CN111800899A - Electromagnetic heating unit and assembly - Google Patents
Electromagnetic heating unit and assembly Download PDFInfo
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- CN111800899A CN111800899A CN202010754032.6A CN202010754032A CN111800899A CN 111800899 A CN111800899 A CN 111800899A CN 202010754032 A CN202010754032 A CN 202010754032A CN 111800899 A CN111800899 A CN 111800899A
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- magnetic
- electromagnetic heating
- magnetic core
- conductor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
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- General Induction Heating (AREA)
Abstract
The invention is suitable for the technical field of electromagnetic heating, and provides an electromagnetic heating unit and an electromagnetic heating assembly, wherein the electromagnetic heating unit comprises: a magnetic core, a conductor; the magnetic core is composed of a plurality of associated pieces of magnetic posts; the conductor is arranged around the magnetic column; the magnetic force line of the conductor penetrates through the magnetic column. The invention changes the mode that the coil of the traditional heating component is tiled in a single layer, so that the magnetic field intensity in the magnetic core is almost at the maximum everywhere; the traditional heating component is changed to be in the form of air magnetic conduction, and the magnetic conduction is realized by adopting a high-permeability high-resistivity material; the magnetic circuit of the heating element is changed, so that the eddy current of the heating element flows in a closed manner in the plane where the heating element is contacted with the magnetic core; the number of turns and the radius of the winding coil are reduced, and the length of the winding coil is further greatly reduced; through combining the electromagnetic heating units, multipoint uniform heating is formed, and the phenomena that the central temperature of a traditional heating assembly is highest and the peripheral temperature is lower are changed.
Description
Technical Field
The invention belongs to the technical field of electromagnetic heating, and particularly relates to an electromagnetic heating unit and an electromagnetic heating assembly.
Background
Nowadays, the popularity of electromagnetic heat energy products is very high, such as household induction cookers, electromagnetic steam boilers and the like. The electromagnetic heating component is a core component, however, the existing electromagnetic heating component has many disadvantages: distances between conductors and between coils and a pot are large, so that magnetic energy loss is large, and efficiency is low; the magnetic conductor is air, the magnetic circuit is in an uncontrollable divergence state, and the magnetic leakage and the electromagnetic radiation are large, so that certain damage is caused to the health of a human body; the magnetic circuit is single, and the maximum magnetic flux density is concentrated in the central area of the wire coil, so that the heating is uneven; because the magnetic circuit is in a state of uncontrollable divergence, the design difficulty of the control circuit is high, the working frequency is low, which is usually 20 KHz-40 KHz, the efficiency is low, and the relative cost is high.
Disclosure of Invention
It is an object of embodiments of the present invention to provide an electromagnetic heating unit, which aims to solve the problems mentioned in the background art.
The embodiment of the present invention is achieved by an electromagnetic heating unit, including:
a magnetic core, a conductor;
the magnetic core is composed of a plurality of associated pieces of magnetic posts;
the conductor is arranged around the magnetic column;
the magnetic force line of the conductor penetrates through the magnetic column.
Preferably, the magnetic core is composed of two associated magnetic columns, wherein at least one of the magnetic columns is provided with a conductor.
Preferably, the magnetic core is composed of three associated magnetic columns, wherein at least one of the magnetic columns is provided with a conductor.
Preferably, a plurality of said associated magnetic pillars are located on the same plane, or on a curved surface, or on a polyhedral surface.
Preferably, the conductor is a winding coil or a PCB.
Another object of an embodiment of the present invention is to provide an electromagnetic heating assembly, which is formed by electrically connecting a plurality of electromagnetic heating units as described above.
Preferably, a plurality of the electromagnetic heating units are arranged in a circumferential array or a rectangular array.
Preferably, a plurality of electromagnetic heating units are positioned on the same plane, or on a curved surface, or on a polyhedral surface.
According to the electromagnetic heating unit provided by the embodiment of the invention, magnetic lines of force are bound in the magnetic column of the magnetic core, so that the coil of the traditional heating component is changed into a single-layer tiled form, and the magnetic field intensity in the magnetic core is almost in the maximum value everywhere; the traditional heating component is changed to be in the form of air magnetic conduction, and the magnetic conduction is realized by adopting a high-permeability high-resistivity material; the magnetic circuit of the heating element is changed, so that the electric eddy current of the heating element flows in a closed manner in the plane where the heating element is contacted with the magnetic core; the number of turns and the radius of the winding coil are reduced, and the length of the winding coil is greatly reduced (about 1/2 of the conventional annular coil, and the loss of the winding coil is reduced to 1/2 of the conventional annular coil). Through combining the electromagnetic heating units, multipoint uniform heating is formed, and the phenomena that the central temperature of a traditional heating assembly is highest and the peripheral temperature is lower are changed.
In summary, the present invention has the following advantages:
1. the magnetic circuit of the electromagnetic heating unit is clear and controllable, and the magnetic circuit can be split and combined according to actual needs (important for products such as local welding, quenching and the like);
2. leakage inductance can be greatly reduced, the magnetic radiation of the heating component tends to 0, and the healthy and environment-friendly index of the product is improved;
3. the magnetic circuit parameters are stable, the consistency is good (if a PCB is adopted as a conductor, the consistency is close to 99.9%), the switching frequency can be greatly improved, and the efficiency is further improved;
4. the production process is mature, and if the PCB is adopted as a conductor, the yield can reach more than 99.9%;
5. the cost is low, and the ferrite is a general material of a high-frequency transformer and has very low price; if the conductor adopts a PCB, the cost of the conductor is lower than that of the traditional heating component (because the production process is greatly simplified);
6. the working frequency is improved, the peak current is reduced under the same power, the cost of the switch tube is reduced to some extent, and the overall cost of the product is further reduced to some extent.
Drawings
Fig. 1 is a schematic diagram of an electromagnetic heating unit according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a magnetic core formed by two associated magnetic pillars according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a magnetic core formed by three associated magnetic pillars according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an integrally formed magnetic core comprising a plurality of associated magnetic pillars, according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an integrally formed magnetic core comprising a plurality of associated magnetic pillars, according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a rectangular integrally formed magnetic core according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electromagnetic heating assembly including five electromagnetic heating units arranged in a circumferential array according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electromagnetic heating assembly including six electromagnetic heating units arranged in a circumferential array according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an electromagnetic heating assembly including four electromagnetic heating units arranged in a circumferential array according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an electromagnetic heating assembly including eight electromagnetic heating units arranged in a circumferential array according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an electromagnetic heating assembly including electromagnetic heating units arranged in a rectangular array according to an embodiment of the present invention;
fig. 12 is an electromagnetic heating assembly in which the electromagnetic heating units according to the embodiment of the present invention are arranged on a circumferential curved surface.
In the drawings: 1. a magnetic column; 2. a conductor; 3. magnetic lines of force; 4. a heating element; 5. a magnetic core side post; 6. a magnetic core center pillar; 7. a base; 8. an electromagnetic heating unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
An embodiment of the present invention provides an electromagnetic heating unit, including:
a magnetic core, a conductor 2;
the magnetic core is composed of a plurality of associated magnetic columns 1;
the conductor 2 is arranged around the magnetic column 1;
the magnetic lines of force 3 of the conductor 2 penetrate through the magnetic column 1.
As shown in fig. 1, when a current flows in a conductor 2, the current generates a magnetic field around the conductor 2, and magnetic lines 3 of the magnetic field penetrate a magnetic column 1, and according to the principle of electromagnetic heating, when the current changes constantly, the generated changing magnetic field causes a heating element 4 located above the magnetic column 1 to generate heat. In addition, according to the theory of magnetic induction, the magnetic induction is proportional to the magnetic permeability and the magnetic field intensity. The conventional heating component is air-permeable, i.e. the magnetic permeability is 1. According to the invention, a material with high magnetic conductivity and high resistivity is used as a magnetic core, the magnetic conductivity is 2000-10000, and the generated magnetic induction intensity is far greater than that of the traditional heating component. In summary, the present invention has the following advantages:
1. the magnetic circuit of the electromagnetic heating unit is clear and controllable, and the magnetic circuit can be split and combined according to actual needs (important for products such as local welding, quenching and the like);
2. leakage inductance can be greatly reduced, the magnetic radiation of the heating component tends to 0, and the healthy and environment-friendly index of the product is improved;
3. the magnetic circuit parameters are stable, the consistency is good (if the PCB is adopted as the conductor 2, the consistency is close to 99.9%), the switching frequency can be greatly improved, and the efficiency is further improved;
4. the production process is mature, and if the PCB is adopted as the conductor 2, the yield can reach more than 99.9%;
5. the cost is low, and the ferrite is a general material of a high-frequency transformer and has very low price; if the conductor adopts a PCB, the cost of the conductor is lower than that of the traditional heating component (because the production process is greatly simplified);
6. the working frequency is improved, the peak current is reduced under the same power, the cost of the switch tube is reduced to some extent, and the overall cost of the product is further reduced to some extent.
As shown in fig. 2, as a preferred embodiment of the present invention, the magnetic core is composed of two associated magnetic pillars 1, wherein at least one of the magnetic pillars 1 is provided with a conductor 2.
Specifically, the two magnetic columns 1 may be made into a cylindrical shape, and the conductor 2 is disposed on the two cylindrical magnetic columns 1 (an electromagnetic heating unit formed by the conductor and the conductor is hereinafter referred to as a two-core electromagnetic heating unit).
As shown in fig. 3, as a preferred embodiment of the present invention, the magnetic core is composed of three associated magnetic columns 1, wherein at least one of the magnetic columns 1 is provided with a conductor 2.
Specifically, the magnetic core may be composed of three associated magnetic columns 1 whose centers are located on the same straight line, the magnetic column 1 located in the middle is referred to as a magnetic core center column 6, the magnetic columns 1 located on both sides are referred to as magnetic core side columns 5, and the conductor 2 is disposed on the magnetic core center column 6 (the electromagnetic heating unit composed of the electromagnetic heating unit and the conductor is hereinafter simply referred to as a three-core electromagnetic heating unit).
Besides the magnetic cores provided by the two preferable schemes, the magnetic core can be integrally formed by four or more related magnetic columns. As shown in fig. 4, a circular integrated magnetic core is provided, and the magnetic core in the figure is composed of three parts, wherein the outermost layer is a circumferential array of magnetic core side pillars 5, the middle layer is a circumferential array of magnetic core center pillars 6, and the center is a magnetic core side pillar 5. As shown in fig. 5, another circular integrated magnetic core is provided, the magnetic core in the figure is composed of four parts, the outermost layer is a circumferential array of magnetic core side pillars 5, the second outer layer is a circumferential array of magnetic core center pillars 6, the next intermediate layer is a circumferential array of magnetic core side pillars 5, and the center is a magnetic core center pillar 6. Analogize from this, the scheme of figure 4 and 5 can be inferred to be a body magnetic core, and this body magnetic core includes outermost magnetic core edge column 5, and the center is magnetic core edge column 5 or magnetic core center pillar 6, can include the magnetic core edge column layer of arbitrary many circumference arrays and the magnetic core center pillar layer of circumference array between outermost and the center, and magnetic core edge column layer and magnetic core center pillar layer interval in proper order arrange. In addition to the above-mentioned circular integrated magnetic core solution, as shown in fig. 6, a rectangular integrated magnetic core is provided, the magnetic core in the figure is composed of five rows of magnetic pillars 1, the first row is a magnetic core side pillar 5 in a bar shape, the second row is a cylindrical magnetic core center pillar 6 in which a plurality of pieces of straight lines are arranged, the third row is a magnetic core side pillar 5 in a bar shape, the fourth row is a cylindrical magnetic core center pillar 6 in which a plurality of pieces of straight lines are arranged, and the fifth row is a magnetic core side pillar 5 in a bar shape. Analogize from this, the scheme of figure 6 can be inferred to be an integrative magnetic core, and this integrative magnetic core includes arbitrary many magnetic columns row, and the outermost both sides are two magnetic core limit posts 5, and the centre is arbitrary many magnetic core limit post row and magnetic core center pillar row, and magnetic core limit post row and magnetic core center pillar are arranged in proper order.
As a preferred embodiment of the present invention, a plurality of the associated magnetic pillars 1 are located on the same plane, or on a curved surface, or on a polyhedral surface.
As a preferred embodiment of the present invention, the conductor 2 is a winding coil or a PCB board.
Specifically, the number of turns and the radius of the winding coil are reduced, so that the length of the winding coil is greatly reduced (about 1/2 of the traditional annular coil, the resistance and the loss of the winding coil are also reduced to 1/2 of the traditional annular coil), and the conversion efficiency of the heating assembly is improved. If the PCB is adopted as the conductor 2, the process can be simplified, and the yield can reach more than 99.9%.
The invention further provides an electromagnetic heating assembly, which is formed by electrically connecting a plurality of electromagnetic heating units in any one of the above-mentioned items.
Specifically, the electromagnetic heating unit 8 constituting the electromagnetic heating assembly may be a two-core electromagnetic heating unit, a three-core electromagnetic heating unit, an integrally formed electromagnetic heating unit, or even other multi-core electromagnetic heating units. According to the invention, the electromagnetic heating units are combined to form multipoint uniform heating, so that the phenomena of highest central temperature and lower peripheral temperature of the traditional heating component are changed.
As a preferred embodiment of the present invention, a plurality of the electromagnetic heating units are arranged in a circumferential array or a polygonal array.
As shown in fig. 7, an electromagnetic heating assembly is provided, which is formed by three magnetic core electromagnetic heating units 8 arranged in a circumferential array, the electromagnetic heating assembly in the figure is formed by five three magnetic core electromagnetic heating units 8 arranged in a circumferential array, the magnetic cores are made of ferrite, and the winding coils are made of multi-strand copper wires. Firstly, winding coils are uniformly wound on a magnetic core center column, then an electromagnetic heating unit 8 is placed on a base 7 and connected through a conducting wire, then an iron pan is placed on the magnetic core, and 1 liter of water is filled in the iron pan. A universal forward resonant circuit is adopted as a control circuit, the frequency is controlled to be 20 KHz-40 KHz, the test power is 1200W, and water in the iron pan is boiled after about 6 minutes. As shown in fig. 8, another electromagnetic heating assembly is provided, which is composed of three magnetic core electromagnetic heating units 8 arranged in a circumferential array, and the electromagnetic heating assembly is compared with fig. 7, wherein the angle of the electromagnetic heating units 8 is changed. In fact, such an electromagnetic heating assembly may be formed by arranging any number of electromagnetic heating units 8 in a circumferential array, for example, fig. 9 shows an electromagnetic heating assembly formed by arranging four electromagnetic heating units 8 in a circumferential array, and fig. 10 shows an electromagnetic heating assembly formed by arranging eight electromagnetic heating units 8 in a circumferential array.
As shown in fig. 11, an electromagnetic heating assembly with three magnetic core electromagnetic heating units 8 arranged in a rectangular array is provided, in the figure, the electromagnetic heating assembly is formed by arranging 6 three magnetic core electromagnetic heating units 8 in a rectangular array, and in fact, such an electromagnetic heating assembly can be formed by arranging any plurality of electromagnetic heating units 8 in a polygonal array.
As a preferred embodiment of the present invention, a plurality of the electromagnetic heating units are located on the same plane, or on a curved surface, or on a polyhedral surface.
As shown in fig. 12, there is provided an electromagnetic heating assembly in which two magnetic core electromagnetic heating units 8 are arranged on a circumferential curved surface, and the heating element 4 is located inside the electromagnetic heating assembly. Besides, a plurality of electromagnetic heating units can be combined randomly in any space surface such as a plane, a curved surface, a polyhedral surface and the like according to actual heating requirements so as to meet the requirement of multipoint uniform heating.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. An electromagnetic heating unit, characterized in that the electromagnetic heating unit comprises:
a magnetic core, a conductor;
the magnetic core is composed of a plurality of associated pieces of magnetic posts;
the conductor is arranged around the magnetic column;
the magnetic force line of the conductor penetrates through the magnetic column.
2. An electromagnetic heating unit as claimed in claim 1, wherein said core is comprised of two associated legs, at least one of said legs having a conductor thereon.
3. An electromagnetic heating unit as claimed in claim 1, wherein said magnetic core is comprised of three associated legs, wherein at least one of said legs is provided with a conductor.
4. An electromagnetic heating unit as claimed in claim 1, wherein a plurality of said associated magnetic posts are located on the same plane, or on a curved surface, or on a polyhedral surface.
5. Electromagnetic heating unit according to claim 1 or 4, characterized in that the conductor is a winding coil or a PCB board.
6. An electromagnetic heating assembly, characterized in that the electromagnetic heating assembly is formed by electrically connecting a plurality of electromagnetic heating units according to any one of claims 1 to 5.
7. An electromagnetic heating assembly as claimed in claim 6, wherein a plurality of said electromagnetic heating units are arranged in a circumferential array or a polygonal array.
8. An electromagnetic heating unit as claimed in claim 6, wherein a plurality of said electromagnetic heating units are located on the same plane, or on a curved surface, or on a polyhedral surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754032.6A CN111800899A (en) | 2020-07-30 | 2020-07-30 | Electromagnetic heating unit and assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754032.6A CN111800899A (en) | 2020-07-30 | 2020-07-30 | Electromagnetic heating unit and assembly |
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| CN111800899A true CN111800899A (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010754032.6A Pending CN111800899A (en) | 2020-07-30 | 2020-07-30 | Electromagnetic heating unit and assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113352026A (en) * | 2021-06-10 | 2021-09-07 | 宁波微鹅电子科技有限公司 | Electromagnetic welding head |
| CN113579450A (en) * | 2021-07-07 | 2021-11-02 | 宁波微鹅电子科技有限公司 | Electromagnetic welding structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202931589U (en) * | 2012-04-24 | 2013-05-08 | 美的集团股份有限公司 | Electromagnetic induction heating coil disc |
| WO2015131359A1 (en) * | 2014-03-05 | 2015-09-11 | 深圳市欣锐特科技有限公司 | Magnetic core, integrated magnetic component, active clamping forward-flyback circuit and switched-mode power supply |
| CN108207048A (en) * | 2016-12-16 | 2018-06-26 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating coil disc and electromagnetic heating kitchen tools and electromagnetic heating method |
| CN212486830U (en) * | 2020-07-30 | 2021-02-05 | 张祥林 | Electromagnetic heating unit and assembly |
-
2020
- 2020-07-30 CN CN202010754032.6A patent/CN111800899A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202931589U (en) * | 2012-04-24 | 2013-05-08 | 美的集团股份有限公司 | Electromagnetic induction heating coil disc |
| WO2015131359A1 (en) * | 2014-03-05 | 2015-09-11 | 深圳市欣锐特科技有限公司 | Magnetic core, integrated magnetic component, active clamping forward-flyback circuit and switched-mode power supply |
| CN108207048A (en) * | 2016-12-16 | 2018-06-26 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating coil disc and electromagnetic heating kitchen tools and electromagnetic heating method |
| CN212486830U (en) * | 2020-07-30 | 2021-02-05 | 张祥林 | Electromagnetic heating unit and assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113352026A (en) * | 2021-06-10 | 2021-09-07 | 宁波微鹅电子科技有限公司 | Electromagnetic welding head |
| CN113579450A (en) * | 2021-07-07 | 2021-11-02 | 宁波微鹅电子科技有限公司 | Electromagnetic welding structure |
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