Membrane assembly formed by combining graphene carbon heat-conducting sheet and reversible drying agent membrane and used for demisting automobile lamp

Abstract

The utility model discloses a graphene carbon heat-conducting fin and reversible desiccant membrane combined membrane component for demisting an automobile lamp, a graphene carbon heat-conducting fin layer comprises a heat absorption area and a heat conduction area, the heat absorption area is arranged towards a heating element in the automobile lamp and is used for absorbing infrared heat, the heat conduction area is formed by extending from the heat absorption area to a cold area which is easy to fog, and the reversible desiccant membrane is arranged in the heat conduction area. The heat is exported for demisting; the reversible drying agent diaphragm layer is arranged in the heat conduction area and comprises a supporting framework layer, a functional layer and active filler; the support framework layer is an expanded polytetrafluoroethylene membrane with a microporous structure, the fog absorbent slurry forms a functional layer on the surface of the expanded polytetrafluoroethylene membrane, and the fog absorbent slurry is embedded into the microporous structure to form active filling. According to the utility model, heat generated by electrical elements in the automobile lamp is utilized to realize moisture absorption and desorption circulation of the reversible drying agent diaphragm, so that the fogging problem of a novel flat and long and narrow belt type automobile lamp is effectively solved, the structure is simple, and the cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile lamp defogging, in particular to a film assembly combined with a graphene carbon heat conduction sheet and a reversible desiccant film sheet for automobile lamp defogging. BACKGROUND

[0002] With the rapid production of new energy vehicles and new models of new four automakers, the automakers continue to launch avant-garde, fashionable and technology-rich models to meet the needs of consumers. The automobile lamp is the eye of the automobile and the embodiment of the beauty of the automobile. Therefore, the automobile lamp has a new trend of major changes in appearance and structure. The new design of the automobile lamp includes the following types: flat and narrow strip type.

[0003] Split headlamp: this design separates the daytime running light from the headlamp. The daytime running light is usually located in the traditional headlamp position, while the headlamp is in the fog lamp position or integrated with the frameless mesh. The design of the split headlamp gives people a sense of avant-garde and fashion.

[0004] Through type headlamp: this design designs the headlamp group into a long strip shape, which penetrates through the entire front of the vehicle, usually in harmony with the front face style, showing a unique style. The through type headlamp not only improves the visual width of the vehicle, but also increases the sense of technology.

[0005] Light sword type headlamp: imitates the shape of a light sword, with LED as the internal light source. The through type daytime running light is combined with different light language to create a strong sense of technology, making it unforgettable at first sight.

[0006] The new features of the split headlamp, through type headlamp and light sword type headlamp are flat and narrow strip type. The air humidity microcirculation in the interior of the headlamp caused by the heat difference of the electrical components and the air vent holes leads to fogging and condensation on the surface of the cold area and the narrow strip type of the headlamp. The traditional headlamp defogging method cannot solve the condensation problem, which seriously affects the appearance of the new model and the safety hazard of the light yellow caused by fogging. INVENTION CONTENTS

[0007] The utility model mainly solves the technical problem of providing a film assembly combined with a graphene carbon heat conduction sheet and a reversible desiccant film sheet for automobile lamp defogging, which can be used in the cycle of headlamp operation and parking, thereby eliminating the fogging phenomenon of new flat and narrow strip type headlamps such as split headlamps, through type headlamps and light sword type headlamps.

[0008] To solve the above technical problems, the utility model adopts one technical scheme: providing a film assembly combined with a graphene carbon heat conduction sheet and a reversible desiccant film sheet for automobile lamp defogging, comprising:

[0009] The graphene carbon heat-conducting sheet layer is arranged on the inner wall of the vehicle lamp shell as a base layer, and includes a heat-absorbing area and a heat-conducting area; the heat-absorbing area is arranged towards a heat-generating element in the vehicle lamp, and is used for absorbing infrared heat; and the heat-conducting area extends from the heat-absorbing area to a cold area prone to fogging, and is used for conducting heat out and defogging.

[0010] The reversible desiccant film layer is arranged in the heat-conducting area, absorbs heat energy and temperature transmitted by the graphene carbon heat-conducting sheet layer, and realizes film micro-moisture desorption drying.

[0011] The reversible desiccant film layer includes a support skeleton layer, a functional layer and active filling; the functional layer is compounded on the surface of the support skeleton layer, and the active filling is embedded in the support skeleton layer; the support skeleton layer is an expanded polytetrafluoroethylene film with a microporous structure; a mist absorber slurry forms the functional layer on the surface of the expanded polytetrafluoroethylene film, and the mist absorber slurry is embedded in the microporous structure to form the active filling.

[0012] In a preferred embodiment of the present application, an ePTFE expanded polytetrafluoroethylene breathable film layer is packaged on the surface of the reversible desiccant film layer.

[0013] In a preferred embodiment of the present application, the packaging includes a single-side covering cap packaging, one side surface of the reversible desiccant film layer is connected with the graphene carbon heat-conducting sheet layer, and the remaining surfaces are connected with the ePTFE expanded polytetrafluoroethylene breathable film layer.

[0014] In a preferred embodiment of the present application, one side surface of the reversible desiccant film layer is connected with the graphene carbon heat-conducting sheet layer through a double-sided pressure-sensitive adhesive sheet.

[0015] In a preferred embodiment of the present application, the packaging includes a cladding packaging, the ePTFE expanded polytetrafluoroethylene breathable film layer is cladded on the whole surface of the reversible desiccant film layer, and the reversible desiccant film layer is connected with the graphene carbon heat-conducting sheet layer through the ePTFE expanded polytetrafluoroethylene breathable film layer.

[0016] In a preferred embodiment of the present application, the ePTFE expanded polytetrafluoroethylene breathable film layer is connected with the graphene carbon heat-conducting sheet layer through a double-sided pressure-sensitive adhesive sheet.

[0017] In a preferred embodiment of the present application, the thickness of the film assembly is 0-3000 microns.

[0018] The film assembly of the present application has the following advantages: under the condition of 40 DEG C and 90% RH, the moisture absorption rate of the film assembly can reach more than 140% of its own weight; under the condition of saturated absorption, more than 130% of moisture can be desorbed in a 35 DEG C environment, and the film assembly has long-term reversible moisture absorption and drying characteristics and can be used in a cycle of absorption and desorption; the use temperature is-60 DEG C-120 DEG C, and the film assembly has excellent weather resistance and temperature resistance.

[0019] By applying the utility model, the heat generated by the electrical elements inside the car light is utilized to realize the moisture absorption and desorption cycle of the reversible desiccant membrane, effectively solve the fogging problem of the novel flat and long strip type car light, and have the advantages of simple structure, low cost, remarkable effect and the like. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0021] Figure 1 It is a structure schematic view of a preferable embodiment of the film assembly of the graphene carbon heat conducting sheet and the reversible desiccant membrane combined for the automobile car light defogging of the utility model;

[0022] Figure 2 It is a structure schematic view of another preferable embodiment of the film assembly of the graphene carbon heat conducting sheet and the reversible desiccant membrane combined for the automobile car light defogging of the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the following will combine the drawings in the embodiments of the utility model, clearly and completely describe the technical solutions in the embodiments of the utility model, and obviously, the described embodiments are some embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0025] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0026] In the description of the utility model, it needs to explain that, the terms "front", "back" and the like indicate the position or location relationship is based on the position or location relationship shown in the drawing, or is the position or location relationship of the utility model product when using the usual place, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, structure and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it also needs to explain that, unless otherwise expressly provided and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] In the utility model, unless otherwise expressly provided and limited, the first feature above or below the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0029] Please refer to Figure 1 The utility model embodiment 1 includes:

[0030] A kind of film assembly of graphene carbon heat conducting sheet and reversible desiccant film piece combination for automobile lamp defogging, comprising:

[0031] Graphene carbon heat conducting sheet layer 1 is arranged on the inner wall of lamp housing 2 as base layer, including heat absorption zone and heat conducting zone, heat absorption zone is arranged towards lamp heating element 3 in vehicle, for absorbing infrared heat, heat conducting zone is extended from heat absorption zone to cold zone prone to fogging, to export heat, used as defogging.The graphene carbon heat conducting sheet used in the utility model has excellent heat conducting performance, light and thin, soft, and specific parameters are shown in the following table:

[0032]

[0033] Reversible desiccant film piece layer 4 is arranged in heat conducting zone, absorbs the heat energy and temperature transferred by graphene carbon heat conducting sheet layer 1 to realize film piece micro moisture desorption drying;

[0034] The reversible desiccant membrane layer 4 comprises a support skeleton layer, a functional layer and active fillers, the functional layer is compounded on the surface of the support skeleton layer, and the active fillers are embedded in the support skeleton layer.

[0035] The working principle is that heat energy and temperature generated by an electric appliance such as a car lamp are transmitted to the reversible desiccant membrane through the graphene carbon heat conduction sheet, so that the moisture-absorbed reversible desiccant membrane desorbs micro water, and the reversible desiccant membrane is in a dry state and has the recycling capacity of moisture absorption again.

[0036] The reversible desiccant membrane layer comprises a support skeleton layer, a functional layer and active fillers, the functional layer is compounded on the surface of the support skeleton layer, and the active fillers are embedded in the support skeleton layer; the support skeleton layer is an expanded polytetrafluoroethylene film with a microporous structure, a mist absorbent slurry forms a functional layer on the surface of the expanded polytetrafluoroethylene film, and the mist absorbent slurry is embedded in the microporous structure to form active fillers.

[0037] The reversible desiccant membrane of the utility model can reach more than 140% of its own weight in moisture absorption rate under the condition of 40 DEG C and 90% RH; in the saturated state, more than 130% can be desorbed in a 35 DEG C environment, has long-term reversible moisture absorption and drying characteristics, and can be recycled in the absorption and desorption; the use temperature is -60 DEG C to 120 DEG C, and excellent weather resistance and temperature resistance are achieved.

[0038] An ePTFE expanded polytetrafluoroethylene air-permeable film layer 5 is packaged on the surface of the reversible desiccant membrane layer 4.

[0039] The micropore diameter of the ePTFE expanded polytetrafluoroethylene air-permeable film is 0.1-30 mu m, there are hundreds of millions of irregular cross-layer intersecting three-dimensional micropore air-permeable gaps per square centimeter, and the material has a large number of, mutually penetrating, from the surface to the inside micropores Figure 1 As shown, a certain air permeability and moisture permeability are achieved.

[0040] The packaging is a single-side covering cover type packaging, one side surface of the reversible desiccant membrane layer 4 is connected with the graphene carbon heat conduction sheet layer 1, and the remaining surfaces are connected with the ePTFE expanded polytetrafluoroethylene air-permeable film layer 5.

[0041] One side surface of the reversible desiccant membrane layer 4 is connected with the graphene carbon heat conduction sheet layer 1 through the double-sided pressure-sensitive adhesive sheet 6.

[0042] The specific preparation method of the membrane assembly comprises the following steps:

[0043] (1) preparing materials, including: reversible desiccant membrane, graphene carbon heat conduction sheet, double-sided pressure-sensitive adhesive sheet and ePTFE expanded polytetrafluoroethylene film;

[0044] (2) Die cutting processing is carried out on the above materials, and reversible desiccant film pieces, graphene carbon heat conduction pieces and double-sided pressure-sensitive adhesive pieces of required sizes are respectively processed;

[0045] (3) The reversible desiccant film pieces are bonded and connected with the graphene carbon heat conduction pieces by using the pressure-sensitive adhesive pieces;

[0046] (4) The reversible desiccant film pieces are covered and packaged by using ePTFE expanded polytetrafluoroethylene film;

[0047] (5) The pressure-sensitive adhesive piece strips with release paper are bonded on the back of the graphene carbon heat conduction piece;

[0048] (6) Code spraying is carried out on the packaging surface of the ePTFE expanded polytetrafluoroethylene film;

[0049] (7) The packaged component is vacuumized and packaged;

[0050] (8) The packaged component is inspected, and is stored in the warehouse after the inspection is qualified.

[0051] Referring to Figure 2 , the embodiment 2 of the utility model comprises:

[0052] A film assembly of a graphene carbon heat conduction piece and a reversible desiccant film piece combined for defogging of an automobile lamp, comprising:

[0053] The graphene carbon heat conduction piece layer 1 is arranged on the inner wall of the lamp shell 2 as a base layer, comprises a heat absorption area and a heat conduction area, the heat absorption area is arranged towards the heat generating element 3 in the lamp, is used for absorbing infrared heat, and the heat conduction area is extended from the heat absorption area to the cold area prone to fogging to form and export heat, and is used for defogging. The graphene carbon heat conduction piece adopted by the utility model has excellent heat conduction performance, is light, thin and soft, and specific parameters are shown in the following table:

[0054]

[0055] The reversible desiccant film piece layer 4 is arranged in the heat conduction area, absorbs heat energy and temperature transmitted by the graphene carbon heat conduction piece layer 1 and realizes film piece micro-water desorption drying.

[0056] The working principle is that heat energy and temperature generated by an electric appliance such as a lamp are transmitted to the reversible desiccant film piece through the graphene carbon heat conduction piece, so that the reversible desiccant film piece that has absorbed moisture desorbs micro-water, so that the reversible desiccant film piece is in a dry state and has the recycling ability of absorbing moisture again.

[0057] The reversible desiccant film piece layer 4 comprises a support skeleton layer, a functional layer and active fillers, the functional layer is compounded on the surface of the support skeleton layer, and the active fillers are embedded in the support skeleton layer;

[0058] The reversible desiccant membrane sheet comprises a support skeleton layer, a functional layer and an active filling, the functional layer is compounded on the surface of the support skeleton layer, and the active filling is embedded in the support skeleton layer; the support skeleton layer is an expanded polytetrafluoroethylene film with a microporous structure, a mist adsorbent slurry forms the functional layer on the surface of the expanded polytetrafluoroethylene film, and the mist adsorbent slurry is embedded in the microporous structure to form the active filling.

[0059] The reversible desiccant membrane sheet can reach more than 140% of its own weight in moisture absorption rate under the condition of 40 DEG C and 90% RH, and can desorb more than 130% under the condition of saturated absorption in a 35 DEG C environment, has long-term reversible moisture absorption and drying characteristics, and can be used in absorption and desorption cycles; the use temperature is-60 DEG C to 120 DEG C, and the reversible desiccant membrane sheet has excellent weather resistance and temperature resistance.

[0060] An ePTFE expanded polytetrafluoroethylene air-permeable film layer 5 is packaged on the surface of the reversible desiccant membrane sheet layer 4.

[0061] The micropore diameter of the ePTFE expanded polytetrafluoroethylene air-permeable film is 0.1-30 mu m, there are hundreds of millions of irregular cross-layer intersecting three-dimensional microporous air-permeable gaps per square centimeter, and the material has a large number of interpenetrating micropores from the surface to the interior Figure 1 As shown, the ePTFE expanded polytetrafluoroethylene air-permeable film has certain air permeability and moisture permeability.

[0062] The packaging is cladding packaging, the ePTFE expanded polytetrafluoroethylene air-permeable film layer 5 is cladded on the whole surface of the reversible desiccant membrane sheet layer 4, and the reversible desiccant membrane sheet layer 4 is connected with the graphene carbon heat-conducting sheet layer 1 through the ePTFE expanded polytetrafluoroethylene air-permeable film layer 5.

[0063] The ePTFE expanded polytetrafluoroethylene air-permeable film layer 5 is connected with the graphene carbon heat-conducting sheet layer 1 through the double-sided pressure-sensitive adhesive sheet 6.

[0064] The specific preparation method of the membrane assembly comprises the following steps:

[0065] (1) preparing materials, including: a reversible desiccant membrane sheet, a graphene carbon heat-conducting sheet, a double-sided pressure-sensitive adhesive sheet and an ePTFE expanded polytetrafluoroethylene film;

[0066] (2) die cutting the above-mentioned materials to process the reversible desiccant membrane sheet, the graphene carbon heat-conducting sheet and the double-sided pressure-sensitive adhesive sheet into the required sizes respectively;

[0067] (4) cladding packaging the reversible desiccant membrane sheet using the ePTFE expanded polytetrafluoroethylene film;

[0068] (3) bonding and connecting the ePTFE expanded polytetrafluoroethylene film and the graphene carbon heat-conducting sheet using the pressure-sensitive adhesive patch;

[0069] (5) The strip of pressure-sensitive adhesive tape of the release paper is bonded to the back of the graphene carbon heat-conducting sheet;

[0070] (6) The code is sprayed on the packaging surface of the ePTFE expanded polytetrafluoroethylene film;

[0071] (7) The completed component is vacuum-packed;

[0072] (8) The packaged component is inspected, and is stored in the warehouse after passing the inspection.

[0073] The thickness of the film assembly of the embodiment 1-2 is 0-3000 μm.

[0074] The film assembly of the graphene carbon heat-conducting sheet and the reversible desiccant film is applied to the de-fogging of the automobile lamp, and the film assembly is bonded to the inner wall of the flat and narrow strip-shaped lamp shell of the split headlamp, the through headlamp and the light sword headlamp by the double-sided pressure-sensitive adhesive tape 6.

[0075] The reversible desiccant film absorbs the micro-moisture in the cold air, reduces the humidity in the new flat and narrow strip-shaped shell and eliminates the fogging phenomenon. With the working of the lamp, the heat energy and temperature absorbed by the graphene carbon heat-conducting sheet are rapidly transmitted to the reversible desiccant film. The reversible desiccant film starts to desorb the moisture under the action of the heat energy and temperature provided by the graphene carbon heat-conducting sheet. The desorbed moisture is carried away by the micro-circulation airflow in the lamp, which reduces the humidity in the new flat and narrow strip-shaped shell and eliminates the fogging phenomenon. On the other hand, the reversible desiccant film restores the ability to dry and absorb moisture. The film assembly can be used in the cycle of working and parking of the lamp, thereby eliminating the fogging phenomenon of the flat and narrow strip-shaped lamp such as the split headlamp, the through headlamp and the light sword headlamp.

[0076] The film assembly is also applied to the small space of the intelligent helmet display, the monitoring probe, the image detection and the laser radar detection sensor, eliminates the fogging phenomenon in the small space, effectively plays the electrical performance and more reliably works.

[0077] The film assembly is combined with the CMD condensation controller and applied to the lamp shell, and a better de-fogging effect can be achieved.

[0078] The film assembly of the graphene carbon heat-conducting sheet and the reversible desiccant film for the de-fogging of the automobile lamp has an extremely thin thickness and can adapt to the narrow internal space of the new flat and narrow strip-shaped lamp such as the split headlamp, the through headlamp and the light sword headlamp. The ultra-thin design significantly shortens the design verification and development cycle of the new energy automobile lamp, enables the new lamp to be quickly pushed to the market and meets the needs of consumers for fashion and avant-garde design.

[0079] The film assembly is low in cost, can be used in combination with a car lamp air permeable film assembly and a CMD condensation controller in application, and further improves the defogging effect.

[0080] The film assembly effectively reduces the humidity inside the car lamp, eliminates the fogging phenomenon, and thus ensures stable performance of the car lamp.

[0081] The film assembly does not need to change the internal structure and layout of the new energy automobile car lamp that has been designed for mass production, and can be directly applied to the existing car lamp system.

[0082] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A film assembly of graphene carbon heat conducting sheet combined with reversible desiccant film sheet for defogging of automotive vehicle lamp, characterized in that, The application relates to a graphene carbon heat-conducting sheet layer, which is arranged on the inner wall of a vehicle lamp shell as a base layer and comprises a heat-absorbing area and a heat-conducting area; the heat-absorbing area is arranged towards a heat-generating element in the vehicle lamp and is used for absorbing infrared heat; the heat-conducting area is formed by extending from the heat-absorbing area to a cold area prone to fogging and is used for conducting heat out and removing fog. A reversible desiccant film layer is arranged in the heat-conducting area and absorbs heat energy and temperature transmitted by the graphene carbon heat-conducting sheet layer to realize film micro-moisture desorption drying. The reversible desiccant film layer comprises a support skeleton layer, a functional layer and active filling; the functional layer is compounded on the surface of the support skeleton layer, and the active filling is embedded in the support skeleton layer. The support skeleton layer is an expanded polytetrafluoroethylene film with a microporous structure; a mist absorbent slurry is formed into a functional layer on the surface of the expanded polytetrafluoroethylene film, and the mist absorbent slurry is embedded in the microporous structure to form the active filling. An ePTFE (expanded polytetrafluoroethylene) breathable film layer is encapsulated on the surface of the reversible desiccant film layer.

2. The film assembly of claim 1, wherein the graphene-based carbon heat-conducting sheet for defogging of an automobile lamp is combined with a reversible desiccant film sheet, and the graphene-based carbon heat-conducting sheet for defogging of an automobile lamp is characterized by, The encapsulation comprises single-side covering cap encapsulation; one side surface of the reversible desiccant film layer is connected with the graphene carbon heat-conducting sheet layer, and the other surfaces are connected with the ePTFE breathable film layer.

3. The film assembly of claim 2, wherein the graphene-based carbon heat-conducting sheet for defogging of an automobile lamp is combined with the reversible desiccant film sheet. One side surface of the reversible desiccant film layer is connected with the graphene carbon heat-conducting sheet layer through double-sided pressure-sensitive adhesive sheets.

4. The film assembly of claim 3, wherein the graphene-based carbon heat-conducting sheet for defogging of an automobile lamp is combined with the reversible desiccant film sheet. The encapsulation comprises coating encapsulation; the ePTFE breathable film layer is coated on the whole surface of the reversible desiccant film layer, and the reversible desiccant film layer is connected with the graphene carbon heat-conducting sheet layer through the ePTFE breathable film layer.

5. The membrane assembly of the graphene carbon thermal conductive sheet and reversible desiccant membrane for automotive headlight defogging according to claim 2, characterized in that, The ePTFE breathable film layer is connected with the graphene carbon heat-conducting sheet layer through double-sided pressure-sensitive adhesive sheets.

6. The film assembly of claim 5, wherein the graphene-based carbon heat-conducting sheet for defogging of an automobile lamp is combined with the reversible desiccant film sheet. The thickness of the film assembly is 0-3000 microns.

7. The graphene carbon heat conducting sheet for defogging of automotive vehicle lamp in combination with a membrane assembly of reversible desiccant membrane sheet as claimed in claim 1 wherein, ​

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