together with the inner pot, the coil panel 101 is arranged in the bottom shell, and the coil panel 101 generates a magnetic field when being electrified, so that food materials in the inner pot are heated through the magnetic field. The distribution of the magnetic field of the coil panel 101 directly affects the heating uniformity of the inner pot, i.e. the magnetic field is not distributed uniformly, the heating uniformity is not sufficient, the distribution of the magnetic field is uniform, and the heating uniformity is also good.

As can be seen from the foregoing, in the case of an electric rice cooker, there are 2 common types of coil 2 arrangement forms of the coil panel 101 of the conventional electric rice cooker:

one of the coil 2 arrangements: the coil 2 is integrally arranged in a ring shape, the heating center of the coil is arranged in a ring-shaped distributed area, and a heating blind area exists in the ring-shaped area;

another coil 2 arrangement: the coils 2 are arranged in a plurality of numbers, the coils 2 are arranged in inner and outer rings, correspondingly, strong magnetic field areas and strong heating areas are formed on the inner and outer ring areas, and the problem of insufficient heating uniformity exists.

In order to solve the problem of uneven heating, the invention provides a coil panel 101 and an electromagnetic heating cooking appliance 100 with the coil panel 101, as shown in fig. 1, specifically, in this embodiment, the electromagnetic heating cooking appliance 100 is an electric cooker.

Referring to fig. 2 to 3, the present invention provides a coil panel 101, wherein the coil panel 101 includes a chassis 1 and a plurality of coils 2.

The disc seat 1 may be a flat disc seat 1, or may be a concave disc seat 1, the flat disc seat 1 is substantially flat and generally suitable for an induction cooker, and the concave disc seat 1 is concave in the middle and generally suitable for an electric cooker, a pressure cooker, and the like.

The two sides of the disk seat 1 correspond to a first side 1a and a second side 1b, wherein the first side 1a is a side of the coil disk 101 adjacent to a pot when the disk seat 1 is in operation, and the second side 1b is a side of the disk seat 1 facing away from the pot, generally speaking, for the illustrated coil disk 101, the first side 1a is an upper side, and the second side 1b is a lower side, more specifically, for the first side 1a of the concave disk seat 1, the inner side is an inner side, and the second side 1b is an outer side.

The coils 2 are arranged on the tray 1 at intervals and dispersedly, that is, the coils 2 are arranged separately, rather than in an inner ring and an outer ring, and how to distribute the coils is determined according to specific heating requirements, the coils may be distributed along the circumferential direction of the tray 1, or may be uniformly distributed in each area of the tray 1, which is not limited herein. The shape of the coil 2 is not limited, and may be circular, elliptical, racetrack, or other shapes. The magnetic field strength region of the coil 2 is located at the center thereof without intervention from the outside.

In the technical scheme of the invention, a plurality of spaced and dispersed coils 2 are arranged on the disk seat 1 instead of arranging a whole coil 2 or arranging a plurality of coils 2 of inner and outer rings, so that a plurality of dispersed heating centers are generated when the coils 2 of the coil disk 101 are electrified, and the dispersed heating centers can be distributed in each area according to actual heating requirements, further, the heating is more uniform, and the taste of the cooked food is better.

When the two coils 2 are electrified, when the currents are electrified in the same direction, the directions of the magnetic fields generated by the two coils 2 are the same, so that the magnetic fields of the two coils 2 are mutually repulsive, the magnetic field intensity areas of the two coils 2 are not changed in the central area, when the currents are electrified in the opposite directions, the directions of the magnetic fields generated by the two coils 2 are opposite, so that the magnetic fields of the two coils 2 are mutually attractive, and the magnetic field intensity areas of the two coils 2 are shifted, so that the fixed magnetic field distribution is changed. In the embodiment of the present invention, two or more coils 2 are arranged to be capable of passing current in opposite directions, so that the magnetic fields generated by the two coils 2 are mutually attracted, and normally, the strong magnetic field regions of the magnetic fields generated by the two coils 2 are located at the centers of the two coils, and the strong magnetic field regions are mutually attracted by the magnetic fields generated by the two coils, so that the strong magnetic field regions are shifted to the junction of the two coils, thereby changing the position of the heating center of the coil panel 101.

In some cases, the current direction of each coil 2 may be changed to change the fixed magnetic field distribution (i.e. the distribution of the strong region and the weak region) formed by the plurality of coils 2, or in some cases, the plurality of coils 2 may be independently controlled to control the different coils 2 to be powered on, so as to change the magnetic field distribution area, and the possibility of the magnetic field change may be further increased because the coils 2 with opposite current directions may generate magnetic field offset when powered on.

The structure of "the two coils 2 can be supplied with current in opposite directions" is not limited, and in an embodiment, at least two of the coils 2 are set to be connected in parallel and independently supplied with power, for example, the positive and negative electrodes of the power supplies connected to the two coils are opposite to each other, so that current in opposite directions can be supplied, and the setting is relatively free. In another embodiment of the present invention, the winding directions of the at least two coils 2 are opposite, for this reason, even if the same current is applied, since the winding directions of the coils 2 are opposite, the current directions are also opposite, so that the same power supply mode can be adopted, and the at least two coils 2 can be connected in series.

As can be seen from the above description, the coils 2 may be connected in parallel, connected in series, or connected in series and parallel, and for this reason, the invention is not limited herein, and the invention is specifically based on the actual design requirement. For the parallel connection, the plurality of coils 2 may be independently controlled, and for this reason, the magnitude and direction of the current, etc. may be set to be different, and for the series connection, the magnitude and direction of the current of the plurality of coils 2 may be the same if the winding directions of the coils 2 are the same, and the direction of the current may be opposite if the winding directions of the coils 2 are different.

The coils 2 are provided in plural numbers, and the specific number is not limited, in an embodiment of the present invention, the number of the coils 2 is greater than or equal to three, that is, the number of the coils 2 is three and more than three, specifically, referring to fig. 4 and 5, the number of the coils 2 is three, the three coils 2 are provided at intervals along the circumferential direction of the disk seat 1, among the three coils 2, one coil 2 and the other two coils 2 are provided to be capable of being energized with currents in opposite directions, that is, as shown in fig. 4, the current directions of the upper coil 2 and the lower two coils 2 are opposite, after the three coils 2 are energized, the magnetic field generated by the upper coil 2 and the magnetic field generated by the lower two coils 2 are opposite, furthermore, the coils 2 on the upper side and the two coils 2 on the lower side are attracted to each other so as to form a magnetic field strong region (i.e. a shaded region in the figure) between each other, and the two coils 2 on the lower side form a magnetic field strong region (i.e. a shaded region in the figure) by themselves, so that the coil panel 101 finally forms 4 heating strong regions, please refer to fig. 2 and 3, in this embodiment, the three coils 2 are energized with currents in the same direction, and when energized, the three coils 2 form a magnetic field strong region at the respective centers, so that compared with the embodiment provided in fig. 4 and 5, the uniformity of heating is obviously reduced by one magnetic field strong region (i.e. a shaded region in the figure), which is not as good as the embodiment provided in fig. 4 and 5.

The coils 2 are set to be four or more, referring to fig. 6, the coils 2 are set to be four, the four coils 2 are arranged at intervals along the circumferential direction of the disk seat 1, among the four coils 2, one coil 2 and two adjacent coils 2 are set to be capable of passing current in opposite directions, the opposite coil 2 is set to be capable of passing current in the same direction, and the current directions of the different coils 2 are opposite, so that the whole coil disk 101 can be better coupled, the inductance resistance value of the coupling parameter is larger than that of the same direction, the strength of the generated magnetic field is higher, and the parameters required by the circuit can be more easily reached by using less material (the coils 2) in the opposite current direction.

Referring to fig. 7, in an embodiment of the present invention, the coils 2 are five, the five coils 2 are arranged at intervals along the circumferential direction of the disk seat 1, and in the five coils 2, one of the coils 2 and two adjacent coils 2 are arranged to be capable of passing current in opposite directions, and the opposite coil 2 is arranged to be capable of passing current in the same direction, further referring to fig. 8, finally, the five coils 2 form six magnetic field strength regions (i.e., the regions shaded in the drawing), that is, the number of the magnetic field strength regions can be increased, and the uniformity of heating can be increased.

As can be seen from the above, the first side 1a of the disk seat 1 is the upper side of the disk seat 1, and the second side 1b of the disk seat 1 is the lower side of the disk seat 1, further, in the embodiment of the present invention, the disk seat 1 is a concave disk seat 1, the first side 1a of the disk seat 1 is the inner side of the disk seat 1, and the second side 1b of the disk seat 1 is the outer side of the disk seat 1.

Install a plurality of supports 3 on the coil panel 101 seat, a plurality of coils 2 correspond install in a plurality of supports 3, support 3 locates the second side 1b of disk seat 1, support 3 with set up concave-convex structure between the second side 1b of disk seat 1, so that disk seat 1 with unsmooth cooperation between the second side 1b of disk seat 1, promptly support 3 at least partial gomphosis install in the second side 1b of disk seat 1 and then can reduce disk seat 1 with the gross thickness of support 3, and then can reduce install coil 2 on the support 3 with the distance between the first side 1a of disk seat 1, and the first side 1a of disk seat 1 is promptly relative with the pan, and then, can reduce coil 2 with the distance between the pan, and because support 3 with the second side 1b of disk seat 1 adopts unsmooth cooperation to form the gomphosis structure, can increase the intensity of support 3.

The specific working distance between the coil 2 and the cooker is a constant value, for example, when the coil 2 and the heating surface of the cooker are both a plane, or the coil 2 and the inner cooker are both in a uniform offset state, or a variable value, because the outer surface of the cooker and the surface of the coil 2 are in a non-offset state, no matter the working distance is a constant value or a variable value, in order to obtain a better heating effect, the working distance is 4-8 mm, i.e. greater than or equal to 4mm, less than or equal to 8mm, because the upper side of the general coil panel 101 is also provided with a panel, the thickness of the panel is required, and therefore, the bracket 3 and the second side 1b of the coil base 1 are set to be in a concave-convex matching structure, which can further facilitate maintaining the working distance between 4 and 8 mm.

In the embodiment of the present invention, a concave portion is disposed on one side of the bracket 3 facing the disk seat 1, and a convex portion is disposed on the other side of the bracket 3 facing the disk seat 1, so as to achieve concave-convex fitting, and one side of the bracket 3 facing the disk seat 1 is fitted with the concave portion, so as to achieve concave-convex fitting, or one side of the bracket 3 facing the disk seat 1 is disposed with a limiting rib 31, and the second side 1b of the disk seat 1 is disposed with a limiting groove 11 engaged with the limiting rib 31, so that the bracket 3 is inserted into the limiting groove 11 of the disk seat 1 through the limiting rib 31, so as to achieve a closer working distance between the pot and the coil 2, so that a magnetic field coupled to the pot is larger, so that energy lost during operation of a product is lower, so as to improve energy efficiency of the product, and the coil 31 is inserted into the pot, so as to achieve a stable deformation of the bracket 3 due to heat of the coil 3, so that the coil is not deformed stably when the coil is inserted into the bracket 11, and the coil 3 is not deformed, so that the coil 3 is not deformed, and the coil 3 is not deformed stably inserted into the coil 11, so that the coil 11, and the coil 31, and the coil is not deformed, so that the coil 3 is not deformed, and the coil is not deformed, so that the coil is not deformed, the situation that the heating difference is large with other coils 2 occurs when food is heated, so that the food cooking effect is influenced, and the taste of user experience is influenced. In some embodiments of the present invention, the area of the second side 1b of the disk seat 1 where the bracket 3 is installed is recessed, so that the whole of the bracket 3 is embedded in the second side 1b of the disk seat 1, so as to reduce the working distance.

Further, referring to fig. 9 to 10, in an embodiment of the present invention, the bracket 3 is provided with a plurality of limiting ribs 31, correspondingly, the limiting grooves 11 of the second side 1b of the disk seat 1 are also provided with a plurality of limiting grooves 11, and the limiting ribs 31 are correspondingly matched with the limiting grooves 11, so as to further enhance the engaging strength between the bracket 3 and the second side 1b of the disk seat 1. The position and shape of the limiting rib 31 are not limited, and specifically, in the embodiment of the present invention, the limiting rib 31 extends from the middle of the bracket 3 to the periphery of the bracket 3.

The specific structure and shape of the bracket 3 are not limited, and the specific structure of the bracket 3 is mainly used as an installation carrier of the coil 2, and the specific structure of the bracket 3 is related to the forming manner of the coil 2, for example, the bracket 3 may be an installation seat, the coil 2 is installed in the installation seat, or may be a winding post, the coil 2 is wound on the winding post, in this embodiment, the coil 2 is directly wound on the bracket 3, for this reason, referring to fig. 9 to 10, the bracket 3 includes a first bracket 3a and a second bracket 3b, the first bracket 3a forms one side of the bracket 3 facing the disk seat 1, and the first bracket 3a and the second side 1b of the disk seat 1 are in concave-convex fit, and the second bracket 3b is installed on one side of the first bracket 3a facing away from the disk seat 1, and defines a groove for winding and accommodating the coil 2 with the first bracket 3a, so that the winding of the coil 2 is convenient. The plurality of first brackets 3a may be connected as a whole, may be arranged separately, or may be partially connected as a whole, and the other first brackets 3a are arranged separately, and how to arrange may be determined according to actual needs, and in this embodiment, the plurality of second brackets 3b are arranged separately, and the plurality of second brackets 3b may be connected as a whole, may be arranged separately, or may be partially connected as a whole, and how to arrange the other second brackets 3b separately may be determined according to actual needs.

The first support 3a is arranged between the seat 1 and the coil 2, for which reason the thickness of the first support 3a directly has an influence on the aforementioned working distance, for which reason in an embodiment of the invention the thickness of the first support 3a is smaller than the thickness of the second support 3b, in order to further reduce the working distance. Also, in the embodiment of the present invention, the thickness of the first bracket 3a is smaller than that of the disk seat 1, which is also advantageous for reducing the working distance.

Referring to fig. 11 to 15, in the embodiment of the present invention, the disk seat 1 is recessed in the middle, that is, the disk seat 1 is a concave disk seat 1. The coil 2 is arranged on the outer side surface of the disk seat 1, and at least a part of the coil 2 is arranged on the bending area of the outer side surface of the disk seat 1, for this reason, in order to adapt to the shape of the disk seat 1, the corresponding at least part of the coil 2 is correspondingly arranged in a bending shape, so that the distance between each area of the coil 2 and the second side 1b of the disk seat 1 is equivalent, namely, the distance between each area of the coil 2 and the cooker is basically kept at an equivalent level. And in particular in the embodiment of the invention, the coil 2 is mounted on the second side 1b of the seat 1 by means of a support 3, so the shape of the support 3 is also adapted to the shape of the seat 1, also provided with a curved shape. Further, the bracket 3 includes the first bracket 3a and the second bracket 3b, and for this reason, the first bracket 3a and the second bracket 3b are each provided in a curved shape.

Specifically, in the embodiment of the present invention, at least a part of the coils 2 is disposed at the intersection of the bottom and the side of the seat 1, that is, all the coils 2 may be located at the intersection of the bottom and the side of the seat 1, or a part of the coils 2 may be located at the intersection of the bottom and the side of the seat 1. Since the junction between the bottom and the side of the seat 1 is curved in both the circumferential direction and the radial direction of the seat 1, in the embodiment of the present invention, the at least part of the coil 2 is curved in both the circumferential direction and the radial direction of the seat 1 to be adapted to the seat 1, but may be curved only in one of the circumferential direction and the radial direction of the seat 1, and the effect is not good as curved in both directions. Accordingly, in the embodiment of the present invention, the coil 2 is mounted on the second side 1b of the disk seat 1 through the bracket 3, so that the bracket 3 is disposed in a curved shape in the circumferential direction and/or the radial direction of the disk seat 1. Further, the bracket 3 includes the first bracket 3a and the second bracket 3b, and for this purpose, the first bracket 3a and the second bracket 3b are disposed in a curved shape in a circumferential direction and/or a radial direction of the disk seat 1.

Referring to fig. 14 to 15, in an embodiment of the present invention, the coil 2 is annular, and the coil 2 is non-circular and is arranged in a long shape, which may be elliptical, elliptical-like, or racetrack shape, the coil 2 is formed with an inner ring and an outer ring, the aspect ratio of the outer ring of the coil 2 is smaller than the aspect ratio of the inner ring of the coil 2, for this reason, the coil 2 is divided into four regions, two corresponding long regions and two short regions, because the aspect ratio of the outer ring of the coil 2 is smaller than the aspect ratio of the inner ring of the coil 2, the width of the short region of the coil 2 is narrowed, and the long region is wider, so that the density of the coil 2 in the short region is greater, and the magnetic field strength is greater, and the width of the coil 2 in the long region is wider, so that the projection area of the long region on the pot is greater, and the area of the magnetic field distribution is greater.

Specifically, in the present embodiment, the aspect ratio (A2: B2) of the outer ring of the coil 2 is in the range of 2: between 7, i.e. greater than or equal to 2:1 and 10 or less: 7, the aspect ratio of the outer loop of the coil 2 cannot be too small, the length of the long side area of the coil 2 is small, and it cannot be too large, and if it is too large, the width of the short side area of the coil 2 is insufficient.

In the present embodiment, the aspect ratio (A1: B1) of the inner ring of the coil 2 is between 3 and 1 and 6, specifically, 6 or less: 1 and 3 or more: 1, the aspect ratio of the inner loop of the coil 2 cannot be too small, the width of the inner loop of the coil 2 too small is too large, and the width of the inner loop of the coil 2 too large is not sufficient.

It should be noted here that the coil 2 may be curved or flat, and for the curved shape, the aspect ratio of the outer ring and the inner ring of the coil 2 is the aspect ratio of the outer ring and the inner ring corresponding to the projection of the coil 2 on the projection plane, where the projection plane is a plane perpendicular to the center line of the coil 2, and then the projection of the coil 2 on the projection plane.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.

Claims

1. A coil disc, comprising:

a tray seat; and (c) a second step of,

2. Coil disc according to claim 1, characterized in that at least two of the coils are arranged to be able to be supplied with current in opposite directions.

3. Coil disc according to claim 2, characterized in that at least two of the coils are arranged in parallel and independently supplied with current to enable passage of current in opposite directions; or,

the plurality of coils are arranged in series.

4. The coil disk as claimed in claim 2, wherein said coils are provided in at least three, said three coils being provided at intervals along a circumferential direction of said disk holder, and among said three coils, one of said coils and the other two of said coils are provided so as to be able to pass electric currents in opposite directions; or,

the coils are at least four, the four coils are arranged at intervals along the circumferential direction of the disk seat, and in the four coils, one coil and two adjacent coils are arranged to be capable of being electrified with currents in opposite directions, and the opposite coil is arranged to be capable of being electrified with currents in the same direction.

5. The coil disc as claimed in claim 1, wherein said disc holder has a first side to be opposed to a pot in operation, and a second side opposite to said first side;

a plurality of supports are installed on the second side of the coil disc, a plurality of coils are correspondingly installed on the plurality of supports, and the supports are in concave-convex fit with the second side of the disc seat.

6. The coil disk as claimed in claim 5, wherein said bracket is provided with a limiting rib, and a second side of said disk seat is provided with a limiting groove engaged with said limiting rib; and/or the presence of a gas in the atmosphere,

7. The coil disk as claimed in claim 6, wherein said spacing rib is provided in plurality; and/or the presence of a gas in the atmosphere,

the limiting ribs extend from the middle of the support to the periphery of the support.

8. Coil disk according to any of claims 5 to 7, characterized in that the holder comprises:

the first support is in concave-convex fit with the second side of the disc seat; and (c) a second step of,

the second support is installed on one side, back to the disc seat, of the first support, and a winding groove for accommodating the coil in a winding mode is defined between the second support and the first support.

9. Coil disk according to claim 8, characterized in that the thickness of the first support is smaller than the thickness of the second support and/or the disk holder.

10. The coil disk as claimed in claim 1, wherein said disk seat is recessed in a central portion thereof;

11. The coil disk as claimed in claim 1, wherein the coil is annularly and longitudinally arranged to form an inner loop and an outer loop, the outer loop of the coil having an aspect ratio smaller than the aspect ratio of the inner loop of the coil.

12. The coil disk as claimed in claim 11, wherein an aspect ratio of an outer ring of said coil is 2:1, 10 or less: 7; and/or the presence of a gas in the atmosphere,

an aspect ratio of an inner ring of the coil is 3 or more: 1, 6 or less: 1.

13. an electromagnetic heating cooking appliance comprising a coil disk according to any one of claims 1 to 12.