Electromagnetic winding structure, coil disk and cooking appliance

Abstract

The present invention provides an electromagnetic winding structure, a coil disc and a cooking appliance. The electromagnetic winding structure includes: a first winding structure provided with a first positioning structure suitable for winding a coil; a second winding structure at least sleeved on the outer peripheral wall of the first winding structure, the second winding structure is detachably connected to the first winding structure, and the second winding structure is provided with a second positioning structure suitable for winding a coil. By providing the second winding structure, abnormal problems such as too high step voltage of components on the circuit board can be avoided, the temperature of the components can be prevented from being too high, and the service life of the components can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen utensils, and particularly relates to an electromagnetic winding structure, a coil disc and a cooking appliance. Background Art

[0002] To ensure the uniform heating of an electric rice cooker, a designer will choose to install a heat source on the side of the inner pot. Generally, the side heat source of an IH cooker is composed of enameled wires.

[0003] For most IH cookers, as Figure 1 shown, the side enameled wires are directly wound around the side wall 12 of the winding disc 1. With this structure of the winding disc 1, the distance c' from the side enameled wires to the inner pot 10 is composed of the wall thickness a' of the winding disc 1 and the distance b' between the winding disc 1 and the inner pot 10. That is, c' = a' + b'. To prevent the inner pot 10 from shaking too much in the cooker body, the distance d' between the support ring and the inner pot 10 needs to be controlled within 1.5 mm. At the same time, to ensure that the distance d' between the support ring and the inner pot 10 < 1.5 mm, the distance b' between the winding disc 1 and the inner pot 10 needs to be controlled within 5 mm, that is, b' < 5 mm. If the value of b' is too large, it will cause the diameter e' of the mouth of the winding disc 1 to be greater than the diameter f' of the mouth of the support ring, forming a receiving cavity for the inner pot 10 with a small mouth diameter and a large root diameter. This kind of receiving cavity for the inner pot 10 is not convenient for cleaning and is not beautiful. Therefore, the value of b' cannot be too large, and a receiving cavity for the inner pot 10 with a small mouth diameter and a large root diameter should be avoided. In addition, to ensure smooth injection molding, the wall thickness a' of the winding disc 1 cannot exceed 3 mm, that is, a' < 3 mm. In summary, the distance c' from the side enameled wires to the inner pot 10 = a' + b' < 3 + 5 = 8 mm, that is, c' < 8 mm.

[0004] It is found in experiments that when the distance between the side enameled wires and the inner pot 10 is less than or equal to 8 mm, the components on the circuit board will have an abnormal situation of too high step voltage, which will cause the temperature of the components to be too high and lead to a low service life of the components. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the components on the circuit board of the pot body structure of the existing cooking appliance have too high step voltage, so as to provide an electromagnetic winding structure, a coil disc and a cooking appliance that can avoid the problem of too high step voltage of the components on the circuit board.

[0006] The present invention provides an electromagnetic winding structure, including:

[0007] A first winding structure, provided with a first positioning structure suitable for winding a coil;

[0008] The second winding structure is at least sleeved on the outer peripheral wall of the first winding structure. The second winding structure is detachably connected to the first winding structure, and a second positioning structure adapted to wind a coil is provided on the second winding structure.

[0009] Optionally, the second positioning structure is provided on the outer peripheral wall of the second winding structure.

[0010] Optionally, the first winding structure includes a bottom wall and an annular side wall connected to the bottom wall. The bottom wall and the side wall jointly enclose a receiving cavity; the first positioning structure is provided on the side of the bottom wall facing away from the receiving cavity; the second winding structure is sleeved on the side wall.

[0011] Optionally, the electromagnetic winding structure provided by the present invention further includes a first limiting structure for limiting the connection between the second winding structure and the first winding structure.

[0012] Optionally, the second winding structure is a winding ring.

[0013] Optionally, the winding ring includes an annular main body, and there is a gap between the inner peripheral wall of the annular main body and the outer peripheral wall of the first winding structure;

[0014] Optionally, the first winding structure further includes a convex edge extending outward from one end of the side wall away from the bottom wall. One end of the second winding structure facing the convex edge is the first end, and the end facing away from the convex edge is the second end; the first limiting structure includes:

[0015] At least one relief groove is provided on the second end;

[0016] At least one limiting block is provided on the first winding structure and has a first state of being received in the relief groove and a second state of being disengaged from the relief groove and abutting against the second end.

[0017] Optionally, the second end includes an extension wall extending towards the first winding structure, and the extension wall is adapted to abut against the limiting block when the limiting block is in the second state.

[0018] Optionally, the limiting block includes:

[0019] A limiting plate extends outward from the outer peripheral wall of the first winding structure and is parallel to the end face of the second end;

[0020] At least one reinforcing rib is provided on the first winding structure and is connected to the side of the limiting plate facing away from the second winding structure, and the reinforcing rib intersects with the limiting plate.

[0021] Optionally, the first limiting structure further includes a stop block disposed on the end surface of the second end, and there is a distance between the stop block and the relief groove.

[0022] Optionally, there are a plurality of the relief grooves, which are circumferentially spaced along the second winding structure; the number of the limiting blocks is equal to the number of the relief grooves and is correspondingly arranged with the relief grooves.

[0023] Optionally, the electromagnetic winding structure provided by the present invention further includes a second limiting structure for limiting the connection between the second winding structure and the first winding structure.

[0024] Optionally, the second limiting structure includes:

[0025] At least one anti-rotation rib disposed on the first winding structure,

[0026] At least one lug disposed on the second winding structure, one end of the lug connected to the second winding structure is a connection end, and the end far from the second winding structure is a free end; the lug has a limiting state in which it abuts against the anti-rotation rib and a separated state in which it is separated from the anti-rotation rib; when the lug is in the limiting state, the distance between the free end and the connection end is not less than the distance between the anti-rotation rib and the connection end.

[0027] Optionally, there are a plurality of the lugs, which are circumferentially spaced along the second winding structure; the number of the anti-rotation ribs is equal to the number of the lugs and is correspondingly arranged with the lugs one by one.

[0028] Optionally, the first positioning structure and / or the second positioning structure is a winding groove.

[0029] The present invention also provides a coil disk, including the above-mentioned electromagnetic winding structure and a magnetic strip holder connected to the electromagnetic winding structure.

[0030] Optionally, the second winding structure is located between the first winding structure and the magnetic strip holder.

[0031] The present invention also provides a cooking appliance, including the above-mentioned coil disk.

[0032] Optionally, it further includes an inner pot. An accommodation cavity adapted to accommodate the inner pot is formed inside the first winding structure. The wall thickness a of the first winding structure is < 3 mm, the distance b between the first winding structure and the inner pot is < 5 mm, the distance g between the second winding structure and the first winding structure is > 0.5 mm, and the wall thickness h of the second winding structure is < 3 mm.

[0033] Optionally, the cooking appliance is an electric rice cooker.

[0034] The technical solution of the present invention has the following effects:

[0035] 1. The electromagnetic winding structure provided by the present invention includes: a first winding structure provided with a first positioning structure suitable for winding a coil; a second winding structure sleeved at least on the outer peripheral wall of the first winding structure, the second winding structure is detachably connected to the first winding structure, and a second positioning structure suitable for winding a coil is provided on the outer peripheral wall of the second winding structure. By providing the second winding structure, when the electromagnetic winding structure is used on a rice cooker, let the distance between the second winding structure and the first winding structure be g, and the distance c from the side coil on the second winding structure to the inner pot is at least composed of the wall thickness a of the first winding structure, the distance b between the first winding structure and the inner pot, and the distance g between the second winding structure and the outer peripheral wall of the first winding structure, that is, c = a + b + g. That is, the distance c from the coil on the second winding structure to the inner pot can be increased, so that without the need to make the wall thickness h of the second winding structure relatively thick, even if due to internal requirements of the rice cooker, a and b need to satisfy a < 3 mm and b < 5 mm, that is, a + b < 8 mm, c can still satisfy c > 8 mm through g. This can not only avoid abnormal problems such as too high step voltage of components on the circuit board, prevent the components from getting too hot, and improve the service life of the components, but also reduce the injection molding difficulty of the second winding structure.

[0036] 2. In the electromagnetic winding structure provided by the present invention, the second positioning structure is provided on the outer peripheral wall of the second winding structure. The wall thickness of the second winding structure is h, and the distance c from the side coil on the second winding structure to the inner pot is c ≥ a + b + h + g. In this way, even if due to internal requirements of the rice cooker, a and b need to satisfy a < 3 mm and b < 5 mm, that is, a + b < 8 mm, c can still satisfy c > 8 mm through h and g, so as to avoid abnormal problems such as too high step voltage of components on the circuit board, prevent the components from getting too hot, and improve the service life of the components.

[0037] 3. In the electromagnetic winding structure provided by the present invention, the winding ring includes an annular main body, and there is a distance between the inner peripheral wall of the annular main body and the outer peripheral wall of the first winding structure. Let the distance between the inner peripheral wall of the annular main body and the outer peripheral wall of the first winding structure be g, then c = a + b + h + g. That is, by providing an extension wall, the distance c from the coil on the second winding structure to the inner pot can be further increased, so that without the need to make the wall thickness h of the second winding structure relatively thick, c > 8 mm can also be satisfied. This can not only avoid abnormal problems such as too high step voltage of components on the circuit board, prevent the components from getting too hot, and improve the service life of the components, but also reduce the injection molding difficulty of the second winding structure.

[0038] 4. For the electromagnetic winding structure provided by the present invention, one end of the second winding structure facing the convex edge is the first end, and the end facing away from the convex edge is the second end; the first limiting structure includes: at least one relief groove provided on the second end, and at least one limiting block provided on the first winding structure, which has a first state of being received in the relief groove and a second state of being disengaged from the relief groove and abutting against the second end. During installation, when the second winding structure is first sleeved on the side wall of the first winding structure, the limiting block enters the relief groove. When the first end contacts the convex edge, the limiting block disengages from the relief groove, and then the second winding structure is rotated relative to the first winding structure. Since the distance between the end face of the second end and the end face of the first end is equal to or slightly less than the distance between the limiting block and the convex edge, the limiting block disengaged from the relief groove will abut against the end face of the second end. Therefore, through the cooperation of the limiting block and the convex edge, the second winding structure is clamped between the limiting block and the convex edge, realizing the installation and fixation of the second winding structure on the first winding structure. This limiting structure can not only realize the quick disassembly and assembly between the second winding structure and the first winding structure, but also realize the positioning of the second winding structure and the first winding structure in the installed state.

[0039] 5. For the electromagnetic winding structure provided by the present invention, the limiting block includes: a limiting plate extending outward from the outer peripheral wall of the first winding structure and parallel to the end face of the second end; at least one reinforcing rib provided on the first winding structure and connected to the side of the limiting plate facing away from the second winding structure, and the reinforcing rib intersects with the limiting plate. The limiting block with this structural form can not only abut against the end face of the second end through the limiting plate to lock the relative position between the second winding structure and the first winding structure, but also improve the overall strength of the limiting block through the reinforcing rib to prevent the limiting plate from deforming or breaking when abutting against the end face of the second end.

[0040] 6. For the electromagnetic winding structure provided by the present invention, the first limiting structure further includes a stop block provided on the end face of the second end, and there is a spacing between the stop block and the relief groove. In this way, when the limiting block rotates along the end face of the second end, it will be blocked by the stop block, thereby limiting the rotation of the limiting block on the end face of the second end, and further realizing the circumferential limitation of the second winding structure relative to the first winding structure, making the installation between the second winding structure and the first winding structure more stable.

[0041] 7. The electromagnetic winding structure provided by the present invention, wherein the second limiting structure includes: at least one anti-rotation rib provided on the first winding structure, and at least one lug provided on the second winding structure. One end of the lug connected to the second winding structure is the connection end, and the end far from the second winding structure is the free end; the distance between the free end and the connection end is not less than the distance between the anti-rotation rib and the connection end; and the lug has a limiting state where it abuts against the anti-rotation rib and a separated state where it is separated from the anti-rotation rib. In this way, when the second winding structure rotates relative to the first winding structure to a position where the lug corresponds to the anti-rotation rib, since the distance between the free end and the connection end is not less than the distance between the anti-rotation rib and the connection end, the anti-rotation rib will generate a clamping force in the radial direction of the second winding structure on the lug, thereby restricting the second winding structure from continuing to rotate relative to the first winding structure, and further realizing the circumferential limitation of the second winding structure relative to the first winding structure, making the installation between the second winding structure and the first winding structure more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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 following drawings 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.

[0043] Figure 1 is a longitudinal sectional view of an existing rice cooker after removing the lid;

[0044] Figure 2 is a longitudinal sectional view of the rice cooker provided in the first embodiment of the present invention after removing the lid;

[0045] Figure 3 is Figure 2 a three-dimensional schematic diagram of the coil pan in the rice cooker shown in the state of being wound with a coil;

[0046] Figure 4 is Figure 3 a three-dimensional schematic diagram of the first winding structure in the coil pan shown in the state of being wound with a coil;

[0047] Figure 5 is Figure 3 a three-dimensional schematic diagram of the first winding structure in the coil pan shown in the state of removing the coil;

[0048] Figure 6 is Figure 3 a three-dimensional schematic diagram of the second winding structure in the coil pan shown in the state of being wound with a coil;

[0049] Figure 7 It is a three-dimensional schematic diagram of the electromagnetic winding structure provided in the first embodiment of the present invention when the limiting block is in the giving way groove;

[0050] Figure 8 for Figure 7 The three-dimensional schematic diagram of the electromagnetic winding structure shown in the state where the limit block is out of the clearance groove;

[0051] Figure 9 for Figure 7 A longitudinal sectional schematic diagram of the electromagnetic winding structure shown;

[0052] Figure 10 for Figure 3 A three-dimensional schematic diagram of the coil disk from another angle shown;

[0053] Description of reference numerals:

[0054] 1-winding drum, 11-bottom wall, 12-side wall, 13-accommodating cavity, 14-convex edge, 15-first positioning structure, 2-winding ring, 21-annular body, 22-extension wall, 23-first end, 24-second end, 25-second positioning structure, 26-blocking rib, 31-dispatch groove, 321-limiting plate, 322-reinforcement rib, 33-block, 41-anti-rotation rib, 42-lug, 421-connecting end, 422-free end, 5-magnetic strip rack, 10-inner pot, 20-support ring. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] like Figures 2 - 10 As shown, this embodiment provides an electromagnetic winding structure, including a first winding structure and a second winding structure.

[0058] The first winding structure is provided with a first positioning structure 15 suitable for winding the coil.

[0059] The second winding structure is at least sleeved on the outer peripheral wall of the first winding structure. The second winding structure is detachably connected to the first winding structure, and a second positioning structure 25 suitable for winding the coil is provided on the second winding structure.

[0060] When the electromagnetic winding structure is used on a rice cooker, to prevent the inner pot 10 from shaking too much in the cooker body, the distance d between the support ring and the inner pot 10 needs to be controlled within 1.5 mm. At the same time, to ensure that the distance d between the support ring and the inner pot 10 is less than 1.5 mm, the distance b between the peripheral wall of the first winding structure and the inner pot 10 needs to be controlled within 5 mm, that is, b < 5 mm. If the value of b is too large, it will cause the diameter e of the mouth part of the first winding structure to be greater than the diameter f of the mouth part of the support ring, forming an inner pot 10 accommodating cavity with a small mouth diameter and a large root diameter. Such an inner pot 10 accommodating cavity is not convenient for cleaning and is not beautiful. Therefore, the value of b cannot be too large to avoid the inner pot 10 accommodating cavity with a small mouth diameter and a large root diameter. In addition, to ensure smooth injection molding, the wall thickness a of the first winding structure cannot exceed 3 mm, that is, a < 3 mm. In summary, a + b < 3 + 5 = 8 mm. If the second winding structure is not provided, in order to realize the IH function of the rice cooker, the side coil needs to be installed on the first winding structure. At this time, the distance from the side coil to the inner pot 10 is a + b < 8 mm. It was found during the experiment that when the distance between the side enameled wire and the inner pot 10 is less than or equal to 8 mm, the components on the circuit board will have an abnormal problem of too high step voltage, which will cause the temperature of the components to be too high and lead to a low service life of the components. The first winding structure is suitable for accommodating the inner pot of the cooking appliance.

[0061] In this embodiment, by providing the second winding structure, the distance c from the side coil located on the second winding structure to the inner pot 10 is at least composed of the superposition of the wall thickness a of the first winding structure, the distance b between the first winding structure and the inner pot 10, and the wall thickness h of the second winding structure, that is, c ≥ a + b + h. In this way, even if due to internal requirements of the rice cooker, a and b need to satisfy a < 3 mm and b < 5 mm, that is, a + b < 8 mm, it is still possible to make c satisfy c > 8 mm through h, thereby avoiding the abnormal problem of too high step voltage of the components on the circuit board, preventing the temperature of the components from being too high, and improving the service life of the components.

[0062] In this embodiment, the second positioning structure 25 is provided on the outer peripheral wall of the second winding structure.

[0063] In this embodiment, let the distance between the inner peripheral wall of the annular main body 21 and the outer peripheral wall of the first winding structure be g, then c = a + b + h + g. That is, by providing the second positioning structure on the outer peripheral wall of the second winding structure, the distance c from the coil located on the second winding structure to the inner pot 10 can be further increased. Thus, without the need to make the wall thickness h of the second winding structure relatively thick, it is still possible to satisfy c > 8 mm. This can not only avoid the abnormal problem of too high step voltage of the components on the circuit board, prevent the temperature of the components from being too high, and improve the service life of the components, but also reduce the injection molding difficulty of the second winding structure.

[0064] In the specific implementation process, for example, a = 2 mm, b = 4 mm, h = 2 mm, and g > 1.5 mm can be selected, which can ensure that the distance c between the side enameled wire and the inner pot 10 exceeds 9 mm, thereby avoiding excessive step voltage and excessive temperature rise of electrical components.

[0065] The specific structural form of the first winding structure can be various. In this embodiment, the first winding structure includes a bottom wall 11 and an annular side wall 12 connected to the bottom wall 11. The bottom wall 11 and the side wall 12 jointly enclose a receiving cavity 13; the first positioning structure 15 is provided on the side of the bottom wall 11 facing away from the receiving cavity 13; the second winding structure is sleeved on the side wall 12. Preferably, the first winding structure is a winding disk 1.

[0066] In order to make the installation between the second winding structure and the first winding structure more stable, in the electromagnetic winding structure provided in this embodiment, there is also a first limiting structure for limiting the connection between the second winding structure and the first winding structure.

[0067] The specific structural form of the second winding structure can be various. In this embodiment, the second winding structure is a winding ring 2.

[0068] Specifically, the winding ring 2 includes an annular main body 21, and there is a spacing between the inner peripheral wall of the annular main body 21 and the outer peripheral wall of the first winding structure.

[0069] The first winding structure further includes a convex edge 14 extending outward from the end of the side wall 12 away from the bottom wall 11. One end of the second winding structure facing the convex edge 14 is the first end 23, and the end facing away from the convex edge 14 is the second end 24.

[0070] The specific structural form of the first limiting structure can be various. In this embodiment, the first limiting structure includes at least one relief groove 31 and at least one limiting block.

[0071] The relief groove 31 is provided on the second end 24.

[0072] The limiting block is provided on the first winding structure and has a first state of being received in the relief groove 31 and a second state of being disengaged from the relief groove 31 and abutting against the second end 24; and the distance between the end face of the second end 24 and the end face of the first end 23 is not less than the distance between the limiting block and the convex edge 14.

[0073] During installation, when the second winding structure is sleeved on the side wall 12 of the first winding structure, the limiting block enters the relief groove 31. When the first end 23 contacts the convex edge 14, the limiting block disengages from the relief groove 31. Then, the second winding structure is rotated relative to the first winding structure. Since the distance between the end face of the second end 24 and the end face of the first end 23 is equal to or slightly less than the distance between the limiting block and the convex edge 14, the limiting block disengaged from the relief groove 31 will abut against the end face of the second end 24. Thus, through the cooperation between the limiting block and the convex edge 14, the second winding structure is clamped between the limiting block and the convex edge 14, realizing the installation and fixation of the second winding structure on the first winding structure. This limiting structure can not only achieve the quick disassembly and assembly between the second winding structure and the first winding structure, but also realize the positioning of the second winding structure and the first winding structure in the installed state. Preferably, the distance between the end face of the second end 24 and the end face of the first end 23 is L, and the distance between the limiting block and the convex edge 14 is l, and L - l satisfies L - l ≤ 0.5 mm.

[0074] In this embodiment, the second end 24 includes an extension wall 22 extending towards the first winding structure, and the extension wall 22 is adapted to abut against the limiting block when the limiting block is in the second state. By providing the extension wall 22, it is convenient to cooperate with the limiting block, and the area where the limiting block abuts against the second end is increased, making the installation of the second winding structure more stable.

[0075] The specific structural form of the limiting block can be various. In this embodiment, the limiting block includes a limiting plate 321 and at least one reinforcing rib 322.

[0076] The limiting plate 321 extends outwards from the outer peripheral wall of the first winding structure and is parallel to the end face of the second end 24.

[0077] The reinforcing rib 322 is provided on the first winding structure and is connected to the side of the limiting plate 321 facing away from the second winding structure, and the reinforcing rib 322 intersects with the limiting plate 321.

[0078] For the limiting block with this structural form, it can not only lock the relative position between the second winding structure and the first winding structure by abutting the limiting plate 321 against the end face of the second end 24, but also improve the overall strength of the limiting block through the reinforcing rib 322 to prevent the limiting plate 321 from deforming or breaking when abutting against the end face of the second end 24.

[0079] In order to make the installation between the second winding structure and the first winding structure more stable, in this embodiment, the first limiting structure further includes a stopper 33 provided on the end face of the second end 24, and there is a distance between the stopper 33 and the relief groove 31. In this way, when the limiting block rotates along the end face of the second end 24, it will be blocked by the stopper 33 when it encounters the stopper 33, thereby limiting the rotation of the limiting block on the end face of the second end 24, and further realizing the circumferential limitation of the second winding structure relative to the first winding structure, making the installation between the second winding structure and the first winding structure more stable.

[0080] There is no limit to the specific number of the relief grooves 31 and the limiting blocks. In this embodiment, there are multiple relief grooves 31, which are distributed at intervals along the circumference of the second winding structure; the number of the limiting blocks is equal to the number of the relief grooves 31 and is correspondingly arranged with the relief grooves 31. As a variant embodiment, there may also be one relief groove 31 and one limiting block respectively.

[0081] The electromagnetic winding structure provided in this embodiment further includes a second limiting structure for limiting the connection between the second winding structure and the first winding structure.

[0082] The specific structural form of the second limiting structure can be various. In this embodiment, the second limiting structure includes at least one anti-rotation rib 41 and at least one lug 42.

[0083] The anti-rotation rib 41 is provided on the first winding structure.

[0084] The lug 42 is provided on the second winding structure. One end of the lug 42 connected to the second winding structure is the connection end 421, and the end far from the second winding structure is the free end 422; the lug 42 has a limiting state where it abuts against the anti-rotation rib 41 and a separated state where it is separated from the anti-rotation rib 41; when the lug 42 is in the limiting state, the distance between the free end 422 and the connection end 421 is not less than the distance between the anti-rotation rib 41 and the connection end 421.

[0085] In this way, when the second winding structure rotates relative to the first winding structure until the limiting block disengages from the relief groove 31 and abuts against the end face of the second end 24, the lug 42 is at the position corresponding to the anti-rotation rib 41. Since the distance between the free end 422 and the connection end 421 is not less than the distance between the anti-rotation rib 41 and the connection end 421, the anti-rotation rib 41 will generate a clamping force on the lug 42 in the radial direction of the second winding structure, thereby restricting the second winding structure from continuing to rotate relative to the first winding structure, and further realizing the circumferential limitation of the second winding structure relative to the first winding structure, making the installation between the second winding structure and the first winding structure more stable.

[0086] There is no limitation on the specific number of lugs 42 and anti-rotation ribs 41. In this embodiment, there are multiple lugs 42, which are spaced apart along the circumference of the second winding structure. The number of anti-rotation ribs 41 is equal to the number of lugs 42, and they are arranged one-to-one with the lugs 42. As a convertible embodiment, there may be one lug 42 and one anti-rotation rib 41 respectively.

[0087] The specific structural forms of the first positioning structure 15 and the second positioning structure 25 can be various. In the present embodiment, the first positioning structure 15 and the second positioning structure 25 are both winding grooves.

[0088] This embodiment also provides a coil disk, including the above-mentioned electromagnetic winding structure, and a magnetic strip frame 5 connected to the electromagnetic winding structure. The magnetic strip frame 5 is fixed to the first winding structure by screws. The second winding structure is provided with a retaining rib 26, and when the lug 42 is opposite to the corresponding anti-rotation rib 41, the retaining rib 26 abuts against the magnetic strip frame 5 to prevent the second winding structure from rotating relative to the first winding structure in the direction of causing the limit block to fall back into the clearance groove 31.

[0089] In this embodiment, the second winding structure is located between the first winding structure and the magnetic strip frame 5 .

[0090] This embodiment also provides a cooking utensil, including the above-mentioned coil plate, and an inner pot 10, etc.

[0091] In this embodiment, a accommodating cavity 13 suitable for accommodating an inner pot is formed inside the first winding structure, the wall thickness a of the first winding structure is less than 3 mm, the distance b between the first winding structure and the inner pot is less than 5 mm, the distance g between the second winding structure and the first winding structure is greater than 0.5 mm, and the wall thickness h of the second winding structure is less than 3 mm.

[0092] This embodiment also provides an electric rice cooker, comprising the above-mentioned cooking utensil. As a convertible implementation, the electric rice cooker can also be replaced by other cooking utensils.

[0093] 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. An electromagnetic winding structure, characterized in that, Comprising: A first winding structure, provided with a first positioning structure (15) suitable for winding a coil; A second winding structure, at least sleeved on the outer peripheral wall of the first winding structure, the second winding structure is detachably connected to the first winding structure, and the second winding structure is provided with a second positioning structure (25) suitable for winding a coil; the second positioning structure (25) is arranged on the outer peripheral wall of the second winding structure; The first winding structure includes a bottom wall (11) and an annular side wall (12) connected to the bottom wall (11), the bottom wall (11) and the side wall (12) jointly enclose a receiving cavity (13); the first positioning structure (15) is arranged on the side of the bottom wall (11) facing away from the receiving cavity (13); the second winding structure is sleeved on the side wall (12).

2. The electromagnetic winding structure according to claim 1, wherein It further includes a first limiting structure for limiting the connection between the second winding structure and the first winding structure.

3. The electromagnetic winding structure according to claim 2, wherein, The second winding structure is a winding ring (2); the winding ring (2) includes an annular main body (21), and there is a spacing between the inner peripheral wall of the annular main body (21) and the outer peripheral wall of the first winding structure; The first winding structure further includes a convex edge (14) extending outward from one end of the side wall (12) away from the bottom wall (11), one end of the second winding structure facing the convex edge (14) is the first end (23), and the end facing away from the convex edge (14) is the second end (24); the first limiting structure includes: At least one relief groove (31), arranged on the second end (24); At least one limiting block, arranged on the first winding structure, and having a first state of being received in the relief groove (31), and a second state of being disengaged from the relief groove (31) and abutting against the second end (24).

4. The electromagnetic winding structure according to claim 3, characterized in that, The second end (24) includes an extending wall (22) extending towards the first winding structure, and the extending wall (22) is suitable for abutting against the limiting block when the limiting block is in the second state.

5. The electromagnetic winding structure according to claim 3, characterized in that, The limiting block includes: A limiting plate (321), extending outward from the outer peripheral wall of the first winding structure and parallel to the end face of the second end (24); At least one reinforcing rib (322), arranged on the first winding structure and connected to the side of the limiting plate (321) facing away from the second winding structure, and the reinforcing rib (322) intersects with the limiting plate (321).

6. The electromagnetic winding structure according to claim 3, wherein, The first limiting structure further includes a stop block (33) arranged on the end face of the second end (24), and there is a spacing between the stop block (33) and the relief groove (31).

7. The electromagnetic winding structure according to claim 3, wherein There are a plurality of the relief grooves (31), which are distributed at intervals along the circumferential direction of the second winding structure; the number of the limiting blocks is equal to the number of the relief grooves (31) and is correspondingly arranged with the relief grooves (31).

8. The electromagnetic winding structure according to any one of claims 1-7, characterized in that, It further includes a second limiting structure for limiting the connection between the second winding structure and the first winding structure.

9. The electromagnetic winding structure according to claim 8, wherein, The second limiting structure includes: At least one anti-rotation rib (41), arranged on the first winding structure; At least one lug (42) is provided on the second winding structure. One end of the lug (42) connected to the second winding structure is a connection end (421), and the end away from the second winding structure is a free end (422); the lug (42) has a limiting state in contact with the anti-rotation rib (41) and a separated state separated from the anti-rotation rib (41); when the lug (42) is in the limiting state, the distance between the free end (422) and the connection end (421) is not less than the distance between the anti-rotation rib (41) and the connection end (421).

10. The electromagnetic winding structure according to claim 9, wherein, There are a plurality of the lugs (42), which are circumferentially spaced along the second winding structure; the number of the anti-rotation ribs (41) is equal to the number of the lugs (42), and they are arranged in one-to-one correspondence with the lugs (42).

11. A coil disk, characterized in that, It includes the electromagnetic winding structure according to any one of claims 1-10, and a magnetic strip holder (5) connected to the electromagnetic winding structure; The second winding structure is located between the first winding structure and the magnetic strip holder (5).

12. A cooking appliance, characterized in that, It includes the coil pan according to claim 11.

13. The cooking appliance according to claim 12, characterized in that, It further includes an inner pot. An accommodation cavity (13) adapted to accommodate the inner pot is formed inside the first winding structure. The wall thickness a of the first winding structure is < 3 mm, the distance b between the first winding structure and the inner pot is < 5 mm, the distance g between the second winding structure and the first winding structure is > 0.5 mm, and the wall thickness h of the second winding structure is < 3 mm.

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