A cooking appliance with an electromagnetic wire coil

Abstract

The utility model discloses a kind of electromagnetic wire disc for cooking utensil, including disc body, disc body includes bottom wall and the arc portion around the outer periphery of bottom wall, bottom wall is provided with first winding area, arc portion is provided with the radial extension wire-pressing rib of disc body, wire-pressing rib and arc portion form second winding area between, wire-pressing rib has proximal end close to bottom wall and distal end away from bottom wall, electromagnetic wire disc further includes shaping rib, shaping rib is fixed to the two sides of proximal end along the circumference of disc body, shaping rib of wire-pressing rib two sides is arranged with included angle, to make second winding area form bending angle at wire-pressing rib.In the second winding area, when winding electromagnetic coil, electromagnetic coil will be bent between shaping rib of wire-pressing rib two sides, and then make the electromagnetic coil in second winding area overall polygonal winding, and the part of electromagnetic coil bending, with wire-pressing rib upper and lower alignment, be pressed and limited by wire-pressing rib, to be able to keep relatively neat posture.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to an electromagnetic coil for cooking utensils. Background Technology

[0002] In modern family life, the heating performance of cooking appliances directly affects the taste and nutrition of cooked food. With the development of technology, IH (induction heating) technology, with its advantages of high heating efficiency and fast heating speed, has been widely used in the field of cooking appliances, such as rice cookers and pressure cookers.

[0003] An electromagnetic coil, as the heating device in an electromagnetic cooking appliance, typically consists of a coil body and a coil wound around its surface. Traditional electromagnetic coils generally only wind the coil around the bottom wall of the coil body. Since the bottom of the coil body is usually flat, winding the coil is relatively simple, and the coil is relatively neat after winding. However, this type of electromagnetic coil can only heat the bottom of the inner pot, resulting in extremely uneven heat distribution between the bottom and sides of the inner pot. The heating effect varies greatly in different areas of the inner pot, affecting the evenness of food heating and its taste. Therefore, some products attempt to wind the coil on the side walls of the coil body and the arc-shaped transition area between the bottom and side walls, thus creating side heating for the inner pot.

[0004] However, because the surface of the arc transition area is curved, it is difficult to effectively limit the coil after it is wound, making it difficult for the coil to maintain the preset shape and prone to loosening. Therefore, some products are equipped with wire clamping ribs and limiting ribs on the coil body to limit and tighten the coil wound in the arc transition area.

[0005] For example, Chinese patent CN222339632U ​​discloses an electromagnetic heating device and cooking appliance, which has a side pressure rib in the side winding area and a limiting rib extending circumferentially along the plate body. The coil is wound between the side pressure rib and the plate body. The side pressure rib is used to press the coil onto the surface of the plate body, while the limiting rib can limit the winding shape of the coil, so that the coil is kept in a circular or polygonal winding.

[0006] However, in the above schemes, if the coil is wound in a tightly circular manner, the coil relies mainly on its own tension and simple positioning and fixation by the side pressure ribs and limiting ribs during the winding process, making it difficult to ensure the neatness and stability of the coil arrangement. If the limiting ribs are designed as polygonal structures, causing the coil to wind in a polygonal shape, then in the above schemes, the position where the coil turns to form a corner is within the space between the two side pressure ribs. The tension of the coil at the corner is greater, making it more prone to loosening or straightening. Since the coil in this space is not restricted by the side pressure ribs, it is easy for the coil to become scattered, making it difficult to maintain the polygonal winding shape, resulting in a lower yield rate, lower stability of the magnetic field formed during operation, and poor heating efficiency. Utility Model Content

[0007] This utility model provides an electromagnetic coil for cooking utensils to solve the problem that the non-planar structure on the side of the electromagnetic coil body has a poor limiting effect on the coil when winding the coil, which makes it difficult to guarantee the neatness and stability of the coil arrangement, thus affecting the yield and heating efficiency.

[0008] The technical solution adopted in this utility model is as follows:

[0009] An electromagnetic coil for a cooking appliance includes a coil body, which includes a bottom wall and an arc-shaped portion surrounding the outer periphery of the bottom wall. The bottom wall is provided with a first winding area, and the arc-shaped portion is provided with a pressure rib extending radially along the coil body. A second winding area is formed between the pressure rib and the arc-shaped portion. The pressure rib has a proximal end near the bottom wall and a distal end away from the bottom wall. The electromagnetic coil also includes shaping ribs, which are fixed to both sides of the proximal end along the circumference of the coil body. The shaping ribs on both sides of the pressure rib are arranged at an angle so that the second winding area forms a bending angle at the pressure rib.

[0010] In this invention, the arc-shaped portion of the disc is provided with pressure ribs, and shaping ribs are positioned at an angle at the end of the pressure ribs near the center of the disc. This causes the electromagnetic coil to bend between the shaping ribs on both sides of the pressure ribs when the electromagnetic coil is wound in the second winding area, resulting in a polygonal winding of the electromagnetic coil in the second winding area. Compared to circular winding, the electromagnetic coil experiences greater tension at the bending angles, while the coil extends smoothly between the two bending angles with less tension, making it easier to maintain a neat posture. Furthermore, in this invention, the bending angles with greater electromagnetic coil tension are located directly below the pressure ribs, i.e., the part of the electromagnetic coil in the second winding area that bends, aligning vertically with the pressure ribs and being pressed and restrained by them, thus maintaining a relatively neat posture. This allows the pressure ribs to specifically limit the bending points of the electromagnetic coil in the second winding area, ensuring that the electromagnetic coil in the second winding area is wound in a regular polygonal shape, greatly improving the overall yield of the electromagnetic coil, and ensuring the stability and reliability of the magnetic field generated by the electromagnetic coil in the second winding area, thus guaranteeing heating efficiency.

[0011] In addition, the shaping rib is located near the pressure rib, which allows the two to enhance each other's structural strength. Since the pressure rib has a structure that is fixed at the near end and free at the far end, during the winding process, the pressure rib will swing up and down around the near end under the compression of the coil. Therefore, the near end is subjected to greater force. Through the structural strengthening effect of the shaping rib, the structural strength of the pressure rib at the near end can be improved, the risk of pressure rib breakage can be reduced, and the yield rate of the product can be further improved.

[0012] The shaping rib has a connecting end that is fixed to the pressure line rib, and a guiding end that extends away from the pressure line rib and slopes towards the bottom wall.

[0013] In this design, the end of the shaping rib away from the pressure rib extends towards the bottom wall. When the electromagnetic coil is wound in the second winding area, it forms an outward convex bending angle under the action of the shaping rib. This bending angle increases the tension of the electromagnetic coil, making it less prone to loosening. At the same time, the shaping rib also guides the electromagnetic coil in certain areas on both sides of the bending angle, restricting the coil's movement near the bending angle. This results in a more regular and smoother bend at the bending angle, and a smoother area between the two bending angles.

[0014] The pressure ribs are spaced apart along the circumference of the disc, and there is a gap between the shaping ribs at two adjacent pressure ribs, so that the second winding area forms an extension channel for the conductor to extend smoothly at the corresponding gap.

[0015] In this design, the pressure ribs are arranged at intervals along the circumference of the disc. The electromagnetic coil in the second winding area forms a bending angle at the pressure ribs and extends smoothly between two adjacent pressure ribs, so that the electromagnetic coil is polygonal or approximately circular. Since the wire extends smoothly in the extension channel, the tension of the wire is small, so there is no need to restrict it with pressure ribs, thereby reducing the number of pressure ribs, simplifying the structure of the disc and saving costs.

[0016] The pressure bar includes a first pressure part and a second pressure part located below the first pressure part. A first winding space is formed between the first pressure part and the arc-shaped part, and a second winding space is formed between the second pressure part and the first pressure part.

[0017] In this design, the electromagnetic coil in the second winding area is partially wound within the first winding space and partially wound within the second winding space, resulting in a two-layer arrangement of the electromagnetic coils in the second winding area. When current passes through the coils, a magnetic field is generated, and the current directions in both layers of coils are consistent. According to the right-hand screw rule, the magnetic fields generated by the two layers of coils also have the same direction, thus the magnetic fields generated by the two layers of coils will superimpose. During this superposition process, the magnetic field lines generated by adjacent electromagnetic coils reinforce each other in space, significantly increasing the overall magnetic field strength of the electromagnetic coil. In practical applications, the enhanced magnetic field can interact more efficiently with the cookware. According to the principle of electromagnetic induction, a changing magnetic field will induce a current in the cookware. The increase in magnetic field strength means an increase in the induced current generated in the cookware, resulting in more heat generation, thereby achieving faster and more efficient heating, significantly improving cooking results, and shortening cooking time.

[0018] The first and second pressure lines are staggered vertically, with the shaping rib on one side fixed to the first pressure line and the shaping rib on the other side fixed to the second pressure line.

[0019] In this design, the upper and lower pressure sections are staggered left and right, which not only meets the positioning requirements for winding the two layers of electromagnetic coils but also enhances the overall structural strength of the pressure ribs and extends the service life of the electromagnetic coil. Simultaneously, the different positioning positions of the first and second pressure sections on the electromagnetic coil increase the overall limiting area and improve the limiting effect. This ensures the neatness and stability of the electromagnetic coil during winding and use, reduces uneven magnetic field distribution caused by loosening or displacement of the electromagnetic coil, and improves the efficiency of electromagnetic induction heating.

[0020] At least some of the shaping ribs are provided with hook structures, which form a limiting groove for the conductor to pass through.

[0021] In this design, the two layers of electromagnetic coils in the second winding area are wound with a single wire. The hook structure allows the outer coil to begin winding after the inner coil is wound, via a limiting groove. The limiting groove ensures a smoother and more regular transition between the two coil layers, guaranteeing that the outer coil can be wound with sufficient tension after the inner coil is finished, thus improving the tension of both the inner and outer coil layers.

[0022] The electromagnetic coil also includes a bottom coil wound in the first winding area and a side coil wound in the second winding area, with the bottom coil and the side coil wound independently on the coil body.

[0023] In this design, two independent sets of electromagnetic coils are wound separately to achieve independent heating control of the bottom and sides of the cookware. The heating mode can be flexibly adjusted according to the cooking characteristics of different ingredients. When the bottom and sides are heated simultaneously, an internal and external convection tumbling heating environment is created, resulting in more even heating of the food, greatly improving its texture and flavor. It also facilitates the full release of nutrients from the food, significantly enhancing the heating performance of the cooking appliance. Furthermore, in certain cooking states, a specific section of the electromagnetic coil can be controlled to operate independently, achieving low-power heating and saving energy.

[0024] The disk body also includes a side wall located above the arc-shaped portion, the side wall being provided with a third winding area, the side coil extending from the second winding area to the third winding area, and there being a separation gap between the side coil in the second winding area and the side coil in the third winding area.

[0025] In this design, the first winding area corresponds to the bottom wall of the upper pot, the third winding area corresponds to the side wall of the pot or the transition area between the side wall and the bottom wall, and the second winding area also corresponds to the transition area. This allows the electromagnetic coils in the three winding areas to provide three-dimensional heating to the pot, improving the evenness of heating of the food inside. The spacing between the coils, while ensuring effective heating of the side wall and transition area, reduces the number of electromagnetic coils used, thus saving costs.

[0026] The electromagnetic coil also includes a magnetic strip frame fixed to the coil body. The magnetic strip frame is provided with a first magnetic strip, which is positioned corresponding to the arc-shaped portion and is offset from the pressure rib.

[0027] In this design, after the magnetic strip holder is fixed to the reel body, the first magnetic strip can also press and limit the electromagnetic coil wound in the second winding area. Thus, the first magnetic strip and the pressure ribs work together to press and limit the electromagnetic coil, and their staggered arrangement, meaning they press different positions on the electromagnetic coil, makes the pressing position more dispersed and even, improving the limiting effect and making the electromagnetic coil fit more closely and neatly with the reel body. At the same time, it gives the first magnetic strip more functions, simplifying the overall structure of the electromagnetic reel and saving costs.

[0028] The magnetic strip holder is also provided with a second magnetic strip, which is positioned corresponding to the bottom wall. The first and second magnetic strips are offset in the radial direction of the disk body.

[0029] In this design, the magnetic strips guide and concentrate the magnetic field during electromagnetic heating, reducing leakage and enhancing eddy current generation in the cookware. The staggered arrangement of the first and second magnetic strips ensures that their magnetic field peaks are offset, promoting a smooth transition of the magnetic field across the curved surface of the cookware, resulting in a more uniform temperature distribution on the bottom, curved, and side walls. Furthermore, when the two magnetic strips are aligned, the magnetic fields generated by the electromagnetic coils in the first and second winding areas may couple, causing unnecessary flux competition or eddy current losses. The angled design of the two magnetic strips reduces electromagnetic interference between them, allowing the magnetic field to act more independently in its respective area, thereby improving energy conversion efficiency. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0031] Figure 1 This is a cross-sectional view of an electromagnetic coil according to one embodiment of the present invention.

[0032] Figure 2 for Figure 1 A magnified view of area A in the middle;

[0033] Figure 3 This is a schematic diagram of the structure of an electromagnetic coil according to one embodiment of the present invention, wherein the magnetic strip frame is not shown;

[0034] Figure 4 This is a schematic diagram of the bottom structure of the disc body according to one embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the disk body according to another embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of an electromagnetic coil according to one embodiment of the present invention.

[0037] in:

[0038] 1. Disc body; 11. Bottom wall; 111. First winding area; 12. Arc-shaped part; 121. Second winding area; 122. Bending angle; 123. Extension channel; 13. Side wall; 131. Third winding area; 132. Separator rib; 133. Winding groove; 14. Pressure rib; 141. First pressure part; 142. Second pressure part; 143. First winding space; 144. Second winding space; 145. Proximal end; 146. Distal end; 15. Shaping rib; 151. Connecting end; 152. Guide end; 16. Pressure rib protrusion; 17. Hook structure; 171. Limiting groove; 18. Separation gap; 19. Winding gap;

[0039] 2. Bottom coil;

[0040] 3. Side coils;

[0041] 4. Magnetic strip holder; 41. First magnetic strip; 42. Second magnetic strip. Detailed Implementation

[0042] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0044] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] like Figure 1 , Figure 3 , Figure 4 As shown, an electromagnetic coil for a cooking appliance includes a coil body 1. The coil body 1 includes a bottom wall 11 and an arc-shaped portion 12 surrounding the outer periphery of the bottom wall 11. The bottom wall 11 is provided with a first winding area 111. The arc-shaped portion 12 is provided with a pressing rib 14 extending radially along the coil body 1. A second winding area 121 is formed between the pressing rib 14 and the arc-shaped portion 12. The pressing rib 14 has a proximal end 145 near the bottom wall 11 and a distal end 146 away from the bottom wall 11. The electromagnetic coil also includes a shaping rib 15. The shaping rib 15 is fixed to both sides of the proximal end 145 along the circumference of the coil body 1. The shaping ribs 15 on both sides of the pressing rib 14 are arranged at an angle so that the second winding area 121 forms a bending angle 122 at the pressing rib 14.

[0048] It is understood that in this invention, an electromagnetic coil is formed by tightly winding a wire in a circular or polygonal shape (with the inner and outer loops of wire in the same layer in contact) within the first winding area 111 and / or the second winding area 121.

[0049] like Figure 2 , Figure 3 , Figure 4As shown, the pressure rib 14 extends radially along the disc body 1, with the proximal end 145 fixed to the disc body 1 and the distal end 146 free. When the wire is wound in the space between it and the disc body 1, the pressure rib 14 can swing away from the disc body 1 under the pressure of the wire, thereby increasing the space between the two and exerting a pressing force on the wire toward the disc body 1, firmly pressing the wire onto the surface of the disc body 1.

[0050] In this invention, the arc-shaped portion 12 of the disc body 1 is provided with a pressure rib 14, and a shaping rib 15 is set at an angle at one end of the pressure rib 14 near the center of the disc body 1. This allows the electromagnetic coil to bend between the shaping ribs 15 on both sides of the pressure rib 14 when the electromagnetic coil is wound in the second winding area 121, resulting in a polygonal winding of the electromagnetic coil within the second winding area 121. Compared to circular winding, the electromagnetic coil experiences greater tension at the bending angle 122, while the electromagnetic coil between the two bending angles 122 extends smoothly with less tension, making it easier to maintain a regular shape. Furthermore, in this invention, the bending angle 122 where the electromagnetic coil experiences greater tension is located directly below the pressure rib 14, i.e., the part of the electromagnetic coil within the second winding area 121 where it bends, aligning vertically with the pressure rib 14 and being pressed and limited by it, thus maintaining a relatively regular shape. This allows the pressure rib 14 to specifically limit the bending position of the electromagnetic coil in the second winding area 121, ensuring that the electromagnetic coil in the second winding area 121 is wound in a regular polygonal shape, greatly improving the overall yield of the electromagnetic coil, and ensuring the stability and reliability of the magnetic field generated by the electromagnetic coil in the second winding area 121, thus ensuring heating efficiency.

[0051] Furthermore, the shaping rib 15 is located at the proximal end 145 of the pressure rib 14, enabling the two to enhance each other's structural strength. Since the pressure rib 14 has a structure where the proximal end 145 is fixed and the distal end 146 is free, during the winding process, the pressure rib 14 will swing up and down around the proximal end 145 under the compression of the coil. Therefore, the proximal end 145 is subjected to greater force. Through the structural strengthening effect of the shaping rib 15, the structural strength of the pressure rib 14 at the proximal end 145 can be improved, the risk of the pressure rib 14 breaking can be reduced, and the yield rate of the product can be further improved.

[0052] Preferably, such as Figure 4 As shown, the shaping rib 15 has a connecting end 151 fixed to the pressure rib 14, and a guiding end 152 away from the pressure rib 14, the guiding end 152 extending obliquely toward the bottom wall 11.

[0053] The shaping rib 15 extends from the end away from the pressure rib 14 towards the bottom wall 11. When the electromagnetic coil is wound in the second winding area 121, it forms an outwardly protruding bending angle 122 under the action of the shaping rib 15. The bending angle 122 increases the tension of the electromagnetic coil, making it less prone to loosening. At the same time, the shaping rib 15 can also guide the electromagnetic coil in some areas on both sides of the bending angle 122, thus restricting the electromagnetic coil in the area near the bending angle 122. This makes the bending of the electromagnetic coil at the bending angle 122 more regular and smooth, and the area between the two bending angles 122 is also smoother.

[0054] Specifically, such as Figure 4 As shown, the pressure line 14 and the shaping ribs 15 on both sides are arranged in a Y-shaped structure.

[0055] It should be noted that this utility model does not limit the structure of the shaping rib 15. In a preferred embodiment, such as... Figure 4 As shown, the pressure ribs 14 are spaced apart along the circumference of the disc body 1, and there is a gap between the shaping ribs 15 at two adjacent pressure ribs 14, so that the second winding area 121 forms an extension channel 123 for the smooth extension of the conductor at the corresponding gap.

[0056] The pressure ribs 14 are arranged at intervals along the circumference of the disc body 1. The electromagnetic coil in the second winding area 121 forms a bending angle 122 at the pressure ribs 14 and extends smoothly between two adjacent pressure ribs 14, so that the electromagnetic coil is polygonal or approximately circular. Since the wire extends smoothly in the extension channel 123, the tension of the wire is small, so there is no need to restrict it by the pressure ribs 14, thereby reducing the number of pressure ribs 14, simplifying the structure of the disc body 1 and saving costs.

[0057] In this embodiment, the shaping ribs 15 are discontinuous segments, which are arranged on both sides of each pressure rib 14.

[0058] In another embodiment, such as Figure 5 As shown, the shaping ribs 15 at two adjacent pressure ribs 14 are connected to form an extension channel 123. This allows the conductors within the extension channel 123 to be confined by the shaping ribs 15 in each area of ​​the extension channel 123, improving the neatness of the conductors within the extension channel 123.

[0059] It should be noted that this utility model does not limit the extension method of the wires in the extension channel 123, as long as the extension is smooth. For example, it can extend along a straight line so that the electromagnetic coil as a whole is a polygonal structure, or it can extend with a certain arc so that each side of the polygonal structure formed by the electromagnetic coil is arc-shaped.

[0060] It is understandable that the number of pressure ribs 14 is the same as the number of bends 122 in the polygon, i.e., the number of sides of the polygon. Preferably, the number of bends 122 in the polygon is 5-8. Preferably, as follows... Figure 4 As shown, there are six pressure ribs 14, which are evenly arranged along the circumference of the disc body 1, so that the electromagnetic coil is wound in a hexagonal shape.

[0061] In a preferred embodiment, such as Figure 2 , Figure 4 As shown, the pressure rib 14 includes a first pressure part 141 and a second pressure part 142 located below the first pressure part 141. A first winding space 143 is formed between the first pressure part 141 and the arc-shaped part 12, and a second winding space 144 is formed between the second pressure part 142 and the first pressure part 141.

[0062] The electromagnetic coil in the second winding region 121 is partially wound within the first winding space 143 and partially wound within the second winding space 144, resulting in a two-layer arrangement of the electromagnetic coil in the second winding region 121. When current passes through the coil, a magnetic field is generated, and the current direction in both layers of coils is consistent. According to the right-hand screw rule, the magnetic field directions generated by the two layers of coils are also consistent, thus the magnetic fields generated by the two layers of coils will superimpose. During the superposition process, the magnetic field lines generated by adjacent electromagnetic coils reinforce each other in space, significantly increasing the overall magnetic field strength of the electromagnetic coil. In practical applications, the enhanced magnetic field can interact more efficiently with the cookware. According to the principle of electromagnetic induction, the changing magnetic field will induce a current in the cookware. The increase in magnetic field strength means an increase in the induced current generated in the cookware, resulting in more heat generation, thereby achieving faster and more efficient heating, significantly improving cooking effects, and shortening cooking time.

[0063] It should be noted that, during use, the electromagnetic coil of this utility model is located below the cookware, and the opening of the coil body 1 faces upwards. In this utility model, directional terms such as "upper" and "lower" all correspond to... Figure 1 The image shows the posture of the electromagnetic coil in its working state, not... Figure 4 The electromagnetic coil shown is in an inverted state.

[0064] Preferably, such as Figure 2 As shown, the inner and outer coils are offset radially along the disk 1 so that the two coils have overlapping and misaligned portions on the surface of the disk 1, so that the magnetic field formed by the two coils has overlapping and misaligned regions, thereby increasing the magnetic field area.

[0065] Furthermore, such as Figure 4 As shown, the first pressing part 141 and the second pressing part 142 are staggered vertically, with the shaping rib 15 on one side fixed to the first pressing part 141 and the shaping rib 15 on the other side fixed to the second pressing part 142.

[0066] The staggered left and right alignment of the upper and lower pressure sections satisfies the positioning requirements of the two layers of electromagnetic coils while enhancing the overall structural strength of the pressure rib 14 and extending the service life of the electromagnetic coil. Simultaneously, the different positioning positions of the first and second pressure sections 141 and 142 on the electromagnetic coil increase the overall limiting area and improve the limiting effect. This ensures the neatness and stability of the electromagnetic coil during winding and use, reduces uneven magnetic field distribution caused by loosening or displacement of the electromagnetic coil, and improves the efficiency of electromagnetic induction heating.

[0067] Preferably, such as Figure 4 As shown, the first pressing part 141 and the second pressing part 142 have overlapping and misaligned portions, so that the electromagnetic coil between them is partially clamped and fixed by both of them simultaneously, and partially limited by either the first pressing part 141 or the second pressing part 142.

[0068] Specifically, such as Figure 4 As shown, from this perspective, the second pressing part 142 is offset to the right by a certain distance relative to the first pressing part 141 and is fixedly connected to the shaping rib 15 on the right side, while the first pressing part 141 is fixedly connected to the shaping rib 15 on the left side. This not only improves the structural strength of the first pressing part 141 and the second pressing part 142 by utilizing the shaping rib 15, but also simplifies the structure and reduces processing difficulty through the proximity connection method.

[0069] Preferably, such as Figure 3 , Figure 4 As shown, at least part of the shaping rib 15 is provided with a hook structure 17, which forms a limiting groove 171 for the conductor to pass through.

[0070] The two layers of electromagnetic coils in the second winding area 121 are wound with a single wire. The hook structure 17 allows the outer coil to be wound after the inner coil is wound, via the limiting groove 171. Under the limiting action of the limiting groove 171, the transition between the two coils is smoother and more regular, ensuring that the outer coil can be wound with sufficient tension after the inner coil is wound, thus improving the tension effect of the inner and outer coils.

[0071] Specifically, such as Figure 4 As shown, the hook structure 17 is located on one side of the shaping rib 15 (away from the pressure rib 14) along the circumference of the disc body 1, and one of the shaping ribs 15 is provided with the hook structure 17 so that the inner and outer coils transition at a fixed position. Of course, the hook structure 17 can also be provided on each shaping rib 15 to improve the flexibility of the transition position between the inner and outer coils.

[0072] As a preferred embodiment of this utility model, such as Figure 3 , Figure 6 As shown, the electromagnetic coil also includes a bottom coil 2 wound in the first winding area 111 and a side coil 3 wound in the second winding area 121. The bottom coil 2 and the side coil 3 are wound independently on the coil body 1.

[0073] By using two independent sets of electromagnetic coils wound separately, the heating of the bottom and sides of the cookware can be independently controlled, allowing for flexible adjustment of the heating mode according to the cooking characteristics of different ingredients. When the bottom and sides are heated simultaneously, an internal and external convection tumbling heating environment is created, resulting in more even heating of the food, greatly improving its taste, and also facilitating the full release of nutrients, significantly enhancing the heating performance of the cooking appliance. Furthermore, in certain cooking states, a specific section of the electromagnetic coil can be controlled to operate independently, achieving low-power heating and saving energy.

[0074] Preferably, such as Figure 1 , Figure 3 , Figure 6 As shown, the bottom wall 11 of the disc body 1 is provided with a wire pressing rib 16, which also extends radially along the disc body 1 and is used to limit the bottom coil 2. The wire pressing rib 16 is also a double-layer structure so that the bottom coil 2 is wound in a double layer in the first winding area 111.

[0075] like Figure 3 As shown, the side coil 3 is stopped by the near end 145 of the pressure rib 14, resulting in a winding gap 19 between it and the bottom coil 2.

[0076] Furthermore, such as Figure 1 , Figure 3 , Figure 4 , Figure 6 As shown, the disk body 1 also includes a side wall 13 located above the arc-shaped portion 12. The side wall 13 is provided with a third winding area 131. There is a separation gap 18 between the side coil 3 in the second winding area 121 and the side coil 3 in the third winding area 131.

[0077] The first winding area 111 corresponds to the bottom wall 11 of the upper pot, the third winding area 131 corresponds to the side wall 13 of the pot or the transition area between the side wall 13 and the bottom wall 11, and the second winding area 121 also corresponds to the transition area. This allows the electromagnetic coils in the three winding areas to form a three-dimensional heating effect on the pot, improving the uniformity of heating of the food inside the pot. The separation gap 18, while ensuring the heating effect on the side wall 13 and the transition area of ​​the pot, can reduce the use of electromagnetic coils and save costs.

[0078] It should be noted that in this embodiment, three sets of electromagnetic coils can be wound separately in the first winding region 111, the second winding region 121, and the third winding region 131, so that the electromagnetic coils in the three regions can be heated independently. Alternatively, the side coil 3 can be extended from the second winding region 121 to the third winding region 131, so that the electromagnetic coil is wound separately in the first winding region 111 and wound together in the second winding region 121 and the third winding region 131, so that the electromagnetic coils in the second winding region 121 and the third winding region 131 can be heated together.

[0079] Specifically, such as Figure 4 As shown, the third winding area 131 is provided with multiple spacer ribs 132 arranged at intervals along the height direction of the plate 1. A winding groove 133 is formed between adjacent spacer ribs 132. A single conductor of the electromagnetic coil is located within the winding groove 133, ensuring that the upper and lower turns of conductor do not contact each other, forming a loosely wound structure. Thus, the electromagnetic coil has a tightly wound structure in the first winding area 111 and the second winding area 121, and a loosely wound structure in the third winding area 131. This combination of tightly and loosely wound structures allows for targeted heating of different areas of the cookware, improving the uniformity of heating.

[0080] As a preferred embodiment of this utility model, such as Figure 6 As shown, the electromagnetic coil also includes a magnetic strip frame 4 fixed to the coil body 1. The magnetic strip frame 4 is provided with a first magnetic strip 41, which is provided corresponding to the arc-shaped part 12, and the first magnetic strip 41 is misaligned with the wire pressing rib 14.

[0081] After the magnetic strip holder 4 is fixed to the disc body 1, the first magnetic strip 41 can also press and limit the electromagnetic coil wound in the second winding area 121. Thus, the first magnetic strip 41 and the pressure rib 14 work together to press and limit the electromagnetic coil, and the two are staggered, that is, they press different positions of the electromagnetic coil, making the pressing position of the electromagnetic coil more dispersed and even, improving the limiting effect of the electromagnetic coil, and making the electromagnetic coil fit more neatly and compliantly with the disc body 1. At the same time, the first magnetic strip 41 is given more functions to simplify the overall structure of the electromagnetic coil and save costs.

[0082] Furthermore, such as Figure 6 As shown, the magnetic strip holder 4 is also provided with a second magnetic strip 42, which is provided corresponding to the bottom wall 11. The first magnetic strip 41 and the second magnetic strip 42 are offset in the radial direction of the disk body 1.

[0083] In electromagnetic heating, the role of the magnetic strip is to guide and concentrate the magnetic field, reduce leakage, and enhance the generation of eddy currents in the cookware.

[0084] The staggered arrangement of the first magnetic strip 41 and the second magnetic strip 42 ensures that the peak values ​​of their magnetic fields are offset, promoting a smooth transition of the magnetic field on the curved surface of the arc-shaped portion 12. This results in a more uniform temperature distribution across the bottom wall 11, the arc-shaped portion 12, and the side wall 13 of the cookware. Furthermore, when the two magnetic strips are aligned, the magnetic fields generated by the electromagnetic coils in the first winding region 111 and the second winding region 121 may couple, leading to unnecessary flux competition or eddy current losses. The angled offset design of the two magnetic strips reduces electromagnetic interference between them, allowing the magnetic fields to act more independently on their respective regions, thereby improving energy conversion efficiency.

[0085] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0086] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0087] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. An electromagnetic coil for a cooking appliance, comprising a coil body, the coil body including a bottom wall and an arcuate portion surrounding the outer periphery of the bottom wall, the bottom wall being provided with a first winding area, characterized in that, The arc-shaped portion is provided with a pressure rib extending radially along the disc body. A second winding area is formed between the pressure rib and the arc-shaped portion. The pressure rib has a proximal end near the bottom wall and a distal end away from the bottom wall. The electromagnetic coil also includes a shaping rib. The shaping rib is fixed to both sides of the proximal end along the circumference of the disc body. The shaping ribs on both sides of the pressure rib are arranged at an angle so that the second winding area forms a bending angle at the pressure rib.

2. The electromagnetic coil for cooking appliances according to claim 1, characterized in that, The shaping rib has a connecting end fixed to the pressure rib, and a guiding end away from the pressure rib, the guiding end extending obliquely toward the bottom wall.

3. The electromagnetic coil for cooking appliances according to claim 2, characterized in that, The pressure ribs are spaced apart along the circumference of the disc body, and there is a gap between the shaping ribs at two adjacent pressure ribs, so that the second winding area forms an extension channel for the smooth extension of the conductor at the corresponding gap.

4. The electromagnetic coil for cooking appliances according to claim 1, characterized in that, The pressure rib includes a first pressure part and a second pressure part located below the first pressure part. A first winding space is formed between the first pressure part and the arc-shaped part, and a second winding space is formed between the second pressure part and the first pressure part.

5. The electromagnetic coil for cooking appliances according to claim 4, characterized in that, The first and second pressure lines are staggered vertically, with the shaping rib on one side fixed to the first pressure line and the shaping rib on the other side fixed to the second pressure line.

6. The electromagnetic coil for cooking appliances according to claim 4, characterized in that, At least a portion of the shaping ribs are provided with hook structures, which form a limiting groove for the passage of a conductor.

7. The electromagnetic coil for cooking appliances according to claim 1, characterized in that, The electromagnetic coil also includes a bottom coil wound in the first winding area and a side coil wound in the second winding area, wherein the bottom coil and the side coil are wound independently on the coil body.

8. The electromagnetic coil for cooking appliances according to claim 7, characterized in that, The disk body also includes a side wall located above the arc-shaped portion, the side wall being provided with a third winding area, the side coil extending from the second winding area to the third winding area, and a separation gap between the side coil in the second winding area and the side coil in the third winding area.

9. The electromagnetic coil for cooking appliances according to claim 1, characterized in that, The electromagnetic wire reel also includes a magnetic strip frame fixed to the reel body. The magnetic strip frame is provided with a first magnetic strip, which is disposed corresponding to the arc-shaped portion and is misaligned with the pressure rib.

10. The electromagnetic coil for cooking appliances according to claim 9, characterized in that, The magnetic strip holder is also provided with a second magnetic strip, which is disposed corresponding to the bottom wall, and the first magnetic strip and the second magnetic strip are offset in the radial direction of the disk body.

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