Cooking apparatus

Abstract

The utility model discloses a kind of cooking equipment, cooking equipment includes: cooking main body, including shell, inner support and excitation coil assembly, the inner support is located at the inner side of the shell, the inner support is defined in and places the accommodating cavity of cooking pot, the excitation coil assembly is located between the inner support and the shell to be used for heating the cooking pot, the shell and the excitation coil assembly between definition separate space, all substances in the separate space are separate medium, the relative magnetic permeability of the separate medium is μ r ,0.9≤μ r ≤2;Cover body assembly, located in the cooking main body, for opening and closing the placement port of the accommodating cavity.The utility model proposes a kind of cooking equipment, only separate medium in the separate space between excitation coil assembly and shell, reduce the interference of other substances to the magnetic field generated by excitation coil assembly, ensure the uniformity of the magnetic field in accommodating cavity, improve cooking effect.

Description

Technical Field

[0001] This utility model relates to the field of electrical appliances, and in particular to a cooking device. Background Technology

[0002] Electromagnetic heating is almost universally used in home appliances. In related technologies, electromagnetic rice cookers consist of a coil and a magnetic strip on the back of the coil. The coil provides the magnetic field, and the magnetic strip concentrates the magnetic field upwards, guiding it to the cooking pot. The magnetic field acts on the cooking pot, generating a heating current. This heating current then acts on the cooking pot, producing heat. Because electromagnetic heating uses a magnetic field to directly act on the cooking pot, its thermal efficiency is significantly higher than that of traditional open flame heating.

[0003] However, the electromagnetic rice cooker products described above are prone to uneven heat distribution in the cooking pot, which can cause uneven heating of the rice inside the pot and affect the cooking effect. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cooking device in which the space between the excitation coil assembly and the outer shell contains only a separating medium, reducing interference from other substances on the magnetic field generated by the excitation coil assembly, ensuring the uniformity of the magnetic field within the cavity, and improving the cooking effect.

[0005] A cooking device according to an embodiment of the present invention includes: a cooking body comprising a shell, an inner support member, and an excitation coil assembly; the inner support member is disposed inside the shell and defines a cavity for placing a cooking pot; the excitation coil assembly is located between the inner support member and the shell for heating the cooking pot; a partition space is defined between the shell and the excitation coil assembly, wherein all materials within the partition space are partition media, and the relative permeability of the partition media is μ. r , 0.9≤μ r ≤2; Cover assembly, located on the cooking body, for opening and closing the placement opening of the receiving cavity.

[0006] According to the cooking device of this utility model embodiment, the space between the excitation coil assembly and the outer shell contains only a separating medium, and the relative permeability of the separating medium is μ. r , 0.9≤μ r The relative permeability is ≤2, meaning that there will be no materials with a relative permeability exceeding 2 in the partition space. This avoids the influence of materials with a relative permeability exceeding 2 on the magnetic field generated by the excitation coil assembly, ensuring the uniformity of the magnetic field in the cavity when the excitation coil assembly is working. This, in turn, ensures the uniformity of the heat generated by the cooking pot and improves the cooking effect of the cooking equipment.

[0007] In some embodiments, the separating medium includes one or more of air, plastic, glass, and adhesive.

[0008] In some embodiments, the separating medium includes a plurality of fixed supports, which are distributed circumferentially along the excitation coil assembly. The excitation coil assembly is fixed to the inner support by the plurality of fixed supports. Each fixed support is made of plastic and has no magnetic structure.

[0009] In some embodiments, the excitation coil assembly includes a first excitation coil and a second excitation coil spaced apart, wherein the first excitation coil corresponds to the bottom wall of the cooking pot, and the second excitation coil corresponds to the peripheral wall of the cooking pot.

[0010] In some embodiments, the first excitation coil includes multiple first coil layers stacked in the direction toward the housing; and / or, the second excitation coil includes multiple second coil layers stacked in the direction toward the housing.

[0011] In some embodiments, the first excitation coil includes a plurality of coil groups, which are arranged at intervals in the radial direction of an imaginary circle, with a distance greater than 12 mm between two adjacent coil groups. The center of the imaginary circle is located on the central axis of the first excitation coil, and the imaginary circle is located on a plane perpendicular to the central axis. Alternatively, the plurality of coil groups are arranged at equal intervals in the radial direction of the imaginary circle. Alternatively, the area in which the projection of each coil group on the bottom wall of the cooking pot is located is an annular region. Alternatively, among the plurality of coil groups, the area in which the projection of the outermost coil group on the bottom wall of the cooking pot is located is an annular region, and the diameter of the outer contour line of the annular region is greater than or equal to 140 mm.

[0012] In some embodiments, the minimum width of the partition space is B, where B ≥ 20 mm, in the direction from the housing to the excitation coil assembly.

[0013] In some embodiments, the inner support includes: a mounting cylinder and a coil bracket, the mounting cylinder being connected to the outer casing, the mounting cylinder having openings at both its upper and lower ends, the coil bracket being disposed at the bottom end of the mounting cylinder for mounting the excitation coil assembly, and the mounting cylinder and the coil bracket defining the receiving cavity.

[0014] In some embodiments, the coil support and the mounting cylinder are detachably coupled.

[0015] In some embodiments, the surface of the coil support facing the housing is provided with a plurality of blades, and a winding groove is defined between two adjacent blades, with at least a portion of the excitation coil assembly embedded in the winding groove; or, the excitation coil assembly is bonded to the coil support.

[0016] In some embodiments, the cooking device is a rice cooker or a pressure cooker; and / or, the heating power of the cooking device is less than 1500W.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a cross-sectional view of a cooking device according to an embodiment of the present utility model; Figure 2 yes Figure 1 Enlarged view of section A; Figure 3 This is a schematic diagram showing the assembly of the cooking pot, coil support, and excitation coil assembly; Figure 4 This is a schematic diagram of an excitation coil assembly according to some embodiments of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of an excitation coil assembly according to some embodiments of the present invention. Figure 2 ; Figure 6 This is a schematic diagram showing the assembly of the coil support, excitation coil assembly, and fixed support. Figure 7 It is a cross-sectional view of the working structure of the coil support, excitation coil assembly and fixed support.

[0019] Reference numerals: 100, cooking equipment; 1, cooking body; 11, outer shell; 12, inner support; 121, receiving cavity; 122, mounting cylinder; 123, coil bracket; 1231, mounting hole; 1232, blade; 1233, clearance opening; 124, fixing bracket; 13, partition space; 2, cover assembly; 3, excitation coil assembly; 31, first excitation coil; 311, first coil layer; 312, coil group; 32, second excitation coil; 321, second coil layer; 4, power board; 5, thermostat; 6, cooking pot. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following is for reference. Figures 1-7 A cooking apparatus 100 according to an embodiment of the present utility model is described.

[0023] Reference Figure 1 , Figure 2 and Figure 3 According to an embodiment of the present invention, a cooking device 100 includes a cooking body 1 and a cover assembly 2. The cooking body 1 includes a shell 11, an inner support member 12, and an excitation coil assembly 3. The inner support member 12 is disposed inside the shell 11 and defines a receiving cavity 121 for placing a cooking pot 6. The excitation coil assembly 3 is located between the inner support member 12 and the shell 11 for heating the cooking pot 6. The cover assembly 2 is disposed on the cooking body 1 and is used to open and close the placement opening of the receiving cavity 121.

[0024] The cooking device 100 in this embodiment can be either a rice cooker or a pressure cooker; this invention does not limit it to either. When the cooking device 100 is in operation, the placement opening is first opened through the lid assembly 2, and the cooking pot 6 is placed in the receiving cavity 121. The excitation coil assembly 3 operates to generate a magnetic field, which acts on the cooking pot 6 to generate heat, thereby heating the food inside the cooking pot 6.

[0025] In this embodiment of the invention, a partition space 13 is defined between the outer shell 11 and the excitation coil assembly 3. All materials within the partition space 13 are partition media, and the relative permeability of the partition media is μ. r , 0.9≤μ r ≤2.

[0026] The relative permeability of a material is a physical quantity that characterizes the material's magnetic permeability compared to that of a vacuum. It reflects the material's ability to enhance or weaken magnetic flux in a magnetic field. Relative permeability is dimensionless, and its value reflects the difference in the material's magnetic permeability. The relative permeability of a vacuum is defined as 1, serving as a benchmark for measuring other materials. In related technologies, the relative permeability of magnetic strips is typically between 500 and 20,000, or even higher. The higher the relative permeability, the stronger the guiding effect on the magnetic field. However, due to the effect of the magnetic strip on the magnetic field, the magnetic field strength in the area where the cookware is located is uneven. The magnetic field strength is higher near the magnetic strip and lower further away. Within this distinct magnetic field, the heat generated in the cooking pot 6 will also vary, resulting in uneven heating of the rice inside the pot 6, leading to uneven texture and affecting the user's eating experience.

[0027] In this embodiment of the invention, the relative permeability of the separating medium is μ. r , 0.9≤μ r ≤2, which means that the effect of the separating medium on the magnetic field is very small and can be ignored.

[0028] According to the cooking device 100 of this utility model embodiment, all positions within the partition space 13 between the excitation coil assembly 3 and the outer casing 11 are partition media, and the relative permeability of the partition media is μ. r , 0.9≤μ r The relative permeability is ≤2, meaning that there will be no material with a relative permeability exceeding 2 within the partition space 13. This avoids the influence of materials with a relative permeability exceeding 2 on the magnetic field generated by the excitation coil assembly 3, ensuring the uniformity of the magnetic field within the receiving cavity 121 when the excitation coil assembly 3 is working. This, in turn, ensures the uniformity of the heat generated by the cooking pot 6 and improves the cooking effect of the cooking device 100. In some embodiments, the partition medium includes one or more of air, plastic, glass, and adhesive.

[0029] The relative permeability of air is 1.00000004, which is very close to the permeability of vacuum and can be approximated as 1. The relative permeability of different types of plastics varies slightly, but is generally close to 1. The relative permeability of glass is also about 1, and when a magnetic field passes through glass, it is basically not significantly affected. Glue is usually a non-magnetic material, and its relative permeability is also close to 1.

[0030] For example, the separating medium includes one of air, plastic, glass and glue, and the separating medium in the separating space 13 may be entirely air, or entirely plastic, glass or glue.

[0031] For example, the separating medium includes multiple of the following: air, plastic, glass, and adhesive. It can be that a plastic bracket is provided in the separating space 13, the plastic bracket is supported between the excitation coil assembly 3 and the outer shell 11, and the hollow part of the plastic bracket is provided with air; or, a hollow glass piece is provided in the separating space 13, the glass piece is supported between the excitation coil assembly 3 and the outer shell 11, and the glass piece is provided with air; or, a plastic piece is provided in the separating space 13, and the plastic piece is glued to the side of the excitation coil assembly 3 away from the inner support member 12.

[0032] It should be understood that the separating medium in the separating space 13 can also be other materials, as long as the relative magnetic permeability of the substances in the separating space 13 does not exceed 2. This utility model does not impose any restrictions on this.

[0033] In some specific embodiments, the separating medium includes multiple fixed supports 124, which are distributed circumferentially along the excitation coil assembly 3. The excitation coil assembly 3 is fixed to the inner support 12 by the multiple fixed supports 124. Each fixed support 124 is made of plastic and has no magnetic structure.

[0034] In this embodiment of the application, the separating medium includes a fixing bracket 124 for fixing the excitation coil assembly 3, which improves the stability of the excitation coil assembly 3. Furthermore, multiple fixing brackets 124 are provided, which further improves the stability of the excitation coil assembly 3.

[0035] In some embodiments, the excitation coil assembly 3 includes a first excitation coil 31 and a second excitation coil 32 spaced apart, the first excitation coil 31 corresponding to the bottom wall of the cooking pot 6, and the second excitation coil 32 corresponding to the peripheral wall of the cooking pot 6.

[0036] In this embodiment of the present invention, the first excitation coil 31 corresponds to the bottom wall of the cooking pot 6, ensuring the heat supply to the core heating area at the bottom of the cooking pot 6 and meeting the basic requirements for cooking food; the second excitation coil 32 corresponds to the peripheral wall of the cooking pot 6, allowing the peripheral wall of the cooking pot 6 to also generate heat, increasing the heating area of ​​the cooking pot 6, greatly improving the uniformity of food heating, and effectively improving the cooking effect of the cooking equipment 100.

[0037] In some further embodiments, the first excitation coil 31 and the second excitation coil 32 are connected in series.

[0038] The above technical solution simplifies the circuit design of the cooking equipment 100. Only one controller and one drive circuit are needed to drive two excitation coils at the same time. The circuit structure is simpler and the cost of the cooking equipment 100 is effectively reduced.

[0039] Reference Figure 1 and Figure 2 In some embodiments, the first excitation coil 31 includes multiple first coil layers 311, which are stacked in the direction toward the housing 11.

[0040] In this embodiment of the invention, multiple layers of first coil 311 are stacked, which concentrates the magnetic field generated by the multiple layers of first coil 311 in the same area. This can significantly enhance the magnetic field strength in the area where the bottom wall of the cooking pot 6 is located, effectively improve the heating effect of the bottom wall of the cooking pot 6, and improve the cooking efficiency of the cooking equipment 100.

[0041] In some embodiments, the first excitation coil 31 includes two first coil layers 311, which reduces the cost of the cooking device 100. In other embodiments, the number of first coil layers 311 can also be three, four, or other numbers of layers. This utility model does not limit this.

[0042] In some embodiments, the second excitation coil 32 includes multiple layers of second coil 321, which are stacked in the direction toward the housing 11.

[0043] In this embodiment of the invention, the multi-layer second coil layer 321 is stacked to concentrate the magnetic field generated by the multi-layer second coil layer 321 in the same area, which can significantly enhance the magnetic field strength in the area where the peripheral wall of the cooking pot 6 is located, effectively improve the heating effect of the peripheral wall of the cooking pot 6, and improve the cooking efficiency of the cooking equipment 100.

[0044] In some embodiments, the second excitation coil 32 includes two layers of second coil 321, which reduces the cost of the cooking device 100. In other embodiments, the number of layers of the second coil 321 can also be three, four, or other layers. This utility model does not limit this.

[0045] In some embodiments, the number of layers in the first coil layer 311 is the same as the number of layers in the second coil layer 321.

[0046] For example, the first coil layer 311 is provided with two layers, and the second coil layer 321 is also provided with two layers.

[0047] For example, the first coil layer 311 is provided with three layers, and the second coil layer 321 is also provided with three layers.

[0048] In this embodiment of the invention, the number of layers in the first coil layer 311 is the same as the number of layers in the second coil layer 321, which is beneficial to improving the uniformity of heat distribution on the bottom and perimeter walls of the cooking pot 6 and thus improving the cooking effect of the cooking equipment 100.

[0049] Reference Figure 4 and Figure 5 In some embodiments, the first excitation coil 31 includes a plurality of coil groups 312, which are arranged at intervals in the radial direction of an imaginary circle, with the distance between two adjacent coil groups 312 being greater than 12 mm.

[0050] It should be noted that the center of the imaginary circle is located on the central axis of the first excitation coil 31, and the imaginary circle is located on a plane perpendicular to the central axis.

[0051] In this embodiment of the invention, multiple coil groups 312 are arranged at intervals in the radial direction of the imaginary circle, and the distance between two adjacent coil groups 312 is greater than 12mm. This makes the magnetic field generated by the multiple coil groups 312 more dispersed and effectively weakened in the radial direction of the imaginary circle. This results in a more uniform magnetic field in the area where the bottom wall of the cooking pot 6 is located. For the cooking device 100 that requires a uniform heat field to cook rice, this can effectively improve its cooking performance.

[0052] In some specific embodiments, the spacing between two adjacent coil groups 312 can be 13mm, 14mm, 16mm or other sizes, and this utility model does not limit this.

[0053] In some embodiments, the area where each coil group 312 is projected onto the bottom wall of the cooking pot 6 is annular.

[0054] The annular coil assembly 312 generates a highly symmetrical magnetic field centered on the center, resulting in a more uniform eddy current distribution on the bottom wall of the cooking pot 6. This ensures consistent temperature across the entire heating zone, effectively preventing localized overheating or heating dead zones, and further improving the cooking effect of the cooking equipment 100. Furthermore, the annular coil assembly 312 is easy to wind, which helps improve the production efficiency of the cooking equipment 100.

[0055] In some embodiments, a plurality of coil groups 312 are arranged at equal intervals in the radial direction of an imaginary circle.

[0056] In this embodiment of the invention, the arrangement of the multiple coil groups 312 is simple, and the equidistant arrangement is conducive to further improving the uniformity of the magnetic field in the area where the bottom wall of the cooking pot 6 is located, thereby effectively improving the cooking performance of the cooking equipment 100.

[0057] In some specific embodiments, the first excitation coil 31 includes three coil groups 312, which are arranged at equal intervals in the radial direction of an imaginary circle. (Refer to...) Figure 6 In some other embodiments, the first excitation coil 31 may also be a coil group 312. In other embodiments, the first excitation coil 31 may also include two, four or other numbers of coil groups 312. This utility model does not limit this.

[0058] Reference Figure 5 In some embodiments, among the multiple coil groups 312, the area where the projection of the outermost coil group 312 on the bottom wall of the cooking pot 6 is located is an annular area; wherein, the diameter of the outer contour line of the annular area is greater than or equal to 140 mm.

[0059] If the diameter of the outer contour line of the annular area is less than 140mm, the overall power of the first excitation coil 31 will be low, resulting in poor heating effect on the bottom wall of the cooking pot 6 and affecting the cooking effect of the cooking equipment 100.

[0060] In this embodiment of the invention, the diameter of the outer contour line of the annular region is greater than or equal to 140mm, which ensures that the first excitation coil 31 has sufficient power and ensures the cooking efficiency of the cooking device 100.

[0061] In some specific embodiments, the diameter of the outer contour line of the annular region can be 140mm, 150mm, 160mm, 170mm or other sizes, and this utility model does not limit this.

[0062] Reference Figure 1 In some embodiments, the minimum width of the partition space 13 in the direction from the housing 11 to the excitation coil assembly 3 is B, where B ≥ 20 mm.

[0063] In this embodiment, even when the user places the cooking device 100 near a material with relatively high magnetic permeability similar to a magnetic strip, the distance between the material with relatively high magnetic permeability and the excitation coil assembly 3 is greater than 20mm. The influence on the magnetic field generated by the excitation coil assembly 3 is very weak and has almost no effect, thereby ensuring the uniformity of the magnetic field in the accommodating cavity 121 and ensuring the stability of the operation of the cooking device 100.

[0064] In some specific embodiments, the excitation coil assembly 3 includes a first excitation coil 31 and a second excitation coil 32 spaced apart. The first excitation coil 31 corresponds to the bottom wall of the cooking pot 6, and the second excitation coil 32 corresponds to the peripheral wall of the cooking pot 6. The minimum width B of the partition space 13 can be the distance between the first excitation coil 31 and the outer shell 11 in the vertical direction, or it can be the distance between the second excitation coil 32 and the outer shell 11 in the horizontal direction.

[0065] In some embodiments, the heating power of the cooking device is less than 1500W.

[0066] In this embodiment, the heating power of the cooking device is relatively small, and there is no need for a magnetic structure to guide the magnetic field to meet the heating requirements.

[0067] Reference Figure 1 and Figure 3 In some embodiments, the inner support member 12 includes: a mounting cylinder 122 and a coil bracket 123. The mounting cylinder 122 is connected to the outer shell 11. Both the upper and lower ends of the mounting cylinder 122 are provided with openings. The coil bracket 123 is disposed at the bottom end of the mounting cylinder 122 for mounting the excitation coil assembly 3. A receiving cavity 121 is defined between the mounting cylinder 122 and the coil bracket 123.

[0068] In this embodiment of the invention, the inner support member 12 has a simple structure, is easy to manufacture, and reduces the cost of the cooking equipment 100. Furthermore, the excitation coil assembly 3 can be directly mounted on the coil bracket 123 of the inner support member 12, which helps to reduce the distance between the excitation coil assembly 3 and the cooking pot 6, increasing the magnetic field strength at the location of the cooking pot 6, thereby improving the heating effect of the excitation coil assembly 3 on the cooking pot 6.

[0069] Reference Figure 1 , Figure 3 and Figure 6 In some embodiments, the coil support 123 and the mounting cylinder 122 are detachably coupled.

[0070] During the assembly of the cooking equipment 100, the excitation coil assembly 3 can be first installed on the coil bracket 123, and then the coil bracket 123 can be installed on the mounting cylinder 122. This improves the assembly efficiency of the excitation coil assembly 3 and the production efficiency of the cooking equipment 100. Furthermore, since the excitation coil assembly 3 is a core component of the cooking equipment 100, the coil bracket 123 and mounting cylinder 122 are detachably connected, facilitating the installation and removal of the excitation coil assembly 3 and reducing its maintenance costs.

[0071] In some specific embodiments, the spool bracket 123 has multiple mounting holes 1231 on its periphery, and the mounting cylinder 122 is provided with a mounting post corresponding to each mounting hole 1231. Fasteners pass through the mounting holes 1231 and are threadedly connected to the corresponding mounting posts, thereby detachably mounting the spool bracket 123 to the mounting cylinder 122.

[0072] In this embodiment of the invention, the connection between the coil bracket 123 and the mounting cylinder 122 is simple, which reduces the cost of the cooking equipment 100.

[0073] It should be understood that the coil bracket 123 can also be snapped onto the mounting cylinder 122 via a snap-fit ​​structure, and this utility model does not limit this.

[0074] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, the surface of the coil support 123 facing the housing 11 is provided with a plurality of blades 1232, and a winding groove is defined between two adjacent blades 1232, and at least a portion of the excitation coil assembly 3 is embedded in the winding groove.

[0075] In this embodiment of the utility model, the connection between the excitation coil assembly 3 and the coil support 123 is simple, which reduces the installation difficulty of the excitation coil assembly 3 and eliminates the need for other fixing structures, thus simplifying the structure of the cooking equipment 100 and reducing the cost of the cooking equipment 100. Furthermore, the blade 1232 can also improve the strength of the coil support 123 and extend the service life of the cooking equipment 100.

[0076] In some further embodiments, the bottom end of the coil support 123 is provided with a first leaf 1232 extending vertically; at least a portion of the first excitation coil 31 is embedded between two adjacent first leaf 1232, and the periphery of the coil support 123 is provided with a second leaf 1232 extending horizontally, and at least a portion of the second excitation coil 32 is embedded between two adjacent second leaf 1232, thereby fixing the first excitation coil 31 and the second excitation coil 32.

[0077] Reference Figure 6 and Figure 7 In some other embodiments, a fixing bracket 124 is provided on the surface of the coil support 123 facing the housing 11, and the excitation coil assembly 3 is fixed to the coil support 123 by the fixing bracket 124, which is a plastic part.

[0078] For example, the fixed bracket 124 is snapped onto the coil bracket 123 via a snap-fit ​​structure, and the excitation coil assembly 3 is sandwiched between the fixed bracket 124 and the coil bracket 123. It should be understood that the fixed bracket 124 can also be fixed to the coil bracket 123 by screws, and this utility model does not limit this.

[0079] In some other embodiments, the excitation coil assembly 3 is bonded to the coil support 123, which further simplifies the structure of the cooking device 100 and further reduces the cost of the cooking device 100.

[0080] It should be understood that in other embodiments, the excitation coil assembly 3 may also be fixed to the coil bracket 123 in other ways, and this application does not limit this.

[0081] Reference Figure 1 In some embodiments, the cooking device 100 is further provided with a power board 4, which is disposed inside the housing 11. The power board 4 is located on the periphery of the inner support member 12 and is spaced apart from the inner support member 12. The power board 4 is connected to the excitation coil assembly 3 through a wiring harness for powering the excitation coil assembly 3.

[0082] In this embodiment of the utility model, the power board 4 is located on the periphery of the inner support member 12 and is spaced apart from the inner support member 12, which avoids the power board 4 being affected by the magnetic field and ensures the reliability of the cooking equipment 100.

[0083] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments, the cooking device 100 further includes a thermostat 5, which is disposed inside the housing 11. The inner support member 12 is provided with an avoidance opening 1233, and the detection end of the thermostat 5 passes through the avoidance opening 1233 to detect the temperature of the cooking pot 6.

[0084] For example, the first excitation coil 31 is annular, and the temperature controller 5 is located radially inside the first excitation coil 31. In this embodiment of the invention, the cooking device 100 can control the working state of the excitation coil assembly 3 in real time according to the temperature detected by the thermostat 5, which effectively improves the cooking effect of the cooking device 100.

[0085] In some specific embodiments, the cooking device 100 is a rice cooker. Other components of the rice cooker according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooking device, characterized in that, include: The cooking body includes an outer shell, an inner support member, and an excitation coil assembly. The inner support member is located inside the outer shell and defines a cavity for housing the cooking pot. The excitation coil assembly is located between the inner support member and the outer shell for heating the cooking pot. A separation space is defined between the outer casing and the excitation coil assembly, and all materials within the separation space are separation media with a relative permeability of μ. r , 0.9≤μ r ≤2; A cover assembly, disposed on the cooking body, is used to open and close the placement opening of the receiving cavity.

2. The cooking apparatus according to claim 1, characterized in that, The separating medium includes one or more of air, plastic, glass, and adhesive.

3. The cooking apparatus according to claim 1, characterized in that, The separating medium includes multiple fixed supports, which are distributed circumferentially along the excitation coil assembly. The excitation coil assembly is fixed to the inner support member by the multiple fixed supports. Each fixed support is made of plastic and has no magnetic structure.

4. The cooking apparatus according to claim 1, characterized in that, The excitation coil assembly includes a first excitation coil and a second excitation coil spaced apart. The first excitation coil corresponds to the bottom wall of the cooking pot, and the second excitation coil corresponds to the peripheral wall of the cooking pot.

5. The cooking apparatus according to claim 4, characterized in that, The first excitation coil includes multiple first coil layers, which are stacked in the direction toward the outer casing; And / or, the second excitation coil includes multiple layers of second coil layers stacked in the direction toward the housing.

6. The cooking apparatus according to claim 4, characterized in that, The first excitation coil includes multiple coil groups, which are arranged at intervals in the radial direction of an imaginary circle. The distance between two adjacent coil groups is greater than 12 mm. The center of the imaginary circle is located on the central axis of the first excitation coil, and the imaginary circle is located on a plane perpendicular to the central axis. Alternatively, multiple coil groups may be arranged at equal intervals in the radial direction of the imaginary circle; Alternatively, the area where the projection of each coil group on the bottom wall of the cooking pot is located is annular; Alternatively, in the plurality of coil groups, the projection area of ​​the outermost coil group on the bottom wall of the cooking pot is an annular region, and the diameter of the outer contour line of the annular region is greater than or equal to 140 mm.

7. The cooking apparatus according to claim 1, characterized in that, The minimum width of the partition space in the direction from the housing to the excitation coil assembly is B, where B ≥ 20 mm.

8. The cooking apparatus according to claim 1, characterized in that, The inner support includes a mounting cylinder and a coil bracket. The mounting cylinder is connected to the outer shell. Both the upper and lower ends of the mounting cylinder are provided with openings. The coil bracket is disposed at the bottom end of the mounting cylinder for mounting the excitation coil assembly. The mounting cylinder and the coil bracket define the receiving cavity.

9. The cooking apparatus according to claim 8, characterized in that, The coil support and the mounting cylinder are detachably coupled.

10. The cooking apparatus according to claim 9, characterized in that, The surface of the coil support facing the outer casing is provided with a plurality of blades, and a winding groove is defined between two adjacent blades. At least a portion of the excitation coil assembly is embedded in the winding groove. Alternatively, the excitation coil assembly may be bonded to the coil support.

11. The cooking apparatus according to any one of claims 1-10, characterized in that, The cooking device is a rice cooker or a pressure cooker; and / or, the heating power of the cooking device is less than 1500W.

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