CN207354654U - Electromagnetic oven and coil panel - Google Patents

Abstract

The utility model provides an electromagnetism stove and coil panel. The induction cooker comprises a coil panel, the coil panel comprises a support and coil windings located on the support, the coil windings comprise a first annular coil winding and at least three second annular coil windings, the first annular coil winding is arranged in the central area of the support, and the at least three second annular coil windings are arranged on the support and surround the first annular coil winding. The utility model provides an electromagnetic oven is through setting up a plurality of toroidal coil windings for the distribution of magnetic line of force is more dispersed, makes the heating of electromagnetic oven more even.

Description

Electromagnetic oven and coil panel

Technical field

It the utility model is related to household electrical appliance technical field, more particularly to a kind of electromagnetic oven and coil panel.

Background technology

Electromagnetic oven has the advantages that fast firing rate, the flames of anger, smoke dust, safe ready, is increasingly subject to consumer's Favor and accreditation.

Coil panel is the important component of electromagnetic oven, and coil panel generally includes：Coil brace and around being located at the coil branch Coil windings on frame.The magnetic field of alternation is produced by coil windings, so that forming vortex flow in the bottom of cookware makes cookware bottom Portion generates heat, and realizes electromagnetic heating.One circular winding method of existing coil windings generally use multiple turn, multiple layer.

However, the heater coil disc of single circular winding method, the center of coil panel is equally each circle coiling Center, makes the magnetic field Relatively centralized of the central area of coil panel, vortex flow, the heat of the central area generation of corresponding heating cookware Bigger is measured, causes cookware bottom-heated uneven.

Utility model content

At least one in order to solve the problems, such as to mention in background technology, the utility model provides a kind of electromagnetic oven and coil Disk, by setting multiple loop coil windings, has disperseed the distribution of the magnetic line of force so that the heating of electromagnetic oven is more uniform.

To achieve these goals, the utility model provides a kind of electromagnetic oven, including coil panel, and the coil panel includes branch Frame and the coil windings on the stent, the coil windings include first annular coil windings and at least three second Loop coil winding, the first annular coil windings are arranged on the central area of the stent, at least three second ring Shape coil windings are set around the first annular coil windings on the bracket.

Electromagnetic oven as described above, by setting multiple loop coil windings, when using electromagnetic oven heating, each annular Coil windings can form field region and provide heating region, form multiple heated centers of multicenter point so that whole line The magnetic line of force on circle disk will not all concentrate on the center of coil panel.Since multiple heated centers are respectively distributed in coil panel Heart district domain and outer peripheral areas, so that the distribution of the magnetic line of force is more scattered so that the heating of electromagnetic oven is more uniform.

In an embodiment of the utility model, coil in the first annular coil windings and described at least three the Coil in second ring coil windings is serially connected and two lead terminals are drawn at head and the tail both ends respectively.

In an embodiment of the utility model, described two lead terminals be separately positioned on the first annular coil around On a second loop coil winding in group and at least three second loop coil winding.

In an embodiment of the utility model, the coil in the first annular coil windings is serially connected and head and the tail two Two wire connection terminals are drawn respectively in end；Coil at least three second loop coil winding is serially connected and head and the tail both ends Two lead terminals are drawn respectively.

In an embodiment of the utility model, the coil in the first annular coil windings is serially connected and head and the tail two Two wire connection terminals are drawn respectively in end；At least three second loop coil winding, which is respectively divided to different coil groups, to be formed At least two coil groups, each coil group include at least one second loop coil winding, and at least one in each coil group Coil on a second loop coil winding is serially connected and two lead terminals are drawn at head and the tail both ends respectively.

In an embodiment of the utility model, if the number of the second loop coil winding is even number, with the branch Two the second loop coil windings of the central symmetry distribution of frame belong to a coil group.

In above-described embodiment of the utility model, be provided with the stent the first winding slot and at least three second around Wire casing, the number of second winding slot are identical with the number of the second loop coil winding；First winding slot is set The central area of the stent and with the form fit of the first annular coil windings, for the first annular coil around Group coiling；At least three second winding slot around first winding slot set and with least three second toroid The shape Corresponding matching of winding is enclosed, at least three second loop coil winding technique.

In an embodiment of the utility model, the number of turns of first winding slot is more than or equal to second coiling The number of turns of groove.

In above-described embodiment of the utility model, the bottom of the stent is provided with magnetic stripe, and the magnetic stripe is with the branch The center of frame is radially distributed for the center of circle.

In an embodiment of the utility model, the magnetic stripe includes multiple first magnetic stripes and multiple second magnetic stripes, described The length of first magnetic stripe is more than the length of second magnetic stripe, and multiple first magnetic stripes and multiple second magnetic stripes are along institute The bottom surface for stating stent is circumferentially spaced apart successively.

In above-described embodiment of the utility model, the shape of at least three second loop coil winding is identical.

The utility model also provides a kind of coil panel, including stent and the coil windings on the stent, described Coil windings include first annular coil windings and at least three second loop coil windings, and the first annular coil windings are set Put and surround first ring on the bracket in the central area of the stent, at least three second loop coil winding Shape coil windings are set.

The construction of the utility model and its other purpose of utility model and beneficial effect will be in conjunction with the accompanying drawings Description of preferred embodiments and it is more obvious understandable.

Brief description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property Under, other attached drawings can also be obtained according to these attached drawings.

Fig. 1 is the Structure explosion diagram for the electromagnetic oven coil disk that the utility model embodiment provides；

Fig. 2 is the top view for the electromagnetic oven coil disk that the utility model embodiment provides；

Fig. 3 is the structure diagram for the electromagnetic oven coil winding that the utility model embodiment provides；

Fig. 4 is the structure diagram of the field region for the electromagnetic oven that the utility model embodiment provides.

Description of reference numerals：

10：Coil panel； 11：Stent；

12：Coil windings； 13：First winding slot；

14：Second winding slot； 15：Wire connection terminal；

16：Magnetic stripe； 121：First annular coil windings；

122：Second loop coil winding；123~127：Loop coil winding；

133~137：Field region； 161：First magnetic stripe；

162：Second magnetic stripe.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, those of ordinary skill in the art's all other embodiments obtained without making creative work, belongs to The scope of the utility model protection.

Electromagnetic oven and coil panel provided by the utility model, it is intended to solve single circular winding in currently available technology The heater coil disc of mode causes the non-uniform technical problem of cookware bottom-heated.

Fig. 1 is the Structure explosion diagram for the electromagnetic oven coil disk that the utility model embodiment provides, and Fig. 2 is the utility model Embodiment provide electromagnetic oven coil disk top view, Fig. 3 be the utility model embodiment provide electromagnetic oven coil around The structure diagram of group, Fig. 4 are the structure diagram of the field region for the electromagnetic oven that the utility model embodiment provides.Such as Fig. 1 Shown in~Fig. 4, electromagnetic oven provided in this embodiment, can include：Housing (not shown), panel (not shown) and coil panel 10. Panel is located at the top of housing, and coil panel 10 can be located in the cavity that housing and panel surround.Panel can be glass panel, Can also be ceramic panel, the material of the utility model counter plate is not construed as limiting.

Coil panel 10 can include stent 11 and the coil windings 12 on stent 11.Wherein, coil windings 12 can To be set including first annular 121 and at least three second loop coil winding 122 of coil windings, first annular coil windings 121 Put in the central area of stent 11, at least three second loop coil windings 122 on stent 11 around first annular coil around Group 121 is set.

Electromagnetic oven provided in this embodiment, in structure, coil panel 10 includes multiple loop coil windings.Wherein, set Loop coil winding in the central area of the stent 11 of coil panel 10 is properly termed as first annular coil windings 121, is arranged on At least three loop coil windings of the outer peripheral areas of stent 11 are properly termed as the second loop coil winding 122.At least three Second ring coil windings 122 are set around first annular coil windings 121, by around the periphery of first annular coil windings 121 Region division is at least three regions, and each second loop coil winding 122 is arranged in a region.The present embodiment is for The quantity of second ring coil windings 122 does not limit, and can be any positive integer more than or equal to 3, carry out as needed Set.In order to lift Regional Distribution's reasonability of coil panel 10, the quantity of the second loop coil winding 122 can be 3-6.

Electromagnetic oven provided in this embodiment, when being cooked using electromagnetic oven, cookware is placed on panel, to electromagnetism Stove is powered, and has the electric current of high frequency at this time by the coil on coil panel 10, so as to produce the magnetic field force of countless closings, works as magnetic field Magnetic force line cutting cookware, countless small vortex are produced in the bottom surface of cookware, so as to be heated to cookware.Wherein, positioned at stent The first annular coil windings 121 of 11 central area form a field region when heated, there is provided a heating region. At least three second loop coil windings 122 positioned at the outer peripheral areas of stent 11 form a field regions respectively when heated Domain, each provides a heating region.Exemplary, refer to Fig. 3 and Fig. 4.As shown in figure 3, first annular coil windings It can mark for winding 123, or labeled as loop coil winding one.The quantity of second loop coil winding is 4 It is a, loop coil 124~loop coil of winding winding 127 can be labeled as successively according to clockwise direction, or can be marked For loop coil two~loop coil of winding winding five.As shown in figure 4, loop coil winding 123 can be in coil when being powered Disk 10 is centrally formed field region 133, or labeled as field region one.Loop coil winding 124~loop coil winding 127 can form four field regions when being powered in the outer peripheral areas of coil panel 10, and it is field regions that can distinguish correspondence markings Domain 134~137, or labeled as two~field region of field region five.

As it can be seen that electromagnetic oven provided in this embodiment, by setting multiple loop coil windings, is utilizing electromagnetic oven heating When, each loop coil winding can form field region and provide heating region, form multiple heated centers of multicenter point. A heated center is only formed compared to existing single circular ring shape winding method, electromagnetic oven provided in this embodiment, avoids The magnetic line of force of coil panel concentrates on the center of coil panel.By forming the magnetic line of force on the whole coil panel of multiple heated centers The center of coil panel will not all be concentrated on.Due to multiple heated centers be respectively distributed to coil panel central area and Outer peripheral areas, so that the distribution of the magnetic line of force is more scattered so that the heating of electromagnetic oven is more uniform.

It should be noted that shape of the present embodiment for first annular 121 and second loop coil winding 122 of coil windings Shape and implementation do not limit, and are configured as needed.For example, first annular 121 and second loop coil of coil windings Winding 122 is circle.Alternatively, first annular coil windings 121 can be circle, the second loop coil winding 122 can be Ellipse.First annular 121 and second loop coil winding 122 of coil windings can be formed by enameled wire coiling.This implementation Example is not limited for the number of turns of first annular coil windings 121 and the number of turns of the second loop coil winding 122.For example, first The number of turns of loop coil winding 121 can be that 3-8 is enclosed, and the number of turns of the second loop coil winding 122 can be that 2-5 is enclosed.

Wherein, in order to lift the distributing homogeneity of heating region, the shape of at least three second loop coil windings 122 can With identical.

Wherein, in order to lift the distributing homogeneity of heating region, at least three second loop coil windings 122 can surround First annular coil windings 121 are set at equal intervals.

Wherein, in order to lift the heating effect of central area, the number of turns of the coil of first annular coil windings 121 can be big In or equal to the second loop coil winding 122 coil the number of turns.

Wherein, in one implementation, the coil in first annular coil windings 121 and at least three second toroids Coil on circle winding 122 is serially connected and two lead terminals 15 are drawn at head and the tail both ends respectively.

Specifically, each coil series connection on first annular 121 and at least three second loop coil winding 122 of coil windings Connection.First annular 121 and at least three second loop coil winding 122 of coil windings only has altogether two lead terminals 15, The two lead terminals 15 can be connected with the control panel of electromagnetic oven.By setting two lead terminals so that first annular line It is identical with the electric current on each second loop coil winding center line circle therefore further when realizing multicenter heating region to enclose winding The uniformity of electromagnetic oven heating is improved, simplifies computer heating control mode.

It should be noted that the present embodiment is for each on first annular 121 and second loop coil winding 122 of coil windings The series system of coil and the setting position of lead terminal 15 do not limit.For example, it can be formed by an enameled wire coiling. A piece enameled wire is wound on central area and the outer peripheral areas of stent 11 successively, forms first annular coil windings 121 and at least Lead terminal 15 is drawn at three the second loop coil windings 122, the head and the tail both ends of enameled wire respectively.Wherein, two lead terminals 15 can be separately positioned in first annular coil windings 121 and at least three second loop coil windings 122 in one the In second ring coil windings 122.

Wherein, in another implementation, the coil in first annular coil windings 121 is serially connected and head and the tail both ends Two lead terminals 15 are drawn respectively.Coil at least three second loop coil windings 122 is serially connected and head and the tail both ends Two lead terminals 15 are drawn respectively.

Specifically, each coil in first annular coil windings 121 is connected in series, first annular coil windings 121 are set There are two lead terminals 15, the two lead terminals 15 can be connected with the control panel of electromagnetic oven.At least three second toroids Each coil on circle winding 122 is connected in series, and at least three second loop coil windings 122 only have altogether two lead terminals 15, the two lead terminals 15 can be connected with the control panel of electromagnetic oven.In this way, for first annular coil windings 121 and right Different computer heating control modes can be used at least three second loop coil windings 122, i.e., for 10 center of coil panel The computer heating control in domain and computer heating control for 10 outer peripheral areas of coil panel can control respectively so that the computer heating control of electromagnetic oven Mode is more flexible, realizes different heating effects.

Wherein, in another implementation, the coil in first annular coil windings 121 is serially connected and head and the tail both ends Two lead terminals 15 are drawn respectively.At least three second loop coil windings 122 are respectively divided to different coil groups and are formed At least two coil groups, each coil group include at least one second loop coil winding 122, in each coil group at least Coil on one the second loop coil winding 122 is serially connected and two lead terminals 15 are drawn at head and the tail both ends respectively.

Specifically, each coil in first annular coil windings 121 is connected in series, first annular coil windings 121 are set There are two lead terminals 15, the two lead terminals 15 can be connected with the control panel of electromagnetic oven.At least three second toroids Circle is around at least two coil groups of formation.For each coil group, including at least one second loop coil winding 122.Often Each coil on each second loop coil winding 122 in a coil group is connected in series, and each coil group is provided with two leads Terminal 15, the two lead terminals 15 can be connected with the control panel of electromagnetic oven.In this way, for first annular coil windings 121, At least two coil groups formed at least three second loop coil windings 122 can use different computer heating control sides Formula, i.e., computer heating control for 10 central area of coil panel, the computer heating control for 10 outer peripheral areas of coil panel can be controlled respectively System so that the computer heating control mode of electromagnetic oven is more flexible, realizes different heating effects.

Optionally, if the number of the second loop coil winding 122 is even number, with two of the central symmetry distribution of stent 11 Second loop coil winding 122 belongs to a coil group.Exemplary, refer to Fig. 3 and Fig. 4.As shown in figure 3, loop coil Winding 124 and loop coil winding 126, or referred to as loop coil winding two and loop coil winding four, can form one Coil group.Loop coil winding 125 and loop coil winding 127, or referred to as loop coil winding three and loop coil winding Five, another coil group can be formed.In this way, loop coil 123~loop coil of winding winding 127 can use three kinds not altogether Same computer heating control mode, so as to meet different culinary art demands.For example, loop coil winding 123, loop coil winding 124 Can alternately it be heated with loop coil winding 126, loop coil winding 125 and loop coil winding 127, so that electromagnetic oven Heating it is more uniform.

Wherein, the first winding slot 13 and at least three second winding slots 14, the second winding slot can be provided with stent 11 14 number is identical with the number of the second loop coil winding 122.

First winding slot 13 be arranged on the central area of stent 11 and with the form fit of first annular coil windings 121, For first annular 121 coiling of coil windings.

At least three second winding slots 14 set around the first winding slot 13 and with least three second loop coil windings 122 shape Corresponding matching, at least three second loop coil windings, 122 coiling.

, can be by enameled wire along winding slot winding, you can in the stent of coil panel 10 specifically, by setting winding slot First annular 121 and second loop coil winding 122 of coil windings is formed on 11, makes the coiling of coil more conveniently and quickly. It is of course also possible to first make first annular 121 and second loop coil winding 122 of coil windings, then pass through silicone adhesive The correspondence position being bonded on the stent 11 of coil panel 10.

It should be noted that the present embodiment is not limited for the shape of the first winding slot 13 and the second winding slot 14, only Will be with the form fit of first annular 121 and second loop coil winding 122 of coil windings.For example, winding slot can be Annular or spiral shape.If first annular coil windings 121 are circle, the first winding slot 13 is circle.If the second toroid Winding 122 is enclosed as ellipse, then the second winding slot 14 is ellipse.The present embodiment is for the first winding slot 13 and the second winding slot 14 number of turns does not limit.For example, the number of turns of the first winding slot 13 is more than or equal to the number of turns of the second winding slot 14.

Wherein, can be set on the often circle winding slot on the first winding slot 13 and/or the second winding slot 14 for connecting phase The wire jumper notch (not shown) of adjacent winding slot.

Specifically, by setting wire jumper notch on every circle winding slot, can be after the completion of each turn coil coiling from jump Line indentation, there is worn into adjacent winding slot, i.e. wire jumper notch skips to adjacent winding slot for coil-winding from a winding slot Critical point.

In the present embodiment, all wire jumper notches in the first winding slot 13 can be located at straight line on, i.e. first around The jumper location of the coil-winding of each circle is identical in wire casing 13.All wire jumper notches in each second winding slot 14 can position In on straight line, i.e. the jumper location of the coil-winding of each circle is identical in each second winding slot 14.In this way, it can make It is more convenient to obtain making and the coiling of coil panel 10, makes the trend of coil-winding more neat.

Wherein, in order to be guided to the magnetic line of force, the magnetic line of force is made to concentrate on the top of coil panel 10, stent 11 as far as possible Bottom can be provided with magnetic stripe 16, magnetic stripe 16 is radially distributed using the center of stent 11 as the center of circle.

Specifically, being guided by magnetic stripe to the magnetic line of force, the magnetic line of force is concentrated on as far as possible above coil panel, improve The efficiency of heating surface.

Wherein, magnetic stripe 16 can include multiple first magnetic stripes 161 and multiple second magnetic stripes 162, the length of the first magnetic stripe 161 More than the length of the second magnetic stripe 162, and the bottom surface of multiple first magnetic stripes 161 and multiple second magnetic stripes 162 along stent 11 it is circumferential according to Minor tick is distributed.

Specifically, magnetic stripe 16 includes the first magnetic stripe 161 and the second magnetic stripe 162, the first magnetic stripe 161 can be long magnetic stripe, the Two magnetic stripes 162 can be short magnetic stripe, and the first magnetic stripe 161 and the second magnetic stripe 162 are circumferential along the bottom surface of the stent 11 of coil panel 10 It is intervally arranged successively.It is understood that second magnetic stripe 162 is set between two the first magnetic stripes 161.By by the first magnetic 161 and second magnetic stripe 162 of bar is arranged to different length, so as in interior carry out magnetic conduction in a big way, make magnetic conduction effect more It is good.

A kind of electromagnetic oven, including coil panel are present embodiments provided, coil panel can include stent and positioned at branch Coil windings on frame.Wherein, coil windings can include first annular coil windings and at least three second loop coils around Group, first annular coil windings are arranged on the central area of stent, and at least three second loop coil windings surround on stent First annular coil windings are set.Electromagnetic oven provided in this embodiment, by setting multiple loop coil windings, is utilizing electromagnetism During stove heat, each loop coil winding can form field region and provide heating region, form the multiple of multicenter point and add Thermal center (-tre) so that the distribution of the magnetic line of force is more scattered so that more uniform using the heating of electromagnetic oven.

The utility model embodiment also provides a kind of coil panel, can be applied in the household electrical appliance of electromagnetic heating.Such as Electromagnetic oven, electromagnetic heating electric rice cooker, electromagnetic heating pressure cooker etc..Coil panel provided in this embodiment, can include stent and Coil windings on stent, coil windings include first annular coil windings and at least three second loop coil windings, First annular coil windings are arranged on the central area of stent, and at least three second loop coil windings surround first on stent Loop coil winding is set.

Coil panel provided in this embodiment, its technical principle and technique effect may refer to Fig. 1~embodiment illustrated in fig. 4, Details are not described herein again.

One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to The relevant hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey Sequence upon execution, execution the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or Person's CD etc. is various can be with the medium of store program codes.

Term " first ", " second ", " the 3rd " in the description and claims of this application and above-mentioned attached drawing, " The (if present)s such as four " are for distinguishing similar object, without for describing specific object, order or precedence. It should be appreciated that the data so used can exchange in the appropriate case.

Finally it should be noted that：Various embodiments above only illustrating the technical solution of the utility model embodiment, rather than It is limited；Although the utility model embodiment is described in detail with reference to foregoing embodiments, this area it is common Technical staff should be understood：It can still modify the technical solution described in foregoing embodiments, or to wherein Some or all of technical characteristic carries out equivalent substitution；And these are changed or are replaced, the essence of appropriate technical solution is not made Depart from the scope of the utility model embodiment technical solution.

Claims (12)

1. a kind of electromagnetic oven, including coil panel (10), the coil panel (10) includes stent (11) and positioned at the stent (11) coil windings (12) on, it is characterised in that the coil windings (12) are including first annular coil windings (121) and extremely Few three the second loop coil windings (122), the first annular coil windings (121) are arranged on the center of the stent (11) Region, at least three second loop coil winding (122) on the stent (11) around the first annular coil around Group (121) is set.

2. electromagnetic oven according to claim 1, it is characterised in that the coil on the first annular coil windings (121) It is serially connected with the coil at least three second loop coil winding (122) and two leads is drawn at head and the tail both ends respectively Terminal (15).

3. electromagnetic oven according to claim 2, it is characterised in that described two lead terminals (15) are separately positioned on described Second toroid on first annular coil windings (121) and at least three second loop coil winding (122) Enclose on winding (122).

4. electromagnetic oven according to claim 1, it is characterised in that the coil on the first annular coil windings (121) It is serially connected and two lead terminals (15) is drawn at head and the tail both ends respectively；

Coil at least three second loop coil winding (122) is serially connected and head and the tail both ends are drawn two and drawn respectively Line terminals (15).

5. electromagnetic oven according to claim 1, it is characterised in that the coil on the first annular coil windings (121) It is serially connected and two lead terminals (15) is drawn at head and the tail both ends respectively；

At least three second loop coil winding (122) is respectively divided to different coil groups and forms at least two coils Group, each coil group include at least one second loop coil winding (122), at least one second ring in each coil group Coil in shape coil windings (122) is serially connected and two lead terminals (15) are drawn at head and the tail both ends respectively.

6. electromagnetic oven according to claim 5, it is characterised in that if the number of the second loop coil winding (122) For even number, belong to a coil group with two the second loop coil windings (122) that the central symmetry of the stent (11) is distributed.

7. electromagnetic oven according to any one of claims 1 to 6, it is characterised in that be provided with first on the stent (11) Winding slot (13) and at least three second winding slots (14), number and second loop coil of second winding slot (14) The number of winding (122) is identical；

First winding slot (13) be arranged on the central area of the stent (11) and with the first annular coil windings (121) form fit, for first annular coil windings (121) coiling；

At least three second winding slot (14) sets around first winding slot (13) and with described at least three second The shape Corresponding matching of loop coil winding (122), at least three second loop coil winding (122) coiling.

8. electromagnetic oven according to claim 7, it is characterised in that the number of turns of first winding slot (13) is more than or waits In the number of turns of second winding slot (14).

9. electromagnetic oven according to any one of claims 1 to 6, it is characterised in that the bottom of the stent (11) is provided with Magnetic stripe (16), the magnetic stripe (16) are radially distributed using the center of the stent (11) as the center of circle.

10. electromagnetic oven according to claim 9, it is characterised in that the magnetic stripe (16) includes multiple first magnetic stripes (161) With multiple second magnetic stripes (162), the length of first magnetic stripe (161) is more than the length of second magnetic stripe (162), and multiple First magnetic stripe (161) and multiple second magnetic stripes (162) are circumferentially spaced apart successively along the bottom surface of the stent (11).

11. electromagnetic oven according to any one of claims 1 to 6, it is characterised in that at least three second loop coil The shape of winding (122) is identical.

A kind of 12. coil panel (10), it is characterised in that the coil windings including stent (11) and on the stent (11) (12), the coil windings (12) include first annular coil windings (121) and at least three second loop coil windings (122), the first annular coil windings (121) are arranged on the central area of the stent (11), and described at least three second Loop coil winding (122) is set on the stent (11) around the first annular coil windings (121).