Optical device and facade photovoltaic panel

Abstract

The utility model discloses an optical device and a photovoltaic panel for a vertical face, the optical device comprises a light guide plate, a convex lens, a concave mirror and a packaging structure, and the light guide plate is used for uniformly diffusing and projecting collected solar rays to a photovoltaic module for the vertical face; the convex lens is arranged on the side, away from the vertical face photovoltaic assembly, of the light guide plate and used for converging the solar rays to the light guide plate. The concave mirror is arranged between the light guide plate and the convex lens and is used for reflecting the deviated solar rays to the surface of the convex lens, and the deviated solar rays are converged by the convex lens to form solar beams and then enter the light guide plate; the packaging structure is fixed to the side, away from the photovoltaic assembly for the vertical face, of the light guide plate and provided with a transparent cavity, the convex lens and the concave mirror are packaged in the transparent cavity, and therefore the packaging structure can adapt to light incident angles of different angles through cooperation of the convex lens and the concave mirror, and the generating capacity of the photovoltaic panel for the vertical face is effectively increased.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic panels, in particular to an optical device and a photovoltaic panel for a facade. Background Art

[0002] Photovoltaic panels for facades refer to devices that use the photovoltaic effect of semiconductor materials under light conditions to directly convert solar energy into electrical energy. However, photovoltaic panels for facades are fixed after installation. Due to the changes in azimuth caused by the rising and setting of the sun and the changes in the solar incident angle caused by the actual latitude of the region, the photoelectric conversion rate is affected, making a lot of energy unusable, resulting in a reduction in the rated power generation. Utility Model Content

[0003] The utility model provides an optical device and a photovoltaic panel for a facade, which can well adapt to the change of the solar incident angle and improve the power generation efficiency of the photovoltaic assembly for the facade.

[0004] According to a first aspect of the utility model, the utility model provides an optical device for guiding sunlight to a photovoltaic module for a facade, the optical device comprising:

[0005] A light guide plate, the light guide plate is used to evenly diffuse the collected sunlight and project it onto the photovoltaic assembly for the facade;

[0006] A convex lens, which is arranged on a side of the light guide plate away from the facade photovoltaic assembly and is used to converge the sunlight onto the light guide plate;

[0007] A concave mirror, which is arranged between the light guide plate and the convex lens, and is used to reflect the deviated sunlight to the surface of the convex lens, and then the sunlight is converged by the convex lens to form a sunlight beam and then incident on the light guide plate;

[0008] The packaging structure is fixed on the side of the light guide plate away from the facade photovoltaic assembly and has a transparent cavity, and the convex lens and the concave mirror are packaged in the transparent cavity.

[0009] In an optical device of one embodiment of the utility model, a light absorbing portion is provided on the light guide plate, the concave mirror is arranged around the light absorbing portion, and the position of the convex lens corresponds to the position of the light absorbing portion, so that the sunlight passing through the packaging structure can be collected at the light absorbing portion through the convex lens.

[0010] In an optical device according to an embodiment of the utility model, a protruding structure is provided on the light guide plate, the light absorbing portion is formed on the protruding structure, and the concave mirror is fixed on the protruding structure.

[0011] In an optical device of one embodiment of the utility model, the outer side wall of the protruding structure is provided with a first connecting portion, a through hole structure is formed in the middle of the concave mirror, the inner side wall of the through hole structure is provided with a second connecting portion, and the second connecting portion is connected to the first connecting portion.

[0012] In an optical device of one embodiment of the utility model, the light guide plate includes a transparent substrate and a diffuser plate, and the diffuser plate is arranged on one side or both sides of the transparent substrate to uniformly project the solar beams collected on the transparent substrate to the photovoltaic components on the facade.

[0013] In an optical device of one embodiment of the utility model, the diffuser plate includes a polycarbonate substrate and a diffusion layer arranged on the polycarbonate substrate, and aluminum ion particles are arranged inside the diffusion layer, so that the solar beam is diffused by the aluminum ion particles in the diffusion layer after passing through the polycarbonate substrate and projected onto the photovoltaic component for the facade.

[0014] In an optical device according to an embodiment of the present invention, the concave mirror includes a concave substrate and a reflective layer, wherein the reflective layer is formed on the front surface of the concave substrate and is used to reflect the deflected sunlight to the surface of the convex lens.

[0015] In the optical device of one embodiment of the utility model, the reflective layer includes a reflective sticker, and the reflective sticker is fixed to the front surface of the concave substrate by bonding.

[0016] In the optical device of one embodiment of the present invention, the reflective layer includes a metal coating, and the metal coating is formed on the front surface of the concave substrate by a coating process.

[0017] In the optical device of one embodiment of the utility model, the packaging structure is a spherical lens made of a transparent optical material, and the convex lens is pasted on top of the spherical lens to collect sunlight onto the light absorbing portion of the light guide plate.

[0018] In the optical device of one embodiment of the present invention, the ratio of the diameter of the spherical lens to the diameter of the convex lens is in the range of 1 to 1.5.

[0019] In the optical device of one embodiment of the utility model, the central axis of the convex lens forms an angle of 30 degrees to 40 degrees with the central axis of the spherical lens.

[0020] In the optical device of one embodiment of the utility model, the central axis of the convex lens coincides with the central axis of the concave mirror.

[0021] According to the second aspect of the utility model, the utility model also provides a photovoltaic panel for facade, including a photovoltaic module for facade and a plurality of the above-mentioned optical devices, wherein the plurality of optical devices are arranged at intervals on the photovoltaic module for facade to uniformly guide sunlight to the photovoltaic module for facade.

[0022] The technical solution provided by the embodiments of the present application may include the following beneficial effects: the present application designs an optical device and a facade photovoltaic panel, including a light guide plate, a convex lens, a concave mirror and a packaging structure, the convex lens and the concave mirror are packaged in a transparent cavity of the packaging structure, and the packaging structure is fixed on the side of the light guide plate away from the facade photovoltaic component, so that the sunlight can be collected and adjusted through the synergistic effect of the convex lens and the concave mirror, and then the light guide plate evenly diffuses and projects the sunlight onto the facade photovoltaic component of the facade photovoltaic panel, so that the facade photovoltaic component receives sunlight that is relatively parallel and perpendicular to the component, and can adapt well to changes in the solar incident angle, thereby reducing the problem of power generation reduction caused by changes in the solar azimuth and incident angle, and improving the power generation efficiency of the facade photovoltaic component.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a schematic diagram of the optical path of an optical device provided by an embodiment of the present application;

[0026] Figure 2 yes Figure 1 A schematic diagram of the structure of the optical device in FIG.

[0027] Figure 3 It is a schematic diagram of the structure of a photovoltaic panel for a facade provided in one embodiment of the present application.

[0028] Description of reference numerals:

[0029] 100, optical device; 101, first optical device; 102, second optical device; 103, third optical device; 104, fourth optical device; 105, fifth optical device; 200, photovoltaic module for facade;

[0030] 10. light guide plate; 11. protruding structure; 111. light absorbing part;

[0031] 20. Concave mirror; 30. Convex lens; 40. Packaging structure; 41. Transparent cavity. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should also be understood that the terms used in this utility model specification are only for describing specific realities. In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0035] like Figures 1 to 3 As shown, according to the first aspect of the present application, the present application provides an optical device 100, which uses a facade photovoltaic panel to guide sunlight to a facade photovoltaic component 200 of the facade photovoltaic panel, so that the facade photovoltaic component 200 can use sunlight to generate the required electricity. It has a clever design, a simple structure, good practicality, and a high value for promotion and application.

[0036] In this embodiment, the optical device 100 includes a light guide plate 10 and a convex lens 30. The convex lens 30 is arranged on the side of the light guide plate 10 away from the facade photovoltaic component 200, and is used to converge the sunlight to the light guide plate 10; the light guide plate 10 is used to evenly diffuse the converged sunlight and project it onto the facade photovoltaic component 200, so that the facade photovoltaic component 200 can receive sunlight that is relatively parallel and perpendicular to the component, thereby reducing the rated power generation reduction caused by changes in the solar azimuth and incident angle.

[0037] Exemplarily, there is a first preset angle between the central axis of the convex lens 30 and the light guide plate 10. The first preset angle is mainly set according to the latitude information of the use area of ​​the facade photovoltaic assembly 200 to ensure that it can effectively collect nearly parallel sunlight onto the light guide plate 10, reduce the energy loss of sunlight during the conduction process, and effectively increase the actual power generation of the facade photovoltaic panel.

[0038] In an optional embodiment, the optical device 100 also includes a concave mirror 20, which is arranged between the light guide plate 10 and the convex lens 30, and is used to reflect the offset sunlight to the surface of the convex lens 30, and after being converged by the convex lens 30 to form a solar beam, it is incident on the light guide plate 10, so that the sunlight can be better reflected to the facade photovoltaic component 200, thereby avoiding the loss of light energy caused by changes in the solar azimuth and the incident angle, so that the facade photovoltaic panel can automatically collect and adjust the sunlight according to the rising and setting of the sun and the change of the azimuth, with the help of the convex lens 30 and the concave reflector, and then project the light to the facade photovoltaic component 200 through the light guide plate 10 according to the designed light path, so that the facade photovoltaic component 200 can receive sunlight that is relatively parallel and perpendicular to the component, thereby reducing the rated power generation reduction caused by changes in the solar azimuth and the incident angle, and improving the power generation efficiency of the facade photovoltaic panel.

[0039] Exemplarily, there is a second preset angle between the central axis of the concave mirror 20 and the light guide plate 10, and the second preset angle is positively correlated with or equal to the first preset angle, so that the photovoltaic panel on the facade can avoid the loss of light energy caused by changes in the solar azimuth and incident angle, and can even gather sunlight at different times of the day or in four seasons without using a solar tracking system.

[0040] In an optional embodiment, the concave mirror 20 can also be a reflector with a concave structure similar to a spherical mirror and a wavy mirror. Its main purpose is to increase the reflection intensity of sunlight and thereby improve the power generation efficiency of the photovoltaic panel for the facade. This application is not limited thereto.

[0041] In an optional embodiment, the optical device 100 further includes a packaging structure 40, which is fixed to the side of the light guide plate 10 away from the facade photovoltaic assembly 200 and has a transparent cavity 41, and the convex lens 30 and the concave mirror 20 are packaged in the transparent cavity 41 to prevent the convex lens 30 and the concave mirror 20 from being affected by pollutants such as moisture or dust. The packaging structure 40 includes but is not limited to tempered glass.

[0042] Exemplarily, when the optical device 100 is packaged by the packaging structure 40, the packaging structure 40 is fixed on the light guide plate 10 according to a predetermined installation position to ensure the firmness and horizontality of the installation of the packaging structure 40; then, according to the latitude information of the area where the facade photovoltaic panel is used, with reference to the solar incident angle data in the area and the design parameters of the convex lens 30, the appropriate position and angle of the convex lens 30 on the packaging structure 40 are determined, so that the convex lens 30 can effectively collect approximately parallel sunlight onto the light guide plate 10; then, the concave mirror 20 is installed at an appropriate position in the transparent cavity 41, and the reflective surface of the concave mirror 20 is facing one side of the convex lens 30 to achieve the best light reflection effect.

[0043] It should be noted that the convex lens 30 is fixed to the packaging structure 40 by gluing, and during the gluing process of the convex lens 30, the surface of the convex lens 30 is ensured to be clean and free of stains and scratches to ensure a good light convergence effect. When the packaging structure 40 is installed on the light guide plate 10, the side with the convex lens 30 should be facing the incident direction of the sunlight, and the installation needs to be stable to avoid shaking or displacement, which affects the transmission path of the sunlight in the packaging structure 40.

[0044] In an optional embodiment, a light absorbing portion 111 is provided on the light guide plate 10, and the concave mirror 20 is arranged around the light absorbing portion 111. The position of the convex lens 30 corresponds to the position of the light absorbing portion 111, so that the sunlight passing through the packaging structure 40 can be collected at the light absorbing portion 111 through the convex lens 30, and then the light guide plate 10 projects the sunlight onto the facade photovoltaic module 200 according to the designed light path, so that the facade photovoltaic module 200 can receive sunlight that is relatively parallel and perpendicular to the module, thereby reducing the reduction in rated power generation caused by changes in the solar azimuth and incident angle.

[0045] It should be noted that after the convex lens 30 and the concave mirror 20 are packaged in the packaging structure 40, the position of the convex lens 30 corresponds to the position of the concave mirror 20 to ensure that its light absorption point can accurately receive the sunlight converged by the convex lens 30 and reflected by the concave mirror 20.

[0046] In an optional embodiment, a protruding structure 11 is provided on the light guide plate 10, a light absorbing portion 111 is formed on the protruding structure 11, and a concave mirror 20 is fixed on the protruding structure 11 to ensure the stability between the concave mirror 20 and the light guide plate 10, so that the concave mirror 20 will not loosen or fall off during the operation of the facade photovoltaic panel, thereby ensuring that the concave mirror 20 can be firmly connected to the end face of the light guide plate 10, avoiding the optical device 100 from being unusable due to the concave mirror 20 falling off.

[0047] In an optional embodiment, the outer side wall of the protruding structure 11 is provided with a first connecting portion, a through hole structure is formed in the middle of the concave mirror 20, and the inner side wall of the through hole structure is provided with a second connecting portion, and the second connecting portion is connected to the first connecting portion.

[0048] In an optional embodiment, the light guide plate 10 includes a transparent substrate and a diffuser, and the diffuser is disposed on one side or both sides of the transparent substrate, and is used to evenly project the solar beams collected on the transparent substrate to the facade photovoltaic assembly 200. Among them, the protruding structure 11 is formed on the transparent substrate, and the diffuser is used to scatter and disperse the incident light to make the distribution of the solar light more uniform.

[0049] In an optional embodiment, the diffuser plate includes a polycarbonate substrate and a diffusion layer disposed on the polycarbonate substrate, and aluminum ion particles are disposed inside the diffusion layer, so that the solar light beam is diffused by the aluminum ion particles in the diffusion layer after passing through the polycarbonate substrate and projected onto the facade photovoltaic module 200, so that the light projected onto the light guide plate 10 can be evenly diffused to form scattered light dispersed in all directions, so that the facade photovoltaic module 200 can receive sunlight that is relatively parallel and perpendicular to the module, thereby reducing the rated power generation reduction caused by changes in the solar azimuth and incident angle.

[0050] In an optional embodiment, the concave mirror 20 includes a concave substrate and a reflective layer, wherein the reflective layer is formed on the front surface of the concave substrate and is used to reflect the deflected sunlight to the surface of the convex lens 30 .

[0051] In an optional embodiment, the reflective layer includes a reflective sticker, and the reflective sticker is fixed to the front surface of the concave substrate by bonding.

[0052] In an optional embodiment, the reflective layer includes a metal coating layer, and the metal coating layer is formed on the front surface of the concave substrate by a coating process.

[0053] In an optional embodiment, the packaging structure 40 is a spherical lens made of a transparent optical material, and the convex lens 30 is pasted on top of the spherical lens to collect sunlight onto the light absorbing portion 111 of the light guide plate 10 .

[0054] In an optional embodiment, the ratio of the diameter of the spherical lens to the diameter of the convex lens 30 is in the range of 1 to 1.5, so as to allow a greater amount of incident sunlight to enter the convex lens 30 .

[0055] In an optional embodiment, the central axis L2 of the convex lens 30 forms an angle β of 30 to 40 degrees with the central axis L1 of the spherical lens.

[0056] In an optional embodiment, the central axis L2 of the convex lens 30 coincides with the central axis of the concave mirror 20 to ensure that the light absorbing portion 111 can accurately receive the sunlight converged by the convex lens 30 and reflected by the concave mirror 20 .

[0057] like Figures 1 to 3 As shown, according to the second aspect of the present application, the present application provides a photovoltaic panel for a facade, including a photovoltaic component 200 for a facade and the above-mentioned optical device 100, and a plurality of optical devices 100 are arranged at intervals on the photovoltaic component 200 for a facade to uniformly guide sunlight to the photovoltaic component 200 for a facade.

[0058] Exemplarily, the optical device 100 includes a first optical device 101, a second optical device 102, a third optical device 103, a fourth optical device 104 and a fifth optical device 105, and the first optical device 101, the second optical device 102, the third optical device 103, the fourth optical device 104 and the fifth optical device 105 are arranged at intervals along the length direction of the photovoltaic component 200 for the facade.

[0059] It should be noted that the optical device 100 of the embodiment of the present application has the same technical effect as the optical device 100 in the above-mentioned embodiments, and reference may be made to the relevant introduction of the above-mentioned embodiments, which will not be repeated here.

[0060] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected 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 this application can be understood according to the specific circumstances.

[0061] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0062] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. An optical device for directing sunlight to a photovoltaic module for a facade, characterized in that: The optical device comprises: A light guide plate, the light guide plate is used to evenly diffuse the collected sunlight and project it onto the photovoltaic assembly for the facade; A convex lens, which is arranged on a side of the light guide plate away from the facade photovoltaic assembly and is used to converge the sunlight onto the light guide plate; A concave mirror, which is arranged between the light guide plate and the convex lens, and is used to reflect the deviated sunlight to the surface of the convex lens, and then the sunlight is converged by the convex lens to form a sunlight beam and then incident on the light guide plate; The packaging structure is fixed on the side of the light guide plate away from the facade photovoltaic assembly and has a transparent cavity, and the convex lens and the concave mirror are packaged in the transparent cavity.

2. The optical device according to claim 1, characterized in that A light absorbing portion is disposed on the light guide plate, the concave mirror is disposed around the light absorbing portion, and the position of the convex lens corresponds to the position of the light absorbing portion, so that the sunlight passing through the packaging structure can be collected at the light absorbing portion through the convex lens.

3. The optical device according to claim 2, characterized in that: The light guide plate is provided with a protruding structure, the light absorbing portion is formed on the protruding structure, and the concave mirror is fixed on the protruding structure.

4. The optical device according to claim 3, characterized in that: The outer side wall of the protruding structure is provided with a first connecting portion, a through hole structure is formed in the middle of the concave mirror, the inner side wall of the through hole structure is provided with a second connecting portion, and the second connecting portion is connected to the first connecting portion.

5. The optical device according to claim 1, characterized in that: The light guide plate includes a transparent substrate and a diffusion plate. The diffusion plate is arranged on one side or both sides of the transparent substrate and is used to evenly project the solar beams collected on the transparent substrate to the photovoltaic components on the facade.

6. The optical device according to claim 5, characterized in that: The diffusion plate includes a polycarbonate substrate and a diffusion layer arranged on the polycarbonate substrate, wherein aluminum ion particles are arranged inside the diffusion layer, so that the solar beams are diffused by the aluminum ion particles in the diffusion layer after passing through the polycarbonate substrate and projected to the facade photovoltaic assembly.

7. The optical device according to claim 1, characterized in that: The concave mirror includes a concave substrate and a reflective layer, wherein the reflective layer is formed on a front surface of the concave substrate and is used to reflect deflected sunlight to a surface of the convex lens.

8. The optical device according to claim 7, characterized in that: The reflective layer includes a reflective sticker, and the reflective sticker is fixed on the front surface of the concave substrate by bonding.

9. The optical device according to claim 7, characterized in that: The reflective layer includes a metal plating layer formed on the front surface of the concave substrate by a plating process.

10. The optical device according to claim 1, characterized in that: The packaging structure is a spherical lens made of transparent optical material, and the convex lens is pasted on the top of the spherical lens to collect sunlight onto the light absorbing part of the light guide plate.

11. The optical device according to claim 10, characterized in that: A ratio of a diameter of the spherical lens to a diameter of the convex lens is in a range of 1 to 1.

5.

12. The optical device according to claim 10, characterized in that: The central axis of the convex lens forms an angle of 30 to 40 degrees with the central axis of the spherical lens.

13. The optical device according to claim 10, characterized in that: The central axis of the convex lens coincides with the central axis of the concave mirror.

14. A photovoltaic panel for a facade, characterized in that: It comprises a photovoltaic module for facade and a plurality of optical devices according to any one of claims 1 to 13, wherein the plurality of optical devices are arranged on the photovoltaic module for facade at intervals to uniformly guide the sunlight to the photovoltaic module for facade.

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