A magnetic stripe, a magnetic stripe assembly structure, and a rice cooker

Abstract

The present invention provides a magnetic strip, a magnetic strip assembly structure and a rice cooker. By additionally providing a first end magnetic strip and a second end magnetic strip, during use, the first end magnetic strip and the second end magnetic strip are arranged on the inner and outer sides of the coil. For the coil, the density of the closed magnetic field lines located outside the coil is less than the density of the closed magnetic field lines located inside the coil. Through the above arrangement, the magnetic flux density corresponding to the outside of the coil is less than the magnetic flux density corresponding to the inside of the coil, so that the closed magnetic field lines can be fully utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of rice cookers, and particularly to a rice cooker with better heating effect. Background Art

[0002] For a rice cooker, electromagnetic induction between a magnetic strip and a coil is usually used for heating. The working principle is that after an electric current passes through the coil, an alternating magnetic field surrounding the coil wire is generated. When a magnetic metal cookware is placed on the stove top, magnetic lines of force pass through the cookware body, generating eddy currents, and forming eddy current heat to heat the food in the cookware.

[0003] Existing rice cookers will add a magnetic strip under the coil. The magnetic strip has a high magnetic permeability and can gather the magnetic lines of force diverged by the coil, increasing the magnetic field intensity acting on the cookware body, thereby increasing the heating efficiency. The magnetic strips in the prior art usually adopt a rectangular design. However, at the bottom position of the coil, due to the uneven distribution of magnetic induction lines, the rectangular magnetic strip cannot effectively gather the magnetic lines of force at the bottom of the pot to the maximum extent, resulting in energy waste and low overall utilization rate of the magnetic strip.

[0004] Therefore, in the prior art, a special-shaped magnetic strip is provided, and the magnetic strip is modified into a spliced type, as Figure 1 shown. The special-shaped magnetic strip is made of a "T" - shaped structure by itself. 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 the use of rice cookers with special-shaped magnetic strips in the prior art.

[0006] To this end, the present invention provides a magnetic strip, including: a main magnetic strip, the main magnetic strip includes a first main magnetic strip and a second main magnetic strip connected to each other; end magnetic strips, arranged 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; the sum of the areas of the first end magnetic strip and the first main magnetic strip is greater than the sum of the areas of the second end magnetic strip and the second main magnetic strip.

[0007] For the magnetic strip provided by the present invention, the area of the first main magnetic strip is greater than the area of the second main magnetic strip, and the area of the first end magnetic strip is greater than the area of the second end magnetic strip.

[0008] For the magnetic strip provided by the present invention, at least one of the first main magnetic strip and the second main magnetic strip is arranged in a rectangular shape.

[0009] For the magnetic strip provided by the present invention, the dimensions of the part of the first main magnetic strip corresponding to the first end magnetic strip and / or the part of the second main magnetic strip corresponding to the second end magnetic strip are equal.

[0010] For the magnetic strip provided by the present invention, the main magnetic strip is arranged in a "T" shape.

[0011] For the magnetic strip provided by the present invention, at least one of the first main magnetic strip and the second main magnetic strip is arranged in a trapezoid shape.

[0012] For the magnetic strip provided by the present invention, the first main magnetic strip and the second main magnetic strip are arranged in an isosceles trapezoid shape.

[0013] For the magnetic strip provided by the present invention, along the extension direction from the first end magnetic strip to the second end magnetic strip, the dimension of the first main magnetic strip is smaller than that of the second main magnetic strip.

[0014] For the magnetic strip provided by the present invention, the end magnetic strip and the main magnetic strip are perpendicular to each other.

[0015] The present invention also provides a magnetic strip assembly structure, including: a coil, arranged in a ring shape; the magnetic strip provided by the present invention, wherein the first end magnetic strip of the magnetic strip is arranged at the central part of the coil, the second end magnetic strip is arranged at the outer circumferential part of the coil, and the coil is clamped between the first end magnetic strip and the second end magnetic strip.

[0016] For the magnetic strip assembly structure provided by the present invention, a plurality of the magnetic strips are arranged radially with the center of the coil as the center.

[0017] Further, it also includes: a coil disk, arranged between the magnetic strip and the coil, and the coil disk includes: a winding slot, adapted to fix the coil; a magnetic strip slot, arranged opposite to the winding slot, adapted to fix the magnetic strip.

[0018] 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.

[0019] The technical solution of the present invention has the following advantages:

[0020] 1. For the magnetic strip provided by the present invention, the end magnetic strip is arranged at both ends of the main magnetic strip and is connected to the main magnetic strip at a certain angle. The end magnetic strip includes 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. The sum of the areas of the first end magnetic strip and the first main magnetic strip is greater than the sum of the areas of the second end magnetic strip and the second main magnetic strip.

[0021] By supplementing the setting of the first end magnetic strip and the second end magnetic strip, during use, the first end magnetic strip and the second end magnetic strip are arranged on the inner and outer sides of the coil. For the coil, the density of the closed magnetic field lines located outside the coil is less than the density of the closed magnetic field lines located inside the coil. Through the above setting method, the magnetic flux density corresponding to the outside of the coil is less than the magnetic flux density corresponding to the inside of the coil, so that the full utilization of the closed magnetic field lines can be achieved.

[0022] 2. The magnetic strip provided by the present invention, the area of the first main magnetic strip is larger than the area of the second main magnetic strip, and the area of the first end magnetic strip is larger than the area of the second end magnetic strip.

[0023] Through the above setting method, it can be ensured that both the inside of the coil and the area close to the inside of the coil correspond to a relatively large magnetic flux density, so as to maximize the utilization of the closed magnetic field lines generated by the coil.

[0024] At the same time, through the above setting method, on the premise that the total volume of the magnetic strip remains unchanged, the overall magnetic flux density of the magnetic strip is increased, thereby improving the ability to converge the closed magnetic field lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the magnetic strip provided in the background art of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the first magnetic strip provided by the present invention;

[0028] Figure 3 It is an installation schematic diagram of several first magnetic strips provided by the present invention;

[0029] Figure 4 It is a schematic structural diagram of the second magnetic strip provided by the present invention;

[0030] Figure 5 It is an installation schematic diagram of several second magnetic strips provided by the present invention;

[0031] Figure 6 It is an assembly schematic diagram between the first magnetic strip provided by the present invention and the coil;

[0032] Figure 7 It is a schematic structural diagram of the coil disk provided by the present invention.

[0033] Description of the reference numerals in the drawings:

[0034] 1 - Main magnetic strip; 11 - First main magnetic strip; 12 - Second main magnetic strip; 2 - End magnetic strip; 21 - First end magnetic strip; 22 - Second end magnetic strip; 3 - Coil; 4 - Wire winding slot; 5 - Magnetic strip slot. Detailed implementation manners

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Embodiment 1

[0040] This embodiment provides a magnetic strip, as Figures 2 - 5 shown, including:

[0041] A main magnetic strip 1, the main magnetic strip 1 includes a first main magnetic strip 11 and a second main magnetic strip 12 connected to each other;

[0042] The end magnetic strips 2 are arranged at both ends of the main magnetic strip 1 and are connected to the main magnetic strip 1 at a certain angle. The end magnetic strips 2 include a first end magnetic strip 21 and a second end magnetic strip 22. The first end magnetic strip 21 is connected to the first main magnetic strip 11, and the second end magnetic strip 22 is connected to the second main magnetic strip 12. In this embodiment, the angle between the end magnetic strip 2 and the main magnetic strip 1 is not overly limited. As a preferred implementation, the first end magnetic strip 21 is perpendicular to the first main magnetic strip 11, and the second end magnetic strip 22 is perpendicular to the second main magnetic strip 12;

[0043] Specifically, the materials of the main magnetic strip 1 and the end magnetic strips 2 are not overly limited. They can be common materials in the prior art such as neodymium iron boron magnets and alnico magnets, and are not overly limited in this embodiment.

[0044] In this embodiment, the sum of the areas of the first end magnetic strip 21 and the first main magnetic strip 11 is greater than the sum of the areas of the second end magnetic strip 22 and the second main magnetic strip 12. By supplementing the first end magnetic strip 21 and the second end magnetic strip 22, during use, the first end magnetic strip 21 and the second end magnetic strip 22 are arranged on the inner and outer sides of the coil 3. For the coil 3, the density of the closed magnetic lines located outside the coil 3 is less than the density of the closed magnetic lines located inside the coil 3. Through the above arrangement, the magnetic flux density corresponding to the outside of the coil 3 is less than the magnetic flux density corresponding to the inside of the coil 3, thereby enabling the full utilization of the closed magnetic lines.

[0045] To implement the above solution, in this embodiment, the following implementation methods can be adopted:

[0046] First, the area of the first end magnetic strip 21 is smaller than the area of the second end magnetic strip 22, and the area of the first main magnetic strip 11 is greater than the area of the first end magnetic strip 21;

[0047] Second, the area of the first end magnetic strip 21 is greater than the area of the second end magnetic strip 22, and the area of the first main magnetic strip 11 is smaller than the area of the first end magnetic strip 21;

[0048] Third, as a preferred implementation, as Figure 2 and Figure 4 shown, the area of the first main magnetic strip 11 is greater than the area of the second main magnetic strip 12, and the area of the first end magnetic strip 21 is greater than the area of the second end magnetic strip 22. Through the above arrangement, it can be ensured that a relatively large magnetic flux density corresponds to the inside of the coil 3 and the area close to the inside of the coil 3, thereby maximizing the utilization of the closed magnetic lines generated by the coil 3.

[0049] In this embodiment, the shapes of the first main magnetic strip 11 and the second main magnetic strip 12 are not overly limited. They can be regular shapes or irregular shapes, as long as the area meets the above requirements.

[0050] As an implementation manner, as Figure 2 shown, at least one of the first main magnetic strip 11 and the second main magnetic strip 12 is arranged in a rectangular shape. The second main magnetic strip 12 can be arranged at the length center part of the first main magnetic strip 11 or deviate from the length center of the first main magnetic strip 11. In this embodiment, the second main magnetic strip 12 is arranged at the center of the first main magnetic strip 11. At this time, the entire main magnetic strip 1 is arranged in a "T" shape.

[0051] Furthermore, as Figure 2 shown, the dimensions of the part of the first main magnetic strip 11 corresponding to the first end magnetic strip 21 and / or the part of the second main magnetic strip 12 corresponding to the second end magnetic strip 22 are equal, so as to effectively realize the conduction of magnetic flux from the end magnetic strip 2 to the main magnetic strip 1.

[0052] As another implementation manner, as Figure 4 shown, at least one of the first main magnetic strip 11 and the second main magnetic strip 12 is arranged in a trapezoidal shape.

[0053] Specifically, the trapezoid can be an isosceles trapezoid or a non-isosceles trapezoid. Preferably, the first main magnetic strip 11 and the second main magnetic strip 12 are arranged in an isosceles trapezoidal shape. At this time, the two long sides of the first main magnetic strip 11 and the second main magnetic strip 12 are connected respectively.

[0054] Meanwhile, in this embodiment, on the premise of ensuring that the sum of the areas of the first end magnetic strip 21 and the first main magnetic strip 11 is greater than the sum of the areas of the second end magnetic strip 22 and the second main magnetic strip 12, the lengths of the first main magnetic strip 11 and the second main magnetic strip 12 are limited. Among them, along the extension direction from the first end magnetic strip 21 to the second end magnetic strip 22, the dimension of the first main magnetic strip 11 is smaller than the dimension of the second main magnetic strip 12, that is, the length of the first main magnetic strip 11 is smaller than the length of the second main magnetic strip 12.

[0055] As a preferred implementation manner, in this embodiment, the volume ratio of the first main magnetic strip 11 to the second main magnetic strip 12 is 0.6. At this time, the overall heating efficiency of the magnetic strip is the highest.

[0056] Embodiment 2

[0057] This embodiment provides a magnetic strip assembly structure, as Figure 6As shown in the figure, it includes: a coil 3, which is arranged in a ring shape; a magnetic strip provided in Embodiment 1, the first end magnetic strip 21 of the magnetic strip is arranged at the central part of the coil 3, the second end magnetic strip 22 is arranged at the outer circumferential part of the coil 3, and the coil 3 is clamped between the first end magnetic strip 21 and the second end magnetic strip 22.

[0058] In this embodiment, in order to achieve a stable connection between the coil 3 and the magnetic strip, a coil disc is arranged between the coil 3 and the magnetic strip, as Figure 7 shown in the figure. A wire winding slot and a magnetic strip slot are arranged on the coil disc. The wire winding slot is used to fix the coil 3. The wire winding slot includes a plurality of bumps arranged side by side. The coil 3 is arranged in the gap between two adjacent bumps. The magnetic strip slot is used to fix the coil disc. Specifically, a clamping claw extending inward is arranged on the magnetic strip slot, and the magnetic strip is fixed by the clamping claw.

[0059] Specifically, as Figure 3 、 Figure 5 、 Figure 6 shown in the figure, several magnetic strips are arranged in a radial shape with the center of the coil 3 as the center of the circle. The magnetic flux density of the magnetic strip located at the central part of the coil 3 is higher, and it can make full use of the more dense closed magnetic lines at the central part of the coil 3.

[0060] The number of magnetic strips is not limited, and it can be 6 or other numbers.

[0061] Embodiment 3

[0062] This embodiment provides an electric rice cooker, which includes the magnetic strip provided in Embodiment 1 or the magnetic strip assembly structure provided in Embodiment 2.

[0063] Specifically, the electric rice cooker includes an inner pot, and cooking operations are realized through the inner pot. A clamping part is arranged on the outer side of the bottom inside, and the coil is wound around the clamping part by itself.

[0064] Obviously, the above embodiments are only examples given for clear illustration, and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A magnetic stripe assembly structure, characterized in that, The magnetic strip includes: A main magnetic strip (1), the main magnetic strip (1) includes a first main magnetic strip (11) and a second main magnetic strip (12) connected to each other; End magnetic strips (2), arranged 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 (2) include a first end magnetic strip (21) and a second end magnetic strip (22). The first end magnetic strip (21) is connected to the first main magnetic strip (11), and the second end magnetic strip (22) is connected to the second main magnetic strip (12); The sum of the area of the first end magnetic strip (21) and the first main magnetic strip (11) is greater than the sum of the area of the second end magnetic strip (22) and the second main magnetic strip (12); Along the extension direction from the first end magnetic strip (21) to the second end magnetic strip (22), the length of the first main magnetic strip (11) is less than the length of the second main magnetic strip (12); The magnetic strip assembly structure includes: A coil (3), arranged in a ring shape; A magnetic strip, the first end magnetic strip (21) of the magnetic strip is arranged at the central part of the coil (3), the second end magnetic strip (22) is arranged at the outer circumferential part of the coil (3), and the coil (3) is clamped between the first end magnetic strip (21) and the second end magnetic strip (22).

2. The magnetic stripe assembly structure according to claim 1, characterized in that, The area of the first main magnetic strip (11) is greater than the area of the second main magnetic strip (12), and the area of the first end magnetic strip (21) is greater than the area of the second end magnetic strip (22).

3. The magnetic stripe assembly structure according to claim 2, 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.

4. The magnetic stripe assembly structure according to claim 3, characterized in that, The dimensions of the part of the first main magnetic strip (11) corresponding to the first end magnetic strip (21) and / or the part of the second main magnetic strip (12) corresponding to the second end magnetic strip (22) are equal.

5. The magnetic stripe assembly structure according to claim 4, characterized in that, The main magnetic strip (1) is arranged in a "T" shape.

6. The magnetic stripe assembly structure according to claim 1, 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.

7. The magnetic stripe assembly structure according to claim 6, characterized in that, The first main magnetic strip (11) and the second main magnetic strip (12) are arranged in an isosceles trapezoidal shape.

8. The magnetic stripe assembly structure according to any one of claims 1 - 7, characterized in that, The end magnetic strip (2) is perpendicular to the main magnetic strip (1).

9. The magnetic stripe assembly structure according to claim 1, characterized in that, A plurality of the magnetic strips are arranged radially with the center of the coil (3) as the center.

10. The magnetic stripe assembly structure according to claim 1 or 9, characterized in that, It further includes: A coil disk, arranged between the magnetic strip and the coil (3). The coil disk includes: A winding card slot (4), suitable for fixing the coil (3); A magnetic strip card slot (5), arranged facing away from the winding card slot (4), suitable for fixing the magnetic strip.

11. An electric rice cooker, characterized in that, It includes the magnetic strip assembly structure according to any one of claims 1 - 10.

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