CN116782445A

CN116782445A - Electromagnetic induction device capable of uniformly heating and winding method thereof

Info

Publication number: CN116782445A
Application number: CN202310749776.2A
Authority: CN
Inventors: 莫永贤
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-09-19

Abstract

The invention relates to the technical field of electromagnetic heating equipment, in particular to an electromagnetic induction device for uniform heating and a winding method thereof, comprising a wire coil, wherein the wire coil is provided with coils and magnetic strips, the magnetic strips are distributed in a radial manner, and the upper end face of each magnetic strip is higher than the upper end face of each coil; a plurality of blocking ribs are arranged on the wire coil, and a winding groove is formed between two radially adjacent blocking ribs; the wire coil is sequentially provided with a wire coil inner ring, a wire coil middle ring and a wire coil outer ring from inside to outside, the coil is arranged in a non-uniform winding mode, the coil comprises an inner magnetic induction area, a middle magnetic induction area and an outer magnetic induction area, the winding density of the inner magnetic induction area is greater than or equal to that of the middle magnetic induction area, and the winding density of the outer magnetic induction area is greater than or equal to that of the middle magnetic induction area. According to the invention, the coil can be split into a plurality of different density intervals, and the bottom of the cooker can be heated more uniformly relative to a single heating wave peak through the heating wave peaks formed between the different density intervals.

Description

Electromagnetic induction device capable of uniformly heating and winding method thereof

Technical Field

The invention relates to the technical field of electromagnetic heating equipment, in particular to an electromagnetic induction device for uniform heating and a winding method thereof.

Background

The electromagnetic induction heating can enable the heating body to directly generate heat, and the heat is not required to be transmitted to the heating body through an intermediate heat conducting medium, so that the energy utilization rate is effectively improved. The heating part of the electromagnetic heating equipment in the prior art consists of a wire coil and a cooker support panel, wherein the wire coil can generate an alternating magnetic field when passing through high-frequency alternating current, when a cooker containing a magnetic conduction material on the cooker support panel senses the magnetic field, the magnetic conduction material forms strong vortex under the action of the changing magnetic field to generate heat, and then a large amount of heat energy is converted according to the requirement by specific control so as to heat the cooker.

In the prior art, the wire coil is made into a spiral shape in a uniform winding mode, when the wire coil passes through high-frequency current, the magnetic force is strongest at a position between one third and two thirds away from the center of the wire coil due to uneven distribution of magnetic field intensity, heating wave peaks can be formed, the heating wave peaks are respectively decreased inwards and outwards, and the generated magnetic field intensity is weaker at the center of the wire coil and the outer ring; because the magnetic field intensity at the center of the coil is weaker, the temperature at the center of the corresponding cooker is lower, and the temperature at the position of the heating peak is different by about 120 degrees, so that temperature measurement deviation is brought, the cooker is unevenly heated, the central area of the cooker is lower than the temperature at the edge area of the central area of the cooker, so that a heating blind area is formed, the cooker is in a narrow-band annular shape when the load of the cooker is heated, and the cooking effect is poor due to the fact that the temperature difference inside the cooker is larger, for example, the phenomenon of partially burning the cooker at the narrow-band annular position of the cooker occurs.

When the magnetic force lines are concentrated on the lower side of the wire coil, the temperature of the element can be greatly increased due to self heating of the element, so that the electrical element is easy to damage and malfunction under the high temperature condition.

Aiming at the defects of the wire coil, the wire coil needs to be improved to improve the performance of the product and the use experience of users.

Disclosure of Invention

Aiming at the technical problems that the prior wire coil is heated unevenly and magnetic leakage exists in the working process, magnetic force lines are concentrated at the lower side of the wire coil, the temperature of the element is greatly increased due to self heating, and the electrical element is easy to damage, the invention adopts the technical scheme that:

an electromagnetic induction device capable of uniformly heating comprises a wire coil, wherein a coil and magnetic strips are arranged on the wire coil, the magnetic strips are distributed in a radial manner, and the upper end face of each magnetic strip is higher than the upper end face of each coil;

a plurality of blocking ribs are arranged on the wire coil, and a wire winding groove is formed between two radially adjacent blocking ribs;

the wire coil is sequentially provided with a wire coil inner ring, a wire coil middle ring and a wire coil outer ring from inside to outside, the coil is arranged in a non-uniform winding mode, the coil comprises an inner magnetic induction area, a middle magnetic induction area and an outer magnetic induction area, the winding density of the inner magnetic induction area is greater than or equal to that of the middle magnetic induction area, and the winding density of the outer magnetic induction area is greater than or equal to that of the middle magnetic induction area.

In some embodiments of the present invention, in order to improve the coiling effect of the wire coil, the ribs are arranged at intervals from the inner side of the wire coil to the outer side of the wire coil, the winding grooves are arranged at intervals in concentric circles, and a winding gap is arranged between two adjacent winding grooves.

In some embodiments of the present invention, in order to improve heating uniformity, the coil is provided with jumper areas, and each jumper area includes a jumper outlet end and a jumper inlet end, which sequentially penetrate from the winding gap and are used for winding, and a phase difference between the jumper inlet end and the jumper outlet end corresponding to the jumper inlet end is at least one winding groove.

In some embodiments of the present invention, in order to improve the magnetic focusing effect, the coil is provided with one coil and is arranged on the wire coil in a coiled shape, the magnetic strip comprises a first magnetic strip and a second magnetic strip, and the coil is located between the first magnetic strip and the second magnetic strip;

the first magnetic stripe is provided with a first magnetic stripe first side wall and a first magnetic stripe second side wall which are respectively arranged oppositely, and a first magnetic stripe body which is positioned between the first magnetic stripe first side wall and the first magnetic stripe second side wall, and the second magnetic stripe is provided with a second magnetic stripe first side wall and a second magnetic stripe body;

The first magnetic stripe first side wall is positioned on the inner side of the wire coil, and the first magnetic stripe second side wall and the second magnetic stripe first side wall are positioned on the outer side of the wire coil;

the upper end faces of the first side wall of the first magnetic stripe, the second side wall of the first magnetic stripe and the first side wall of the second magnetic stripe are flush and higher than the upper end face of the coil.

In some embodiments of the present invention, in order to improve stability of the magnetic stripe, a first magnetic stripe groove for accommodating the first magnetic stripe body and a second magnetic stripe groove for accommodating the second magnetic stripe body are provided on the back surface of the wire coil.

In some embodiments of the present invention, to improve connection stability between the magnetic stripe and the wire coil, the first magnetic stripe groove extends from the wire coil inner ring to the wire coil outer ring, and the second magnetic stripe groove extends from the wire coil middle ring to the wire coil outer ring.

In some embodiments of the present invention, in order to improve connection stability between the magnetic stripe and the wire coil, the wire coil inner ring is provided with a wire coil inner ring opening for extending the first magnetic stripe first side wall, the wire coil outer ring is provided with a wire coil outer ring first opening for extending the first magnetic stripe second side wall, and a wire coil outer ring second opening for extending the second magnetic stripe first side wall, the wire coil inner ring opening and the wire coil outer ring first opening are respectively communicated with the first magnetic stripe groove, and the wire coil outer ring second opening is communicated with the second magnetic stripe groove.

In some embodiments of the present invention, in order to better collect the magnetic field at the bottom of the pan, the first magnetic stripe and the second magnetic stripe are provided with a plurality of first magnetic stripes, and the second opening of the wire coil outer ring is located at the arc midpoint of the first openings of two adjacent wire coil outer rings.

In some embodiments of the present invention, in order to improve the coiling effect of the wire coil, the ribs are uniformly disposed on the middle coil, the first magnetic stripe groove, the second magnetic stripe groove, and face to one side of the coil.

A winding method as described above, comprising the steps of:

s1, starting to coil an inserted wire from the innermost ring of the inner coil along the winding groove in a unidirectional and continuous mode to form an inner magnetic induction area, wherein the inner magnetic induction area is at least provided with a jumper wire area, and the jumper wire inlet end in the inner magnetic induction area is different from the jumper wire outlet end corresponding to the jumper wire inlet end by at least one winding groove;

s2, a wire is coiled in a unidirectional continuous mode along the winding groove by the wire coil middle ring to form a middle magnetic induction area, the middle magnetic induction area is at least provided with two jumper wire areas, and the jumper wire inlet end of the middle magnetic induction area is different from the jumper wire outlet end corresponding to the jumper wire inlet end by at least one circle of winding groove;

S3, the wire is coiled in a unidirectional and continuous mode along the winding groove by the wire coil outer ring to form an outer magnetic induction area, at least one jumper wire area is arranged in the outer magnetic induction area, and the jumper wire inlet end of the outer magnetic induction area is different from the jumper wire outlet end corresponding to the jumper wire inlet end by at least one circle of winding groove; the lead is coiled until the last circle extends out, and the coil manufacturing is completed.

The beneficial effects of the invention are as follows:

1. according to the invention, the coil can be split into a plurality of different density intervals by the different winding densities of the inner magnetic induction area and the middle magnetic induction area, or the winding densities of the outer magnetic induction area and the middle magnetic induction area, or the winding densities of the inner magnetic induction area and the outer magnetic induction area are different from the winding densities of the middle magnetic induction area, and the heating wave crest formed between the different density intervals can enable the bottom of the pot to be heated more uniformly relative to a single heating wave crest.

2. According to the invention, the leaked magnetic field is upwards transferred by utilizing the magnetic strips in the wire coil, so that the magnetic field is more concentrated at the bottom of the cooker, and the cooker heats more fully and uniformly, thereby improving the heating efficiency of the device, avoiding the electric elements from heating and being easily damaged due to the fact that magnetic lines of force are concentrated at the lower side of the wire coil by reducing the magnetic leakage of the device, and improving the performance of products and the use experience of users.

Drawings

Fig. 1 is a schematic diagram of an electromagnetic induction apparatus for uniform heating according to the present invention.

Fig. 2 is a schematic back view of an electromagnetic induction apparatus with uniform heating according to the present invention.

Fig. 3 is an exploded view of an electromagnetic induction apparatus for uniform heating according to the present invention.

Fig. 4 is an exploded view of an electromagnetic induction apparatus for uniform heating according to the present invention.

Fig. 5 is a top view of an electromagnetic induction apparatus for uniform heating according to the present invention.

Fig. 6 is a schematic view of section A-A of fig. 5, partially enlarged.

Fig. 7 is an enlarged view of a jumper region of the magnetic induction region inside the B portion of fig. 5.

Fig. 8 is an enlarged view of a jumper region of the magnetic induction region in the portion C of fig. 5.

Fig. 9 is an enlarged view of a jumper region of the magnetic induction region outside the portion D of fig. 5.

Fig. 10 is a prior art thermal imager effect picture and thermal profile thereof.

Fig. 11 is a thermal imager effect picture and thermal distribution diagram of example 3.

Fig. 12 is a thermal imager effect picture and thermal distribution diagram of example 4.

Fig. 13 is a thermal imager effect picture and thermal distribution diagram of example 5.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The electromagnetic induction device capable of uniformly heating as shown in fig. 1 to 9 comprises a wire coil 1, wherein a coil 2 and a magnetic strip 3 are arranged on the wire coil 1, the magnetic strips 3 are distributed in a radial manner, and the upper end face of the magnetic strip 3 is higher than the upper end face of the coil 2;

A plurality of blocking ribs 4 are arranged on the wire coil 1, and a wire winding groove 5 is formed between two radially adjacent blocking ribs 4;

the wire coil 1 is sequentially provided with a wire coil inner ring 11, a wire coil middle ring 12 and a wire coil outer ring 13 from inside to outside, the coil 2 is arranged in a non-uniform winding mode, the coil 2 comprises an inner magnetic induction area 21, a middle magnetic induction area 22 and an outer magnetic induction area 23, the winding density of the inner magnetic induction area 21 is greater than or equal to that of the middle magnetic induction area 22, and the winding density of the outer magnetic induction area 23 is greater than or equal to that of the middle magnetic induction area 22.

Specifically, the inner magnetic induction area is positioned between one third of the coil center and the inner coil, the middle magnetic induction area is positioned between one third of the coil and the inner coil, and the outer magnetic induction area is positioned between two thirds of the coil and the outer coil.

According to the invention, the coil can be split into a plurality of different density intervals by the different winding densities of the inner magnetic induction area and the middle magnetic induction area, or the winding densities of the outer magnetic induction area and the middle magnetic induction area, or the winding densities of the inner magnetic induction area and the outer magnetic induction area are different from the winding densities of the middle magnetic induction area, and the heating wave crest formed between the different density intervals can enable the bottom of the pot to be heated more uniformly relative to a single heating wave crest.

According to the invention, the leaked magnetic field is upwards transferred by utilizing the magnetic strip on the wire coil, so that the magnetic field is more concentrated at the bottom of the cooker, and the cooker heats more fully and uniformly, thereby improving the heating efficiency of the device, avoiding the electric elements from heating and being easily damaged due to the fact that magnetic lines of force are concentrated at the lower side of the wire coil by reducing the magnetic leakage of the device, and improving the performance of products and the use experience of users.

Further, as a preferred embodiment of the present invention, but not limited thereto, the existing pot load is in a narrow-band ring shape when heated, and local stress is excessively concentrated at the narrow-band ring-shaped position of the pot, so that the pot is easily deformed and damaged during long-term use. According to the invention, the leaked magnetic field is upwards transferred, so that the magnetic field is more dispersed at the bottom of the cooker, the cooker heats more fully and uniformly, the phenomenon that the cooker has local stress too concentrated is avoided, and the service life of the cooker is further prolonged.

Alternatively, in some embodiments, the coil may be made of a conductive material such as, but not limited to, copper, aluminum, and the like.

In the prior art, the wire is generally wound into the electromagnetic induction coil by using the jig and fixed by using glue to form a wire cake, and then the wire cake is fixed on the wire coil by using the glue. The glue fixing mode is long in time for drying glue, so that the assembly efficiency of the close-wound wire reel is reduced.

As a further improvement, in this embodiment, specifically, a wire inlet 24 is disposed at a position of the wire coil near the center thereof for one end of the coil to extend into, and the coil is wound in a unidirectional winding manner by one or more wires, so as to form a multi-turn winding by winding the wire coil from the inside to the outside in a clockwise or counterclockwise single direction. The winding groove is used for fixing the coil through clamping, so that the coil is prevented from being loosely shifted in the running process, the process of using glue to bond can be reduced, and the coil is prevented from being tilted due to fixing failure.

In the prior art, the wire coil is manufactured in a uniform winding mode, the magnetic force is strongest at a position between one third and two thirds away from the center of the wire coil, heating wave peaks can be formed, the heating wave peaks respectively decrease inwards and outwards, and the generated magnetic field intensity is weaker at the center of the wire coil and the outer ring magnetic field intensity.

In this embodiment, the winding density through inboard magnetic induction district and well magnetic induction district is different, or outside magnetic induction district and well magnetic induction district's winding density are different, or inboard magnetic induction district and outside magnetic induction district are different with the winding density of well magnetic induction district simultaneously, can split into a plurality of different density intervals with the coil, the heating crest that forms between the different density interval, for single heating crest, this embodiment can make the pan bottom be heated more evenly through a plurality of heating crest.

Meanwhile, as the first magnetic stripe groove and the second magnetic stripe groove are additionally arranged, the heat dissipation area of the coil is reduced, and the gap of the middle magnetic induction area is further increased by reducing the winding density of the middle magnetic induction area, so that the heat dissipation performance of the device is improved.

In the prior art, the wire coil is wound by adopting a multi-turn coil, the coil can be wound in a uniformly-distributed mode, the coil staggering condition exists when the inner coil of the coil is wound to the outer coil, and the coil staggering is influenced by tooling tension and the like, so that the condition that the insulation layer on the outer surface of the coil is scratched and thinned and even falls off is more easily caused, and the coil jumper area is possibly abnormal in temperature rise, short circuit ignition and the like, so that the serious quality problem of products exists.

The invention reduces the number of windings of the coil, increases the gap of the medium magnetic induction area, increases the heat radiation performance, reduces the scratch thinning of the insulating layer on the outer surface of the coil, and further reduces the possibility of abnormal temperature rise, short circuit ignition and the like in the jumper area of the coil.

As shown in fig. 1 to 6, in an electromagnetic induction device for uniform heating, the ribs 4 are arranged at intervals from the inner side of the wire coil 1 to the outer side of the wire coil 1, the winding grooves 5 are arranged at intervals in concentric circles, and winding gaps 41 are arranged between two adjacent winding grooves 5.

Specifically, keep off the muscle and be equipped with a plurality ofly, keep off the muscle and set up by drum inboard side drum outside interval, a plurality of keep off the muscle that equals from the coil center enclose and close and form concentric circle, keep off and form the wire winding groove between radial adjacent two concentric circles that the muscle formed, the wire winding groove is concentric circle interval setting.

Specifically, the winding gap is located between two adjacent winding slots disposed in the winding direction.

Further, in order to improve the fixing effect of the wire winding groove, the coil is more attached to the wire winding groove, and the two radially adjacent blocking ribs are not staggered and opposite, and the arc length of the blocking ribs is consistent with that of the wire winding groove.

As shown in fig. 1 to 9, in an electromagnetic induction device with uniform heating, the coil 2 is provided with jumper areas 8, each jumper area 8 includes a jumper wire outlet end 81 and a jumper wire inlet end 82 which sequentially penetrate from and through the winding gap 41 and are used for winding, and a phase difference between the jumper wire inlet end 82 and the corresponding jumper wire outlet end 81 is at least one winding slot 5. Further, as a preferred embodiment of the present invention, but not limited thereto, the jumper region enables different gaps to appear in the inner magnetic induction region, the middle magnetic induction region and the outer magnetic induction region, so that the heat dissipation performance of the coil can be further improved, and meanwhile, the total length of the coil winding can be reduced, and the cost is saved.

Further, as a preferred embodiment of the present invention, but not limited to, the jumper region may be disposed at an inner magnetic induction region, a middle magnetic induction region, and an outer magnetic induction region, and may be disposed at a junction between a terminal winding of the inner magnetic induction region and a head winding of the middle magnetic induction region, or may be disposed at a junction between a terminal winding of the middle magnetic induction region and a head winding of the outer magnetic induction region.

As shown in fig. 1 to 6, the coil 2 is provided with one electromagnetic induction device which is coiled on the wire coil 1, the magnetic strip 3 comprises a first magnetic strip 31 and a second magnetic strip 32, and the coil 2 is positioned between the first magnetic strip 31 and the second magnetic strip 32;

the first magnetic stripe 31 is provided with a first magnetic stripe first side wall 311 and a first magnetic stripe second side wall 312 which are respectively and oppositely arranged, and a first magnetic stripe body 313 which is positioned between the first magnetic stripe first side wall 311 and the first magnetic stripe second side wall 312, and the second magnetic stripe 32 is provided with a second magnetic stripe first side wall 321 and a second magnetic stripe body 322;

the first magnetic stripe first side wall 311 is located at the inner side of the wire coil 1, and the first magnetic stripe second side wall 312 and the second magnetic stripe first side wall 321 are located at the outer side of the wire coil 1;

The upper end surfaces of the first magnetic stripe first side wall 311, the first magnetic stripe second side wall 312 and the second magnetic stripe first side wall 321 are flush and higher than the upper end surface of the coil 2.

According to the invention, the first side wall of the first magnetic stripe, the second side wall of the first magnetic stripe and the first side wall of the second magnetic stripe are arranged, the leaked magnetic field is upwards transferred by utilizing the magnetic stripe on the wire coil, so that the magnetic field is more concentrated at the bottom of the cooker, and the cooker heats more fully and uniformly, thereby improving the heating efficiency of the device, avoiding the electric appliance element from self-heating and being easy to damage due to the fact that the magnetic force lines are concentrated at the lower side of the wire coil by reducing the magnetic leakage of the device, and improving the performance of the product and the use experience of users.

Further, in this embodiment, the magnetic strips arranged on the wire coil play a role in magnetic conduction and magnetic concentration, and the first magnetic strip and the second magnetic strip guide magnetic lines of force to the pot, so that heating of the bottom of the pot is achieved.

The drum is mostly disc-shaped among the prior art, and first magnetic stripe is radial setting all around by its center on the drum, and first magnetic stripe is comparatively intensive in line drum central point department, in this embodiment, add the second magnetic stripe that is radial arrangement in being close to periphery department of drum again, can avoid being close to periphery department magnetic line of force of drum and sparsely arouse the inconsistent that magnetic conduction gathered the magnetism effect, and the second magnetic stripe makes the magnetic line of drum be close to periphery department magnetic line of force line drum center, further solves the inhomogeneous problem of heating.

As shown in fig. 4, a first magnetic stripe groove 6 for accommodating the first magnetic stripe body 313 and a second magnetic stripe groove 7 for accommodating the second magnetic stripe body 322 are provided on the back of the wire coil 1. Optionally, in some embodiments, the first magnetic stripe body may be disposed in the first magnetic stripe groove by means of a welding or glue connection, and the second magnetic stripe body may be disposed in the second magnetic stripe groove by means of a welding or glue connection.

Preferably, in some embodiments, for ease of installation cooperation, the first magnetic stripe body and the second magnetic stripe body are provided in a straight configuration, and the first magnetic stripe groove and the second magnetic stripe groove are respectively matched with the shapes of the first magnetic stripe body and the second magnetic stripe body.

Optionally, in some embodiments, the first magnetic stripe body and the second magnetic stripe body are each integrally formed.

Alternatively, in some other embodiments, the first magnetic stripe body and the second magnetic stripe body are each split-type combined to form a linear structure.

As shown in fig. 1 to 6, the first magnetic stripe groove 6 extends from the inner coil 11 to the outer coil 13, and the second magnetic stripe groove 7 extends from the middle coil 12 to the outer coil 13. Specifically, the first magnetic stripe and the second magnetic stripe can gather magnetic lines of force towards the center direction of the wire coil, so that outward diffusion of the magnetic lines of force is reduced, the radiation value of outward radiation of the wire coil is reduced, reverse heating can be weakened, and the damage of the electric appliance element caused by temperature rise due to self-heating of the electric appliance element when the magnetic lines of force are concentrated on the lower side of the wire coil is avoided, and stable operation of the induction cooker is ensured.

As shown in fig. 3 to 4, in an electromagnetic induction device for uniform heating, the inner coil 11 is provided with an inner coil opening 111 through which the first magnetic stripe first sidewall 311 extends, the outer coil 13 is provided with an outer coil first opening 131 through which the first magnetic stripe second sidewall 312 extends, and an outer coil second opening 132 through which the second magnetic stripe first sidewall 321 extends, the inner coil opening 111 and the outer coil first opening 131 are respectively communicated with the first magnetic stripe groove 6, and the outer coil second opening 132 is communicated with the second magnetic stripe groove 7. Optionally, in this embodiment, in order to conveniently install first magnetic stripe, first magnetic stripe adopts integrated into one piece's mode and is the U type, first magnetic stripe first side wall is located one side of first magnetic stripe body, first magnetic stripe second side wall is located the opposite side of first magnetic stripe body, when first magnetic stripe is installed in first magnetic stripe groove, first magnetic stripe first side wall aligns drum inner circle opening, first magnetic stripe second side wall aligns drum outer lane first opening, first magnetic stripe body is close to first magnetic stripe groove direction, when first magnetic stripe body laminating holding is in first magnetic stripe groove, first magnetic stripe first side wall stretches out to drum inner circle open-ended upside, first magnetic stripe second side wall stretches out to drum outer circle first open-ended upside, first magnetic stripe first side wall and the upper end of first magnetic stripe second side wall all are higher than the up end of coil this moment.

Further, the first magnetic stripe may be formed into a U-shape by two L-shaped splices.

Optionally, in this embodiment, in order to install the second magnetic stripe conveniently, the mode of integrated into one piece is just being the L type to the second magnetic stripe, the first side wall of second magnetic stripe is located one side of second magnetic stripe body, when the second magnetic stripe is installed in the second magnetic stripe groove, the first side wall of second magnetic stripe is aimed at drum outer lane second opening, the second magnetic stripe body is close to second magnetic stripe groove direction, when second magnetic stripe body laminating holding is in the second magnetic stripe groove, the first side wall of second magnetic stripe stretches out to drum outer lane second open-ended upside, the upper end of the first side wall of second magnetic stripe is higher than the up end of coil this moment.

Optionally, in some embodiments, the upper end faces are the first magnetic stripe first side wall, the first magnetic stripe second side wall and the second magnetic stripe first side wall with the same height, so that magnetic force lines are gathered uniformly towards the center direction of the wire coil, local uneven magnetic force lines are reduced to diffuse outwards, and the peak values of the heating wave peaks are located on the same plane.

Optionally, in some embodiments, the first magnetic stripe first sidewall is the same shape and size as the first magnetic stripe second sidewall, which can reduce manufacturing process and facilitate installation.

Optionally, in some embodiments, the shape and size of the electromagnetic heating device may be further used to make the extending heights of the first side wall of the first magnetic stripe and the upper end of the second side wall of the first magnetic stripe and the extending height of the upper end of the first side wall of the second magnetic stripe close to the support panel of the pot, so as to further improve the magnetic conduction and magnetism gathering effect of the magnetic stripe.

Optionally, in some embodiments, the bottom of the wire coil, the first magnetic stripe groove, and the second magnetic stripe groove are of a flat design.

As shown in fig. 1 to 6, in an electromagnetic induction device for uniform heating, the first magnetic stripe 31 and the second magnetic stripe 32 are provided with a plurality of second openings 132 of the wire coil outer ring are located at the middle points of the arcs of the first openings 131 of the adjacent two wire coil outer rings. In this embodiment, the first magnetic stripe groove and the second magnetic stripe groove are all provided with a plurality of, and a plurality of first magnetic stripe grooves are axisymmetric setting or centrosymmetric setting, and a plurality of second magnetic stripe grooves are axisymmetric setting or centrosymmetric setting. The second openings of the wire coil outer rings are positioned at the arc midpoints of the first openings of the adjacent two wire coil outer rings, so that the second magnetic stripe grooves are positioned at the arc midpoints of the adjacent two first magnetic stripe grooves, and the magnetic lines of force are uniformly gathered towards the center direction of the wire coil by uniformly distributing the second magnetic stripe grooves, thereby reducing the local uneven diffusion of the magnetic lines of force.

As shown in fig. 1 to 6, the ribs 4 are uniformly arranged on the coil 12, the first magnetic stripe groove 6 and the second magnetic stripe groove 7 and face to one side of the coil 2. Optionally, in some embodiments, the rib is the arc setting, and the wire winding groove that forms between two adjacent ribs is a plurality of diameter difference concentric circles and evenly lays, thereby the wire winding groove fully supports the coil and maintains its planarization and avoid the coil part to sag, can avoid the coil different positions to the distance of electromagnetism stove pan support panel surface different. The coil flatness and the magnetic force lines of the coil move upwards uniformly, so that the induction cooker is heated more uniformly.

A winding method as described above as shown in fig. 1 to 9, comprising the steps of:

s1, starting to coil the inserted wire in a unidirectional and continuous manner along the winding grooves 5 from the innermost ring of the wire coil inner ring 11 to form an inner magnetic induction area 21, wherein the inner magnetic induction area 21 is at least provided with one jumper wire area 8, and the jumper wire inlet end 82 in the inner magnetic induction area 21 is different from the jumper wire outlet end 81 corresponding to the jumper wire inlet end by at least one winding groove 5;

s2, a wire is coiled in a unidirectional and continuous mode along the winding grooves 5 by the wire coil middle ring 12 to form a middle magnetic induction area 22, the middle magnetic induction area 22 is at least provided with two jumper wire areas 8, and the jumper wire inlet ends 82 of the middle magnetic induction area 22 are different from the jumper wire outlet ends 81 corresponding to the jumper wire inlet ends by at least one winding groove 5;

S3, the wire is coiled continuously along the winding groove 5 in a unidirectional manner by the wire coil outer ring 13 to form an outer magnetic induction area 23, at least one jumper wire area 8 is arranged in the outer magnetic induction area 23, and the jumper wire inlet end 82 of the outer magnetic induction area 23 is different from the jumper wire outlet end 81 corresponding to the jumper wire inlet end by at least one winding groove 5; the lead is coiled until the last circle extends out, and the coil 2 is manufactured.

As shown in fig. 5 and 6, in particular, the wire of the coil is extended from the wire inlet 24, the coil 2 is wound in a unidirectional manner, and a single wire is wound from the inside to the outside of the coil 1 in a counterclockwise direction to form a multi-turn coil.

The wire coil inner ring 11 has 7 wire winding grooves, the wire coil middle ring 12 has 7 wire winding grooves, and the wire coil outer ring 13 has 7 wire winding grooves.

As shown in fig. 5 and 6, after the coil 2 is wound on the coil inner ring 11 to a third turn, the coil 2 moves to the coil inner ring third winding groove a, the coil 2 extends from the coil inner ring third winding groove a to the winding gap 41, the coil 2 continues to be wound in the anticlockwise direction to the coil inner ring fifth winding groove B, at this time, the jumper wire area 8 of the inner magnetic induction area 21 is formed, the jumper wire outlet end 81 is located in the coil inner ring third winding groove a, the jumper wire inlet end 82 is located in the coil inner ring fifth winding groove B, and the coil inner ring third winding groove a and the coil inner ring fifth winding groove B differ by one winding groove 5.

After the coil 2 is wound on the coil inner ring 11 to the sixth circle, the coil 2 moves to the coil inner ring sixth circle winding groove A, the coil 2 extends out of the coil inner ring sixth circle winding groove A to the winding gap 41, the coil 2 continues to be wound in the coil middle circle winding groove B in the anticlockwise direction, the jumper wire area 8 of the middle magnetic induction area 22 is formed at this time, the jumper wire outlet end 81 is located the coil inner ring sixth circle winding groove A, the jumper wire inlet end 82 is located the coil middle circle second circle winding groove B, and the coil inner ring sixth circle winding groove A and the coil middle circle second circle winding groove B are different by two circles of winding grooves 5, namely the coil inner ring seventh circle winding groove and the coil middle circle first circle winding groove.

At this time, there are 1 jumper area in the inner coil 11 and one jumper area between the inner coil 11 and the middle coil 12.

After the coil 2 is wound to the second coil in the coil 12, the coil 2 moves to the second coil winding groove A in the coil, the coil 2 extends out of the second coil winding groove A in the coil to the winding gap 41, the coil 2 continues to be wound in the fourth coil winding groove B in the coil in the anticlockwise direction, the jumper wire area 8 of the middle magnetic induction area 22 is formed at the moment, the jumper wire outlet end 81 is positioned in the second coil winding groove A in the coil, the jumper wire inlet end 82 is positioned in the fourth coil winding groove B in the coil, and the difference between the second coil winding groove A in the coil and the fourth coil winding groove B in the coil is one coil winding groove 5.

After the coil 2 is wound to the fourth coil from the coil middle coil 12, the coil 2 moves to the coil middle coil fourth coil winding groove A, the coil 2 extends out of the coil middle coil fourth coil winding groove A to the winding gap 41, the coil 2 continues to be wound in the coil middle coil sixth coil winding groove B in the anticlockwise direction, the jumper wire area 8 of the middle magnetic induction area 22 is formed at the moment, the jumper wire outlet end 81 is located the coil middle coil fourth coil winding groove A, the jumper wire inlet end 82 is located the coil middle coil sixth coil winding groove B, and the coil middle coil fourth coil winding groove A and the coil middle coil sixth coil winding groove B are different by one coil winding groove 5.

At this time, two jumper areas and one jumper area between the inner coil 11 and the middle coil 12 are shared in the middle coil 12.

The coil 2 is wound to the seventh coil in the coil middle coil 12 and then enters the outer coil 13, the coil 2 moves to the seventh coil winding groove A in the coil, the coil 2 extends out of the seventh coil winding groove A in the coil to the winding gap 41, the coil 2 continues to be wound to the second coil winding groove B in the coil outer coil in the anticlockwise direction, the jumper wire area 8 of the outer magnetic induction area 23 is formed at the moment, the jumper wire outlet end 81 is positioned in the seventh coil winding groove A in the coil, the jumper wire inlet end 82 is positioned in the second coil winding groove B in the coil outer coil, and the difference between the seventh coil winding groove A in the coil and the second coil winding groove B in the coil outer coil is one coil winding groove 5.

After the coil 2 is wound to the second coil on the coil outer ring 13, the coil 2 moves to the second coil winding groove A of the coil outer ring, the coil 2 extends out of the second coil winding groove A of the coil outer ring to the winding gap 41, the coil 2 continues to be wound to the fourth coil winding groove B of the coil outer ring in the anticlockwise direction, the jumper wire area 8 of the outer magnetic induction area 23 is formed at the moment, the jumper wire outlet end 81 is positioned in the second coil winding groove A of the coil outer ring, the jumper wire inlet end 82 is positioned in the fourth coil winding groove B of the coil outer ring, and the second coil winding groove A of the coil outer ring and the fourth coil winding groove B of the coil outer ring differ by one coil winding groove 5.

At this time, there are two jumper areas in the wire coil outer ring 13.

The wire is coiled to the sixth circle of the outer ring of the wire coil to extend out, and the coil 2 is manufactured.

At this time, the winding density of the inner magnetic induction area is greater than that of the middle magnetic induction area, and the winding density of the outer magnetic induction area is greater than that of the middle magnetic induction area.

Specifically, in the same winding groove, the wire can be wound for one circle, two circles, three circles or more than four circles according to the depth of the winding groove. Alternatively, in this embodiment, the wire is selectively wound one or two turns.

As can be seen from fig. 6, the jumper area of the inner magnetic induction area splits the inner magnetic induction area into two groups of coils, the jumper area of the middle magnetic induction area splits the inner magnetic induction area into three groups of coils, and the jumper area of the outer magnetic induction area splits the outer magnetic induction area into two groups of coils. In the winding grooves 5 between the plurality of consecutive winding coils 2, at least one set of two-turn wound winding grooves and one set of one-turn wound winding grooves are provided.

The first to third turns of the inner coil 11, the fifth to sixth turns of the inner coil 11, the sixth to seventh turns of the middle coil 12, and the fourth to sixth turns of the outer coil 13 are all described.

Specifically, the winding slot a and the winding slot B that differ by at least one turn in this embodiment are two winding slots with the smallest included angle therebetween in the counterclockwise direction. The distance from the winding slot a to the center of the wire coil is smaller than the distance from the winding slot B, which differs by at least one turn, to the center of the wire coil.

In this embodiment, the included angle between the winding slot a in the inner coil 11 and the winding slot B which is different by at least one turn is 60 degrees, and the included angle between the winding slot a in the first turn and the winding slot B which is different by at least one turn in the coil is 60 degrees.

The included angle between the winding grooves a of the second to seventh turns and the winding groove B of the at least one turn in the wire coil is 30 degrees, and the included angle between the winding groove a of the outer coil ring 13 and the winding groove B of the at least one turn in the wire coil is 30 degrees.

In some embodiments, the angle between the winding slot a and the winding slot B that is different by at least one turn is not limited to 30 degrees, 60 degrees. Can be adjusted according to the distribution density of the blocking ribs.

Alternatively, in some embodiments, the winding may be performed by jumping from the winding slot a to the winding slot B with at least one turn, and the user jumping from the winding slot B to the winding slot C with at least one turn.

Optionally, in some embodiments, the winding may be performed by jumping from the winding slot a to the winding slot B with at least one turn, and the user jumping to the winding slot E with at least one turn after the winding slot B continues to wind to the winding slot D in the concentric circle.

In the embodiment, the number of windings and the number of layers are regulated through winding of one wire, the superposition of a coil magnetic field is controlled, magnetic conduction is utilized, heating wave peaks formed between different density intervals are utilized, and the bottom of the cooker can be heated more uniformly relative to a single heating wave peak.

The invention uses a multi-area jumper wire method to carry out unidirectional winding through one strand of wire, and the continuous winding of the invention can lead the production and the manufacture to be more coherent, does not need to adopt a plurality of groups of coils for setting, and further saves the materials and the cost.

As shown in fig. 1 to 9, the embodiment of example 1 is as follows:

the electromagnetic induction device comprises a wire coil 1, wherein a coil 2 and a magnetic strip 3 are arranged on the wire coil 1, the magnetic strip 3 is radially distributed, the magnetic strip 3 comprises a first magnetic strip 31 and a second magnetic strip 32, and the wire coil 1 is provided with one coil and is arranged between the first magnetic strip 31 and the second magnetic strip 32 in a coiling mode;

the first magnetic strips 31 and the second magnetic strips 32 are provided in plurality, and each second magnetic strip 32 is arranged between two adjacent first magnetic strips 31;

The first magnetic stripe 31 is provided with a first magnetic stripe first side wall 311 and a first magnetic stripe second side wall 312 which are respectively arranged oppositely, a first magnetic stripe body 313 which is positioned between the first magnetic stripe first side wall 311 and the first magnetic stripe second side wall 312, and the second magnetic stripe 32 is provided with a second magnetic stripe first side wall 321 and a second magnetic stripe body 322;

the first magnetic stripe first side wall 311 is positioned on the inner side of the wire coil 1, and the first magnetic stripe second side wall 312 and the second magnetic stripe first side wall 321 are positioned on the outer side of the wire coil 1;

the upper end surfaces of the first magnetic stripe first side wall 311, the first magnetic stripe second side wall 312 and the second magnetic stripe first side wall 321 are flush and are higher than the upper end surface of the coil 2. The shape and the size of the first magnetic stripe first side wall 311 are the same as those of the first magnetic stripe second side wall 312, so that the production process can be reduced, and the installation is convenient.

The wire coil 1 is sequentially provided with a wire coil inner ring 11, a wire coil middle ring 12 and a wire coil outer ring 13 from inside to outside, the first magnetic stripe groove 6 extends from the wire coil inner ring 11 to the wire coil outer ring 13, and the second magnetic stripe groove 7 extends from the wire coil middle ring 12 to the wire coil outer ring 13.

The first magnetic stripe groove 6 and the second magnetic stripe groove 7 are respectively provided with a plurality of first magnetic stripe grooves 6 which are axisymmetrically arranged, and a plurality of second magnetic stripe grooves 7 which are axisymmetrically arranged. The second openings 132 of the wire coil outer ring are positioned at the arc midpoints of the first openings 131 of the adjacent two wire coil outer rings, so that the second magnetic stripe grooves 7 are positioned at the arc midpoints of the adjacent two first magnetic stripe grooves 6, and the magnetic lines of force are gathered towards the center direction of the wire coil 1 uniformly in a mode that the second magnetic stripe grooves 7 are distributed uniformly, so that the local uneven diffusion of the magnetic lines of force is reduced.

A plurality of blocking ribs 4 are arranged on the wire coil 1, and a wire winding groove 5 is formed between two adjacent blocking ribs 4.

The blocking ribs 4 are respectively and uniformly arranged on the coil 12, the first magnetic stripe groove 6 and the second magnetic stripe groove 7 of the wire coil and face one side of the coil 2. The rib 4 is the arc setting, and the winding groove 5 that forms between two adjacent rib 4 is a plurality of diameter different concentric circles and evenly lays, and winding groove 5 fully supports coil 2 and maintains its planarization, avoids coil 2 part indent, can avoid coil 2 different positions to the distance of electromagnetism stove pan supporting panel surface different. The flatness of the coil 2 and the magnetic force lines of the coil are uniformly moved upwards, so that the induction cooker is heated more uniformly.

The first magnetic stripe body 313 adopts the mode setting of glue to connect in first magnetic stripe groove 6, and the second magnetic stripe body 322 adopts the mode setting of glue to connect in second magnetic stripe groove 7.

The first magnetic stripe body 313 and the second magnetic stripe body 322 are arranged in a straight structure, and the first magnetic stripe groove 6 and the second magnetic stripe groove 7 are respectively matched with the shapes of the first magnetic stripe body 313 and the second magnetic stripe body 322.

The wire coil inner ring 11 is provided with a wire coil inner ring opening 111 for the first magnetic stripe first side wall 311 to extend, the wire coil outer ring 13 is provided with a wire coil outer ring first opening 131 for the first magnetic stripe second side wall 312 to extend and a wire coil outer ring second opening 132 for the second magnetic stripe first side wall 321 to extend, the wire coil inner ring opening 111 and the wire coil outer ring first opening 131 are respectively communicated with the first magnetic stripe groove 6, and the wire coil outer ring second opening 132 is communicated with the second magnetic stripe groove 7.

The first magnetic stripe 31 adopts integrated into one piece's mode and is the U type, first magnetic stripe first lateral wall 311 is located one side of first magnetic stripe body 313, first magnetic stripe second lateral wall 312 is located the opposite side of first magnetic stripe body 313, when first magnetic stripe 31 installs at first magnetic stripe groove 6, first magnetic stripe first lateral wall 311 aims at drum inner race opening 111, first magnetic stripe second lateral wall 312 aims at drum outer lane first opening 131, first magnetic stripe body 313 is close to first magnetic stripe groove 6 direction, when first magnetic stripe body 313 laminating holding is in first magnetic stripe groove 6, first magnetic stripe first lateral wall 311 stretches out to drum inner race opening 111's upside, first magnetic stripe second lateral wall 312 stretches out to drum outer race first opening 131's upside, first magnetic stripe first lateral wall 311 and first magnetic stripe second lateral wall 312's upper end all are higher than coil 2's up end this moment.

The second magnetic stripe 32 adopts integrated into one piece's mode and is L type, and second magnetic stripe first lateral wall 321 is located one side of second magnetic stripe body 322, and when second magnetic stripe 32 was installed at second magnetic stripe groove 7, second magnetic stripe first lateral wall 321 aimed at drum outer lane second opening 132, and second magnetic stripe body 322 is close to second magnetic stripe groove 7 direction, and when second magnetic stripe body 322 laminating holding at second magnetic stripe groove 7, second magnetic stripe first lateral wall 321 stretches out to drum outer lane second opening 132's upside, and the upper end of second magnetic stripe first lateral wall 321 is higher than the up end of coil 2 this moment.

According to the invention, the magnetic field leaked by the magnetic strip 3 in the wire coil 1 is upwards transferred by arranging the first magnetic strip first side wall 311, the first magnetic strip second side wall 312 and the second magnetic strip first side wall 321, so that the magnetic field is more concentrated at the bottom of the cooker, and the cooker heats more fully and uniformly, thereby improving the heating efficiency of the device, the first magnetic strip 31 and the second magnetic strip 32 can gather magnetic force lines towards the center direction of the wire coil 1, reducing the outward diffusion of the magnetic force lines, reducing the outward radiation value of the wire coil, weakening the reverse heating, avoiding the damage failure caused by self-heating of an electrical element when the magnetic force lines are concentrated at the lower side of the wire coil 1, and ensuring the stable operation of the induction cooker.

The embodiment of example 2 is as follows:

example 2 on the basis of example 1, there is an embodiment in which a wire inlet 24 is provided at a position of the wire coil 1 near the center thereof for one end of the coil 2 to be inserted, the coil 2 is wound in a unidirectional winding manner, and a single wire is wound from the inside to the outside of the wire coil 1 in a counterclockwise direction to form a multi-turn coil. The winding groove 5 is used for fixing the coil 2 through clamping, so that loose displacement of the coil 2 in the operation process is avoided, the process of gluing by using glue can be reduced, and the coil 2 is prevented from being tilted due to fixing failure.

The rib 4 is provided with a plurality of ribs, the rib 4 is arranged from the inner side of the wire coil 1 to the outer side of the wire coil 1 at intervals to form a plurality of concentric circles, and the winding grooves 5 are arranged at intervals in the concentric circles. The ribs 4 in the concentric circles are arranged at intervals, and a winding gap 41 is arranged between two adjacent ribs 4.

The coil 2 is arranged in a non-uniform winding manner, the coil 2 comprises an inner magnetic induction area 21, a middle magnetic induction area 22 and an outer magnetic induction area 23, the winding density of the inner magnetic induction area 21 is greater than that of the middle magnetic induction area 22, and the winding density of the outer magnetic induction area 23 is greater than that of the middle magnetic induction area 22. Through inboard magnetic induction district 21 and outside magnetic induction district 23 simultaneously with the wire winding density difference in well magnetic induction district 22, can split into a plurality of different density intervals with coil 2, the heating crest that forms between the different density interval, for single heating crest, this embodiment can make the pan bottom be heated more evenly through a plurality of heating crest.

The coil 2 is provided with a jumper area 8, and the jumper area 8 comprises a jumper wire outlet end 81 and a jumper wire inlet end 82 which are sequentially used for winding, wherein the jumper wire inlet end 82 and the jumper wire outlet end 81 differ by at least one winding groove 5. The jumper wire region 8 enables the inner magnetic induction region 21, the middle magnetic induction region 22 and the outer magnetic induction region 23 to have different gaps, so that the heat dissipation performance of the wire coil 1 can be further improved, the total length of winding of the coil 2 can be reduced, and the cost is saved.

Meanwhile, as the first magnetic stripe groove 6 and the second magnetic stripe groove 7 are additionally arranged, the heat dissipation area of the coil 2 is reduced, and the gaps of the middle magnetic induction area 22 are further increased by reducing the winding density of the middle magnetic induction area 22, so that the heat dissipation speed is improved. By reducing the number of turns of the coil 2, the scratch thinning of the insulating layer on the outer surface of the coil 2 is reduced, and the possibility that the jumper wire area 8 of the coil 2 has abnormal temperature rise, short circuit ignition and the like is further reduced.

As shown in fig. 5, 6, 10, and 11, the embodiment of example 3 is as follows:

example 3 the following embodiment is based on example 2, wherein the wire of the coil is extended from the wire inlet 24, the coil 2 adopts a unidirectional winding mode, and a multi-turn coil is formed by winding one wire in a single counterclockwise direction from the inside to the outside of the coil 1.

At this time, there are two jumper areas in the wire coil outer ring 13.

At this time, the winding density of the inner magnetic induction area 21 is greater than the winding density of the middle magnetic induction area 22, and the winding density of the outer magnetic induction area 23 is greater than the winding density of the middle magnetic induction area 22.

Compared with the prior art, the coil 2 can be split into a plurality of different density intervals through the winding density difference of the inner magnetic induction area 21 and the outer magnetic induction area 23 and the middle magnetic induction area 22, and the heating wave peaks formed between the different density intervals are more uniform in heating of the bottom of the cooker through the plurality of heating wave peaks relative to a single heating wave peak.

In this embodiment, the wire is selectively wound one or two turns.

As can be seen from fig. 6, the jumper area 8 of the inner magnetic induction area 21 enables the inner magnetic induction area 21 to be split into two sets of coils 2, the jumper area 8 of the middle magnetic induction area 22 enables the inner magnetic induction area 21 to be split into three sets of coils 2, and the jumper area 8 of the outer magnetic induction area 23 enables the outer magnetic induction area 23 to be split into two sets of coils 2. In the winding grooves 5 between the plurality of consecutive winding coils 2, at least one set of two-turn wound winding grooves 5 and one set of one-turn wound winding grooves 5 are provided.

In the embodiment, one-way winding is performed by a wire through a multi-area jumper method, and the continuous winding can ensure that the production and the manufacturing are more coherent, and a plurality of groups of coils 2 are not required to be arranged, so that the materials and the cost are further saved.

As shown in fig. 5, 6, 10, and 12, the embodiment of example 4 is as follows:

embodiment 4 differs from embodiment 3 in that the winding density of the inner magnetic induction area 21 is increased, the winding density of the middle magnetic induction area 22 is kept constant, the winding density of the outer magnetic induction area 23 is reduced, the coil 2 is continuously wound to the seventh coil of the coil inner ring after the coil inner ring 11 is wound to the sixth coil in the same winding manner as the coil inner ring 11, the seventh coil of the coil inner ring enters the coil middle ring 12 after being in a full state, and the density of the coil inner ring 11 of embodiment 4 is greater than that of the coil inner ring 11 of embodiment 3:

In the case that the winding mode of the coil 12 in the coil is the same as that of the embodiment 3, after the coil 2 is wound to the sixth coil in the coil, the coil 2 moves to the sixth coil winding groove A in the coil, the coil 2 extends out of the sixth coil winding groove A in the coil to the winding gap 41, the coil 2 continues to be wound in the anticlockwise direction into the second coil winding groove B in the coil outer ring, at this time, a jumper wire area 8 of the middle magnetic induction area 22 is formed, the jumper wire outlet end 81 is positioned in the sixth coil winding groove A in the coil, the jumper wire inlet end 82 is positioned in the second coil winding groove B in the coil outer ring, and the difference between the sixth coil winding groove A in the coil and the second coil winding groove B in the coil outer ring is two coil winding grooves 5, namely, the seventh coil winding groove in the coil outer ring and the first coil winding groove in the coil outer ring; the density of the coil 12 of example 4 is equal to the density of the coil 12 of example 3;

under the condition that the winding mode of the coil outer ring 13 is the same as that of the embodiment 3, after the coil outer ring 13 is wound for the fourth circle, the coil 2 moves to the fourth circle winding groove A of the coil outer ring, the coil 2 extends out of the fourth circle winding groove A of the coil outer ring to the winding gap 41, the coil 2 continues to be wound in the sixth circle winding groove B of the coil outer ring in the anticlockwise direction, the jumper wire area 8 of the outer magnetic induction area 23 is formed at the moment, the jumper wire outlet end 81 is located in the fourth circle winding groove A of the coil outer ring, the jumper wire inlet end 82 is located in the sixth circle winding groove B of the coil outer ring, and the difference between the fourth circle winding groove A of the coil outer ring and the sixth circle winding groove B of the coil outer ring is one circle winding groove 5.

The lead continues to coil until the last coil stretches out, and the coil 2 is manufactured. The density of the wire coil outer ring 13 of example 4 is less than the density of the wire coil outer ring 13 of example 3;

at this time, the number of jumper areas 8 of the inner magnetic induction area 21 is one, the number of jumper areas 8 of the middle magnetic induction area 22 is three, the number of jumper areas 8 of the outer magnetic induction area 23 is three, and at this time, magnetic force lines are slightly concentrated at the position of the wire coil inner ring 11 to form inner trapezoid disk-shaped heating distribution, and compared with the prior art, the blind spot of the pot load center is small. According to the heating characteristics, the heating device is more suitable for use scenes such as quick-frying, frying and the like, is not easy to stick to a pot and is easier to control firepower cooking.

As shown in fig. 5, 6, 10, and 13, the embodiment of example 5 is as follows:

embodiment 5 differs from embodiment 3 in that the winding density of the inner magnetic induction region 21 is reduced, the winding density of the middle magnetic induction region 22 is kept unchanged, and the winding density of the outer magnetic induction region 23 is increased;

after the coil 2 is wound on the coil inner ring 11 for the first circle, the coil 2 moves to the first coil winding groove A of the coil inner ring, the coil 2 extends out of the first coil winding groove A of the coil inner ring to the winding gap 41, the coil 2 continues to be wound in the third coil winding groove B of the coil inner ring in the anticlockwise direction, the jumper wire area 8 of the inner magnetic induction area 21 is formed at the moment, the jumper wire outlet end 81 is positioned in the first coil winding groove A of the coil inner ring, the jumper wire inlet end 82 is positioned in the third coil winding groove B of the coil inner ring, and the first coil winding groove A of the coil inner ring and the third coil winding groove B of the coil inner ring differ by one coil winding groove 5.

In the case of the coil 2, the coil inner ring 11 and the coil inner ring 12 are wound in the same manner as in example 3, the coil outer ring 13 is different from example 3 in that the coil 2 is continuously wound to the third coil of the coil outer ring after the coil outer ring 13 is wound to the second coil, the wire is continuously wound to the last coil to extend, and the coil 2 is manufactured.

At this time, the number of jumper areas 8 of the inner magnetic induction area 21 is three, the number of jumper areas 8 of the middle magnetic induction area 22 is three, the number of jumper areas 8 of the outer magnetic induction area 23 is one, and magnetic force lines are slightly concentrated at the wire coil outer ring 13, so that outer trapezoid-shaped disc-shaped heating distribution is formed. Compared with the prior art, the pot has large heating area on the periphery, and is more suitable for cooking thick food materials such as soup, porridge, medicinal herbs, stewed and the like according to the heating characteristic.

The above embodiments 3, 4 and 5 illustrate the ductility of the winding method based on the winding method principle of the coil 2 and the distribution method principle of the magnetic stripe 3, and are not limited to the implementation of the above three types of targeted application scenarios. According to the principles of the present invention, it is possible, by other embodiments, to achieve an infinitely near completely uniform heating of the wire coil 1 over a limited diameter range.

The foregoing examples are provided to further illustrate the technical contents of the present invention for the convenience of the reader, but are not intended to limit the embodiments of the present invention thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.

Claims

1. The utility model provides an electromagnetic induction device of even heating, includes drum (1), be equipped with coil (2) and magnetic stripe (3) on drum (1), magnetic stripe (3) are radial distribution, its characterized in that: the upper end face of the magnetic strip (3) is higher than the upper end face of the coil (2);

a plurality of blocking ribs (4) are arranged on the wire coil (1), and a wire winding groove (5) is formed between two radially adjacent blocking ribs (4);

wire coil (1) is equipped with drum inner circle (11), drum middle circle (12) and drum outer lane (13) from inside to outside in proper order, coil (2) adopt inhomogeneous wire winding mode to set up, coil (2) are including inboard magnetic induction district (21), well magnetic induction district (22) and outside magnetic induction district (23), the wire winding density in inboard magnetic induction district (21) is greater than or equal to the wire winding density in well magnetic induction district (22), the wire winding density in outside magnetic induction district (23) is greater than or equal to the wire winding density in well magnetic induction district (22).

2. An electromagnetic induction apparatus for uniform heating according to claim 1, wherein: the rib (4) is arranged from the inner side of the wire coil (1) to the outer side of the wire coil (1) at intervals, the winding grooves (5) are arranged at intervals in concentric circles, and winding gaps (41) are formed between every two adjacent winding grooves (5).

3. An electromagnetic induction apparatus for uniform heating according to claim 2, wherein: the coil (2) is provided with jumper areas (8), each jumper area (8) comprises a jumper wire outlet end (81) and a jumper wire inlet end (82), wherein the jumper wire outlet ends (81) penetrate through and penetrate through the winding gaps (41) in sequence and are used for winding, and the phase difference between each jumper wire inlet end (82) and the corresponding jumper wire outlet end (81) is at least one winding groove (5).

4. A uniformly heated electromagnetic induction apparatus according to claim 3, wherein: the coil (2) is provided with one coil and is arranged on the wire coil (1) in a coiled shape, the magnetic strip (3) comprises a first magnetic strip (31) and a second magnetic strip (32), and the coil (2) is positioned between the first magnetic strip (31) and the second magnetic strip (32);

the first magnetic stripe (31) is provided with a first magnetic stripe first side wall (311) and a first magnetic stripe second side wall (312) which are respectively arranged oppositely, and a first magnetic stripe body (313) which is positioned between the first magnetic stripe first side wall (311) and the first magnetic stripe second side wall (312), and the second magnetic stripe (32) is provided with a second magnetic stripe first side wall (321) and a second magnetic stripe body (322);

the first magnetic stripe first side wall (311) is positioned on the inner side of the wire coil (1), and the first magnetic stripe second side wall (312) and the second magnetic stripe first side wall (321) are positioned on the outer side of the wire coil (1);

The upper end faces of the first magnetic stripe first side wall (311), the first magnetic stripe second side wall (312) and the second magnetic stripe first side wall (321) are flush and higher than the upper end face of the coil (2).

5. The uniformly heated electromagnetic induction apparatus of claim 4, wherein: the back of the wire coil (1) is provided with a first magnetic stripe groove (6) for accommodating the first magnetic stripe body (313) and a second magnetic stripe groove (7) for accommodating the second magnetic stripe body (322).

6. An electromagnetic induction apparatus for uniform heating according to claim 5, wherein: the first magnetic stripe groove (6) extends from the wire coil inner ring (11) to the wire coil outer ring (13), and the second magnetic stripe groove (7) extends from the wire coil middle ring (12) to the wire coil outer ring (13).

7. An electromagnetic induction apparatus for uniform heating according to claim 5, wherein: wire coil inner circle (11) are equipped with confession wire coil inner circle opening (111) that first magnetic stripe first side wall (311) stretched out, wire coil outer lane (13) are equipped with confession wire coil outer lane first opening (131) that first magnetic stripe second side wall (312) stretched out, and confession wire coil outer lane second opening (132) that second magnetic stripe first side wall (321) stretched out, wire coil inner circle opening (111) with wire coil outer lane first opening (131) respectively with first magnetic stripe groove (6) intercommunication, wire coil outer lane second opening (132) with second magnetic stripe groove (7) intercommunication.

8. The uniformly heated electromagnetic induction apparatus of claim 7, wherein: the first magnetic strips (31) and the second magnetic strips (32) are all provided with a plurality of, and the second opening (132) of the wire coil outer ring is positioned at the middle points of the arcs of the first openings (131) of the adjacent two wire coil outer rings.

9. An electromagnetic induction apparatus for uniform heating according to claim 5, wherein: the blocking ribs (4) are respectively and uniformly arranged on the coil middle ring (12), the first magnetic stripe groove (6) and the second magnetic stripe groove (7) and face one side of the coil (2).

10. A winding method according to any one of claims 3 to 9, comprising the steps of:

s1, starting to coil an inserted wire from the innermost ring of the wire coil inner ring (11) along the winding groove (5) in a unidirectional continuous mode to form an inner magnetic induction area (21), wherein the inner magnetic induction area (21) is at least provided with a jumper wire area (8), and the jumper wire inlet end (82) in the inner magnetic induction area (21) is different from the jumper wire outlet end (81) corresponding to the jumper wire inlet end by at least one circle of winding groove (5);

s2, a wire is coiled in a unidirectional and continuous mode along the winding grooves (5) by the wire coil middle ring (12) to form a middle magnetic induction area (22), the middle magnetic induction area (22) is provided with at least two jumper wire areas (8), and the difference between the jumper wire inlet ends (82) of the middle magnetic induction area (22) and the jumper wire outlet ends (81) corresponding to the jumper wire inlet ends is at least one circle of winding grooves (5);

S3, the wire is coiled continuously along the winding groove (5) by the wire coil outer ring (13) in a unidirectional manner to form an outer magnetic induction area (23), at least one jumper wire area (8) is arranged in the outer magnetic induction area (23), and the phase difference between the jumper wire inlet end (82) of the outer magnetic induction area (23) and the jumper wire outlet end (81) corresponding to the jumper wire inlet end is at least one winding groove (5); the lead is coiled until the last circle extends out, and the coil (2) is manufactured.