Solar shading device

Abstract

To provide a solar shading device with solar cells capable of effectively using generated electricity.SOLUTION: A roll screen device 10 placed in an opening of a building includes: a screen 12 formed in a sheet; solar cells 20 placed on the screen 12; a bottom rail 18 provided to the bottom of the screen 12; and a power supply port 32 provided to the bottom rail 18 for outputting electricity generated by the solar cells 20 to the outside.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a solar shading device such as a roller screen device or a blind device, and more particularly to a solar shading device equipped with solar cells. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a roll screen device having solar cells provided on a screen portion is known as a solar radiation shading device capable of generating electricity (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-179193 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional roller blind device having a power generating function as disclosed in Patent Document 1, there is no disclosure as to how the generated electricity is utilized.

[0005] The present disclosure has been made in view of the above problems, and has an object to provide a technique that can effectively utilize the generated electricity in a solar radiation shading device equipped with solar cells. [Means for solving the problem]

[0006] In order to solve the above problems, a solar shading device of one embodiment of the present invention is a solar shading device that is placed at an opening of a building, and includes a solar shading body, a solar cell provided in the solar shading body, a bottom rail provided at the lower end of the solar shading body, and a power supply port provided on the bottom rail for outputting electricity generated by the solar cell to the outside. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic front view of a roller blind device according to a first embodiment. [Diagram 2] FIG. 2 is a diagram for explaining a configuration of the roller blind device. [Diagram 3] FIG. 2 is a schematic vertical cross-sectional view of the roller screen device. [Figure 4] FIG. 11 is a schematic front view of a blind device according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The present invention will be described below with reference to the drawings based on preferred embodiments. The following configurations are for illustrative purposes to help understand the present disclosure, and the scope of the present disclosure is determined only by the appended claims. The same or equivalent components and members shown in each drawing are given the same reference numerals, and duplicated descriptions are omitted as appropriate. The dimensions of the members in each drawing are enlarged or reduced as appropriate to facilitate understanding. Some of the members that are not important for explaining the embodiments are omitted in each drawing. In addition, when terms indicating directions such as "up," "down," "front," "back," "left," "right," "inside," and "outside" are used in this disclosure, they refer to the directions in the posture when the solar shading device is attached to the building.

[0009] (First embodiment) In the first embodiment, a roller blind device is shown as the solar radiation shading device. Fig. 1 is a schematic front view of a roller blind device 10 according to the first embodiment. This roller blind device 10 is attached to an opening 100 of a building for use. In the example shown in Fig. 1, the opening 100 of the building is formed by frame materials such as vertically extending mullions (vertical frames) 101, 102 and horizontally extending mullions (horizontal frames) 103, 104.

[0010] A glass panel 105 is disposed on the exterior side of the opening 100 of the building. The glass panel 105 may be attached to the mullions 101, 102 and the transoms 103, 104 by a predetermined support means such as a structural sealant. The roller blind device 10 is disposed on the interior side of the opening 100 of the building.

[0011] The roller blind device 10 includes a screen portion 12 as a solar heat shield, and a holder 14 for holding the screen portion 12 in a suspended state.

[0012] The holding unit 14 includes a winding drum 16 for winding up the screen unit 12, and an upper frame 15 provided above the winding drum 16. The upper frame 15 is a hollow rectangular material, and is disposed so that its longitudinal direction is parallel to that of the winding drum 16. The upper frame 15 may be a member having a U-shaped cross section perpendicular to the longitudinal direction. Support members 17 are provided on both the left and right ends of the upper frame 15. The winding drum 16 is supported by the upper frame 15 via the support members 17.

[0013] The screen unit 12 is formed in a flexible rectangular sheet-like body. The screen unit 12 has an upper end in the longitudinal direction connected to a winding drum 16 and a bottom rail 18 provided at its lower end.

[0014] The bottom rail 18 applies a force in a direction that pulls the screen unit 12 downward, and also acts to impart tension to the screen unit 12, thereby improving its flatness.

[0015] The screen unit 12 includes a fabric layer and a plurality of solar cells 20 provided on the fabric layer. The fabric layer may be made of fibers such as polypropylene, polyethylene, polyester, or plastics (synthetic resins).

[0016] In the example shown in Fig. 1, a plurality of solar cell 20 having a square shape in plan view are arranged in a matrix, but the size, shape, and arrangement method of the solar cell 20 are not particularly limited, and any size, shape, and arrangement are possible. For example, a plurality of solar cell cells having a rectangular shape in plan view may be arranged in a line in the vertical direction of the screen unit 12. Generally, a matrix arrangement is often used for crystalline silicon solar cell. The solar cell 20 is configured to convert light energy into electric power by utilizing the photovoltaic effect.

[0017] The roller blind device 10 may be provided with a pair of guide rails at both the left and right ends of the screen unit 12 to guide the rising and lowering of the screen unit 12. The guide rails may be configured to sandwich the ends of the screen unit 12. The gap between the guide rails and the screen unit 12 may be blocked with mohair or the like. Providing the guide rails can prevent light and heat leakage from the sides of the screen unit 12, thereby improving the light blocking performance, heat blocking performance, and heat insulation performance. In addition, the effect of suppressing wrinkles in the screen unit 12 can be expected.

[0018] Fig. 2 is a diagram for explaining the configuration of the roller blind device 10. For the sake of explanation, Fig. 2 shows the insides of the upper frame 15, the winding drum 16, the screen unit 12, and the bottom rail 18 in a see-through manner.

[0019] As described above, the screen unit 12 includes a plurality of solar cells 20 arranged in a matrix. Each solar cell 20 is formed with positive and negative extraction electrodes. The positive extraction electrodes formed on each solar cell 20 are connected to each other by a positive electrode ribbon wire 21. Similarly, the negative extraction electrodes formed on each solar cell 20 are connected to each other by a negative electrode ribbon wire 22. The plurality of solar cells 20 are thus connected to each other by the positive electrode ribbon wire 21 and the negative electrode ribbon wire 22. The wiring form can be arranged in either series or parallel, and is not limited thereto here.

[0020] The ribbon wire used is thin, and may be, for example, 50 μm to 300 μm thick. The material of the ribbon wire may be, for example, copper, and the surface may be plated. The type of copper is preferably pure copper such as oxygen-free copper, tough pitch copper, phosphorus-deoxidized copper, etc. As a material other than copper, aluminum or an aluminum alloy may also be used. In this case, the surface may be treated.

[0021] At the lower end of the screen portion 12, a positive electrode lead wire 23 and a negative electrode lead wire 24 are connected to the positive electrode ribbon wire 21 and the negative electrode ribbon wire 22, respectively. The positive electrode lead wire 23 and the negative electrode lead wire 24 are drawn out from the lower end of the screen portion 12 to the outside. The positive electrode lead wire 23 and the negative electrode lead wire 24 are drawn into the inside of the bottom rail 18.

[0022] In the roller blind device 10 according to this embodiment, the bottom rail 18 is a hollow rod-shaped body. The outer cross section perpendicular to the longitudinal direction of the bottom rail 18 may be rectangular or circular. The hollow rod-shaped body may be formed by combining two divided members, for example, by fitting them together.

[0023] In the roller blind device 10 according to this embodiment, a control board for controlling the power generated by the solar battery cells 20 is housed in the bottom rail 18.

[0024] The control boards include an MPPT (Maximum Power Point Tracking) control board 26, a charge / discharge control board 28, and a power supply board 30. These control boards control the power input via the positive electrode lead wire 23 and the negative electrode lead wire 24. These boards may be configured as separate boards or as a single board. When configured as a single board, the wiring between the boards can be reduced, thereby reducing the production process and reducing costs.

[0025] The MPPT control board 26 is a control board for tracking the maximum power point during power generation in real time in response to changes in weather conditions. The charge / discharge control board 28 is a control board for controlling the charging and discharging of the power generated in the solar cell 20. The power supply board 30 is a board for controlling the supply of power to the outside via the power supply port 32.

[0026] Fig. 3 is a schematic vertical cross-sectional view of the roller blind device 10. In Fig. 3, the left side of the screen unit 12 is the outdoor side, and the right side of the screen unit 12 is the indoor side.

[0027] In the roller blind device 10 according to this embodiment, a power supply port 32 for outputting power to the outside is provided on the bottom rail 18. The power supply port 32 may be, for example, a USB port or a DC jack. In this embodiment, as shown in FIG. 3, the socket 32a of the power supply port 32 opens toward the upper side of the screen unit 12 on the indoor side of the screen unit 12. In other words, the socket 32a of the power supply port 32 is provided on the upper surface of the bottom rail 18 on the indoor side of the screen unit 12. By inserting the connector 50 of the charging cable into the socket 32a of the power supply port 32 from above the bottom rail 18, a mobile terminal such as a smartphone can be charged. The socket 32a may be provided with a lid or a shutter to prevent dust from entering.

[0028] Next, the configuration of the holding unit 14 will be described. As described above, the holding unit 14 includes the winding drum 16 for winding up the screen unit 12, and the upper frame 15 provided above the winding drum 16. As shown in Fig. 2, a tubular motor 34 for rotating the winding drum 16 is disposed within the winding drum 16. The screen unit 12 can be raised and lowered by driving the tubular motor 34.

[0029] As shown in Fig. 2, the upper frame 15 accommodates a motor control board 36 for controlling the tubular motor 34, a communication control board 38 for controlling communication with a mobile terminal such as a smartphone, and an AC / DC conversion board 40 for converting AC voltage input from an outlet via a power line 41 into DC voltage. These boards may be configured as separate boards or as a single board. When configured as a single board, the number of wiring between the boards can be reduced, thereby reducing the production process and reducing costs.

[0030] The configuration of the roller blind device 10 according to the first embodiment has been described above. According to this roller blind device 10, the power supply port 32 is provided on the bottom rail 18, thereby shortening the wiring length and enabling the power generated by the solar cell 20 to be output to the outside with low loss, so that the generated power can be used effectively.

[0031] The bottom rail 18 moves up and down in accordance with the elevation and lowering of the screen unit 12, but during power generation, the screen unit 12 is in the lowered state and the bottom rail 18 is assumed to be located below the opening 100. Therefore, it is easy to connect the connector 50 to the power supply port 32.

[0032] Moreover, in the roller blind device 10 according to the first embodiment, the plug 32a of the power supply port 32 opens toward the top of the screen unit 12. If the plug of the power supply port is provided on the left and right ends of the bottom rail 18 or on the underside of the bottom rail, the uprights and blinds of the building may get in the way, making it difficult to connect the connector 50. In the first embodiment, the connector 50 can be inserted from above the screen unit 12, so other objects do not get in the way. Also, since the plug 32a of the power supply port 32 is difficult to see when viewed from the front, there is an advantage in that the same appearance as a normal roller blind can be provided.

[0033] In another embodiment, the socket 32a of the power supply port 32 provided on the bottom rail 18 may open toward the front of the screen portion 12, or toward the bottom of the screen portion 12.

[0034] In the roller blind device 10 according to the first embodiment, the configuration for raising and lowering the screen section 12 and the configuration for outputting the power generated by the solar cell 20 to the outside are all integrated. When installing the roller blind device 10 in an opening 100 of a building, first, the brackets 106 are attached to the upper transom 103. Then, the upper frame 15 is fixed to the transom 103 via the brackets 106, and the entire roller blind device 10 is installed in the opening 100. Finally, the power cord is inserted into an outlet in the building to complete the installation. No special construction or extensive wiring work is required for the building, and installation is extremely easy, as it is only necessary to install the roller blind device 10 assembled in a factory in the opening of the building.

[0035] Second embodiment In the second embodiment, a blind device is shown as the solar shading device. Fig. 4 is a schematic front view of a blind device 60 according to the second embodiment. The blind device 60 includes a plurality of (here, eight) slats 62 that are long in the horizontal direction as a solar heat shield. The plurality of slats 62 are arranged in a vertical blind pattern. Each slat 62 is formed, for example, in a horizontally elongated, approximately rectangular shape. A solar cell 63 is provided on each slat 62.

[0036] The blind device 60 further includes a head box 64 , a bottom rail 66 , a ladder cord 68 , and a lifting cord 67 .

[0037] The head box 64 is provided above the multiple slats 62 and constitutes the uppermost stage of the blind device 60. The head box 64 is fixed to a blind (not shown) above the opening via a bracket (not shown). The head box 64 houses an angle adjustment mechanism (not shown) and a lifting mechanism (not shown) for the slats 62.

[0038] The bottom rail 66 is provided below the multiple slats 62 and constitutes the lowest stage of the blind device 60.

[0039] The ladder cord 68 is a cord member for adjusting the angle of the slats 62. The ladder cord 68 is connected to both sides in the width direction of each slat 62. The upper end of the ladder cord 68 is connected to an angle adjustment mechanism (not shown) in the head box 64.

[0040] The lifting / lowering cord 67 is a cord member for folding and lifting the multiple slats 62 by lifting the bottom rail 66, and opening and lowering the multiple slats 62 by lowering the bottom rail 66. The lower end of the lifting / lowering cord 67 is connected to the bottom rail 66 through a through hole 69 drilled in the slats 62. The upper end of the lifting / lowering cord 67 is connected to a lifting mechanism in the head box 64.

[0041] A lead wire (not shown) for extracting power is connected to the solar cell 63 of each slat 62, and the lead wire is drawn into the inside of the bottom rail 66. The bottom rail 66 is a hollow rod-shaped body. The outer cross section perpendicular to the longitudinal direction of the bottom rail 66 may be a flat rectangle. The hollow rod-shaped body may be formed by combining two divided members, for example, by fitting them together.

[0042] In the blind device 60 according to this embodiment, a control board for controlling the power generated by the solar cell 63 is also housed in the bottom rail 66. The control board includes an MPPT control board, a charge / discharge control board, and a power supply board (none of which are shown). These boards may be configured as separate boards or as a single board. When configured as a single board, the wiring between the boards can be reduced, thereby reducing the production process and reducing costs.

[0043] In the blind device 60 according to this embodiment, a power supply port 70 for outputting power to the outside is also provided on the bottom rail 66. The power supply port 70 may be, for example, a USB port or a DC jack. In this embodiment, as shown in FIG. 4, the socket 70a of the power supply port 70 opens toward the front direction (the room side) of the blind device 60. A mobile terminal such as a smartphone can be charged by inserting the connector of a charging cable into the socket 70a of the power supply port 70. A lid or a shutter may be provided on the socket 70a to prevent dust from entering.

[0044] The configuration of the blind device 60 according to the second embodiment has been described above. According to this blind device 60, the power supply port 70 is provided on the bottom rail 66, thereby shortening the wiring length and enabling the power generated by the solar cell 63 to be output to the outside with low loss, thereby enabling the generated power to be used effectively.

[0045] In another embodiment, the socket 70 a of the power supply port 70 provided on the bottom rail 66 may open toward the top or bottom of the blind device 60 .

[0046] The present invention has been described above based on the embodiment. This embodiment is an example, and various modifications and changes are possible within the scope of the claims of the present invention, and it is understood by those skilled in the art that such modifications and changes are also within the scope of the claims of the present invention. Therefore, the description and drawings in this specification should be treated as illustrative rather than restrictive.

[0047] For example, in another embodiment, a storage battery and its control board may be housed in the bottom rail so that the power generated by the solar cell can be stored. In this case, the power stored in the storage battery can be taken out from the power supply port for use. [Explanation of symbols]

[0048] 10 roller screen device, 12 screen section, 14 holding section, 15 upper frame, 16 winding drum, 18, 66 bottom rail, 20, 63 solar cell, 26 MPPT control board, 28 charge / discharge control board, 30 power supply board, 32 power supply port, 34 tubular motor, 36 motor control board, 38 communication control board, 40 AC / DC conversion board, 41 power line, 50 connector, 60 blind device, 62 slat.

Claims

1. A solar radiation shielding device disposed at an opening of a building, comprising: a solar radiation shielding body; a solar cell provided on the solar radiation shielding body; a bottom rail provided at a lower end of the solar radiation shielding body; a power supply port provided on the bottom rail for outputting the power generated by the solar cell to the outside; and the solar radiation shielding device comprising the above.

2. The solar radiation shielding device according to Claim 1, wherein an insertion port of the power supply port opens upward toward the solar radiation shielding body.

3. The solar radiation shielding device according to Claim 1 or 2, wherein a control board for controlling the power output from the power supply port is provided on the bottom rail.

4. The solar radiation shielding device according to Claim 3, wherein the control board includes an MPPT control board.

5. The solar radiation shielding device is a roll screen device, and the solar radiation shielding body includes a screen portion configured in a sheet shape. The solar radiation shielding device according to Claim 1 or 2.

6. a winding drum for winding the screen portion; a motor for rotating the winding drum; an upper frame provided above the winding drum; further comprising: The solar radiation shielding device according to Claim 5, wherein a motor control board for controlling the motor is provided on the upper frame.

7. The solar radiation shielding device is a blind device, and the solar radiation shielding body includes a plurality of slats extending in the horizontal direction and arranged in the vertical direction. The solar radiation shielding device according to Claim 1 or 2.

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