CN203365792U - Solar energy concentrator and solar energy fiber illumination system - Google Patents

Abstract

The utility model discloses a solar concentrator and a solar optical fiber lighting system. The solar concentrator includes an upper light guide plate, a lower light guide plate, and an optical fiber connected to the light-emitting surface of the lower light guide plate; The light structure, the light-emitting surface has a light-transmitting structure; the light-incoming surface of the lower light guide plate has protrusions and reflection structures; each light-gathering structure of the upper light guide plate refracts light to the reflecting surface of its corresponding light-transmitting structure, and the refracted light is reflected The parallel light is formed by reflection on the light-transmitting surface and exits the upper light guide plate through the light-transmitting surface of the light-transmitting structure. The light emitted from the light-transmitting surface is refracted into the lower light guide plate through the protruding refraction surface. Reflected into the optical fiber through the reflective structure, and directly transmitted to the illuminant of the solar optical fiber lighting system to emit light through the optical fiber, so the solar concentrator and solar optical fiber lighting system provided by the utility model can realize the purpose of applying sunlight direct lighting.

Description

A kind of solar concentrator and solar optical fiber lighting system

technical field

The utility model relates to the technical field of solar energy applications, in particular to a solar concentrator and a solar optical fiber lighting system.

Background technique

Solar energy is an inexhaustible clean and renewable energy source. At present, the utilization of solar energy has become an important means of energy conservation and emission reduction. Existing solar energy utilization methods include various utilization methods such as solar power generation, solar thermal utilization, and solar lighting. However, regardless of the utilization method of solar energy mentioned above, it is necessary to convert solar energy into another form of energy for application. There will be energy loss in the process of converting solar energy into another form of energy, and the solar energy cannot be fully utilized.

Direct sunlight lighting is currently the solar energy utilization method with the least energy loss, and compared with artificial light sources, direct sunlight lighting can restore the authenticity of colors and bring better visual effects.

Utility model content

The utility model provides a solar concentrator and a solar optical fiber lighting system. The solar concentrator can guide sunlight into an optical fiber and realize the purpose of directly applying sunlight to the solar optical fiber lighting system.

In addition, the utility model also provides a solar optical fiber lighting system with the above solar concentrator.

In order to achieve the above object, the utility model provides the following technical solutions:

A solar concentrator comprising an upper light guide plate, a lower light guide plate located on one side of the light-emitting surface of the upper light guide plate, and an optical fiber connected at one end to the light-emitting surface of the lower light guide plate;

The light incident surface of the upper light guide plate has a plurality of light concentrating structures, and the light output surface has a plurality of light transmitting structures corresponding to the light concentrating structures, and each of the light transmitting structures has a reflective surface and a light transmitting structure. Each of the light-gathering structures refracts light to its corresponding reflective surface of the light-transmitting structure, and after being reflected by the reflective surface, it exits the upper light guide plate through the light-transmitting surface;

The light incident surface of the lower light guide plate has a plurality of protrusions corresponding to the light-transmitting structure one by one, and each of the protrusions has a refraction surface opposite to the light-transmitting surface of the corresponding light-transmitting structure. The light emitted from the light-transmitting surface of the upper light guide plate is refracted into the lower light guide plate through the refraction surface of the protrusion;

The light incident surface of the lower light guide plate also has a reflective structure, and the light refracted into the lower light guide plate is reflected into the optical fiber by the reflective structure after being totally reflected in the lower light guide plate.

Preferably, the optical fiber is connected to the center of the light-emitting surface of the lower light guide plate;

The plurality of light concentrating structures include a plurality of annular ribs, and/or, a plurality of arc-shaped ribs;

The plurality of light-transmitting structures include a plurality of annular protruding teeth, and/or, a plurality of arc-shaped protruding teeth;

The plurality of protrusions include a plurality of circular prisms, and/or, a plurality of arcuate prisms;

The centers of the arc-shaped or circular convex ribs, convex teeth and prisms are all located on the central axis of the lower light guide plate.

Preferably, the light emitting surface of the lower light guide plate has a parabolic structure.

Preferably, the top surface of each convex rib of the light concentrating structure is a convex arc surface.

Preferably, the side of each of the protruding teeth of the light-transmitting structure that is far away from the central axis is a reflective surface, and the side of each of the protruding teeth of the light-transmitting structure that is close to the central axis is a light-transmitting surface, and the The reflecting surface is a paraboloid.

Preferably, the reflective structure is a horn-shaped depression with an opening located on the light incident surface of the lower light guide plate and concave toward the light output surface of the lower light guide plate, and the surface of the horn-shaped depression is coated with a reflective film.

Preferably, the materials of the upper light guide plate and the lower light guide plate are transparent acrylic material or glass material.

Preferably, a housing is further included, the upper light guide plate and the lower light guide plate are fixed to the housing, and the optical fiber passes through the housing and is connected to the light exit surface of the lower light guide plate.

Preferably, the top of the housing is provided with a transparent cover for protecting the upper light guide plate.

Preferably, the cover plate is mounted on the top of the housing through a clamp structure.

Preferably, the projection shapes of the upper light guide plate and the lower light guide plate on a plane perpendicular to the central axis of the lower light guide plate are the same, and the projection shapes are circular, square or elliptical.

The utility model also provides a solar optical fiber lighting system, including any solar concentrator provided in the above technical solution, one end of the optical fiber of the solar concentrator is connected to the light-emitting surface of the lower light guide plate, and the optical fiber is another One end is connected to the light emitter.

The solar concentrator provided by the utility model includes an upper light guide plate, a lower light guide plate located on one side of the light-emitting surface of the upper light guide plate, and an optical fiber connected to the light-emitting surface of the lower light guide plate;

The light-incoming surface of the upper light guide plate has multiple light-concentrating structures, and the light-emitting surface has multiple light-transmitting structures corresponding to the light-concentrating structures. Each light-transmitting structure has a reflective surface and a light-transmitting surface. The structure refracts light to the reflective surface of its corresponding light-transmitting structure, and after being reflected by the reflective surface, it exits the upper light guide plate through the light-transmitting surface;

The light incident surface of the lower light guide plate has a plurality of protrusions corresponding to the light-transmitting structure, each protrusion has a refraction surface opposite to the light-transmitting surface of the corresponding light-transmitting structure, and the light emitted from the light-transmitting surface of the upper light guide plate Refracted into the lower light guide plate through the protruding refraction surface;

The light incident surface of the lower light guide plate also has a reflective structure, and the light refracted into the lower light guide plate is totally reflected in the lower light guide plate and then reflected into the optical fiber by the reflective structure.

The solar concentrator provided by the utility model adopts the light guide plate as the light concentrating structure, and the sunlight irradiated on the light-incident surface of the upper light guide plate is refracted into the upper light guide plate by the light concentrating structure, and shoots to a light-transmitting structure corresponding to the light concentrating structure. The reflective surface of the light structure, the sun’s rays are reflected by the reflective surface and exit the upper light guide plate through the light-transmitting surface of the light-transmitting structure, and the sun’s rays emitted through the light-transmitting surface are refracted to the lower light guide plate through the protrusions on the light-incoming surface of the lower light guide plate Inside, the sunlight entering the lower light guide plate is reflected into the optical fiber by the reflective structure of the light incident surface of the lower light guide plate after several times of total reflection, and finally the sunlight is directly transmitted to the illuminant of the solar optical fiber lighting system through the optical fiber to emit light. .

Therefore, the solar concentrator provided by the utility model can guide sunlight into the optical fiber, and realize the purpose of directly applying sunlight to the solar optical fiber lighting system.

Description of drawings

Fig. 1 is the structural representation of the solar concentrator provided by the utility model embodiment one;

Fig. 2 is a schematic cross-sectional structure diagram of the upper light guide plate in the solar concentrator provided by Embodiment 1 of the utility model;

Fig. 3 is a partially enlarged schematic diagram of place A in Fig. 2;

Fig. 4 is a schematic cross-sectional structure diagram of the middle and lower light guide plate of the solar concentrator provided by Embodiment 1 of the utility model;

Fig. 5 is the partially enlarged schematic diagram of place B in Fig. 4;

Fig. 6 is a schematic diagram of the transmission route of sunlight in the solar concentrator provided by the first embodiment of the utility model;

Fig. 7 is a top view structural diagram of the upper light guide plate in the solar concentrator provided by Embodiment 1 of the utility model;

Fig. 8 is a top view structural diagram of the middle and lower light guide plate of the solar concentrator provided by Embodiment 1 of the present utility model;

Fig. 9 is a schematic structural diagram of a solar optical fiber lighting system provided by Embodiment 2 of the present invention.

1. Upper light guide plate; 11. Concentrating structure; 12. Light-transmitting structure;

13. Reflective surface; 14. Translucent surface; 2. Lower light guide plate;

21. Protrusion; 22. Reflective structure; 23. Refractive surface;

3. Optical fiber; 4. Luminous body; 5. Housing;

6. Cover plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment one:

Please refer to FIG. 1 to FIG. 5, a solar concentrator provided in this embodiment includes an upper light guide plate 1, a lower light guide plate 2 located on one side of the light-emitting surface of the upper light guide plate 1, and one end connected to the light-emitting surface of the lower light guide plate 2. Connected fiber 3;

The light incident surface of the upper light guide plate 1 has a plurality of light concentrating structures 11, and the light exit surface has a plurality of light transmitting structures 12 corresponding to the light concentrating structures 11. Each light transmitting structure 12 has a reflective surface 13 and a light transmitting surface. Surface 14, each light concentrating structure 11 refracts light to the reflecting surface 13 of its corresponding light-transmitting structure 12, and after being reflected by the reflecting surface 13, it exits the upper light guide plate 1 through the light-transmitting surface 14;

The light-incident surface of the lower light guide plate 2 has a plurality of protrusions 21 corresponding to the light-transmitting structure 12 one-to-one, and each protrusion 21 has a refraction surface 23 opposite to the light-transmitting surface 14 of the corresponding light-transmitting structure 12. The light emitted from the light-transmitting surface 14 of the light plate 1 is refracted into the lower light guide plate 2 through the refraction surface 23 of the protrusion 21;

The light incident surface of the lower light guide plate 2 also has a reflective structure 22, and the light refracted into the lower light guide plate is totally reflected in the lower light guide plate and then reflected into the optical fiber by the reflective structure.

Please refer to FIG. 6 , each light concentrating structure 11 of the upper light guide plate 1 refracts light to the reflection surface 3 of its corresponding light-transmitting structure 12 , and the refracted light is reflected on the reflection surface 13 and exits the upper light guide plate through the light-transmitting surface 14 1. The light emitted from the light-transmitting surface 14 is refracted into the lower light guide plate 2 through the refraction surface 23 of the protrusion 21 corresponding to the light-transmitting structure 12. After being totally reflected several times in the lower light guide plate 2, the light is reflected into the optical fiber through the reflection structure 22 within 3. The refraction surface 23 of the protrusion 21 can change the incident angle of the light emitted from the upper light guide plate 1 to the light incident surface of the lower light guide plate 2, so that the light incident on the protrusion 21 can be refracted into the lower light guide plate 2 by the refraction surface 23, thereby improving the light intensity. The utilization rate, enhance the effect of concentrating light.

The solar concentrator provided by the utility model adopts the light guide plate as the light concentrating structure, and the sunlight is converged by the light concentrating structure 11 on the light incident surface of the upper light guide plate 1 to the reflection surface 13 of the corresponding light-transmitting structure 12, and converges to the light-transmitting structure 12 The sunlight on the reflective surface 13 is reflected by the reflective surface 13 and exits the upper light guide plate 1 through the light-transmitting surface 14, and the sunlight emitted through the light-transmitting surface 14 is refracted to the lower light guide plate 2 by the protrusion 21 on the light incident surface of the lower light guide plate 2 After several total reflections between the light incident surface and the light exit surface of the lower light guide plate 2, the reflection structure 22 on the light incident surface of the lower light guide plate 2 is reflected into the optical fiber 3, and finally the sunlight is directly transmitted to the optical fiber 3 through the optical fiber 3. The illuminant 4 of the solar optical fiber lighting system emits light.

Therefore, the solar concentrator provided in this embodiment can guide sunlight into the optical fiber 3, and realize the purpose of directly applying sunlight to the solar fiber optic lighting system.

Specifically, the above-mentioned optical fiber 3 is connected to the center of the light-emitting surface of the lower light guide plate 2;

Please refer to FIG. 2 and FIG. 7, the plurality of light-concentrating structures 11 include a plurality of circular ribs, and/or, a plurality of arc-shaped ribs;

The plurality of light-transmitting structures 12 include a plurality of annular protruding teeth, and/or, a plurality of arc-shaped protruding teeth;

Please refer to FIG. 4 and FIG. 8, the plurality of protrusions 21 include a plurality of circular prisms, and/or, a plurality of arcuate prisms;

The centers of the arc-shaped or circular convex ribs, convex teeth and prisms are all located on the central axis of the lower light guide plate 2 .

The central axis of the lower light guide plate 2 passes through the centers of the lower light guide plate 2 and the upper light guide plate 1 at the same time, and a plurality of circular ribs and/or arc-shaped ribs all surround the center of the lower light guide plate 2 The axes are closely arranged on the light incident surface of the upper light guide plate 1, so that the number of light concentrating structures 11 that can be arranged on the light incident surface of the upper light guide plate 1 increases, thereby increasing the concentration of sunlight on the light incident surface of the upper light guide plate 1. The total area of the light structure 11 further improves the light-gathering effect of the upper light guide plate 1 .

A plurality of ring-shaped protruding teeth and/or a plurality of arc-shaped protruding teeth are closely arranged on the light-emitting surface of the upper light guide plate 1 around the central axis of the lower light guide plate 2, so as to receive as many light-gathering structures as possible. The light rays refracted by 11 to the reflective surface 13 of the light-transmitting structure 12 increase the total amount of sunlight reflected by the reflective surface 13 to the light-transmitting surface 14 .

A plurality of ring-shaped protrusions and (or) a plurality of arc-shaped protrusions are closely arranged on the light incident surface of the lower light guide plate 2 around the central axis of the lower light guide plate 2, so as to receive as many light-transmitting structures 12 as possible. The light emitted from the light-transmitting surface 14 further increases the total amount of sunlight entering the lower light guide plate 2, thereby increasing the utilization rate of the sunlight.

Please refer to Fig. 4, more specifically, the light-emitting surface of the above-mentioned lower light guide plate 2 is a parabolic structure, so that the lower light guide plate 2 forms a structure similar to a convex lens with a thick middle and thin edges, and a specific lower light guide plate with a square structure 2 as an example, the central thickness H of the lower light guide plate 2 is 13 mm, the thickness h of the lower light guide plate 2 at the diagonal edge is 2.44 mm, and the intersection angle α between the light-emitting surface of the lower light guide plate 2 and the central axis of the lower light guide plate 2 is 93°.

When the sun rays are totally reflected in the lower light guide plate 2, after several times of total reflection, the angle between the sun rays closer to the center of the lower light guide plate 2 and the light-emitting surface of the lower light guide plate 2 is smaller, and the closer to the center of the lower light guide plate 2 The longer the optical path of the solar rays after one reflection, so that more solar rays are directed to the reflective structure 22, and reflected into the optical fiber 3 through the reflective structure 22, further improving the performance of the solar concentrator provided by this embodiment. spotlight effect.

Please refer to FIG. 2 and FIG. 3 , specifically, the top surface of each of the convex ribs of the above-mentioned light concentrating structures 11 is a convex arc surface.

The sunlight irradiated on a convex ridge with an arc surface is focused on the reflective surface 13 of a light-transmitting structure 12 , thereby improving the light-gathering effect of the light-gathering structure 11 on the light-incident surface of the upper light guide plate 1 .

Please continue to refer to FIG. 2 and FIG. 3 , specifically, the side of the protruding teeth of each of the above-mentioned light-transmitting structures 12 that is far away from the above-mentioned central axis is the reflective surface 13, and the side of the protruding teeth of each of the above-mentioned light-transmitting structures 12 that is close to the above-mentioned central axis is the light-transmitting surface 14, and the reflecting surface 13 is a paraboloid.

In this way, after the sunlight enters the lower light guide plate 2, it can be reflected in the lower light guide plate 2 to the reflective structure 22 with the shortest optical path, which reduces the number of total reflections of the sun rays in the lower light guide plate and reduces the total reflection of the sun rays. consume. Moreover, the reflective surface 13 of the paraboloid structure reflects the sun rays refracted thereon to form parallel light, so that the emission rate of the sun rays emitted from the light-transmitting surface 14 of the protruding teeth is improved, and the sun rays pass through the lower light guide plate 2 at the same time. The probability that the refraction surface 23 of the upper protrusion 21 is refracted into the lower light guide plate 2 improves the utilization rate of the sunlight gathered in the upper light guide plate 1 and further improves the light concentrating effect.

Please refer to FIG. 4 , specifically, the reflective structure 22 is a horn-shaped depression with an opening located on the light incident surface of the lower light guide plate 2 and recessed on the light output surface of the lower light guide plate 2 . The surface of the horn-shaped depression is coated with a reflective film.

The arc-shaped surface of the trumpet-shaped recessed part coated with the reflective film can reflect the sun's rays coming from all directions in the lower light guide plate into the optical fiber, further improving the utilization rate of the sun's rays.

More specifically, the materials of the upper light guide plate 1 and the lower light guide plate 2 are transparent acrylic materials or glass materials or other transparent materials that can be used to manufacture light guide plates.

Please refer to Fig. 1, specifically, the solar concentrator provided by this embodiment also includes a housing 5, the upper light guide plate 1 and the lower light guide plate 2 are fixed in the housing 5, and the optical fiber 3 passes through the gap between the housing 5 and the lower light guide plate 2 Light-emitting connection.

The upper light guide plate 1 and the lower light guide plate 2 are assembled in the housing 5 through clamp connection, bolt connection or bonding, etc., so that the relative positions of the upper light guide plate 1 and the lower light guide plate 2 are fixed, thereby improving the performance of the utility model. The stability and reliability of the solar concentrator.

Specifically, a transparent cover plate 6 for protecting the upper light guide plate 1 is provided on the top of the housing 5 .

The cover plate 6 can be a glass cover plate made of transparent plexiglass or toughened glass, or can be a cover plate made of other materials with certain strength and high permeability. The cover plate 6 covers the top of the upper light guide plate 1, which can effectively prevent the upper light guide plate 1 from being damaged by hard objects such as sand and stones hitting the upper light guide plate 1; The space prevents the sunlight emitted from the light-transmitting surface 14 from entering the refracting surface 23 of the protrusion 21 .

More specifically, in order to facilitate the installation and replacement of the cover plate 6 , the above cover plate 6 is installed on the top of the housing 5 using a clamp structure.

More specifically, the projection shapes of the upper light guide plate 1 and the lower light guide plate 2 on a plane perpendicular to the central axis of the lower light guide plate 2 are the same, and the projection shapes can be circular, square, elliptical or other shapes, which are the same as The projection shapes of the upper light guide plate 1 and the lower light guide plate 2 are corresponding, and the shell 5 of the solar concentrator can also be made into a circle, a square, an ellipse or other shapes, so as to facilitate fixing the upper light guide plate 1 and the lower light guide plate 2 on the Inside the shell 5.

When the projection shape of the upper light guide plate 1 and the lower light guide plate 2 on a surface parallel to the upper light guide plate 1 is a square shape, the convex shape of the upper light guide plate 1 within the inscribed circle of the square light incident surface is circular. , the shape of the convex edges outside the range of the inscribed circle is arc-shaped; the shape of the convex teeth within the range of the inscribed circle of the square light-emitting surface of the upper light guide plate is circular, and the shape of the convex teeth outside the range of the inscribed circle is a circle Arc shape; the shape of the protrusions within the inscribed circle range of the square light-incident surface of the lower light guide plate 2 is circular, and the protrusions outside the inscribed circle range are arc-shaped.

Embodiment two:

Please refer to Fig. 9, the present embodiment provides a kind of solar fiber optic lighting system, including the solar concentrator provided in the above embodiment, one end of the optical fiber 3 is arranged on the light-emitting surface of the lower light guide plate 2, and the other end of the optical fiber 3 is connected to There are illuminants 4.

The solar concentrator can directly transmit the concentrated sunlight to the illuminant 4 through the optical fiber 3 to emit light, which can realize the purpose of direct application of sunlight to the solar optical fiber lighting system.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (12)

1. A solar concentrator, characterized in that it comprises: an upper light guide plate, a lower light guide plate positioned at one side of the light-emitting surface of the upper light guide plate, and an optical fiber connected at one end to the light-emitting surface of the lower light guide plate; The light incident surface of the upper light guide plate has a plurality of light concentrating structures, and the light output surface has a plurality of light transmitting structures corresponding to the light concentrating structures, and each of the light transmitting structures has a reflective surface and a light transmitting structure. Each of the light-gathering structures refracts light to its corresponding reflective surface of the light-transmitting structure, and after being reflected by the reflective surface, it exits the upper light guide plate through the light-transmitting surface; The light incident surface of the lower light guide plate has a plurality of protrusions corresponding to the light-transmitting structure one by one, and each of the protrusions has a refraction surface opposite to the light-transmitting surface of the corresponding light-transmitting structure. The light emitted from the light-transmitting surface of the upper light guide plate is refracted into the lower light guide plate through the refraction surface of the protrusion; The light incident surface of the lower light guide plate also has a reflective structure, and the light refracted into the lower light guide plate is reflected into the optical fiber by the reflective structure after being totally reflected in the lower light guide plate. the 2. The solar concentrator according to claim 1, wherein the optical fiber is connected to the center of the light-emitting surface of the lower light guide plate; A plurality of said concentrating structures include a plurality of annular ribs, and/or, a plurality of arc-shaped ribs; A plurality of the light-transmitting structures include a plurality of annular protruding teeth, and/or, a plurality of arc-shaped protruding teeth; The plurality of protrusions include a plurality of circular prisms, and/or, a plurality of arcuate prisms; The centers of the arc-shaped or circular convex ribs, convex teeth and prisms are all located on the central axis of the lower light guide plate. the 3. The solar concentrator according to claim 2, characterized in that, the light emitting surface of the lower light guide plate is a parabolic structure. the 4. The solar concentrator according to claim 2, characterized in that, the top surface of each rib of the concentrating structure is a convex arc surface. the 5. The solar concentrator according to claim 2, characterized in that, the side away from the central axis of each of the protruding teeth of the light-transmitting structure is a reflective surface, and each of the protruding teeth of the light-transmitting structure The side close to the central axis is a light-transmitting surface, and the reflecting surface is a paraboloid. the 6. The solar concentrator according to claim 2, wherein the reflective structure is a trumpet-shaped recess with an opening located on the light incident surface of the lower light guide plate and concave toward the light output surface of the lower light guide plate , the surface of the horn-shaped concave part is coated with a reflective film. the 7. The solar concentrator according to claim 1, characterized in that, the material of the upper light guide plate and the lower light guide plate is transparent acrylic material or glass material. the 8. The solar concentrator according to claim 1, further comprising a housing, the upper light guide plate and the lower light guide plate are fixed to the housing, and the optical fiber passes through the housing and the lower guide plate Connect to the light-emitting surface of the light board. the 9. The solar concentrator according to claim 8, wherein a transparent cover plate for protecting the upper light guide plate is provided on the top of the housing. the 10 . The solar concentrator according to claim 9 , wherein the cover plate is mounted on the top of the housing through a clamp structure. 11 . the 11. The solar concentrator according to any one of claims 1-10, characterized in that the projection shapes of the upper light guide plate and the lower light guide plate on a plane perpendicular to the central axis of the lower light guide plate are the same , the projection shape is a circle, a square or an ellipse. the 12. A solar optical fiber lighting system, characterized in that it comprises the solar concentrator according to any one of claims 1 to 11, one end of the optical fiber of the solar concentrator is connected to the light-emitting surface of the lower light guide plate, The other end of the optical fiber is connected to the illuminant. the

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