A transparent graphene heating film for defogging of an automobile front windshield and a manufacturing method thereof

Abstract

The application discloses a transparent graphene heating film for removing fog on a front windshield of an automobile, which comprises a transparent base film and a transparent cover film attached to the surface of the transparent base film; a graphene heating layer is arranged between the transparent base film and the transparent cover film, and the graphene heating layer is composed of multiple groups of graphene heating lines which are parallel to each other. The transparent graphene heating film for removing fog on the front windshield of the automobile adopts the graphene heating layer as a heating core, and compared with a conventional heating film, the total effective electric heating energy conversion rate is high, the heating performance is stable, low-voltage driving, low current and low power consumption are achieved; the transparent graphene heating film for removing fog on the front windshield of the automobile adopts multiple groups of graphene heating lines which are arranged in parallel, and during use, one group, two groups or multiple groups can be controlled to work under power-on according to the use environment, and the energy saving effect is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating film, in particular to a transparent graphene heating film for defogging of automobile front windshield, and especially to a manufacturing method of the transparent graphene heating film for defogging of automobile front windshield. BACKGROUND

[0002] Due to the temperature difference between the inside and outside of the car, the front windshield of the car is prone to fogging, which can block the view and affect driving if not removed in time. The existing defogging methods generally have two kinds, one of which is to blow hot air from bottom to top on the inner side of the front windshield to heat the front windshield, so that the fog is removed under the action of the hot air; the other is to heat the front windshield by using a heating film to volatilize the fog and remove the fog.

[0003] The existing two methods have the defect of high energy consumption, especially the second method of using a heating film to heat, which cannot adjust the power in real time regardless of the temperature difference between the inside and outside of the car; it always works at rated power and cannot be intuitively found, often forgetting to turn off, and has high energy consumption. SUMMARY

[0004] The purpose of the present application is to provide a transparent graphene heating film for defogging of automobile front windshield and a manufacturing method thereof to solve the problem of high energy consumption of the heating film for defogging of the front windshield of the car in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A transparent graphene heating film for defogging of automobile front windshield, comprising a transparent base film and a transparent cover film attached to the surface of the transparent base film; a graphene heating layer is arranged between the transparent base film and the transparent cover film, and the graphene heating layer is composed of a plurality of groups of mutually parallel graphene heating lines.

[0007] As a preferred, one side of the transparent base film is provided with an integral outwardly extending connecting piece, the end portions of the graphene heating lines are arranged on the connecting piece, and the end portions of the graphene heating lines are arranged in a ring structure, and a through hole is formed in the center of the ring structure on the connecting piece.

[0008] As a preferred, a plurality of creases are arranged on the connecting piece.

[0009] As a preferred, a plurality of metal oxides of tungsten, vanadium, tin and antimony are added to the transparent base film and the transparent cover film, and the super-micro-nano particles are prepared by high-temperature sintering and hybrid extraction, which have excellent weather resistance and infrared absorption performance.

[0010] The application also provides a manufacturing method of the transparent graphene heating film for defogging of the automobile front windshield glass.

[0011] S1, preparing a circular intermediate film, the intermediate film is provided with a tearable strip corresponding to the graphene heating circuit;

[0012] S2, pasting the intermediate film on the circular transparent base film, then tearing off the tearable strip to expose the same space as the graphene heating circuit on the transparent base film;

[0013] S3, laying the transparent base film completed in S2 in the spin coating box of the multi-center spin coating mechanism, the side of the transparent base film with the intermediate film faces upward, then pouring the graphene solution into the spin coating box and pressing the cover plate;

[0014] S4, completing the spin coating and drying after adjusting the rotation center and the spin coating speed of the multi-center spin coating mechanism for multiple times;

[0015] S5, taking out the transparent base film, tearing off the residual intermediate film on the transparent base film, then pasting the transparent cover film on the side of the transparent base film with the graphene heating circuit;

[0016] S6, cutting the shape and punching the through hole at the connecting piece, then cutting off a part of the transparent cover film corresponding to the position of the connecting piece to expose the annular structure on the connecting piece, finally folding the connecting piece several times to form the crease, thus completing the manufacturing of the transparent graphene heating film for defogging of the automobile front windshield glass.

[0017] Preferably, the multi-center spin coating mechanism mentioned in S3 and S4 comprises:

[0018] A spin coating machine body, a rectangular slide is slidingly installed on the rotating disc of the spin coating machine body, a spin coating box is installed on the upper part of the slide, the horizontal center line of the slide and one diameter of the rotating disc are in the same vertical plane; a driving mechanism capable of driving the slide to slide and stop is installed on the rotating disc; when the position of the slide on the rotating disc changes, the spin coating center of the graphene solution in the spin coating box on the transparent base film changes, thus realizing multi-center spin coating.

[0019] Preferably, the driving mechanism comprises a lead screw and a slide rod rotatingly installed on the rotating disc, a threaded sleeve and a slide sleeve are respectively fixedly connected to the two sides of the slide, the threaded sleeve is screwed on the lead screw, the slide sleeve is slidingly sleeved on the slide rod, a lead screw motor for driving the lead screw to rotate is fixedly installed on the rotating disc, and a storage battery for power supply is also installed on the rotating disc.

[0020] As preferred, the rotating disc is provided with a DSP controller, the lead screw motor is controlled by the DSP controller, one side of the spin coater body is provided with a spin coater controller, the spin coater controller and the DSP controller are both provided with wireless communication modules, and wireless connection is realized through wireless communication.

[0021] As preferred, the rotating disc is provided with a stepped groove, the bottom of the sliding base is slidingly arranged in the stepped groove, the bottom of the stepped groove is provided with a sliding groove, the sliding groove is slidingly provided with a counterweight plate, one end of the sliding groove is fixedly connected with a fixing rod, one side of the fixing rod is fixedly provided with an electric push rod, and one end of the electric push rod is fixedly connected with one end of the counterweight plate; the electric push rod is controlled by the DSP controller; the rotating disc is further provided with a counterweight block symmetrically arranged with the storage battery; and the storage battery is a dry storage battery.

[0022] As preferred, the top surface of the sliding base is provided with a placing groove, the spin coating box is arranged in the placing groove, the top of the spin coating box is provided with a stepped opening, the stepped opening is provided with a cover plate, the upper surface of the cover plate is provided with a strip-shaped opening and a circular groove, the top surface of the cover plate is fixedly connected with a handle, the bottom of the cover plate is fixedly connected with a rubber pressing rod, and one side of the spin coating box is fixedly connected with a pull handle; the upper portion of the sliding base is fixedly connected with a gantry, the gantry is threadedly provided with a screw rod, the upper end of the screw rod is fixedly provided with a hand wheel, and the lower end of the screw rod is fixedly provided with a circular pressing block; when the screw rod is rotated through the hand wheel to make the circular pressing block press downward, the circular pressing block can be pressed in the circular groove on the cover plate.

[0023] Compared with the prior art, the application has the following advantages:

[0024] 1. The transparent graphene heating film for defogging of the front windshield of the automobile adopts a graphene heating layer as a heating core, has high total effective electric heating energy conversion rate, stable heating performance, low-voltage driving, low current and low power consumption compared with conventional heating films.

[0025] 2. The transparent graphene heating film for defogging of the front windshield of the automobile adopts a plurality of groups of graphene heating lines arranged in parallel, and one group, two groups or multiple groups can be controlled to work in power-on mode according to the use environment, which is more energy-saving.

[0026] 3. The manufacturing method of the transparent graphene heating film for defogging of the front windshield of the automobile adopts the existing spin coating method, has low cost, and is improved on the existing spin coater to realize multi-center spin coating, thereby improving the uniformity and increasing the bending strength of the graphene film compared with the graphene film manufactured by the existing spin coating method.

[0027] 4. The manufacturing method of the transparent graphene heating film for defogging the front windshield of the automobile can realize multi-center regulation spin coating by wireless control without stopping the machine, and is very convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Fig. 1 is a structural schematic diagram of the transparent substrate film and graphene heating circuit of the present application;

[0029] Figure 2 Fig. 2 is an enlarged structural schematic diagram of part A in the present application; Figure 1

[0030] Figure 3 Fig. 3 is a structural schematic diagram of the transparent cover film of the present application;

[0031] Figure 4 Fig. 4 is a structural schematic diagram of the spin coater main body and rotating disc of the present application;

[0032] Figure 5 Fig. 5 is a structural schematic diagram of the sliding seat of the present application;

[0033] Figure 6 Fig. 6 is a split structural schematic diagram of the spin coating box of the present application;

[0034] Figure 7 Fig. 7 is a structural schematic diagram of the intermediate film of the present application.

[0035] In the figure: 1, transparent substrate film; 2, graphene heating circuit; 201, annular structure; 3, connecting sheet; 301, through hole; 302, crease; 4, transparent cover film;

[0036] 5, spin coating box; 501, handle; 502, step opening; 503, limiting strip;

[0037] 6, cover plate; 601, strip opening; 602, handle; 603, circular groove; 604, rubber pressing rod;

[0038] 7, sliding seat; 701, threaded sleeve; 702, placing groove; 703, gantry; 704, hand wheel; 705, screw rod; 706, circular pressing block; 707, limiting groove;

[0039] 8, spin coater main body; 801, spin coater controller; 9, rotating disc; 901, storage battery; 902, DSP controller; 903, screw motor; 904, screw rod; 905, fixed rod; 906, electric push rod; 907, counterweight plate; 908, step groove; 909, sliding groove; 910, sliding rod; 911, counterweight block;

[0040] a, intermediate film; b, easy-to-tear strip. DETAILED DESCRIPTION

[0041] ​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0042] Embodiment 1

[0043] Please refer to Figures 1-3 The present application provides a technical solution:

[0044] A transparent graphene heating film for defogging of an automobile front windshield, comprising a transparent base film 1 and a transparent cover film 4 attached to the surface of the transparent base film 1; a graphene heating layer is arranged between the transparent base film 1 and the transparent cover film 4, and the graphene heating layer is composed of a plurality of groups of graphene heating lines 2 arranged in parallel.

[0045] In the embodiment, the plurality of groups of graphene heating lines 2 arranged in parallel are used in cooperation with an automobile. Since the automobile generally has the function of detecting the temperature inside and outside the automobile, when the temperature inside and outside the automobile and the speed data are obtained, one group, two groups or more groups of graphene heating lines 2 can be selected (controlled by a vehicle-mounted controller) to be powered on and enter a working state according to needs. In this way, heating and defogging can be reasonably performed according to the environment, and energy saving is more.

[0046] Specifically as follows:

[0047] When the vehicle speed is lower than 50 km / h and the temperature difference between the inside and outside of the automobile is lower than 5℃, one group of graphene heating lines 2 is used to work;

[0048] When the vehicle speed is lower than 50 km / h and the temperature difference between the inside and outside of the automobile is 5-10℃, two groups of graphene heating lines 2 are used to work;

[0049] When the vehicle speed is high speed 90 km / h and the temperature difference between the inside and outside of the automobile is 5-10℃, three groups of graphene heating lines 2 are used to work;

[0050] When the vehicle speed is high speed 90 km / h and the temperature difference between the inside and outside of the automobile is higher than 15℃, four groups of graphene heating lines 2 are used to work.

[0051] The above working modes are only for data reference, and in actual use, the parameters can be set according to the geographical environment (north, south, winter, summer, etc.), real-time temperature, vehicle speed, etc. In the implementation, the vehicle-mounted controller can also be manually controlled, and the operation is flexible and variable.

[0052] Embodiment 2

[0053] Different from the embodiment 1, the transparent substrate film 1 is provided with an integral outwardly extending connecting piece 3 on one side, the end portions of the graphene heating lines 2 are arranged on the connecting piece 3, and the end portions of the graphene heating lines 2 are arranged in a ring structure 201, and a through hole 301 is arranged in the center of the ring structure 201 on the connecting piece 3. In this way, after the transparent graphene heating film is pasted on the vehicle, the electrical connection with the vehicle-mounted controller can be quickly realized (an electric clamp or a terminal or other similar electrical connecting piece capable of being quickly matched and locked with the ring structure 201 needs to be provided).

[0054] Embodiment 3

[0055] Different from the embodiment 2, a plurality of creases 302 are arranged on the connecting piece 3. Since the connecting piece 3 needs to be electrically connected with the vehicle-mounted controller, the connecting piece 3 needs to be frequently lifted and moved, and the transparent graphene heating film pasted can be avoided from being lifted through the creases 302, so that the electrical connection can be realized.

[0056] Embodiment 4

[0057] Different from the embodiment 3, the transparent substrate film 1 and the transparent cover film 4 are both added with super-micro-nano particles of a plurality of metal oxides of tungsten, vanadium, tin and antimony prepared through high-temperature sintering and hybrid extraction, which have excellent weather resistance and infrared absorption performance.

[0058] Embodiment 5

[0059] The application also provides a manufacturing method of the transparent graphene heating film for defogging of a front windshield of a vehicle, which comprises the following steps:

[0060] S1, a circular intermediate film a (as shown in the drawing) is prepared, and the intermediate film a is provided with a tearable strip b corresponding to the graphene heating lines 2; Figure 7

[0061] S2, the intermediate film a is pasted on the circular transparent substrate film 1, and then the tearable strip b is torn off, so that the same space as the graphene heating lines 2 is exposed on the transparent substrate film 1;

[0062] S3, the transparent substrate film 1 completed in S2 is laid in a spin coating box 5 of a multi-center spin coating mechanism with the side of the intermediate film a upward, then graphene solution is poured into the spin coating box 5, and a cover plate 6 is covered and pressed tightly;

[0063] ​S4, after adjusting the rotation center (the sliding distance can be controlled to move 5cm, 10cm, 15cm, 20cm, etc. in the left or right direction) and adjusting the spin coating speed (the spin coating speed is controlled at 400r / min, 600r / min or 800r / min, or the intermediate speed is used, and finally 1200r / min is used for high speed spin drying) by the multi-center spin coating mechanism, spin coating and drying are completed;

[0064] S5, the transparent substrate film 1 is taken out, the intermediate film a remaining on the transparent substrate film 1 is torn off, and then the transparent cover film 4 is pasted on the side of the transparent substrate film 1 with the graphene heating line 2;

[0065] S6, the shape is cut out, the through hole 301 is punched at the connecting piece 3, then a part of the transparent cover film 4 corresponding to the position of the connecting piece 3 is cut off, so that the annular structure 201 on the connecting piece 3 can be exposed, and finally the connecting piece 3 is folded several times to form the crease 302, thus the manufacturing of the transparent graphene heating film for automobile windshield defogging is completed.

[0066] In implementation, the multi-center spin coating mechanism mentioned in S3 and S4 includes: Figures 4-6 as shown, specifically comprising:

[0067] The spin coating machine body 8 is installed with the rectangular sliding seat 7 on the rotating disc 9, the upper part of the sliding seat 7 is installed with the spin coating box 5, the horizontal center line of the sliding seat 7 and one diameter of the rotating disc 9 are in the same vertical plane; the rotating disc 9 is installed with the driving mechanism capable of driving the sliding seat 7 to slide and stop; when the position of the sliding seat 7 on the rotating disc 9 changes, the spin coating center of the graphene solution in the spin coating box 5 on the transparent substrate film 1 will change, thereby realizing multi-center spin coating.

[0068] Specifically, the driving mechanism includes the screw rod 904 and the sliding rod 910 rotatably installed on the rotating disc 9, the sliding seat 7 is fixedly connected with the threaded sleeve 701 and the sliding sleeve on both sides, the threaded sleeve 701 is screwed on the screw rod 904, the sliding sleeve is slidably sleeved on the sliding rod 910, the rotating disc 9 is fixedly installed with the screw rod motor 903 for driving the screw rod 904 to rotate, and the rotating disc 9 is also installed with the storage battery 901 for power supply.

[0069] It should be noted that in implementation, the storage battery 901 cannot use wet battery or liquid battery, which is easy to fail under high speed rotation.

[0070] as shown, Figure 4As shown, the rotating disc 9 is provided with a DSP controller 902, and the screw rod motor 903 is controlled by the DSP controller 902. The spin coater main body 8 is provided with a spin coater controller 801. The spin coater controller 801 and the DSP controller 902 are both provided with wireless communication modules and are wirelessly connected through wireless communication. The wireless communication module can be a Bluetooth module or a local area network module.

[0071] In particular, the rotating disc 9 is provided with a stepped groove 908, and the bottom of the sliding seat 7 is slidingly installed in the stepped groove 908. The bottom of the stepped groove 908 is provided with a sliding groove 909, and the sliding groove 909 is slidingly installed with a counterweight plate 907. One end of the sliding groove 909 is fixedly connected with a fixed rod 905, and the fixed rod 905 is fixedly installed with an electric push rod 906 on one side. One end of the electric push rod 906 is fixedly connected to one end of the counterweight plate 907. The electric push rod 906 is controlled by the DSP controller 902. The rotating disc 9 is also provided with a counterweight 911 which is symmetrically arranged with the battery 901. The battery 901 is a dry battery.

[0072] Because the application needs to frequently adjust the rotation center during use, and the sliding seat 7 is easy to cause unstable center of gravity after sliding left and right. Therefore, the counterweight 911 and the counterweight plate 907 are arranged to flexibly cooperate with the sliding of the sliding seat 7, so that the balance can be maintained during rotation (the sliding seat 7 moves to the left, and the counterweight plate 907 moves to the right. Similarly, the reverse is also true).

[0073] In addition, the top surface of the sliding seat 7 is provided with a placing groove 702, and the spin coater box 5 is placed in the placing groove 702 (at the same time, it is necessary to note that a limiting strip 503 is integrally arranged on the outer side of the spin coater box 5, and a limiting groove 707 is arranged on the inner side of the placing groove 702, and the limiting strip 503 can be clamped in the limiting groove 707). The top of the spin coater box 5 is provided with a stepped opening 502, and the stepped opening 502 is installed with a cover plate 6. The upper surface of the cover plate 6 is provided with a strip-shaped opening 601 and a circular groove 603, and the top surface of the cover plate 6 is fixedly connected with a handle 602. The bottom of the cover plate 6 is fixedly bonded with a rubber pressing rod 604, and one side of the spin coater box 5 is fixedly connected with a handle 501. The upper part of the sliding seat 7 is fixedly connected with a gantry 703, and the gantry 703 is screwedly installed with a screw rod 705. The upper end of the screw rod 705 is fixedly installed with a hand wheel 704, and the lower end of the screw rod 705 is fixedly installed with a circular pressing block 706. When the screw rod 705 is rotated by the hand wheel 704 to make the circular pressing block 706 press downward, the circular pressing block 706 can be pressed in the circular groove 603 on the cover plate 6.

[0074] In summary, the application adopts graphene heating layer as heating core, compared with conventional heating film, it has high total effective electric heating energy conversion rate, and has stable heating performance, can be driven at low voltage, low current and low power consumption; adopt multiple groups of parallel graphene heating lines 2, in use, can control one group, two groups or multiple groups to work, more energy-saving. At the same time, the application uses existing spin coating method to manufacture, the cost is low; at the same time, the existing spin coater is improved, multiple center spin coating can be realized, compared with the graphene film manufactured by the existing spin coating method, not only the uniformity is improved, but also the bending strength is increased; and under the condition of not stopping, wireless control is used to realize multiple center adjustment spin coating, which is very convenient in operation.

[0075] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a transparent graphene heating film for defogging automotive windshields, characterized in that, Includes the following steps: S1. Prepare a circular intermediate film with easy-tear strips corresponding to the graphene heating circuit. S2. Adhere the intermediate film to the circular transparent base film, and then remove the easy-tear strip to expose an empty space on the transparent base film that is the same as the graphene heating circuit. S3. Lay the transparent base film completed in S2 flat in the spin coating box of the multi-center spin coating mechanism, with the side of the transparent base film with the intermediate film facing upward. Then pour the graphene solution into the spin coating box, cover it with the cover plate and press it tightly. S4. After adjusting the rotation center and spin speed multiple times through the multi-center spin coating mechanism, spin coating and drying are completed. S5. Remove the transparent base film, peel off the remaining intermediate film on the transparent base film, and then attach a transparent cover film to the side of the transparent base film with the graphene heating circuit. S6. Cut out the shape and punch through holes at the connecting piece. Then cut off a portion of the transparent cover film corresponding to the position of the connecting piece to expose the ring structure on the connecting piece. Finally, fold the connecting piece several times to form creases. This completes the manufacturing of the transparent graphene heating film for defogging automotive windshields.

2. The method for manufacturing a transparent graphene heating film for defogging automotive windshields according to claim 1, characterized in that, The multi-center spin coating mechanisms mentioned in S3 and S4 include: The main body of the spin coater has a rectangular slide mounted on its rotating disk. A spin coating box is mounted on the upper part of the slide. The horizontal center line of the slide and one diameter of the rotating disk are on the same vertical plane. A drive mechanism is installed on the rotating disk to drive the slide to slide and stop. When the position of the slide on the rotating disk changes, the spin coating center of the graphene solution in the spin coating box on the transparent substrate film will change, thereby realizing multi-center spin coating.

3. The method for manufacturing a transparent graphene heating film for defogging automotive windshields according to claim 2, characterized in that: The driving mechanism includes a lead screw and a slide rod rotatably mounted on a rotating disk. A threaded sleeve and a sliding sleeve are fixedly connected to both sides of the slide block, respectively. The threaded sleeve is threaded onto the lead screw, and the sliding sleeve is slidably fitted onto the slide rod. A lead screw motor for driving the lead screw to rotate is fixedly mounted on the rotating disk, and a storage battery for power supply is also installed on the rotating disk.

4. The method for manufacturing a transparent graphene heating film for defogging automotive windshields according to claim 3, characterized in that: A DSP controller is installed on the rotary disk, and the lead screw motor is controlled by the DSP controller. A spin coater controller is installed on one side of the spin coater body. Both the spin coater controller and the DSP controller are equipped with wireless communication modules and are wirelessly connected through wireless communication.

5. The method for manufacturing a transparent graphene heating film for defogging automotive windshields according to claim 4, characterized in that: The rotating disk has a stepped groove, and the bottom of the slide block is slidably installed in the stepped groove. The bottom of the stepped groove has a sliding groove, and a counterweight plate is slidably installed inside the sliding groove. A fixed rod is fixedly connected to one end of the sliding groove, and an electric push rod is fixedly installed on one side of the fixed rod. One end of the electric push rod is fixedly connected to one end of the counterweight plate. The electric push rod is controlled by the DSP controller. The rotating disk is also equipped with counterweight blocks symmetrically arranged with the battery. The battery is a dry-cell battery.

6. The method for manufacturing a transparent graphene heating film for defogging automotive windshields according to claim 5, characterized in that: The top surface of the slide has a mounting groove, and the spin coating box is placed in the mounting groove. The top of the spin coating box has a stepped opening, and a cover plate is installed in the stepped opening. The upper surface of the cover plate has a strip-shaped opening and a circular groove, and a handle is fixedly connected to the top surface of the cover plate. A rubber pressure rod is fixedly bonded to the bottom of the cover plate, and a handle is fixedly connected to one side of the spin coating box. A gantry frame is fixedly connected to the upper part of the slide, and a screw is threaded onto the gantry frame. A handwheel is fixedly installed at the upper end of the screw, and a circular pressure block is fixedly installed at the lower end of the screw. When the screw is rotated by the handwheel to press down the circular pressure block, the circular pressure block can be pressed tightly into the circular groove on the cover plate.

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