Composite nanometer heating film

Abstract

The utility model discloses a composite nanometer heating film which comprises a nanometer heating film body, at least one group of electrodes is arranged on the nanometer heating film body, each group of electrodes at least comprises two electrode strips, the nanometer heating film body is packaged in a mica outer layer, and the mica outer layer is tightly attached to the surface of the nanometer heating film body. According to the utility model, the nanometer heating film body is packaged in the mica outer layer, and the mica outer layer can be coated outside the nanometer heating film body by adopting mica slurry, or mica paper with an attaching layer is attached outside the nanometer heating film body, so that the mica outer layer is attached to the nanometer heating film body, and the thermal conductivity and the insulativity of the nanometer heating film body are ensured.

Description

Technical Field

[0001] This utility model relates to the field of electric heating element technology, and in particular to a composite nano heating film. Background Technology

[0002] Nanoscale heating films are an emerging product, typically with a thickness of less than 150 micrometers. The materials used in nanoscale heating films include polyimide, carbon nanotubes, graphene, and other additives. By adjusting the proportions of these materials, the sheet resistance of the final film can be altered, thereby achieving different heating temperatures.

[0003] However, because the nano heating film is thin and soft, it is difficult to fix and is prone to wrinkling. In addition, the surface of the nano heating film is conductive, making it difficult to solve the problems of thermal conductivity and insulation at the same time, which affects its application and promotion. Utility Model Content

[0004] The purpose of this invention is to provide a composite nano-heating film with a reasonable structure, convenient installation, good surface insulation, and high temperature resistance.

[0005] The purpose of this utility model is achieved as follows:

[0006] A composite nano-heating film includes a nano-heating film body, on which at least one set of electrodes is provided, each set of electrodes including at least two electrode strips, and the nano-heating film body is encapsulated in a mica outer layer, with the mica outer layer closely attached to the surface of the nano-heating film body.

[0007] The objective of this utility model can also be achieved by the following technical measures:

[0008] As a more specific embodiment, a portion of the electrode strip is exposed outside the mica outer layer, and the edge of the nano-heating film body is spaced a certain distance from the edge of the mica outer layer.

[0009] As a further embodiment, the outer layer of the mica has openings corresponding to the area through which the electrode strip passes, so as to expose the electrode; the exposed portion of the electrode strip is located on the surface of the nano-heating film body, or the exposed portion of the electrode strip extends beyond the edge of the nano-heating film body.

[0010] As a further embodiment, one end of the electrode strip extends beyond the edge of the nano-heating film body and beyond the outer layer of the mica.

[0011] As a further embodiment, the nano-heating film body has at least one set of opposite sides with electrode strips respectively, the electrode strips extending along the edge of the nano-heating film body, and the two electrode strips on the opposite sides form a set of electrodes.

[0012] As a further embodiment, the nano-heating film body is in the shape of a parallelogram; or, the nano-heating film body is in the shape of a ring, with its inner and outer ring edges forming a set of opposite edges.

[0013] As a further embodiment, the thickness of the nano-heating film body is 5 micrometers to 150 micrometers, and it contains polyimide, carbon nanotubes and graphene.

[0014] As a further embodiment, the outer layer of the mica is plate-shaped or cylindrical, and the cylindrical shape is either closed-loop or open-loop, with a heating cavity formed within the cylindrical shape.

[0015] As a further embodiment, the upper and lower sides of the nano-heating film body are coated with mica slurry, and the mica slurry is hot-pressed and dried to form the mica outer layer, the thickness of which is 0.2 mm to 2 mm.

[0016] As a further alternative, at least one sheet of mica paper is attached to the upper and lower sides of the nano-heating film body, and the mica papers attached to the upper and lower sides are combined to form the mica outer layer, the thickness of which is 0.2 mm to 2 mm.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) This utility model encapsulates the nano heating film body inside the mica outer layer. The mica outer layer can be made by coating the nano heating film body with mica slurry or by attaching mica paper with an adhesive layer to the nano heating film body, so that the mica outer layer is bonded to the nano heating film body, ensuring its thermal conductivity and insulation.

[0019] (2) The mica outer layer of this utility model provides a certain support for the nano heating film body, has a certain rigidity, and is easy to install. Attached Figure Description

[0020] Figure 1 This is an exploded structural diagram of the first embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure in the first embodiment of the present invention, in front view (perspective view).

[0022] Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure.

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point C.

[0024] Figure 5 for Figure 2 Schematic diagram of the BB cross-section structure.

[0025] Figure 6 for Figure 5 Enlarged structural diagram at point D.

[0026] Figure 7 for Figure 3 A schematic diagram of another embodiment of the medium-nano heating film.

[0027] Figure 8 for Figure 7 Enlarged structural diagram at point E in the middle.

[0028] Figure 9 This is a cross-sectional structural diagram of the second embodiment of the present invention.

[0029] Figure 10 for Figure 9 Enlarged structural diagram at point F.

[0030] Figure 11 This is a schematic diagram of the structure in the main view (perspective view) of the third embodiment of this utility model.

[0031] Figure 12 This is a schematic diagram of the main view (perspective view) structure of the fourth embodiment of this utility model.

[0032] Figure 13 This is a schematic diagram of the structure in the main view (perspective view) of the fifth embodiment of this utility model.

[0033] Figure 14 This is a three-dimensional (perspective view) structural schematic diagram of the sixth embodiment of this utility model.

[0034] Figure 15 for Figure 14 A structural diagram after removing perspective lines.

[0035] Figure 16 for Figure 15 Schematic diagram of the cross-sectional structure of GG.

[0036] Figure 17 for Figure 16 Schematic diagram of the structure at point H.

[0037] Figure 18 This is a schematic diagram of the nano-heating film structure in the sixth embodiment of this utility model.

[0038] Figure 19 This is a schematic diagram of the main view (perspective view) structure of the seventh embodiment of this utility model.

[0039] Figure 20 for Figure 19 Schematic diagram of the II section structure. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0041] Example 1, see Figures 1-6 As shown, a composite nano-heating film includes a nano-heating film body 2, a set of electrodes on the nano-heating film body 2, the set of electrodes including two electrode strips 3, the nano-heating film body 2 is encapsulated in a mica outer layer 1, and the mica outer layer 1 is in close contact with the surface of the nano-heating film body 2.

[0042] The mica outer layer 1 is plate-shaped, a portion of the electrode strip 3 is exposed outside the mica outer layer 1, and the edge of the nano heating film body 2 is separated from the edge of the mica outer layer 1 by a certain distance.

[0043] The outer mica layer 1 has openings 11 corresponding to the area traversed by the electrode strip 3, so that the electrode is exposed.

[0044] In this embodiment, the thickness of the nano-heating film body 2 is 5 micrometers to 150 micrometers, and it contains polyimide, carbon nanotubes, and graphene. The nano-heating film body 2 is rectangular, and electrode strips 3 are respectively provided on a set of opposite sides of the nano-heating film body 2. The electrode strips 3 extend along the edge of the nano-heating film body 2, and the two electrode strips 3 on the set of opposite sides form a set of electrodes.

[0045] The upper and lower sides of the nano-heating film body 2 are coated with mica slurry. After the mica slurry is hot-pressed and dried, it forms the mica outer layer 1. The thickness of the mica outer layer 1 is 0.2 mm to 2 mm.

[0046] In this embodiment, the electrode strip 3 is a copper foil with a conductive adhesive layer on the back. The copper foil is bonded to the nano-heating film body 2 through the conductive adhesive layer. As a further solution, to improve the bonding effect of the electrode strip 3, a silver paste layer 4 is first deposited (which can be vapor-deposited) at the edge of the nano-heating film body 2, and the copper foil is bonded to the silver paste layer 4 through the conductive adhesive layer. Figure 7 and Figure 8 As shown.

[0047] The processing principle is as follows: First, a lower layer of mica slurry is coated, then the nano-heating film body 2 is placed on top, and then an upper layer of mica slurry is coated again. A shim needs to be placed at the position corresponding to the opening 11 of the electrode strip 3 (if coating is done on a tooling, protrusions can be set at the corresponding opening 11 positions on the tooling). The mica slurry and the nano-heating film body 2 are dried together to a certain extent. Further, the mica slurry on both the upper and lower sides is pressurized and heated for a certain time to complete the composite process. During the heating and pressurization process, multiple composite nano-heating films can be stacked and pressurized together for heating.

[0048] Example 2 differs from Example 1 in that: See [link to example 1] Figure 9 and Figure 10As shown, at least one mica paper P is attached to the upper and lower sides of the nano heating film body 2, and the mica papers P attached to the upper and lower sides are combined to form the mica outer layer 1. The thickness of the mica outer layer 1 is 0.2 mm to 2 mm.

[0049] Example 3 differs from Example 1 in that: See Figure 11 As shown, the exposed portion of the electrode strip 3 extends beyond the edge of the nano-heating film body 2.

[0050] Example 4 differs from Example 3 in that: See [link to example]. Figure 12 As shown, the outer ends of the two electrode strips 3 are close to each other.

[0051] Example 5 differs from Example 3 in that: See [link to example 3] Figure 13 As shown, the exposed portion of the electrode strip 3 also extends beyond the edge of the mica outer layer 1.

[0052] Example 6 differs from Example 1 in that: See [link to example 1] Figures 14 to 18 As shown, the mica outer layer 1 is cylindrical, which is either a closed-loop cylinder (or an open-loop cylinder) and has a heating cavity 12 formed therein. The two ends of the nano-heating film body 2 are separated.

[0053] Example 7 differs from Example 1 in that: See [link to example 7] Figure 19 and Figure 20 As shown, the nano-heating film body 2 is annular, with its inner and outer ring edges forming a set of opposite edges.

[0054] The nano-heating film bodies in the above embodiments are taken from the nano-heating film products of Foshan Kaijia Technology Co., Ltd. The specific specifications of the nano-heating film body are as follows:

[0055] Appearance:

[0056] Shape: Rectangular;

[0057] Color: Matte black;

[0058] Flatness: Flat and smooth;

[0059] Trimming: aligning the edges.

[0060] Nominal thickness: 21 micrometers-100 micrometers.

[0061] Nominal sheet resistance: 10-1000 ohms

[0062] Tensile strength: greater than 110 MPa in the longitudinal direction and greater than 90 MPa in the transverse direction.

[0063] Elongation at break: greater than 30% in the longitudinal direction and greater than 30% in the transverse direction.

[0064] Elastic modulus: greater than 3 GPa in the longitudinal direction and greater than 3 GPa in the transverse direction.

[0065] Shrinkage rate: less than 0.15% longitudinally and less than 0.15% transversely.

[0066] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A composite nanoheating film, comprising a nanoheating film body (2), wherein at least one set of electrodes is provided on the nanoheating film body (2), and each set of electrodes comprises at least two electrode strips (3), characterized in that: The nano heating film body (2) is encapsulated inside the mica outer layer (1), and the mica outer layer (1) is in close contact with the surface of the nano heating film body (2).

2. The composite nano-heating film according to claim 1, characterized in that: A portion of the electrode strip (3) is exposed outside the mica outer layer (1), and the edge of the nano heating film body (2) is separated from the edge of the mica outer layer (1) by a certain distance.

3. The composite nano-heating film according to claim 2, characterized in that: The mica outer layer (1) has openings (11) in the area through which the electrode strip (3) passes, so that the electrode is exposed; the exposed part of the electrode strip (3) is located on the surface of the nano heating film body (2), or the exposed part of the electrode strip (3) extends out of the edge of the nano heating film body (2).

4. The composite nano-heating film according to claim 2, characterized in that: One end of the electrode strip (3) extends beyond the edge of the nano-heating film body (2) and beyond the mica outer layer (1).

5. The composite nano-heating film according to claim 1, characterized in that: The nano-heating film body (2) has at least one set of opposite sides with electrode strips (3) respectively. The electrode strips (3) extend along the edge of the nano-heating film body (2), and the two electrode strips (3) on the opposite sides form a set of electrodes.

6. The composite nano-heating film according to claim 1, characterized in that: The nano heating film body (2) is parallelogram-shaped; or, the nano heating film body (2) is annular, with its inner and outer ring edges forming a set of opposite edges.

7. The composite nano-heating film according to claim 1, characterized in that: The thickness of the nano-heating film body (2) is 5 micrometers to 150 micrometers, and it contains polyimide, carbon nanotubes and graphene.

8. The composite nano-heating film according to claim 1, characterized in that: The outer layer (1) of the mica is plate-shaped or cylindrical, and the cylindrical shape is either closed-loop or open-loop, with a heating cavity (12) formed in the cylindrical shape.

9. The composite nano-heating film according to claim 1, characterized in that: The upper and lower sides of the nano heating film body (2) are coated with mica slurry. After the mica slurry is hot-pressed and dried, it forms the mica outer layer (1). The thickness of the mica outer layer (1) is 0.2 mm to 2 mm.

10. The composite nano-heating film according to claim 1, characterized in that: At least one mica paper (P) is attached to the upper and lower sides of the nano heating film body (2), and the mica papers (P) attached to the upper and lower sides are combined to form the mica outer layer (1), and the thickness of the mica outer layer (1) is 0.2 mm to 2 mm.

Images