CN220368823U

CN220368823U - Coil panel

Info

Publication number: CN220368823U
Application number: CN202322067164.3U
Authority: CN
Inventors: 黎振豪; 吴启航
Original assignee: Guangdong Aotelong Group Co ltd
Current assignee: Guangdong Aotelong Group Co ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2024-01-19
Anticipated expiration: 2033-08-02

Abstract

The utility model discloses a coil panel, which comprises a metal coil assembly, a magnetic stripe group and an aluminum plate, wherein the metal coil assembly, the magnetic stripe group and the aluminum plate are sequentially arranged and fixed from top to bottom, the coil panel also comprises a shielding piece, the shielding piece is arranged on the metal coil assembly, the metal coil assembly comprises a circular coil and a rectangular coil, the circular coil is arranged in the rectangular coil, the coil panel can reduce mutual interference between electromagnetic coils, reduce external electromagnetic radiation so as to reduce noise, is more beneficial to passing EMC test, and simultaneously avoids physical injury to a user.

Description

Coil panel

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a coil panel.

Background

At present, the common operating principle of the induction cooker on the market is as follows: when the stove surface is placed at the bottom of the iron-containing pot, alternating magnetic force lines are cut by the pot to generate alternating current (namely vortex) at the metal part at the bottom of the pot, the vortex enables iron molecules of the pot to move at random at high speed, and the molecules collide and rub with each other to generate heat energy, so that the iron pot self heats at high speed and is used for heating and cooking food, and the purpose of cooking is achieved.

The metal coil of a common electromagnetic heating coil panel is a single coil panel, but the effective magnetic field coverage rate of the single coil panel is low, and the problems of low heating power, uneven heating, magnetic leakage and the like exist, so that the coil panels of a plurality of coils are generated, but the coil panels mutually interfere between electromagnetic fields to generate larger noise, larger electromagnetic radiation is caused to the outside, and the electromagnetic compatibility (EMC) test is difficult to pass.

Disclosure of Invention

The present utility model is directed to a coil panel for solving the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a coil panel, includes metal coil assembly, magnetic stripe group and aluminum plate, metal coil assembly the magnetic stripe group with aluminum plate is arranged in proper order by last down fixedly, the coil panel still includes the shield, the shield is located on the metal coil assembly, the metal coil assembly includes circular coil and rectangular coil, circular coil set up in the rectangular coil.

Further, the shield is an aluminum ring.

Further, the turns ratio of the circular coil to the rectangular coil is 21:8.

further, the distance between the shield and the metal coil assembly ranges: 1-6 mm.

Further, the shielding part comprises a shielding part and a metal coil assembly, and the shielding part comprises a magnetic strip group and a shielding part, wherein the shielding part is arranged on the shielding part, the shielding part is arranged on the magnetic strip group, and the shielding part is arranged on the magnetic strip group.

Compared with the prior art, the coil panel has the following beneficial effects: through setting up circular coil in rectangular coil to place circular coil and rectangular coil top with the aluminium circle as the shield, the good shielding performance of aluminium circle can reduce coil panel to external electromagnetic interference, through setting up the distance of aluminium circle and the turns ratio of circular coil and rectangular coil, can reduce mutual interference between the electromagnetic coil, thereby reduce noise reduction to external electromagnetic radiation, more be favorable to passing EMC test, avoid causing the bodily injury to the user simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the utility model, without affecting the effect or achievement of the objective.

FIG. 1 is a schematic cross-sectional view of a coil disk of the present utility model;

FIG. 2 is an enlarged partial schematic view of the coil disk a shown in FIG. 1;

FIG. 3 is a schematic view of a metal coil assembly according to the present utility model;

in the figure: 1 metal coil component, 2 magnetic stripe group, 3 aluminum plate, 4 shielding piece, 5 first mica sheet, 6 second mica sheet, 11 rectangular coil, 12 circular coil.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the embodiments described below are only some embodiments of the present utility model, not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Referring to fig. 1-3, the present utility model provides a technical solution:

the utility model provides a coil panel, includes metal coil assembly 1, magnetic stripe group 2 and aluminum plate 3, metal coil assembly 1 magnetic stripe group 2 with aluminum plate 3 is from top to bottom arranged in proper order fixedly, the coil panel still includes shield 4, shield 4 locates on the metal coil assembly 1, metal coil assembly 1 includes circular coil 12 and rectangular coil 11, circular coil 12 set up in the rectangular coil 11, rectangular coil 11 connects circular coil 12 to encircle circular coil 12 setting.

If the whole coil adopts circular windings, the magnetic field at the corners of the coil is relatively smaller than the magnetic field at the center of the coil, so that the electromagnetic field generated by the whole coil is not uniform enough, the heating effect of the to-be-heated device is possibly influenced, the whole coil adopts square windings, the whole volume and the weight of the coil are large, the design is inconvenient to lighten, the production cost of the coil panel is increased, the volume and the weight of the coil body can be effectively reduced by adopting a mode that the rectangular coil 11 surrounds the circular coil 12, the production cost of the coil panel is favorably reduced, the magnetic field at the corners of the circular coil 12 can be improved under the action of the rectangular coil 11, the electromagnetic field of the whole coil is more uniform, the heating efficiency and the heating area of the to-be-heated device are favorably improved, the heating of the to-be-heated device can be more uniform, and the heating effect of the metal coil assembly 1 is improved; meanwhile, when a single coil is used, a plurality of coils are often needed to be combined, mutual interference among electromagnetic coils is obvious, noise is high, and the mutual interference among the electromagnetic coils can be reduced to a great extent through the structure, so that noise is reduced.

The aluminum material has good electromagnetic shielding effect, and the aluminum coil serving as the shielding piece 4 is arranged above the coil panel, and the aluminum plate 3 is arranged below the coil panel, so that the coil body of the induction cooker radiation source can be isolated, electromagnetic leakage of the coil body is reduced, radiation of the induction cooker is reduced, the problem that a magnetic field generated by a coil of the conventional induction cooker cannot be completely absorbed by a cooker, part of the magnetic field can leak outwards, noise is generated, and meanwhile, body injury is caused to a user is solved.

Further, the turns ratio of the circular coil 12 to the rectangular coil 11 is 21:8, see table 1, through setting up different coil turns ratios and carrying out many comparison experiments, test the electromagnetic noise intensity of peripheral different point positions of coil panel to the sound power level is as evaluation index, obtains comprehensive sound power level through noise processing system, and it can be seen that when the turns ratio of circular coil 12 and rectangular coil 11 is 21: and 8, the comprehensive sound power level is the lowest, the generated electromagnetic noise is the smallest, and the electromagnetic noise is in direct proportion to the electromagnetic interference quantity, so that the electromagnetic interference quantity and the electromagnetic radiation to the outside are the smallest at the moment, and the EMC test is more facilitated.

Table 1: noise data of the circular coil and the rectangular coil with different turns ratios;

further, the distance between the shield 4 and the metal coil assembly 1 ranges: 1-6 mm, through setting up the different distances between shield 4 and the metal coil subassembly 1 and carrying out many times experiment contrast, test the electromagnetic noise intensity of peripheral different point positions of coil panel, regard sound power level as evaluation index, obtain comprehensive sound power level through noise processing system, comprehensive sound power level is lower when the distance between shield 4 and the metal coil subassembly 1 is 1-6 mm, the electromagnetic noise that produces is less, see table 2, because electromagnetic noise is proportional with electromagnetic interference volume, therefore electromagnetic interference volume and to external electromagnetic radiation also less, more be favorable to passing EMC test.

Table 2: noise data for different distances between the shield and the metal coil assembly of the present utility model.

Further, the shielding device further comprises a first mica sheet 5 and a second mica sheet 6, as shown in fig. 2, wherein the first mica sheet 5 is arranged between the shielding piece 4 and the metal coil assembly 1, and the second mica sheet 6 is arranged between the metal coil assembly 1 and the magnetic stripe group 1.

The mica sheet has good electrical property and mechanical property, large volume resistivity, good dielectric loss, good heat resistance, good chemical stability, dust prevention, oil smoke prevention, high temperature resistance and no microwave obstruction.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The utility model provides a coil panel, includes metal coil assembly, magnetic stripe group and aluminum plate, metal coil assembly the magnetic stripe group with aluminum plate is arranged fixedly from top to bottom in proper order, its characterized in that, the coil panel still includes the shield, the shield is located on the metal coil assembly, the metal coil assembly includes circular coil and rectangular coil, circular coil set up in the rectangular coil.

2. The coil disk of claim 1, wherein the shield is an aluminum ring.

3. The coil disk of claim 1, wherein the turns ratio of the circular coil to the rectangular coil is 21:8.

4. a coil disc according to claim 1, characterized in that the distance between the shield and the metal coil assembly is in the range of 1-6 mm.

5. The coil disk of claim 1, further comprising a first mica sheet and a second mica sheet, the first mica sheet disposed between the shield and the metallic coil assembly, the second mica sheet disposed between the metallic coil assembly and the magnetic stripe group.