Magnetic strip, magnetic strip assembly structure and electric heating device

Abstract

The present invention provides a magnetic strip, a magnetic strip assembly structure and an electric heating device, comprising a first magnetic part and a second magnetic part connected and arranged along the length direction, wherein the width of the first magnetic part is greater than that of the second magnetic part; wherein the magnetic strip satisfies: a(3.3a-2.3b-8.3)+b(-6.3b-0.3l+500)+l(-0.5l+1.7a+6.4)≥4000, wherein: the width of the first magnetic part is a, the length of the first magnetic part is l, and the width of the second magnetic part is b. This arrangement can effectively adjust the size and area relationship between the first magnetic part and the second magnetic part on the magnetic strip, thereby achieving the maximum thermal efficiency. Through experiments, when the above arrangement is adopted, the thermal efficiency in the present invention is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric heating equipment, and in particular to a magnetic strip, a magnetic strip assembly structure and an electric heating equipment. Background Art

[0002] IH rice cookers are cooking appliances that heat food using the principle of electromagnetic induction. The working principle is that current flows through the excitation coil, generating an alternating magnetic field around the coil wire. When a magnetic metal pot is placed on the stove, the magnetic lines of force pass through the pot, generating eddy currents, which form eddy current heat to heat the food in the pot. IH rice cookers have the advantages of fast heating, high thermal efficiency, and precise temperature control.

[0003] In order to achieve a better heating effect and improve the utilization efficiency of magnetic lines of force, magnetic strips are added under the coils during IH heating. The magnetic strips have high magnetic permeability and can gather the magnetic lines of force diverging from the coils, increasing the magnetic field strength acting on the pot body, thereby increasing the heating efficiency. Most current products add strip-shaped magnetic strips, which are radially distributed under the coils and span the width of the coils. Strip-shaped magnetic strips have the advantages of easy sintering and assembly; however, because the coils are spiral planar coils, the magnetic field distribution at the bottom is not uniform.

[0004] In the prior art, in order to improve thermal efficiency, the magnetic strips in the area with lower magnetic flux density are appropriately reduced, and the volume of the reduced magnetic strips is increased to the area with higher magnetic flux density, thus ensuring that the magnetic field strength of the pot is increased while using the same magnetic strip volume. However, this arrangement reduces the volume of the peripheral magnetic strips, which will cause more magnetic lines of force to leak out of the periphery. When the number of magnetic lines of force leaking out of the periphery exceeds the number of magnetic lines of force increased inside, the heating effect will deteriorate. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of insufficient thermal efficiency of non-uniform width magnetic strips in the prior art, thereby providing a magnetic strip, a magnetic strip assembly structure and an electric heating device.

[0006] The present invention provides a magnetic strip, comprising:

[0007] A first magnet member and a second magnet member connected and arranged along a length direction, wherein the width of the first magnet member is greater than that of the second magnet member;

[0008] Wherein, the magnetic stripe satisfies:

[0009] a(3.3a-2.3b-8.3)+b(-6.3b-0.3l+500)+l(-0.5l+1.7a+6.4)≥4000, where:

[0010] The width of the first magnet piece is a, the length of the first magnet piece is l, and the width of the second magnet piece is b, with the unit of mm.

[0011] The length of the magnetic strip is L, where l≤0.5L.

[0012] a≥1.2b.

[0013] The present invention also provides a magnetic strip assembly structure, comprising: a coil; and a plurality of the above-mentioned magnetic strips, wherein the magnetic strips are arranged on the coil.

[0014] The distance between the end of the magnetic strip and the center of the coil is r, wherein 20≤r≤45.

[0015] The length of the magnetic strip is L, the radius of the coil is R, L+r≥R.

[0016] The number of magnetic strips distributed on the coil is n, where: a≤2r×tan(180° / n).

[0017] 4≤n≤6.

[0018] The magnetic strip also includes: a first end magnetic strip, which is arranged on one end of the first magnetic part facing the center of the coil; a second end magnetic strip, which is arranged on one end of the second magnetic part facing away from the center of the coil, and is suitable for cooperating with the first end magnetic strip and being engaged with the coil in a limited position.

[0019] The present invention also provides an electric heating device, comprising: the above-mentioned magnetic strip assembly structure.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. The present invention provides a magnetic strip assembly structure, comprising: a first magnetic piece (21) and a second magnetic piece (22) connected and arranged along a length direction, wherein the width of the first magnetic piece (21) is greater than that of the second magnetic piece (22); wherein the magnetic strip (2) satisfies:

[0022] a(3.3a-2.3b-8.3)+b(-6.3b-0.3l+500)+l(-0.5l+1.7a+6.4)≥4000, wherein: the width of the first magnet part (21) is a, the length of the first magnet part (21) is l, and the width of the second magnet is b, the unit is mm.

[0023] Such an arrangement can effectively adjust the size and area relationship between the first magnetic member and the second magnetic member on the magnetic strip, thereby achieving maximum thermal efficiency. Through experiments, when the above arrangement is adopted, the thermal efficiency of the present invention is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a magnetic strip assembly structure provided in an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the magnetic strip of the magnetic strip assembly structure shown;

[0027] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the magnetic stripe of the magnetic stripe assembly structure and other embodiments of the magnetic stripe;

[0028] Figure 4 It is a variation trend diagram of parameter function and efficiency of magnetic stripe in an embodiment of the present invention;

[0029] Description of reference numerals:

[0030] 1 - coil; 2 - magnetic strip; 21 - first magnetic member; 22 - second magnetic member; 23 - first end magnetic strip; 24 - second end magnetic strip. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, 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.

[0035] like Figure 1 - Figure 4 The present embodiment provides a magnetic strip, wherein the magnetic strip 2 comprises a first magnetic piece 21 and a second magnetic piece 22 arranged in a strip shape, wherein the first magnetic piece 21 and the second magnetic piece 22 are connected and arranged along their respective length directions, and the width of the first magnetic piece 21 is greater than that of the second magnetic piece 22. Specifically, in the present embodiment, the magnetic strip 2 is arranged in a "T" shape. The magnetic strip 2 satisfies:

[0036] a(3.3a-2.3b-8.3)+b(-6.3b-0.3l+500)+l(-0.5l+1.7a+6.4)≥4000, wherein: the width of the first magnet part 21 is a, the length of the first magnet part 21 is l, and the width of the second magnet is b. In this embodiment, the value unit of each length parameter is millimeter.

[0037] Wherein, 12≤a≤30, 10≤b≤25, 8≤l≤30. In this embodiment, preferably, a=18, b=10, l=10.

[0038] In this embodiment, the length of the magnetic strip 2 is L, where l≤0.5L and a≥1.2b.

[0039] This embodiment also provides a magnetic strip assembly structure, including a coil 1 and a plurality of the magnetic strips 2 mentioned above.

[0040] The coil 1 is arranged in a circular shape, and is provided with a connector connected to a power source and is suitable for being connected to a power supply.

[0041] A plurality of magnetic strips 2 are arranged on the coil 1 and are distributed in a regular or irregular manner. In this embodiment, the plurality of magnetic strips 2 are arranged radially, and each magnetic strip 2 extends in a length direction and passes through the center of the coil 1 .

[0042] This arrangement can effectively adjust the size and area relationship between the first magnetic member 21 and the second magnetic member 22 on the magnetic strip 2, and further achieve the maximum thermal efficiency under the premise of a certain power of the coil 1. Through experiments, when the above arrangement is adopted, Figure 4 As shown, as the total value of the function on the left side of the above inequality continues to increase, the thermal efficiency is higher. When the above value range of greater than 4000 is met, the thermal efficiency in the present invention is further improved and can reach more than 86%.

[0043] In addition, the distance between the end of the magnetic strip 2 and the center of the coil 1 is r, where 20mm≤r≤45mm. This arrangement can prevent the magnetic strip 2 from occupying the placement space of the temperature-sensing package in the center of the coil 1, and can ensure the heating effect of the center of the coil 1.

[0044] Furthermore, the length of the magnetic strip 2 is L, the radius of the coil 1 is R, L+r≥R, and this arrangement ensures that the coil 1 is within the extension range of the magnetic strip 2. In addition, when the second end magnetic strip 24 is not provided on the magnetic strip 2, at this time l+r=R, and when the end magnetic strip 24 is provided, since the end magnetic strip 24 itself has a certain thickness, one end of the end magnetic strip 2 will protrude to the outside of the coil 1, and at this time l+r>R.

[0045] In this embodiment, the number of magnetic strips 2 distributed on the coil 1 is n, where: a≤2r×tan(180° / n), 4≤n≤6. This arrangement avoids interference between the first magnetic pieces 21 on the magnetic strips 2 and ensures that the first magnetic pieces 21 on each magnetic strip 2 are arranged at intervals.

[0046] The magnetic strip 2 also includes a first end magnetic strip 23 and a second end magnetic strip 24. The first end magnetic strip 23 is arranged on the end of the first magnetic part 21 facing the center of the coil 1; the second end magnetic strip 24 is arranged on the end of the second magnetic part 22 facing away from the center of the coil 1, and is suitable for cooperating with the first end magnetic strip 23 and being limitedly engaged with the coil 1. As a convertible embodiment, the first end magnetic strip 23 and the second end magnetic strip 24 may also not be arranged.

[0047] In this embodiment, the first magnetic member 21 and the second magnetic member 22 have the same thickness. As a convertible implementation, there may be a thickness difference between the first magnetic member 21 and the second magnetic member 22 .

[0048] This embodiment also provides an electric heating device, including the above-mentioned magnetic strip assembly structure.

[0049] In this embodiment, the coil 1 and the magnetic strip assembly structure can be applied in different electromagnetic heating scenarios, and the electric heating device itself can be an induction cooker, an IH electric kettle, an IH soymilk maker, etc. Correspondingly, when the electric heating device is an induction cooker, the above-mentioned coil 1 and the magnetic strip assembly structure are arranged inside the shell. When the electric heating device is an IH electric kettle or an IH soymilk maker, the coil 1 and the magnetic strip 2 assembly structure are arranged below the body to be heated, and the electric heating body itself is made of metal material, such as stainless steel, etc., and a variety of ingredients that need to be heated, such as water, beans, rice, and cereals, can be placed inside the electric heating body.

[0050] In this embodiment, the electric heating device is an electric pressure cooker. Specifically, the electric pressure cooker includes a shell, an inner pot is arranged in the shell, a magnetic strip assembly structure is arranged in the inner pot, an inner pot is arranged above the coil 1, and a plurality of magnetic strips 2 are arranged below the coil 1, and food is cooked through the inner pot.

[0051] By adopting the magnetic strip assembly structure provided above, the thermal efficiency of the entire electric heating equipment can be fully improved, thereby effectively reducing the overall energy consumption while ensuring normal processing.

[0052] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A magnetic strip, characterized in that: include: A first magnet piece (21) and a second magnet piece (22) connected and arranged along a length direction, wherein the width of the first magnet piece (21) is greater than that of the second magnet piece (22); Wherein, the magnetic strip (2) satisfies: a(3.3a-2.3b-8.3)+b(-6.3b-0.3l+500)+l(-0.5l+1.7a+6.4)≥4000, where: The width of the first magnet piece (21) is a, the length of the first magnet piece (21) is l, and the width of the second magnet piece is b, with the unit being mm.

2. The magnetic stripe according to claim 1, characterized in that: The length of the magnetic strip (2) is L, wherein l≤0.5L.

3. The magnetic strip according to claim 1 or 2, characterized in that: a≥1.2b.

4. A magnetic strip assembly structure, characterized in that: include: Coil (1); The magnetic strip according to any one of claims 1 to 3, wherein the magnetic strip (2) is arranged on the coil (1).

5. The magnetic strip assembly structure according to claim 4, characterized in that: The distance between the end of the magnetic strip (2) and the center of the coil (1) is r, where 20≤r≤45.

6. The magnetic strip assembly structure according to claim 5, characterized in that: The length of the magnetic strip (2) is L, the radius of the coil (1) is R, and L+r≥R.

7. The magnetic strip assembly structure according to claim 5 or 6, characterized in that: The number of magnetic strips (2) distributed on the coil (1) is n, where: a≤2r×tan(180° / n).

8. The magnetic strip assembly structure according to claim 7, characterized in that: 4≤n≤6。 9. The magnetic strip assembly structure according to claim 4, characterized in that: The magnetic strip (2) further comprises: A first end magnetic strip (23) disposed on one end of the first magnetic member (21) facing the center of the coil (1); The second end magnetic strip (24) is arranged on the end of the second magnetic member (22) facing away from the center of the coil (1), and is suitable for cooperating with the first end magnetic strip (23) and being limitedly engaged with the coil (1).

10. An electric heating device, characterized in that: include: The magnetic strip assembly structure as described in any one of claims 4 to 9.

Images