CN216521829U

CN216521829U - Electromagnetic range

Info

Publication number: CN216521829U
Application number: CN202122476784.3U
Authority: CN
Inventors: 孙云琨
Original assignee: BSH Electrical Appliances Jiangsu Co Ltd
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-05-13
Anticipated expiration: 2031-10-14

Abstract

One embodiment of the present invention relates to an induction cooker. The electromagnetic cooker comprises a casing and a coil assembly located in the casing, wherein the casing comprises a bottom casing, a panel installed above the bottom casing and covering the bottom casing, a circuit board located in the bottom casing and a power line electrically connected with the circuit board, the coil assembly comprises a coil and a metal supporting plate located below the coil, the metal supporting plate is used for supporting the coil and shielding electromagnetic signals, and the power line is located in the bottom casing and in a vertical downward projection range of the metal supporting plate. The possibility that the power line is interfered by a magnetic field can be reduced, and the possibility that the power line generates low-frequency noise due to the interference of the magnetic field is reduced, so that the conducted disturbance noise of the electromagnetic stove can be reduced, and the interference to an external power grid is reduced.

Description

Electromagnetic range

[ technical field ] A

The application relates to the field of induction cookers.

[ background ] A method for producing a semiconductor device

With the improvement of living standard, the electromagnetic range becomes an indispensable household appliance for people. However, long-time and short-distance operation is a unique characteristic of using the induction cooker by consumers in China, so more and more consumers and manufacturers begin to concern the problem of electromagnetic radiation of the induction cooker. When the induction cooker works, electromagnetic interference can be generated on other electrical equipment in the working environment, and the normal work of other equipment is influenced.

[ summary of the utility model ]

It is an object of an embodiment of the present invention to provide an improved induction cooker.

The embodiment of the utility model relates to an induction cooker. The electromagnetic cooker comprises a casing and a coil assembly located in the casing, wherein the casing comprises a bottom casing, a panel installed above the bottom casing and covering the bottom casing, a circuit board located in the bottom casing and a power line electrically connected with the circuit board, the coil assembly comprises a coil and a metal supporting plate located below the coil, the metal supporting plate is used for supporting the coil and shielding electromagnetic signals, and the power line is located in the bottom casing and in a vertical downward projection range of the metal supporting plate.

By adopting the structure, the metal supporting plate has the electromagnetic shielding effect, so that the metal supporting plate can shield the magnetic field generated when the coil is electrified. The power cord sets up in the projection range of metal sheet on vertical direction, can reduce the power cord and receive the possibility of magnetic field interference, reduces the power cord and produces the possibility of low frequency noise because of receiving magnetic field interference to, can reduce electromagnetic range conduction disturbance noise, reduce the interference to external electric wire netting, be favorable to passing through the EMC test.

According to an exemplary embodiment of the present invention, the power supply line is located below and covered by the metal supporting plate. This can reduce the possibility that the power line is disturbed by the magnetic field, and further reduce the possibility that the power line generates low frequency noise due to the disturbance of the magnetic field.

According to an exemplary embodiment of the present invention, the bottom case includes a bottom wall and a side wall connected to an edge of the bottom wall and perpendicular to the bottom wall, and the power line is located between the metal support plate and the bottom wall. The magnetic field interference possibility of the power line can be reduced, the power line can be accommodated conveniently, and the space utilization rate is improved.

According to an exemplary embodiment of the present invention, the power cord connector further includes a power cord inlet provided on the bottom case, and the power cord protrudes out of the bottom case through the power cord inlet. Therefore, one end of the power line, which is positioned in the shell, is connected with the circuit board, and one end of the power line, which is positioned outside the shell, extends into the shell through the power line inlet to be connected with the socket.

According to an exemplary embodiment of the present invention, the bottom case includes a bottom wall and a side wall connected to an edge of the bottom wall and perpendicular to the bottom wall, and the power line inlet is disposed on the bottom wall and located within a vertically downward projection range of the metal supporting plate. This can prevent the power cord from being affected by an electromagnetic field inside the housing.

According to an exemplary embodiment of the present invention, the housing is made of a metal material, and the power line is closely attached to a side of the housing facing the panel. Therefore, the bottom shell is grounded, noise can be effectively conducted by the bottom shell, and low-frequency noise of the power line is reduced.

According to an exemplary embodiment of the present invention, the bottom case includes a bottom wall and a sidewall connected to an edge of the bottom wall and perpendicular to the bottom wall, and a plurality of power line fixing devices for fixing a power line are disposed on the bottom wall. This can reduce the possibility of the power cord rattling.

According to an exemplary embodiment of the present invention, the power line fixing means includes a screw, a snap, an adhesive tape, or the like.

According to an exemplary embodiment of the utility model, the layout of the power supply lines on the bottom wall is a labyrinth layout. The power line can be better fixed by adopting the labyrinth layout, and the possibility of shaking of the power line is reduced.

According to an exemplary embodiment of the utility model, the metal support plate is made of aluminum. This may further reduce the possibility of the power line being disturbed by the magnetic field, since the aluminum material has a good electromagnetic shielding effect.

[ description of the drawings ]

Fig. 1 is a partially-structured perspective view of an induction cooker according to an embodiment of the present invention;

FIG. 2 is a perspective view of a portion of an induction cooker having a coil assembly partially removed in accordance with an embodiment of the present invention;

FIG. 3 is an exploded view of a coil assembly according to one embodiment of the present invention;

reference numerals:

bottom wall 11 and side wall 12 of bottom shell 10 of casing 100

Circuit board 30 power cord 40 coil assembly 20 coil 21

Metal support plate 22

[ detailed description ] embodiments

In order to further understand the objects, structures, features and functions of the present application, the following embodiments are described in detail.

When the electromagnetic stove is electrified, the coil can generate a high-frequency alternating magnetic field, and according to the electromagnetic induction theory, the power line is exposed in the magnetic field to generate induced electromotive force or induced current. This causes the rise of low-frequency noise in disturbance, which may harm the power grid or other electrical appliances, and affect the electromagnetic cooker to pass the EMC test. The application provides a corresponding technical scheme based on the method.

As shown in fig. 1 and 2, the electromagnet includes a housing 100 and various electrical components located within the housing 100. The various electrical devices may include the coil assembly 20, the circuit board 30, and the power cord 40 connected to the circuit board 30, among others.

The cabinet 100 includes a bottom case 10 and a panel (not shown) located above the bottom case 10, the panel being generally plate-shaped and made of a glass-ceramic material to cover an upper portion of the bottom case 10. In use, the cooktop to be heated is placed over the panel.

The bottom case 10 includes a bottom wall 11 and 4 side walls 12 connected to edges of the bottom wall 11 and perpendicular to the bottom wall 11, and the bottom case 10 is made of a metal material. The bottom wall 11 and the 4 side walls 12 together define a space for receiving various electrical devices.

As shown in fig. 3, the coil assembly 20 includes a coil 21 and a metal support plate 22 located below the coil, the metal support plate 22 being used to support the coil 21 and shield electromagnetic signals. The coil assembly 20 further includes a magnet between the coil 21 and the metal support plate 22 to focus the magnetic field.

As shown in fig. 1, the power supply line 40 is located below the metal support plate 22 and covered by the metal support plate 22, and the power supply line 40 is within a vertically downward projection range of the metal support plate 22. This can reduce the possibility that power cord 40 receives the magnetic field interference, reduces the possibility that power cord 40 produces the low frequency noise because of receiving the magnetic field interference to, thus, can reduce electromagnetic range conduction disturbance noise, reduce the interference to external electric wire netting, be favorable to passing EMC test.

The power cord 40 is located between the metal support plate 22 and the bottom wall 11 of the bottom case 10. Because the bottom case 10 is made of metal material, the bottom case 10 also has a certain electromagnetic shielding effect, and the power line 40 is located between the metal supporting plate 22 and the bottom wall 11 made of metal, so that the possibility that the power line 40 is interfered by a magnetic field can be better reduced, and further, the possibility that the power line 40 generates low-frequency noise due to the interference of the magnetic field can be reduced.

The circuit board 30 is electrically connected to a power cord 40, and one end of the power cord 40 is connected to the circuit board 30 and the other end is connected to the socket. A power cord inlet is formed on the bottom wall 11 of the bottom case 10, and the power cord 40 may extend out of the bottom case 10 through the power cord inlet.

In the present embodiment, the power line inlet is provided in the bottom wall 11, and the power line inlet is located within a downward projection range of the metal support plate 22. This can avoid the power supply line 40 from reaching a range outside the shield magnetic field of the metal support plate 22.

The power cord 40 is closely attached to the side of the bottom case 10 facing the panel. In this embodiment, the power cord 40 is attached to the side of the bottom wall 11 facing the panel. Since the bottom case 10 is grounded, it can effectively conduct noise, reducing low frequency noise of the power line 40.

Fig. 2 is a view after the coil assembly is removed. As shown in fig. 2, the layout of the power cord 40 on the bottom wall 11 is a labyrinth layout. A plurality of power cord fixing devices 50 for fixing the power cord 40 are provided on the bottom wall 11, and the power cord 40 is arranged on the bottom wall 11 in a labyrinth manner by the power cord fixing devices 50.

The power cord fixing device 50 may include a screw, a snap, a slot, or an adhesive tape. In one embodiment, a labyrinth-type slot is formed in the bottom wall 11 to clamp the power cord 40 in the slot, which can fix the power cord 40 well and reduce the possibility of the power cord 40 shaking.

The various embodiments described in connection with fig. 1-3 may be combined with each other in any given way to achieve the advantages of the utility model. In addition, the present invention is not limited to the illustrated embodiments, and other means than those shown may be generally used as long as the same effects are obtained.

Claims

1. An induction cooker comprising a casing (100) and a coil assembly (20) located inside the casing (100), said casing (100) comprising a bottom shell (10) and a panel mounted above the bottom shell (10) and covering said bottom shell (10), a circuit board (30) located inside the bottom shell (10) and a power supply line (40) electrically connected to the circuit board (30), said coil assembly (20) comprising a coil (21) and a metal support plate (22) located below the coil (21), said metal support plate (22) being intended to support said coil (21) and shield electromagnetic signals, characterized in that said power supply line (40) is located inside said bottom shell (10) and within a vertical downward projection of said metal support plate (22).

2. The induction cooker according to claim 1, characterized in that said power supply line (40) is located below said metal support plate (22) and covered by said metal support plate (22).

3. The induction cooker according to claim 1, characterized in that said bottom shell (10) comprises a bottom wall (11) and a side wall (12) connected to the edge of said bottom wall (11) and perpendicular to said bottom wall (11), said power supply line (40) being located between said metal support plate (22) and said bottom wall (11).

4. The induction cooker according to claim 1, further comprising a power cord inlet provided on the bottom case (10), through which the power cord (40) protrudes out of the bottom case (10).

5. The induction cooker according to claim 3, characterized in that said power line (40) inlet is arranged in said bottom wall (11) and within the vertical downward projection of said metal support plate (22).

6. The induction hob according to claim 1, characterized in, that the bottom shell (10) is made of a metal material, the power line (40) clings to a side of the bottom shell (10) facing the panel.

7. The induction cooker according to claim 1, wherein the bottom case (10) comprises a bottom wall (11) and a side wall (12) connected to an edge of the bottom wall (11) and perpendicular to the bottom wall (11), and the bottom wall (11) is provided with a plurality of power cord fixing devices (50) for fixing the power cord (40).

8. The induction cooker according to claim 7, characterized in that said power cord fixing means (50) comprises screws, snaps, slots or adhesive tape.

9. The induction hob according to claim 7, characterized in, that the layout of the power lines (40) on the bottom wall (11) is a labyrinth layout.

10. The induction hob according to claim 1, characterized in, that the metal support plate (22) is made of aluminium.