Heating device and cooking utensil

Abstract

The utility model discloses a heating device and a cooking utensil. The heating device is used for heating a cooking container of the cooking utensil. The heating device comprises a wire disc seat and a plurality of wire windings. The multiple wire windings are arranged on the side, opposite to the cooking container, of the wire disc base, and the multiple wire windings are arranged in the circumferential direction or the radial direction of the wire disc base at intervals, so that when the cooking utensil works, a local temperature difference area is formed on the inner surface of the cooking container. Wherein a winding region, at least corresponding to the plurality of wire windings, of the wire reel seat is configured as a visible region, and the visible region is used for showing the wire windings or highlighting the winding region. According to the heating device, local non-uniform heating is formed in the cooking container, heat convection in the container is promoted, food materials are heated uniformly, the heating area is visualized, and a user can observe the non-uniform heating characteristic formed by a plurality of wire windings.

Description

Technical Field

[0001] This utility model relates to the technical field of kitchen appliances, and more specifically to a heating device and a cooking utensil. Background Technology

[0002] Some current cooking appliances employ multi-zone coil heating technology, creating temperature differences across multiple zones within the cooking container to promote convection and ensure even cooking. However, this multi-zone coil structure is located inside the appliance and is not visible to the user, thus compromising the user experience.

[0003] Therefore, a heating device and cooking appliance are needed 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 a heating device for heating the cooking container of a cooking appliance, the heating device comprising:

[0006] Conductor tray; and

[0007] Multiple wire windings are provided on the side of the wire coil seat facing away from the cooking container, and the multiple wire windings are spaced apart in the circumferential or radial direction of the wire coil seat, so that when the cooking appliance is in operation, a local temperature difference area is formed on the inner surface of the cooking container.

[0008] The winding area of ​​the conductor reel base corresponding to at least the plurality of conductor windings is configured as a visible area, which is used to show the conductor windings or highlight the winding area.

[0009] According to the heating device of this utility model, when heating a cooking container, the inner surface of the cooking container is heated in areas corresponding to the wire windings, and cooled in areas corresponding to the intervals between the wire windings, thus creating a local temperature difference zone between the two areas, i.e., generating a significant temperature gradient. This temperature gradient creates localized uneven heating, prompting faster and more intense heat convection within the cooking container, resulting in more thorough boiling and churning of the liquid and ingredients, more even heating of the ingredients, and better consistency in the cooking effect. Simultaneously, the winding areas of the wire coil base corresponding to multiple wire windings are constructed as a visible area, making the heating area visible. After removing the cooking container, the user can observe the location, area, and shape of the heating area through the visible area. This observation allows the user to understand the heating characteristics of the device, such as uneven heating in multiple localized areas. The user can intuitively understand that the cooking appliance has the function of localized uneven heating of the cooking container, thereby improving the user experience.

[0010] Optionally, at least the winding area of ​​the conductor reel is configured to be transparent to form the visible area, which is used to show the conductor winding. According to this solution, the user can directly see the conductor winding disposed below the conductor reel through the transparent visible area of ​​the conductor reel, and intuitively understand the multi-area arrangement, winding method, winding shape, and other information of the conductor winding, thereby understanding the heating characteristics of the heating device.

[0011] Optionally, the winding area of ​​the wire coil seat has a coating on its surface facing the cooking container to form the visible area, which at least highlights the outer contour shape and position information of the winding area. According to this solution, the shape and position of the coating correspond to the wire winding below the wire coil seat, allowing the user to understand the heating characteristics of the heating device through information such as the multi-area arrangement, area, and shape of the wire winding displayed by the coating.

[0012] Optionally, the winding area of ​​the conductor reel is configured as a temperature-sensitive color-changing area to form the visible area, which is used to highlight the winding area at different temperatures. According to this solution, when the user removes the inner pot, the color change of the temperature-sensitive color-changing area can intuitively indicate the temperature status of the winding area to the user, preventing the user from being burned by the high-temperature winding area.

[0013] Optionally, the winding area of ​​the wire coil holder has a color-changing coating on the surface facing the cooking container; or the winding area of ​​the wire coil holder is made of a color-changing material.

[0014] According to this solution, a color-changing coating can be formed by spraying color-changing paint onto the surface of the conductor reel, or a color-changing material can be formed by adding color-changing paint inside the conductor reel. The setup method is simple. The color-changing coating and color-changing material can change color with the temperature of the conductor reel, allowing users to quickly and intuitively obtain temperature information of the winding area.

[0015] Optionally, the wire reel holder includes a reel holder body and at least one wire base independent of the reel holder body. The at least one wire base is connected to the reel holder body, and the wire base forms the visible area. According to this solution, the wire base and the reel holder body are set independently. On the one hand, this facilitates the separate design and production of the wire base and the reel holder body, and the wire base is constructed as a separate visible area, making manufacturing easier and reducing material costs. On the other hand, winding the wires on a smaller wire base is easier to operate, and the winding efficiency is high, which can improve the assembly efficiency of the heating device.

[0016] Optionally, the conductors of the plurality of conductor windings are connected in series, and there is one conductor base including multiple winding regions, with the plurality of conductor windings respectively disposed in the plurality of winding regions of the conductor base. According to this solution, a single conductor base can simultaneously wind multiple conductor windings at different positions. During assembly, this conductor base with multiple conductor windings can be assembled to the disc body in one go, reducing the number of operation steps for the heating device and increasing assembly efficiency.

[0017] Alternatively, the plurality of wire windings are each set independently, and the wire reel seat includes a plurality of wire bases, each wire base having a winding area, and each wire winding being disposed in the winding area of ​​the corresponding wire base. According to this solution, the plurality of wire windings can be controlled independently, making the heating method flexible and allowing each wire winding to be observed and maintained individually.

[0018] Optionally, the main body of the tray has a perforated hole, and the wire base is located within the perforated hole. According to this solution, the perforated hole in the main body of the tray provides space for the wire base, facilitating its positioning and installation, and allowing for a tight connection between the wire base and the main body of the tray, resulting in a compact heating device structure. Furthermore, it allows the wire winding to be located below the wire tray, facilitating the routing of electrical wires from below the tray to connect with the wire winding.

[0019] Optionally, the heating device further includes a sealing element, which is arranged circumferentially along the conductor reel seat and is at least disposed between the reel seat body and the conductor base, and the sealing element is respectively disposed at the top and bottom ends of the conductor reel seat. According to this solution, the sealing element facilitates waterproofing of the conductor winding and prevents water from entering the conductor due to user error.

[0020] Optionally, the outer contour of the conductor base corresponds in shape to the outer contour of the conductor winding. According to this solution, the conductor base can be made entirely transparent or coated to show the shape and position information of the conductor winding, thus simplifying the manufacturing of the conductor base.

[0021] Optionally, the at least one conductor base is detachably connected to the disk base body. According to this solution, the detachable connection between the conductor base and the disk base body facilitates the installation and maintenance of the conductor windings.

[0022] Optionally, the plurality of conductor windings are arranged at intervals in the circumferential direction, and the width of the winding area of ​​each conductor winding gradually increases radially outward in the circumferential direction.

[0023] According to this solution, the wire winding can be formed into a gradually widening pattern, including fan-shaped and similar designs. Compared to other shapes such as rings, circles, and polygons, the gradually widening wire winding has the structural characteristic of becoming narrower closer to the center of the heating device and wider further away from the center. This characteristic allows the wire winding to cover a larger area at the bottom of the cooking container, ensuring the overall heating efficiency of the heating device, and also providing a large coverage area for local temperature difference zones, achieving a large-scale uneven heating and boiling effect.

[0024] The second aspect of this utility model provides a cooking appliance, which includes a cooking container and a heating device as described in any one of the first aspects above, wherein the heating device is used to heat the cooking container of the cooking appliance. Attached Figure Description

[0025] The following drawings, which are incorporated herein by reference as part of this invention, are provided for understanding the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention.

[0026] Figure 1 This is a schematic diagram of the structure of a cooking appliance according to one embodiment of this application;

[0027] Figure 2 for Figure 1 A partial cross-sectional schematic diagram of the cooking appliance shown;

[0028] Figure 3 for Figure 1 An exploded view of the cooking utensils shown;

[0029] Figure 4 This is a top view schematic diagram of a heating device according to one embodiment of this application;

[0030] Figure 5 for Figure 4 A bottom view of the heating device shown;

[0031] Figure 6 for Figure 4 An exploded view of the heating device shown.

[0032] Figure 7 for Figure 4 A schematic cross-sectional view of the heating device shown;

[0033] Figure 8 for Figure 4 A top view of the main body of the heating device shown;

[0034] Figure 9 for Figure 4 A bottom view of the heating device's wire base and wire windings;

[0035] Figure 10 for Figure 4 A top view of the wire base of the heating device shown;

[0036] Figure 11 for Figure 9 A schematic cross-sectional view of the conductor base and conductor winding shown;

[0037] Figure 12 This is a top view schematic diagram of a heating device according to another embodiment of this application;

[0038] Figure 13 for Figure 12 A bottom view of the heating device shown; and

[0039] Figure 14 for Figure 1 A bottom view of the cooking appliance shown.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10: Wire tray holder

[0042] 11: Main body of the tray

[0043] 12: Conductor base

[0044] 13: Winding area

[0045] 14: Hollowed-out holes

[0046] 15: Buckle

[0047] 16: Reinforcing bar

[0048] 20: Conductor winding

[0049] 30: Seals

[0050] 100: Heating device

[0051] 110: Cooking containers

[0052] 120: Cover

[0053] 130: Claypot

[0054] 131: Base

[0055] 200 / 300: Cooking utensils Detailed Implementation

[0056] 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 the present invention can 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 the present invention.

[0057] To fully understand this invention, a detailed description will be set forth in the following description. It should be understood that these embodiments are provided so that the disclosure of this invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. Obviously, the implementation of embodiments of this invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this invention are described in detail below; however, other embodiments may be implemented in addition to these detailed descriptions.

[0058] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that 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.

[0059] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0060] It should be noted that the terms “up,” “down,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this article are for illustrative purposes only and are not intended to be restrictive.

[0061] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

[0062] like Figures 1 to 3 As shown, this utility model provides a cooking appliance 200, which includes a cooking container 110 and a heating device 100 for heating the cooking container 110. The heating device 100 of the cooking appliance 200 can be an electric heating device that heats wires, making the cooking appliance 200, for example, a regular rice cooker, an electric stove equipped with a cooking container, a pressure cooker, etc. Alternatively, the heating device 100 of the cooking appliance 200 can be an electromagnetic heating device such as a wire coil, making the cooking appliance 200, for example, an IH rice cooker, an induction cooker equipped with a cooking container 110, an IH pressure cooker, etc., an electromagnetic cooking appliance with electromagnetic heating, in which case the cooking container 110 includes a magnetically conductive material. In addition to the function of cooking rice, the cooking appliance 200 can also have various functions such as cooking porridge.

[0063] The cooking appliance 200, such as a rice cooker, includes a cooker body 130 and a lid 120. The cooker body 130 has a cylindrical cooking container 110 storage section. The cooking container 110 can be freely placed into or removed from the cooking container 110 storage section for easy cleaning. The cooking container 110 is typically made of metal and has a circular opening on its upper surface for holding materials to be heated, such as rice or soup. The cooker body 130 includes a heating device 100 for heating the cooking container 110.

[0064] The lid 120 has a shape substantially corresponding to the pot body 130. The lid 120 is closable on the pot body 130; specifically, it is pivotally connected to the pot body 130 via a pivot axis and can freely pivot about the pivot axis between a closed position and an open position relative to the pot body 130, facilitating the closing and opening of the pot body 130. When the lid 120 is closed on the pot body 130, it covers the cooking container 110, forming a cooking space between the lid 120 and the cooking container 110. The lid 120 typically also has a pot rim sealing ring, which may be made of, for example, rubber material, and is disposed between the lid 120 and the cooking container 110 to seal the cooking space when the lid 120 is in the closed state.

[0065] For cooking containers 110, removable cooking utensils 200, such as Figures 4 to 7As shown, this utility model provides a heating device 100 for heating the cooking container 110 of a cooking appliance 200. The heating device 100 includes a wire coil base 10 and multiple wire windings 20. The multiple wire windings 20 are disposed on the side of the wire coil base 10 facing away from the cooking container 110, for example, by being wound around the surface of the wire coil base 10 via baffles 16 provided on the wire coil base 10. The multiple wire windings 20 are spaced apart circumferentially or radially on the wire coil base 10, so that when the cooking appliance 200 is in operation, a local temperature difference region is formed on the inner surface of the cooking container 110. When heating the cooking container 110 using this heating device 100, the inner surface of the cooking container 110 has a high temperature in the region corresponding to the wire windings 20 and a lower temperature in the region corresponding to the interval between adjacent wire windings 20, thereby forming a local temperature difference region between the two regions, i.e., generating a significant temperature gradient. By utilizing temperature gradients to create localized uneven heating, the heat convection within the pot becomes faster and more intense, resulting in more thorough boiling and churning of the liquid and ingredients, more even heating of the ingredients, and better consistency in the cooking results.

[0066] To enhance user experience and allow users to intuitively understand the uneven heating characteristics of multiple local areas of the heating device 100, the winding area 13 of the wire coil holder 10, corresponding to at least a plurality of wire windings 20, is constructed as a visible area. This visible area is used to display either the wire windings 20 or the winding area 13. The winding area 13 is the region of the wire coil holder 10 corresponding to the wire windings 20. This design makes the heating area visible; after removing the cooking container 110, the user can see the heating device 100 and observe information such as the location, area, and shape of the heating area through the visible area, thus understanding the heating characteristics of the heating device 100.

[0067] It should be noted that the wire winding 20 can be used as a heating wire to heat the cooking container 110, or as an electromagnetic wire to heat the cooking container 110, which includes a magnetically conductive material. The wire tray 10 is not limited to an arc or spherical shape; for example, it can also be a planar structure.

[0068] Specifically, multiple conductor windings 20 can be arranged at intervals in the radial direction of the conductor reel 10. One example is that the conductor windings 20 are arranged in a ring, that is, in a ring shape around the circumference of the conductor reel 10 and in a concentric ring array along the radial direction of the conductor reel 10. Optionally, the multiple conductor windings 20 can also be arranged at intervals in the circumferential direction. For example, the conductor windings 20 are configured as fan-shaped, with the width of the winding region 13 of each conductor winding 20 gradually increasing outwards from the radial direction, and multiple fan-shaped sections are spaced apart in the circumferential direction of the conductor reel 10.

[0069] In one specific implementation, at least the winding area 13 of the wire coil holder 10 is constructed to be transparent to form a visible area, which is used to show the wire winding 20. The wire coil holder 10 can be constructed entirely as transparent, or it can be constructed as a partially transparent structure including multiple transparent windows. Thus, after the user removes the cooking container 110, they can directly see the wire winding 20 disposed below the wire coil holder 10 through the transparent winding area 13 of the wire coil holder 10, intuitively obtaining information such as the multi-area arrangement, winding method, and winding shape of the wire winding 20, thereby understanding the heating characteristics of the heating device 100.

[0070] In another specific implementation, when the wire coil base 10 is constructed to be opaque, the winding area 13 of the wire coil base 10 has a coating on its surface facing the cooking container 110 to form a visible area. This visible area at least highlights the outer contour shape and positional information of the winding area 13. That is, the shape and position of the coating correspond at least to the wire winding 20 below the wire coil base 10. Users can understand the heating characteristics of the heating device 100 by observing the multi-area arrangement, area size, and shape of the wire winding 20 displayed by the coating. The coating can also display information such as the winding method of the wire winding 20 through patterns or other means.

[0071] More preferably, the winding area 13 of the conductor reel 10 is configured as a temperature-sensitive color-changing area to form a visible area, which is used to highlight the winding area 13 at different temperatures. When the user removes the inner pot, the color change of the temperature-sensitive color-changing area can intuitively indicate the temperature status of the winding area 13 to the user, preventing the user from being burned by the high temperature of the winding area 13.

[0072] In some specific embodiments, the winding region 13 of the wire coil 10 has a color-changing coating on its surface facing the cooking container 110. For example, a color-changing paint is sprayed onto the surface of the wire coil 10 to form the color-changing coating. The color of the color-changing paint is temperature-dependent, and the color-changing temperature range of the paint is, for example, 60°C-150°C. After the wire is energized, the color of the wire coil 10 gradually turns into a deep red as the temperature rises, and the higher the temperature, the deeper the red. Alternatively, the winding region 13 of the wire coil 10 is made of a color-changing material, for example, by adding a color-changing paint inside the wire coil 10 to form the color-changing material.

[0073] like Figures 8 to 11 As shown, the wire reel holder 10 includes a reel holder body 11 and at least one wire base 12 independent of the reel holder body 11. The at least one wire base 12 is connected to the reel holder body 11 and is configured as a visible area. Therefore, the wire base 12 can be designed and manufactured separately, for example, integrally constructed as transparent, making manufacturing easier and reducing material costs. Furthermore, the winding of the wire winding 20 on the smaller wire base 12 is easy to operate and has high winding efficiency, which can improve the assembly efficiency of the heating device 100.

[0074] The main body 11 of the heating element has a perforated hole 14, providing space for the wire base 12. The wire base 12 is located within the perforated hole 14, facilitating its positioning and installation. The wire base 12 can be tightly connected to the main body 11, resulting in a compact structure for the heating device 100. Furthermore, this design allows the wire winding 20 to be located below the wire base 10, facilitating the routing of electrical wires from below the wire base 10 to connect to the wire winding 20. It also promotes dust and water protection, avoiding unnecessary contact and protecting the wire winding 20.

[0075] The wire base 12 can be detachably connected to the tray body 11 by means of clip 15, or by means of adhesive bonding, secondary injection molding, inlay, etc.

[0076] In some specific embodiments, the conductors of multiple conductor windings 20 are connected in series, and there is one conductor base 12 including multiple winding regions 13. The multiple conductor windings 20 are respectively disposed in the multiple winding regions 13 of the conductor base 12. That is, a single conductor base 12 can simultaneously wind multiple conductor windings 20 at different positions. Therefore, during assembly, this conductor base 12 with multiple conductor windings 20 can be assembled to the disk body 11 in one go, resulting in higher assembly efficiency.

[0077] In other specific embodiments, such as Figure 12 and Figure 13 As shown, multiple wire windings 20 are independently arranged, meaning they can be connected in parallel, allowing for more flexible heating control. For example, the multiple wire windings 20 can be heated sequentially or in groups. Correspondingly, the wire reel holder 10 includes multiple wire bases 12, each with a winding area 13, and each wire winding 20 is located in the winding area 13 of its corresponding wire base 12. Thus, each wire winding 20 can be observed and maintained individually.

[0078] Preferably, the outer contour of the conductor base 12 corresponds in shape to the outer contour of the conductor winding 20, for example, both are fan-shaped. Of course, the outer contour of the conductor base 12 may not be the same as the outer contour of the conductor winding 20; for example, the outer contour of the conductor base 12 may also be triangular, elliptical, petal-shaped, etc. The outer contour of the conductor base 12 is preferably circular for easy assembly.

[0079] To further enhance the waterproof effect on the conductor winding 20, such as Figure 6 and Figure 7As shown, the heating device 100 also includes a sealing element 30. The sealing element 30 is arranged circumferentially around the wire coil base 10 and is at least disposed between the base body 11 and the wire base 12, with the sealing element 30 respectively located at the top and bottom ends of the wire coil base 10. Simultaneously, the base body 11 may be provided with a groove for installing the sealing element 30. The sealing element 30 may be annular, for example; specifically, two annular sealing elements 30 are respectively disposed at the top and bottom ends of the wire coil base 10. The sealing element 30 may also be arc-shaped, for example; specifically, multiple wire windings 20 and corresponding wire bases 12 are arranged circumferentially at intervals, with arc-shaped sealing elements 30 disposed between the base body 11 and the wire base 12. That is, multiple arc-shaped sealing elements 30 are arranged circumferentially at intervals, and sealing elements 30 may not be provided in the intervals between adjacent wire windings 20, or may be partially omitted.

[0080] like Figure 14 As shown, this utility model also provides a cooking appliance 300, which includes a pot body 130, a cooking container 110, and a heating device 100. The cooking container 110 is disposed inside the pot body 130, and the pot body 130 includes a base 131. The heating device 100 is disposed inside the base 131 and located below the cooking container 110. The heating device 100 includes a wire coil seat 10 and a plurality of wire windings 20, which are disposed on the side of the wire coil seat 10 facing away from the cooking container 110. Furthermore, the plurality of wire windings 20 are spaced apart circumferentially or radially on the wire coil seat 10, so that when the cooking appliance 300 is in operation, a local temperature difference region is formed on the inner surface of the cooking container 110. The area of ​​the base 131 corresponding to at least the plurality of wire windings 20 is configured as a viewing area, which is used to show the wire windings 20 or highlight the winding area 13 of the wire windings 20. Understandably, the winding area 13 is the area where the conductor winding 20 is wound on the conductor plate 10.

[0081] Therefore, according to the cooking appliance 300 of this solution, there is no need to remove the cooking container 110, or even if the cooking container 110 cannot be removed, the user can observe the location, area and shape of the heating area through the base 131. By observing the information, the user can understand the heating characteristics of the heating device 100, such as uneven heating of multiple local areas, thereby improving the user experience.

[0082] In one specific implementation, at least one area of ​​the base 131 corresponding to the plurality of wire windings 20 is constructed to be transparent to form a viewing area, which is used to show the wire windings 20. The base 131 can be constructed entirely to be transparent, or it can be constructed as a partially transparent structure including multiple transparent windows. Thus, the user can directly observe the wire windings 20 disposed in the base 131 through the transparent winding area 13 of the base 131, and obtain information such as the multi-area arrangement, winding method, and winding shape of the wire windings 20.

[0083] In another specific implementation, the area of ​​the base 131 corresponding to the multiple wire windings 20 has a coating on its surface facing away from the heating device 100 to form a visible area. This visible area serves at least to highlight the outer contour shape and positional information of the wire windings 20. That is, the shape and position of the coating correspond at least to the wire windings 20 within the base 131, allowing the user to understand the heating characteristics of the heating device 100 through information such as the multi-area arrangement, area, and shape of the wire windings 20 displayed by the coating. The coating can also display information such as the winding method of the wire windings 20 through patterns or other means.

[0084] 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. Features 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.

[0085] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes. This utility model is not limited to the above embodiments. Many 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. A heating device, characterized in that, The heating device is used for heating a cooking container in a cooking appliance, and includes: Conductor tray; and Multiple wire windings are provided on the side of the wire coil seat facing away from the cooking container, and the multiple wire windings are spaced apart in the circumferential or radial direction of the wire coil seat, so that when the cooking appliance is in operation, a local temperature difference area is formed on the inner surface of the cooking container. The winding area of ​​the conductor reel base corresponding to at least the plurality of conductor windings is configured as a visible area, which is used to show the conductor windings or highlight the winding area.

2. The heating device according to claim 1, characterized in that, At least the winding region of the conductor reel is configured to be transparent to form the visible area, which is used to show the conductor winding.

3. The heating device according to claim 1, characterized in that, The winding area of ​​the wire coil is coated on the surface facing the cooking container to form the visible area, which at least highlights the outer contour shape and position information of the winding area.

4. The heating device according to claim 1, characterized in that, The winding area of ​​the conductor reel is configured as a temperature-sensitive color-changing area to form the visible area, which is used to highlight the winding area at different temperatures.

5. The heating device according to claim 4, characterized in that, The winding area of ​​the wire reel seat has a color-changing coating on the surface facing the cooking container; or The winding area of ​​the conductor reel is made of a color-changing material.

6. The heating device according to any one of claims 1 to 5, characterized in that, The wire tray includes a tray body and at least one wire base independent of the tray body, the at least one wire base being connected to the tray body and the wire base being configured to form the visible area.

7. The heating device according to claim 6, characterized in that, The conductors of the plurality of conductor windings are connected in series, and there is one conductor base which includes a plurality of winding regions. The plurality of conductor windings are respectively disposed in the plurality of winding regions of the conductor base. or The plurality of conductor windings are each independently arranged, and the conductor reel seat includes a plurality of conductor bases, each conductor base having a winding area, and each conductor winding being disposed in the winding area of ​​the corresponding conductor base.

8. The heating device according to claim 6, characterized in that, The main body of the disk base has a hollow hole, and the wire base is located inside the hollow hole.

9. The heating device according to claim 8, characterized in that, The heating device further includes a sealing element, which is arranged circumferentially along the wire reel seat and is at least disposed between the reel seat body and the wire base, and the sealing element is respectively disposed at the top and bottom ends of the wire reel seat.

10. The heating device according to claim 6, characterized in that, The outer contour of the conductor base corresponds in shape to the outer contour of the conductor winding; and / or the at least one conductor base is detachably connected to the disk body.

11. The heating device according to any one of claims 1 to 5, characterized in that, The plurality of conductor windings are arranged at intervals in the circumferential direction, and the width of the winding area of ​​each conductor winding in the circumferential direction gradually increases from the radial direction outward.

12. A cooking utensil, characterized in that, The cooking appliance includes a cooking container and a heating device according to any one of claims 1 to 11, the heating device being used to heat the cooking container of the cooking appliance.

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