Skylight sunshade curtain device based on graphene material and vehicle

Abstract

The invention relates to the technical field of vehicle sunroofs, in particular to a sunroof sunshade curtain device based on a graphene material and a vehicle. In the curled storage state, the sunshade curtain is curled on the reel, and the surface layer curled on the reel is extruded and is close to the graphene heating and heat preservation module layer, so that the cavity is switched to the compression state; when the temperature difference exists between the passenger compartment and the environment outside the automobile, and the temperature of the environment outside the automobile is lower, the sunshade curtain can be switched to the unfolded and tiled state, the graphene heating and heat preservation module layer is started, and the graphene heating and heat preservation module layer can be switched to the unfolded and tiled state, so that the sunshade curtain is unfolded, the surface layer is separated from the graphene heating and heat preservation module layer, and the cavity is switched to the unfolded and tiled state. And therefore, the heat preservation effect of the sunshade curtain on heat in the automobile is improved, and the loss of the heat of a passenger compartment from the skylight is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle sunroofs, and in particular to a sunroof sunshade device based on graphene materials and a vehicle. Background Art

[0002] With the rapid development of the automotive industry and consumers' increasing demands for vehicle comfort and energy efficiency, the control of the vehicle's internal environment has become an important design consideration. As a common element in modern car design, the skylight not only provides good lighting and ventilation, but also brings new challenges of heat preservation and insulation. Especially in extreme weather conditions, such as cold winters and hot summers, the skylight area often becomes the main channel for temperature loss in the car or external heat intrusion.

[0003] For electric vehicles, the vehicle's thermal insulation performance in the cold winter determines the heating power consumption of the electric vehicle, so good vehicle thermal insulation performance is of great significance to improving vehicle endurance. However, electric vehicles in the prior art do not perform active heating and thermal insulation treatment on the sunshade, but rely on a single-structure sunshade to achieve thermal insulation, which is difficult to effectively prevent the rapid exchange of the temperature inside the vehicle with the external environment, resulting in low efficiency in controlling the environment inside the vehicle, increasing the burden on the vehicle's air conditioning system, and thus affecting the vehicle's energy consumption and the comfort of the passengers. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a sunroof sunshade device and a vehicle based on graphene material, which solves the technical problem of poor thermal insulation effect of the sunroof sunshade in the prior art.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, the present invention provides a sunroof sunshade device based on graphene material, comprising a roller and a sunshade; the sunshade comprises a graphene heating and thermal insulation module layer and a surface layer, the graphene heating and thermal insulation module layer is capable of generating heat, and a cavity facing the passenger compartment is formed between the surface layer and the graphene heating and thermal insulation module layer; wherein the sunshade is capable of switching between a rolled-up storage state and an unfolded and laid-flat state, and the cavity is capable of switching between a compressed state and an extended state; in the rolled-up storage state, the sunshade is rolled up on the roller, and the surface layer rolled up on the roller is squeezed and approaches the graphene heating and thermal insulation module layer, so that the cavity is switched to a compressed state; in the unfolded and laid-flat state, the sunshade is unfolded, and the surface layer and the graphene heating and thermal insulation module layer are separated from each other, so that the cavity is switched to an extended state.

[0009] In a second aspect, the present invention provides a vehicle, comprising a sunroof sunshade device based on graphene material in the above technical solution, wherein the sunshade device is supported at a corresponding position of a sunroof of the vehicle.

[0010] (III) Beneficial effects

[0011] The beneficial effects of the present invention are as follows: the graphene-based skylight sunshade device of the present invention has a cavity that can be compressed when the sunshade is rolled up and expanded when the sunshade is unfolded. Therefore, when the sunshade is switched to the rolled up and stored state, the existence of the cavity will hardly affect its structural compactness. When the sunshade is switched to the unfolded and laid state, the expanded cavity serves as an insulating cavity to play a role in heat insulation. In addition, it can also cooperate with the actively heated graphene heating and heat preservation module layer to store heat in the cavity to form a heat barrier, thereby further improving the heat preservation effect.

[0012] When there is a temperature difference between the passenger compartment and the outside environment, and the outside environment temperature is lower, the sunshade can be switched to the unfolded and laid state, and the graphene heating and insulation module layer can be started to form a higher temperature insulation cavity in the cavity, thereby improving the sunshade's insulation effect on the heat inside the car and reducing the heat loss from the passenger compartment through the sunroof.

[0013] In summer, when the vehicle temperature is lower than the outside temperature, the sunshade can also be switched to the unfolded and laid state, and the graphene heating and insulation module layer can be turned off, so that the cavity simply forms an insulation cavity, thereby improving the heat insulation effect of the sunshade and reducing the loss of cold in the passenger compartment from the skylight. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a skylight sunshade device based on graphene material according to the present invention;

[0015] Figure 2 It is a structural schematic diagram of the sunshade curtain of the present invention;

[0016] Figure 3 It is a schematic cross-sectional structure diagram of the sunshade curtain of the present invention when it is in an unfolded and laid-flat state;

[0017] Figure 4 It is a schematic cross-sectional structure diagram of the sunshade curtain of the present invention when it is in a rolled-up storage state;

[0018] Figure 5 This is a schematic diagram of the structure of the graphene heating and heat preservation module layer of the present invention;

[0019] Figure 6 Schematic diagram of the structure of the graphene structure layer of the present invention;

[0020] Figure 7 For the present invention Figure 1A schematic diagram of the local enlarged structure at the X in the middle;

[0021] Figure 8 For the present invention Figure 1 Schematic diagram of the local enlarged structure at Y in the middle.

[0022] [Description of Reference Numerals]

[0023] 1: Scroll;

[0024] 2: sunshade; 21, graphene heating and insulation module layer; 22, surface layer; A, cavity; 23, first slide bar; 24, second slide bar; 25, rubber seal; 26, flexible diaphragm;

[0025] 211, first substrate layer; 212, thermal insulation cotton layer; 213, graphene structure layer;

[0026] 2131, reflective layer; 2132, second substrate layer; 2133, graphene layer;

[0027] 3: first track;

[0028] 4: Second track;

[0029] 5: Positive pressure module; B, air outlet. DETAILED DESCRIPTION

[0030] In order to better explain the present invention, so as to facilitate understanding, the following Figure 1-Figure 8 The present invention is described in detail through specific implementation methods. The "width direction" mentioned herein is Figure 1 The front-to-back direction in the “length direction” is Figure 1 The left and right direction in .

[0031] Embodiment 1:

[0032] Reference Figure 1-Figure 4 An embodiment of the present invention provides a sunroof sunshade device based on graphene material, comprising a roller 1 and a sunshade 2; the sunshade 2 comprises a graphene heating and thermal insulation module layer 21 and a surface layer 22, the graphene heating and thermal insulation module 21 layer can generate heat, and a cavity A facing the passenger compartment is formed between the surface layer 22 and the graphene heating and thermal insulation module layer 21; wherein the sunshade 2 can switch between a rolled-up storage state and an unfolded and laid state, and the cavity A can switch between a compressed state and an extended state; in the rolled-up storage state, the sunshade 2 is rolled up on the roller 1, and the surface layer 22 rolled up on the roller 1 is squeezed and close to the graphene heating and thermal insulation module layer 21, so that the cavity A is switched to a compressed state; in the unfolded and laid state, the sunshade 2 is unfolded, and the surface layer 22 is separated from the graphene heating and thermal insulation module layer 21, so that the cavity A is switched to an extended state.

[0033] In this embodiment, the roller 1 serves as a storage and unfolding mechanism for the sunshade 2, which is convenient for the user to adjust the shading state of the skylight according to weather and light conditions. In addition, a driving mechanism for opening and closing the sunshade 2 is provided on the roller 1. The roller 1 is driven to rotate by a rotating driving member, and the sunshade 2 is driven to open and close synchronously by a pull wire and a guide wheel, which will not be elaborated here.

[0034] The graphene heating and heat preservation module layer 21 utilizes the excellent thermal conductivity and heat preservation properties of graphene to provide additional warmth when needed, especially in cold weather, and can effectively reduce the heat loss in the car. As the outer surface of the sunshade 2, it plays a role in protecting the graphene heating and heat preservation module layer 21 and also plays a certain decorative role.

[0035] The cavity A formed between the surface layer 22 and the graphene heating and heat-insulating module layer 21 provides a certain heat-insulating space when the sunshade 2 is unfolded, thereby enhancing the sunshade and heat-insulating effects. At the same time, the cavity A can be compressed when the sunshade 2 is rolled up, so it will hardly affect the compactness of the structure of the sunshade 2 when it is in the rolled up state, so that the sunshade 2 is still suitable for the vehicle roof space.

[0036] Since the present invention has a cavity A that can be compressed when the sunshade 2 is curled and expand when the sunshade 2 is unfolded, when the sunshade 2 is switched to the curled and stored state, the existence of cavity A will hardly affect the compactness of its structure. When the sunshade 2 is switched to the unfolded and laid state, the expanded cavity A acts as an insulating cavity to provide heat insulation and heat preservation. In addition, it can also cooperate with the actively heated graphene heating and heat preservation module layer 21 to store heat in cavity A to form a heat barrier, thereby further improving the heat preservation effect.

[0037] In this way, when there is a temperature difference between the passenger compartment and the outside environment, and the temperature outside the vehicle is lower, the sunshade 2 can be switched to the unfolded and laid state, and the graphene heating and insulation module layer 21 can be started to form a higher temperature insulation cavity in cavity A, thereby improving the insulation effect of the sunshade 2 on the heat inside the vehicle and reducing the heat loss from the passenger compartment through the sunroof.

[0038] In summer, when the vehicle temperature is lower than the outside temperature, the sunshade 2 can also be switched to the unfolded and laid state, and the graphene heating and insulation module layer 21 can be turned off, so that the cavity A simply forms an insulation cavity, thereby improving the heat insulation effect of the sunshade 2 and reducing the loss of cold in the passenger compartment from the skylight.

[0039] Embodiment 2:

[0040] Reference Figure 5 and Figure 6 In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0041] The graphene heating and insulation module layer 21 includes a first substrate layer 211, a thermal insulation cotton layer 212 and a graphene structure layer 213 which are arranged in sequence. The first substrate layer 211, the thermal insulation cotton layer 212 and the graphene structure layer 213 are compounded with each other, and a cavity A facing the passenger compartment is formed between the surface layer 22 and the graphene structure layer 213; the graphene structure layer 213 includes a reflective layer 2131, a second substrate layer 2132 and a graphene layer 2133 which are compounded in sequence, and the graphene layer 2133 faces the passenger compartment.

[0042] In this embodiment, the graphene heating and heat preservation module layer 21 is composed of multiple layers in sequence, including a first substrate layer 211, a heat preservation cotton layer 212, a graphene structure layer 213 and a surface layer 22. These layers are combined with each other to form a module layer with heating and heat preservation functions.

[0043] The first substrate layer 211 serves as the bottom support of the module and provides a stable structural foundation for the entire module.

[0044] The heat-insulating cotton layer 212 is located on the first substrate layer 211 and plays a role in heat insulation and heat preservation. The heat-insulating cotton layer 212 can effectively reduce heat loss and improve the heat-insulating effect of the module.

[0045] The graphene structure layer 213 is composed of a reflective layer 2131, a second substrate layer 2132 and a graphene layer 2133, which are compounded in sequence. The reflective layer 2131 is located at the bottom layer of the graphene structure layer 213, and can reflect the heat generated by the graphene layer 2133 back to the passenger compartment to improve the utilization rate of heat. The second substrate layer 2132 serves as a support and protective layer for the graphene layer 2133 to ensure the stability and safety of the graphene layer 2133. The graphene layer 2133 faces the passenger compartment and is the main part that generates heat. With its excellent thermal and electrical conductivity, graphene can quickly convert electrical energy into thermal energy to provide warmth for the passenger compartment. A cavity A facing the passenger compartment is formed between the surface layer 22 and the graphene structure layer 213.

[0046] The graphene heating and heat preservation module layer 21 realizes the dual functions of heating and heat preservation through multiple layers of compounding. Among them, the graphene layer 2133 provides warmth to the passenger compartment with its excellent performance; the design of the reflective layer 2131, the heat preservation cotton layer 212 and the cavity A further improves the heat preservation effect of the module. The entire module layer has a compact structure and powerful functions, and is a new solution for sunshade of automobile sunroofs.

[0047] Embodiment 3:

[0048] Reference Figure 1 , Figure 3 and Figure 7 In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0049] The skylight sunshade device based on graphene material also includes two groups of first rails 3 and two groups of second rails 4, and the first planes where the two groups of first rails 3 are located are parallel to the second planes where the two groups of second rails 4 are located; an installation area for the sunshade 2 is formed between the two groups of first rails 3 and between the two groups of second rails 4; both sides of the graphene heating and insulation module layer 21 and the surface layer 22 in the width direction are correspondingly slidably connected in the first rails 3 and the second rails 4; wherein a specific distance is reserved between the first plane and the second plane, so that when the graphene heating and insulation module layer 21 and the surface layer 22 are slidably connected to the corresponding first rails 3 and the second rails 4, the surface layer 22 and the graphene structure layer 213 at the corresponding position are separated to switch the cavity A to the expanded state.

[0050] In this embodiment, the sunshade 2 is slidably connected in the installation area to realize the unfolding and folding functions of the sunshade 2. The graphene heating and insulation module layer 21 and the surface layer 22 are slidably connected in the first track 3 and the second track 4 on both sides in the width direction. This sliding connection mode enables the sunshade 2 to move smoothly along the track, realizing the adjustment of the sunshade effect.

[0051] A specific distance is reserved between the first plane and the second plane. When the graphene heating and insulation module layer 21 and the surface layer 22 are slidably connected to the corresponding first track 3 and the second track 4, due to the existence of the fault, the surface layer 22 will be separated from the graphene structure layer 213 at the corresponding position, thereby ensuring that a cavity A can be formed between the two.

[0052] When the sunshade 2 does not slide or slides to a specific position, the surface layer 22 and the graphene structure layer 213 are close to each other, and the cavity A is in a compressed state. When the surface layer 22 is separated from the graphene structure layer 213 due to the step design, the cavity A switches to an expanded state. The expanded cavity A provides a larger heat-insulating space, thereby enhancing the heat-insulating effect of the sunshade 2.

[0053] In summary, the sunroof sunshade device based on graphene material achieves smooth sliding of the sunshade 2 and switching of the cavity A state by utilizing the step difference mechanism of the first track 3 and the second track 4.

[0054] Specifically, refer to Figure 1 When the sunshade 2 slides from left to right, the sunshade will gradually curl up and be stored on the reel 1, thereby switching the cavity A to a compressed state.

[0055] Embodiment 4:

[0056] Reference Figure 1 , Figure 3 , Figure 4 and Figure 7In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0057] The sunshade 2 also includes two groups of first slide bars 23 and two groups of second slide bars 24. The two groups of first slide bars 23 are supported and the two groups of second slide bars 24 are supported at the two ends of the graphene heating and insulation module layer 21 and the surface layer 22 in the width direction respectively. The two groups of first slide bars 23 and the two groups of second slide bars 24 are correspondingly slidably connected in the two groups of first rails 3 and the second rails 4.

[0058] In this embodiment, when the sunshade 2 is switched to the unfolded and laid state, the first slide bar 23 and the second slide bar 24 corresponding to the unfolded part of the sunshade 2 are slidably connected with the corresponding first track 3 and the second track 4. Since a specific distance is reserved between the first track 3 and the second track 4, it is ensured that an expanded cavity A is formed between the surface layer 22 and the graphene heating and insulation module layer 21.

[0059] Specifically, the graphene heating and insulation module and both ends of the surface layer 22 in the width direction are connected with side rubber seals 25. The first sliding bar 23 and the second sliding bar 24 are an integrated structure with the corresponding side rubber seals 25 to ensure that they can establish a sliding connection relationship with the corresponding first rail 3 and second rail 4, and can also curl synchronously when the sunshade 2 is switched to the curled and stored state.

[0060] Embodiment 5:

[0061] Reference Figure 1 and Figure 8 In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0062] The skylight sunshade device based on graphene material also includes a positive pressure module 5, which includes a flat air outlet B; a cavity A along the length direction of the sunshade 2 and away from the end of the roller 1 is open, and when the sunshade 2 is switched to the unfolded and laid state, the air outlet B is connected to the open side of the cavity A; air outlet holes are distributed on the surface layer 22, and in the curled and stored state, the positive pressure module 5 works so that the air outlet B outputs positive pressure, and then the air outlet holes output air.

[0063] In this embodiment, the positive pressure module 5 is a newly added module in the sunshade device, including a flat air outlet B for outputting positive pressure air. When the sunshade 2 is switched to the unfolded and laid state, the open side of the cavity A is exposed, the positive pressure module 5 starts to work, and the air outlet B outputs positive pressure air, which is transferred to the air outlet holes on the surface layer 22 through the cavity A, allowing the positive pressure air to be output from the air outlet holes to the passenger compartment. When the graphene heating layer is powered on and heated, a part of the heat will be stored in the cavity A and gradually accumulated. Through the positive pressure module 5, the hot air in the cavity A can be output to the passenger compartment through the air outlet holes, and the head position of the occupant is directly heated by heat conduction, thereby improving the riding comfort of the vehicle in cold seasons.

[0064] The main mode of the graphene heating layer is far-infrared radiation, which will have a certain therapeutic effect on the occupants and improve the comfort of use; and, under the action of the positive pressure module 5, the heat conducted by the graphene heating layer is also fully utilized. At the same time, even if the air in cavity A flows, it can maintain a certain temperature under the heating effect of the graphene heating layer. Therefore, the reduction in the thermal insulation capacity of cavity A is almost negligible.

[0065] In a hot environment, the positive pressure module 5 can also start working, thereby generating a breeze above the occupants' heads to improve riding comfort.

[0066] The sunshade 2 further includes two groups of flexible membranes 26 , which are respectively arranged at two ends of the cavity A in the width direction and connect the graphene heating and heat preservation module layer 21 and the surface layer 22 .

[0067] Flexible diaphragms 26 made of rubber material may also be provided at both ends of the graphene heating and heat preservation module layer 21 and the surface layer 22 in the width direction. The flexible diaphragms 26 made of rubber material connect the upper and lower rubber seals 25, so that the outlet of the cavity A in the width direction can be closed;

[0068] The outlet of cavity A in the length direction is naturally closed on the side close to the scroll 1, and the outlet on the side away from the scroll 1 is the opening of cavity A. This part is closed by the positive pressure module 5. Even if there is a gap between the positive pressure module 5 and the opening, the gap is small and much smaller than the air flow of the air holes on the surface layer 22. Therefore, the gap here can be ignored.

[0069] Furthermore, even if the flexible diaphragm 26 made of rubber is not provided, the openings on both sides of the cavity A in the width direction can be closed by providing the first rail 3 and the second rail 4 as an integral structure.

[0070] The surface layer 22 is a woven layer, and the air outlet is set as the mesh of the surface layer 22. The surface layer 22 adopts a woven layer design, that is, the surface layer 22 is composed of interwoven lines or fibers, forming a structure with certain elasticity and air permeability. The design of the woven layer not only enhances the durability and tear resistance of the surface layer 22, but also provides it with good air permeability, ensuring that air can be output from the mesh to the passenger compartment.

[0071] The positive pressure module 5 is supported at one end of the track away from the reel 1, and when the sunshade 2 is switched to the unfolded and flat state, the air outlet B can be inserted into the cavity A. This arrangement can separate the supporting structure of the positive pressure module 5 from the sunshade 2 to improve the convenience of arranging the supporting structure, and can also improve the convenience of setting the power supply harness of the positive pressure module 5.

[0072] Specifically, the positive pressure module 5 includes multiple fans inside and motors that drive the fans to rotate. The fans are distributed along the front and rear extension direction of the positive pressure module 5 and can output long strips of wind that match the shape of cavity A.

[0073] Embodiment 6:

[0074] In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0075] The graphene-based sunroof curtain device further includes a temperature control module, which is connected to the graphene structure layer 213 to control the temperature of the graphene structure layer 213 according to the temperature feedback of the passenger compartment.

[0076] In this embodiment, the temperature control module intelligently adjusts the heating power of the graphene structure layer 213 according to the temperature feedback of the passenger compartment through the built-in sensor and control system, thereby controlling its temperature.

[0077] When the temperature of the passenger compartment is low, the temperature control module will increase the heating power of the graphene structure layer 213 to quickly increase the temperature in the cabin and improve the heat preservation capacity. When the temperature of the passenger compartment reaches the set value or is too high, the temperature control module will reduce or turn off the heating power of the graphene structure layer 213 to prevent overheating.

[0078] The intelligent control function of the temperature control module not only improves the comfort of the sunshade 2, but also achieves energy saving effect. By accurately controlling the temperature of the graphene structure layer 213, unnecessary energy waste is avoided.

[0079] Embodiment 7:

[0080] In addition to providing a vehicle, an embodiment of the present invention includes a sunroof sunshade device based on graphene material in any of the above embodiments, and the sunshade device is supported at a corresponding position of the sunroof of the vehicle to open or cover the sunroof. Therefore, the vehicle includes all the beneficial effects of any of the above embodiments, which will not be described here to avoid repetition.

[0081] It can be understood that, except for any conflicting parts, the above-mentioned embodiments 1-7 can be freely combined to form other implementation modes of the present invention.

[0082] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0085] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0086] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A skylight sunshade device based on graphene material, characterized in that: It comprises a reel (1) and a sunshade (2); The sunshade (2) comprises a graphene heating and heat preservation module layer (21) and a surface layer (22); the graphene heating and heat preservation module layer (21) is capable of generating heat, and a cavity (A) is formed between the surface layer (22) and the graphene heating and heat preservation module layer (21); The sunshade (2) can be switched between a rolled-up state and an unfolded state, and the cavity (A) can be switched between a compressed state and an expanded state. In the rolled up storage state, the sunshade (2) is rolled up on the reel (1), and the surface layer (22) rolled up on the reel (1) is squeezed and brought close to the graphene heating and heat preservation module layer (21), so that the cavity (A) switches to the compressed state; In the unfolded and laid-flat state, the sunshade curtain (2) is unfolded, and the surface layer (22) and the graphene heating and heat-insulating module layer (21) are separated from each other, so that the cavity (A) is switched to the expanded state.

2. The skylight sunshade device based on graphene material according to claim 1, characterized in that: The graphene heating and heat-insulating module layer (21) comprises a first substrate layer (211), a heat-insulating cotton layer (212), and a graphene structural layer (213) which are compositely arranged in sequence, and the cavity (A) is formed between the surface layer (22) and the graphene structural layer (213); The graphene structure layer (213) comprises a reflective layer (2131), a second substrate layer (2132) and a graphene layer (2133) which are compounded in sequence, and the graphene layer (2133) faces the cavity (A).

3. The skylight sunshade device based on graphene material as claimed in claim 2, characterized in that: It also comprises two groups of first rails (3) and two groups of second rails (4), wherein the first planes where the two groups of first rails (3) are located are parallel to the second planes where the two groups of second rails (4) are located; and the installation area of ​​the sunshade (2) is formed between the two groups of first rails (3) and between the two groups of second rails (4); Both sides of the graphene heating and heat preservation module layer (21) and the surface layer (22) in the width direction are correspondingly slidably connected in the first track (3) and the second track (4); A specific distance is reserved between the first plane and the second plane so that when the graphene heating and heat preservation module layer (21) and the surface layer (22) are slidably connected to the corresponding first track (3) and the second track (4), the surface layer (22) and the graphene structure layer (213) at corresponding positions are separated, thereby switching the cavity (A) to the expanded state.

4. The skylight sunshade device based on graphene material as claimed in claim 3, characterized in that: The sunshade (2) further comprises two groups of first slide bars (23) and two groups of second slide bars (24), wherein the two groups of the first slide bars (23) are supported and the two groups of the second slide bars (24) are supported at two ends of the graphene heating and heat preservation module layer (21) and the surface layer (22) in a width direction, respectively, and the two groups of the first slide bars (23) and the two groups of the second slide bars (24) are correspondingly slidably connected in the two groups of the first rails (3) and the second rails (4).

5. The skylight sunshade device based on graphene material as claimed in claim 4, characterized in that: It also comprises a positive pressure module (5), the positive pressure module (5) comprising a flat air outlet (B); the cavity (A) along the length direction of the sunshade (2) and at one end away from the rolling shaft (1) is open, and when the sunshade (2) is switched to the unfolded and laid state, the air outlet (B) is communicated with the open side of the cavity (A); The surface layer (22) is provided with air outlet holes. In the curled storage state, the positive pressure module (5) works so that the air outlet (B) outputs positive pressure, thereby causing the air outlet holes to output air.

6. The skylight sunshade device based on graphene material as claimed in claim 5, characterized in that: The sunshade (2) further comprises two groups of flexible membranes (26), which are respectively arranged at two ends of the cavity (A) in the width direction and connect the graphene heating and heat preservation module layer (21) and the surface layer (22).

7. The skylight sunshade device based on graphene material as claimed in claim 5, characterized in that: The surface layer (22) is a woven layer, and the air outlet holes are arranged as mesh holes of the surface layer (22).

8. The skylight sunshade device based on graphene material according to any one of claims 1 to 7, characterized in that: It also comprises a temperature control module, which is connected to the graphene heating and thermal insulation module layer (21) so as to control the temperature of the graphene heating and thermal insulation module layer (21) according to the temperature feedback of the passenger compartment.

9. A vehicle, characterized in that: It comprises a sunroof shade device based on graphene material as described in any one of claims 1 to 8, wherein the sunroof shade device is supported at a corresponding position of the sunroof of the vehicle.

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