Solar shading device

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 shading device such as a roller screen 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 comprises a solar shading body, a solar cell provided on the solar shading body, an upper frame provided above the solar shading body, and a charge / discharge control board housed within the upper frame that controls the charging and discharging of electricity generated by the solar cell. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic front view of a roller blind device according to an 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 main part of a roller screen device according to another 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] Here, a roller blind device is shown as one embodiment of the solar shading device. Fig. 1 is a schematic front view of a roller blind device 10 according to the 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 mullions (vertical frames) 101, 102 extending vertically and mullions (horizontal frames) 103, 104 extending horizontally.

[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, a holding portion 14 for suspending and holding the screen portion 12, and additional frames 45, 46 arranged on the sides of the screen portion 12.

[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 provided above the screen unit 12. The upper frame 15 is a hollow block of 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 additional frames 45, 46 are hollow rectangular timbers, and are arranged on the sides of the screen section 12 so that their longitudinal direction is parallel to that of the uprights 101, 102. The additional frames 45, 46 may be members whose cross section perpendicular to the longitudinal direction is U-shaped. The additional frame 45 on the left side is attached to the upright 101, and the additional frame 46 on the right side is attached to the upright 102. In FIG. 1, the additional frames are attached to the inside surface of the upright, but they may also be attached to the back surface of the upright (the surface facing the room). In this case, the additional frames will appear to be integrated with the uprights. The method of fixing the additional frames to the uprights is not particularly limited, and may be screw fastening, adhesive bonding, fitting, welding, etc.

[0018] 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 fixed to the sides of the additional frames 45, 46, or may be provided on the back or side of the uprights 101, 102. 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. By providing the guide rails, it is possible to prevent light leakage 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, it is expected to have the effect of suppressing wrinkles in the screen unit 12.

[0019] Fig. 2 is a schematic front view for explaining the configuration of the roller blind device 10. In Fig. 2, the interiors of the upper frame 15, the winding drum 16, the screen unit 12, and the additional frame 45 are shown in a see-through manner for the purpose of explanation. Fig. 3 is a schematic vertical cross-sectional view for explaining the configuration 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.

[0020] 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.

[0021] 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.

[0022] At the upper 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 upper 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 winding 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 winding drum 16, are drawn out to the outside of the winding drum 16, and are drawn into the upper frame 15.

[0023] In the roller blind 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 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 charging and discharging of the storage battery 29 is controlled by the charge / discharge control board 28.

[0024] In the roller blind 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 the positive lead wire 23 and the negative lead wire 24. By inserting the connector 50 of the charging cable into the socket 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. The power supply board 30 and the power supply port 32 may also 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, a wireless power supply unit capable of transmitting power contactlessly may be provided as a power supply unit for outputting power to the outside. 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 may be an electromagnetic induction method or a magnetic field resonance method.

[0026] 2, a tubular motor 34 for rotating the winding drum 16 is disposed inside the winding drum 16. By driving the tubular motor 34, the screen unit 12 can be raised and lowered.

[0027] In the roller blind device 10 according to this embodiment, the upper frame 15 contains 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. In FIG. 2, the power line 41 is drawn out from the upper frame 15 to the outside, but the power line 41 may be drawn out from the lower end of the additional frame. The motor control board 36 drives the tubular motor 34 using power from the outlet. The tubular motor 34 may also be driven using power stored in the storage battery 29. In this case, energy saving is possible.

[0028] The configuration of the roller blind device 10 according to this embodiment has been described above. When the power generated by the solar cell 20 is charged to a storage battery located far away, the wiring length becomes long, and in addition to securing the wiring space, the installation becomes complicated, and there is a possibility that the loss of power becomes large. On the other hand, in the roller blind device 10 according to this embodiment, the power generated by the solar cell 20 can be charged with low loss to the storage battery 29 housed in the upper frame 15 located nearby, or outputted with low loss to the outside from the power supply port 32 provided in the additional frame 45, so that the generated power can be used effectively.

[0029] In the roller blind 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 blind device 10 in an opening 100 of a building, 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 allows the winding drum 16, the screen section 12, and the bottom rail 18 to be attached to the opening 100. Next, the additional frames 45, 46 are installed. Finally, the power cord 41 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, since it is only necessary to install the roller blind device 10 assembled in a factory in the opening 100 of the building.

[0030] As shown in Fig. 3, the roller blind device 10 according to this embodiment can be attached to a blind box 110 of a building. In this case, the upper frame 15 housing the control board and the storage battery 29 can be placed inside the blind box 110, so that the control board and the storage battery 29 can be prevented from being exposed to direct sunlight, and the blind box acts as a heat sink, so that the temperature rise of the control board and the storage battery 29 can be suppressed. This eliminates the need to provide a fan for exhausting heat inside the upper frame 15, so that low power consumption, low cost, and quiet operation can be achieved. In order to further improve the heat exhausting property, an opening for exhausting heat to, for example, the ceiling space may be provided in a part of the blind box 110.

[0031] 4 is a schematic front view of the main parts of a roller blind 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 unit 12, the lead wires rotate as the screen unit 12 is wound up, which poses a problem that the lead wires are prone to tangling and damage. A method using a slip ring can be considered to solve this problem, but here we propose a method using wireless power transmission (non-contact power transmission).

[0032] As shown in FIG. 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 is mainly composed of a power transmission coil and a power transmission control board, and the power receiving coil section 64 is mainly composed 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 a current flows through the power transmission coil section 62, electromagnetic induction occurs, and a 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 a situation in which the lead wires become entangled when 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] In addition, in the roller blind device 60 according to this embodiment, the extracted power is transmitted through wiring formed on the multiple boards 66. The multiple boards 66 include the MPPT control board 26 and the charge / discharge control board 28 housed in the upper frame 15. As shown in FIG. 4, the ends of the boards 66 are abutted against each other to transmit power between the boards 66. In this way, transmitting power through wiring formed on the boards 66 eliminates the need for a wiring structure and wiring work using lead wires that tend to get tangled and are difficult to handle, making it possible to reduce costs. Furthermore, if these boards are configured as a single board, the wiring between the boards can be reduced, thereby reducing the production process and reducing costs.

[0034] 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.

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

[0036] 10, 60 roller 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 board.

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; an upper frame provided above the solar radiation shielding body; a charge / discharge control board accommodated in the upper frame for controlling charging and discharging of the electric power generated by the solar cell; The solar radiation shielding device comprising the above.

2. The solar radiation shielding device according to claim 1, further comprising a storage battery accommodated in 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 accommodated in the frame.

4. The solar radiation shielding device according to claim 1 or 2, further comprising a power supply unit for outputting the electric power generated by the solar cell to the outside.

5. The solar radiation shielding device according to claim 4, further comprising an additional frame disposed on a side of the solar radiation shielding body, wherein the power supply unit is provided on the additional frame.

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

7. The solar radiation shielding device according to claim 4, wherein the power supply unit includes a wireless power supply unit capable of non-contact power transmission.

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

9. a winding drum for winding the screen portion; a motor for rotating the winding drum; a motor control board accommodated in the upper frame for controlling the motor; The solar radiation shielding device according to claim 8, further comprising the above.

10. a power transmission coil portion provided on the winding drum; a power reception coil portion provided on a support member of the winding drum; comprising The solar radiation shielding device according to claim 9, wherein power is transmitted non-contact between the power transmission coil portion and the power reception coil portion, and the electric power generated by the solar cell is taken out.

11. The solar radiation shielding device according to claim 10, wherein the taken-out electric power is transmitted by wiring formed on a board accommodated in the upper frame.

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