WO2017168944A1 - Photocell blind and photocell blind system - Google Patents

Abstract

In this photocell blind, a first photocell module 22 is provided to a first outer surface part 12 of a photocell slat, and a second photocell module 24 is provided to a second outer surface part 14 of the photocell slat. The reflectance of light from the first photocell module 22 is set to be higher than the reflectance of light from the second photocell module 24. The reflectance of light from the first photocell module 22 is 70% or higher. The reflectance of light from the second photocell module 24 is 30% or lower.

Description

Photovoltaic blinds, photovoltaic blind systems

The present invention relates to a photovoltaic blind and a photovoltaic blind system including the same.

¡Blinds equipped with photoelectric conversion cells are known for the purpose of improving energy efficiency. For example, Patent Document 1 describes a blind including a solar cell module.

The blind described in Patent Document 1 includes a slat, a ladder cord extending in the vertical direction that holds the slat, and an elevating cord that moves the slat up and down, and the slat is provided with a solar cell module. .

JP 2014-136828 A

By the way, such a blind according to the prior art is often used by being installed on the indoor side of the wind glass or wall glass with one side facing the outside and the other side facing the room. Therefore, the indoor atmosphere is considered to be easily affected by the temperature increase of the blinds. For this reason, in summer, it is considered that the photoelectric conversion cell absorbs strong sunlight and the temperature rises significantly, thereby heating the indoor atmosphere and reducing the cooling efficiency. On the other hand, in the winter, it is expected that the photoelectric conversion cell absorbs sunlight and heats the indoor atmosphere, and a configuration that efficiently absorbs sunlight is desirable. In other words, conventional blinds have different desirable properties in summer and winter, and there is a problem that it is difficult to switch properties between summer and winter.

It is also conceivable to provide a glass wall on the indoor side of the blind in order to mitigate the influence on the indoor due to the temperature rise of the photoelectric conversion cell. However, in this case, the maintainability of the blind photoelectric conversion cell may be lowered.
In other words, the conventional blind has room for improvement from the viewpoint of enabling switching of properties between summer and winter while maintaining the maintainability of the photoelectric conversion cell.

An object of the present invention is to provide a photovoltaic blind technology that can be used by switching properties between summer and winter.

In order to solve the above-described problems, a photovoltaic blind according to an aspect of the present invention includes a photovoltaic slat in which a first photovoltaic module is provided on a first outer surface and a second photovoltaic module is provided on a second outer surface. The light reflectance of the first photovoltaic module is formed larger than the reflectance of the second photovoltaic module.

According to this aspect, since the photovoltaic blind has two types of photovoltaic modules having different reflectivities, the photovoltaic module facing the outdoor side can be used by switching between summer and winter.

In order to solve the above problems, a photovoltaic cell blind system according to another aspect of the present invention includes the above-described photovoltaic cell blind, a battery charged by at least one output current of the first photovoltaic module and the second photovoltaic module, and a battery. And a supply device for supplying electric power to an indoor electric device facing the photovoltaic cell blind.

According to this aspect, since the output of the photovoltaic module is consumed by the electrical equipment in the room facing the photovoltaic blind, the wiring from the photovoltaic blind is shortened, and the loss due to the wiring can be reduced.

According to the present invention, it is possible to provide a photovoltaic cell blind technology that can be used with its properties switched between summer and winter.

It is a front view of the blind which concerns on embodiment of this invention. It is a schematic diagram of the front view of the slat of the blind of FIG. It is sectional drawing of the side view of the slat of the blind of FIG. It is sectional drawing of the side view of another state of the slat of the blind of FIG. It is sectional drawing of the side view of the slat of the blind of FIG. It is a schematic diagram of the front view of a photovoltaic module. It is sectional drawing of the side view of a photovoltaic module. It is a schematic diagram which shows the wiring path | route of a photovoltaic cell module. It is a front view which shows another form of the blind of FIG. It is a schematic diagram of the photovoltaic cell blind system using the blind of FIG. It is a schematic diagram of the side view of the blind which concerns on a 1st modification. It is sectional drawing of the side view of the slat which concerns on a 2nd modification.

Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. The same or equivalent components and members shown in the drawings are denoted by the same reference numerals, and repeated descriptions are appropriately omitted. In addition, the dimensions of the members in each drawing are appropriately enlarged or reduced for easy understanding. Also, in the drawings, some of the members that are not important for describing the embodiment are omitted.

FIG. 1 is a front view of a blind 100 according to the embodiment. Hereinafter, description will be made based on the XYZ orthogonal coordinate system. The X-axis corresponds to the horizontal left-right direction, the Y-axis corresponds to the horizontal front-rear direction, and the Z-axis corresponds to the vertical up-down direction. The Y-axis direction and the Z-axis direction are each orthogonal to the X-axis direction. The X-axis direction may be referred to as the left direction or the right direction, the Y-axis direction may be referred to as the forward direction or the rear direction, and the Z-axis direction may be referred to as the upward direction or the downward direction. In FIG. 1, when viewing the blind 100 from the front, the right side is called right and the left side is called left.

The blind 100 according to the embodiment mainly includes a slat row 8, a head box 52, a bottom rail 54, a ladder cord 62, and a lift cord 64. The slat row 8 includes a plurality of slats 10 arranged in a comb shape in the vertical direction. The slats 10 are each formed in a horizontally long and substantially rectangular shape. The head box 52 is provided at the upper stage of the slat row 8 and constitutes the uppermost stage of the blind 100. For example, the head box 52 is fixed to a window frame not shown. A slat row 8 is connected to the lower side of the head box 52. The head box 52 incorporates an angle adjustment mechanism (not shown) and an elevating mechanism (not shown) of the slat 10. The bottom rail 54 is provided at the lower stage of the slat row 8 and constitutes the lowermost stage of the blind 100. The bottom rail 54 is connected to the lower side of the slat row 8. The ladder cord 62 is a cord member for adjusting the angle of the slat 10 of the blind 100. The ladder cord 62 is coupled to both sides in the width direction of the slats 10 of each step. The upper end of the ladder cord 62 is connected to an angle adjustment mechanism (not shown) in the head box 52. The lifting / lowering cord 64 is a cord member for folding and lifting the slat row 8 by pulling up the bottom rail 54 and opening and lowering the slat row 8 by lowering the bottom rail 54. The lower end of the lifting / lowering cord 64 is connected to the bottom rail 54 through the through hole 11 formed in the slat 10. The upper end of the lifting / lowering cord 64 is connected to a lifting / lowering mechanism in the head box 52.

(Slat)
FIG. 2 is a schematic diagram of the slat 10 as viewed from the front. For example, the front surface of the slat 10 may face the outside, and the back surface of the slat 10 may face the room. The slat 10 mainly includes a first outer surface portion 12, a second outer surface portion 14, a first photovoltaic cell module 22, and a second photovoltaic cell module 24. The slat 10 has a horizontally long rectangular outline having a long side 10a extending in the horizontal direction and a short side 10b extending in the vertical direction, and has a thin flat shape in the thickness direction. The longitudinal section of the slat 10 in a side view may be, for example, a rectangular shape. The first outer surface portion 12 constitutes one outer wall in the thickness direction of the slat 10, and the second outer surface portion 14 is a thin plate-like portion constituting the other outer wall. The first outer surface portion 12 and the second outer surface portion 14 are provided so as to face each other. In FIG. 2, the first outer surface portion 12 faces the front surface, and the second outer surface portion 14 faces the back surface. The slat 10 can adjust the angle of the side view so that the first outer surface portion 12 faces the back surface and the second outer surface portion 14 faces the front surface.

In the slat 10, the first photovoltaic module 22 is provided on the first outer surface portion 12, and the second photovoltaic module 24 is provided on the second outer surface portion 14. The first photovoltaic module 22 and the second photovoltaic module 24 are collectively referred to as the photovoltaic module 20. The photovoltaic module 20 includes a plurality of photovoltaic cells that use the photovoltaic effect to convert light energy into electric power. The photovoltaic module 20 is a module in which a plurality of photovoltaic cells are electrically connected in series and parallel to obtain necessary voltages and currents. The photovoltaic module 20 is formed thin. Photovoltaic cells are sometimes referred to as solar cells. The generated power of the photovoltaic module 20 may be guided to, for example, the head box 52 through a predetermined wiring and output from the head box 52 to a predetermined indoor wiring.

FIG. 3 is a sectional view in side view showing a part of the slat row 8. FIG. 4 is a cross-sectional view in side view showing a part of the slat row 8 in another state. 3 and 4 show a state in which a part of two slats 10 overlap in the Z-axis direction. That is, the lower part of the upper slat 10 overlaps the front side of the upper part of the lower slat 10. FIG. 3 shows a state in which the first outer surface portion 12 faces the front surface and the second outer surface portion 14 faces the rear surface. FIG. 4 shows a state in which the first outer surface portion 12 faces the back surface and the second outer surface portion 14 faces the front surface. As shown in FIG. 3, the core portion 16 has a first outer surface portion 12 having a convex shape and a second outer surface portion 14 having a concave shape. The slat 10 includes a core portion 16, a first photovoltaic module 22 laid on the first outer surface portion 12 constituting two outer surfaces of the core portion 16, and a second photovoltaic cell module 24 laid on the second outer surface portion 14. . The core portion 16 includes a first outer surface portion 12 and a second outer surface portion 14. A space is provided between the first outer surface portion 12 and the second outer surface portion 14. In particular, a hollow portion 15 is provided between the first outer surface portion 12 and the second outer surface portion 14. That is, the core portion 16 has a three-layer structure of the first outer surface portion 12, the hollow portion 15, and the second outer surface portion 14. The core part 16 can be formed from various resin materials and metal materials, for example. In the core portion 16 of the embodiment, the first outer surface portion 12 and the second outer surface portion 14 are integrally formed from a metal material such as an aluminum alloy or a magnesium alloy or a resin material. The core portion 16 may be formed by combining the first outer surface portion 12 and the second outer surface portion 14 that are separately formed. The core portion 16 can be formed by, for example, an extrusion process in which a metal material is strongly pressed and extruded from a die hole.

(Vent hole)
When the photovoltaic module 20 receives sunlight and becomes high temperature, its power generation efficiency may decrease. Therefore, in the slat 10 according to the embodiment, at least one of the first outer surface portion 12 and the second outer surface portion 14 is provided with a vent hole 30 communicating with the outside air. In particular, the vent hole 30 is formed so as to communicate with the outside air from the hollow portion 15. As shown in FIG. 2, the vent hole 30 includes a first vent hole 32 and a second vent hole 34 that are spaced apart in the short side direction (Z-axis direction). The first vent hole 32 and the second vent hole 34 may have, for example, a substantially rectangular shape or an oval shape such as an oval when viewed from the front. A plurality of the first vent holes 32 and the second vent holes 34 are provided separately from each other in the longitudinal direction (X-axis direction). When the air in the hollow portion 15 is heated, the first ventilation hole 32 and the second ventilation hole 34 draw outside air from one of the first ventilation hole 32 and the second ventilation hole 34 by convection and from the other. Can be discharged. As described above, the air in the hollow portion 15 is convected and exchanged with the outside air, whereby the core portion 16 and the photovoltaic module 20 are cooled, and the reduction in power generation efficiency of the photovoltaic module 20 can be alleviated. Moreover, the warm air discharged | emitted from the vent hole 30 flows also into the indoor side, and can contribute to the improvement of indoor heating efficiency.

Next, the shadow of the upper slat will be described. As shown in FIG. 5, the upper part of the slat 10 is covered with the lower part of the upper slat 10 h, and the shaded area 10 d of sunlight may be applied to that part. When the shade region 10d is applied to a part of the photovoltaic module 20, the amount of power generation at that part is reduced and the resistance is increased, which may reduce the output power of the entire photovoltaic module 20. Therefore, in the blind 100 of the embodiment, when the short side direction along the short side 10b of the slat 10 is set in the Z-axis direction, the one end 22e in the Z-axis direction that is the short side direction of the first photovoltaic module 22 is The second photovoltaic module 24 is located within the range 24g in the Z-axis direction. That is, when the first photovoltaic module 22 and the second photovoltaic module 24 are projected in the thickness direction of the slat, one Z-axis direction range is shifted toward either Z-axis direction with respect to the other Z-axis direction range. is doing. By comprising in this way, the non-laying area | region where a photovoltaic cell is not provided in the part corresponding to the shade area | region 10d can be formed. By forming the non-laying region in the shaded region 10d, it is possible to mitigate the influence of the increase in resistance of the photovoltaic module 20 caused by the shaded region 10d. Similarly, the one end 24e of the second photovoltaic module 24 in the Z-axis direction is located within the range 22g of the first photovoltaic module 22 in the Z-axis direction.

(Photovoltaic module)
Next, the photovoltaic module 20 will be described. FIG. 6 is a schematic front view of the photovoltaic module 20. The photovoltaic module 20 includes a plurality of photovoltaic submodules 21 arranged in the longitudinal direction, and the photovoltaic module submodule 21 includes a plurality of photovoltaic cells 23 arranged in an array. The photovoltaic cell 23 may be directly formed on the surface of the core portion 16 by means such as sputtering. The photovoltaic module 20 of the embodiment is formed by forming the photovoltaic cell 23 on a thin sheet having flexibility, and attaching the thin sheet on which the photovoltaic cell 23 is formed to the core portion 16. Such a configuration is common to the first photovoltaic module 22 and the second photovoltaic module 24.

FIG. 7 is a schematic diagram showing an example of a cross-sectional view of the photovoltaic module 20 in a side view. The first photovoltaic module 22 includes an insulating layer 22c, a power generation layer 22a, and a filter layer 22b. The insulating layer 22 c is an insulating sheet attached to the first outer surface portion 12 of the core portion 16. The power generation layer 22a is formed on the surface of the insulating layer 22c, and is configured by, for example, laminating a photoelectric conversion layer (for example, amorphous silicon) and a transparent electrode on the back electrode. The filter layer 22b is formed on the surface of the power generation layer 22a and selectively transmits incident light. The second photovoltaic module 24 includes an insulating layer 24c, a power generation layer 24a, and a filter layer 24b. The insulating layer 24c, the power generation layer 24a, and the filter layer 24b are configured similarly to the insulating layer 22c, the power generation layer 22a, and the filter layer 22b, respectively.

It is desirable that the photovoltaic module facing the outdoor side can be switched according to the sunshine conditions. Therefore, in the blind 100 of the embodiment, the light reflectance of the first photovoltaic module 22 is formed larger than the reflectance of the second photovoltaic module 24. Specifically, the filter layer 22b is formed to have a higher light reflectance than the filter layer 24b. That is, the filter layer 22b may be a filter that transmits infrared light and reflects more visible light. The power generation layer 22a is formed with higher power generation efficiency in the infrared region than the power generation layer 24a. By configuring in this way, the first photovoltaic module 22 can have a reflectance higher than that of the second photovoltaic module 24.

The light reflectance of the first photovoltaic module 22 may be formed to 70% or more, for example. In particular, the reflectance of the wavelength region where the spectral sensitivity of the cell such as the near-infrared ray and the visible ray of the first photovoltaic module 22 is low may be formed to 70% or more, for example. As compared with the case where the reflectance is low, absorption of near-infrared rays and visible rays can be suppressed, and the temperature increase of the first photovoltaic module 22 can be mitigated. The light reflectance of the second photovoltaic module 24 may be formed to be 30% or less, for example. Since it is close to black, power can be generated more efficiently from light than when the reflectance is high.

(Connection wiring)
Next, an example of wiring of the photovoltaic module 20 will be described. FIG. 8 is a schematic diagram showing a wiring path of the photovoltaic cell module 20. First, connection wiring of the first photovoltaic module 22 will be described. In each slat 10, the plurality of photovoltaic submodules 21 included in the first photovoltaic module 22 are connected in series from left to right along the longitudinal direction of the slat 10. From the right end electrode of the first photovoltaic module 22, the inside of the slat 10 is folded back from the right to the left, and is connected to the left folded wiring. From the left end electrode of the first photovoltaic module 22, a lead wire is wired upward and straddling the slat, and is connected to the folded wiring or electrode 22 m of the upper slat 10. In this way, the first photovoltaic module 22 is connected in series from top to bottom. The leftmost electrode of the uppermost slat 10 is connected to the electrode 22m by a lead wire. The folded wiring on the left side of the lowermost slat 10 is connected to the electrode 22p by a lead wire. That is, the first photovoltaic module 22 of each slat 10 is connected in series, and the generated power is output to the electrode 22p and the electrode 22m.

Similarly, the plurality of photovoltaic sub-modules 21 included in the second photovoltaic module 24 are connected in series from right to left along the longitudinal direction of the slat 10. The plurality of second photovoltaic module 24 are connected in series across the slats from top to bottom. The electric power generated by the plurality of second photovoltaic module 24 connected in series is output to the electrode 24p and the electrode 24m. That is, the electric power generated by the plurality of first photovoltaic module 22 is output to the electrode 22p and the electrode 22m by the lead wire wired across the left end side which is one end in the longitudinal direction of the slat 10, and the plurality of second photovoltaic modules 22 are output. The generated power of the photovoltaic module 24 is output to the electrode 24p and the electrode 24m by a lead wire wired across the right end side which is the other end in the longitudinal direction of the slat 10. The electrode 22p, the electrode 22m, the electrode 24p, and the electrode 24m are connected to predetermined output means (not shown) in the head box 52.

The lead wire wired across the slat 10 may be incorporated in the ladder cord 62 or the lifting / lowering cord 64, but in the blind 100 of the embodiment, the lead wire is provided separately from the ladder cord 62 and the lifting / lowering cord 64. .

(Selection circuit)
When one of the first photovoltaic module 22 and the second photovoltaic module 24 generates a large amount of power with the outside facing the room, the other faces the room with a small amount of power generation. For this reason, if the 1st photovoltaic module 22 and the 2nd photovoltaic module 24 are simply connected in series, the whole electric power generation output will fall by the internal resistance of the module which faced the room. Therefore, the blind 100 is provided with a selection circuit (not shown) that selects and outputs the output of the first photovoltaic module 22 and the second photovoltaic module 24 that has the larger power generation amount.

Next, the operation of the blind 100 thus configured will be described. The blind 100 according to the embodiment is configured such that the first photovoltaic module 22 and the second photovoltaic module 24 can be switched and operated so as to face the outdoor. For example, the angle of the slat 10 may be adjusted through the ladder cord 62. With this configuration, when the sunshine is strong, such as in summer, the first photovoltaic module 22 having a high reflectance can be switched to face the outdoors as shown in FIG. Further, when the sunshine is weak, such as in winter, the second photovoltaic module 24 having a low reflectance can be switched so as to face the outdoors as shown in FIG. Such switching of the modules may be configured to be manually switchable, or may be configured to be automatically switchable according to the output of the detection means by providing a detection means for detecting the state of the sun.

Next, the characteristics of the blind 100 configured as described above will be described.
The blind 100 includes a slat 10 that is a photovoltaic slat in which a first photovoltaic module 22 is provided on the first outer surface 12 and a second photovoltaic module 24 is provided on the second outer surface 14. The light reflectance of the first photovoltaic module 22 is formed larger than the reflectance of the second photovoltaic module 24. According to this configuration, when sunlight is strong, the first photovoltaic module 22 having a high reflectance is directed outside to reduce the temperature rise of the blind 100, and when sunlight is weak, the second photovoltaic module 24 having a low reflectance is directed outdoors. By reducing reflection, light energy can be absorbed efficiently.

In the blind 100, the light reflectance of the first photovoltaic module 22 is 70% or more, and the reflectance of light of the second photovoltaic module 24 is 30% or less. By directing the first photovoltaic module 22 to the outside when the light intensity is strong, absorption of light energy can be suppressed to half or less, and the temperature rise of the blind 100 can be further alleviated.

In the blind 100, when the direction along the short side 10 b of the slat 10, which is a photovoltaic cell slat, is referred to as the short side direction, one end 22 e of the range 22 g in the short side direction of the first photovoltaic module 22 is the short side of the second photovoltaic module 24. It is located within the range 24g in the side direction. According to this configuration, it is possible to form a non-laying region in which a photovoltaic cell is not provided in a predetermined range of the first outer surface portion 12. By making this non-laying area correspond to the shade area 10d of the upper slat 10h, the influence of the shade area 10d can be mitigated.

In the blind 100, a gap is provided between the first outer surface portion 12 and the second outer surface portion 14, and at least one of the first outer surface portion 12 and the second outer surface portion 14 has a vent hole communicating with the outside air. 30 is provided. By communicating with the outside air, the core portion 16 and the photovoltaic cell module 20 are cooled, and a reduction in power generation efficiency of the photovoltaic cell module 20 can be mitigated. Moreover, the warm air discharged | emitted from the ventilation hole 30 can also contribute to the improvement of indoor heating efficiency by flowing also indoors.

In the blind 100, since the first outer surface portion 12 and the second outer surface portion 14 are integrally formed from a metal material or a resin material, the first outer surface portion 12 and the second outer surface portion 14 are connected to each other by communicating with the outside air. The installed photovoltaic module 20 can be effectively cooled.

(Photovoltaic blind system)
Next, the use of the blind 100 will be described. FIG. 10 is a schematic diagram of the photovoltaic cell blind system 1 using the blind 100 according to the embodiment. In FIG. 10, the room 80 is formed between the ceiling 76 and the floor 78, and is partitioned from the outdoor 81 by the glass wall 74. The photovoltaic cell blind system 1 mainly includes a blind 100, a battery 70, and a power supply device 72. The blind 100 is suspended with the head box 52 facing up and the bottom rail 54 facing down. The blind 100 is provided on the indoor 80 side so that the plurality of slats 10 cover the glass wall 74. The front of the blind 100 faces the outdoor 81, and the rear of the blind 100 faces the indoor 80. The battery 70 is charged by at least one output current of the first photovoltaic module 22 and the second photovoltaic module 24. The output power of the photovoltaic module 20 is guided to the head box 52 via a predetermined wiring (not shown). The electric power led to the head box 52 is led to the battery 70 through the wiring 73 provided in the room, and the battery 70 is charged. The battery 70 is accommodated below the floor 78, for example. The power supply device 72 supplies power from the battery 70 to the electrical device 82 in the room 80 facing the blind 100 via the wiring 75. The power supply device 72 is accommodated below the floor 78, for example. By configuring in this way, the configuration is simple, the equipment can be miniaturized, and the system can be configured at a low cost compared to the case where the power generated by the photovoltaic module 20 is reversely flowed to the commercial power system.

The battery 70 is charged when the power generation amount of the photovoltaic module 20 is large, and is discharged when the power generation amount is small, so that even when the power generation amount of the photovoltaic module 20 fluctuates, the power supply can be made smooth. The electric device 82 may be, for example, a task light 82a or a personal computer 82b installed on an office desk. The battery 70 may be configured to be rechargeable from a commercial power system. In this case, the electric device 82 can be used even when the power generation amount of the photovoltaic module 20 is insufficient.

Next, the characteristics of the photovoltaic cell blind system 1 configured as described above will be described.
In the photovoltaic blind system 1, the blind 100, the battery 70 charged by at least one output current of the first photovoltaic module 22 and the second photovoltaic module 24, and the electric device 82 in the room 80 facing the blind 100 from the battery 70. And a power supply device 72 for supplying power. According to this structure, compared with the case where the electric power generated with the photovoltaic module 20 flows backward to the commercial power system, the structure is simple, the equipment can be downsized, and the system can be configured at low cost. In addition, by making such an electric device 82 compatible with a DC power source, it becomes possible to use the DC power generated by the photovoltaic module 20 without converting it to AC. In this case, a means for converting to AC is not required, and conversion loss to AC can be reduced.
The above is the configuration of the photovoltaic cell blind system 1. The blind 100 according to the embodiment can be suitably used for the photovoltaic cell blind system 1.

The description has been given above based on the embodiment of the present invention. It is to be understood by those skilled in the art that these embodiments are illustrative, and that various modifications and changes are possible within the scope of the claims of the present invention, and that such modifications and changes are also within the scope of the claims of the present invention. It is understood. Accordingly, the description and drawings herein are to be regarded as illustrative rather than restrictive.

Hereinafter, modified examples will be described. In the drawings and description of the modification, the same reference numerals are given to the same or equivalent components and members as those in the embodiment. The description overlapping with the embodiment will be omitted as appropriate, and the configuration different from the embodiment will be described mainly.

(First modification)
Next, a first modification will be described. FIG. 11 is a schematic side view of the blind 200 according to the first modification. FIG. 11 corresponds to FIG. In the embodiment, the example in which all the slats are inclined at the same angle has been described. However, the present invention is not limited to this. For example, a part of the upper slats of the blind may be inclined at a different angle from the lower slats. In the blind 200, a light shelf 220 that is inclined at an angle different from that of the slat 10 is provided on the upper side of the slat 10.

From the viewpoint of improving energy efficiency, it is desirable to introduce a part of sunshine into the room to supplement the room lighting. Therefore, in the blind 200 according to the modification, a light shelf 220 is provided on the top of the blind 200. The light shelf 220 includes a plurality of slats 210 and is configured to be able to be introduced into the room 80 by reflecting sunlight 230 on the surface of the slats 210. The sunlight 230 reflected by the slats 210 can be reflected by the surface of the ceiling 76 to illuminate the room 80, for example. It is desirable to effectively introduce sunlight 230 into the room 80 by changing the angle of the slats 210 in response to changes in the solar altitude. Therefore, the blind 200 is configured such that the angle of the slat 210 can be adjusted separately from the slat 10. By changing the angle of the slat 210 separately from the slat 10, the sunlight 230 can be effectively used. The angle of the slat 210 may be configured to be manually adjustable, or may be configured to be automatically adjustable according to the output of the detection means by providing detection means for detecting the state of the sun.

The blind 200 of the first modified example has the same characteristics as the blind 100 by having the same configuration as the blind 100. In addition, the blind 200 can increase the amount of power generation in the season when sunlight is weak, and can supplement the indoor lighting by introducing sunlight into the room. In addition, the maintainability is much higher than when a dedicated light shelf is attached, and it can be easily introduced at a low cost.

(Second modification)
Next, a second modification will be described. In the embodiment, the example in which the first photovoltaic module 22 is laid on the convex surface of the core portion 16 and the second photovoltaic module 24 is laid on the concave surface of the core portion 16 has been described, but the present invention is not limited thereto. The first photovoltaic module 22 may be laid on the concave surface of the core portion 16, and the second photovoltaic module 24 may be laid on the convex surface of the core portion 16.

FIG. 12 is a side sectional view of the slat 310 according to the second modification. FIG. 12 corresponds to FIG. As shown in FIG. 12, in this modification, the first outer surface portion 12 has a concave shape, and the second outer surface portion 14 has a convex shape. The first photovoltaic module 22 is laid on the first outer surface portion 12 having a concave shape, and the second photovoltaic module 24 is laid on the second outer surface portion 14 having a convex shape.

The slat 310 of the second modified example has the same configuration as the slat 10 and thus has the same characteristics as the slat 10. In addition, since the second outer surface portion 14 having a convex shape can be made wider than the first outer surface portion 12 having a concave shape, the area of the second photovoltaic module 24 laid on the second outer surface portion 14 can be increased. When the second photovoltaic module 24 having a low reflectance is used outdoors in the season when sunlight is weak, the amount of power generation can be increased according to the increase in area.

(Other variations)
In the embodiment, the example in which the non-laying area where the photovoltaic cell is not provided in the portion corresponding to the shaded area 10d has been described, but the present invention is not limited thereto. For example, a CIGS photovoltaic cell may be adopted as the photovoltaic cell module 20, and this photovoltaic cell may be laid in a wide range including a portion corresponding to the shaded region 10d. By adopting the CIGS-based photovoltaic cell, the influence of the increase in resistance of the photovoltaic module 20 caused by the shaded region 10d can be alleviated, and the installation area can be increased, so that the amount of power generation can be increased accordingly. The CIGS photovoltaic cell is a thin-film polycrystalline photovoltaic cell that uses a chalcopyrite-based compound made of, for example, Cu, In, Ga, Al, Se, S, etc., instead of silicon, as the material of the light absorption layer.

In the embodiment, the example in which the photovoltaic module 20 includes a plurality of photovoltaic submodules 21 arranged in the longitudinal direction has been described, but the present invention is not limited to this. The photovoltaic module 20 may include a ribbon-like photovoltaic cell that is integrally formed in the longitudinal direction (X-axis direction). Such ribbon-shaped photovoltaic cells may be laid in multiple rows (for example, 5 rows) in the Z-axis direction on one slat, or only one integral photovoltaic cell may be laid on one slat. Such a ribbon-shaped photovoltaic cell can be realized, for example, by employing a CIGS photovoltaic cell.

In the embodiment, the example in which the selection circuit that selects and outputs the output of the first photovoltaic module 22 and the second photovoltaic module 24 with the larger power generation amount is described, but the present invention is not limited thereto. For example, you may comprise so that the electric power which each of the 1st photovoltaic module 22 and the 2nd photovoltaic module 24 generated may be consumed by another system | strain. These power systems may be configured to be able to switch between the power generation side and the consumption side, respectively, as necessary. In this case, the generated power can be used efficiently.

In the drawings used for the description, some members are hatched in order to clarify the relationship between the members, but the hatching does not limit the materials and materials of these members.

1 ・ ・ Photovoltaic blind system, 10 ・ ・ Slat, 11 ・ ・ Through hole, 12 ・ ・ 1st outer surface, 14 ・ ・ 2nd outer surface, 15 ・ ・ Hollow, 16 ・ ・ Core, 20 ・ ・ Photovoltaic Module, 22 .... 1st photovoltaic module, 23 ..., photovoltaic cell, 24 ..., second photovoltaic module, 30 ... Ventilation hole, 70 ... Battery, 72 ... Power supply device, 80 ... Indoor, 81 ... Outdoors, 82 ... electric equipment, 100 ... blinds.

The present invention relates to a photovoltaic blind and a photovoltaic blind system including the same.

Claims (6)

A photovoltaic cell slat provided with a first photovoltaic module on the first outer surface and a second photovoltaic module on the second outer surface;
The photovoltaic blind, wherein the light reflectance of the first photovoltaic module is greater than the reflectance of the second photovoltaic module. The light reflectance of the first photovoltaic module is 70% or more,
The photovoltaic cell blind according to claim 1, wherein the second photovoltaic module has a light reflectance of 30% or less. When the direction along the short side of the photovoltaic cell slat is referred to as the short side direction,
3. The photovoltaic blind according to claim 1, wherein one end of a range in the short side direction of the first photovoltaic module is located in a short side direction range of the second photovoltaic module. An interval is provided between the first outer surface portion and the second outer surface portion,
4. The photovoltaic cell blind according to claim 1, wherein at least one of the first outer surface portion and the second outer surface portion is provided with a vent hole that communicates with outside air. 5. 5. The photovoltaic blind according to claim 4, wherein the first outer surface portion and the second outer surface portion are integrally formed of a metal material or a resin material. A photovoltaic blind according to any one of claims 1 to 5;
A battery that is charged by at least one output current of the first photovoltaic module and the second photovoltaic module;
A supply device for supplying electric power from the battery to an indoor electrical device facing the photovoltaic blind;
A photovoltaic cell blind system comprising:

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