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 coil is wound on the wire coil, a supporting boss and a wire pressing rib are arranged on the surface of the wire coil, the coil is wound on the inner side of the wire pressing rib, the coil abuts against the supporting boss, the supporting boss is arranged corresponding to the wire pressing rib, and the wire pressing rib is arranged on the wire coil. The coil forms a close-fitting area between the wire pressing rib and the supporting boss, and a heat dissipation gap is formed in the area outside the supporting boss so that heat generated by the coil can be dissipated through the heat dissipation gap, the heat dissipation efficiency of the coil can be improved, the heating efficiency of the electromagnetic heating device can be guaranteed, and the service life of the cooking utensil provided with the electromagnetic heating device can be prolonged. The production difficulty is reduced; the cooking utensil comprises a pot body and the electromagnetic heating device, and the electromagnetic heating device is arranged in the pot body, so that the cooking efficiency of the cooking utensil is guaranteed, the service life of the cooking utensil is prolonged, and the production difficulty of the cooking utensil is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of kitchen appliances, and specifically relates to an electromagnetic heating device and a cooking utensil. Background Art

[0002] Cooking utensils are essential household appliances in people's daily lives. They include a pot body with a heating device and an inner pot located above the heating device. In order to obtain higher heating efficiency and heating uniformity, some high-end models use electromagnetic heating as a heating device to heat the inner pot using electromagnetic heating.

[0003] The existing electromagnetic heating device includes a wire drum rack, a coil wound on the wire drum rack, and a magnetic bar rack installed with magnetic strips and used to press the coil. Usually, the coil is directly placed on the wire drum rack, that is, there is no gap between the coil and the wire drum, which in turn affects the heat dissipation efficiency of the coil, causing the coil to easily reach high temperature, thereby affecting the heating efficiency of the electromagnetic heating device; in addition, there are generally requirements for the distance between the coil and the bottom of the inner pot. Due to the constraints of the wire drum rack structure, the distance between the coil and the bottom of the inner pot is difficult to adjust, which increases the difficulty of producing cooking utensils. Utility Model Content

[0004] The present application provides an electromagnetic heating device and a cooking utensil to improve the heat dissipation efficiency of the coil, ensure the heating efficiency of the electromagnetic heating device, and reduce the production difficulty of the cooking utensil.

[0005] The technical solution adopted in this application is:

[0006] An electromagnetic heating device includes a wire drum, on which a coil is wound, and a support boss and a wire pressing rib are arranged on the surface of the wire drum. The coil is wound on the inner side of the wire pressing rib and the coil rests on the support boss. The support boss is arranged corresponding to the wire pressing rib, so that the coil forms a tight fit area between the wire pressing rib and the support boss, and forms a heat dissipation gap in the area outside the support boss.

[0007] The electromagnetic heating device described in this application also includes the following additional technical features:

[0008] The wire drum also includes a fixed bracket, which is used to fix the magnetic strip. The fixed bracket has a wire pressing arm for pressing the coil, and the wire pressing arm is arranged corresponding to the area outside the supporting boss.

[0009] The supporting bosses are arranged on the bottom wall of the wire drum and are spaced apart along the circumference of the wire drum. The wire pressing arms are spaced apart along the circumference of the wire drum and are staggered with the supporting bosses in the circumference of the wire drum.

[0010] The width of the supporting boss is greater than the width of the pressing rib.

[0011] The wire pressing rib comprises a fixed end fixedly connected to the wire drum and a free end opposite to the fixed end, and the free end is provided with a guiding arc surface.

[0012] The height H of the supporting boss satisfies: 0.2mm≤H≤1mm.

[0013] The supporting boss has a supporting plane, and the coil rests on the supporting plane.

[0014] A transition arc surface is arranged at the edge of the supporting boss.

[0015] The bottom wall of the wire drum has a bottom winding area, and the side wall of the wire drum has a side winding area. A connecting column is arranged between the bottom winding area and the side winding area, and the connecting column has a contact end facing the side winding area. At least one side of the contact end is provided with a limiting rib extending along the circumference of the side winding area.

[0016] The present application also discloses a cooking utensil, comprising a pot body and the above-mentioned electromagnetic heating device, wherein the electromagnetic heating device is arranged inside the pot body.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0018] 1. The electromagnetic heating device in the present application includes a wire drum, on which a coil is wound, and a support protrusion and a wire pressing rib are arranged on the surface of the wire drum. The coil is wound on the inner side of the wire pressing rib, and the coil rests on the support protrusion. The support protrusion is arranged corresponding to the wire pressing rib, so that the coil forms a tight fit area between the wire pressing rib and the support protrusion, and a heat dissipation gap is formed in the area outside the support protrusion. When the electromagnetic heating device is working, the heat generated by the coil is dissipated through the heat dissipation gap to improve the heat dissipation efficiency of the coil and reduce the temperature of the coil so that the coil works at a relatively low temperature, thereby ensuring the heating efficiency of the electromagnetic heating device; in addition, when adjusting the distance between the coil and the bottom of the inner pot, the mold used for the production line drum can be adjusted to adjust the height of the support protrusion, so that after the coil rests on the support protrusion, the distance between the coil and the bottom of the inner pot is the desired distance, thereby reducing the production difficulty of the cooking appliance equipped with the electromagnetic heating device.

[0019] 2. As a preferred embodiment of the present application, the wire reel also includes a fixed bracket, which is used to fix the magnetic strip, and the fixed bracket has a wire pressing arm for pressing the coil, and the wire pressing arm is arranged in an area corresponding to the area outside the supporting boss, so that the area where the coil contacts the wire pressing arm has a certain deformation space, so that the coil can deform according to the magnitude of the force applied by the wire pressing arm to itself, and then the wire pressing arm and the coil are in elastic contact, so as to reduce the pressure between the wire pressing arm and the coil and avoid the risk of damage to the coil. After the coil is deformed, the coil becomes more solid, which increases the stability of the coil, thereby increasing the service life of the cooking utensil equipped with the electromagnetic heating device.

[0020] 3. As a preferred embodiment of the present application, the width of the support boss is greater than the width of the wire pressing rib, so as to increase the contact area between the support boss and the coil, and then reduce the pressure between the coil and the support boss to increase the service life of the coil. At the same time, it can also increase the friction between the coil and the support boss, thereby increasing the connection stability between the coil and the support boss, and then increase the stability of the coil, so as to ensure the heating efficiency and service life of the electromagnetic heating device, thereby improving the user experience.

[0021] 4. As a preferred embodiment of the present application, the height H of the supporting boss satisfies: 0.2mm≤H≤1mm. On the one hand, it can improve the heat dissipation efficiency of the coil to ensure the heating effect of the electromagnetic heating device. On the other hand, it can also increase the connection stability between the coil and the wire reel to ensure the service life of the electromagnetic heating device, and further ensure the service life of the cooking utensil equipped with the electromagnetic heating device.

[0022] 5. As a preferred embodiment of the present application, a transition arc surface is provided at the edge of the supporting boss to make the edge of the supporting boss smoother, so that the coil can smoothly transition at the edge of the supporting boss to avoid damage to the coil at the edge of the supporting boss when the coil is wound, or the coil is deformed under the action of the wire pressing arm. The edge of the supporting boss causes the coil to be broken, thereby reducing the production cost of the electromagnetic heating device and increasing the service life of the electromagnetic heating device; at the same time, the comfort of the assembler touching the edge of the supporting boss is increased, thereby improving the assembly experience of the assembler; in addition, it can also make it easier to demold the wire drum, improve the production efficiency of the wire drum, and reduce the production cost of the wire drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1A cross-sectional view of the electromagnetic heating device according to one embodiment of the present application;

[0025] Figure 2 for Figure 1 A magnified view of the middle A area;

[0026] Figure 3 for Figure 1 Enlarged view of the B area;

[0027] Figure 4 This is a schematic structural diagram of an electromagnetic heating device according to one embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of the structure of the electromagnetic heating device according to one embodiment of the present application, in which the coil is not shown;

[0029] Figure 6 This is a schematic diagram of the structure of the wire drum in one embodiment of the present application;

[0030] Figure 7 A cross-sectional view of the wire drum according to one embodiment of the present application.

[0031] Reference numerals:

[0032] 1. Wire drum; 11. Support boss; 111. Heat dissipation gap; 112. Support plane; 113. Transition arc surface; 12. Wire pressing rib; 121. Guide arc surface; 13. Bottom winding area; 131. Connecting column; 132. Limiting rib; 14. Side winding area; 15. Limiting channel; 151. Supporting rib; 152. Positioning rib;

[0033] 2. Fixed bracket; 21. Wire pressing arm; 211. Connecting rib; 212. Bottom magnetic part; 213. Side magnetic part; 214. Fixed channel; 215. Elastic arm;

[0034] 3. Coil. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0037] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0040] Reference Figures 1 to 7 An electromagnetic heating device includes a wire drum 1, on which a coil 3 is wound. A support boss 11 and a wire crimping rib 12 are provided on the surface of the wire drum 1. The coil 3 is wound on the inner side of the wire crimping rib 12, and the coil 3 rests on the support boss 11. The support boss 11 is provided corresponding to the wire crimping rib 12, so that the coil 3 forms a tight fit area between the wire crimping rib 12 and the support boss 11, and a heat dissipation gap 111 is formed in the area outside the support boss 11.

[0041] That is to say, the coil 3 is located on the side of the crimping rib 12 facing the wire drum 1, that is, the coil 3 is located between the wire drum 1 and the crimping rib 12, and the tight-fitting area squeezes and fixes the coil 3 to ensure the connection stability of the coil 3 to the wire drum 1.

[0042] When the electromagnetic heating device is working, the heat generated by the coil 3 is dissipated through the heat dissipation gap 111 to improve the heat dissipation efficiency of the coil 3 and reduce the temperature of the coil 3, so that the coil 3 works at a relatively low temperature, thereby ensuring the heating efficiency of the electromagnetic heating device. In addition, when adjusting the distance between the coil 3 and the bottom of the inner pot, the mold used for the production line disk 1 can be adjusted to adjust the height of the supporting boss 11, so that after the coil 3 rests on the supporting boss 11, the distance between the coil 3 and the bottom of the inner pot is the desired distance, thereby reducing the production difficulty of the cooking appliance equipped with the electromagnetic heating device.

[0043] In a preferred embodiment, the wire reel 1 also includes a fixed bracket 2, which is used to fix the magnetic strip. The fixed bracket 2 has a wire pressing arm 21 for pressing the coil 3, and the wire pressing arm 21 is arranged corresponding to the area outside the supporting boss 11. That is, the wire pressing arm 21 and the supporting boss 11 are staggered so that the area where the coil 3 contacts the wire pressing arm 21 has a certain deformation space, so that the coil 3 can deform according to the magnitude of the force applied to itself by the wire pressing arm 21, and then the wire pressing arm 21 is in elastic contact with the coil 3 to reduce the pressure between the wire pressing arm 21 and the coil 3, avoiding the risk of damage to the coil 3. After the coil 3 is deformed, the coil 3 becomes more solid, which increases the stability of the coil 3, thereby increasing the service life of the cooking utensil equipped with the electromagnetic heating device.

[0044] In a preferred embodiment, referring to Figure 5 and Figure 6 The support bosses 11 are arranged on the bottom wall of the wire drum 1 and are spaced apart along the circumference of the wire drum 1 . The wire pressing arms 21 are spaced apart along the circumference of the wire drum 1 and are offset from the support bosses 11 in the circumferential direction of the wire drum 1 .

[0045] Specifically, a plurality of support bosses 11 are provided and are spaced apart along the circumference of the wire reel 1, a plurality of wire pressing arms 21 are also provided and are spaced apart along the circumference of the wire reel 1, and the wire pressing arms 21 and the support bosses 11 are staggered in the circumferential direction of the wire reel 1 to further increase the pressing points on the coil 3, thereby increasing the connection stability between the coil 3 and the wire reel 1, and further improving the service life of the electromagnetic heating device, thereby improving the service life of the cooking utensil equipped with the electromagnetic heating device, and improving the user experience.

[0046] The present application does not specifically limit the connection method between the support boss 11 and the cable drum 1. Preferably, refer to Figure 3 The support boss 11 is integrally formed with the wire drum 1 to facilitate the production of the wire drum 1, reduce the assembly steps of the wire drum 1, improve the production efficiency of the electromagnetic heating device, and facilitate the demoulding of the wire drum 1. In other embodiments, the support boss 11 can also be fixedly connected to the wire drum 1 by glue.

[0047] The present application does not specifically limit the end surface structure of the wire pressing rib 12 facing the coil 3. Preferably, refer to Figures 4 to 7 , the end surface of the wire crimping rib 12 facing the coil 3 is a plane to increase the contact area between the wire crimping rib 12 and the coil 3, thereby increasing the friction between the wire crimping rib 12 and the coil 3, and further increasing the stability of the coil 3. At the same time, the pressure between the wire crimping rib 12 and the coil 3 is reduced to avoid the risk of the wire crimping rib 12 causing damage to the coil 3, thereby reducing the production cost of the electromagnetic heating device and ensuring the service life of the electromagnetic heating device. In other embodiments, the end surface of the wire crimping rib 12 facing the coil 3 can also be a curved surface.

[0048] The present application does not specifically limit the relationship between the width of the supporting boss 11 and the width of the wire pressing rib 12. Preferably, refer to Figure 5 and Figure 6 The width of the support boss 11 is greater than the width of the wire pressing rib 12 to increase the contact area between the support boss 11 and the coil 3, thereby reducing the pressure between the coil 3 and the support boss 11 to increase the service life of the coil 3. At the same time, the friction between the coil 3 and the support boss 11 can be increased, thereby increasing the connection stability between the coil 3 and the support boss 11, and then increasing the stability of the coil 3 to ensure the heating efficiency and service life of the electromagnetic heating device, thereby improving the user experience.

[0049] Preferably, the width D1 of the support boss 11 and the width D2 of the wire crimping rib 12 satisfy: D1-D2≥0.5 mm, so as to further increase the contact area between the support boss 11 and the coil 3 and increase the connection stability between the coil 3 and the support boss 11.

[0050] In other embodiments, the width of the support boss 11 may also be equal to the width of the wire crimping rib 12 , or the width of the support boss 11 may be smaller than the width of the wire crimping rib 12 , so as to reduce the production cost of the coil 3 .

[0051] The present application does not specifically limit the structure of the wire pressing rib 12. Preferably, refer to Figure 6 and Figure 7 The wire crimping rib 12 has a fixed end fixedly connected to the wire drum 1 and a free end opposite to the fixed end. The free end is provided with a guide arc surface 121, so that when the assembler assembles the coil 3, the guide arc surface 121 guides the coil 3, so that the assembler can wind the coil 3 onto the wire drum 1, thereby improving the assembly efficiency of the electromagnetic heating device by the assembler, and then reducing the production cost of the electromagnetic heating device.

[0052] Preferably, pressure relief arc surfaces are provided on the opposite sides of the wire crimping rib 12 to increase the contact area between the opposite sides of the wire crimping rib 12 and the coil 3, thereby reducing the pressure between the coil 3 and the wire crimping rib 12, reducing the risk of damage to the coil 3, increasing the service life of the coil 3 and reducing the assembly cost of the electromagnetic heating device, while also increasing the connection stability between the coil 3 and the wire reel 1.

[0053] In other embodiments, the free end of the crimping rib 12 and the two opposite sides of the crimping rib 12 may also be straight-edge structures.

[0054] The present application does not specifically limit the height of the supporting boss 11. Preferably, refer to Figure 1 and Figure 3 , the height H of the support boss 11 satisfies: 0.2mm≤H≤1mm, which can improve the heat dissipation efficiency of the coil 3 on the one hand to ensure the heating effect of the electromagnetic heating device, and on the other hand, it can also increase the connection stability between the coil 3 and the wire drum 1 to ensure the service life of the electromagnetic heating device, and further ensure the service life of the cooking utensil equipped with the electromagnetic heating device. Of course, in other embodiments, in order to adjust the distance between the coil 3 and the bottom of the inner pot, the height of the support boss 11 can also be designed to be other sizes.

[0055] The present application does not specifically limit the structure of the supporting boss 11. Preferably, refer to Figure 1 and Figure 3 The supporting boss 11 has a supporting plane 112, and the coil 3 rests on the supporting plane 112 to further increase the contact area between the coil 3 and the supporting boss 11, thereby increasing the friction between the coil 3 and the supporting boss 11, increasing the connection stability between the coil 3 and the supporting boss 11, and reducing the pressure between the coil 3 and the supporting boss 11, thereby ensuring the service life of the coil 3 and improving the user experience.

[0056] In a preferred embodiment, referring to Figure 6 A transition arc surface 113 is provided at the edge of the supporting boss 11 to make the edge of the supporting boss 11 smoother, so that the coil 3 can smoothly transition at the edge of the supporting boss 11 to avoid damage to the coil 3 at the edge of the supporting boss 11 when the coil 3 is wound, or the coil 3 is deformed under the action of the wire pressing arm 21, causing the coil 3 to be broken, thereby reducing the production cost of the electromagnetic heating device and increasing the service life of the electromagnetic heating device; at the same time, the comfort of the assembler touching the edge of the supporting boss 11 is increased, thereby improving the assembly experience of the assembler; in addition, it can also make it easier to demold the wire drum 1, improve the production efficiency of the wire drum 1, and reduce the production cost of the wire drum 1.

[0057] In other embodiments, the end surface of the supporting boss 11 facing away from the spool 1 may also be a curved surface, so that the coil 3 rests on the curved surface, so as to further improve the heat dissipation efficiency of the coil 3 .

[0058] In a preferred embodiment, referring to Figure 5 and Figure 6 The bottom wall of the wire drum 1 has a bottom winding area 13, and the side wall of the wire drum 1 has a side winding area 14. A connecting column 131 is arranged between the bottom winding area 13 and the side winding area 14. The connecting column 131 has a contact end facing the side winding area 14, and at least one side of the contact end is provided with a limiting rib 132 extending along the circumference of the side winding area 14.

[0059] Specifically, the fixing bracket 2 is provided with a screw corresponding to the connecting column 131, and the screw thread extends into the connecting column 131 to achieve a fixed connection between the fixing bracket 2 and the wire drum 1. The connecting column 131 is located between the bottom winding area 13 and the side winding area 14, so that the connecting column 131 and the bottom winding area 13 are avoided, so that the assembler can wind the coil 3 in the bottom winding area 13, thereby improving the assembly efficiency of the electromagnetic heating device. When winding the coil 3 in the side winding area 14, the inner circle of the coil 3 in the side winding area 14 contacts the limiting rib 132, so that the limiting rib 132 supports the inner circle of the coil 3 to increase the stability of the inner circle of the coil 3.

[0060] Better, refer to Figure 5 and Figure 6 A plurality of connecting posts 131 are arranged at intervals along the circumference of the wire drum 1, and a plurality of screws on the fixing bracket 2 are arranged corresponding to the connecting posts 131 to increase the connection stability between the fixing bracket 2 and the wire drum 1, thereby ensuring the fixing stability of the coil 3. Limiting ribs 132 are arranged at both ends of the contact portion to further increase the stability of the coil 3.

[0061] Further, see Figure 5 and Figure 6 A connecting rib 211 is provided between two adjacent wire-pressing arms 21, and both ends of the connecting rib 211 are fixedly connected to the two adjacent wire-pressing arms 21 to increase the stability of the wire-pressing arms 21, thereby increasing the structural strength of the fixed bracket 2, and further ensuring the service life of the electromagnetic heating device.

[0062] Furthermore, the screw is arranged on the connecting rib 211 so that the screw and the wire pressing arm 21 are avoided, so as to facilitate the assembly of the screw, and at the same time make the installation position of the screw more eye-catching, so as to improve the assembly efficiency of the screw by the assembler, thereby reducing the production cost of the electromagnetic heating device.

[0063] In a preferred embodiment, referring to Figure 5 and Figure 6There are two groups of crimping ribs 12, and the two groups of crimping ribs 12 are respectively arranged corresponding to the bottom winding area 13 and the side winding area 14. Each group of crimping ribs 12 has multiple crimping ribs 12 to increase the stability of the coil 3 located in the bottom winding area 13 and to increase the stability of the coil 3 located in the side winding area 14.

[0064] Preferably, the support boss 11 is provided corresponding to the crimping ribs 12 located in the bottom winding area 13 and the crimping ribs 12 located in the side winding area 14, so as to further improve the heat dissipation efficiency of the coil 3, thereby ensuring the heating efficiency of the electromagnetic heating device. Of course, in other implementation examples, the support boss 11 can also be provided only corresponding to the crimping ribs 12 located in the bottom winding area 13, so as to reduce the production cost of the electromagnetic heating device.

[0065] In a preferred embodiment, referring to Figure 4 and Figure 5 The wire pressing arm 21 is provided with a bottom magnetic part 212 and a side magnetic part 213, wherein the bottom magnetic part 212 is provided corresponding to the bottom winding area 13, and the side magnetic part 213 is provided corresponding to the side winding area 14, so as to improve the heating efficiency of the electromagnetic heating device, thereby improving the cooking efficiency of the cooking utensil equipped with the electromagnetic heating device and improving the user experience.

[0066] Better, refer to Figure 5 and Figure 6 A fixed channel 214 is provided at the end of the wire pressing arm 21, and a limiting channel 15 is provided at the wire drum 1. The limiting channel 15 is located at the edge of the side winding area 14 away from the bottom winding area 13. The two ends of the side magnetic part 213 extend into the fixed channel 214 and the limiting channel 15 respectively, so that the distance between the side magnetic part 213 and the coil 3 located in the side winding area 14 is consistent, so as to ensure the heating efficiency of the electromagnetic heating device and increase the stability of the side magnetic part 213.

[0067] Further, see Figure 5 The fixed channel 214 is provided with an elastic arm 215, and the elastic arm 215 has an extrusion surface of the channel arm protruding from the fixed channel 214, and the extrusion surface is pressed against the circumferential surface of the side magnetic part 213 to realize the fixed connection between the side magnetic part 213 and the installation channel, so that the assembler can install the side magnetic part 213 to the wire drum 1, thereby improving the assembly efficiency of the assembler for the electromagnetic heating device and reducing the production cost of the electromagnetic heating device.

[0068] The present application does not specifically limit the formation method of the fixed channel 214. Preferably, the end of the wire crimping arm 21 close to the side winding area 14 is hollow, so that the end of the wire crimping arm 21 forms the fixed channel 214, so as to reduce the production cost of the fixed bracket 2, thereby facilitating the reduction of the production cost of the electromagnetic heating device. In other embodiments, a tubular structure is provided at one end of the wire crimping arm 21 close to the side winding area 14, and the fixed channel 214 is formed inside the tubular structure.

[0069] Further, see Figure 6 The wire drum 1 is provided with a supporting rib 151, which extends into the limiting channel 15 and contacts the circumferential surface of the side magnetic part 213 toward the wire drum 1, so that the supporting rib 151 offsets the gap between the side magnetic part 213 and the wire drum 1, thereby increasing the stability of the side magnetic part 213, and further ensuring the stability of the heating efficiency of the electromagnetic heating device.

[0070] Further, see Figure 6 The wire drum 1 is provided with a positioning rib 152 located in the limiting channel 15, and the positioning rib 152 abuts against the end of the side magnetic part 213, so that the positioning rib 152 supports and limits the side magnetic part 213, so as to avoid the side magnetic part 213 from escaping from the fixing channel 214, thereby increasing the connection stability between the side magnetic part 213 and the fixing bracket 2, ensuring the product quality of the electromagnetic heating device, and further ensuring the service life of the cooking utensil equipped with the electromagnetic heating device.

[0071] The present application does not specifically limit the formation method of the limiting channel 15. Preferably, the wire drum 1 is provided with a U-shaped rib, and the limiting channel 15 is formed between the U-shaped rib and the wire drum 1 to increase the stability of the limiting channel 15. In other implementation examples, the limiting channel 15 can also be provided with a ridge on the wire drum 1, and the limiting channel 15 is formed inside the ridge.

[0072] Of course, in other embodiments, the side magnetic member 213 may be omitted, and only the bottom magnetic member 212 acts on the coil 3 .

[0073] The present application also discloses a cooking utensil, which comprises a pot body and the above-mentioned electromagnetic heating device, wherein the electromagnetic heating device is arranged inside the pot body.

[0074] By adopting the above-mentioned electromagnetic heating device, the heat dissipation efficiency of the coil 3 is improved, the cooking efficiency of the cooking utensil is guaranteed, the user experience is improved, the service life of the cooking utensil is increased, and the production difficulty of the cooking utensil is reduced.

[0075] The present application does not specifically limit the type of cooking appliance, which may be an induction cooker, an electric rice cooker, a pressure cooker, or other kitchen appliances that utilize electromagnetic heating.

[0076] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0077] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0078] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An electromagnetic heating device, comprising a wire drum, on which a coil is wound, characterized in that: The surface of the wire drum is provided with a supporting boss and a wire pressing rib, the coil is wound on the inner side of the wire pressing rib, and the coil rests on the supporting boss, the supporting boss is arranged corresponding to the wire pressing rib, so that the coil forms a tight fit area between the wire pressing rib and the supporting boss, and forms a heat dissipation gap in the area outside the supporting boss.

2. An electromagnetic heating device according to claim 1, characterized in that: The wire drum also includes a fixed bracket, which is used to fix the magnetic strip. The fixed bracket has a wire pressing arm for pressing the coil, and the wire pressing arm is arranged corresponding to the area outside the supporting boss.

3. An electromagnetic heating device according to claim 2, characterized in that: The supporting bosses are arranged on the bottom wall of the wire drum and are spaced apart along the circumference of the wire drum. The wire pressing arms are spaced apart along the circumference of the wire drum and are staggered with the supporting bosses in the circumference of the wire drum.

4. The electromagnetic heating device according to claim 1, characterized in that: The width of the supporting boss is greater than the width of the pressing rib.

5. The electromagnetic heating device according to claim 1, characterized in that: The wire pressing rib comprises a fixed end fixedly connected to the wire drum and a free end opposite to the fixed end, and the free end is provided with a guiding arc surface.

6. The electromagnetic heating device according to claim 1, characterized in that: The height H of the supporting boss satisfies: 0.2mm≤H≤1mm.

7. The electromagnetic heating device according to claim 1, characterized in that: The supporting boss has a supporting plane, and the coil rests on the supporting plane.

8. An electromagnetic heating device according to claim 7, characterized in that: A transition arc surface is arranged at the edge of the supporting boss.

9. The electromagnetic heating device according to claim 1, characterized in that: The bottom wall of the wire drum has a bottom winding area, and the side wall of the wire drum has a side winding area. A connecting column is arranged between the bottom winding area and the side winding area, and the connecting column has a contact end facing the side winding area. At least one side of the contact end is provided with a limiting rib extending along the circumference of the side winding area.

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

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