Graphene heating body and electric appliance

Abstract

The utility model discloses a graphene heating body and an electric appliance, and the graphene heating body comprises a plurality of graphene heating elements which are arranged at intervals and are used for heating after being electrified; and the limiting structure is connected with the plurality of graphene heating elements and is used for limiting the adjacent two graphene heating elements to be close to each other. According to the technical scheme of the utility model, the structural strength and bending deformation resistance of the graphene heating element can be improved, and the distance between two adjacent graphene heating elements is prevented from being reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of graphene heating, in particular to a graphene heating element and an electrical appliance. Background Art

[0002] Graphene heating elements generally include multiple graphene heating elements that can generate heat after being powered on. The greater the power density of the graphene heating element, the higher its operating temperature, the more intense the lattice vibration of the graphene material, the stronger the energy of the released far-infrared light wave, the higher the electric-thermal radiation conversion efficiency, and the higher the energy-saving efficiency of the product. Usually, the structural strength of a single graphene heating element is poor. When the length of the graphene heating element is long, it is very easy to bend and deform; when multiple long graphene heating elements are arranged at intervals, the deformation of the graphene heating element will cause the distance between two adjacent graphene heating elements to become smaller, and the heat dissipation will be uneven, which can easily cause the graphene heating element to overheat locally, burn, turn red, or even catch fire. Utility Model Content

[0003] The main purpose of the utility model is to provide a graphene heating element, aiming to improve the structural strength and anti-bending deformation ability of the graphene heating element and prevent the distance between two adjacent graphene heating elements from becoming smaller.

[0004] In order to achieve the above-mentioned object, the utility model provides a graphene heating element, comprising:

[0005] A graphene heating element, wherein a plurality of graphene heating elements are arranged at intervals, and the graphene heating element is used to generate heat after being powered on; and

[0006] A limiting structure, wherein the limiting structure is connected to the plurality of graphene heating elements and is used to limit two adjacent graphene heating elements from approaching each other.

[0007] In one embodiment, the limiting structure includes at least one partition located in the middle of the graphene heating element, the partition having a plurality of partition portions spaced apart from each other, two adjacent graphene heating elements are separated and limited by the partition portions, and at least one of the graphene heating elements is connected and fixed to the partition via a positioning structure.

[0008] In one embodiment, the positioning structure includes a first positioning portion provided on the partition member, and a second positioning portion provided on the graphene heating element, and the first positioning portion and the second positioning portion are positioned, matched, connected and fixed.

[0009] In one embodiment, the plurality of graphene heating elements are arranged at intervals along the second direction, the first positioning portion includes a first positioning hole passing through the opposite sides of the partition along the second direction, the second positioning portion includes a second positioning hole passing through the graphene heating element along the second direction, each of the graphene heating elements is provided with the second positioning hole, and the positioning structure also includes a connecting member extending along the second direction, the connecting member is engaged with the first positioning hole and the plurality of the second positioning holes to connect and fix the partition to the plurality of graphene heating elements.

[0010] In one embodiment, the graphene heating element is extended along the first direction, and the multiple graphene heating elements are arranged at intervals along the second direction. The partition is provided with multiple first card slots arranged at intervals along the second direction, and each of the first card slots passes through the opposite sides of the partition along the first direction. The multiple graphene heating elements are interspersed and clamped with the multiple first card slots one-to-one, and the portion between two adjacent first card slots forms the partition portion, and the first direction intersects with the second direction.

[0011] In one embodiment, the partition is provided with a plurality of first sockets on the same side of the third direction, the plurality of first sockets correspond one-to-one to and are connected with the plurality of first card slots, and the graphene heating element is inserted into the first card slot via the first sockets, wherein the first direction, the second direction and the third direction intersect each other.

[0012] In one embodiment, the inner wall surface of the first socket is provided with a first guiding inclined surface so that the first socket is gradually expanded toward a side away from the first card slot.

[0013] In one embodiment, at least part of the partition is provided with a weight-reducing groove.

[0014] In one embodiment, the limiting structure includes at least one elastic separator located in the middle of the graphene heating body, the elastic separator is clamped with the multiple graphene heating elements and fixed by elastic force, the elastic separator has a plurality of elastic separators arranged at intervals, and two adjacent graphene heating elements are separated and limited by the elastic separators.

[0015] In one of the embodiments, the graphene heating element further includes two electrode fixings disposed at intervals, each of the graphene heating elements is connected to the two electrode fixings, and the limiting structure is located between the two electrode fixings.

[0016] In one embodiment, the electrode fixing member is provided with a plurality of second card slots, and the plurality of second card slots are arranged in one-to-one correspondence with the plurality of graphene heating elements, and an end portion of each of the graphene heating elements is snap-fitted with the corresponding second card slot.

[0017] In one embodiment, the graphene heating element comprises:

[0018] Base material;

[0019] A graphene electric heating layer is disposed on one side surface of the substrate;

[0020] an electrode layer, disposed on a surface of the graphene electric heating layer facing away from the substrate, the electrode layer comprising a first electrode region and a second electrode region spaced apart along the first direction, the first electrode region being in contact with and electrically connected to one of the electrode fixing members, and the second electrode region being in contact with and electrically connected to the other electrode fixing member; and

[0021] The insulating layer covers the area of ​​the surface of the graphene electric heating layer on the side away from the substrate except the electrode layer.

[0022] The utility model also provides an electrical appliance, comprising the graphene heating element as described above.

[0023] The technical solution of the utility model is connected to multiple graphene heating elements through a limiting structure, so that multiple spaced graphene heating elements are connected to each other to form a bridging structure, which is beneficial to improving the overall structural strength and resistance to bending deformation of the graphene heating body. The limiting structure limits any two adjacent graphene heating elements from approaching each other, so that the position between any two adjacent graphene heating elements can be kept fixed, thereby avoiding the problem of local overheating, burning, reddening or even fire caused by the reduction of the spacing between the two adjacent graphene heating elements, thereby extending the service life of the graphene heating body and improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 This is a schematic structural diagram of an embodiment of a graphene heating element of the utility model;

[0026] Figure 2 for Figure 1 Top view of the graphene heating element in the middle;

[0027] Figure 3 for Figure 1 Side view of the graphene heating element in the middle;

[0028] Figure 4 for Figure 1 A schematic diagram of the structure of the middle partition;

[0029] Figure 5 This is a schematic structural diagram of another embodiment of the graphene heating element of the utility model;

[0030] Figure 6 It is a structural schematic diagram of an embodiment of an electrode fixing member of a graphene heating element;

[0031] Figure 7 A schematic structural diagram of a first embodiment of a graphene heating element which is a graphene heating element;

[0032] Figure 8 The figure is a schematic structural diagram of a second embodiment of a graphene heating element which is a graphene heating body.

[0033] Description of Figure Numbers:

[0034] Label name Label name 100 Graphene heating element 23b Second electrode area 10 Electrode fixing parts 24 Insulation layer 11 Ontology 25 Reinforcement layer 111 Second card slot 30a Partition 112 Second socket 31 Partition 113 Second guide slope 311 Weight reduction slot 12 Plug terminals 32 First positioning part 20 Graphene heating element 33 First card slot 21 Substrate 34 First socket 22 Graphene heating layer 35 First guide slope 23 Electrode layer 30b Elastic separators 23a First electrode region

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0039] The utility model provides a graphene heating element 100 .

[0040] Please refer to Figure 1 and Figure 5 In the embodiment of the utility model, the graphene heating element 100 includes a graphene heating element 20 and a limiting structure. The graphene heating element 20 is arranged in plurality at intervals, and the graphene heating element 20 is used to generate heat after being powered on. The limiting structure is connected to the plurality of graphene heating elements 20 and is used to limit two adjacent graphene heating elements 20 from approaching each other.

[0041] Specifically, the graphene heating element 20 can be set to a plate-like, rod-like or other special-shaped structures according to actual needs, which is not specifically limited here. A plurality of (i.e., at least two) graphene heating elements 20 are arranged at intervals along the second direction. In the second direction, a certain interval is formed between any two adjacent graphene heating elements 20, which is conducive to dissipating the heat of the graphene heating element 20, and the interval can also be used for airflow to pass through, so that the airflow flowing through can be heated. Optionally, the spacing between any adjacent graphene heating elements 20 is equal, which is conducive to achieving uniform heat dissipation. The first direction intersects with the second direction. For example, when the graphene heating element 20 is arranged in a plate-like shape, the first direction is the length direction of the graphene heating element 20, and the second direction can be the thickness direction or width direction of the graphene heating element 20. Optionally, the second direction is the thickness direction of the graphene heating element 20. In this way, when the size of the graphene heating element 100 in the second direction is constant, a large number of graphene heating elements 20 can be arranged as much as possible to improve the heating efficiency, and at the same time, a certain interval can be maintained between two adjacent graphene heating elements 20, which is conducive to heat dissipation. For another example, when the graphene heating element 20 is arranged in a rod shape, the first direction is the axial direction of the graphene heating element 20, and the second direction is the radial direction of the graphene heating element 20.

[0042] It is understandable that when the length of the graphene heating element 20 is long, the graphene heating element 20 is prone to bending and deformation, which will cause the distance between two adjacent graphene heating elements 20 to become smaller, and the heat dissipation is uneven, resulting in local overheating, burning, redness, or even fire of the graphene heating element 100. In this embodiment, the graphene heating element 100 is also provided with a limiting structure, which is connected to a plurality of graphene heating elements 20 through the limiting structure, so that a plurality of spaced graphene heating elements 20 are connected to each other to form a bridge structure, which is conducive to improving the overall structural strength and anti-bending deformation ability of the graphene heating element 100, and the limiting structure limits the two adjacent graphene heating elements 20 to approach each other, so that the position between the two adjacent graphene heating elements 20 can be kept fixed, thereby avoiding the problem of local overheating, burning, redness, or even fire caused by the reduction of the distance between the two adjacent graphene heating elements 20, thereby extending the service life of the graphene heating element 100 and improving the safety of use. There are many specific structures about the limiting structure. For example, the limiting structure may include a plurality of partitions 31, and any two adjacent graphene heating elements 20 are separated and limited by the partitions 31, so that the distance between the two adjacent graphene heating elements 20 remains fixed. Among them, the partition 31 can be a rigid structure or an elastic structure. For another example, the limiting structure may include a plurality of connecting parts, and each graphene heating element 20 is rigidly connected to one of the connecting parts to achieve limiting, so that the distance between the two adjacent graphene heating elements 20 remains fixed. Of course, other forms of limiting structures can also be used, as long as any two adjacent graphene heating elements 20 can be limited to approach each other by the limiting structure, so that the distance between any two adjacent graphene heating elements 20 remains fixed, which is not specifically limited here. In addition, the limiting structure and the graphene heating element 20 include but are not limited to one or several combinations of connection methods such as clamping, riveting, and screw connection, which are not specifically limited here.

[0043] The technical solution of the utility model is connected with multiple graphene heating elements 20 through a limiting structure, so that multiple spaced graphene heating elements 20 are connected to each other to form a bridging structure, which is beneficial to improving the overall structural strength and anti-bending deformation ability of the graphene heating body 100, and the limiting structure limits any two adjacent graphene heating elements 20 from approaching each other, so that the position between any two adjacent graphene heating elements 20 can be kept fixed, thereby avoiding the problem of local overheating, burning, redness or even fire caused by the reduction of the spacing between the two adjacent graphene heating elements 20, thereby extending the service life of the graphene heating body 100 and improving the safety of use.

[0044] like Figures 1 to 3As shown, in one embodiment, the limiting structure includes at least one partition 30a located in the middle of the graphene heating body 100, and the partition 30a has a plurality of partition portions 31 arranged at intervals, and two adjacent graphene heating elements 20 are separated and limited by the partition portions 31, wherein at least one of the graphene heating elements 20 is connected and fixed to the partition 30a by a positioning structure.

[0045] In the present embodiment, at least one partition 30a is located in the middle of the graphene heating element 20 to limit and support the middle of the graphene heating element 20, so as to effectively improve the anti-bending deformation ability of the middle of the graphene heating element 20. Among them, the number of partitions 30a can be set to one, two or more according to actual needs, and is not specifically limited here. Considering that the graphene heating element 20 is powered on to generate heat, in order to avoid short circuit between two adjacent graphene heating elements 20, the partition 30a is preferably made of insulating material, for example, mica, ceramics and other materials. In practical applications, the surface of the graphene heating element 20 is generally insulated. At this time, the partition 30a can also be made of a metal material with higher structural strength.

[0046] Wherein, the partition 30a includes a plurality of partitions 31 spaced apart in the second direction, and a connecting portion connecting the plurality of partitions 31 together. The width of the partition 31 is substantially the same as the spacing between two adjacent graphene heating elements 20, and the spacing between any two adjacent partitions 31 is used to insert a graphene heating element 20, so that any two adjacent graphene heating elements 20 are separated and limited by a partition 31. In this way, in the second direction, the middle position of the graphene heating element 20 located on the upper side thereof can be supported by the partition 31, and the two graphene heating elements 20 located on both sides thereof can be limited, so that the spacing between the two adjacent graphene heating elements 20 remains fixed, which is beneficial to prevent the middle position of the graphene heating element 20 from bending and deformation, and is beneficial to improving the overall structural strength and anti-bending deformation capability of the graphene heating body 100. At the same time, at least one graphene heating element 20 is connected and fixed to the partition 30a through a positioning structure, so that the partition 30a can be prevented from moving along the graphene heating element, thereby improving the assembly stability between the partition 30a and the graphene heating element 20. Optionally, the partition 30a is connected and fixed to multiple graphene heating elements 20 through a positioning structure to further improve the assembly stability of the partition 30a.

[0047] Please combine Figure 1 and Figure 4In one embodiment, the positioning structure includes a first positioning portion 32 provided on the partition 30a, and a second positioning portion (not shown) provided on the graphene heating element 20, wherein the first positioning portion 32 is positioned, matched and connected and fixed with the second positioning portion. During assembly, the first positioning portion 32 is positioned, matched and connected and fixed with the second positioning portion, so as to realize the rapid positioning and assembly of the partition 30a and the graphene heating element 20. Among them, there are many specific structures of the first positioning portion 32 and the second positioning portion, and the first positioning portion 32 and the second positioning portion can be connected and fixed with the help of a connecting member, or the first positioning portion 32 and the second positioning portion can also be connected and fixed by the structure constructed by themselves. For example, the first positioning portion 32 and the second positioning portion are both set as positioning holes for the connecting member to pass through, and the two positioning holes are aligned to achieve positioning, and then the first positioning portion 32 and the second positioning portion are connected and fixed by the connecting member and the positioning hole. For another example, one of the first positioning portion 32 and the second positioning portion is set as a positioning hole, and the other is set as a positioning column, and the positioning and connection are realized by plugging and matching the positioning column with the positioning hole.

[0048] In one embodiment, the plurality of graphene heating elements 20 are arranged at intervals along the second direction, the first positioning portion 32 includes a first positioning hole passing through the opposite sides of the partition 30a along the second direction, the second positioning portion includes a second positioning hole passing through the graphene heating element 20 along the second direction, each of the graphene heating elements 20 is provided with the second positioning hole, and the positioning structure also includes a connecting member (not shown) extending along the second direction, the connecting member is engaged with the first positioning hole and the plurality of the second positioning holes to connect and fix the partition 30a to the plurality of graphene heating elements 20.

[0049] In this embodiment, the first positioning hole penetrates the opposite sides of the partition 30a along the second direction, so that each partition 31 of the partition 30a is formed with a through positioning hole. When the partition 30a and the plurality of graphene heating elements 20 are assembled in place, the positioning hole on each partition 31 is aligned with and connected to the second positioning hole on the adjacent graphene heating element 20, and then the connector is inserted into the first positioning hole and the plurality of second positioning holes along the second direction, so that the partition 30a can be connected and fixed to the plurality of graphene heating elements 20 at the same time through a connector, which is simple and convenient to assemble, and the connection is stable and reliable, and the partition 30a can be effectively prevented from moving on each graphene heating element 20. Among them, the connector includes but is not limited to screws, bolts, rivets, pins, etc. Optionally, the partition 30a is made of ceramic, which has high structural strength, excellent high temperature resistance and insulation performance, and is also convenient for forming the first positioning hole on the partition 30a.

[0050] Please refer to Figure 1, Figure 3 and Figure 4 In one embodiment, the graphene heating element 20 is extended along the first direction, and a plurality of the graphene heating elements 20 are arranged at intervals along the second direction. The partition 30a is provided with a plurality of first card slots 33 arranged at intervals along the second direction, and each of the first card slots 33 passes through the opposite sides of the partition 30a along the first direction. The plurality of graphene heating elements 20 are interspersed and clamped with the plurality of the first card slots 33 one by one, and the portion between two adjacent first card slots 33 forms the partition portion 31, and the first direction intersects with the second direction.

[0051] In this embodiment, by providing the first slots 33 in the partition 30a, the number of the first slots 33 is the same as the number of the graphene heating elements 20. When assembling, the graphene heating element 20 is passed through the first slots 33 along the first direction, and the first slots 33 and the graphene heating element 20 are engaged to form a tight fit, so that the graphene heating element 20 can be clamped by the first slots 33. In this way, the partition 30a can be engaged with multiple graphene heating elements 20 at the same time. The portion between two adjacent first slots 33 forms a partition 31, so that the two adjacent graphene heating elements 20 can be separated and limited, so that the distance between the two adjacent graphene heating elements 20 remains fixed. Among them, the peripheral wall of the first slot 33 can be a continuous closed annular structure, or a non-closed structure with a gap, which is not specifically limited here.

[0052] It is understandable that when the peripheral wall of the first slot 33 is enclosed to form a closed loop structure, when installing the partition 30a, it is necessary to first remove one of the electrode fixing members 10, insert the free end of the graphene heating element 20 into the first slot 33 of the partition 30a along the first direction, and then connect and fix the electrode fixing member 10 with the free end of the graphene heating element 20. When disassembling the partition 30a, it is also necessary to first remove one of the electrode fixing members 10, then remove the partition 30a from the graphene heating element 20 along the first direction, and then assemble the electrode fixing member 10. In this way, the installation and disassembly process of the partition 30a is relatively cumbersome, which is not conducive to the replacement of the partition 30a.

[0053] In order to improve the convenience of installation and removal of the partition 30a and the plurality of graphene heating elements 20, as shown in FIG. Figure 3 and Figure 4 As shown, in one embodiment, the partition 30a is provided with a plurality of first sockets 34 on the same side of the third direction, and the plurality of first sockets 34 correspond one-to-one to and are connected with the plurality of first card slots 33, and the graphene heating element 20 is inserted into the first card slot 33 via the first sockets 34, wherein the first direction, the second direction and the third direction intersect each other.

[0054] In this embodiment, the graphene heating element 20 is arranged in a plate shape, the first direction is the length direction of the graphene heating element 20, the second direction is the thickness direction of the graphene heating element 20, and the third direction is the width direction of the graphene heating element 20. The partition 30a is provided with a plurality of first sockets 34 on the same side of the third direction, and the plurality of first sockets 34 correspond to and communicate with the plurality of first slots 33 one by one. In this way, when assembling the partition 30a, it is only necessary to align the portion of the partition 30a provided with the first sockets 34 with the side edge of the graphene heating element 20, and then move the partition 30a along the third direction toward one side of the graphene heating element 20 until the graphene heating element 20 is completely inserted into the corresponding first slot 33 via the first sockets 34, so that the partition 30a can be simultaneously connected with the plurality of graphene heating elements 20. When removing the partition 30a, a force in the third direction is directly applied to the partition 30a to separate the partition 30a from the plurality of graphene heating elements 20 at the same time. The installation and removal process of the partition 30a is simple and convenient, and does not involve the removal and installation of the electrode fixing member 10. When the partition 30a is damaged, the partition 30a can be easily replaced.

[0055] like Figure 3 and Figure 4 As shown, in one embodiment, the inner wall surface of the first slot 33 is provided with a first guiding inclined surface 35 so that the first insertion opening 34 is gradually expanded toward a side away from the first slot 33 .

[0056] In this embodiment, the first guide bevel 35 can guide the process of inserting the side edge of the graphene heating element 20 from the first socket 34 to the first slot 33, so as to ensure that the graphene heating element 20 can be smoothly inserted into the first slot 33, thereby improving the convenience and efficiency of assembly. Optionally, first guide bevels 35 are respectively provided on both sides of the width direction of the first slot 33, and a trumpet-shaped guide groove is formed between the two first guide bevels 35, and the guide groove is gradually expanded from the first slot 33 toward the first socket 34, so as to play a better guiding role.

[0057] Please refer to Figure 3 and Figure 4 In one embodiment, at least part of the partitions 31 is provided with a weight-reducing groove 311. Specifically, a weight-reducing groove 311 may be provided on each partition 31, or a weight-reducing groove 311 may be provided on part of the partitions 31.

[0058] In the present embodiment, by providing a weight-reducing groove 311 in the partition 31, the weight of a single partition 31 and the weight of the entire partition 30a can be reduced, and the graphene heating element 20 can be prevented from being subjected to excessive force and bending deformation due to the excessive weight of the partition 30a. And by providing the weight-reducing groove 311, it is also possible to save materials and reduce costs. Optionally, a weight-reducing groove 311 is provided on each partition 31, which can greatly reduce the weight of the partition 30a, and make the overall weight distribution of the partition 30a more uniform, so that multiple graphene heating elements 20 can be uniformly stressed in the second direction. For example, in the present embodiment, the weight-reducing groove 311 is a rectangular groove extending along the third direction, and the weight-reducing groove 311 runs through both sides of the partition 30a along the first direction, and one end of the weight-reducing groove 311 runs through the side of the partition 30a provided with the first socket 34, so that the weight-reducing groove 311 is open on three sides.

[0059] like Figure 5 As shown, in another embodiment, the limiting structure includes at least one elastic separator 30b located in the middle of the graphene heating body 100, and the elastic separator 30b is clamped with the multiple graphene heating elements 20 and fixed by elastic force, and the elastic separator 30b has a plurality of elastic separators arranged at intervals, and two adjacent graphene heating elements 20 are separated and limited by the elastic separators.

[0060] In the present embodiment, the limiting structure includes at least one elastic separator 30b located in the middle of the graphene heating element 100, and the elastic separator 30b can limit and support the middle of the graphene heating element 20, so as to effectively improve the anti-bending deformation ability of the middle of the graphene heating element 20. Among them, the number of elastic separators 30b can be set to one, two or more according to actual needs, and is not specifically limited here. During assembly, the elastic separator 30b is clamped with a plurality of graphene heating elements 20, and the elastic separator 30b can be clamped and fixed with the plurality of graphene heating elements 20 by the elastic force of the elastic separator 30b itself, so as to prevent the elastic separator 30b from moving on the graphene heating element 20. The elastic separator 30b has a plurality of elastic separators arranged at intervals along the second direction. Any two adjacent graphene heating elements 20 are separated and limited by the elastic separators, so that the spacing between the two adjacent graphene heating elements 20 remains fixed, which is beneficial to prevent the middle position of the graphene heating element 20 from bending and deformation, and is beneficial to improving the overall structural strength and anti-bending deformation ability of the graphene heating element 100. For example, the elastic separator 30b can be a spring extending in a spiral along the second direction, and a slot that is engaged with the side edge of the graphene heating element 20 can be formed between two axially adjacent spiral ribs of the spring, and one or more spiral ribs between the two slots form the elastic separator.

[0061] It can be understood that, in some embodiments, the limiting structure may include a partition 30a and an elastic partition 30b at the same time, and the structural strength and anti-bending deformation ability of the graphene heating element 100 can be improved through the cooperation of the partition 30a and the elastic partition 30b.

[0062] In addition, in order to make the overall force of the graphene heating element 100 more uniform, the partition 30a (or elastic partition 30b) can be arranged with the length bisector of the graphene heating element 100 as the reference line. Among them, the length bisector of the graphene heating element 100 can be understood as: the straight line formed by connecting the midpoint position of each graphene heating element 20 along the length direction is the length bisector of the graphene heating element 100, that is, each graphene heating element 20 can be divided into two sections along the length direction through the length bisector. The number of partitions 30a (or elastic partitions 30b) is different according to whether it is an even number or an odd number, and the following is an introduction to the two situations respectively.

[0063] like Figure 2 As shown, in one embodiment, the partitions 30a (or elastic partitions 30b) are arranged 2N apart along the first direction, and the 2N partitions 30a (or elastic partitions 30b) are symmetrically arranged on both sides of the length bisector of the graphene heating element 100, wherein N is an integer greater than or equal to 1.

[0064] In the present embodiment, 2N (i.e., an even number) of partitions 30a (or elastic partitions 30b) are arranged at intervals along the first direction, and specifically can be two, four, six or other even numbers, etc. At this time, the 2N partitions 30a (or elastic partitions 30b) can be symmetrically arranged on both sides of the length bisector of the graphene heating element 100, so that the force on the graphene heating element 100 along the length direction is more uniform, and the ability to resist bending deformation can be further improved, and the graphene heating element 100 is symmetrical along the length direction, which is conducive to improving the structural strength. For example, in the present embodiment, there are two partitions 30a (or elastic partitions 30b), and the two partitions 30a (or elastic partitions 30b) are symmetrically arranged on both sides of the length bisector of the graphene heating element 100, that is, the distances between the two partitions 30a (or elastic partitions 30b) and the length bisector are equal.

[0065] In some other embodiments, the partitions 30a (or elastic partitions 30b) are arranged 2N+1 apart along the first direction, one of the partitions 30a (or elastic partitions 30b) is arranged at the length bisector of the graphene heater 100, and the remaining 2N partitions 30a (or elastic partitions 30b) are symmetrically arranged on both sides of the length bisector of the graphene heater 100, wherein N is an integer greater than or equal to zero.

[0066] In the present embodiment, the spacers 30a (or elastic spacers 30b) are arranged at intervals of 2N+1 (i.e., an odd number) along the first direction, which may be one, three, five or other odd numbers. At this time, one of the spacers 30a (or elastic spacers 30b) may be arranged at the length bisector of the graphene heating element 100, and the remaining 2N spacers 30a (or elastic spacers 30b) may be symmetrically arranged on both sides of the length bisector of the graphene heating element 100, so that the force on the graphene heating element 100 along the length direction is more uniform, and the ability to resist bending deformation can be further improved, and the graphene heating element 100 may be symmetrical along the length direction, which is beneficial to improving the structural strength. For example, when there is one spacer 30a (or elastic spacer 30b), the spacer 30a (or elastic spacer 30b) may be arranged at the length bisector of the graphene heating element 100. For another example, when three partitions 30a (or elastic partitions 30b) are provided, one of the partitions 30a (or elastic partitions 30b) can be arranged at the length bisector of the graphene heating element 100, and the remaining two partitions 30a (or elastic partitions 30b) can be symmetrically arranged on both sides of the length bisector of the graphene heating element 100, that is, the distances between the remaining two partitions 30a (or elastic partitions 30b) and the length bisector are equal.

[0067] On the basis of the above embodiments, in one embodiment, the graphene heating body 100 further includes two electrode fixing members 10 disposed at intervals, each of the graphene heating elements 20 is connected to the two electrode fixing members 10 , and the limiting structure is located between the two electrode fixing members 10 .

[0068] Among them, the electrode fixing part 10 is made of a conductive material, for example, it can be made of copper, aluminum or an alloy material with good conductive performance. The electrode fixing part 10 is connected to the graphene heating element 20 and is electrically conductive. The electrode fixing part 10 and the graphene heating element 20 are connected and fixed by means of, but not limited to, clamping, welding, riveting or screw connection, which are not specifically limited here. Among them, there are many types of setting positions for the electrode fixing part 10. For example, two electrode fixing parts 10 can be connected to the two ends of the graphene heating element 20 respectively; or, one of the electrode fixing parts 10 can be connected to the middle of the graphene heating element 20, and the other electrode fixing part 10 can be connected to the end of the graphene heating element 20. The area of ​​the graphene heating element 20 between the two electrode fixing parts 10 is a conductive heating area.

[0069] For example, Figure 1 As shown, the graphene heating element 20 is extended along the first direction, and the two ends of each graphene heating element 20 are connected to the two electrode fixing members 10 one by one, so that the two electrode fixing members 10 can cooperate to provide structural support for the graphene heating element 20, and the graphene heating element 20 can also be electrically connected to the power supply. When in use, one of the electrode fixing members 10 is electrically connected to the positive pole of the power supply, and the other electrode fixing member 10 is electrically connected to the negative pole of the power supply, so that the graphene heating element 20 can be connected to the power supply circuit to enable the graphene heating element 20 to be powered on and heated. The cooperation of the two electrode fixing members 10 can simultaneously provide structural support for multiple graphene heating elements 20, and multiple parallel graphene heating elements 20 can also be electrically connected to the power supply. Multiple graphene heating elements 20 are connected in parallel between two electrode fixing parts 10, which can improve the overall heating efficiency of the graphene heating body 100. When some of the graphene heating elements 20 are damaged, it will not affect the normal operation of other graphene heating elements 20, thereby extending the service life of the graphene heating body 100.

[0070] In order to facilitate the installation and removal of the electrode fixing member 10 and multiple graphene heating elements 20 at the same time, Figure 5 and Figure 6 As shown, in one embodiment, the electrode fixing member 10 is provided with a plurality of second card slots 111 , and the plurality of second card slots 111 are arranged in one-to-one correspondence with the plurality of graphene heating elements 20 , and an end portion of each of the graphene heating elements 20 is snap-fitted with the corresponding second card slot 111 .

[0071] In this embodiment, the end of the graphene heating element 20 is engaged with the second slot 111 of the electrode fixing member 10, which is simple and convenient to assemble and can improve assembly efficiency. Optionally, the end of the graphene heating element 20 and the electrode fixing member 10 can also be connected and fixed by riveting, screw connection, etc. to further improve assembly reliability.

[0072] There are many specific structures of the electrode fixing member 10, such as Figure 6 As shown, in one embodiment, the electrode fixing member 10 may include a main body 11 and a plug-in terminal 12 connected to the main body 11, the main body 11 is provided with a plurality of second card slots 111 spaced apart along the second direction, and the plug-in terminal 12 is used to be plugged into and matched with a power source and to be electrically connected to the positive or negative pole of the power source.

[0073] In order to further improve the assembly convenience of the graphene heating element 20 and the electrode fixing part 10, each electrode fixing part 10 is provided with a second socket 112 connected to the second card slot 111 on the side facing the other electrode fixing part 10, and the inner wall surface of the second socket 112 is provided with a second guide slope 113 so that the second socket 112 is gradually expanded toward the side away from the second card slot 111.

[0074] In this embodiment, the second guide bevel 113 can guide the process of inserting the end of the graphene heating element 20 from the second socket 112 to the second slot 111 to ensure that it can be smoothly inserted into the second slot 111, thereby improving the convenience and efficiency of assembly. Optionally, the second guide bevel 113 is provided on both sides of the width direction of the second slot 111, and a trumpet-shaped guide groove is formed between the two second guide bevels 113, and the guide groove is gradually expanded from the second slot 111 to the second socket 112, so as to play a better guiding role. Optionally, in the width direction of the graphene heating element 20, the second slot 111 has an opening that runs through both sides of the electrode fixing member 10, and the openings on both sides are connected to the second socket 112 to form a "U"-shaped opening, so that the graphene heating element 20 with a larger width can be plugged in more conveniently.

[0075] In other embodiments, the electrode fixing part 10 may also be an elastic part having a plurality of second slots 111, and the end of the graphene heating element 20 is engaged with the second slots 111 and is clamped and fixed by the elastic force of the elastic part. In this way, the elastic force applied by the elastic part can play a fixing and limiting role, which can further improve the assembly reliability. For example, the electrode fixing part 10 can use a spring that is spirally extended along the second direction, and the second slot 111 can be formed between two axially adjacent spiral ribs of the spring. In this embodiment, the structure of the electrode fixing part 10 is the same as that of the electrode fixing part 10. Figure 5 The structure of the elastic separator 30b in is similar.

[0076] Based on the above embodiments, Figure 7 As shown, in one embodiment, the graphene heating element 20 includes a substrate 21, a graphene electric heating layer 22, an electrode layer 23 and an insulating layer 24. The graphene electric heating layer 22 is provided on one side surface of the substrate 21; the electrode layer 23 is provided on one side surface of the graphene electric heating layer 22 away from the substrate 21, and the electrode layer 23 includes a first electrode region 23a and a second electrode region 23b spaced apart along the first direction, the first electrode region 23a is in contact with and electrically connected to one of the electrode fixing members 10, and the second electrode region 23b is in contact with and electrically connected to the other electrode fixing member 10; the insulating layer 24 covers the area of ​​the graphene electric heating layer 22 on the side surface away from the substrate 21 except the electrode layer 23.

[0077] Specifically, the substrate 21 is used to form the main support structure of the graphene heating element 20. It is understandable that the temperature of the graphene heating element 20 is high after being powered on and heated, so the substrate 21 is generally a high temperature resistant substrate 21 made of high temperature resistant material. For example, the substrate 21 can be made of mica, ceramic, glass and other materials. Optionally, the substrate 21 can be made of mica board, which has excellent high temperature resistance and insulation performance, and is cheap, which is conducive to reducing costs. The thickness of the mica board used as the substrate 21 should not be too thick. Optionally, a mica board with a thickness of not more than 0.5mm is used as the substrate 21, which can effectively prevent the mica board from being cracked by heat due to being too thick, so as to ensure the structural stability of the graphene heating element 20. Among them, the shape of the substrate 21 can be set to a flat plate, a curved plate, a rod, a spiral or other special-shaped structures according to actual needs, which is not specifically limited here. Optionally, the substrate 21 is set to a flat plate, with a simple structure, which is convenient for coating the graphene electric heating layer 22 over a large area.

[0078] The graphene electric heating layer 22 is a graphene film covering structure of a large-area continuous two-dimensional structure formed by graphene through a specific technology. Utilizing the high conductivity and rapid heating characteristics of graphene composite materials, when the electrodes at both ends of the graphite electric heating layer are energized, the carbon atom groups in the graphene electric heating layer 22 rub and collide with each other to generate heat energy. The greater the power density of the graphene heating element 20, the higher its operating temperature, the more violent the lattice vibration of the graphene material, the stronger the far-infrared light wave energy released, the higher the electric-thermal radiation conversion efficiency, and the higher the energy-saving efficiency of the product. The graphene electric heating layer 22 can be attached to the surface of the substrate 21 by printing, inkjet printing and other processes. Optionally, the graphene electric heating layer 22 is a graphene electric heating coating coated on the surface of the substrate 21.

[0079] The electrode layer 23 is generally made of a conductive material with good conductivity. For example, the electrode layer 23 can be made of silver, copper, aluminum, or conductive paste. The electrode layer 23 can be attached to the surface of the graphene electric heating layer 22 by printing, patch and other processes. Optionally, the electrode layer 23 is an electrode coating coated on the surface of the graphene electric heating layer 22. In this way, the electrode layer 23 and the graphene electric heating coating can be closely connected to form a surface-to-surface contact, which can not only simplify the manufacturing process, but also ensure a stable and reliable electrical connection between the two. The electrode layer 23 includes a first electrode region 23a and a second electrode region 23b arranged at intervals, wherein the first electrode region 23a is used to contact and electrically conduct with one of the electrode fixing members 10, and the second electrode region 23b is used to contact and electrically conduct with the other electrode fixing member 10, so that the graphene electric heating layer 22 can be electrically connected to the power supply to form a current loop.

[0080] The insulating layer 24 can be made of a high temperature resistant insulating material, for example, polyvinyl chloride, polytetrafluoroethylene, phenolic resin, silicone resin, etc. The insulating layer 24 can be an insulating film attached to the surface of the graphene electric heating layer 22 or an insulating coating coated on the surface of the graphene electric heating layer 22. The insulating layer 24 covers the area of ​​the surface of the graphene electric heating layer 22 on the side away from the substrate 21 except the electrode layer 23, so as to play an insulating protection role, ensure the surface insulation of the graphene heating element 20, thereby avoiding the risk of leakage, and ensuring the safety of the use of the graphene heating element 20.

[0081] It is understandable that the substrate 21 is usually not too thick. If the substrate 21 is too thick, it is easy to delaminate and crack when heated; however, if the thickness of the substrate 21 is too thin, the graphene heating element 20 will have poor anti-deformation ability. In order to further improve the anti-deformation ability of the graphene heating element 20, please refer to Figure 8 In some embodiments, the graphene heating element 20 further includes a reinforcing layer 25 , and the reinforcing layer 25 is disposed on a side of the substrate 21 away from the graphene electric heating layer 22 , and / or on a side of the insulating layer 24 away from the graphene electric heating layer 22 .

[0082] In this embodiment, without increasing the thickness of the substrate 21 itself, the structure of the substrate 21 and the entire graphene heating element 20 can be strengthened by the reinforcement layer 25, so that the graphene heating element 20 is not easy to bend and deform. The reinforcement layer 25 and the substrate 21 are connected and fixed by means of bonding, riveting, screw connection, etc., including but not limited to bonding, riveting, screw connection, etc. Among them, the reinforcement layer 25 is generally made of a material that is resistant to high temperature and has high structural strength, such as mica, ceramics, sheet metal, etc. By providing the reinforcement layer 25 on the graphene heating element 20, even if the length of the graphene heating element 20 is long, it is not easy to bend and deform. When a plurality of longer graphene heating elements 20 are arranged at intervals along the second direction, the spacing between two adjacent graphene heating elements 20 can be kept fixed, which is conducive to uniform heat dissipation, avoiding the entire graphene heating element 100 from turning red or even catching fire due to the smaller spacing between two adjacent graphene elements, and can extend the service life of the graphene heating element 100 and improve the safety of use.

[0083] The utility model also provides an electrical appliance, which includes a graphene heating element 100. The specific structure of the graphene heating element 100 refers to the above embodiment. Since the electrical appliance adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. Among them, the electrical appliance includes but is not limited to a heater, a hair dryer or other electrical appliances with heating function.

[0084] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A graphene heating element, characterized in that: include: A graphene heating element, wherein a plurality of graphene heating elements are arranged at intervals, and the graphene heating element is used to generate heat after being powered on; as well as A limiting structure, wherein the limiting structure is connected to the plurality of graphene heating elements and is used to limit two adjacent graphene heating elements from approaching each other.

2. The graphene heating element according to claim 1, characterized in that: The limiting structure includes at least one partition located in the middle of the graphene heating element, the partition having a plurality of partition portions spaced apart from each other, two adjacent graphene heating elements are separated and limited by the partition portions, and at least one of the graphene heating elements is connected and fixed to the partition via a positioning structure.

3. The graphene heating element according to claim 2, characterized in that: The positioning structure includes a first positioning portion provided on the partition member, and a second positioning portion provided on the graphene heating element, and the first positioning portion and the second positioning portion are positioned, matched, connected and fixed.

4. The graphene heating element according to claim 3, characterized in that: The multiple graphene heating elements are arranged at intervals along the second direction, the first positioning portion includes a first positioning hole penetrating the opposite sides of the partition along the second direction, the second positioning portion includes a second positioning hole penetrating the graphene heating element along the second direction, each of the graphene heating elements is provided with the second positioning hole, the positioning structure also includes a connecting member extending along the second direction, the connecting member is engaged with the first positioning hole and the multiple second positioning holes to connect and fix the partition to the multiple graphene heating elements.

5. The graphene heating element according to claim 2, characterized in that: The graphene heating element is extended along the first direction, and the multiple graphene heating elements are arranged at intervals along the second direction. The partition is provided with multiple first card slots arranged at intervals along the second direction, and each of the first card slots passes through the opposite sides of the partition along the first direction. The multiple graphene heating elements are interspersed and clamped with the multiple first card slots one-to-one, and the portion between two adjacent first card slots forms the partition portion, and the first direction intersects with the second direction.

6. The graphene heating element according to claim 5, characterized in that: The partition is provided with a plurality of first sockets on the same side of the third direction, the plurality of first sockets correspond one-to-one to and are connected with the plurality of first card slots, the graphene heating element is inserted into the first card slot via the first sockets, wherein the first direction, the second direction and the third direction intersect each other.

7. The graphene heating element according to claim 6, characterized in that: The inner wall surface of the first socket is provided with a first guiding inclined surface so that the first socket is gradually expanded toward a side away from the first card slot.

8. The graphene heating element according to claim 2, characterized in that: At least part of the partition is provided with a weight-reducing groove.

9. The graphene heating element according to claim 1, characterized in that: The limiting structure includes at least one elastic separator located in the middle of the graphene heating body, the elastic separator is clamped with the multiple graphene heating elements and fixed by elastic force, the elastic separator has a plurality of elastic separators arranged at intervals, and two adjacent graphene heating elements are separated and limited by the elastic separators.

10. The graphene heating element according to any one of claims 1 to 9, characterized in that: It also includes two electrode fixing parts which are arranged at intervals, each of the graphene heating elements is connected to the two electrode fixing parts, and the limiting structure is located between the two electrode fixing parts.

11. The graphene heating element according to claim 10, characterized in that: The electrode fixing member is provided with a plurality of second card slots, and the plurality of second card slots are arranged in one-to-one correspondence with the plurality of graphene heating elements, and an end portion of each of the graphene heating elements is engaged with the corresponding second card slot.

12. The graphene heating element according to claim 10, characterized in that: The graphene heating element comprises: Base material; A graphene electric heating layer is disposed on one side surface of the substrate; an electrode layer, disposed on a surface of the graphene electric heating layer facing away from the substrate, the electrode layer comprising a first electrode region and a second electrode region spaced apart along a first direction, the first electrode region being in contact with and electrically connected to one of the electrode fixing members, and the second electrode region being in contact with and electrically connected to the other electrode fixing member; and The insulating layer covers the area of ​​the surface of the graphene electric heating layer on the side away from the substrate except the electrode layer.

13. An electrical appliance, characterized in that: Comprising the graphene heating element as described in any one of claims 1 to 12.

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