Reflective light diffusion device

Abstract

To solve problems with a light diffusion system using a light diffusion plate in solar sharing, in which: when an irradiation target is a multi-layer building (structure of two or more floors) or construction (structure of two or more stages), light could not be diffused to a lower layer; and, in application to a construction such as a vegetable factory, it was difficult to use the light diffusion system for a structure other than single-layer structures.SOLUTION: With respect to layers other than the uppermost layer of a plurality of layers, light is reflected by one or more mirrors, or by glass, metal or chemical material subjected to mirror finishing, and then a diffusion plate is irradiated with the light, so that the light is diffused through the diffusion plate.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a technology effective for application to a system for diffusing light in a layer other than the top layer in a building or structure having a plurality of layers with a structure in which a solar power generation panel is installed and light is passed through in parallel.

Background Art

[0002] Attention has been focused on a solar sharing system for coexisting with a solar power generation system and using agricultural land. By opening a gap (slit) between solar panels and passing light through it, it becomes possible to use sunlight for power generation and plant growth. Here, when sunlight is passed under the panel from the gap, since sunlight can only pass through in a slit shape, it has been difficult to constantly irradiate light under the solar panel for plant growth. Therefore, an invention by Hikariya Co., Ltd. has been made in which a light diffusion plate is used to diffuse light so that sunlight can be widely irradiated even under the solar panel and can be used for plant growth. The problem with this technology is that in a structure with multiple layers (floors), sunlight cannot be diffused in layers other than the top layer (floor). To solve this.

[0003] Also, as shown in FIG. 1, there was also a method of combining mirrors to irradiate light to areas other than the top layer (floor), but the irradiation with the mirror size as the upper limit was limited, and it was impossible to irradiate a wide area other than the top layer (floor) with light. Also, since the irradiation location changes with the movement of the sun over time, it was unsuitable for plant growth.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In a light diffusion system using a light diffusion plate in solar sharing, when the irradiation target is a building (structure with two or more floors) or a structure (structure with two or more levels) composed of multiple layers, light could not be diffused in the lower layer. When applying it to a structure such as a vegetable factory, it was difficult to use it for structures other than single-layer structures. This problem is solved.

Means for Solving the Problem

[0006] For layers other than the top layer of multiple layers, after reflecting light with one or more mirrors or glass with mirror finishing, or metal, or chemical materials, irradiate the light on the diffusion plate, and diffuse the light through the diffusion plate.

Effect of the Invention

[0007] In solar sharing where crops are grown under solar power generation panels installed on farmland, slopes, etc., in addition to planting on the ground, planting can be carried out in two or more tiers, and land use can be utilized without a background such as a light bulb. Also, due to global warming these days, food, etc. can no longer grow in the same place as before. When this is done in a building such as a plant factory where temperature can be controlled, or in a building with multiple floors, it becomes possible to grow food on each floor without installing a light bulb or the like.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention can be implemented in many different modes and should not be construed as being limited to the description of the present embodiments. The same elements throughout the embodiments will be given the same reference numerals.

[0010] In the following embodiments, mainly methods or systems will be described. As will be apparent to those skilled in the art, the present invention can also be implemented as a system that can be used in a solar power generation system. Therefore, the present invention can take the form of an embodiment as a building, an embodiment as a structure, or an embodiment as an agricultural system.

[0011] The present invention is applicable to a system that diffuses light in layers other than the top layer in a building or structure having a plurality of layers with a structure in which solar power generation panels are installed and light passes through them in parallel, and realizes efficient utilization of agricultural land without using electric power by means of artificial light sources.

[0012] Figure 2 is a conceptual diagram showing an example of diffusing light in a layer (floor) other than the top layer (floor) in a structure or building having a plurality of layers (floors) according to an embodiment of the present invention. Figure 2 reflects sunlight by a plurality of mirrors or mirror-finished metals or plates of the same chemical material, and diffuses the light through a light diffusion plate installed in a layer other than the top layer (floor), so that sunlight can be widely irradiated at all times compared to simply combining mirrors in layers other than the top layer (floor).

[0013] Figure 3 converges sunlight by inserting a convex lens in front of a plurality of mirrors or mirror-finished metals or plates of the same chemical material to make the light thinner and stronger, then reflects the light, and diffuses the light through a light diffusion plate installed in a layer other than the top layer (floor), so that sunlight can be irradiated with strong light at all times compared to simply combining mirrors in layers other than the top layer (floor). Also, by changing the light diffusion angle of the diffusion plate, it is possible to adjust the irradiation range and the intensity of the light.

[0014] Figure 4 arranges a concave mirror instead of the first mirror to obtain the same effect as the convex lens in Figure 3. It converges sunlight to make the light thinner and stronger, then reflects the light, and diffuses the light through a light diffusion plate installed in a layer other than the top layer (floor), so that sunlight can be irradiated with strong light at all times compared to simply combining mirrors in layers other than the top layer (floor). Also, by changing the light diffusion angle of the diffusion plate, it is possible to adjust the irradiation range and the intensity of the light. In addition, it is also effective to increase the incident intensity on the light diffusion plate by using a combination of a concave mirror and a convex lens, or a combination of other lenses and mirror surfaces to converge the light.

[0015] Figure 5 shows that instead of using slits, by reflecting light with a mirror installed on the side of a structure or building and diffusing the light through a light diffusing plate installed on floors other than the top floor, it becomes possible to irradiate sunlight constantly compared to the case where only mirrors are combined on floors other than the top floor. Also, by grounding a convex lens, a concave mirror, or a combination thereof in front of the mirror grounded on the side of the structure or building, it becomes possible to change the intensity of the light incident on the light diffusing plate.

Industrial Applicability

[0016] In a plant factory or a container-type plant factory, even in a place with land restrictions and in a multi-story building rather than a single-story structure, sunlight can be diffused without artificial light sources on floors other than the top floor. The same effect can be obtained at stations, buildings, etc. Also, for an interior where light from the sash cannot reach, by forming a combination of a mirror, a lens, a concave mirror, and a diffusing plate into a frame structure, it can be applied to a device that can be easily installed as a device for assisting in taking in light into the interior of a multi-story building or structure.

Claims

1. An optical diffusion device that combines sunlight with a mirror or a plate of a metal, glass, plastic, acrylic, polycarbonate, or PET chemical material with a mirror-finished surface to reflect light, allows the reflected light to enter a diffusion plate, and diffuses the light to floors other than the top floor of a multi-story building

2. The optical diffusion device according to Claim 1, wherein a convex lens is disposed in front of or behind, or in front of and behind, the mirror or the mirror-finished plate, or a concave mirror is disposed in place of the mirror or the mirror-finished plate, to converge light and cause the light to enter the diffusion plate

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