KR101171006B1 - Greenhouse provided with a film sheet for area focusing of sun light - Google Patents

Abstract

Provided is a film member for surface condensing and a vinyl house having the same. The film member includes i) a film having a rectangular shape, and ii) a plurality of prism assemblies formed in one direction on one surface of the film. One prism assembly of the plurality of prism assemblies comprises: i) one or more first prism units comprising a plurality of first prisms having substantially the same angle of inclination with each other, and ii) mutually neighboring, and substantially mutually, first prism units. And one or more second prism units including a plurality of second prisms having the same tilt angle. The width of the first prism unit is substantially the same as the width of the second prism unit, and the inclination angle of the first prism of one of the plurality of first prisms is different from the inclination angle of the second prism of one of the plurality of second prisms The light incident on the prism assembly is applied to be focused.

Description

GREENHOUSE PROVIDED WITH A FILM SHEET FOR AREA FOCUSING OF SUN LIGHT}

The present invention relates to a vinyl house provided with a film member, and more particularly, to a vinyl house provided with a film member for surface light collection.

Recently, due to resource depletion and rising resource prices, research and development of clean energy is being actively conducted. Examples of clean energy include solar energy, wind energy and tidal energy. In particular, research and development are being actively conducted to save resources by efficiently using solar energy.

In order to use solar energy efficiently, it is important to increase the light collecting efficiency of sunlight. Therefore, a Fresnel lens that can improve the light collection efficiency of sunlight has been developed and used. Fresnel lenses are made to have a single focus of point focusing. In this case, the beam intensity has a Gaussian distribution. That is, the intensity of the beam is the greatest at the center of the plane where the focal point is located, and the intensity of the beam is weakened toward the edge thereof.

An object of the present invention is to provide a film member capable of efficiently condensing sunlight. Another object of the present invention is to provide a vinyl house having the film member described above.

The film member according to an embodiment of the present invention includes: i) a film having a rectangular shape, and ii) a plurality of prism assemblies formed extending in one direction on one surface of the film. One prism assembly of the plurality of prism assemblies comprises: i) one or more first prism units comprising a plurality of first prisms having substantially the same angle of inclination with each other, and ii) mutually neighboring, and substantially mutually, first prism units. And one or more second prism units including a plurality of second prisms having the same tilt angle. The width of the first prism unit is substantially the same as the width of the second prism unit, and the inclination angle of the first prism of one of the plurality of first prisms is different from the inclination angle of the second prism of one of the plurality of second prisms The light incident on the prism assembly is applied to be focused.

The film member according to an embodiment of the present invention further includes a third prism unit adjacent to the first prism unit and including one or more third prisms extending in one direction, wherein the first prism unit includes a second prism unit and It may be located between the third prism unit. The inclination angle of the at least one second prism of the plurality of second prisms may be greater than the inclination angle of the at least one first prism of the plurality of first prisms. The number of the plurality of second prisms may be greater than the number of the plurality of first prisms.

The height of the plurality of first prisms may be substantially the same as the height of the plurality of second prisms, and the length of the inclined surfaces of the plurality of first prisms may be greater than the length of the inclined surfaces of the plurality of second prisms. The one or more first prism units include a pair of first prism units, and the pair of first prism units may be symmetrically positioned with respect to the center line of the prism assembly parallel to one direction. And a non-condensing region including a centerline between the pair of first prism units, wherein the width of the non-condensing region may be substantially equal to the width of the first prism unit.

The width of the prism assembly may be 3 to 10 times the width of the surface condensing region. The film may further include a second surface facing in a direction opposite to a direction to which one surface faces, and may further include another plurality of prism assemblies formed extending in one direction on the other surface. The film member according to an embodiment of the present invention may further include a pair of cover films respectively covering a plurality of prism assemblies and another plurality of prism assemblies.

The vinyl house according to an embodiment of the present invention includes i) a support frame including a cover part, and ii) a film member covering the cover part. The film member comprises: i) a film comprising a rectangular shaped surface, and ii) a plurality of prism assemblies arranged adjacent to each other on the film. One prism assembly of the plurality of prism assemblies comprises: i) one or more first prism units comprising a plurality of first prisms having substantially the same angle of inclination with each other, and ii) mutually neighboring, and substantially mutually, first prism units. And one or more second prism units including a plurality of second prisms having the same tilt angle. The width of the first prism unit is substantially the same as the width of the second prism unit, and the inclination angle of the first prism of one of the plurality of first prisms is different from the inclination angle of the second prism of one of the plurality of second prisms The light incident on the prism assembly may be applied to be focused.

The plurality of first prisms and the plurality of second prisms may be formed to extend in a direction in which the vinyl house extends. The prism assembly may be formed in a circular shape, the second prism unit may surround the first prism unit, and the first prism unit and the second prism unit may have the same center. The inclination angle of the at least one second prism of the plurality of second prisms may be greater than the inclination angle of the at least one first prism of the plurality of first prisms. The number of the plurality of second prisms may be greater than the number of the plurality of first prisms. The height of the plurality of first prisms may be substantially the same as the height of the plurality of second prisms, and the length of the inclined surfaces of the plurality of first prisms may be greater than the length of the inclined surfaces of the plurality of second prisms.

The width of the prism assembly may be 3 to 10 times the width of the surface focused region. The cover part is formed in a curved surface, and each of the plurality of prism assemblies is positioned with curvature along its width direction, and the curvature may be inversely proportional to the width of the surface condensing area.

Using the film member, a lens pattern requiring a plurality of focal points can be easily formed on one sheet of film. As a result, the productivity of the film member can be improved, the manufacturing cost thereof can be minimized, and transportation and handling are convenient. Moreover, the light condensing efficiency of sunlight can be improved significantly using a film member.

When the film member is applied to the solar cell, the surface light is condensed so that the light intensity distribution is constant in a specific region, and thus the light collecting efficiency of the solar cell can be improved. As a result, the structure can be simplified compared with the point-collecting Fresnel lens, and the manufacturing cost can be reduced while improving the appearance. In addition, the deterioration of the solar cell can be prevented to increase the life of the solar cell. In addition, in the plastic house provided with the film member, the amount of light shining on a specific area may be kept relatively uniform. As a result, it is possible to increase the growth rate and yield of crops grown in the plastic house.

1 is a schematic partial perspective view of a film member according to a first embodiment of the present invention.
FIG. 2 is a schematic enlarged cross-sectional view of the prism assembly of FIG. 1. FIG.
3 to 5 schematically show the surface condensing mechanism of the film member.
6 is a schematic partial perspective view of a film member according to a second embodiment of the present invention.
FIG. 7 is a view schematically illustrating a planar structure and a cross-sectional structure corresponding to the circular prism assembly of FIG. 6.
8A to 8F illustrate various modifications of the partial cross-sectional structure of the film member of FIG. 1.
9 is a schematic perspective view of a vinyl house with a film member of FIG. 1.
10 is a schematic internal cross-sectional view of the vinyl house of FIG.
FIG. 11 is a schematic perspective view of a solar light collecting device including the film member of FIG. 3.
12 is a graph measuring the intensity of light passing through the film member according to an embodiment of the present invention.
13 is a graph measuring the intensity of light passing through the film member according to the prior art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the singular forms “a,” “an,” and “the” include plural forms as well, unless the phrases clearly indicate the opposite. As used herein, the term "comprising" embodies a particular characteristic, region, integer, step, operation, element, and / or component, and other specific characteristics, region, integer, step, operation, element, component, and / or group. It does not exclude the presence or addition of.

Unless defined otherwise, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Commonly defined terms used are additionally interpreted to have a meaning consistent with the related technical literature and the presently disclosed contents, and are not interpreted in an ideal or very formal sense unless defined.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

1 is a partial perspective view schematically showing a film member 100 according to a first embodiment of the present invention. The structure of the film member 100 of FIG. 1 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the structure of the film member 100 may be variously modified.

As shown in FIG. 1, the film member 100 includes a film 10 and a prism assembly 12. In addition, the film member 100 may further include other components as necessary.

The film 10 may be manufactured in a thin shape by using a resin such as polymethylmethacrylate (PMMA) or polycarbonate (polycarbonate). When the optically transparent material is used in the wavelength range of 300 nm to 1700 nm as the material of the film 10, solar energy may be more efficiently used. If it is out of the above-mentioned wavelength range, light loss occurs. The film 10 has a rectangular shape, and forms a prism assembly 12 having a rectangular shape on the film 10. Although FIG. 1 shows three prismatic assemblies 12 formed on the film 10, in practice, a larger number of prismatic assemblies may be formed on the film 10. Meanwhile, although FIG. 1 illustrates that the film 10 and the prism assembly 12 are formed separately, the film 10 and the prism assembly 12 may be integrally formed together.

As shown in FIG. 1, the plurality of prism assemblies 12 are located adjacent to each other along the x-axis direction. In addition, each prism assembly 12 is formed on the film in one direction, that is, along the y-axis direction. Therefore, the prism assembly 12 emits incident light linearly to condense the surface, and thus, when the prism assembly 12 is used in a solar light collecting device or a vinyl house, the light utilization efficiency is increased.

FIG. 2 is a diagram schematically showing an enlarged cross-sectional structure of the prism assembly 12 of FIG. 1.

As shown in FIG. 2, the prism assembly 12 includes a first prism unit 121, a second prism unit 123, a third prism unit 125, and a fourth prism unit 127. Here, the non-condensing region 129 is located at the center of the film member 100, and the second prism unit 123 and the third prism unit 125 are symmetrically formed on the left side (not shown) of the non-condensing region 129. The fourth prism unit 127 and the fifth prism unit 129 may be located. The prism is not formed in the non-condensing region 129 so that light incident on the center of the prism assembly 12 is directly incident on the condensing surface.

The first prism unit 121 includes a plurality of first prisms 1211. The plurality of first prisms 1211 have substantially the same angle of inclination α1. Here, the inclination angle α1 means an angle between the inclined surface 1211a of the first prism 1211 and the plate surface 101 of the film 10. Meanwhile, the second prism unit 123 is adjacent to the first prism unit 121 and includes a plurality of second prisms 1231. The plurality of second prisms 1231 may have substantially the same angle of inclination α2.

In addition, the third prism unit 125 is adjacent to the first prism unit 121 and includes a plurality of third prisms 1251. The plurality of third prisms 1251 may have substantially the same angle of inclination α3. The fourth prism unit 127 is adjacent to the second prism unit 123 and includes a plurality of fourth prisms 1271. The plurality of fourth prisms 1271 have substantially the same angle of inclination α4 as each other. Meanwhile, the first prism unit 121, the second prism unit 123, the third prism unit 125, and the fourth prism unit 127 each have first prisms 1211 and second prisms having the same shape. 3123, third prisms 1251, and fourth prisms 1271, the incident light is refracted at the same angle to be emitted. The first prisms 1211, the second prisms 1231, the third prisms 1251 and the fourth prisms 1271 extend in one direction, that is, along the y-axis direction.

Meanwhile, the first prism 1211, the second prism 1231, the third prism 1251, and the fourth prism 1271 are the first inclined surface 1211a, the second inclined surface 1211b, and the third inclined surface 1211c, respectively. ) And a fourth inclined surface 1211d. Here, the length l1 of the first slope 1211a, the length l2 of the second slope 1211b, the length l3 of the third slope 1211c, and the length l4 of the fourth slope 1211d are The closer to the non-condensing area 129, the longer it becomes. That is, the relationship of l3> l1> l2> l4 is satisfied.

Further, the first inclination angle α1 and the first formed by the first prism 1211, the second prism 1231, the third prism 1251, and the fourth prism 1271 and the plate surface 101 of the film 10, respectively. The second inclination angle α2, the third inclination angle α3, and the fourth inclination angle α4 become larger as they move away from the non-condensing area 101. For example, the second inclination angle α2 of the second prism 1231 is larger than the inclination angle α1 of the first prism 1211.

As shown in FIG. 2, the first prism 1211, the second prism 1231, the third prism 1251, and the fourth prism 1271 are all substantially the same in height h. Therefore, the number of prisms 1211, 1231, 1251, and 1271 included in the prism units 121, 123, 125, and 127, respectively, indicates that the prism units 121, 123, 125, and 127 are non-condensing areas 129. The further away from you, the greater. For example, the number of the plurality of second prisms 1231 is greater than the number of the plurality of first prisms 1211.

FIG. 3 schematically shows the operating state of the prism assembly 12 of FIG. 1. The operating state of the prism assembly 12 of FIG. 1 is merely for illustrating the present invention, but the present invention is not limited thereto. Therefore, the operating state of the prism assembly 12 can be modified in various forms.

As shown in FIG. 3, a pair of first prism units 121, a pair of second prism units 123, a pair of third prism units 125, and a pair of fourth prisms The units 127 are located symmetrically about a centerline C passing through the center of the prism assembly 12. That is, based on the non-condensing area 129, a pair of first prism units 121, a pair of second prism units 123, a pair of third prism units 125, and a pair Fourth prism units 127 are positioned symmetrically. Here, the non-condensing region 129 includes a center line C. Width w1 of the first prism unit 121, width w2 of the second prism unit 123, width w3 of the third prism unit 125, and width w4 of the fourth prism unit 127. ) And the width w5 of the non-condensing region 129 are substantially the same.

As shown by the arrow in FIG. 3, the light incident on the prism assembly 12 is condensed into the surface condensing region a. That is, since the light is focused on the surface instead of being collected by the point, the surface condensing region a having a predetermined area is formed. As a result, when used for condensing a solar cell or a vinyl house having a certain area, it is possible to maximize the light utilization efficiency.

Here, the width 2w1 + 2w2 + 2w3 + 2w4 + w5 of the prism assembly 12 may be 3 to 10 times the width w1002 of the surface condensing region 1002. Since condensing is made to be the same width as each width, in order to narrow the condensing area, the width of the prism assembly must be reduced in proportion to the condensing area. Therefore, the width w1002 of the surface condensing area 1002 is maintained in the above-described range. Hereinafter, the surface light collecting mechanism of the film member 100 (shown in FIG. 1) will be described in more detail with reference to FIGS. 4 and 5.

4 schematically shows the surface condensing mechanism of the film member 100 (shown in FIG. 1). In FIG. 4, the traveling path of the light is indicated by a dotted line. For convenience, only one prism 1251, 1121, and 1231 per one prism unit is shown in FIG. 4, and the rest of the prisms are omitted.

As shown in FIG. 4, light incident on the prisms 1251, 1211, and 1231 is refracted and collected at the focal point F2. On the other hand, light may be collected at the focal point F2 by other prisms positioned at positions other than the prisms 1251, 1211, and 1231. That is, by processing the angles of the prisms 1251, 1211, and 1231 differently, the light passing through the prism can be focused on one focal point F2.

When the inclination angles α1, α2, and α3 of the prisms 1251, 1211, and 1231 are designed to become larger at the center, that is, from the left to the right, the light may be collected at the focal point F2. Conversely, when the prisms 1251, 1211, 1231 are designed such that they all have the same inclination angles α1, α2, α3, the light is refracted at the same angle, so that no light gathers at the focal point F2. As mentioned above. Since the plurality of prisms 1251, 1211, and 1231 have different refractive angles β1, β2, and β3, light may be collected at the focal point F2.

On the other hand, the light incident on the prisms included in each prism unit and having the same shape as each other is refracted at substantially the same angle to each other and irradiated to the light collecting surface. Therefore, the light converging region has a substantially uniform light intensity distribution. As a result, light can be condensed by the prism for each prism unit having mutually different inclination angles while maintaining the light intensity distribution uniformly by the prisms having the same shape included in each prism unit. As a result, it is possible to form the surface condensing region in which the light intensity distribution is kept uniform.

FIG. 5 is a graph schematically showing the condensing intensity of the prism assembly 12 of FIG. 4. In the enlarged circle of FIG. 5, the cross-sectional structure of the prism assembly 12 is enlarged and shown.

As shown in FIG. 5, the light incident on the prism assembly 12 is refracted and superimposed on the condensing surface. As a result, light is condensed while the light overlaps each other over the AB region. In addition, since the prisms 1211, 1231, 1251, and 127 (shown in FIG. 4) included in each of the prismatic units 121, 123, 125, and 127 (shown in FIG. 3) have the same shape, they are uniform. The light can be collected to have one intensity. Since the light is condensed while overlapping, it is possible to have a uniform light intensity distribution than to focus the light.

As shown in FIG. 5, light incident through the respective prism units 121, 123, and 125 (shown in FIG. 3) overlaps the line segment AB corresponding to the surface condensing area 1002. As a result, the light intensity is uniformly distributed in the surface condensing region 1002 corresponding to the line segment AB, and the light intensity in the surface condensing region 1002 corresponding to the line segment AB is large. Here, the length of the line segment AB is the same as the length w1002 of the surface condensing region 1002.

On the other hand, since the prisms 121, 123, 125, and 127 (shown in FIG. 3) inside the prism units 121, 123, and 125 (shown in FIG. 3) all have the same shape, the light is all at the same angle. Refract and run parallel to each other. Although not shown in FIG. 5, since the left portion of FIG. 5 has a symmetrical shape, light may be focused on the same principle.

6 is a schematic partial perspective view of a film member 200 of a second embodiment of the present invention. The structure of the film member 200 of FIG. 6 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the structure of the film member 200 can be modified into other forms. In addition, since the structure of the film member 200 of FIG. 6 is similar to the structure of the film member 100 of FIG. 1, the same reference numeral is used for the same part, and the detailed description thereof is omitted.

As shown in FIG. 6, the film member 200 includes a film 10 and a plurality of circular prism assemblies 22. In addition, the film member 200 may further include other elements as necessary. The plurality of circular prism assemblies 22 are regularly arranged in an array form along the x-axis direction and the y-axis direction. Hereinafter, the circular prism assembly 22 of FIG. 6 will be described in more detail with reference to FIG. 7.

FIG. 7 schematically shows the planar structure and the corresponding cross-sectional structure of the circular prism assembly 22 of FIG. 6.

As shown in FIG. 7, the circular prism assembly 22 includes a first prism unit 221, a second prism unit 223, a third prism unit 225, a fourth prism unit 227, and a non-condensing region. 220. In addition, the circular prism assembly 22 may further include other components as necessary.

Prisms having substantially the same shape are formed toward the non-condensing area 220 in the first prism unit 221, the second prism unit 223, the third prism unit 225, and the fourth prism unit 227, respectively. do. Here, the first prism unit 221, the second prism unit 223, the third prism unit 225, and the fourth prism unit 227 all have the same center and are formed in a ring shape. The second prism unit 223 surrounds the first prism unit 221. Since the shapes of the prisms formed in each prism unit 221, 223, 225, and 227 are substantially the same as each other, the light incident on the circular prism assembly 22 is the same in each prism unit 221, 223, 225, 227. It is refracted toward the direction. Therefore, the intensity distribution of light can be adjusted uniformly. In addition, since the prisms included in the first prism unit 221, the second prism unit 223, the third prism unit 225, and the fourth prism unit 227 have different inclination angles from each other, light may be focused on the surface. Can be. Since the first prism unit 221, the second prism unit 223, the third prism unit 225, and the fourth prism unit 227 all have a ring shape, the light is surface-condensed in a circular shape.

8A to 8F illustrate various modifications of the partial cross-sectional structure of the film member 100 of FIG. 1. The cross-sectional structure of the film members 110, 120, 130, 140, 150, 160 of FIGS. 8A-8F is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the cross-sectional structure of the film member 100 may be modified in various forms. 8A to 8F show only a pair of prism units of the film member 100 for convenience.

As shown in FIG. 8A, the film member 110 includes a film 10 and a prism assembly 11. The prism assembly 11 is located on the film 10. An adhesive may be used to attach the prism assembly 11 onto the film 10. The adhesive may attach the prism assembly 11 onto the film 10 using a detachable liner. The prism assembly 11 may be made of a transparent polymer containing silicon, for example, an invisisil material, and then attached onto the film 10 made of glass.

At the center of the prism assembly 13, a convex prism is located upwards, and the surrounding prisms face the centrally located prism. The prism assembly 13 extends in one direction to collect light. Meanwhile, the film 10 and the prism assembly 11 may be integrally formed. That is, since the film member 110 can be molded in large quantities using a method such as mold, embossing or hot pressing, the film member 110 can be manufactured in a short time at low cost. The thickness of the film member 110 may be 50 μm to 300 μm. If the thickness of the film member 110 cannot be made too small on the basis of design conditions, and the thickness of the film member 110 is too large, the film member 110 is hardly bent, and hence workability is lowered.

Meanwhile, as shown in FIG. 8B, as another modification, the film member 120 includes the film 10 and the prism assemblies 11. The prism assemblies 11 are located above and below the top surface of the film 10. That is, the prism assemblies 11 are formed on the upper surface of the film 10, that is, the other surface facing away from the direction toward which the upper plate surface faces, that is, the lower surface of the film 10. In this case, the film member 120 may be manufactured using a manufacturing cost almost the same as the manufacturing cost of the film member 110 of FIG. 8A. The prism assembly 11 shown in FIG. 8B is the same as the prism assembly 11 shown in FIG. 8A. The film 10 and the prism assembly 11 can also be extruded in one piece at high speed by pressing resin or the like.

As shown in FIG. 8C, another film member 130 includes a film 10, a prism assembly 11, and a cover film 13. Since the film 10 and the prism assembly 11 of FIG. 8C are the same as the film 10 and the prism assembly 11 of FIG. 8A, the same reference numerals are used. The film 10 and the prism assembly 11 may be integrally formed. When the prism assembly 11 is exposed to the outside, it may be damaged by the impact. Therefore, a pair of cover films 13 are used to cover and protect each prism assembly 11.

As shown in FIG. 8D, the film member 140 includes a film 10 and a prism assembly 14. Prismatic assembly 14 is located above film 10. Prisms included in the prism assembly 14 face outward from the center. Even if the prisms face outward from the center, the light may be refracted and equally focused. On the other hand, the film 10 and the prism assembly 14 may be integrally formed.

Meanwhile, as shown in FIG. 8E, the film member 150 includes a film 10 and prism assemblies 14. The prism assemblies 14 are located above and below the top surface of the film 10. Since the prism assembly 14 shown in FIG. 8E is the same as the prism assembly 14 shown in FIG. 8D, the same reference numerals are used. The film 10 and the prism assembly 11 can also be extruded in one piece at high speed by pressing resin or the like.

As shown in FIG. 8F, the film member 160 includes a film 10, a prism assembly 14, and a cover film 15. Since the film 10 and prism assembly 14 of FIG. 8F are the same as the film 10 and prism assembly 14 of FIG. 8D, they are shown using the same reference numerals. The film 10 and the prism assembly 14 may be integrally formed. If the prism assembly 14 is exposed to the outside, it can be damaged by the impact. Thus, a pair of cover films 15 are used to cover and protect each prism assembly 14.

9 is a schematic perspective view of the vinyl house 1000 having the film member 100 of FIG. 1. The structure of the vinyl house 1000 of FIG. 9 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the structure of the vinyl house 1000 may be modified differently.

As shown in FIG. 9, the vinyl house 1000 includes a support frame 170 and a film member 100. Since the film member 100 of FIG. 9 is the same as the film member 100 of FIG. 1, it displays using the same code | symbol. On the other hand, the structure of the vinyl house 1000 of Figure 9 is merely for illustrating the present invention, the present invention is not limited thereto. Therefore, the structure of the vinyl house 1000 may be variously modified.

As shown in FIG. 9, the support frame 170 serves as a skeleton of the vinyl house 1000. Therefore, after the support frame 170 is erected on the magnetic surface, the support frame 170 is covered with the film member 100. The film member 100 may be rolled and stored in a roll or roll form. On the other hand, the support frame 170 includes a cover 1701 covered by the film member 100. The cover 1701 may be manufactured to be curved by bending a pipe or the like in a curved shape.

Since the film member 100 includes a plurality of prisms (not shown), light may be efficiently collected. The plurality of prisms (not shown) extend in the y-axis direction, that is, the direction in which the vinyl house 1000 extends. Therefore, when the plurality of cultivated areas in which the crops grow inside the vinyl house 1000 and the roads through which people can pass are made, the light is focused only on the cultivated areas where the crops grow except for the roads. Growth conditions, ie crop growth and yield can be better controlled. Shadows form on the road. Hereinafter, this will be described in more detail with reference to FIG. 10.

FIG. 10 schematically shows an internal cross section of the vinyl house 1000 of FIG. 9. The internal cross-sectional structure of the vinyl house 1000 of FIG. 10 is merely for illustrating the present invention, but the present invention is not limited thereto. Therefore, the internal cross-sectional structure of the vinyl house 1000 may be modified differently.

As shown in FIG. 10, the film member 100 covering the vinyl house 1000 includes a plurality of prism assemblies 14. The light collected by the prism assembly 14 is focused only on the cultivation region 1004 of the crop. For example, as shown in FIG. 10, when the five cultivation regions 1004 are spaced apart from each other, and the vinyl house 1000 is covered with the five prism assemblies 14, each prism assembly 14 is provided. Creates a surface condensing region 1002 corresponding to each cultivation region 1004. Accordingly, since light is concentrated only on the cultivation areas 1004, the yield of crops such as fruits, vegetables, and flowers located in the cultivation areas 1004 may be increased. As described above, it is preferable that the width of the cultivation region 1004 and the width w1002 of the surface condensing region 1002 are substantially the same.

In winter the temperature is very low and the intensity of sunlight is not high. Therefore, a greenhouse is used to protect plants from cold water. In the case of using the vinyl house 1000, light may be collected and emitted only to a specific area.

Photosynthesis of crops does not occur in the absence of light. The photosynthesis of crops increases in proportion to the intensity of light, and after a certain stage in photosynthesis, the absorption of carbon dioxide and the release of oxygen no longer appear in the crop's appearance. The intensity of light at this stage is called the optical compensation point. When the intensity of light increases beyond the photocompensation point, the photosynthetic rate does not increase in proportion to the intensity of light. The intensity of light at this stage is called the light saturation point. Factors other than light may limit the rate of photosynthesis. Photosaturation point depends on the type of crop. As a result, the intensity of light can be adjusted by distinguishing between crops that prefer strong light and crops that like weak light.

For example, watermelons, taro, and tomatoes are examples of crops that prefer strong light. Watermelon and taro have a light saturation point of 80klx and tomato 70klx. Cucumbers, turnips, zucchini, celery, strawberries, eggplant, cabbage, cabbage and peas are examples of moderate light favorite crops. Cucumbers and turnips have a light saturation point of 55klx, pumpkins and celery have a light saturation point of 45klx, and strawberries, eggplant, cabbage, cabbage, and peas have a light saturation point of 40klx. On the other hand, green peppers, kidney beans and lettuce are examples of the crops that favor weak light. Bell peppers have a light saturation point of 30klx, and kidney beans and lettuce have a light saturation point of 250klx. The intensity of light varies with the season. The light intensity at the ground is 120klx, and at the vernal equinox or the autumn equinox, the light intensity is about 75klx. In addition, the intensity of light at the time of winter solstice is 30klx. Therefore, the intensity of light reaching the crop in the vinyl house 1000 is about 80 klx in the base, 50 klx in the vernal equinox or autumn, and 20 klx in the winter solstice. From the autumn equinox to the vernal equinox, the intensity of light cannot satisfy the photosynthesis of tomatoes, and when the winter sol is close, the photosynthesis of cucumbers or bell peppers that do not require strong light cannot be satisfied. Therefore, since it is preferable to control the intensity of light in a specific region according to the type of crop or the planted position of the crop in the vinyl house 1000, the intensity of light is controlled using the film member 100.

The prism assembly 14 is located with curvature along its width direction, that is, along the x-axis direction. Since the film member 100 is made of a flexible material, the prism assembly 14 may have a curvature. Here, the curvature is inversely proportional to the width w1002 of the surface condensing region 1002. In other words, as the curvature of the prism assembly 14 increases, the width w1002 of the surface condensing region 1002 becomes smaller. That is, the area | region of the area condensed by the prism assembly 14 becomes narrow. Meanwhile, the width w14 of the prism assembly 14 may be 3 to 10 times the width w1002 of the surface condensing region 1002. If it is out of the above-described range, the light utilization efficiency may be greatly reduced. In addition, it is difficult to deviate from the above-described range in terms of the design structure of the prism assembly 14.

FIG. 11 is a schematic perspective view of the solar light collector 2000 having the film member 200 of FIG. 3. The structure of the solar light collecting apparatus 2000 of FIG. 11 is merely for illustrating the present invention, but the present invention is not limited thereto. Therefore, the structure of the solar light collecting apparatus 2000 may be variously modified.

As illustrated in FIG. 11, the solar light collecting apparatus 2000 includes a film member 200, a solar cell 201, a casing 203, and a heat sink 205. In addition, the solar light collecting apparatus 2000 may further include other components as necessary. The film member 200 provided above the casing 203 collects light and irradiates the solar cell 201. That is, as shown by the dotted arrows in FIG. 11, the light is surface-collected by the film member 200, and the solar cell 201 is positioned in the surface-collecting region, thereby maximizing photoelectric conversion efficiency due to condensing. . In addition, since local degradation of the solar cell 201 can be prevented, the life of the solar cell 201 becomes long. Light incident through the film member 200 is repeatedly uniformly incident on the light collecting surface of the solar cell 201, and all the light is overlapped and collected. Therefore, the collected light has a uniform light intensity distribution in the entire light collecting area. Meanwhile, in order to prevent deterioration of the solar cell 201 due to condensing, heat is radiated to the outside by providing a heat sink 205.

12 is a graph measuring the intensity of light passing through the film member according to an embodiment of the present invention, Figure 13 is a graph measuring the intensity of light passing through the film member according to the prior art. Hereinafter, the intensity of light passing through each of the film member and the film member according to the prior art will be described with reference to FIGS. 12 and 13.

The graph of FIG. 12 is obtained by injecting light into the film member in which the Fresnel lens pattern of the same shape as the film member of FIG. 1 was formed, and measuring the light intensity distribution. The upper side of FIG. 12 shows the cross-sectional structure of the film member of FIG. 1, and the lower side of FIG. 12 shows the light intensity distribution of the light condensing surface by the film member of FIG.

 As shown in FIG. 12, it can be seen that light intensity is largely displayed based on the center. That is, when the illuminance of the light refracted while passing through the film member using the digital illuminometer is measured for each point, the above-described result can be obtained.

That is, when using the film member of FIG. 12, light is surface condensed and light intensity distribution is uniform over the whole condensing surface. And when it is out of the light collecting surface, the light intensity is almost zero. The film member on which the prism is formed on the surface of the prism according to an embodiment of the present invention has less light loss than a general Fresnel lens and has a more uniform light intensity distribution than when light is focused with one focal point.

In contrast, as shown in FIG. 13, when light is incident on a Fresnel lens having only prisms having a general shape and the light intensity distribution is measured, the following results are obtained. Here, the prism is formed by simply adjusting the inclination angle. The upper side of FIG. 13 shows the cross-sectional structure of a general film member, and the lower side of FIG. 13 shows the light intensity distribution of the light condensing surface by the film member of FIG.

 As shown in FIG. 13, the light intensity appears large in the central region, but when away from the central region, the light intensity gradually decreases while showing a bell shape. In other words, the light exhibits a Gaussian distribution. Therefore, in the prior art, the light collection efficiency is low, and all parallel lights do not have a uniform light intensity distribution in a certain region of the light collecting surface.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

10. Film 11, 12, 14, 22. Prism assembly
13, 15.Cover film 101. Plate surface
100, 110, 120, 130, 140, 150, 160, 200. Film member
121, 123, 125, 127, 129, 221, 223, 225, 227, 229. Prism unit
170. Support Frame 1211, 1231, 1251, 1271. Prism
1211a, 1231a, 1251a, 1271a. Slope 1000. Vinyl House
1002. Condensing Area 1004. Cultivation Area
1701. Cover Section

Claims (18)

delete delete delete delete delete delete delete delete delete delete A support frame comprising a cover portion, and
Film member covering the cover part
As a vinyl house comprising:
The film member,
A film comprising one surface of a rectangular shape, and
A plurality of prism assemblies arranged adjacent to each other on the film
Including,
One prism aggregate of the plurality of prism aggregates,
At least one first prism unit comprising a plurality of first prisms having substantially the same tilt angle as each other, and
At least one second prism unit comprising a plurality of second prisms mutually adjacent to the first prism unit and having substantially the same tilt angle as each other
/ RTI >
The width of the first prism unit is substantially equal to the width of the second prism unit, and the inclination angle of the first prism of one of the plurality of first prisms is the second prism of one of the plurality of second prisms Different from the inclination angle of each of the plurality of prismatic aggregates are located along the first direction in which the vinyl house extends and are spaced apart from each other along a second direction crossing the first direction to cultivate each crop of crops located in the plastic house. Is applied to surface-concentrate and irradiate light incident on the prism assembly to a region,
The cover part is formed in a curved surface, wherein the plurality of prism assemblies are each positioned with a curvature along its width direction, the curvature is inversely proportional to the width of the surface condensing area. The method of claim 11,
And the plurality of first prisms and the plurality of second prisms extend along the first direction. The method of claim 11,
The prism assembly is formed in a circular shape, the second prism unit surrounds the first prism unit, and the first prism unit and the second prism unit have the same center. The method of claim 11,
And the inclination angle of the second prism of at least one of the plurality of second prisms is greater than the inclination angle of the first prism of at least one of the plurality of first prisms. 15. The method of claim 14,
And the number of the plurality of second prisms is greater than the number of the plurality of first prisms. 15. The method of claim 14,
The height of the plurality of first prisms is substantially the same as the height of the plurality of second prisms, the length of the inclined surfaces of the plurality of first prisms is greater than the length of the inclined surfaces of the plurality of second prisms. The method of claim 11,
And a width of the prism assembly is three to ten times the width of the surface condensed area. delete

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