Solar shading devices and roller screen devices

Abstract

To provide a solar shading device with solar cells capable of effectively using generated electricity.SOLUTION: The roll screen device placed in an opening of a building includes: a screen 12 formed in a sheet; solar cells 20 placed on the screen 12; an upper frame 15 provided above the screen section 12; and a charge / discharge control board 28 accommodated in an upper frame 15 for controlling the charging and discharging of electricity generated by the solar cells 20.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a solar radiation shielding device such as a roll screen device, and particularly to a solar radiation shielding device provided with solar cell panels.

Background Art

[0002] Conventionally, as a solar radiation shielding device capable of power generation, a roll screen device provided with solar cell panels on a screen portion is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the roll screen device having a conventional power generation function as disclosed in Patent Document 1, how to utilize the generated power is not disclosed.

[0005] The present disclosure has been made in view of such problems, and an object thereof is to provide a technology capable of effectively utilizing the generated power in a solar radiation shielding device provided with solar cell panels.

Means for Solving the Problems

[0006] In order to solve the above problems, a solar radiation shielding device according to an aspect of the present invention is a solar radiation shielding device disposed at an opening of a building, including a solar radiation shielding body, solar cell panels provided on the solar radiation shielding body, an upper frame provided above the solar radiation shielding body, and a charge / discharge control board accommodated in the upper frame for controlling charging and discharging of the power generated by the solar cell panels.

Brief Description of the Drawings

[0007] [Figure 1] This is a schematic front view of a roller screen device according to an embodiment. [Figure 2] This is a diagram illustrating the configuration of a roller screen device. [Figure 3] This is a schematic longitudinal cross-sectional view of a roller screen device. [Figure 4] This is a schematic front view of the main parts of a roller screen device according to another embodiment. [Modes for carrying out the invention]

[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 disclosure, and the scope of the disclosure is defined solely by the appended claims. Identical or equivalent components and members shown in each drawing are denoted by the same reference numerals, and redundant descriptions are omitted as appropriate. In addition, the dimensions of members in each drawing are shown enlarged or reduced as appropriate for ease of understanding. Furthermore, some members that are not important to explaining the embodiments are omitted in each drawing. In addition, when terms indicating direction such as "up," "down," "front," "back," "left," "right," "inside," and "outside" are used in this disclosure, they refer to the direction in which the solar shading device is positioned when installed on a building.

[0009] Here, a roll screen device is shown as one embodiment of a sunshade device. Figure 1 is a schematic front view of the roll screen device 10 according to this embodiment. This roll screen device 10 is used by being attached to an opening 100 in a building. In the example shown in Figure 1, the opening 100 in the building is formed by frame materials such as vertical mullions (vertical frames) 101, 102 extending in the vertical direction and horizontal transoms (horizontal frames) 103, 104 extending in the horizontal direction.

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

[0011] The roller screen device 10 comprises a screen section 12 that acts as a solar heat shield, a holding section 14 that suspends and holds the screen section 12, and additional frames 45 and 46 arranged to the sides of the screen section 12.

[0012] The holding unit 14 comprises 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 provided above the screen unit 12. The upper frame 15 is a hollow rectangular timber, and is positioned so that its longitudinal direction is parallel to the longitudinal direction of the winding drum 16. The upper frame 15 may also be a member with a U-shaped cross-section perpendicular to its longitudinal direction. Support members 17 are provided at 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 section 12 is made up of a flexible rectangular sheet-like body. 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.

[0014] The bottom rail 18 applies a force that pulls the screen section 12 downwards, and also exerts tension on the screen section 12 to improve its flatness.

[0015] The screen section 12 comprises 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, or polyester, or plastics (synthetic resins).

[0016] In the example shown in Figure 1, multiple square-shaped solar cells 20 are arranged in a matrix. However, the size, shape, and arrangement method of the solar cells 20 are not particularly limited, and any size, shape, and arrangement is possible. For example, multiple rectangular-shaped solar cells may be arranged in the vertical direction of the screen section 12. In general, matrix arrangements are frequently used in crystalline silicon solar cells. The solar cells 20 are configured to convert light energy into electricity by utilizing the photovoltaic effect.

[0017] The additional frames 45 and 46 are hollow rectangular timbers and are positioned to the side of the screen section 12 so that their longitudinal direction is parallel to the longitudinal direction of the mullions 101 and 102. The additional frames 45 and 46 may also be members with a U-shaped cross-section perpendicular to the longitudinal direction. The left additional frame 45 is attached to the mullion 101, and the right additional frame 46 is attached to the mullion 102. In Figure 1, the additional frames are attached to the inner surface of the mullion, but the additional frames may also be attached to the back surface (indoor side) of the mullion. In this case, the additional frames will have an appearance as if they were integrated with the mullion. The method of fixing the additional frames to the mullion is not particularly limited and may include screw fastening, adhesive bonding, fitting, welding, etc.

[0018] The roller screen device 10 may be equipped with a pair of guide rails at both the left and right ends of the screen section 12 to guide the raising and lowering of the screen section 12. The guide rails may be fixed to the sides of the additional frames 45, 46, or provided on the back or sides of the mullions 101, 102. The guide rails may be configured to clamp the ends of the screen section 12. The gap between the guide rails and the screen section 12 may be sealed with mohair or the like. By providing guide rails, light leakage and heat leakage from the sides of the screen section 12 can be prevented, thereby improving light-blocking performance, heat-shielding performance, and thermal insulation performance. It can also be expected to have the effect of suppressing wrinkles in the screen section 12.

[0019] FIG. 2 is a schematic front view for explaining the configuration of the roll screen device 10. In FIG. 2, for the sake of explanation, the inside of the upper frame 15, the take-up drum 16, the screen part 12, and the additional frame 45 are shown in a perspective view. FIG. 3 is a schematic longitudinal sectional view for explaining the configuration of the roll screen device 10. In FIG. 3, the left side of the screen part 12 is the outdoor side, and the right side of the screen part 12 is the indoor side.

[0020] As described above, the screen part 12 includes a plurality of solar cell units 20 arranged in a matrix. Each solar cell unit 20 has positive and negative extraction electrodes formed thereon. The positive extraction electrodes formed on each solar cell unit 20 are connected to each other by a positive electrode ribbon wire 21. Similarly, the negative extraction electrodes formed on each solar cell unit 20 are connected to each other by a negative electrode ribbon wire 22. The plurality of solar cell units 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 regardless of series or parallel, and here, it is not limited thereto.

[0021] A thin ribbon wire is used, for example, the thickness of the ribbon wire may be 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, pure copper such as oxygen-free copper, tough pitch copper, and phosphor deoxidized copper is preferable. As a material other than copper, aluminum or an aluminum alloy can also be used. In this case, the surface may also be treated.

[0022] At the upper end of the screen part 12, a positive electrode lead wire 23 and a negative electrode lead wire 24 are respectively connected to the positive electrode ribbon wire 21 and the negative electrode ribbon wire 22. The positive electrode lead wire 23 and the negative electrode lead wire 24 are drawn out from the upper end of the screen part 12 to the outside. The positive electrode lead wire 23 and the negative electrode lead wire 24 are drawn into the inside of the take-up drum 16. The positive electrode lead wire 23 and the negative electrode lead wire 24 pass through the inside of the rotating shaft 16a of the take-up drum 16 and are drawn out to the outside of the take-up drum 16 and drawn into the upper frame 15.

[0023] In the roll screen device 10 according to this embodiment, a control board for controlling the power generated by the solar cell 20 and a storage battery 29 are housed in the upper frame 15. The control board includes an MPPT (Maximum Power Point Tracking) control board 26 and a charge / discharge control board 28. The MPPT control board 26 is a control board for tracking the maximum operating point in real time during power generation according 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 charging and discharging of the storage battery 29 are controlled by the charge / discharge control board 28.

[0024] In the roll screen device 10 according to this embodiment, a power supply port 32 for outputting power to the outside and a power supply board 30 for controlling the supply of power to the outside via the power supply port 32 are provided on the left additional frame 45. The power supply port 32 may be, for example, a USB port or a DC jack. The power supply board 30 is connected to the charge / discharge control board 28 via a positive lead wire 23 and a negative lead wire 24. By inserting the connector 50 of the charging cable into the insertion port 32a of the power supply port 32, a mobile terminal such as a smartphone can be charged. In this embodiment, the power supply board 30 and the power supply port 32 are provided on the additional frame 45, but they may be provided on the upper frame 15. Also, the power supply board 30 and the power supply port 32 may be provided on the bottom rail 18.

[0025] Instead of or in addition to the power supply port, a power supply unit using another power transmission method may be provided. For example, as a power supply unit for outputting power to the outside, a wireless power supply unit capable of non-contact power transmission may be provided. The wireless power supply unit may be composed of, for example, a power transmission coil and a power transmission control board. By placing a mobile terminal near the wireless power supply unit, the mobile terminal can be charged. The wireless power supply method can use an electromagnetic induction method or a magnetic field resonance method.

[0026] As shown in Figure 2, a tubular motor 34 for rotating the winding drum 16 is located inside the winding drum 16. The screen section 12 can be raised and lowered by driving the tubular motor 34.

[0027] In the roll screen device 10 according to this embodiment, a motor control board 36 for controlling a 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 to DC voltage are housed within the upper frame 15. In Figure 2, the power line 41 is routed outside from the upper frame 15, but the power line 41 may also be routed from the lower end of an additional frame. The motor control board 36 drives the tubular motor 34 using power from an outlet. Alternatively, the tubular motor 34 may be driven using power stored in a battery 29. In this case, energy saving is possible.

[0028] The configuration of the roll screen device 10 according to this embodiment has been described above. When charging a battery located far away with power generated by the solar cell 20, the wiring length becomes long, which requires securing space for the wiring and can lead to complicated installation, as well as potentially significant power loss. On the other hand, in the roll screen device 10 according to this embodiment, the power generated by the solar cell 20 can be used to charge the battery 29 housed in the nearby upper frame 15 with low loss, or to output to the outside with low loss from the power supply port 32 provided in the additional frame 45, thus enabling effective use of the generated power.

[0029] In the roller screen device 10 according to this embodiment, various control boards and a storage battery 29 are housed in the upper frame 15. When installing the roller screen device 10 in a building opening 100, first, a bracket 106 is attached to the upper transom 103. Then, the upper frame 15 is fixed to the transom 103 via the bracket 106. This attaches the winding drum 16, screen section 12, and bottom rail 18 to the opening 100. Next, additional frames 45 and 46 are installed. Finally, the installation is completed by plugging the power cord 41 into the building's outlet. No special construction work on the building or a lot of wiring work is required; the roller screen device 10, assembled at the factory, is simply attached to the building opening 100, making installation very easy.

[0030] As shown in Figure 3, the roller screen device 10 according to this embodiment can be attached to a building's blind box 110. In this case, the upper frame 15, which houses the control board and the battery 29, can be placed inside the blind box 110, thus preventing direct sunlight from hitting the control board and the battery 29. Furthermore, the blind box acts as a heat sink, suppressing the temperature rise of the control board and the battery 29. This eliminates the need to provide a fan for heat dissipation inside the upper frame 15, resulting in lower power consumption, lower costs, and quieter operation. To further improve heat dissipation, an opening may be provided in a part of the blind box 110, for example, to dissipate heat into the ceiling space.

[0031] Figure 4 is a schematic front view of the main parts of a roll screen device 60 according to another embodiment. In the case of a structure in which lead wires are drawn out from the upper end of the screen section 12, the lead wires rotate as the screen section 12 is wound up, which presents the problem of the lead wires being prone to entanglement and damage. To solve this problem, a method using slip rings can be considered, but here we propose a method using wireless power transmission (contactless power transmission).

[0032] As shown in Figure 4, a power transmission coil section 62 is provided at the end of the winding drum 16, which is a rotating body, and a power receiving coil section 64 is provided on the support member 17. The power transmission coil section 62 mainly consists of a power transmission coil and a power transmission control board, and the power receiving coil section 64 mainly consists of a power receiving coil and a power receiving control board. The power transmission coil section 62 and the power receiving coil section 64 are arranged to face each other. A positive electrode lead wire 23 and a negative electrode lead wire 24 are connected to the power transmission coil section 62. When current flows through the power transmission coil section 62, electromagnetic induction occurs, and current flows through the opposing power receiving coil section 64. This makes it possible to suitably extract the electrodes generated in the solar cell 20 while avoiding situations such as the lead wires becoming entangled as the screen section 12 is wound up. The wireless transmission shown here uses an electromagnetic induction method, but a magnetic field resonance method can also be used.

[0033] Furthermore, in the roll screen device 60 according to this embodiment, the extracted power is transmitted through wiring formed on multiple substrates 66. The multiple substrates 66 include an MPPT control substrate 26 and a charge / discharge control substrate 28 housed within the upper frame 15. As shown in Figure 4, the ends of the substrates 66 are brought into contact with each other, and power is transmitted between the substrates 66. By transmitting power through wiring formed on the substrates 66 in this way, the wiring structure and wiring work using lead wires, which are prone to tangling and difficult to handle, become unnecessary, thus enabling cost reduction. Moreover, if these substrates are configured as a single substrate, the wiring between substrates can be reduced, thus reducing the production process and lowering costs.

[0034] The present invention has been described above based on embodiments. These embodiments are illustrative, 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. Accordingly, the descriptions and drawings herein should be treated as illustrative rather than limiting.

[0035] For example, although the above description described a roller screen device as one embodiment of a solar shading device, the solar shading device is not limited to a roller screen device, and the present invention can be applied to any device that suspends a solar shading body. For example, the present invention may be applied to a solar shading device that has a screen portion as the solar shading body but does not have a winding drum for winding up the screen portion. Also, for example, the present invention may be applied to a blind device that has a plurality of slats arranged vertically and extending horizontally as the solar shading body. [Explanation of symbols]

[0036] 10, 60 Roll screen device, 12 Screen section, 14 Holding section, 15 Upper frame, 16 Winding drum, 18 Bottom rail, 20 Solar cell, 26 MPPT control board, 28 Charge / discharge control board, 29 Storage battery, 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, 45, 46 Additional frame, 50 Connector, 62 Power transmission coil section, 64 Power receiving coil section, 64, 66 Boards.

Claims

1. A solar shading device placed in the openings of a building, Solar shading device, A solar cell provided in the aforementioned solar shield, An upper frame provided above the aforementioned solar shield, A charge / discharge control board, housed within the upper frame, controls the charging and discharging of the power generated by the solar cell, An additional frame positioned to the side of the aforementioned solar shield, The additional frame includes a power supply unit for outputting power generated by the solar cells to the outside, A solar radiation shielding device equipped with the following features.

2. The solar radiation shielding device according to claim 1, further comprising a storage battery housed within the upper frame and controlled by the charge / discharge control board.

3. The solar radiation shielding device according to claim 1 or 2, further comprising an MPPT control board housed within the upper frame.

4. The solar radiation shielding device according to claim 1 or 2, wherein the power supply unit includes a power supply port.

5. The solar radiation shielding device according to claim 1 or 2, wherein the power supply unit includes a wireless power supply unit capable of non-contact power transmission.

6. The solar shading device is a roller screen device. The solar shading device according to claim 1 or 2, wherein the solar shading body includes a screen portion configured in sheet form.

7. A winding drum for winding up the aforementioned screen section, A motor for rotating the winding drum, A motor control board for controlling the motor is housed in the upper frame, The solar radiation shielding device according to claim 6, further comprising:

8. A roll screen device to be placed in an opening of a building, A screen section made up of a sheet, The solar cell provided in the screen portion, An upper frame provided above the screen section, A charge / discharge control board, housed within the upper frame, controls the charging and discharging of the power generated by the solar cell, A winding drum for winding up the aforementioned screen section, A motor for rotating the winding drum, A motor control board for controlling the motor is housed in the upper frame, A support member that supports the winding drum on the upper frame, The power transmission coil section provided on the winding drum, The power receiving coil section provided on the support member, Equipped with, A roller screen device that transmits power non-contactually between the power transmission coil and the power receiving coil, thereby extracting power generated by the solar cell.

9. The extracted power is transmitted by wiring formed on a circuit board housed within the upper frame, as described in claim 8.

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