Electromagnetic heating device and cooking utensil

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses an electromagnetic heating device and a cooking utensil, the electromagnetic heating device comprises a wire coil, a wire pressing arm is arranged on the wire coil, and at least two layers of coils formed by winding wires are arranged between the wire pressing arm and the wire coil; one side, facing the wire coil, of the wire pressing arm and / or one side, facing the wire pressing arm, of the wire coil are / is provided with wire separating ribs, a winding groove is formed between every two adjacent wire separating ribs, the coil comprises a first-layer coil close to the wire separating ribs and a second-layer coil away from the wire separating ribs, and at least part of the first-layer coil is located in the winding groove; the number of turns of the first layer of coil is smaller than that of the second layer of coil, and the first layer of coil forms a heat dissipation gap at the wire separation rib, so that the heat dissipation effect of the coil is improved, the use amount of wires is reduced, and the production cost of the electromagnetic heating device is further reduced; the cooking utensil comprises a pot body and the electromagnetic heating device, the electromagnetic heating device is arranged in the pot body, and the service life of the cooking utensil is prolonged.

Description

Technical Field

[0001] This application belongs to the technical field of kitchen appliances, specifically relating to an electromagnetic heating device and a cooking utensil. Background Technology

[0002] Cooking appliances are essential kitchen appliances in daily life. In order to obtain higher heating efficiency and heating uniformity, some models use electromagnetic heating as a heating device to heat the inner pot.

[0003] Existing electromagnetic heating devices include a disc and a coil formed by wires wound around the disc. There are usually two ways to wind the wires: one is to loosely wind the wires around the disc, that is, there is a gap between two adjacent turns of wire to reduce the insulation requirements of the wires. However, this method will affect the electromagnetic induction intensity of the coil, thus affecting the heating efficiency of the electromagnetic heating device; the other is to tightly wind the wires around the disc, that is, there is contact between two adjacent turns of wire to increase the electromagnetic induction intensity of the coil, thereby increasing the heating efficiency of the electromagnetic heating device.

[0004] For designs where the wires are tightly wound around the disc, the heat dissipation efficiency of the coil is affected because adjacent turns of wire are in contact with each other. This prevents the heat in the middle of the coil from dissipating in time, which can easily cause the coil temperature to become too high, leading to deformation of the disc and affecting the service life of the electromagnetic heating device.

[0005] To ensure the service life of electromagnetic heating devices, the number of wire strands is usually increased to reduce the resistance of the coil during operation, thereby reducing the heat generated by the coil and lowering the temperature of the plate. However, increasing the number of wire strands increases the amount of wire used, which in turn increases the production cost of the electromagnetic heating device. Utility Model Content

[0006] This application provides an electromagnetic heating device and cooking appliance to improve the heat dissipation effect of the coil and reduce the production cost of the electromagnetic heating device.

[0007] The technical solution adopted in this application is as follows:

[0008] An electromagnetic heating device includes a coil with a pressing arm on it. At least two layers of coils made of wire are disposed between the pressing arm and the coil. A wire-separating rib is disposed on the side of the pressing arm facing the coil and / or the side of the coil facing the pressing arm. A winding groove is formed between adjacent wire-separating ribs. The coil includes a first layer of coil near the wire-separating rib and a second layer of coil away from the wire-separating rib. At least a portion of the first layer of coil is located in the winding groove. The number of turns of the first layer of coil is less than the number of turns of the second layer of coil. The first layer of coil forms a heat dissipation gap at the wire-separating rib.

[0009] The electromagnetic heating device described in this application also includes the following additional technical features:

[0010] The width B of the winding groove and the diameter D of the conductor satisfy the condition: B ≥ 1.1D.

[0011] At least two turns of the wire are provided in the winding groove.

[0012] In at least one layer of the coil away from the spacer rib, two adjacent turns of the conductor are arranged in contact.

[0013] The coil and / or the pressure arm have a clearance surface opposite to the wire separator, and a winding gap is formed between the wire separator and the clearance surface. The height L of the winding gap and the diameter D of the conductor satisfy: L≥D.

[0014] A wire-receiving groove is formed between the wire pressing arm and the wire spool, and a guide surface is provided on the side of the wire-receiving groove facing the opening of the wire-receiving groove.

[0015] The wire divider has a connecting section connected to the wire pressing arm or the wire reel and a guide section provided on the connecting section. The height H of the connecting section and the diameter D of the wire satisfy: H < 1 / 2D.

[0016] The width A of the separator bar and the diameter D of the conductor satisfy: A≥0.8D.

[0017] The wire divider includes a first rib on the wire pressing arm and a second rib on the wire reel, with the first rib and the second rib being staggered vertically.

[0018] This application also discloses a cooking appliance, including a pot body and the aforementioned electromagnetic heating device, which is disposed inside the pot body.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0020] 1. The electromagnetic heating device of this application includes a coil, on which a pressing arm is provided. At least two layers of coils made of wire are provided between the pressing arm and the coil. A wire-separating rib is provided on the side of the pressing arm facing the coil and / or on the side of the coil facing the pressing arm. A winding groove is formed between adjacent wire-separating ribs. The coil includes a first layer of coil near the wire-separating rib and a second layer of coil away from the wire-separating rib. At least a portion of the first layer of coil is located within the winding groove. The number of turns in the first layer of coil is less than the number of turns in the second layer of coil. A heat dissipation gap is formed at the wire-separating rib in the first layer of coil. Because the coil has at least two layers, the working resistance of the coil is reduced, thereby reducing the heat generated when the coil is working, reducing the heat transferred from the coil to the coil, and thus reducing the temperature rise of the coil, preventing possible deformation of the coil. This design improves the lifespan of the coil, thus extending the lifespan of the electromagnetic heating device. Simultaneously, the first layer of coil forms a heat dissipation gap at the wire rib, allowing the heat generated during coil operation to dissipate quickly through this gap, improving heat dissipation and effectively reducing the coil's operating temperature. This further reduces the heat transferred from the coil to the coil, further lowering the coil's temperature rise and preventing potential deformation, thereby increasing the lifespan of the electromagnetic heating device and enhancing the user experience. Furthermore, the combination of the first and second layers of coils allows for both loosely wound and tightly wound layers within the multi-layered coil system. This improves heat dissipation while reducing the amount of wire used, thereby lowering the production cost of the electromagnetic heating device.

[0021] 2. As a preferred embodiment of this application, the width B of the winding groove and the diameter D of the wire satisfy: B≥1.1D, so that there is a small amount of movement between the wire located in the winding groove and the side wall of the partition rib, thereby allowing the wire to automatically adjust under the action of the side wall of the partition rib to reduce the squeezing force between the wire and the partition rib, thereby reducing the risk of wire damage, and thus reducing the assembly difficulty and production cost of the electromagnetic heating device, and improving the service life of the electromagnetic heating device.

[0022] 3. In a preferred embodiment of this application, the coil and / or the pressure arm have a clearance surface opposite to the wire separator. A winding gap is formed between the wire separator and the clearance surface. The height L of the winding gap and the diameter D of the conductor satisfy: L≥D. That is, when the conductor is wound on the coil, the conductor enters the receiving groove formed by the pressure arm and the coil through the winding gap. Since L≥D, the wire separator and the conductor are clearance-avoided to prevent interference between them. This makes it easier for the conductor to enter the receiving groove, thereby reducing the winding difficulty of the conductor, improving the winding efficiency of the conductor, and thus improving the production efficiency of the electromagnetic heating device and reducing the production cost of the electromagnetic heating device.

[0023] 4. In a preferred embodiment of this application, a wire-receiving groove is formed between the wire-pressing arm and the wire reel. A guide surface is provided on the side of the wire-separating rib facing the opening of the wire-receiving groove. When the wire is wound onto the reel, the guide surface guides the wire, making it easier for the wire to enter the interior of the wire-receiving groove. This avoids the sidewalls of the wire-separating rib from obstructing the wire, thereby further improving the winding efficiency and reducing the production cost of the electromagnetic heating device. Simultaneously, the guide surface can also avoid contact with the wire located in the winding groove, increasing the movement range between the wire and the wire-separating rib. This further avoids the wire-separating rib potentially squeezing the wire, reducing the difficulty of winding the wire and the risk of potential wire damage, thus further reducing the production cost of the electromagnetic heating device.

[0024] 5. In a preferred embodiment of this application, the wire separator has a connecting section connected to the wire pressing arm or the wire reel and a guide section provided on the connecting section. The height H of the connecting section and the diameter D of the wire satisfy: H < 1 / 2D. That is, when the wire is wound on the wire reel, the guide section guides the wire so that the wire can enter the wire groove more easily, further improving the winding efficiency of the wire and further reducing the production cost of the electromagnetic heating device. At the same time, since H < 1 / 2D, the wire can pass over the wire separator more easily, so as to avoid the situation where the wire separator blocks the wire and prevents the wire from moving to the inside of the wire separator when the wire is wound, thereby reducing the winding difficulty of the wire and improving the production efficiency of the electromagnetic heating device. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0026] Figure 1 This is an exploded structural diagram of the electromagnetic heating device according to one embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the electromagnetic heating device according to one embodiment of this application;

[0028] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0029] Figure 4 This is a cross-sectional view of the electromagnetic heating device according to one embodiment of this application;

[0030] Figure 5 for Figure 4 Enlarged view of part B in the middle;

[0031] Figure 6This is a cross-sectional view of the reel described in one embodiment of this application;

[0032] Figure 7 for Figure 6 Enlarged view of section C;

[0033] Figure 8 This is a partial structural schematic diagram of the electromagnetic heating device according to another embodiment of this application;

[0034] Figure 9 This is a partial structural diagram of the coil described in another embodiment of this application.

[0035] Figure label:

[0036] 1. Coil; 11. Clearance surface;

[0037] 2. Line clamping arm; 21. Fixing post;

[0038] 3. Coil; 31. Wire; 32. Heat dissipation gap;

[0039] 4. Divider rib; 41. Connecting section; 411. Limiting plane; 42. Guide section; 421. Guide surface; 422. Transition arc surface; 43. Winding groove;

[0040] 5. Magnetic strip holder; 51. Extension arm; 511. Magnetic component; 512. Connecting rib. Detailed Implementation

[0041] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0043] Furthermore, it should be understood in the description of this application 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, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0044] In this application, unless otherwise expressly 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 application according to the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the 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 application. 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 can be combined in any suitable manner in one or more embodiments or examples.

[0046] Reference Figures 1 to 9 An electromagnetic heating device includes a coil 1, on which a pressing arm 2 is provided. At least two layers of coils 3 made of wire 31 are provided between the pressing arm 2 and the coil 1. A wire-separating rib 4 is provided on the side of the pressing arm 2 facing the coil 1 and / or on the side of the coil 1 facing the pressing arm 2. A winding groove 43 is formed between adjacent wire-separating ribs 4. The coil 3 includes a first layer of coil near the wire-separating rib 4 and a second layer of coil away from the wire-separating rib 4. At least a portion of the first layer of coil is located in the winding groove 43. The number of turns of the first layer of coil is less than the number of turns of the second layer of coil. A heat dissipation gap 32 is formed at the wire-separating rib 4 for the first layer of coil.

[0047] Because coil 3 has at least two layers, its operating resistance is reduced, thereby reducing the heat generated during operation. This reduces the heat transferred from coil 3 to coil 1, thus lowering the temperature rise of coil 1 and preventing deformation. This extends the lifespan of coil 1 and consequently, the lifespan of the electromagnetic heating device. Simultaneously, the first layer of coil forms a heat dissipation gap 32 at the insulating rib 4, allowing the heat generated during operation to dissipate quickly. This improves heat dissipation, effectively lowers the operating temperature of coil 3, further reduces the heat transferred from coil 3 to coil 1, and further lowers the temperature rise of coil 1, preventing deformation and extending the lifespan of the electromagnetic heating device, thus improving the user experience. Furthermore, the combination of the first and second layers of coil allows for both loosely wound and tightly wound layers within the multi-layered coil 3. This improves heat dissipation while effectively reducing the amount of wire 31 used, thereby lowering the production cost of the electromagnetic heating device.

[0048] This application does not specify the location of the dividing rib 4, and it can be implemented in any of the following embodiments:

[0049] Implementation Method 1, in this implementation method, refer to Figures 1 to 7 The wire-separating rib 4 is provided on the wire-pressing arm 2 so that the heat dissipation gap 32 is set behind the wire tray 1. That is to say, the heat dissipation gap 32 is directly exposed to the air to further improve the heat dissipation effect of the coil 3.

[0050] In this embodiment, the connection method between the wire divider 4 and the pressure arm 2 is not specifically limited. Preferably, the wire divider 4 and the pressure arm 2 are integrally formed to reduce the number of components required for assembly during the production of the electromagnetic heating device, thereby improving the production efficiency of the electromagnetic heating device. Simultaneously, it also increases the connection stability between the wire divider 4 and the pressure arm 2, thus extending the service life of the electromagnetic heating device. In other embodiments, the wire divider 4 can also be connected to the pressure arm 2 by other methods such as adhesive bonding, fastener fixing, or snap-fit ​​structure fixing.

[0051] In a preferred embodiment, the coil 1 is provided with a boss, and the coil 3 on the layer near the coil 1 rests against the boss, so that a heat dissipation channel is formed between the coil 3 on the layer near the coil 1 and the coil 1. This allows the heat generated by the coil 3 on the layer near the coil 1 to be quickly dissipated through the heat dissipation channel, thereby further improving the heat dissipation effect of the coil 3, thereby further reducing the amount of wire 31 used, further reducing the production cost of the electromagnetic heating device, and further increasing the service life of the electromagnetic heating device.

[0052] Furthermore, the boss is positioned opposite to the pressure arm 2 to ensure the height of the heat dissipation channel, thereby ensuring the heat dissipation effect of the coil 3, reducing the temperature rise of the coil 1, and increasing the service life of the electromagnetic heating device.

[0053] Furthermore, the boss has a mating plane, and a layer of coil 3 close to the coil spool 1 mats against the mating plane to increase the contact area between the coil 3 and the boss, thereby increasing the stability of the coil 3 and reducing the pressure between the coil 3 and the boss, thus increasing the service life of the coil 3.

[0054] This application does not specifically limit the connection relationship between the boss and the coil 1. Preferably, the boss and the coil 1 are integrally formed to increase the connection stability between the boss and the coil 1, thereby increasing the service life of the electromagnetic heating device. Simultaneously, it reduces the number of components required for assembly, improving assembly efficiency and reducing production costs. In other embodiments, the boss can also be connected to the coil 1 by adhesive or other fixing methods, or even by the pressure of the coil 3 against the coil 1.

[0055] Implementation Method Two: In this implementation method, refer to... Figure 8 and Figure 9 The spacer rib 4 is disposed on the coil 1 so that the heat dissipation gap 32 is close to the coil 1, thereby allowing the heat inside the multi-layer coil 3 to dissipate more quickly through the heat dissipation gap 32, further improving the heat dissipation effect of the coil 3. Simultaneously, it greatly improves the heat dissipation effect of the coil 3 closest to the coil 1, significantly reducing the temperature of the coil 3 closest to the coil 1, thus greatly reducing the heat transferred from the coil 3 closest to the coil 1 to the coil 1, significantly reducing the risk of deformation of the coil 1, and further increasing the service life of the electromagnetic heating device. In this embodiment, the connection method between the spacer rib 4 and the coil 1 is not specifically limited. Preferably, the spacer rib 4 and the coil 1 are integrally formed to reduce the number of components required for assembly during the production of the electromagnetic heating device, thereby improving the production efficiency of the electromagnetic heating device. It also increases the connection stability between the spacer rib 4 and the coil 1, thereby increasing the service life of the electromagnetic heating device. In other embodiments, the spacer rib 4 can also be connected to the pressure arm 2 by other methods such as adhesive bonding, fastener fixing, or snap-fit ​​structure fixing.

[0056] In this embodiment, the positional relationship between the spacer 4 and the pressure arm 2 is not specifically limited. Preferably, the spacer 4 and the pressure arm 2 are arranged opposite to each other to increase the stability of the coil 3 in the layer closest to the spacer 4. In other embodiments, the spacer 4 and the pressure arm 2 may also be offset from each other in the circumferential direction of the coil 1.

[0057] In the third embodiment, the wire separator 4 includes a first rib on the wire pressing arm 2 and a second rib on the coil spool 1, so that both the coil 3 near the wire pressing arm 2 and the coil 3 near the coil spool 1 have heat dissipation gaps 32, thereby further improving the heat dissipation effect of the coil 3.

[0058] This application does not specifically limit the positional relationship between the first and second ribs. Preferably, the first and second ribs are staggered vertically, that is, they are staggered along the extension direction of the pressure arm 2, so that the heat dissipation gap 32 in the coil 3 near the pressure arm 2 is staggered with the heat dissipation gap 32 in the coil 3 near the coil spool 1, thereby further improving the heat dissipation effect of the coil 3. In other embodiments, the first and second ribs may also be arranged vertically opposite each other.

[0059] This application does not specify the number of layers in coil 3. Preferably, in the above-described embodiments one and two, refer to... Figure 4 , Figure 5 and Figure 8 The coil 3 has two layers, meaning the second layer consists of one coil layer, to reduce the amount of wire used and lower the production cost of the electromagnetic heating device. When using the electromagnetic heating device in Embodiment 1, the first coil layer is the lower coil near the pressure arm 2, and the second coil layer is the upper coil near the coil spool 1. When using the electromagnetic heating device in Embodiment 2, the first coil layer is the upper coil near the coil spool 1, and the second coil layer is the lower coil near the pressure arm 2. In other embodiments, the second coil layer may also have two, three, or other layers.

[0060] In the third embodiment described above, preferably, the coil 3 has three layers. That is, the second layer coil is one layer located between the two first layer coils, in order to reduce the amount of wire 31 used, thereby reducing the cost of the electromagnetic heating device and increasing its service life. When using the electromagnetic heating device, the first layer coil is the lower layer coil near the pressure arm 2 and the upper layer coil near the coil spool 1, and the second layer coil is the middle layer coil located between the upper and lower layer coils. In other embodiments, the second layer coil may also have two layers, three layers, etc.

[0061] This application does not specify the number of spacer ribs 4. Preferably, more than two spacer ribs 4 are provided along the extension direction of the pressure arm 2. That is, multiple spacer ribs 4 are provided at radial intervals along the coil 1. The conductors 31 in the coil 3 near the layer of spacer ribs 4 are located in the winding groove 43, so that multiple heat dissipation gaps 32 are formed in the coil 3 near the layer of spacer ribs 4, so as to further improve the heat dissipation effect of the coil 3, thereby further reducing the operating temperature of the coil 3, further reducing the heat transferred from the coil 3 to the coil body, further reducing the temperature rise of the coil 1, and further increasing the service life of the electromagnetic heating device. In other embodiments, only two spacer ribs 4 may be provided along the extension direction of the pressure arm 2.

[0062] In a preferred embodiment, refer to Figures 1 to 9 The width B of the winding groove 43 and the diameter D of the wire 31 satisfy: B≥1.1D.

[0063] B≥1.1D, so that there is a small amount of movement between the conductor 31 located in the winding groove 43 and the side wall of the partition rib 4, thereby enabling the conductor 31 to automatically adjust under the action of the side wall of the partition rib 4, so as to reduce the squeezing force between the conductor 31 and the partition rib 4, thereby reducing the risk of damage to the conductor 31, and thus reducing the assembly difficulty and production cost of the electromagnetic heating device, and improving the service life of the electromagnetic heating device.

[0064] This application does not specify the quantitative relationship between the winding groove 43 and the wire 31. Preferably, refer to... Figure 4 , Figure 5 and Figure 8 At least two turns of wire 31 are provided in the winding groove 43, so that the coil 3 near the separator rib 4 has both a densely wound area and a sparsely wound area of ​​wire 31. This improves the winding efficiency of the wire 31 while ensuring the heat dissipation effect of the coil 3, thereby improving the production efficiency of the electromagnetic heating device. In other embodiments, only one turn of wire 31 may be provided in the winding groove 43 to further improve the heat dissipation efficiency of the coil 3.

[0065] In a preferred embodiment, refer to Figure 4 , Figure 5 and Figure 8 In at least one layer of coil 3 away from the separator rib 4, two adjacent turns of wire 31 are arranged in contact. That is, two adjacent turns of wire 31 in the second layer of coil are arranged in contact. This results in both densely wound coils 3 and loosely wound coils 3 in the multi-layer coil 3. This reduces the difficulty of winding the wire 31 while ensuring the heat dissipation effect of the coil 3, thereby improving the winding efficiency of the wire 31, and thus improving the production efficiency of the electromagnetic heating device and reducing the production cost of the electromagnetic heating device.

[0066] In a preferred embodiment, refer to Figure 7 and Figure 9 The coil 1 and / or the pressure arm 2 have a clearance surface 11 opposite to the wire separator 4. A winding gap is formed between the wire separator 4 and the clearance surface 11. The height L of the winding gap and the diameter D of the conductor 31 satisfy: L≥D.

[0067] Specifically, when the wire 31 is wound around the coil 1, the wire 31 enters the groove formed by the pressure arm 2 and the coil 1 through the winding gap. Since L≥D, the wire separator 4 and the wire 31 are made to avoid interference between them. This makes it easier for the wire 31 to enter the groove formed between the pressure arm 2 and the coil 1, thereby reducing the winding difficulty of the wire 31, improving the winding efficiency of the wire 31, and thus improving the production efficiency of the electromagnetic heating device and reducing the production cost of the electromagnetic heating device.

[0068] It should be noted that, referring to Figure 7 When the wire divider 4 is provided on the wire pressing arm 2, the wire reel 1 has a clearance surface 11 opposite to the wire divider 4; refer to Figure 9 When the wire divider 4 is provided on the wire reel 1, the pressing arm 2 has a clearance surface 11 opposite to the wire divider 4; when the wire divider 4 is provided on the pressing arm 2 and the wire reel 1 respectively, both the pressing arm 2 and the wire reel 1 have clearance surfaces 11 opposite to the wire divider 4.

[0069] In a preferred embodiment, refer to Figure 7 and Figure 8 A wire-receiving groove is formed between the wire-pressing arm 2 and the wire reel 1. A guide surface 421 is provided on the side of the wire-receiving groove facing the opening of the wire-receiving groove. When the wire 31 is wound onto the wire reel 1, the guide surface 421 guides the wire 31, making it easier for the wire 31 to enter the interior of the wire-receiving groove. This avoids the sidewall of the wire-receiving rib 4 obstructing the wire 31, thereby further improving the winding efficiency of the wire 31 and further reducing the production cost of the electromagnetic heating device. Simultaneously, the guide surface 421 can also avoid contact with the wire 31 located in the winding groove 43, increasing the movement range between the wire 31 and the wire-receiving rib 4. This further avoids the wire-receiving rib 4 potentially squeezing the wire 31, thereby reducing the winding difficulty of the wire 31 and the risk of potential damage to the wire 31, further reducing the production cost of the electromagnetic heating device.

[0070] This application does not specifically limit the structure of the guide surface 421; preferably, refer to... Figure 7 When the wire divider 4 is provided on the wire pressing arm 2, the guide surface 421 is a plane inclined towards the inside of the wire receiving groove along the direction from the wire pressing arm 2 to the wire reel 1; refer to Figure 8When the wire separator 4 is provided on the wire reel 1, the guide surface 421 is a plane inclined towards the inside of the wire groove along the direction from the wire reel 1 to the wire pressing arm 2, so as to further increase the guiding effect of the guide surface 421 on the wire 31, thereby further reducing the winding difficulty of the wire 31 and further improving the production efficiency of the electromagnetic heating device. In other embodiments, the guide surface 421 can also be an arc surface or other structures, as long as it can guide the wire 31.

[0071] In a preferred embodiment, refer to Figure 7 A limiting plane 411 is provided on the side of the wire separator 4 away from the opening of the wire groove, so that the limiting plane 411 blocks the wire 31 located on the side of the wire separator 4 away from the opening of the wire groove, thereby increasing the stability of the wire 31 in the winding groove 43, thereby increasing the stability of the coil 3, and thus improving the service life of the electromagnetic heating device; at the same time, it can also reduce the difficulty of winding the wire 31, so as to avoid the wire 31 breaking during winding, and further improve the production efficiency of the electromagnetic heating device.

[0072] In a preferred embodiment, refer to Figure 7 and Figure 9 The wire divider 4 has a connecting section 41 connected to the wire pressing arm 2 or the wire reel 1 and a guide section 42 provided on the connecting section 41. The height H of the connecting section 41 and the diameter D of the conductor 31 satisfy: H < 1 / 2D.

[0073] Specifically, refer to Figure 7 When the dividing rib 4 is installed on the pressing arm 2, the connecting section 41 is connected to the pressing arm 2; refer to Figure 9 When the wire divider 4 is installed on the wire reel 1, the connecting section 41 is connected to the wire reel 1.

[0074] The guide surface 421 is provided on the guide section 42 so that when the wire 31 is wound on the wire spool 1, the guide section 42 guides the wire 31 so that the wire 31 can enter the wire groove more easily, thereby improving the winding efficiency of the wire 31 and further reducing the production cost of the electromagnetic heating device. At the same time, since H < 1 / 2D, the wire 31 can pass over the wire separator 4 more easily, so as to avoid the situation where the wire separator 4 blocks the wire 31 during winding, preventing the wire 31 from moving to the inside of the wire separator 4, thereby reducing the winding difficulty of the wire 31 and improving the production efficiency of the electromagnetic heating device.

[0075] The better one is to refer to Figure 7The end of the guide section 42 facing away from the connecting section 41 has a transition arc surface 422. That is, the end face of the guide section 42 facing away from the connecting section 41 is an arc surface, so that the end of the guide section 42 is smoother. This avoids the possibility that the end of the guide section 42 is too sharp and may damage the wire 31, thereby avoiding the need to replace the wire 31 and reducing the production cost of the electromagnetic heating device.

[0076] This application does not specify a particular width for the spacer bar 4; preferably, refer to... Figure 7 The width A of the partition rib 4 and the diameter D of the conductor 31 satisfy A ≥ 0.8D, which increases the width of the heat dissipation gap 32, thereby further improving the heat dissipation effect of the coil 3. Simultaneously, it further reduces the amount of conductor 31 used, thus further reducing the production cost of the electromagnetic heating device. Furthermore, it ensures the structural strength of the partition rib 4, increasing its stability and thus extending the service life of the electromagnetic heating device, thereby improving the user experience. Of course, in other embodiments, the width A of the partition rib 4 and the diameter D of the conductor 31 can also be set to satisfy A < 0.8D.

[0077] In a preferred embodiment, a pressure-reducing arc surface is provided at the edge of the pressure arm 2 to increase the contact area between the edge of the pressure arm 2 and the coil 3, thereby reducing the pressure between the coil 3 and the edge of the pressure arm 2. This avoids the possibility that the coil 3 may be damaged due to high pressure, thereby reducing the production cost of the electromagnetic heating device and increasing the service life of the electromagnetic heating device.

[0078] In a preferred embodiment, refer to Figure 1 and Figure 2 Multiple pressure arms 2 are arranged at intervals along the circumference of the coil 1 to increase the limiting points of the coil 3, thereby increasing the connection stability between the coil 3 and the coil body, and thus improving the quality of the electromagnetic heating device, so as to improve the service life of the electromagnetic heating device.

[0079] In a preferred embodiment, refer to Figures 1 to 4 The electromagnetic heating device also includes a magnetic strip frame 5 disposed on the wire reel 1. The magnetic strip frame 5 has multiple extension arms 51, each extension arm 51 is provided with a magnetic element 511 to increase the heating efficiency of the electromagnetic heating device. The multiple extension arms 51 are staggered with the multiple pressing arms 2 along the circumference of the wire reel 1 to balance the force on the electromagnetic heating device and increase the stability of the electromagnetic heating device.

[0080] Furthermore, refer to Figure 1 and Figure 2The bottom of the coil 1 has a bottom winding area, and the side wall of the coil 1 has a side winding area. Two sets of wire pressing arms 2 are provided, which are respectively located in the bottom winding area and the side winding area. The magnetic strip frame 5 has a connecting rib 512 connected to the extension arm 51. A fixing post 21 is provided on the wire pressing arm 2 corresponding to the side winding area. A screw threaded to the fixing post 21 is passed through the connecting rib 512 to realize the fixed connection between the magnetic strip frame 5 and the coil 1, thereby increasing the stability of the magnetic strip frame 5 and facilitating the fixing of the magnetic strip frame 5.

[0081] The better one is to refer to Figure 1 and Figure 2 The two ends of the connecting rib 512 are respectively connected to two adjacent extension arms 51, so that the connecting rib 512 connects the two adjacent extension arms 51 into one, thereby increasing the stability of the extension arms 51, thereby increasing the structural strength of the magnetic strip frame 5, and further increasing the service life of the electromagnetic heating device.

[0082] The better one is to refer to Figure 2 Each wire pressing arm 2 in the corresponding side winding area is provided with a fixing post 21, and multiple screws are provided for the fixing post 21 to increase the connection points between the magnetic strip frame 5 and the wire spool 1, thereby further increasing the connection stability between the magnetic strip frame 5 and the wire spool 1, and further increasing the service life of the electromagnetic heating device.

[0083] Furthermore, refer to Figure 1 and Figure 2 The pressure arm 2 located in the bottom winding area and the pressure arm 2 located in the side winding area are offset in the circumferential direction of the coil 1 so that the pressure arm 2 located in the bottom winding area and the pressure arm 2 located in the side winding area avoid each other, so as to facilitate the winding of the wire 31 into the bottom winding area, thereby improving the winding efficiency of the wire 31 and further improving the production efficiency of the electromagnetic heating device.

[0084] This application does not specifically limit the connection method between the fixing post 21 and the pressure arm 2. Preferably, the fixing post 21 and the pressure arm 2 are integrally formed to reduce the number of parts required for assembling the electromagnetic heating device, improve the production efficiency of the electromagnetic heating device, and also increase the connection stability between the fixing post 21 and the pressure arm 2. In other embodiments, the fixing post 21 can also be threadedly connected to the pressure arm 2.

[0085] It should be noted that the divider 4 can be set only in the bottom winding area, or only in the side winding area, or even separately in the bottom winding area and the side winding area.

[0086] This application also discloses a cooking appliance, which includes a pot body and the aforementioned electromagnetic heating device, wherein the electromagnetic heating device is disposed inside the pot body.

[0087] The use of the aforementioned electromagnetic heating device improves the heat dissipation efficiency of coil 3, reduces the production cost of cooking appliances, and increases the service life of cooking appliances.

[0088] This application does not specifically limit the type of cooking appliance, which can be an induction cooker, rice cooker, pressure cooker, or other kitchen appliances that use electromagnetic heating.

[0089] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0090] 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.

[0091] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An electromagnetic heating device, comprising a wire drum, on which a wire pressing arm is provided, characterized in that: At least two layers of coils wound with conductive wire are arranged between the wire pressing arm and the wire drum, wire spacing ribs are arranged on the side of the wire pressing arm facing the wire drum and / or on the side of the wire drum facing the wire pressing arm, and winding grooves are formed between adjacent wire spacing ribs. The coil includes a first layer of coil close to the wire spacing ribs and a second layer of coil away from the wire spacing ribs, at least a portion of the first layer of coil is located in the winding groove, the number of turns of the first layer of coil is less than the number of turns of the second layer of coil, and the first layer of coil forms a heat dissipation gap at the wire spacing ribs.

2. An electromagnetic heating device according to claim 1, characterized in that: The width B of the winding groove and the diameter D of the conductor satisfy: B≥1.1D.

3. The electromagnetic heating device according to claim 1, characterized in that: At least two turns of the conductive wire are arranged in the winding groove.

4. The electromagnetic heating device according to claim 1, characterized in that: The two adjacent turns of the conductive wires in at least one layer of the coil away from the wire-isolating ribs are arranged in contact with each other.

5. The electromagnetic heating device according to claim 1, characterized in that: The wire drum and / or the wire pressing arm has an avoidance surface opposite to the wire spacing rib, a winding gap is formed between the wire spacing rib and the avoidance surface, and a height L of the winding gap and a diameter D of the wire satisfy: L≥D.

6. The electromagnetic heating device according to claim 1, characterized in that: A wire accommodating groove is formed between the wire pressing arm and the wire drum, and a guide surface is arranged on a side of the wire separating rib facing the opening of the wire accommodating groove.

7. The electromagnetic heating device according to claim 1, characterized in that: The wire separator comprises a connecting section connected to the wire pressing arm or the wire drum and a guiding section arranged on the connecting section, and a height H of the connecting section and a diameter D of the wire satisfy: H<1 / 2D.

8. The electromagnetic heating device according to claim 1, characterized in that: The width A of the wire separator and the diameter D of the wire satisfy: A≥0.8D.

9. The electromagnetic heating device according to claim 1, characterized in that: The wire-separating ribs include a first convex rib provided on the wire-pressing arm and a second convex rib provided on the wire drum, and the first convex rib and the second convex rib are staggered up and down.

10. A cooking utensil, comprising a pot, characterized in that: It also includes the electromagnetic heating device described in any one of claims 1 to 9, wherein the electromagnetic heating device is arranged inside the pot body.

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