Mica heating core plate and heating assembly
By designing curved edges in the hollowed-out area of the mica heating core plate, the problems of large temperature gradient and stress concentration are solved, achieving uniform browning and processing stability of food, and reducing the risk of processing damage.
Patent Information
- Application Number
- CN202423159694.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The existing mica heating core plate has a rectangular hollow area in the middle, which results in a large local temperature gradient, uneven browning of food, and the rectangular hollow area is prone to stress concentration, increasing the risk of processing damage.
The cross-sectional edge of the hollowed-out area is designed to be curved, and the curved edge bends towards the edge of the core board body to form a curved heat distribution transition, disperse stress, reduce temperature gradient, and improve heat uniformity.
It achieves more uniform browning of food, reduces the probability of processing damage, improves the processing integrity rate, and enhances mechanical strength.
Smart Images
Figure CN223666502U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric heating technology, and in particular to a mica heating core plate and heating assembly. Background Technology
[0002] Mica heating plates, also known as mica electric heating plates, fully utilize the high-temperature resistance and electrical insulation properties of mica. They use mica sheets as the heating core, with resistance heating wires wound around it. Mica heating plates are widely used in household appliances such as ovens, microwave ovens, electronic sterilizers, and toasters.
[0003] In existing technologies, such as Figure 1 As shown, the mica heating core plate 1 of the heating component 100 in the household appliance has a hollow area 2 in the middle. The hollow area 2 can reduce the problem of excessive energy density in the middle of the mica heating core plate 1 to a certain extent and reduce the phenomenon of food burning in the middle.
[0004] In the process of developing this utility model, the inventors discovered at least the following problems in the prior art: the hollow area 2 in the middle of the existing mica heating core plate 1 is roughly rectangular in shape. Large local temperature gradients occur at each side of the rectangle and the included angle between adjacent sides, resulting in uneven browning of food and easy burning of food in the center. Furthermore, the rectangular hollow area is prone to stress concentration during stamping, leading to breakage of the mica heating plate. Utility Model Content
[0005] This utility model aims to solve, at least to a certain extent, one of the technical problems in the related art.
[0006] Therefore, the purpose of this utility model is to propose a mica heating core plate and heating component, which can make food brown more evenly, reduce the probability of breakage caused by stamping, and improve the processing integrity rate.
[0007] To achieve the above objectives, the first aspect of this utility model proposes a mica heating core plate, comprising a core plate body and a resistance wire, wherein the resistance wire is spirally wound on the core plate body, and a hollow area is provided in the middle of the core plate body, wherein at least a portion of the cross-section of the hollow area is an arc-shaped edge, and the arc-shaped edge bends toward the edge of the core plate body.
[0008] According to the mica heating core plate of this utility model, by providing a hollow area in the middle of the core plate body, at least a portion of the cross-section of the hollow area is an arc-shaped edge, and the arc-shaped edge bends towards the edge of the core plate body, it is not easy for heat to form dead corners or accumulation areas during the heat transfer process, avoiding the occurrence of large local temperature gradients, improving the uniformity of heat radiation, making the heat distribution more uniform, reducing the temperature deviation between the middle and the periphery of the core plate body, and the arc-shaped edge provides a smooth heat distribution transition, making the food brown more evenly, while also dispersing stress and reducing processing damage.
[0009] According to one embodiment of the present invention, the core board body includes a first half plate and a second half plate joined together, the first half plate and the second half plate are coplanar, and the inner surfaces of the first half plate and the second half plate are combined to form the hollow area.
[0010] According to one embodiment of the present invention, the inner and outer sides of the first half plate and the second half plate are provided with a plurality of first winding grooves, and the core plate body between adjacent first winding grooves forms a toothed portion, and at least a portion of the line connecting the tooth tips of the plurality of teeth is an arc-shaped edge.
[0011] According to one embodiment of the present invention, the first half plate and the second half plate are symmetrically distributed on both sides of the centerline of the core plate body.
[0012] According to one embodiment of the present invention, the arc-shaped edge is formed by connecting the tooth tips of all the teeth of the first half plate or the second half plate.
[0013] According to one embodiment of the present invention, the distance between the two arcuate sides first increases and then decreases along the first direction.
[0014] According to one embodiment of the present invention, the number of the arc-shaped edges is multiple, and the arc-shaped edges are not continuous.
[0015] According to one embodiment of the present invention, the hollowed-out area is divided into a first hollowed-out area, a second hollowed-out area, and a third hollowed-out area along a first direction. A first arc-shaped edge is formed by connecting the tooth tips of all the teeth of the first half plate or the second half plate in the first hollowed-out area. A second arc-shaped edge is formed by connecting the tooth tips of all the teeth of the first half plate or the second half plate in the second hollowed-out area. A third arc-shaped edge is formed by connecting the tooth tips of all the teeth of the first half plate or the second half plate in the third hollowed-out area.
[0016] According to one embodiment of the present invention, the distance between the two first arcuate sides gradually increases along the first direction, the distance between the two second arcuate sides shows a trend of first increasing and then decreasing along the first direction, and the distance between the two third arcuate sides gradually decreases along the first direction.
[0017] According to one embodiment of the present invention, a resistance wire is further included, which is spirally wound on the core board body.
[0018] The second aspect of this utility model provides a heating assembly, including the mica heating core plate described in the first aspect.
[0019] 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
[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:
[0021] Figure 1 This is a schematic diagram of the structure of a mica heating core plate in existing technology.
[0022] Figure 2 This is a schematic diagram of the structure of a mica heating core plate proposed in one embodiment of this utility model.
[0023] Figure 3 This is a schematic diagram of the structure of a mica heating core plate proposed in another embodiment of this utility model.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1-Mica heating core plate, 2-Hollowed area, 3-Resistance wire, 4-First winding groove, 5-Second winding groove, 6-Tooth, 11-First half plate, 12-Second half plate, 61-Tooth tip, 100-Heating component, 201-First hollowed area, 202-Second hollowed area, 203-Third hollowed area. Detailed Implementation
[0026] The embodiments of this utility model are described in detail below, examples of which 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. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.
[0027] The following is for reference. Figures 2 to 3 The present invention describes a mica heating core plate 1 according to an embodiment of the present invention.
[0028] This embodiment proposes a mica heating core plate, including a core plate body and a resistance wire 3. The resistance wire 3 is spirally wound on the core plate body. A hollow area 2 is provided in the middle of the core plate body. At least a part of the cross-section of the hollow area 2 is an arc-shaped edge, which bends towards the edge of the core plate body.
[0029] The specific type of the core board body is set according to actual needs and is not limited. For example, the core board body can be roughly rectangular in shape. The core board body is made of mica, which has excellent heat resistance and electrical insulation properties. The number of resistance wires 3 is set according to actual needs and can be single or double, and the winding direction is set according to actual needs. The proportion of the cross-sectional area of the hollow area 2 to the total area of the core board body is set according to actual needs and is not limited. The curved edge can be one or a combination of circular arcs, elliptical arcs, parabolic arcs, hyperbolic arcs, and other planar curves. The number of curved edges is set according to actual needs and is not limited. For example, the number of curved edges can be one or multiple.
[0030] According to the mica heating core plate of this utility model embodiment, by providing a hollow area in the middle of the core plate body, at least a portion of the cross-section of the hollow area is an arc-shaped edge, and the arc-shaped edge bends towards the edge of the core plate body, it is not easy for heat to form dead corners or accumulation areas during the heat transfer process, avoiding the occurrence of large local temperature gradients, improving the uniformity of heat radiation, making the heat distribution more uniform, reducing the temperature deviation between the middle and the periphery of the core plate body, and the arc-shaped edge provides a smooth heat distribution transition, making the food brown more evenly, while also dispersing stress and reducing processing damage.
[0031] Combination Figure 2 , Figure 3As shown, in some embodiments, the core board body includes a first half-plate 11 and a second half-plate 12 joined together. The first half-plate 11 and the second half-plate 12 are coplanar, and their inner surfaces combine to form a hollow area 2. The joining of the first half-plate 11 and the second half-plate 12 can meet specific size and shape requirements and facilitates installation and maintenance. The shapes of the first half-plate 11 and the second half-plate 12 are set according to actual needs. In one example, the first half-plate 11 and the second half-plate 12 are symmetrically distributed on both sides of the centerline of the core board body, resulting in a more aesthetically pleasing overall appearance.
[0032] The inner and outer surfaces of the first half-plate 11 and the second half-plate 12 are provided with a plurality of first winding grooves 4. The core plate body between adjacent first winding grooves 4 forms a toothed portion 6, and at least a portion of the line connecting the tooth tips 61 of the plurality of toothed portions 6 is an arc-shaped edge. In addition, the first half-plate 11 and the second half-plate 12 are each provided with a second winding groove 5 at one end, and each of the first half-plate 11 and the second half-plate 12 is provided with a conductive terminal at the other end. The first winding grooves 4 and the second winding grooves 5 can provide a fixed position for the resistance wire 3. Starting from a conductive terminal, the resistance wire 3 is wound into the first winding groove 4 in a second direction, spirally wound into the second winding groove 5 on one half-plate in the positive direction of the first direction, then wound into another second winding groove 5 in the second direction, spirally wound into the first winding groove 4 in the opposite direction of the first direction, and finally connected to another conductive terminal.
[0033] In some embodiments, such as Figure 2 As shown, an arc-shaped edge is formed by connecting the tooth tips 61 of all the teeth 6 of the first half-plate 11 or the second half-plate 12. The distance between the two arc-shaped edges increases first and then decreases along the first direction. In one example, both arc-shaped edges are elliptical arcs. Elliptical arcs provide a longer and more uniform heat conduction path, which helps heat to diffuse evenly from the center outward. In addition, elliptical arcs do not have sharp right-angled edges, which can better disperse stress, reduce stress concentration points, and improve the overall mechanical strength of the mica plate, especially in high-temperature environments, reducing the risk of deformation or breakage.
[0034] In some embodiments, such as Figure 3 As shown, there are multiple arc-shaped edges, and these edges are discontinuous. Multiple discontinuous arc-shaped edges can form local hotspots at different locations, providing a more flexible heat distribution method, suitable for applications requiring different heating intensities in different areas.
[0035] In one example, the hollowed-out area 2 is divided into a first hollowed-out area 201, a second hollowed-out area 202, and a third hollowed-out area 203 along a first direction. A first arc-shaped edge is formed within the first hollowed-out area 201 by connecting the tooth tips 61 of all the teeth 6 of the first half-plate 11 or the second half-plate 12. A second arc-shaped edge is formed within the second hollowed-out area 202 by connecting the tooth tips 61 of all the teeth 6 of the first half-plate 11 or the second half-plate 12. A third arc-shaped edge is formed within the third hollowed-out area 203 by connecting the tooth tips 61 of all the teeth 6 of the first half-plate 11 or the second half-plate 12. The lengths of the first, second, and third arc-shaped edges are set according to actual needs and are not specifically limited. The first, second, and third arc-shaped edges are distributed at different positions on the core board body, forming a relatively complex hollowed-out area 2, better adapting to complex heating modes and special application requirements.
[0036] like Figure 3 As shown, the distance between the two first arc-shaped sides gradually increases along the first direction, the distance between the two second arc-shaped sides initially increases and then decreases along the first direction, and the distance between the two third arc-shaped sides gradually decreases along the first direction. The distance between the two second arc-shaped sides is greater than the distance between the other two arc-shaped sides. This design enables different heating intensities in different areas. The larger distance between the two middle second arc-shaped sides prevents heat from concentrating too much in the center, while the smaller distance between the two outer arc-shaped sides allows for more concentrated heat, achieving high-intensity regional heating.
[0037] This embodiment of the invention also proposes a heating assembly, including the mica heating core plate described in the above embodiments. The heating assembly proposed in this embodiment can achieve the same or similar effects as any of the aforementioned mica heating core plate embodiments.
[0038] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0040] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0041] In the description of this utility model, the terms "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0042] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.
[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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.
[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A mica heating core plate, characterized in that, It includes a core board body and a resistance wire (3). The resistance wire (3) is spirally wound on the core board body. The core board body has a hollow area (2) in the middle. At least a part of the cross-section of the hollow area (2) is an arc edge, and the arc edge bends toward the edge of the core board body.
2. The mica heating core plate according to claim 1, characterized in that, The core board body includes a first half plate (11) and a second half plate (12) joined together. The first half plate (11) and the second half plate (12) are coplanar, and the inner surfaces of the first half plate (11) and the second half plate (12) are combined to form the hollow area (2).
3. The mica heating core plate according to claim 2, characterized in that, The inner and outer sides of the first half plate (11) and the second half plate (12) are provided with a plurality of first winding grooves (4), and the core plate body between adjacent first winding grooves (4) forms teeth (6), and at least a portion of the line connecting the tooth tips (61) of the plurality of teeth (6) is an arc edge.
4. The mica heating core plate according to claim 3, characterized in that, The first half plate (11) and the second half plate (12) are symmetrically distributed on both sides of the centerline of the core plate body.
5. The mica heating core plate according to claim 4, characterized in that, The arc-shaped edge is formed by connecting the tooth tips (61) of all the teeth (6) of the first half plate (11) or the second half plate (12).
6. The mica heating core plate according to claim 5, characterized in that, The distance between the two arc-shaped sides first increases and then decreases along the first direction.
7. The mica heating core plate according to claim 5, characterized in that, The number of arc-shaped edges is multiple, and the arc-shaped edges are not continuous.
8. The mica heating core plate according to claim 7, characterized in that, The hollowed-out area (2) is divided into a first hollowed-out area (201), a second hollowed-out area (202), and a third hollowed-out area (203) along the first direction. The first hollowed-out area (201) forms a first arc-shaped edge by connecting the tooth tips (61) of all the teeth (6) of the first half plate (11) or the second half plate (12). The second hollowed-out area (202) forms a second arc-shaped edge by connecting the tooth tips (61) of all the teeth (6) of the first half plate (11) or the second half plate (12). The third hollowed-out area (203) forms a third arc-shaped edge by connecting the tooth tips (61) of all the teeth (6) of the first half plate (11) or the second half plate (12).
9. The mica heating core plate according to claim 8, characterized in that, The distance between the two first arc-shaped sides gradually increases along the first direction, the distance between the two second arc-shaped sides shows a trend of first increasing and then decreasing along the first direction, and the distance between the two third arc-shaped sides gradually decreases along the first direction.
10. A heating assembly, characterized in that, Includes the mica heating core plate as described in any one of claims 1 to 9.