A magnetic strip and magnetic strip assembly structure and a rice cooker

Abstract

This invention provides a magnetic strip, a magnetic strip assembly structure, and a rice cooker. By controlling the thickness of the first thick magnetic strip to be greater than the thickness of the second thick magnetic strip, the portion of the magnetic strip corresponding to the first main magnetic strip can withstand a greater magnetic flux density. When the magnetic strip is installed on the coil, the magnetic flux density of the coil portion corresponding to the first thick magnetic strip is even greater. According to Gauss's law, a greater magnetic flux can be generated, thereby more effectively improving the heating efficiency of the bottom of the cooker. At the same time, since the thickness of the first thick magnetic strip is greater than that of the second thick magnetic strip, when the total volume of the thick magnetic strip is inconvenient, part of the thickness of the second thick magnetic strip can be transferred to the first thick magnetic strip, thereby effectively increasing the utilization efficiency of the thick magnetic strip itself without changing the material usage.

Description

Technical Field

[0001] This invention relates to the field of rice cooker technology, and more specifically to a magnetic strip used in rice cookers. Background Technology

[0002] For IH rice cookers, heating is typically achieved through electromagnetic induction between the pot and the coil. The working principle is that when an electric current passes through the coil, it generates an alternating magnetic field around the coil wires. When a magnetic metal pot is placed on the cooktop, the magnetic lines of force pass through the pot, generating eddy currents and thus producing eddy current heat, which heats the food in the pot.

[0003] Existing rice cookers all incorporate a magnetic strip beneath the coil. This high-permeability magnetic strip can concentrate the dispersed magnetic lines of force from the coil, increasing the magnetic field strength acting on the pot and thus improving heating efficiency. Current magnetic strips are typically rectangular. However, due to the uneven distribution of magnetic lines of force at the bottom of the coil, rectangular strips cannot effectively concentrate the magnetic lines of force at the bottom of the pot, resulting in energy waste and low overall utilization of the magnetic strip.

[0004] Therefore, existing technology provides an anisotropic magnetic strip, which modifies the magnetic strip to a spliced ​​type, such as... Figure 1 As shown, the heterogeneous magnetic strip itself is made of a "T" shaped structure. However, after the magnetic strip with the above structure is assembled with the coil, there is still a problem of low heating efficiency. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of low heating efficiency in rice cookers using heterogeneous magnetic strips in the prior art.

[0006] To this end, the present invention provides a magnetic strip, comprising: a main magnetic strip, the main magnetic strip including a first main magnetic strip and a second main magnetic strip connected to each other; and a thick magnetic strip disposed on the main magnetic strip, the thick magnetic strip including a first thick magnetic strip and a second thick magnetic strip, the first thick magnetic strip being disposed on the first main magnetic strip and the second thick magnetic strip being disposed on the second main magnetic strip; the thickness of the first thick magnetic strip is greater than the thickness of the second thick magnetic strip.

[0007] The magnetic strip provided by the present invention has the first thick magnetic strip disposed below the first main magnetic strip.

[0008] The magnetic strip provided by the present invention has a linear decrease in thickness between the first thick magnetic strip and the second thick magnetic strip along the direction from the first main magnetic strip to the second main magnetic strip.

[0009] The magnetic strip provided by the present invention has a smooth connection at the junction of the first thick magnetic strip and the second thick magnetic strip.

[0010] The magnetic strip provided by the present invention includes an upper thick magnetic strip and a lower thick magnetic strip, wherein the upper thick magnetic strip and the lower thick magnetic strip are respectively disposed on the upper surface and the lower surface of the first main magnetic strip.

[0011] The magnetic strip provided by this invention has a second thicker portion with a thickness of 0.

[0012] The magnetic strip provided by the present invention has a first main magnetic strip with an area larger than the second main magnetic strip.

[0013] The magnetic strip provided by the present invention further includes end magnetic strips, which are disposed at both ends of the main magnetic strip and connected to the main magnetic strip at a certain angle. The end magnetic strips include a first end magnetic strip and a second end magnetic strip. The first end magnetic strip is connected to the first main magnetic strip, and the second end magnetic strip is connected to the second main magnetic strip.

[0014] The magnetic strip provided by the present invention has a sum of areas of the first end magnetic strip and the first main magnetic strip that is greater than the sum of areas of the second end magnetic strip and the second main magnetic strip.

[0015] The magnetic strip provided by the present invention has the same size at the corresponding parts of the first main magnetic strip and the first end magnetic strip, and / or at the corresponding parts of the second main magnetic strip and the second end magnetic strip.

[0016] The magnetic strip provided by the present invention has at least one of the first main magnetic strip and the second main magnetic strip arranged in a rectangular shape.

[0017] The magnetic strip provided by the present invention has a main magnetic strip arranged in a "T" shape.

[0018] The magnetic strip provided by the present invention has at least one of the first main magnetic strip and the second main magnetic strip arranged in a trapezoidal shape.

[0019] This invention also provides a magnetic strip assembly structure, comprising: a coil arranged in a ring; a magnetic strip provided by this invention, wherein a first end magnetic strip is disposed at the center of the coil, and a second end magnetic strip is disposed at the outer circumference of the coil, and the coil is sandwiched between the first end magnetic strip and the second end magnetic strip; and a coil disk disposed between the magnetic strip and the coil, the coil disk comprising: a winding slot adapted to fix the coil; and a magnetic strip slot disposed opposite to the winding slot, adapted to fix the magnetic strip.

[0020] Several magnetic strips are arranged in a radial pattern with the center of the coil as the center.

[0021] The present invention also provides a rice cooker, including the magnetic strip provided by the present invention or the magnetic strip assembly structure provided by the present invention.

[0022] The technical solution of this invention has the following advantages:

[0023] 1. The magnetic strip provided by the present invention includes a thick magnetic strip disposed on the main magnetic strip. The thick magnetic strip includes a first thick magnetic strip and a second thick magnetic strip. The first thick magnetic strip is disposed on the first main magnetic strip, and the second thick magnetic strip is disposed on the second main magnetic strip. The thickness of the first thick magnetic strip is greater than the thickness of the second thick magnetic strip.

[0024] By controlling the thickness of the first thick magnetic strip to be greater than the thickness of the second thick magnetic strip, the part of the magnetic strip corresponding to the first main magnetic strip can withstand more magnetic flux density. When the magnetic strip is installed on the coil, the magnetic flux density of the coil part corresponding to the first thick magnetic strip is greater. At this time, according to Gauss's law, a greater magnetic flux can be generated, which can more effectively improve the heating efficiency of the bottom of the pot.

[0025] Meanwhile, since the thickness of the first thick magnetic strip is greater than that of the second thick magnetic strip, when the total volume of the thick magnetic strip is inconvenient, part of the thickness of the second thick magnetic strip can be transferred to the first thick magnetic strip, thereby effectively increasing the utilization efficiency of the thick magnetic strip itself without changing the material. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the magnetic strip provided in the background art of this invention;

[0028] Figure 2 This is a schematic diagram of the structure of the first type of magnetic strip provided in Example 1;

[0029] Figure 3 This is a side view of the first type of magnetic strip provided in Example 1;

[0030] Figure 4 This is a schematic diagram of the structure of the second type of magnetic strip provided in Example 1;

[0031] Figure 5 This is a schematic diagram of the structure of the second type of magnetic strip provided in Example 1;

[0032] Figure 6 This is a schematic diagram of the structure of the third type of magnetic strip provided in Example 1;

[0033] Figure 7 This is a schematic diagram showing the distribution of multiple magnetic strips in the magnetic strip assembly structure provided in Example 2;

[0034] Figure 8 This is a schematic diagram of the distribution of another type of magnetic strips in the magnetic strip assembly structure provided in Example 2;

[0035] Figure 9 This is a schematic diagram of the assembly between the magnetic strip and the coil provided in Example 2;

[0036] Figure 10 This is a schematic diagram of the coil disk provided in Example 2.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Main magnetic strip; 11-First main magnetic strip; 12-Second main magnetic strip; 2-First thick magnetic strip; 3-Lower thick magnetic strip; 41-First end magnetic strip; 42-Second end magnetic strip; 5-Second thick magnetic strip; 6-Coil; 7-Winding slot; 8-Magnetic strip slot. Detailed Implementation

[0039] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Example 1

[0044] This embodiment provides a magnetic strip, such as Figures 1-6 As shown, it includes:

[0045] The main magnetic strip 1 includes a first main magnetic strip 11 and a second main magnetic strip 12 connected to each other. In a preferred embodiment, the first main magnetic strip 11 and the second main magnetic strip 12 are integrally formed.

[0046] A thick magnetic strip is disposed on the main magnetic strip. The thick magnetic strip includes a first thick magnetic strip 2 and a second thick magnetic strip 5. The first thick magnetic strip 2 is disposed on the first main magnetic strip, and the second thick magnetic strip 5 is disposed on the second main magnetic strip 12. Specifically, the first thick magnetic strip 2 and the second thick magnetic strip 5 can be disposed separately or integrally. When disposed separately, the first thick magnetic strip 2 and the second thick magnetic strip 5 can be disposed adjacent to each other or separated by a certain gap.

[0047] In this embodiment, the thickness of the first thick magnetic strip 2 is greater than the thickness of the second thick magnetic strip 5. Specifically, as shown... Figure 1 As shown, the thickness of the first thick magnetic strip 2 or the second thick magnetic strip 5 refers to the dimension extending downwards.

[0048] By controlling the thickness of the first thick magnetic strip 2 to be greater than the thickness of the second thick magnetic strip 5, the part of the magnetic strip corresponding to the first main magnetic strip 11 can withstand a greater magnetic flux density. When the magnetic strip is installed on the coil 6, the magnetic flux density of the part of the coil 6 corresponding to the first thick magnetic strip 2 is greater. At this time, according to Gauss's law, a greater magnetic flux can be generated, which can more effectively improve the heating efficiency of the bottom of the pot. At the same time, since the thickness of the first thick magnetic strip 2 is greater than the thickness of the second thick magnetic strip 5, when the total volume of the thick magnetic strip is inconvenient, part of the thickness of the second thick magnetic strip 5 can be transferred to the first thick magnetic strip 2, thereby effectively increasing the utilization efficiency of the thick magnetic strip itself without changing the material.

[0049] In this embodiment, the first thick magnetic strip 2 is disposed below the first main magnetic strip 11. The upper part of the first main magnetic strip 11 is located on the side that contacts the coil 6, and the lower part of the first main magnetic strip 11 is located on the side away from the coil 6.

[0050] In this embodiment, the shapes of the first thick magnetic strip 2 and the second thick magnetic strip 5 are not strictly limited; they can be regular or irregular shapes. For example, the first thick magnetic strip 2 and the second thick magnetic strip 5 can be arranged in a wavy shape or in a cube shape.

[0051] Specifically, as one implementation, the thickness of the first thick magnetic strip 2 and the second thick magnetic strip 5 decreases linearly along the direction from the first main magnetic strip 11 to the second main magnetic strip. When the first thick magnetic strip 2 and the second thick magnetic strip 5 are separated from each other, the first thick magnetic strip 2 and the second thick magnetic strip 5 can be two independent structures, such as the first thick magnetic strip 2 being trapezoidal and the second thick magnetic strip 5 being triangular; or the second thick magnetic strip 5 being trapezoidal and the first thick magnetic strip 2 being triangular. Alternatively, the first thick magnetic strip 2 and the second thick magnetic strip 5 can be controlled to have the same shape, such as both being trapezoidal or triangular, in which case the first thick magnetic strip 2 and the second thick magnetic strip 5 can themselves adopt similar shapes. In this embodiment, as a preferred implementation, the first thick magnetic strip 2 and the second thick magnetic strip 5 have a continuous transition, such as... Figure 6 As shown, the connection between the first thick magnetic strip 2 and the second thick magnetic strip 5 is smooth. This arrangement results in the thick magnetic strips being arranged in a wedge shape or a triangular shape.

[0052] As another implementation method, such as Figure 4 As shown, in this embodiment, the first thick magnetic strip 2 includes an upper thick magnetic strip and a lower thick magnetic strip 3, which are respectively disposed on the upper surface and the lower surface of the first main magnetic strip 11.

[0053] With the above-described arrangement, the first thick magnetic strip 2 can wrap around the first main magnetic strip 11. In a preferred embodiment, the first main magnetic strip 11 is positioned at the center of the first thick magnetic strip 2.

[0054] In this embodiment, as a preferred implementation method, such as Figure 3 As shown, only the first thick magnetic strip 2 is controlled to have a certain thickness, while the thickness of the second thick magnetic strip 5 is controlled to be 0. Specifically, the first thick magnetic strip 2 itself can be arranged in a regular shape, such as a cube or a semi-circular shape. The specific shape is not limited in this embodiment.

[0055] In this embodiment, the area of ​​the first main magnetic strip 11 is larger than the area of ​​the second main magnetic strip 12. By controlling the area of ​​the first main magnetic strip 11 to be larger than the area of ​​the second main magnetic strip 12, and simultaneously controlling the thickness of the first thick magnetic strip 2 to be greater than the thickness of the second thick magnetic strip 5, the portion of the magnetic strip located on the first main magnetic strip 11 can have a greater magnetic flux density. Consequently, when this portion of the first main magnetic strip 11 comes into contact with the coil 6, which has a higher magnetic flux density, a greater magnetic flux can be generated, thereby effectively improving the utilization efficiency of the magnetic strip. Furthermore, by controlling the area of ​​the first main magnetic strip 11 to be larger than the area of ​​the second main magnetic strip 12, a greater magnetic flux density can be obtained on the first main magnetic strip 11, given the limited overall area of ​​the main magnetic strip 1, thus achieving efficient utilization of the magnetic strip.

[0056] Furthermore, the magnetic strip provided in this embodiment, such as Figure 2 As shown, it also includes end magnetic strips, which are disposed at both ends of the main magnetic strip 1 and connected to the main magnetic strip 1 at a certain angle. The end magnetic strips include a first end magnetic strip 41 and a second end magnetic strip 42. The first end magnetic strip 41 is connected to the first main magnetic strip 11, and the second end magnetic strip 42 is connected to the second main magnetic strip 12.

[0057] By supplementing the first end magnetic strip 41 and the second end magnetic strip 42, during use, the first end magnetic strip 41 and the second end magnetic strip 42 are located on the inner and outer sides of the coil 6. For the coil 6, the density of the closed magnetic field lines located on the outer side of the coil 6 is less than the density of the closed magnetic field lines located on the inner side of the coil 6. Through the above arrangement, the magnetic flux density corresponding to the outside of the coil 6 is less than the magnetic flux density corresponding to the inside of the coil 6, thereby making full use of the closed magnetic field lines.

[0058] In this embodiment, the sum of the areas of the first end magnetic strip 41 and the first main magnetic strip 11 is greater than the sum of the areas of the second end magnetic strip 42 and the second main magnetic strip 12. This arrangement ensures a larger magnetic flux density within and near the inner side of the coil 6, thereby maximizing the utilization of the closed magnetic lines of force generated by the coil 6. Furthermore, this arrangement increases the overall magnetic flux density of the magnetic strip while maintaining its total volume, thereby enhancing its ability to gather closed magnetic lines of force.

[0059] In this embodiment, the dimensional relationship between the first end magnetic strip 41 and the first main magnetic strip 11, and the dimensional relationship between the second end magnetic strip 42 and the second main magnetic strip 12, are not overly limited. As a preferred embodiment, the corresponding portions of the first main magnetic strip 11 and the first end magnetic strip 41, and / or the corresponding portions of the second main magnetic strip 12 and the second end magnetic strip 42, are of equal size. As a variation, the two ends of the first end magnetic strip 41 protrude beyond the first main magnetic strip 11, and the two ends of the second end magnetic strip 42 protrude beyond the second main magnetic strip 12.

[0060] In this embodiment, at least one of the first main magnetic strip 11 and the second main magnetic strip 12 is rectangular. In the most preferred embodiment, the main magnetic strip 1 is T-shaped.

[0061] As a variation, the first main magnetic strip 11 and the second main magnetic strip 12 can also be set in irregular shapes, such as wavy shapes, etc., which are not limited in this embodiment.

[0062] As another implementation method, in this embodiment, such as Figure 5 As shown, at least one of the first main magnetic strip 11 and the second main magnetic strip 12 is arranged in a trapezoidal shape. In a preferred embodiment, both the first main magnetic strip 11 and the second main magnetic strip 12 are arranged in a trapezoidal shape, in which case the long sides of the two trapezoids are connected to each other.

[0063] Example 2

[0064] This embodiment provides a magnetic stripe assembly structure, such as... Figure 9 As shown, it includes: a coil 6 arranged in a ring shape; a magnetic strip provided in Embodiment 1, wherein the first end magnetic strip 41 of the magnetic strip is disposed at the center of the coil 6, and the second end magnetic strip 42 is disposed at the outer circumference of the coil 6, and the coil 6 is sandwiched between the first end magnetic strip 41 and the second end magnetic strip 42.

[0065] In this embodiment, in order to achieve a stable connection between the coil 6 and the magnetic strip, a coil 6 disc is provided between the coil 6 and the magnetic strip, such as... Figure 10 As shown, the coil 6 has a winding slot 7 and a magnetic strip slot 8. The winding slot 7 is used to fix the coil 6 and includes multiple protrusions arranged side by side. The coil 6 is disposed in the gap between two adjacent protrusions. The magnetic strip slot 8 is used to fix the coil 6. Specifically, the magnetic strip slot 8 has inwardly extending claws, which fix the magnetic strip.

[0066] Specifically, several magnetic strips are arranged in a radial pattern with the center of the coil 6 as the center. The magnetic strips located at the center of the coil 6 have a higher magnetic flux density, which can make full use of the denser closed magnetic lines of force at the center of the coil 6.

[0067] There is no limit to the number of magnetic strips, such as Figure 8 As shown, it can be 6 or any other number.

[0068] Example 3

[0069] This embodiment provides a rice cooker, including the magnetic strip provided in Embodiment 1 or the magnetic strip assembly structure provided in Embodiment 2.

[0070] Specifically, the rice cooker includes an inner pot, through which cooking is performed. A snap-fit ​​part is provided on the bottom outer side of the inner pot, and the coil itself is wound around the snap-fit ​​part.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A magnetic strip assembly structure, characterized in that, The magnetic strip includes: The main magnetic strip (1) includes a first main magnetic strip (11) and a second main magnetic strip (12) connected to each other; A thick magnetic strip is disposed on the main magnetic strip (1). The thick magnetic strip includes a first thick magnetic strip (2) and a second thick magnetic strip (5). The first thick magnetic strip (2) is disposed on the first main magnetic strip (11), and the second thick magnetic strip (5) is disposed on the second main magnetic strip (12). The thickness of the first thick magnetic strip (2) is greater than the thickness of the second thick magnetic strip (5); The end magnetic strips are disposed at both ends of the main magnetic strip (1) and connected to the main magnetic strip (1) at a certain angle. The end magnetic strips include a first end magnetic strip (41) and a second end magnetic strip (42). The first end magnetic strip (41) is connected to the first main magnetic strip (11), and the second end magnetic strip (42) is connected to the second main magnetic strip (12). The magnetic stripe assembly structure includes: The coil (6) is arranged in a ring shape; The magnetic strip has a first end magnetic strip (41) disposed at the center of the coil (6) and a second end magnetic strip (42) disposed at the outer circumference of the coil (6). The coil (6) is sandwiched between the first end magnetic strip (41) and the second end magnetic strip (42). Without changing the total volume of the thick magnetic strip, a portion of the thickness of the second thick magnetic strip (5) is transferred to the first thick magnetic strip (2).

2. The magnetic strip assembly structure according to claim 1, characterized in that, Along the direction from the first main magnetic strip (11) to the second main magnetic strip (12), the thickness of the first thick magnetic strip (2) and the second thick magnetic strip (5) decreases linearly.

3. The magnetic strip assembly structure according to claim 2, characterized in that, The first thick magnetic strip (2) and the second thick magnetic strip (5) are smoothly connected at the joint.

4. The magnetic strip assembly structure according to claim 1, characterized in that, The first thick magnetic strip (2) includes an upper thick magnetic strip and / or a lower thick magnetic strip (3), wherein the upper thick magnetic strip and the lower thick magnetic strip (3) are respectively disposed on the upper surface and the lower surface of the first main magnetic strip (11).

5. The magnetic strip assembly structure according to any one of claims 1-2, characterized in that, The thickness of the second thick magnetic strip (5) is 0.

6. The magnetic strip assembly structure according to claim 1, characterized in that, The area of ​​the first main magnetic strip (11) is larger than the area of ​​the second main magnetic strip (12).

7. The magnetic strip assembly structure according to claim 1, characterized in that, The sum of the areas of the first end magnetic strip (41) and the first main magnetic strip (11) is greater than the sum of the areas of the second end magnetic strip (42) and the second main magnetic strip (12).

8. The magnetic strip assembly structure according to claim 7, characterized in that, The dimensions of the parts of the first main magnetic strip (11) corresponding to the first end magnetic strip (41) and / or the parts of the second main magnetic strip (12) corresponding to the second end magnetic strip (42) are equal.

9. The magnetic strip assembly structure according to claim 8, characterized in that, At least one of the first main magnetic strip (11) and the second main magnetic strip (12) is arranged in a rectangular shape.

10. The magnetic strip assembly structure according to claim 9, characterized in that, The main magnetic strip (1) is arranged in a "T" shape.

11. The magnetic strip assembly structure according to claim 8, characterized in that, At least one of the first main magnetic strip (11) and the second main magnetic strip (12) is arranged in a trapezoidal shape.

12. The magnetic strip assembly structure according to claim 1, characterized in that, Several magnetic strips are arranged in a radial pattern with the center of the coil (6) as the center.

13. The magnetic strip assembly structure according to claim 1 or 12, characterized in that, Also includes: A coil (6) disk is disposed between the magnetic strip and the coil (6), the coil (6) disk comprising: A winding slot (7) is suitable for fixing the coil (6); The magnetic strip slot (8) is disposed opposite to the winding slot (7) and is suitable for fixing the magnetic strip.

14. An electric rice cooker, characterized in that, Includes the magnetic strip assembly structure as described in any one of claims 1-13.

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