TWI489135B - Static light concentrating apparatus - Google Patents

Description

Static light collecting device

The invention relates to a light collecting device, in particular to a static light collecting device.

In an era when the earth's energy is gradually depleted and carbon dioxide emissions are being reduced, countries should actively develop environmentally-friendly self-produced energy sources in order to sustain development. Making good use of inexhaustible sunlight is a very valuable method of use.

In general, a system that directs sunlight directly into the interior for lighting applications is called a natural light guiding lighting system. In the natural light guiding illumination system, the concentrator is an important component, which is used to collect large-area scattered solar rays and combine them into small-area and relatively high-intensity light for rear-end transmission applications. . As shown in FIG. 1 , it is a conventional concentrator, which is mainly composed of a single-layer reflector 1 having a wide upper and lower width, so that sunlight can be collected first at the bottom end of the reflector and then imported. The indoors further expands the injection application.

Although the structure of the conventional light concentrator can achieve the effect of collecting the sun's rays, when the illumination angle of the light source is too skewed (such as morning and afternoon sunlight), the light must be inside the reflector of the concentrator. Multiple reflections can be emitted from the bottom exit, which can cause a large loss of light energy that can be collected during this period. In order to improve the lack of the above concentrator, the current countermeasure is to construct a plurality of optical lenses on an optical guiding mechanism, such as the sunflower hunter (Himawari) shown in Fig. 1A, so that the concentrator can be adjusted according to the sun's orientation. Angle of the face Operation. However, such instruments have high cost of additional power consumption, and contain electronic components such as control circuits, which cause them to be prone to failure and frequent maintenance.

Therefore, how to provide a light-transmitting body which can effectively improve the problems existing in the structure of the concentrator and has a simple structure and is easy to manufacture and implement is a design focus of the technical field.

It is an object of the present invention to provide a static light collecting device which is low in cost and excellent in light collecting efficiency.

Another object of the present invention is to provide a static light collecting device that utilizes a stacked structure to accumulate energy and equivalently enhance the light collecting area.

To achieve the above object, a static light collecting device according to an embodiment of the present invention includes a light transmitting body. The light transmissive system is a structure that approximately forms a truncated cone shape, and the truncated cone structure has an axis of symmetry. The light transmissive body has a first light incident surface, an outer sidewall, a first light exit surface, and a hollow portion. The first light incident surface is located on the bottom surface of the truncated cone structure, the first light exiting surface is located on the bottom surface of the truncated cone structure, and the outer side wall is connected to one end of the first light incident surface and one end of the first light emitting surface. between. The hollow portion is an inverted conical shape disposed at the center of the light transmitting body. The hollow portion has a first top end on the axis of symmetry, and the first top end is located at a center point of the first light exiting surface. The hollow portion has an inner side wall on the other side of the opposite outer side wall, and is connected between one end of the first light incident surface and one end of the first light emitting surface. The light enters the light-transmitting body from the first light-incident surface, and then passes through the outer sidewall for the first time. After being reflected, it is incident on the inner side wall, and is emitted from the first light-emitting surface by the second total reflection of the inner side wall and away from the first light-incident surface.

In one embodiment, the hollow portion has a circular aperture, and the circular aperture is formed in a central region of the first light incident surface.

In one embodiment, the static light collecting device further includes an inverted cone having a round bottom surface and a top end, wherein the circular bottom surface is connected to the first light emitting surface of the light transmitting body, and the top end is disposed on the axis of symmetry on.

In one embodiment, the static light collecting device further includes an inverted cone, which is an inverted cone, the inverted cone has a round bottom surface, a sloped surface and a top end, and the circular bottom surface is connected to the first portion of the light transmitting body. Glossy.

In one embodiment, the first light incident surface is a horizontal plane, and the first light incident surface forms an outer angle with the inner sidewall of the hollow portion, and the first light emitting surface is a horizontal plane, and the first light emitting surface is The tapered surface of the inverted cone forms an inner angle, wherein the outer angle and the inner angle are both acute angles.

In an embodiment, the static light collecting device further includes an anti-reflection layer covering the first light incident surface of the light transmitting body.

In an embodiment, the static light collecting device includes a plurality of light collecting units stacked on each other, and the plurality of light collecting units includes a first light collecting unit and a second light collecting unit. The first light collecting unit includes the above-mentioned light transmitting body set inverted cone. The second light collecting unit is disposed below the first light collecting unit and includes the light transmitting body. When the first light collecting unit is stacked on the second light collecting unit, the first inverted cone is adapted to be placed into the second hollow portion, and the first inverted cone and the second inner sidewall There is a gap between them.

In one embodiment, the first outer sidewall of the first light transmissive body and the second outer sidewall of the second light transmissive body are coupled to each other to form a smooth surface.

In one embodiment, the static light collecting device further includes a plurality of triangular columns, each of the triangular columns has a third light incident surface, a bottom surface and a side surface, and the third light incident surface, the bottom surface and the side surfaces are adjacent to each other. The side surface is parallel to the first axis of symmetry, and the bottom surface is disposed on the first light incident surface of the first light collecting unit and perpendicular to the side surface.

In one embodiment, the triangular prisms are symmetrically arranged on both sides centering on the first axis of symmetry.

In one embodiment, the outer sidewalls of the light transmissive bodies are interconnected to form an inclined surface.

In an embodiment, the first light incident surface of the first light collecting unit is an inclined surface, and the inclined surface is at an acute angle with the horizontal plane.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as upper, lower, left, right, front or rear, etc., are only used to refer to the directions of the accompanying drawings. Therefore, the directional terms are used for illustration only and are not intended to limit the invention.

Please refer to FIG. 2 , which is a structural diagram of a static light collecting device 200 according to an embodiment of the present invention. The static light collecting device 200 of the present invention may include a light transmission The body 300. The light transmissive body 300 is a structure 300a that approximately forms a truncated cone shape, and the truncated cone structure 300a has a virtual axis of symmetry 210. The light transmissive body 300 has a first light incident surface 310 , an outer sidewall 330 , a first light exit surface 320 , and a hollow portion 400 . The first light incident surface 310 is located above the first light exit surface 320. The outer side wall 330 is an inclined surface that is connected between one end of the first light incident surface 310 and one end of the first light exit surface 320. The hollow portion 400 is an inverted cone and is disposed at the center of the light transmitting body 300. The hollow portion 400 has a first top end 401 on the axis of symmetry 210, and the first top end 401 is located at a center point of the first light exiting surface 320. The hollow portion 400 has an inner side wall 410 connected between one end of the first light incident surface 310 and one end of the first light exit surface 320, and the inner side wall 410 is disposed on the other side of the opposite outer side wall 330. The inverted tapered side wall portion of the hollow portion 400.

As shown in FIG. 2A, it is a cross-section and a ray path diagram of a static light collecting device 200 according to an embodiment of the present invention. The light path R1 enters the light-transmitting body 300 from the first light-incident surface 310 toward the first light-emitting surface 320. The light is first totally reflected by the outer sidewall 330 and is incident on the inner sidewall 410, and is formed by the inner sidewall. After performing the second total reflection, the 410 proceeds toward the direction away from the first light incident surface 310, and finally exits from the first light exit surface 320. The static light collecting device 200 may include an anti-reflection layer covering the first light incident surface 310 of the light transmitting body 300 to facilitate collecting light and increasing light collecting efficiency. The light path R2 is directed toward the first light-emitting surface 320, and the inner side wall 410 enters a small portion of the light of the light-transmitting body 300, and the light passes through After the light body is refracted, it is emitted from the first light exit surface 320.

As shown in FIG. 3, it is a structural diagram of a static light collecting device 200a according to another embodiment of the present invention. The static light collecting device 200a of the present invention is the static light collecting device 200 structure described above, and further includes an inverted cone 500. The inverted cone 500 has a rounded bottom surface 510 and a top end 501. The circular bottom surface 510 is connected to the first light-emitting surface 320 of the light-transmitting body 300, and the top end 501 is disposed on the symmetry axis 210. The inverted cone 500 and the static type are used to reduce the loss of light. The structure of the light collecting device 200 is preferably integrally formed. The hollow portion 400 has a circular aperture 420 that is a circular opening that is formed in a central region of the first light incident surface. The area of the round bottom surface 510 of the inverted cone 500 is less than or equal to the area of the circular aperture 420 of the hollow portion 400.

As shown in FIG. 3A, it is a cross-section and a ray path diagram of the collecting dam 200a cut along the axis of symmetry according to an embodiment of the present invention. The collecting dam 200a of the present invention has an outer angle θ ₁ and an inner angle θ ₂ . The first light incident surface 310 and the first light exit surface 320 are both horizontal planes. The outer angle θ ₁ is an acute angle formed by the first light incident surface 310 of the light transmitting body 300 and the inner side wall 410 of the hollow portion 400, and the inner angle θ ₂ is the first light emitting surface 320 of the light transmitting body 300 and An acute angle formed by the tapered surface 530 of the inverted cone 500. Wherein, the angle of the inner angle θ ₂ is smaller than the angle of the outer angle θ ₁ , in other words, the volume of the inverted cone 500 is smaller than the volume of the hollow portion 400.

Please refer to FIG. 3A , which shows that the light path R3 enters the light-transmitting body 300 from the first light-incident surface 310 toward the first light-emitting surface 320. After the side wall 330 is reflected, it is emitted from the tapered surface 530 of the inverted cone 500. At this time, after the refraction of the inverted cone 500, the traveling direction of the light will be more toward the axis of symmetry 210; and the light path R4 is a small part. The inner side wall 410 of the hollow portion 400 enters the light of the light transmitting body 300, and is emitted through the tapered surface 530 of the inverted cone 500. After the light is refracted by the inverted cone 500, the original path R2 is away from the axis of symmetry 210. The transition is made to approach the direction of the axis of symmetry 210. Therefore, the design of the inverted cone 500 will make the light not easily diffuse and consume energy, and can make the light collecting effect of the static light collecting device 200a better.

Please refer to FIG. 4 and FIG. 4A at the same time. 4 is a cross-sectional view and a ray path diagram of a static light collecting device 200b according to an embodiment of the present invention, and FIG. 4A is a structural view of a static light collecting device 200b according to still another embodiment of the present invention. 4 shows that the static light collecting device 200b includes a plurality of light collecting units stacked on each other, and the plurality of light collecting units includes a first light collecting unit 600 and a second light collecting unit 600a. The first light collecting unit 600 is the combination of the light transmitting body 300 and the inverted cone 500 described above, and the second light collecting unit 600a is the light transmitting body 300 described above. When the first light collecting unit 600 is stacked on the second light collecting unit 600a, the inverted cone 500 is adapted to be placed inside the hollow portion 400. As described above, since the volume of the inverted cone 500 is smaller than the volume of the hollow portion 400, there is a gap 610 between the inverted cone 500 and the inner side wall 410. 4A shows that a plurality of first light collecting units 600 are stacked on the second light collecting unit 600a. The outer side walls 330 of the light collecting units 600 and 600a are connected to each other to form a smooth surface, and are formed in a funnel shape.

FIG. 5 is a structural diagram of a static light collecting device 200c according to still another embodiment of the present invention. The first light incident surface 310 of the first light collecting unit 600 is an inclined surface 310a, and the inclined surface 310a is at an acute angle with the horizontal surface 310. FIG. 5A is a cross-sectional view and a light transmission path diagram of a static light collecting device 200c according to an embodiment of the present invention. In the static light collecting device 200c of the present invention, the sunlight enters the static light collecting device 200c from the inclined surface 310a, and is emitted from the lowest first light emitting surface 320. When the sunlight has azimuth and elevation angle change, the first light collecting unit 600 of the static light collecting device 200b adds an inner height 311, and after the first light incident surface 310 becomes the inclined surface 310a from the horizontal plane, When the sunlight is small (incident angle of incidence), it is less likely to form total reflection on the inclined surface, and the light path entering the static light collecting device 200c will be closer to the axis of symmetry. Therefore, the static light collecting device 200c can not only collect sunlight more efficiently, but also make the light more concentrated and the light collecting efficiency is better.

FIG. 5B is a graph showing the collection efficiency of the static light collecting device 200c according to an embodiment of the present invention. We compare three sets of data, when the incident angle of sunlight is 0 to 15 degrees, and the ratio of the height of the inner height 311 to the length of the horizontal plane 310 is 0:20, it is equivalent to the static light collecting device 200b of the present invention. . The static light collecting device 200b has the highest efficiency when the incident angle is 0 degrees, but as the angle increases, the efficiency also drops drastically, and the total energy integration result collected from 0 to 15 degrees of the incident angle is 350%. When the incident angle of sunlight is 0 to 15 degrees, and the ratio of the height of the inner height 311 to the length of the horizontal plane 310 is 2:20, l, the efficiency has also dropped sharply, but it has been slower than the original, and the total energy integration result collected from 0 to 15 degrees is 395%, which is more efficient. When the incident angle of sunlight is 0 to 15 degrees, and the ratio of the height of the inner height 311 to the length of the horizontal plane 310 is 6:20, it has the lowest light collecting efficiency in the three sets of data at 0 degrees, but increases with the angle. The rate of decline in efficiency is relatively slow, and the total energy integration result collected from 0 to 15 degrees is 380%, and the energy collection thereof is relatively stable.

FIG. 6 is a structural diagram of a static light collecting device 200d according to an embodiment of the present invention. The static light collecting device 200d of the present invention includes a plurality of triangular prisms 700. Referring to FIG. 6A at the same time, it is a structural diagram of a triangular prism 700 according to an embodiment of the present invention. The triangular prism 700 has a third light incident surface 710, a bottom surface 730, and a side surface 720. The third light incident surface 710, the bottom surface 730, and the side surface 720 are adjacent to each other. The side surface 720 is parallel to the axis of symmetry 210, and the bottom surface 730 is disposed on the first light incident surface 310 of the first light collecting unit 600, and is perpendicular to the side surface 720, and the bottom surface 730 is perpendicular to the side surface 720. The triangular prisms 700 are centered on the axis of symmetry 210 and are symmetrically arranged on both sides. The side 720 of the triangular prism 700 faces the side 720a of the other triangular column 700a, and the two sides 720, 720a are arranged in parallel with each other, and the bottom surfaces 730 are connected to the first light collecting unit 600. The first light incident surface 310. The sunlight enters the static light collecting device 200d from the third light incident surface 710, and is emitted from the first light emitting surface 320 of the second light collecting unit 600a. In this embodiment, when the sunlight has only an elevation angle change (for example, when the position is at the equator), the triangular prisms are arranged in a single direction. At this time, the static light collecting device is changed due to the azimuth change of the light. The 200d will collect sunlight more efficiently.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

1‧‧‧Learly single-layer reflector

200, 200a, 200b, 200c, 200d‧‧‧ static light collecting device

210‧‧‧Axis of symmetry

300‧‧‧Lighting body

300a‧‧‧Cut truncated cone

310, 310a‧‧‧ first light surface

311‧‧‧ inside height

320‧‧‧The first glazing

330‧‧‧Outer side wall

400‧‧‧ Hollow

401‧‧‧ first top

410‧‧‧ inner side wall

420‧‧‧ Round caliber

500‧‧‧ inverted cone

501‧‧‧Top

510‧‧‧ round bottom

530‧‧‧ Cone

600‧‧‧First light unit

600a‧‧‧Second light collection unit

610‧‧‧ gap

700‧‧‧Triangular column

710‧‧‧ Third light surface

720‧‧‧ side

730‧‧‧ bottom

R1, R2, R3, R4‧‧‧ ray path

θ ₁ ‧‧‧ outside angle

θ ₂ ‧‧‧ inside angle

Figure 1 is a concentrator of the prior art.

Fig. 1A is a sunflower chasing instrument of the prior art.

2 is a structural diagram of a static light collecting device according to an embodiment of the present invention.

2A is a cross-sectional view and a ray path diagram of a static light collecting device cut along a symmetry axis according to an embodiment of the present invention.

FIG. 3 is a structural diagram of a static light collecting device according to an embodiment of the present invention.

3A is a cross-sectional view and a ray path diagram of a collecting yoke along an axis of symmetry according to an embodiment of the present invention.

4 is a cross-sectional view and a ray path diagram of a static light collecting device cut along a symmetry axis according to an embodiment of the present invention.

4A is a structural diagram of a static light collecting device according to an embodiment of the present invention.

FIG. 5 is a structural diagram of a static light collecting device according to an embodiment of the present invention.

FIG. 5A is a schematic diagram of a static light collecting device along an axis of symmetry according to an embodiment of the present invention; Cut profile and light transmission path diagram.

FIG. 5B is a graph showing the collection efficiency of a static light collecting device according to an embodiment of the present invention.

Figure 6 is a structural view of a static light collecting device including a triangular prism according to an embodiment of the present invention.

Fig. 6A is a structural view of a triangular prism according to an embodiment of the present invention.

200‧‧‧Static light collecting device

210‧‧‧Axis of symmetry

300‧‧‧Lighting body

300a‧‧‧Cut truncated cone structure

310‧‧‧The first entrance

320‧‧‧The first glazing

330‧‧‧Outer side wall

400‧‧‧ Hollow

401‧‧‧ first top

410‧‧‧ inner side wall

420‧‧‧ Round caliber

Claims (11)

A static light collecting device, comprising: a light-transmitting body, which is a truncated cone-shaped structure, the truncated cone structure has an axis of symmetry; the light-transmitting body has a first light-incident surface, An outer side wall, a first light-emitting surface and a hollow portion, wherein the first light-incident surface is located on a bottom surface of the truncated cone structure, the first light-emitting surface is located on a bottom surface of the truncated cone structure, and the outer side a wall is connected between the first light incident surface and the first light emitting surface, and the hollow portion is a conical shape disposed at a center of the light transmitting body, the hollow portion having a first position on the symmetry axis a top end, and is located at a center point of the first light-emitting surface; and the hollow portion has an inner side wall opposite to the other side of the outer side wall, which is disposed at a sidewall position of the conical shape of the hollow portion; An inverted cone having a circular bottom surface and a top end, wherein the circular bottom surface is connected to the first light emitting surface of the light transmitting body, the top end is disposed on the symmetry axis, wherein the light is caused by the first Entering the light surface into the light transmitting body After the first projection to further totally reflected by the outer wall to the inner sidewall, the inner sidewall by a second total reflection, the direction away from the first surface and the light emitted from the first light emitting surface. The static light collecting device of claim 1, wherein the hollow portion has a circular diameter, and the circular opening is formed in a central region of the first light incident surface. The static light collecting device of claim 1, wherein the first light entering The surface is a horizontal plane, and the first light-incident surface and the inner side wall of the hollow portion form an external angle, the first light-emitting surface is a horizontal plane, and the first light-emitting surface and the tapered surface of the inverted cone Forming an inner angle, wherein the outer angle and the inner angle are both acute angles. The static light collecting device of claim 2, wherein an area of the circular bottom surface of the inverted cone is less than or equal to an area of the circular diameter of the hollow portion. The static light collecting device of claim 1, further comprising an anti-reflection layer covering the first light incident surface of the light transmitting body. A static light collecting device includes a plurality of light collecting units stacked on each other, the plurality of light collecting units comprising: a first light collecting unit, comprising: a first light transmitting body, which is a truncated cone structure The first truncated cone structure has a first symmetry axis; the first light transmissive body has a first light incident surface, a first outer sidewall, a first light exit surface, and a first hollow portion, the first inlet a smooth surface is located on a bottom surface of the truncated cone structure, the first light emitting surface is located on a bottom surface of the truncated cone structure, and the first outer sidewall is connected to the first light incident surface and the first light emitting surface And the first hollow portion is a conical shape disposed at a center of the first light transmitting body, the first hollow portion having a first top end on the first symmetry axis and located at the first a first inner portion of the light emitting surface; and the first hollow portion has a first inner side wall opposite to the other side of the first outer side wall, and is disposed at a side wall position of the conical outer shape of the first hollow portion; An inverted cone having a circular bottom surface and a top end, wherein the circular bottom surface is connected to the first light emitting surface of the first light transmitting body, the top end is disposed on the first symmetry axis; and a second set The light unit is disposed under the first light collecting unit, and includes: a second light transmitting body, which is a truncated cone structure, the truncated cone structure has a second axis of symmetry; The second light-transmissive body has a second light-incident surface, a second outer sidewall, a second light-emitting surface and a second hollow portion, the second light-incident surface is located under the truncated cone structure, the second surface The light emitting surface is located on the bottom surface of the truncated cone structure, and the second outer side wall is connected between the second light incident surface and the second light emitting surface, and the second hollow portion is disposed on the second surface a central conical shape of the light transmissive body, the second hollow portion has a second top end on the second symmetry axis and is located at a center point of the second illuminating surface; and the second hollow portion has a relative a second inner side wall of the other side of the second outer side wall a sidewall position of the conical shape of the second hollow portion, wherein when the first light collecting unit is stacked on the second light collecting unit, the inverted cone is adapted to be inserted into the second hollow portion, and the pouring There is a gap between the cone and the second inner side wall. The static light collecting device of claim 6, wherein the first outer side wall of the first light transmitting body and the second outer side wall of the second light transmitting body are coupled to each other to form a smooth surface. The static light collecting device of claim 6, wherein the first light incident surface is a horizontal plane, and the first light incident surface and the inner side wall of the hollow portion form an external angle, the first The light exiting surface is a horizontal plane, and the first light emitting surface and the tapered surface of the inverted cone form an inner angle, wherein the outer angle and the inner angle are both acute angles. The static light collecting device of claim 6 further includes a plurality of triangular columns, each triangular column having a third light incident surface, a bottom surface and a side surface, the third light incident surface and the bottom surface And the side faces are adjacent to each other, the side surface is parallel to the first axis of symmetry, and the bottom surface is disposed on the first light incident surface of the first light collecting unit and perpendicular to the side surface. The static light collecting device of claim 9, wherein the triangular prisms are symmetrically arranged on both sides centering on the first axis of symmetry. The static light collecting device of claim 6, wherein the first light incident surface of the first light collecting unit is an inclined surface, and the inclined surface is at an acute angle with the horizontal plane.