Electromagnetic heating device and electromagnetic cooking utensil

Abstract

The utility model provides an electromagnetic heating device and an electromagnetic cooking utensil. The electromagnetic heating device is used for electromagnetically heating a cooking container of the electromagnetic cooking utensil. An electromagnetic heating device includes a coil panel assembly, a support member, and a magnetic field adjustment member. The supporting component is located on the side, opposite to the cooking container, of the coil panel assembly and comprises at least one abutting part, and the at least one abutting part extends in the preset direction. The magnetic field adjusting component is configured to be a magnet gathering body, is fixed to the side face, facing the coil panel assembly, of the supporting component and comprises a plurality of first local functional bodies, and the first local functional bodies are arranged at intervals in the preset direction. The preset direction is the circumferential direction or the radial direction of the coil panel assembly, and the multiple first local functional bodies are all fixed to the same abutting part. According to the electromagnetic heating device provided by the utility model, the plurality of first local functional bodies can be fixed by the single abutting part, so that the magnetic field adjusting component is more convenient to install and fix relative to the coil panel assembly.

Description

Technical Field

[0001] This utility model generally relates to the technical field of kitchen household appliances, and more specifically to an electromagnetic heating device and an electromagnetic cooking appliance. Background Technology

[0002] Currently, electromagnetic heating cooking appliances such as IH rice cookers and IH electric pressure cookers all generate a magnetic field through a coil wound around a wire, which induces eddy currents in the inner pot to heat the food inside. Existing cooking appliances use a magnetic component on the outside of the inner pot. During the electromagnetic heating process, a temperature difference is generated inside the inner pot, causing thermal convection between the liquid and food, resulting in more even heating and ensuring uniform and consistent cooking results. However, in existing technologies, if the magnetic component is integrated with the inner pot, the manufacturing difficulty of the inner pot increases, hindering production reduction. Conversely, if the magnetic component is separate from the inner pot, installation is inconvenient, and its position relative to the coil is prone to change, affecting the cooking effect.

[0003] Therefore, there is a need to provide an electromagnetic heating device and an electromagnetic cooking appliance to at least partially solve the above problems. Utility Model Content

[0004] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the first aspect of this utility model provides an electromagnetic heating device for electromagnetically heating the cooking container of an electromagnetic cooking appliance, the electromagnetic heating device comprising:

[0006] Coil disk assembly;

[0007] A support member is located on the side of the coil assembly facing away from the cooking container and includes at least one abutment portion that extends in a predetermined direction.

[0008] A magnetic field adjustment component is used to locally change the magnetic field distribution generated by the energized coil disk assembly. The magnetic field adjustment component is constructed as a magnetizing body. The magnetic field adjustment component is fixed to the side of the support component facing the coil disk assembly and includes a plurality of first local functional bodies. The plurality of first local functional bodies are arranged at intervals along the preset direction.

[0009] The preset direction is either circumferential or radial to the coil assembly, and the plurality of first partial functional bodies are all fixed to the same abutment.

[0010] According to this solution, the magnetic field adjustment component can locally interfere with the magnetic field on the side of the coil assembly facing away from the electromagnetic cooking appliance; causing the magnetic field lines radiating towards the cooking container to be unevenly distributed; when electromagnetically heating the cooking container, it changes the heat distribution generated by the cooking container, forming locally uneven heating, creating areas of different temperatures, and generating local temperature differences. This promotes faster and more intense heat convection between the liquid and food in the cooking container, resulting in more thorough boiling and churning of the liquid and food, more even heating of the food, and better taste of the cooked food. The position of the magnetic field adjustment component can be defined by the support component and the coil assembly, preventing the magnetic field adjustment component from falling off or shifting its position after long-term use. A single abutment can fix multiple first local functional units, making the installation and fixation of the magnetic field adjustment component relative to the coil assembly more convenient.

[0011] Optionally, the support member has a positioning hole in the middle, the coil assembly includes a coil, the coil has a hollow positioning post in the middle, and the positioning post passes through the positioning hole to position the support member.

[0012] According to this scheme, the positions of the coil disk assembly and the support component correspond to each other, ensuring the installation position accuracy of the magnetic field adjustment component relative to the coil disk.

[0013] Optionally, the support member is provided with a positioning cylinder extending axially from the edge of the positioning hole. The positioning cylinder is sleeved on the positioning post and the two are fixedly connected by a limiting structure to limit the support member from leaving the coil disk and rotating relative to the coil disk.

[0014] According to this solution, the position of the support component relative to the coil disk is fixed to avoid changes in the position of the magnetic field adjustment component during use, thus ensuring the local interference effect of the magnetic field adjustment component on the magnetic field generated by the coil disk assembly.

[0015] Optionally, the limiting structure includes a first limiting plane and a second limiting plane, wherein the first limiting plane is formed on the outer peripheral surface of the positioning post and the second limiting plane is formed on the inner peripheral surface of the positioning cylinder.

[0016] According to this solution, the limiting structure can prevent the supporting components from rotating relative to the coil disk.

[0017] Optionally, the limiting structure includes a limiting protrusion and a limiting groove extending along the circumferential direction. The limiting protrusion is disposed on one of the outer circumferential surface of the positioning post and the inner circumferential surface of the positioning cylinder, and the limiting groove is disposed on the other of the outer circumferential surface of the positioning post and the inner circumferential surface of the positioning cylinder. The limiting protrusion is engaged in the limiting groove.

[0018] According to this solution, the limiting structure can prevent the supporting components from falling off relative to the coil disc.

[0019] Optionally, the magnetic field adjustment component further includes a second partial functional body located in the middle and having a central hole, wherein the plurality of first partial functional bodies are all connected to the second partial functional body, and the positioning post passes through the central hole.

[0020] According to this scheme, multiple first local functional units form a whole to avoid them being scattered; and the magnetic field adjustment component will not affect the installation and connection between the support component and the coil disk.

[0021] Optionally, the electromagnetic heating device further includes a clamping member connected to the supporting member, and the magnetic field adjusting member is clamped between the clamping member and the supporting member.

[0022] According to this solution, the fixing effect of the magnetic field adjustment component relative to the coil disk assembly is further improved, and the position of the magnetic field adjustment component relative to the coil disk assembly is prevented from changing.

[0023] Optionally, the clamping member abuts against the magnetic field adjusting member at least in the portion corresponding to the abutment portion.

[0024] According to this scheme, the clamping component and the abutment part cooperate to form a clamping effect on the magnetic field adjustment component.

[0025] Optionally, both the clamping member and the supporting member are constructed with the same structure in the portion corresponding to the magnetic field adjustment member.

[0026] According to this solution, the clamping component can better correspond to the position of the supporting component, resulting in a better clamping effect on the magnetic field adjustment component.

[0027] Optionally, the clamping member, the magnetic field adjusting member, and the supporting member are connected by fasteners.

[0028] According to this solution, the clamping component, the magnetic field adjustment component, and the support component are easy to disassemble and maintain, and can form a whole, reducing the probability of their positions changing relative to the coil assembly.

[0029] Optionally, the preset direction is the circumferential direction of the coil assembly, and the abutment portion is constructed as a ring extending along the circumferential direction; or

[0030] The preset direction is the radial direction of the coil assembly, and the abutment portion is constructed as a strip extending along the radial direction, with the abutment portions of the strip arranged at intervals along the circumferential direction.

[0031] According to this solution, a suitable abutment is designed based on the shape of the first partial functional body to ensure the support and fixation effect for the first partial functional body.

[0032] Optionally, the support member further includes a plurality of limiting parts, which are connected to the side of the abutment near the magnetic field adjustment member. The plurality of limiting parts are arranged at intervals along the preset direction, and each of the first partial functional bodies is sandwiched between adjacent limiting parts.

[0033] According to this solution, the position of the magnetic field adjustment component relative to the support component can be further defined, ensuring that the position of the first local functional body will not change, so that the magnetic field line distribution of the entire coil area remains unchanged, thus ensuring the uneven heating effect on the cooking container.

[0034] Optionally, the magnetic field adjustment component further includes a second partial functional body located in the middle, and the plurality of first partial functional bodies are all connected to the second partial functional body, and at least two of the plurality of first partial functional bodies are connected to the support component by fasteners.

[0035] According to this scheme, the second local functional body and multiple first local functional bodies form a whole, which can prevent individual first local functional bodies from falling apart and reduce the difficulty of installing and fixing the magnetic field adjustment component; the fastener further limits the position of the first local functional body relative to the support component, and prevents the first local functional body from shifting position relative to the support component.

[0036] Optionally, the first partial functional body is an independent component, and each of the plurality of first partial functional bodies is connected to the support component by at least two spaced fasteners.

[0037] According to this scheme, the first local functional body and the supporting member are easy to connect, and the first local functional body will not rotate relative to the supporting member after connection.

[0038] Optionally, the distance s between two adjacent first local functional bodies is in the range of 5mm ≤ s ≤ 85mm.

[0039] According to this solution, the uneven heating of the cooking container is more effective, resulting in better heating of the food. The heat exchange formed inside the cooking appliance allows the liquid and food in the cooking container to boil and tumble more fully, and the food is heated more evenly, avoiding undercooking.

[0040] Optionally, the width of each of the first partial functional bodies in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward of the electromagnetic heating device.

[0041] According to this solution, multiple local functional bodies, including fan-shaped and similar patterns, can be formed on the coil assembly. Compared to other shapes such as rings, circles, and polygons, the local functional bodies with gradually widening patterns have the structural characteristic of being narrower closer to the bottom center of the cooking container and wider further away from the bottom center. This allows the local functional bodies to cover a larger area of ​​the cooking container, at least at the bottom, and provides a larger adjustment area for the heat distribution within the cooking container. Consequently, the coverage area of ​​the local temperature difference zone is larger, achieving a wide-range, uneven heating and boiling effect. Furthermore, when the local functional bodies form the inner or outer surface of the pot, the appearance of the product can be shaped based on the gradually widening pattern, resulting in a simpler, more aesthetically pleasing overall appearance and a better visual effect.

[0042] Optionally, the coil assembly includes a coil, and the magnetic field adjustment member has a total coverage area corresponding to the coil, the total coverage area being a percentage of the area of ​​the coil winding region ranging from 40% to 80%.

[0043] According to this solution, both the overall heating effect and the local convection effect of electromagnetic cooking appliances can be taken into account, thus ensuring the cooking quality of food.

[0044] The second aspect of this utility model provides an electromagnetic cooking appliance, which includes a cooking container and an electromagnetic heating device according to the first aspect of this utility model. The electromagnetic heating device is used to heat the cooking container, and the cooking container includes a magnetic conductive layer.

[0045] According to this solution, the cooking container has magnetic sensing capability, which can sense heat generation when the coil is energized, thereby improving the heating and cooking effect on the food. Attached Figure Description

[0046] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings,

[0047] Figure 1 This is an exploded view of an electromagnetic cooking appliance according to a preferred embodiment of the present invention.

[0048] Figure 2 for Figure 1 A top view of the magnetic field adjustment component in the electromagnetic cooking appliance shown.

[0049] Figure 3 for Figure 2 A sectional view, wherein the tangent of the section is perpendicular to the axis of the magnetic field adjustment component;

[0050] Figure 4 for Figure 1 A bottom view of the connection between the support component and the magnetic field adjustment component in the electromagnetic cooking appliance shown;

[0051] Figure 5 for Figure 1 The diagram shows a cross-sectional view of the installation and connection of the support member, magnetic field adjustment member, and clamping member in an electromagnetic cooking appliance, wherein the tangent of the section is perpendicular to the axis of the magnetic field adjustment member.

[0052] Figure 6 for Figure 1 A three-dimensional schematic diagram of the coil plate and coil connection in the electromagnetic cooking appliance shown;

[0053] Figure 7 for Figure 1 A three-dimensional schematic diagram of the clamping component in the electromagnetic cooking appliance shown;

[0054] Figure 8 for Figure 1 The cross-sectional view of the electromagnetic cooking appliance shown is provided, wherein the tangent of the section is parallel to the center line extending in the front-back direction of the electromagnetic cooking appliance.

[0055] Figure 9 for Figure 8 An enlarged view of part A in the image;

[0056] Figure 10 for Figure 1 A bottom view of the electromagnetic cooking appliance shown, in which the magnetic field adjustment component is fixed to the coil assembly by the support component;

[0057] Figure 11 for Figure 10 A top view of the coil assembly shown;

[0058] Figure 12 This is a bottom view schematic diagram of the installation and connection of the magnetic field adjustment component and the support component according to another embodiment of the present invention.

[0059] Figure 13 This is a schematic diagram showing the distribution of the magnetic field adjustment component relative to the coil according to another embodiment of the present invention;

[0060] Figure 14 According to Figure 13 A bottom view of the installation and connection between the magnetic field adjustment component and the support component;

[0061] Figure 15 According to Figure 13A top view showing the installation and connection of the magnetic field adjustment component and the support component;

[0062] Figure 16 This is a schematic diagram showing the distribution of the magnetic field adjustment component relative to the coil according to another embodiment of the present invention; and

[0063] Figure 17 This is a schematic diagram illustrating the adjustment of the temperature distribution of a cooking container using a magnetic field adjustment component according to a preferred embodiment of the present invention.

[0064] Explanation of reference numerals in the attached figures:

[0065] 100 Electromagnetic Cooking Appliances

[0066] 110 Electromagnetic heating device

[0067] 111 Coil

[0068] 112 coil

[0069] 113 Coil Disc Assembly

[0070] 114 Positioning Posts

[0071] 115 First limiting plane

[0072] 116 Limiting protrusion

[0073] 120 / 220 / 320 / 420 Magnetic field adjustment components

[0074] 121 / 221 / 321 / 421 First Local Functional Body

[0075] 122 Second Local Functional Entity

[0076] 123 Center Hole

[0077] 130 / 230 / 330 Supporting components

[0078] 131 / 231 / 331 Reception Department

[0079] 132 / 232 / 332 positioning holes

[0080] 133 Positioning Cylinder

[0081] 134 Second limiting plane

[0082] 135 Limiting Groove

[0083] 140 clamping component

[0084] 150 cooking containers

[0085] 151 Magnetic layer

[0086] 152 Thermal Conductive Layer

[0087] 333 Limiting Part

[0088] S1 bypass area

[0089] S2 Total Coverage Area

[0090] A1 Covered Area

[0091] A2 Coverage Area Detailed Implementation

[0092] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0093] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art.

[0094] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the invention. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0095] The ordinal numbers such as "first" and "second" used in this utility model are merely identifiers and do not have any other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar expressions used in this utility model are for illustrative purposes only and are not intended to be limiting.

[0096] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, which show representative embodiments of the present invention and are not intended to limit the present invention.

[0097] This invention provides an electromagnetic cooking appliance that can cook food using electromagnetic heating technology.

[0098] The electromagnetic cooking appliance 100 can be, for example, an IH rice cooker, an induction cooker equipped with a cooking container 150, an IH pressure cooker, or other cooking appliances, and in addition to the function of cooking rice, the cooking appliance can also have various functions such as cooking porridge.

[0099] The electromagnetic cooking appliance 100 includes a cooking container 150 and an electromagnetic heating device 110. The electromagnetic heating device 110 includes a coil assembly 113, which includes a coil 112 and a coil disc 111 for winding the coil 112. The cooking container 150 includes a magnetically conductive layer and has magnetic induction capability, enabling it to generate heat induction when the coil 112 is energized.

[0100] For IH rice cookers, the cooking appliance includes a pot body and a lid. The cooking container 150 is the inner pot, and the pot body has a cylindrical inner pot storage section. The inner pot can be fixedly installed in the inner pot storage section, or it can be freely placed into or removed from the inner pot storage section for easy cleaning. The inner pot is usually made of metal and has a circular opening on its upper surface for holding materials to be heated, such as rice or soup. The pot body includes an electromagnetic heating device 110 for heating the inner pot. In this cooking appliance, the bottom of the inner pot has a bottom coil 111, which is integrally constructed as a recessed structure, and the bottom of the inner pot is accommodated within this recessed structure. Some cooking appliances have annular side coils 111 on the side of the inner pot.

[0101] The lid has a shape that substantially corresponds to the pot body. The lid is cladably mounted on the pot body; specifically, it is pivotally connected to the pot body via a pivot axis and can freely pivot between a closed and open position relative to the pot body about the pivot axis, facilitating the closing and opening of the pot body. When the lid is closed on the pot body, it covers the inner pot, forming a cooking space between them. The lid typically also has a sealing ring, which can be made of, for example, rubber, and is positioned between the lid and the inner pot to seal the cooking space when the lid is closed.

[0102] For induction cookers, the cooking container 150 can be a pot, a cup, or the like. The cooking container 150 is independent of the induction cooker, and can be placed on the upper surface of the induction cooker during use. In this cooking appliance, the coil 111 is constructed as a flat structure.

[0103] To improve heat convection within the cooking container 150 during cooking, this invention provides an electromagnetic heating device 110 for electromagnetically heating the cooking container 150 of an electromagnetic cooking appliance. In addition to the aforementioned coil assembly 113, the electromagnetic heating device 110 also includes a support member 130 and a magnetic field adjustment member 120. The support member 130 is located on the side of the coil assembly 113 facing away from the cooking container 150 and includes at least one abutment portion 131 extending along a predetermined direction. The magnetic field adjustment member 120 is used to locally alter the magnetic field distribution generated by energizing the coil assembly 113 (specifically, the coil 112). It should be noted that the magnetic field adjustment member 120 is constructed as a magnetizing body. The magnetic field adjustment member 120 is fixed to the side of the support member 130 facing the coil assembly 113 and includes multiple first partial functional bodies 121, which are spaced apart along a predetermined direction. The aforementioned preset direction is either circumferential or radial to the coil assembly 113, and multiple first partial functional bodies are fixed to the same abutment 131.

[0104] According to the heating device 110 of this solution, the magnetic field adjustment component 120 can locally interfere with the magnetic field on the side of the coil assembly 113 facing away from the electromagnetic cooking appliance 100; causing the magnetic field lines radiating towards the cooking container 150 to be unevenly distributed; when electromagnetically heating the cooking container 150, it changes the heat distribution generated by the cooking container 150, forming locally uneven heating, creating areas with different temperatures, generating local temperature differences, causing the heat convection of the liquid and food in the cooking container 150 to become faster and more intense, making the liquid and food in the cooking container 150 boil and tumble more fully, the food is heated more evenly, and the cooked food tastes better. The position of the magnetic field adjustment component 120 can be defined by the support component 130 and the coil assembly 113, preventing the magnetic field adjustment component 120 from falling off or changing position after long-term use. A single abutment part 131 can fix multiple first local functional bodies 121, making the installation and fixation of the magnetic field adjustment component 120 relative to the coil assembly 113 more convenient. The magnetic field adjustment component 120 can be made of ferrite, ferrosilicon alloy, iron-nickel alloy, etc.

[0105] Please see Figures 1 to 4The preset direction is the circumferential direction of the coil assembly 113, and the abutment portion 131 is constructed as a ring extending circumferentially. The magnetic field adjustment member 120 includes a plurality of first partial functional bodies 121, which are arranged in a circumferential array along the electromagnetic heating device 110. Furthermore, the width of each first partial functional body 121 in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward of the electromagnetic heating device 110. The magnetic field adjustment member 120 also includes a second partial functional body 122 located in the center and having a central hole 123, to which the plurality of first partial functional bodies 121 are connected. At least two of the plurality of first partial functional bodies 121 are connected to the support member 130 by fasteners to prevent the magnetic field adjustment member 120 from rotating relative to the support member 130 after being connected to it. For example... Figure 4 In this structure, each of the first partial functional units 121 is connected to the support member 130 by fasteners. The support member 130 has a positioning hole 132 in the middle, and the coil disk 111 has a hollow positioning post 114 in the middle. The positioning post 114 passes through the central hole 123 and is inserted into the positioning hole 132 to position the support member 130.

[0106] For details, please refer to Figures 4 to 7 The support member 130 is provided with a positioning cylinder 133 extending axially from the edge of the positioning hole 132. The positioning cylinder 133 is sleeved on the positioning post 114, and the two are fixedly connected by a limiting structure to limit the support member 130 from leaving the coil disk 111 and from rotating relative to the coil disk 111. Further, the limiting structure includes a first limiting plane 115 and a second limiting plane 134. The first limiting plane 115 is formed on the outer peripheral surface of the positioning post 114, and the second limiting plane 134 is formed on the inner peripheral surface of the positioning cylinder 133. After the first limiting plane 115 and the second limiting plane 134 abut against each other, the support member 130 will not rotate relative to the coil disk 111. The limiting structure includes a limiting protrusion 116 and a limiting groove 135 extending circumferentially. A limiting protrusion 116 is provided on one of the outer peripheral surface of the positioning post 114 and the inner peripheral surface of the positioning cylinder 133, and a limiting groove 135 is provided on the other of the outer peripheral surface of the positioning post 114 and the inner peripheral surface of the positioning cylinder 133. The limiting protrusion 116 is engaged within the limiting groove 135. For example... Figures 6 to 9 In this embodiment, the limiting protrusion 116 is provided on the outer peripheral surface of the positioning post 114, and the limiting groove 135 is provided on the inner peripheral surface of the positioning cylinder 133. In an embodiment not shown, the limiting protrusion 116 may also be provided on the inner peripheral surface of the positioning cylinder 133, and correspondingly, the limiting groove 135 is provided on the outer peripheral surface of the positioning post 114.

[0107] Return to reference Figure 1The electromagnetic heating device 110 also includes a clamping member 140 connected to the support member 130, and a magnetic field adjusting member 120 is clamped between the clamping member 140 and the support member 130. It should be noted that the clamping member 140 abuts against the magnetic field adjusting member 120 at least in the portion corresponding to the abutment portion 131. Furthermore, both the clamping member 140 and the support member 130 have the same structure in the portions corresponding to the magnetic field adjusting member 120. Please refer to... Figure 1 and Figure 5 The clamping component 140, the magnetic field adjustment component 120, and the support component 130 are connected by fasteners. Figure 10 and Figure 11 The support member 130 and the magnetic field adjustment member 120 are shown to be connected to the coil disk 111 by fasteners.

[0108] Please see Figure 12 , Figure 12 A magnetic field adjustment member 220 is shown. The magnetic field adjustment member 220 has only a plurality of first partial functional bodies 221 arranged in a circumferential array along the electromagnetic heating device 110. A support member 230 includes an annular abutment portion 231, and a positioning hole 232 is provided in the center of the support member 230. Each of the first partial functional bodies 221 is an independent component, and each of the plurality of first partial functional bodies 221 is connected to the support member 230 by at least two spaced fasteners. For example… Figure 12 In this configuration, each of the first partial functional bodies 221 is connected to the support member 230 by two spaced fasteners, which prevents the first partial functional body 221 from rotating relative to the support member 230 after it is connected to the support member 230.

[0109] Please see Figure 13 The magnetic field adjustment component 320 is constructed in a ring shape, and multiple first local functional units 321 are spaced apart and nested together along the radial direction of the electromagnetic heating device 110. That is, the aforementioned preset direction is the radial direction of the coil assembly 113. In this state, please refer to... Figure 14 and Figure 15This diagram illustrates a clamping member 330 suitable for a magnetic field adjustment member 320. Specifically, the clamping member 330 includes an abutment portion 331, and a positioning hole 332 is located in the center of the clamping member 330. The abutment portion 331 is constructed as a radially extending strip, and the strip-shaped abutment portions 331 are arranged circumferentially at intervals. Furthermore, each abutment portion 331 has a plurality of limiting portions 333 on its side facing away from the cooking container 150. The plurality of limiting portions 333 are connected to the side of the abutment portion 331 near the magnetic field adjustment member 320, and the plurality of limiting portions 333 are arranged at intervals along the radial direction (preset direction) of the electromagnetic heating device. The annular magnetic field adjustment member 320 is sandwiched between adjacent limiting portions 333 along the radial direction of the electromagnetic heating device. In other words, each annular first partial functional body 321 is sandwiched between adjacent limiting portions 333.

[0110] Please see Figure 16 The magnetic field adjustment member 420 is constructed in a sheet shape and arranged in a circumferential array as described above. It can be understood that, in this state, the clamping member can be constructed as strips spaced radially along the electromagnetic heating device 110, or as a ring extending circumferentially along the electromagnetic heating device 110. Multiple first partial functional bodies 421 can be fixed to the abutment portion of the ring extending circumferentially along the electromagnetic heating device 110.

[0111] Figures 13 to 16 The diagram shows the distribution of the magnetic field adjustment component (or the projection of the magnetic field adjustment component onto coil 112) relative to coil 112. The blank areas represent uncovered areas A1, while the shaded areas represent covered areas A2.

[0112] Figure 17 The cooking container 150 shown includes a magnetic layer 151 and a heat-conducting layer 152, with the magnetic layer 151 closer to the coil assembly 113 than the heat-conducting layer 152. The magnetic field adjustment member 120 (first local functional body 121) is a magnetizing body. When the cooking container 150 is heated, a high-temperature point T1 is generated at the location of the first local functional body 121 (or the covered area A2 of the coil 112). After heat conduction, a high-temperature point T2 and a low-temperature point T3 are generated on the inner surface of the cooking container 150, where the high-temperature point T2 corresponds to the location of the high-temperature point T1 in the thickness direction, and the low-temperature point T3 corresponds to the uncovered area A1 in the thickness direction. After a temperature difference is generated on the inner surface of the cooking container 150, heat flows from the high-temperature area to the low-temperature area (i.e., from T2 to T3), promoting tumbling and convection of food within the cooking container 150, resulting in uniform cooking.

[0113] The spacing s is the distance between two adjacent first local functional bodies 121. A test was conducted using an example cooking container 150 of this invention, and the relationship between temperature difference and spacing s was obtained, as shown in the table below.

[0114]

[0115] Therefore, as the spacing s increases, the temperature difference between the high-temperature point T2 and the low-temperature point T3 also increases. If the spacing is too small, the temperature difference is too small, the rice's tumbling force is too weak, and the moisture content of the cooked rice is uneven. If the spacing is too large, the temperature difference is too large, the temperature in the low-temperature zone is too low, and the rice is prone to being undercooked in the low-temperature zone. At the same time, because the area of ​​the temperature difference zone decreases with the larger spacing, the tumbling will also be uneven. Therefore, the spacing s is set to 5mm to 85mm, for example, 5mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, etc.; preferably 10mm to 60mm.

[0116] Return to reference Figure 1 The coil 112 has a winding area S1 corresponding to the coil disk 111, and the magnetic field adjustment member 120 has a total coverage area S2 corresponding to the coil 112.

[0117] By appropriately setting the area ratio of the magnetic field adjustment component 120, the overall heat of the cooking container 150 can meet the cooking requirements while ensuring both overall heating efficiency and localized convection efficiency. When the magnetic field adjustment component 120 is constructed as a magnetizing body, the ratio of the total coverage area S2 of the magnetic field adjustment component 120 corresponding to the coil 112 to the aforementioned winding area S1 is 40% to 80%. For example, the area ratio can be 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, etc., preferably 55%. If the area ratio of the magnetizing body is too large, the temperature difference in the gap area will be too small, reducing the convection effect; if the area ratio is too small, the thermal efficiency will be insufficient.

[0118] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0119] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. An electromagnetic heating device for electromagnetically heating the cooking container of an electromagnetic cooking appliance, characterized in that, The electromagnetic heating device includes: Coil disk assembly; A support member is located on the side of the coil assembly facing away from the cooking container and includes at least one abutment portion that extends in a predetermined direction. A magnetic field adjustment component is used to locally change the magnetic field distribution generated by the energized coil disk assembly. The magnetic field adjustment component is constructed as a magnetizing body. The magnetic field adjustment component is fixed to the side of the support component facing the coil disk assembly and includes a plurality of first local functional bodies. The plurality of first local functional bodies are arranged at intervals along the preset direction. The preset direction is either circumferential or radial to the coil assembly, and the plurality of first partial functional bodies are all fixed to the same abutment.

2. The electromagnetic heating device according to claim 1, characterized in that, The support member has a positioning hole in the middle, and the coil assembly includes a coil. The coil has a hollow positioning post in the middle, and the positioning post passes through the positioning hole to position the support member.

3. The electromagnetic heating device according to claim 2, characterized in that, The support member is provided with a positioning cylinder extending axially from the edge of the positioning hole. The positioning cylinder is sleeved on the positioning post and the two are fixedly connected by a limiting structure to limit the support member from leaving the coil disk and rotating relative to the coil disk.

4. The electromagnetic heating device according to claim 3, characterized in that, The limiting structure includes a first limiting plane and a second limiting plane. The first limiting plane is formed on the outer peripheral surface of the positioning post, and the second limiting plane is formed on the inner peripheral surface of the positioning cylinder.

5. The electromagnetic heating device according to claim 3, characterized in that, The limiting structure includes a limiting protrusion and a limiting groove extending along the circumferential direction. The limiting protrusion is disposed on one of the outer circumferential surface of the positioning post and the inner circumferential surface of the positioning cylinder, and the limiting groove is disposed on the other of the outer circumferential surface of the positioning post and the inner circumferential surface of the positioning cylinder. The limiting protrusion is engaged in the limiting groove.

6. The electromagnetic heating device according to claim 2, characterized in that, The magnetic field adjustment component also includes a second partial functional body located in the middle and having a central hole. The plurality of first partial functional bodies are all connected to the second partial functional body, and the positioning post passes through the central hole.

7. The electromagnetic heating device according to claim 1, characterized in that, The electromagnetic heating device further includes a clamping member connected to the supporting member, and the magnetic field adjusting member is clamped between the clamping member and the supporting member.

8. The electromagnetic heating device according to claim 7, characterized in that, The clamping member abuts against the magnetic field adjusting member at least in the portion corresponding to the abutment portion; and / or Both the clamping member and the supporting member are constructed with the same structure in the portions corresponding to the magnetic field adjusting member; and / or The clamping component, the magnetic field adjusting component, and the supporting component are connected by fasteners.

9. The electromagnetic heating device according to claim 1, characterized in that, The preset direction is the circumferential direction of the coil assembly, and the abutment portion is constructed as a ring extending along the circumferential direction; or The preset direction is the radial direction of the coil assembly, and the abutment portion is constructed as a strip extending along the radial direction, with the abutment portions of the strip arranged at intervals along the circumferential direction.

10. The electromagnetic heating device according to claim 1, characterized in that, The supporting member further includes multiple limiting parts, which are connected to the side of the abutment near the magnetic field adjustment member. The multiple limiting parts are arranged at intervals along the preset direction, and each of the first partial functional bodies is sandwiched between adjacent limiting parts.

11. The electromagnetic heating device according to claim 1, characterized in that, The magnetic field adjustment component further includes a second partial functional body located in the middle, and all of the plurality of first partial functional bodies are connected to the second partial functional body. At least two of the plurality of first partial functional bodies are connected to the support component by fasteners; or The first partial functional body is an independent component, and each of the plurality of first partial functional bodies is connected to the support component by at least two spaced fasteners.

12. The electromagnetic heating device according to any one of claims 1 to 11, characterized in that, The spacing s between two adjacent first local functional units is in the range of: 5mm ≤ s ≤ 85mm; and / or The width of each of the first partial functional units in the circumferential direction gradually increases from the radial direction outward and / or the height direction upward of the electromagnetic heating device.

13. The electromagnetic heating device according to any one of claims 1 to 11, characterized in that, The coil assembly includes a coil, and the magnetic field adjustment member has a total coverage area corresponding to the coil, the total coverage area being a percentage of the area of ​​the coil winding region ranging from 40% to 80%.

14. An electromagnetic cooking appliance, characterized in that, The electromagnetic cooking appliance includes a cooking container and an electromagnetic heating device according to any one of claims 1 to 13, the electromagnetic heating device being used to heat the cooking container, the cooking container including a magnetically conductive layer.

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