CN211267128U - Electrothermal film with PTC function - Google Patents
Electrothermal film with PTC function Download PDFInfo
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- CN211267128U CN211267128U CN202020218551.6U CN202020218551U CN211267128U CN 211267128 U CN211267128 U CN 211267128U CN 202020218551 U CN202020218551 U CN 202020218551U CN 211267128 U CN211267128 U CN 211267128U
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Abstract
The utility model relates to an electrothermal film with PTC function, the electrothermal film includes the insulating layer of both sides and middle heating layer, the heating layer includes heating film and the first busbar that is located heating film both sides, the heating film is connected with the first busbar electricity, the electrothermal film includes PTC thermistor component, PTC thermistor component includes response head and two connecting feet, wherein the response head is located the region that heating film corresponds, and is used for the temperature of the region that the induction heating film is located; one of the connection feet is connected with a first bus bar; and the other connecting foot part is connected with a power supply. Compared with the prior art, the utility model discloses an electric heat membrane PTC intensity is high, and the cycling performance is good.
Description
Technical Field
The application relates to the technical field of electric heating, in particular to an electrothermal film with a PTC function.
Background
PTC is an abbreviation for Positive Temperature Coefficient, and generally refers to a semiconductor material or a device having a large Positive Temperature Coefficient. In general, reference to PTC refers to a positive temperature coefficient thermistor, abbreviated as a PTC thermistor component. A PTC thermistor is a semiconductor resistor typically having temperature sensitivity, and its resistance value increases stepwise with an increase in temperature when a certain temperature (curie temperature) is exceeded. The structure of the electric heating film and the electric heating film roll is respectively shown in fig. 10 and fig. 11, the electric heating film and the electric heating film roll comprise insulating layers 1 on two sides and a heating layer in the middle, the heating layer comprises a heating film 3 and first bus bars 4 on two sides, when the electric heating film roll is used, the first bus bars 4 are electrified, and the heating film 3 generates heat. In order to improve the temperature controllability of the electric heating film, the PTC electric heating film appears on the market.
The existing PTC electric heating film mainly comprises two types. The electrothermal ink film is one heating coating with PTC function and made with PTC ink. The PTC function is mainly provided by a heating coating, belongs to the polymer PTC function, and has the defects of low PTC strength (generally less than 1) and poor cycle life (generally difficult to exceed 100 cycles), which is represented as short service life in the practical use of the electric heating film, although the PTC function is provided.
Another PTC heating device is a ceramic type PTC thermistor element, which provides a PTC effect mainly by the temperature resistance characteristics of ceramic materials, and which has a long cycle life (over ten thousands times) and a high PTC strength (several tens or hundreds). A general ceramic PTC thermistor device is divided into two parts: a head and a foot. The head part is the part which plays the role of PTC, and the foot part is mainly a conducting wire, and generally has two wires which are fed in and discharged out. Because the ceramic material is hard, it is difficult to process in large area, so it is difficult to use as flexible electric heating film or large area electric heating plate.
SUMMERY OF THE UTILITY MODEL
The purpose of this application is just to overcome the defect that above-mentioned prior art exists and provide a long service life's flexible electric heat membrane that has the PTC function.
In order to achieve the object of the present application, the present application provides the following technical solutions.
In a first aspect, the present application provides an electrothermal film with a PTC function, where the electrothermal film includes insulating layers on two sides and a middle heating layer, the heating layer includes a heating film and first bus bars located on two sides of the heating film, the heating film is electrically connected to the first bus bars, the electrothermal film includes a PTC thermistor element, the PTC thermistor element includes an induction head and two connection legs, where the induction head is located in a region corresponding to the heating film and is used to induce a temperature of the region where the heating film is located; one of the connection feet is connected with a first bus bar; and the other connecting foot part is connected with a power supply.
In the present application, the current flows from the power source, passes through the PTC thermistor element, and reaches the first bus bar, so that the heat generating film generates heat. And the temperature of the heating film is increased and can be sensed by the sensing head, so that the resistance of the sensing head is changed, and the current passing through the first bus bar is reduced. Finally, the constancy of temperature of heating film has realized the PTC function of this application electric heat membrane in certain extent.
The insulating film is generally a polymer film such as PET, PI, TPU, etc., and in case of the electric heating plate, the insulating film is replaced with an insulating plate, generally an epoxy resin plate, PP plate, PS plate, etc. The insulating film is mainly used for supporting the heating layer to keep the shape and protecting a user from electric shock.
The heating film is generally printed on a substrate by ink, the ink is polymer resin and conductive materials, such as graphene, graphite, carbon tubes, carbon black and the like, and the ink generates heat after being electrified.
The first bus bar is generally a metal material, such as a copper foil strip, an aluminum foil strip, a silver paste strip, a copper paste strip, and the like, and is mainly used as a lead for providing current for the heating film.
In a preferred version of the first aspect, the power source is directly connected to a connection pin.
In a preferred aspect of the first aspect, a second bus bar is provided between the power source and the connection leg portion. Preferably, the second bus bar is disposed between the two insulating layers, and the second bus bar is not in contact with the heat generating film. In one embodiment, only one second bus bar is provided in each of the electric heating films, and corresponds to one of the first bus bars, and the first bus bar and the second bus bar are connected together by the PTC thermistor element. In another embodiment, two second bus bars may be provided in each of the electric heating films, respectively corresponding to one of the first bus bars, and the first bus bars and the second bus bars may be connected together by the PTC thermistor elements.
In a preferred aspect of the first aspect, an electric wire is provided between the power source and the connection leg portion. Preferably, the electric wire is disposed outside the electric heating film. In one embodiment, only one wire is disposed outside each of the electric heating films, and corresponds to one of the first bus bars, and the first bus bar and the wire are connected together by the PTC thermistor element. In another embodiment, two wires may be disposed outside each of the electric heating films, each of the wires corresponding to one of the first bus bars, and the first bus bars and the wires are connected together by the PTC thermistor device.
In a preferred aspect of the first aspect, the induction head is disposed between the two sealing layers and is in close contact with the heat generating film.
In a preferred aspect of the first aspect, the sensing head is disposed outside the insulating layer and in close proximity to the insulating layer.
Compared with the prior art, the beneficial effect of this application lies in:
(1) the design of combining the heating coating and the PTC thermistor element is adopted, so that the PTC strength of the electric heating film is high, and the cycle performance is good;
(2) simple structure, easy manufacture and good market prospect.
Drawings
FIG. 1 is a schematic structural view of an electrothermal film in embodiment 1;
FIG. 2 is a schematic view showing the structure of an electrothermal film roll in embodiment 2;
FIG. 3 is a schematic structural view of an electrothermal film according to embodiment 3;
FIG. 4 is a schematic view showing the structure of an electrothermal film roll in embodiment 4;
FIG. 5 is a schematic structural view of an electrothermal film according to embodiment 5;
FIG. 6 is a schematic view showing the structure of an electrothermal film roll in embodiment 6;
FIG. 7 is a schematic view showing the structure of an electrothermal film according to embodiment 7;
FIG. 8 is a schematic view showing the structure of an electrothermal film roll in embodiment 8;
FIG. 9 is a schematic side view of an electric heating film or an electric heating film roll in embodiments 1-8;
FIG. 10 is a schematic structural diagram of a common electrothermal film without PTC function;
fig. 11 is a schematic structural view of a general electrothermal film roll without PTC function.
Wherein, 1 is an insulating layer, 2 is a heating layer, 3 is a heating film, 4 is a first bus bar, 5 is a PTC thermistor element, 51 is an induction head, 52 is a connecting foot, 6 is a second bus bar, and 7 is an electric wire.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Description of raw material sources:
the heat generating film in the embodiment is provided by the selfingbo graphene Innovation center, Inc., the PTC thermistor element is purchased from Guangzhou City Hensheng electronics, Inc., and the first bus bar and the second bus bar use copper foils.
Example 1
A composite electric heating membrane with PTC function is shown in figures 1 and 9 and comprises two insulating layers 1 and a heating layer 2 arranged between the two insulating layers 1, wherein the heating layer comprises a graphene heating film 3 and two first bus bars 4, a PTC thermistor element 5 is taken, one connecting foot 52 of the PTC thermistor element is connected with one end of each first bus bar in a soldering tin mode, and the other connecting foot 52 is used as a joint for externally connecting the composite electric heating membrane. The induction head 51 of the PTC thermistor element 5 is tightly attached to the heating film 3 by using an electrical tape, so that the composite electric heating film with the PTC function is obtained.
Example 2
The utility model provides a compound electric heat membrane book with PTC function, its structure is shown in fig. 2, fig. 9, includes two insulating layers 1 and sets up the layer 2 that generates heat between two insulating layers 1, and this layer that generates heat includes graphite alkene heating film 3 and two first bus bars 4, and wherein, insulating layer 1, first bus bar 4 are unlimited to be extended forward, and heating film 3 interval formula is arranged. One end of the first bus bar 4 is electrically connected with one connecting foot 52 of the PTC thermistor element 5 by taking a PTC thermistor element 5 and soldering tin, and the other connecting foot 52 is used as a joint for externally connecting the composite electric heating film. The induction head 51 of the PTC thermistor element 5 is tightly attached to the heating film 3 by using an electrical tape, and the composite electric heating film roll with the PTC function is obtained.
Example 3
A composite electric heating membrane with PTC function is shown in figures 3 and 9, and comprises two insulating layers 1 and a heating layer 2 arranged between the two insulating layers 1, wherein the heating layer comprises a graphene heating film 3 and two first bus bars 4, the heating layer is also provided with a second bus bar 6 on the edge of the first bus bar 4 at one side, and the second bus bar 6 is not connected with the heating film 3; one PTC thermistor element 5 is used, and the first bus bar 4 on the side close to the second bus bar 6 is electrically connected to one connecting leg portion 52 of the PTC thermistor element 5 by rivet connection, and the second bus bar 6 is connected to the other connecting leg portion 52 of the PTC thermistor element 5 by rivet connection. The induction head 51 of the PTC thermistor element 5 is tightly attached to the heating film 3 by using an electrical tape, so that the composite electric heating film with the PTC function is obtained.
Example 4
The utility model provides a compound electric heat membrane book with PTC function, its structure is shown in fig. 4, fig. 9, includes two insulating layers 1 and sets up the layer 2 that generates heat between two insulating layers 1, and this layer that generates heat includes graphite alkene heating film 3 and two first busbar 4, and wherein, insulating layer 1 infinitely extends forward, and heating film 3 interval formula is arranged. The heat generating layer 2 is further provided with a second bus bar 6 on the side of the first bus bar 4 on one side, and the second bus bar 6 is not connected with the heat generating film 3 and extends forwards infinitely. The first bus bar 4 of one side of the electric heating film roll has no connection between the adjacent heating films 3, and the first bus bar 4 of the other side has a connection between the adjacent heating films 3, i.e., extends forward indefinitely. One PTC thermistor element 5 is used, and the first bus bar 4 on the side close to the second bus bar 6 is electrically connected to one connecting leg portion 52 of the PTC thermistor element 5 by rivet connection, and the second bus bar 6 is connected to the other connecting leg portion 52 of the PTC thermistor element 5 by rivet connection. The induction head 51 of the PTC thermistor element 5 is tightly attached to the heating film 3 by using an electrical tape, and the composite electric heating film roll with the PTC function is obtained.
Example 5
The composite electric heating membrane with the PTC function has the structure shown in figures 5 and 9, and comprises two insulating layers 1 and a heating layer 2 arranged between the two insulating layers 1, wherein the heating layer comprises a graphene heating film 3 and two first bus bars 4. An electric wire 7 is arranged on the outer side of the electric heating diaphragm, and the electric wire 7 is not connected with the electric heating diaphragm. One PTC thermistor element 5 is provided, and one connection leg 52 of the PTC thermistor element 5 is electrically connected to one first bus bar 4, and the other connection leg 52 is electrically connected to the electric wire 7 by soldering. The induction head 51 of the PTC thermistor element 5 is tightly attached to the heating film 3 by using an electrical tape, so that the composite electric heating film with the PTC function is obtained.
Example 6
The utility model provides a compound electric heat membrane book with PTC function, its structure is shown in fig. 6, 9, includes two insulating layers 1 and sets up the layer 2 that generates heat between two insulating layers 1, and this layer that generates heat includes graphite alkene heating film 3 and two first busbar 4, and wherein, insulating layer 1 infinitely extends forward, and heating film 3 interval formula is arranged. An electric wire 7 which extends forwards infinitely is arranged on the outer side of the electric heating film, and the electric wire 7 is not connected with the electric heating film roll. The first bus bar 4 of one side of the film roll has no connection between the adjacent heat generating films 3, and the first bus bar 4 of the other side has a connection between the adjacent heat generating films 3, i.e., extends forward endlessly. One PTC thermistor element 5 is provided, and one connection leg 52 of the PTC thermistor element 5 is electrically connected to one first bus bar 4, and the other connection leg 52 is electrically connected to the electric wire 7 by soldering. The induction head 51 of the PTC thermistor element 5 is tightly attached to the heating film 3 by using an electrical tape, and the composite electric heating film roll with the PTC function is obtained.
Example 7
The composite electric heating membrane with the PTC function has the structure shown in figures 7 and 9, and comprises two insulating layers 1 and a heating layer 2 arranged between the two insulating layers 1, wherein the heating layer comprises a graphene heating film 3 and two first bus bars 4. The electric heating membrane is also provided with a second bus bar 6 on the edges of the first bus bars 4 at two sides respectively, and the second bus bar 6 is not connected with the heating film 3; one PTC thermistor element 5 is used, and the first bus bar 4 on the side close to the second bus bar 6 is electrically connected to one connecting leg portion 52 of the PTC thermistor element 5 by rivet connection, and the second bus bar 6 is connected to the other connecting leg portion 52 of the PTC thermistor element 5 by rivet connection. The induction head 51 of the PTC thermistor element 5 is tightly attached to the heating film 3 by using an electrical tape, so that the composite electric heating film with the PTC function is obtained.
Example 8
A composite electric heating film roll with a PTC function is structurally shown in figures 8 and 9 and comprises two insulating layers 1, a heating layer 2 and a PTC thermistor element 5, wherein the heating layer 2 and the PTC thermistor element 5 are arranged between the two insulating layers 1, the heating layer comprises a graphene heating film 3 and two first bus bars 4, the insulating layers 1 extend forwards infinitely, and the heating film 3 is arranged at intervals. The electrothermal film is coiled with a second bus bar 6 which extends forwards infinitely on the edges of the first bus bars 4 at two sides, and the second bus bar 6 is not connected with the heating film. The first bus bars 4 on both sides of the electric heating film roll are not connected between the adjacent heating films.
When the electric heating film is prepared, intermediate products respectively comprising the insulating layer 1, the heating layer 2, the first bus bar 4 and the second bus bar 6 from bottom to top are prepared, the PTC thermistor element 5 is placed according to the figure, one connecting foot part 52 is connected with the first bus bar 4, the other connecting foot part 52 is connected with the second bus bar 6, and the other connecting foot part 52 connected with the second bus bar 6 is not connected with the first bus bar 4. And then the insulating layer 1 with the heat-sensitive adhesive is arranged above the insulating layer, and the composite electric heating film roll with the PTC function is obtained through hot-pressing and compounding.
The embodiments described above are intended to facilitate the understanding and appreciation of the application by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present application is not limited to the embodiments herein, and those skilled in the art who have the benefit of this disclosure will appreciate that many modifications and variations are possible within the scope of the present application without departing from the scope and spirit of the present application.
Claims (7)
1. An electrothermal film with a PTC function comprises insulating layers on two sides and a heating layer in the middle, wherein the heating layer comprises a heating film and first bus bars positioned on two sides of the heating film, the heating film is electrically connected with the first bus bars, the electrothermal film is characterized by comprising a PTC thermistor element, the PTC thermistor element comprises an induction head and two connecting feet, and the induction head is positioned in a region corresponding to the heating film and used for inducing the temperature of the region where the heating film is positioned; one of the connection feet is connected with a first bus bar; and the other connecting foot part is connected with a power supply.
2. An electrothermal film with a PTC function according to claim 1, wherein a second bus bar is provided between the power source and the connection pin portion.
3. The electrothermal film with a PTC function according to claim 2, wherein the second bus bar is disposed between two insulating layers, and the second bus bar is not in contact with the heat generating film.
4. An electrothermal film with a PTC function according to claim 1, wherein an electric wire is provided between the power source and the connection leg portion.
5. The electrothermal film with a PTC function according to claim 4, wherein the electric wire is provided outside the electrothermal film.
6. An electrothermal film with PTC function according to claim 1, wherein said induction head is disposed between two sealing layers and is closely attached to the heating film.
7. An electrothermal film with a PTC function according to claim 1, wherein said induction head is disposed outside the insulating layer and closely attached to the insulating layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020218551.6U CN211267128U (en) | 2020-02-27 | 2020-02-27 | Electrothermal film with PTC function |
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| CN202020218551.6U CN211267128U (en) | 2020-02-27 | 2020-02-27 | Electrothermal film with PTC function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023276464A1 (en) * | 2021-06-30 | 2023-01-05 | 東京コスモス電機株式会社 | Planar heating element, optical device, and method for manufacturing planar heating element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023276464A1 (en) * | 2021-06-30 | 2023-01-05 | 東京コスモス電機株式会社 | Planar heating element, optical device, and method for manufacturing planar heating element |
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