JP2024051873A - Sunshade device - Google Patents

Abstract

[Problem] To effectively utilize the generated electricity in a solar shading device equipped with solar cells. [Solution] A roll screen device 10 to be placed at an opening of a building is equipped with a sheet-shaped screen portion 12, solar cells 20 provided on the screen portion 12, a bottom rail 18 provided at the lower end of the screen portion 12, and a power supply port 32 provided on the bottom rail 18 for outputting the electricity generated by the solar cells 20 to the outside. [Selected Figure] Figure 2

Description

The present invention relates to a solar shading device such as a roller screen device or a blind device, and in particular to a solar shading device equipped with solar cells.

Conventionally, a roll screen device with solar cells installed in the screen portion has been known as a solar radiation shading device capable of generating electricity (see, for example, Patent Document 1).

JP 2011-179193 A

However, in conventional roll screen devices equipped with a power generation function such as that disclosed in Patent Document 1, there is no disclosure of how the generated electricity is utilized.

This disclosure was made in consideration of these issues, and its purpose is to provide technology that can effectively utilize the electricity generated in a solar shading device equipped with solar cells.

In order to solve the above problems, one embodiment of the solar shading device 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 on 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.

1 is a schematic front view of a roller blind device according to a first embodiment. FIG. FIG. 2 is a diagram for explaining a configuration of the roller blind device. FIG. 2 is a schematic vertical cross-sectional view of the roller screen device. FIG. 11 is a schematic front view of a blind device according to a second embodiment.

The present invention will be described below with reference to the drawings based on preferred embodiments. The following configuration is 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 parts shown in each drawing are given the same reference numerals, and duplicated explanations are omitted as appropriate. The dimensions of the parts in each drawing are enlarged or reduced as appropriate to facilitate understanding. Some parts that are not important for explaining the embodiment 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 position in which the solar shading device is installed on the building.

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.

A glass panel 105 is arranged 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 arranged on the interior side of the opening 100 of the building.

The roller blind device 10 comprises a screen section 12 as a solar heat shield and a holding section 14 that holds the screen section 12 in a suspended state.

The holding section 14 includes a winding drum 16 for winding up the screen section 12, and an upper frame 15 provided above the winding drum 16. The upper frame 15 is a hollow block of material, and is arranged 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.

The screen section 12 is constructed as a flexible rectangular sheet. The upper end of the screen section 12 in the longitudinal direction is connected to the winding drum 16, and a bottom rail 18 is provided at the lower end.

The bottom rail 18 applies a force in a direction that pulls the screen section 12 downward, and also applies tension to the screen section 12, improving its flatness.

The screen section 12 comprises a fabric layer and a plurality of solar cells 20 arranged on the fabric layer. The fabric layer may be made of fibers such as polypropylene, polyethylene, polyester, or plastics (synthetic resins).

In the example shown in FIG. 1, multiple solar cell 20 that are square 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, multiple solar cell cells that are rectangular in plan view may be arranged in the vertical direction of the screen portion 12. Generally, a matrix arrangement is often used for crystalline silicon solar cell. The solar cell 20 is configured to convert light energy into electricity by utilizing the photovoltaic effect.

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 raising 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. It can also be expected to have the effect of suppressing wrinkles in the screen unit 12.

Figure 2 is a diagram for explaining the configuration of the roller blind device 10. For the purpose of explanation, Figure 2 shows the inside of the upper frame 15, winding drum 16, screen unit 12, and bottom rail 18 in a perspective view.

As described above, the screen section 12 includes a plurality of solar cells 20 arranged in a matrix. Each solar cell 20 is formed with a positive and negative extraction electrode. 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 can be arranged in either series or parallel, and is not limited thereto here.

A thin ribbon wire is used, and the thickness of the ribbon wire may be, for example, 50 μm to 300 μm. The material of the ribbon wire may be, for example, copper, and the surface may be plated. As the type of copper, oxygen-free copper, tough pitch copper, phosphorus-deoxidized copper, and other pure copper are preferable. As a material other than copper, aluminum or an aluminum alloy may also be used. In this case, the surface may be treated.

At the lower end of the screen portion 12, the positive electrode ribbon wire 21 and the negative electrode ribbon wire 22 are connected to the positive electrode lead wire 23 and the negative electrode lead wire 24, respectively. The positive electrode lead wire 23 and the negative electrode lead wire 24 are pulled 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 pulled into the inside of the bottom rail 18.

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 constructed by combining two divided members, for example by fitting them together.

In the roller blind device 10 according to this embodiment, a control board for controlling the power generated by the solar cell 20 is housed within the bottom rail 18.

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, which reduces the production process and reduces costs.

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 by 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.

Figure 3 is a schematic vertical cross-sectional view of the roller blind device 10. In Figure 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.

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 top 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 from above the bottom rail 18 into the socket 32a of the power supply port 32, 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.

Next, the configuration of the holding unit 14 will be described. As described above, 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. 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.

As shown in FIG. 2, the upper frame 15 contains a motor control board 36 for controlling the tubular motor 34, a communication control board 38 for controlling communications 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 wiring between the boards can be reduced, thereby reducing the production process and reducing costs.

The configuration of the roller blind device 10 according to the first embodiment has been described above. With this roller blind device 10, the wiring length is shortened by providing a power supply port 32 on the bottom rail 18, and the power generated by the solar cell 20 can be output to the outside with low loss, making it possible to effectively use the generated power.

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

In addition, 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 section 12. If the power supply port plug is provided on the left or right end of the bottom rail 18 or on the underside of the bottom rail, the uprights or 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 section 12, so other objects do not get in the way. In addition, since the plug 32a of the power supply port 32 is difficult to see when viewed from the front, there is also the advantage that the same appearance as a normal roller blind can be provided.

In another embodiment, the plug 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.

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 electricity generated by the solar cell 20 to the outside are all integrated. When installing the roller blind device 10 in the opening 100 of a building, first, the bracket 106 is attached to the upper transom 103. Then, the upper frame 15 is fixed to the transom 103 via the bracket 106, and the entire roller blind device 10 is installed in the opening 100. Finally, the power cord is inserted into the building's outlet 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.

Second Embodiment
In the second embodiment, a blind device is shown as the solar radiation 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 slats 62 (eight in this embodiment) that are long in the horizontal direction as a solar radiation shield. The plurality of slats 62 are arranged in a blind-like manner in the vertical direction. Each slat 62 is formed, for example, in a horizontally elongated, approximately rectangular shape. A solar cell 63 is provided on each slat 62.

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

The head box 64 is installed on the upper tier of the multiple slats 62 and constitutes the top tier of the blind device 60. The head box 64 is fixed to the upper blind (not shown) of 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.

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

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 of each slat 62 in the width direction. The upper end of the ladder cord 68 is connected to an angle adjustment mechanism (not shown) inside the head box 64.

The lifting 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 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 cord 67 is connected to a lifting mechanism in the head box 64.

A lead wire (not shown) for extracting power is connected to the solar cell 63 of each slat 62, and the lead wire is pulled 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 constructed by combining two divided members, for example by fitting them together.

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, which can reduce the production process and reduce costs.

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 of the blind device 60 (toward the room side). By inserting the connector of a charging cable into the socket 70a of the power supply port 70, a mobile device such as a smartphone can be charged. The socket 70a may be provided with a lid or shutter to prevent dust from entering.

The configuration of the blind device 60 according to the second embodiment has been described above. With this blind device 60, the wiring length is shortened by providing a power supply port 70 on the bottom rail 66, and the power generated by the solar cell 63 can be output to the outside with low loss, so the generated power can be used effectively.

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

The present invention has been described above based on an embodiment. This embodiment is merely an example, and it will be understood by those skilled in the art 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. Therefore, the descriptions and drawings in this specification should be treated as illustrative rather than restrictive.

For example, in another embodiment, the bottom rail may house a storage battery and its control board, allowing the storage of electricity generated by the solar cell. In this case, the electricity stored in the storage battery can be extracted from the power supply port and used.

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 (7)

A solar shading device to be placed in an opening of a building,
A solar radiation shield;
A solar cell provided on the solar radiation shield;
A bottom rail provided at a lower end of the solar radiation shield;
a power supply port provided on the bottom rail for outputting the power generated by the solar cell to an outside;
A solar shading device comprising: The solar shading device according to claim 1, wherein the power supply port socket opens toward the top of the solar shading body. The solar shading 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. The solar shading device according to claim 3, wherein the control board includes an MPPT control board. The solar shading device is a roller screen device,
The solar shading device according to claim 1 , wherein the solar shading body includes a screen portion formed in a sheet shape. A winding drum for winding up the screen portion;
A motor for rotating the winding drum;
An upper frame provided above the winding drum;
Further equipped with
The solar shading device according to claim 5 , wherein a motor control board for controlling the motor is provided on the upper frame. The solar shading device is a blind device,
5. The solar shading device of claim 1, wherein the solar shading body comprises a plurality of laterally extending slats arranged vertically.

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