CN210989769U

CN210989769U - Electromagnetic cooking utensil

Info

Publication number: CN210989769U
Application number: CN201921658354.XU
Authority: CN
Inventors: 高博敏
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-07-14
Anticipated expiration: 2029-09-30

Abstract

The embodiment of the utility model provides an electromagnetic cooking utensil. The electromagnetic cooking appliance comprises a coil panel (10), a PCB (printed circuit board) board (20) and a conductive medium (30), wherein the conductive medium (30) is made of a non-magnetic material; the conductive medium (30) is arranged outside the coil panel (10); the conducting medium (30) is connected with an emitter electrode of an Insulated Gate Bipolar Transistor (IGBT) of the PCB (20); the conductive medium (30) is used for reducing electromagnetic interference generated by the coil disc (10). The electromagnetic cooking utensil absorbs and reflects electromagnetic interference signals through the conducting medium (30), and is connected with the emitting electrode of the IGBT through the conducting medium (30), so that the turn-on time of the IGBT is shortened, and the electromagnetic interference generated by other devices is reduced.

Description

Electromagnetic cooking utensil

Technical Field

The embodiment of the utility model provides a relate to household electrical appliances technical field, especially relate to an electromagnetic cooking utensil.

Background

Electromagnetic cooking utensil is a common domestic appliance who is used for the heating, and electromagnetic cooking utensil utilizes high frequency alternating current to pass through the coil panel so that place the pan bottom on electromagnetic cooking utensil and produce the vortex at the during operation to the pan that sets up on the electromagnetic cooking utensil heats, can produce certain electromagnetic interference at electromagnetic cooking utensil at the course of the work.

In order to enable the Electromagnetic cooking appliance to meet the Electromagnetic Compatibility (EMC) requirement, improve the Electromagnetic immunity of the Electromagnetic cooking appliance, and change the number of turns of a coil plate in the Electromagnetic cooking appliance, or change the sizes of differential mode inductance and resonant capacitance, and the like. However, the improvement effect that the above scheme can achieve is often small, and the implementation cost is high.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an electromagnetic cooking utensil to improve electromagnetic cooking utensil's interference immunity.

The utility model provides an electromagnetic cooking utensil, include: the coil panel, the PCB and the conductive medium, wherein the conductive medium is a non-magnetic material;

the conductive medium is arranged on the outer side of the coil panel;

the conductive medium is connected with an emitting electrode of an Insulated Gate Bipolar Transistor (IGBT) of the PCB; the conductive medium is used for reducing electromagnetic interference generated by the coil disc.

The utility model provides an electromagnetic cooking utensil passes through conducting medium and absorbs and reflects electromagnetic interference signal to be connected with IGBT's projecting pole through conducting medium, make conducting medium and coil panel release the electric energy jointly, thereby make IGBT's on-time shorten, diminish to the electromagnetic interference that other devices in the electromagnetic cooking utensil produced.

Optionally, the conductive medium is disposed at the bottom and/or the peripheral side of the coil disk, and the conductive medium covers part or all of the coil disk.

Optionally, the conductive medium is attached to the coil panel.

The utility model provides an electromagnetic cooking utensil is through setting up conductive medium in the bottom and/or week side of this coil panel, and this conductive medium covers the part or whole of this coil panel for conductive medium absorbs and reflects some radiation interference signal that is sent out by the magnetic field, makes surrounding space electromagnetic interference diminish; through laminating conducting medium and coil panel for the ability reinforcing of conducting medium absorption electromagnetic interference signal also can further release more electric energy through conducting medium and coil panel jointly, make the on-time of IGBT shorten, and then diminish to the electromagnetic interference that produces other devices in the electromagnetic cooking utensil.

Optionally, the conductive medium is interposed between the coil disc and the PCB board, or the conductive medium is interposed between the coil disc and the base of the electromagnetic cooking appliance.

Optionally, the coil panel and the PCB board are arranged side by side or up and down.

The utility model provides an electromagnetic cooking utensil through with conductive medium set up in the coil panel with between the PCB board, perhaps between coil panel and the base, can avoid the coil panel to the reverse heating of PCB board or base, also can reduce the magnetic leakage phenomenon of coil panel, reduced the electromagnetic interference to electronic component.

Optionally, at least a portion of the conductive medium is located between the coil disc and the filter of the PCB board, for separating the coil disc from the filter of the PCB board.

Optionally, the filter device includes at least one of a differential mode inductor, a common mode inductor, a resistor, and a capacitor.

The utility model provides an electromagnetic cooking utensil is through setting up at least part of conductive medium between the filter of coil panel and PCB board for conductive medium can avoid the coil panel to the back heating of filter, also can reduce the magnetic leakage phenomenon of coil panel, has reduced the electromagnetic interference to filter.

Optionally, the conductive medium overlaps the coil panel, and an overlapping area of the conductive medium is less than one third of an area of the coil panel.

The utility model provides an electromagnetic cooking utensil is through the overlapping area of restriction conducting medium and coil panel, on having guaranteed that conducting medium reduces the electromagnetic interference's of coil panel basis, has further reduced electromagnetic cooking utensil's cost.

Optionally, the conductive medium is a non-magnetic metal sheet.

Optionally, the metal sheet is a copper sheet or an aluminum sheet.

The utility model provides an electromagnetic cooking appliance, which comprises a coil panel, a PCB board and a conductive medium, wherein the conductive medium is a non-magnetic material; the conductive medium is arranged on the outer side of the coil panel; the conductive medium is connected with an emitting electrode of an Insulated Gate Bipolar Transistor (IGBT) of the PCB; the conductive medium is used for reducing electromagnetic interference generated by the coil disc. Electromagnetic cooking utensil passes through the conducting medium and absorbs and reflects the electromagnetic interference signal to be connected with the projecting pole of IGBT through the conducting medium for the conducting medium releases the electric energy with the coil panel jointly, thereby makes the on-time of IGBT shorten, diminishes to the electromagnetic interference that other devices in the electromagnetic cooking utensil produced.

Drawings

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

FIG. 1 is a schematic structural diagram of an electromagnetic cooking apparatus in the prior art;

fig. 2 is a schematic structural diagram of an electromagnetic cooking appliance according to the present invention;

fig. 3 is a circuit diagram of an electromagnetic cooking appliance provided by the present invention;

fig. 4 is a schematic structural diagram of an electromagnetic cooking appliance according to the present invention;

fig. 5 is a schematic structural diagram of an electromagnetic cooking appliance according to the present invention;

fig. 6 is a schematic structural diagram of an electromagnetic cooking appliance according to the present invention;

fig. 7 is a schematic structural diagram of an electromagnetic cooking appliance according to the present invention;

fig. 8 is a schematic structural diagram six of an electromagnetic cooking appliance provided by the present invention;

fig. 9 is a schematic structural diagram seven of an electromagnetic cooking appliance according to the present invention.

Description of reference numerals:

10-a coil disc; 20-a PCB board; 30-a conductive medium; 40-a base;

50-a fan assembly; 60-a sensor assembly; 70-a power line; 80-a display panel;

90-upper cover; 100-porcelain plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be construed that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Electromagnetic cooking appliances, such as induction cookers, electromagnetic heating pans, and the like, mainly use the principle of high-frequency electromagnetic induction for heating. When this electromagnetic cooking utensil during operation, utilize high frequency alternating current to pass through the coil panel so that place the pan bottom production vortex at this electromagnetic cooking utensil to the pan that sets up on the electromagnetic cooking utensil heats, figure 1 is an electromagnetic cooking utensil's among the prior art structure schematic diagram, as shown in figure 1, can include among the electromagnetic cooking utensil among the prior art coil panel, PCB board, base, fan subassembly, sensor subassembly, power cord, display panel, upper cover, ceramic plate etc. and constitute.

When the electromagnetic cooking appliance works, certain electromagnetic interference can be generated, and in order to meet the national standard, the electromagnetic cooking appliance must meet the electromagnetic compatibility (EMC) requirement. Electromagnetic compatibility means that a system or equipment can work normally in an electromagnetic environment, and other systems and equipment cannot be interfered. EMC is the comprehensive assessment of the interference magnitude and the anti-interference capability of electronic products in the aspect of electromagnetic fields, and is one of the most important indexes of product quality.

For improving electromagnetic interference immunity, the utility model provides an electromagnetic cooking utensil sets up conducting medium through the outside at electromagnetic cooking utensil's coil panel, and is connected this conducting medium and the emitting pole of the Insulated Gate bipolar transistor (Insulated Gate bipolar transistor, IGBT for short) of electromagnetic cooking utensil's printed circuit Board (printedcuiit Board, PCB Board for short) to reduce the electromagnetic interference that the coil panel produced. The present invention provides an electromagnetic cooking device, which is described below with reference to specific embodiments.

Fig. 2 is a schematic structural diagram of an electromagnetic cooking appliance according to the present invention. As shown in fig. 2, the electromagnetic cooking appliance includes: the coil panel 10, the PCB board 20 and the conductive medium 30, wherein the conductive medium 30 is a non-magnetic material.

Only a partial structure of the electromagnetic cooking appliance is illustrated in fig. 2, and the structure of the other portions not illustrated in fig. 2 may be the same as the corresponding structure of the related art electromagnetic cooking appliance illustrated in fig. 1. In the present embodiment, the conductive medium 30 is disposed on the outer side of the coil disk 10, specifically, the conductive medium 30 is disposed on the non-heating area of the outer side of the coil disk 10, for example, the conductive medium 30 may be disposed at least one position of the bottom, the circumference or the upper end of the coil disk 10, which is illustrated as the bottom in fig. 2.

The conductive medium 30 is connected with an emitter electrode of an Insulated Gate Bipolar Transistor (IGBT) of the PCB 20; the conductive medium 30 serves to reduce electromagnetic interference generated from the coil disk 10.

When the electromagnetic cooking appliance works, alternating current flows through the coil panel 10, so that an alternating magnetic field is generated around the coil panel 10, and in the high-frequency alternating magnetic field, when magnetic lines of force in the magnetic field pass through the conductive medium 30, the conductive medium 30 can absorb and reflect a part of radiation interference signals emitted by the magnetic field, so that the electromagnetic interference of the surrounding space is reduced.

Further, as shown in the circuit diagram of fig. 3, the conductive medium 30 is connected to the emitter of the IGBT; the electromagnetic cooking appliance enables the coil panel 10 to generate high-frequency alternating current by controlling the on-off of the IGBT, when the IGBT is switched on, the coil panel 10 stores electric energy, and when the IGBT is switched off, the coil panel 10 releases the electric energy.

Because the conducting medium 30 is connected with the emitter of the IGBT, when the IGBT is turned on, a part of induced current is also generated in the conducting medium 30, so that a part of electric energy is also stored in the conducting medium 30, and thus when the IGBT is turned off, the conducting medium 30 and the coil panel 10 can release electric energy together to provide energy for heating the electromagnetic cooking appliance. Since the pulse period of the IGBT is fixed, the conductive medium 30 discharges electric energy together with the coil disk 10, so that the on time of the IGBT becomes short, and thus electromagnetic interference generated to other devices in the electromagnetic cooking appliance becomes small.

In this embodiment, the conductive medium 30 is made of a non-magnetic material, and optionally, the conductive medium 30 may be a non-magnetic metal sheet. For example, the metal sheet that is not magnetically conductive may be a copper sheet or an aluminum sheet. In this embodiment, the material of the conductive medium 30 is not specifically limited, and the shape of the conductive medium 30 is also not specifically limited, as long as the conductive medium 30 is made of a non-magnetic material.

The electromagnetic cooking utensil provided by the embodiment comprises a coil panel, a PCB (printed circuit board) and a conductive medium, wherein the conductive medium is a non-magnetic material; the conductive medium is arranged outside the coil panel; the conductive medium is connected with an emitter of the IGBT of the PCB; the conductive medium is used for reducing electromagnetic interference generated by the coil disc. This electromagnetic cooking utensil passes through conducting medium absorption and reflection electromagnetic interference signal to be connected through conducting medium and IGBT's emitter, make conducting medium and coil panel release the electric energy jointly, thereby make IGBT's on-time shorten, the electromagnetic interference who produces other devices in the electromagnetic cooking utensil diminishes.

The present invention provides an electromagnetic cooking apparatus, which is further exemplified by the following specific schematic structural diagrams.

On the basis of the above embodiment, the conductive medium 30 is provided on the bottom and/or the peripheral side of the coil disk 10, and the conductive medium 30 covers part or all of the coil disk.

In one possible implementation, and with continued reference to fig. 2, the conductive medium 30 is disposed at the bottom of the coil disk 10, with the conductive medium 30 covering part or all of the coil disk 10; in another possible implementation, as shown in fig. 3, the conductive media 30 are disposed on the circumferential side of the coil disk 10, and the conductive media 30 cover part or all of the coil disk 10; alternatively, it is also possible to combine fig. 2 with the conductive medium 30 shown in fig. 4, and to dispose the conductive medium 30 on the bottom and the peripheral side of the coil disk 10.

No matter the conductive medium 30 is arranged at the bottom or the peripheral side of the coil panel 10, the conductive medium 30 covers part or all of the coil panel 10, so that when the electromagnetic cooking appliance is in operation, alternating current flows through the coil panel 10, an alternating magnetic field is generated around the coil 10, and in a high-frequency alternating magnetic field, when a magnetic line of force in the magnetic field passes through the conductive medium 30, the conductive medium 30 can absorb and reflect a part of a radiation interference signal emitted by the magnetic field, so that the electromagnetic interference of the coil panel 10 to the surrounding space is reduced, and the electromagnetic interference influence of surrounding equipment is reduced.

Further, when the conductive medium 30 is disposed on the bottom and/or the peripheral side of the coil disk 10, the conductive medium 30 may be disposed to be attached to the coil disk 10, as shown in fig. 5, the conductive medium 30 is disposed on the bottom of the coil disk 10 and attached to the coil disk 10, and fig. 6 is a bottom view of the coil disk 10 corresponding to fig. 7, and the conductive medium 30 covers a portion of the coil disk 10. The conductive medium 30 is attached to the coil panel 10, so that the capability of the conductive medium 30 for absorbing and reflecting electromagnetic interference signals is enhanced, the induced current generated in the conductive medium 30 is increased, the electric energy jointly released by the conductive medium 30 and the coil panel 10 is more, the on-time of the IGBT is further shortened, and the electromagnetic interference generated on other devices in the electromagnetic cooking appliance is reduced.

The embodiment provides an electromagnetic cooking appliance including: the coil panel, the PCB board and the conductive medium, the conductive medium is a non-magnetic material; the conductive medium is arranged outside the coil; the conductive medium is connected with an emitting electrode of an Insulated Gate Bipolar Transistor (IGBT) of the PCB; the conductive medium is used for reducing electromagnetic interference generated by the coil disc. This electromagnetic cooking utensil passes through conducting medium absorption and reflection electromagnetic interference signal to be connected through conducting medium and IGBT's emitter, make conducting medium and coil panel release the electric energy jointly, thereby make IGBT's on-time shorten, the electromagnetic interference who produces other devices in the electromagnetic cooking utensil diminishes.

In addition, the electromagnetic cooking appliance of the embodiment makes the conductive medium absorb and reflect a part of the radiation interference signal emitted by the magnetic field by arranging the conductive medium at the bottom and/or the peripheral side of the coil panel, and the conductive medium covers part or all of the coil panel, so that the electromagnetic interference of the surrounding space becomes small; through laminating conducting medium and coil panel for the ability reinforcing of conducting medium absorption electromagnetic interference signal also can further release more electric energy through conducting medium and coil panel jointly, make the on-time of IGBT shorten, and then diminish to the electromagnetic interference that produces other devices in the electromagnetic cooking utensil.

In another possible implementation, with continued reference to fig. 2, a conductive medium 30 is interposed between the coil disk 10 and the PCB board 20.

Since the electromagnetic cooking appliance has various other electronic components besides the coil panel 10, especially various electronic components such as a filter circuit, a rectifier circuit, etc. on the PCB, in order to protect the electronic components, the conductive medium 30 is disposed between the coil panel 10 and the PCB 20, thereby preventing the coil panel 10 from being heated reversely, and at the same time, the conductive medium 30 can absorb the leakage flux generated by the coil panel 10, so that the leakage flux phenomenon of the coil panel 10 is reduced, and the electromagnetic interference to the electronic components is reduced.

Alternatively, the coil disk 10 and the PCB board 20 may be disposed side by side or on top of each other. In practical applications, the coil panel 10 and the PCB board 20 may be disposed side by side or on top of each other according to the structural layout of the electromagnetic cooking appliance.

For example, as shown in fig. 7, the coil panel 10 and the PCB are arranged side by side, the coil panel 10 is disposed on the left side of the upper end of the base 40 of the electromagnetic cooking appliance, the PCB is disposed on the right side of the upper end of the base 40 of the electromagnetic cooking appliance, and the conductive medium 30 is disposed between the coil panel 10 and the PCB 20, so that reverse heating of the coil panel to the PCB 20 can be avoided, the magnetic leakage phenomenon of the coil panel 10 can be reduced, and the electromagnetic interference to the electronic components of the PCB 20 can be reduced.

Or, as shown in fig. 2, the coil panel 10 and the PCB 20 are vertically disposed, the PCB 20 is disposed at the upper end of the base 40, the coil panel 10 is disposed at the upper end of the PCB 20, and the conductive medium 30 is disposed at the lower end of the coil panel 10 and the upper end of the PCB 20, so that reverse heating of the coil panel to the PCB 20 by the coil panel can be avoided, and meanwhile, the conductive medium 30 can absorb magnetic leakage generated by the coil panel 10, and also can reduce the magnetic leakage of the coil panel 10, thereby further reducing electromagnetic interference to various electronic components of the PCB 20.

In another possible implementation, as shown in fig. 8, an electrically conductive medium is interposed between the coil disk 10 and the base 40 of the electromagnetic cooking appliance.

Besides various electronic components on the PCB, the base 40 of the electromagnetic cooking device further has other devices, for example, a fan module is further disposed on the base 40, and the conductive medium 30 is disposed between the coil panel 10 and the base 40, so as to prevent the coil panel 10 from being heated reversely, reduce the magnetic leakage of the coil panel 10, and reduce the electromagnetic interference to the electronic components on the base 40. Also, in this implementation, the coil disk 10 and the PCB board 20 may be disposed side by side or on top of each other.

The embodiment provides an electromagnetic cooking appliance including: the coil panel, the PCB board and the conductive medium, the conductive medium is a non-magnetic material; the conductive medium is arranged outside the coil; the conductive medium is connected with an emitter electrode of an Insulated Gate Bipolar Transistor (IGBT) of the PCB. The conductive medium is used for reducing electromagnetic interference generated by the coil disc. This electromagnetic cooking utensil passes through conducting medium absorption and reflection electromagnetic interference signal to be connected through conducting medium and IGBT's emitter, make conducting medium and coil panel release the electric energy jointly, thereby make IGBT's on-time shorten, the electromagnetic interference who produces other devices in the electromagnetic cooking utensil diminishes.

In addition, the conductive medium in the embodiment is between the coil panel and the PCB board, or the conductive medium is between the coil panel and the base of the electromagnetic cooking appliance; the coil panel and the PCB are arranged side by side or up and down. In this embodiment, through setting up conductive medium between coil panel and PCB board, perhaps between coil panel and the base, can avoid the coil panel to the reverse heating of PCB board or base, simultaneously, conductive medium can absorb the magnetic leakage that the coil panel produced, also can reduce the magnetic leakage phenomenon of coil panel, has reduced the electromagnetic interference to electronic component.

On the basis of the above embodiment, as shown in fig. 9, at least a part of the conductive medium 30 is located between the coil disk 10 and the filter of the PCB board 20 for separating the coil disk 10 from the filter of the PCB board 20.

The PCB 20 has various electronic components, wherein the filter has important influence on the anti-interference performance of the electromagnetic cooking appliance, in order to reduce the electromagnetic interference of the coil panel 10 to the PCB 20, at least part of the conductive medium 30 is arranged between the coil panel 10 and the filter of the PCB 20, the reverse heating of the coil panel 10 to the filter of the PCB 20 is avoided, the magnetic leakage phenomenon of the coil panel 10 can also be reduced, and the electromagnetic interference to the filter is reduced.

Optionally, the filter device of the PCB 20 includes at least one of a differential mode inductor, a common mode inductor, a resistor, and a capacitor. In practical applications, a part of the conductive medium 30 may be disposed between the coil panel 10 and the filter of the PCB 20, or the whole conductive medium 30 may be disposed between the coil panel 10 and the filter of the PCB 20 according to a specific layout of the electromagnetic cooking appliance, which is not particularly limited in this embodiment.

Optionally, the conductive medium 30 overlaps the coil disk 10, and the overlapping area is less than one third of the area of the coil disk 10.

When the conductive medium 30 is disposed at the bottom of the coil disk 10, the conductive medium 30 may partially or entirely overlap the coil disk 10, and the larger the area where the conductive medium 30 overlaps the coil disk 10, the smaller the effect of the conductive medium 30 on reducing the electromagnetic interference of the coil disk 10.

However, in practical applications, considering factors such as the structural layout and the cost of the electromagnetic cooking appliance, the overlapping area of the conductive medium 30 and the coil panel 10 may be set to be less than one third of the area of the coil panel 10, for example, the conductive medium 30 is set at the bottom of the coil panel 10, the conductive medium 30 is attached to the coil panel 10, and the area of the conductive medium 30 is one fourth of the area of the coil panel 10, so that the electromagnetic interference generated by the coil panel 10 can be reduced through the conductive medium, and the factors such as the structural layout and the cost are comprehensively considered, thereby achieving a better comprehensive effect.

The embodiment provides an electromagnetic cooking appliance including: the method comprises the following steps: the coil panel, the PCB board and the conductive medium, the conductive medium is a non-magnetic material; the conductive medium is arranged outside the coil; the conductive medium is connected with an emitting electrode of an Insulated Gate Bipolar Transistor (IGBT) of the PCB; the conductive medium is used for reducing electromagnetic interference generated by the coil disc. This electromagnetic cooking utensil passes through conducting medium absorption and reflection electromagnetic interference signal to be connected through conducting medium and IGBT's emitter, make conducting medium and coil panel release the electric energy jointly, thereby make IGBT's on-time shorten, the electromagnetic interference who produces other devices in the electromagnetic cooking utensil diminishes. In addition, at least part of the conductive medium is located between the filter of the coil panel and the PCB in the embodiment and used for separating the filter of the coil panel and the PCB, and at least part of the conductive medium is arranged between the filter of the coil panel and the filter of the PCB, so that the conductive medium can avoid the coil panel from reversely heating the filter, the magnetic leakage phenomenon of the coil panel can be reduced, and the electromagnetic interference to the filter is reduced.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.

Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

In addition, each functional module in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules may be integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.

Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the embodiments described above may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. An electromagnetic cooking appliance, comprising: the coil panel (10), the PCB (20) and the conducting medium (30), wherein the conducting medium (30) is made of a non-magnetic material;

the conductive medium (30) is arranged outside the coil panel (10);

the conducting medium (30) is connected with an emitter electrode of an Insulated Gate Bipolar Transistor (IGBT) of the PCB (20); the conductive medium (30) is used for reducing electromagnetic interference generated by the coil disc (10).

2. The induction cooking appliance according to claim 1, wherein the conductive medium (30) is provided at a bottom and/or a peripheral side of the coil disk (10), and the conductive medium (30) covers a part or all of the coil disk (10).

3. The induction cooking appliance according to claim 2, wherein the conductive medium (30) and the coil disk (10) are bonded.

4. The induction cooking appliance according to claim 1, wherein the electrically conductive medium (30) is interposed between the coil disk (10) and the PCB board (20) or the electrically conductive medium (30) is interposed between the coil disk (10) and a base (40) of the induction cooking appliance.

5. The induction cooking appliance according to claim 4, wherein the coil disk (10) is arranged side by side or on top of the PCB board (20).

6. The electromagnetic cooking appliance according to claim 5, wherein at least part of the electrically conductive medium (30) is located between the coil disc (10) and the filter of the PCB board (20) for separating the coil disc (10) from the filter of the PCB board (20).

7. The electromagnetic cooking appliance of claim 6, wherein the filter device comprises at least one of a differential mode inductance, a common mode inductance, a resistance, and a capacitance.

8. The induction cooking appliance according to claim 6, wherein the conductive medium (30) overlaps the coil disk (10) with an overlapping area of less than one third of the area of the coil disk (10).

9. The electromagnetic cooking appliance according to any of the claims 1-8, wherein the electrically conductive medium (30) is a non-magnetically conductive metal sheet.

10. The electromagnetic cooking appliance of claim 9, wherein the metal sheet is a copper sheet or an aluminum sheet.