JP2013076293A - Roll screen device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll screen device which can be used in a state causing no trouble due to flowing of electric current to a solar cell module which is not irradiated by sunlight.SOLUTION: A roll screen device 1 includes: a winding pipe 30; a support part 40; a pair of main output terminals 51 fixed to the support part 40; a screen 10 where a plurality of solar cell modules 20 are disposed on one surface and one end is connected to the winding pipe 30; and output means (31, 37 etc.) which forms a state where electric current does not flow to respective solar cell modules 20 entirely or partially disposed in unexposed area, wound up by the winding pipe 30, of the screen 10, and synthesizes the outputs of other respective solar cell modules 20 to output it from the pair of main output terminals 51.

Description

  The present invention relates to a roll screen device including a screen on which a plurality of solar cell modules are arranged.

A solar cell is a clean energy source that does not generate greenhouse gases such as CO ₂ that can generate electricity as long as there is sunlight. And since the roll screen device is a device arranged near the window so that sunlight does not enter the indoors through a window or the like, in order to effectively use the sunlight shielded by the roll screen device, It has been proposed to attach a solar cell to the screen portion (see, for example, Patent Documents 1 and 2).

JP 2008-42142 A Registered Utility Model No. 3143588

  A screen with a solar cell (a screen on which a solar cell is attached) has several solar cell modules (a group of solar cells provided with a pair of output terminals) arranged on the screen. In addition, the solar cell modules on the screen are connected in series or in parallel (or series-parallel), but the solar cell module that is not exposed to sunlight functions as a resistor. Therefore, when a plurality of solar cell modules on the screen are connected in series, the output voltage is drastically reduced simply because the screen is slightly wound up and sunlight does not hit the solar cell module located on the upper end side of the screen. become. Moreover, the solar cell module which is not exposed to sunlight will generate heat and deteriorate.

  On the other hand, if a plurality of solar cell modules are arranged in the length direction of the screen and these solar cell modules are connected in parallel, the output voltage does not change in principle even if the screen is rolled up, It is possible to realize a roll screen device that is less likely to be deteriorated by heat generation of a solar cell module that is not exposed to light. However, when a roll screen device employing such a screen is used with the output terminal open and the screen rolled up halfway, the output of each solar cell module that is exposed to sunlight will cause Each solar cell module that is involved will generate heat and deteriorate.

  Then, the subject of this invention is providing the roll screen apparatus which can be used in the form which does not produce the above malfunctions.

In order to solve the above-mentioned problems, a roll screen device according to a first aspect of the present invention includes a winding pipe, a support portion that rotatably supports the winding pipe, and a pair of main members fixed to the support portion. An output terminal and a screen having a plurality of solar cell modules disposed on one surface, and one end of the screen is wound so that winding on the winding pipe and unwinding from the winding pipe are possible. All or a part of each of the screens connected to the pipes and the non-exposed areas of the plurality of solar cell modules that are wound around the winding pipes of the screens. An output means for forming a state in which no current flows in the solar cell module and combining the outputs of the other solar cell modules and outputting them from a pair of main output terminals is provided.

  That is, the above-mentioned problems are caused by current flowing through “each solar cell module in which all or part of the portion is arranged in the non-exposed region wound around the screen winding pipe”. is there. Therefore, the roll screen device according to the first aspect of the present invention having the above-described configuration is a device that can be used without causing the above-described problems.

  As the output means of the roll screen device according to the first aspect of the present invention, means for “outputting the sum of output voltages of other solar cell modules from a pair of main output terminals” may be adopted. Means for outputting the sum of the output currents of the battery modules from a pair of main output terminals (means for supplying the outputs of the respective solar cell modules to the pair of main output terminals in parallel) may be employed. However, the latter output means is an inefficient means unless the output voltage of each solar cell module that receives sunlight is the same. And since the output voltage of each solar cell module that is exposed to sunlight is not always the same, as the output means, the former means that functions without problem even if the output voltage of each solar cell module is not the same is adopted It is preferable to keep it.

  The output means of the roll screen apparatus according to the first aspect of the present invention may be realized by using an electronic device (such as a rotary encoder). As the output means, “a pair of main output terminals and a plurality of main output terminals” are used. All the parts or some of the parts are arranged in the non-exposed area by mechanically changing the electrical connection path between the output terminals of the solar cell module according to the rotation angle of the winding pipe If a method that forms a state in which no current flows in the solar cell module and combines the outputs of the other solar cell modules and outputs them from a pair of main output terminals is manufactured, a roll screen device can be manufactured at low cost. It will be possible.

  In order to solve the above problem, the roll screen device according to the second aspect of the present invention includes a winding pipe, a support portion that rotatably supports the winding pipe, and N (≧ 2) on one surface. ) A screen on which a plurality of solar cell modules are disposed, and a screen having one end connected to the take-up pipe so that the take-up and unwind from the take-up pipe are possible; N pairs of output extraction terminals fixed to the support portion, each of which is electrically connected to one pair of output terminals of different solar cell modules among the N solar cell modules Output output terminal.

  That is, the roll screen device according to the second aspect of the present invention has a configuration (a configuration including N pairs of output extraction terminals) that can individually extract the outputs of the solar cell modules on the screen. And if the output of each solar cell module can be taken out individually, "each solar cell module in which all or part of the part is arranged in the non-exposed area wound around the screen winding pipe" It is possible to prevent current from flowing. Therefore, it can be said that the roll screen device according to the second aspect of the present invention is also a device that can be used without causing the above-described problems.

  ADVANTAGE OF THE INVENTION According to this invention, the roll screen apparatus which can be used in the form which does not produce the malfunction which arises because an electric current flows into each solar cell module which does not receive sunlight can be provided.

FIG. 1 is an external view of a roll screen device according to a first embodiment of the present invention. FIG. 2 is an explanatory diagram of a screen configuration that can be employed in the roll screen device according to the first embodiment. FIG. 3 is an explanatory diagram of a screen configuration that can be employed in the roll screen device according to the first embodiment. FIG. 4 is an explanatory diagram of the configuration of the roll screen device according to the first embodiment. FIG. 5 is an explanatory diagram of a switching mechanism provided in the roll screen device according to the first embodiment. FIG. 6 (FIGS. 6A to 6C) is an explanatory diagram of functions (operation contents) of the roll screen device according to the first embodiment. FIG. 7 is an external view of a roll screen device according to the second embodiment of the present invention. FIG. 8 is an explanatory diagram of an output control unit provided in the roll screen device according to the second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<< First Embodiment >>
In FIG. 1, the external appearance seen from the outdoor side of the roll screen apparatus 1 which concerns on 1st Embodiment of this invention is shown.

  The roll screen device 1 according to the present embodiment is a kind of pull cord type (spring type) roll screen, and includes a screen 10, a winding pipe 30, a support portion 40, an output terminal portion 50, and the like as illustrated. ing.

  The screen 10 is a member in which four solar cell modules 20a to 20d are arranged on the screen base material 25 in the length direction of the screen base material 25 (screen 10). Hereinafter, for convenience of explanation, when the position on the screen base material 25 is irrelevant, each of the solar cell modules 20a, 20b, 20c, and 20d will be referred to as the solar cell module 20. In the present specification, the solar cell module 20 is a unit in which a plurality of solar cells are connected in series or in series and parallel so that output can be taken out from a pair of output terminals.

  The screen 10 used as a component of the roll screen apparatus 1 is “a plurality of solar cell modules 20 are arranged on the screen base 25 in the length direction of the screen base 25 (screen 10), or It is only necessary that the member has a certain degree of flexibility. Therefore, as shown in FIG. 2, the screen 10 includes a screen base 25, a plurality of solar cell modules 20 (a plurality of solar cells 11 in each figure), a weather-resistant protective film 12, a sealing material 13a, a sealing member. What consists of the stopping material 13b, the back sheet 14, the sealing material 15, and the screen base material 25 can be used. Further, as shown in FIG. 3, a screen 10 further provided with an ultraviolet cut film 16 can be used.

  As shown in FIG. 1, the upper end of the screen 10 is connected to the take-up pipe 30 so as to be able to take up and unwind from the take-up pipe 30. A bottom bar 38 is provided at the lower end of the screen 10. A pull cord is attached to the center of the bottom bar 38.

The winding pipe 30 is a pipe-shaped member for winding the screen 10. The outer diameter of the winding pipe 30 is (1) the length of the screen 10, and (2) if the outer diameter of the winding pipe 30 is too small, the screen 10 is likely to be damaged when the screen 10 is wound. 3) When the outer diameter of the winding pipe 30 is too large, the weight and volume of the winding pipe 30 are increased, so that workability is deteriorated. For example, when the length of the screen 10 is about 2 m, the roll screen device 1 is obtained in which the screen 10 is hardly damaged and the workability is good if the winding pipe 30 having an outer diameter of about 60 mm to 80 mm is used. Can do. In addition, although the constituent material of the winding pipe 30 may be anything, lightweight aluminum is suitable.

  In the winding pipe 30, an urging mechanism (not shown) for urging the winding pipe 30 with a rotational force in the winding direction of the screen 10 is provided. A brake mechanism (not shown) is provided in the winding pipe 30 so that the winding speed of the screen 10 is always equal to or lower than a predetermined speed (so as not to be excessively high). In the winding pipe 30, the winding pipe 30 whose rotational force is biased by the biasing mechanism is in a state where only a part of the screen 10 is wound (the amount of the screen 10 pulled out from the winding pipe 30 is small). A stop position control mechanism (not shown) for stopping in any one of a plurality of different states is also provided. Since these mechanisms are essentially the same as those provided in the winding pipe of the existing pull cord type roll screen, detailed description of each mechanism will be omitted.

  The support portion 40 is a member configured to rotatably support the winding pipe 30 configured by combining a plurality of members. When the roll screen device 1 is attached to the window, the support portion 40 is fixed directly inside or outside the window frame or via another member.

  An output terminal unit 50 including a pair of main output terminals 51 for connecting a power supply target device (battery, power conditioner, etc.) is attached to the support unit 40.

  Based on the above, the configuration of the roll screen device 1 according to the present embodiment will be described more specifically below.

As schematically shown in FIG. 4, the solar cell modules 20 a to 20 d on the screen 10 (screen substrate 25) of the roll screen device 1 are connected in series. Further, in the winding pipe 30 of the roll screen device 1, a switching mechanism 31 (details will be described later) having _first to fourth input terminals 32 _{1 to} 32 ₄ and one output terminal 33, and a two-pole type The rotary connector 37 is provided.

The + terminal 26dp of the solar cell module 20d, the + terminal 26cp of the solar cell module 20c, the + terminal 26bp of the solar cell module 20b, and the + terminal 26ap of the solar cell module 20a are the first to fourth input terminals of the switching mechanism 31, respectively. 32 _{1 to} 32 ₄ are connected. In addition, as already demonstrated, the solar cell modules 20a-20d are connected in series. Therefore, the first to third input terminals 32 _{1 to} 32 ₃ of the switching mechanism 31 are also connected to the negative terminal 26 cm of the solar cell module 20 c, the negative terminal 26 bm of the solar cell module 20 b, and the negative terminal 26 am of the solar cell module 20 a, respectively. Has been.

  The rotary connector 37 is accommodated in the take-up pipe 30 such that only one portion rotates together with the take-up pipe 30. The two input terminals of the rotary connector 37 (the two terminals provided at the portion rotating with the winding pipe 30 of the rotary connector 37) are the output terminal 33 of the switching mechanism 31 and the solar cell module 20d, respectively. -Terminal 26dm. In addition, each output terminal of the rotary connector 37 (each terminal provided in a portion that does not rotate with the winding pipe 30 of the rotary connector 37) is connected to a main output terminal 51 having a corresponding polarity.

The switching mechanism 31 is a mechanism that combines a rotary switch and a reduction gear. Specifically, as schematically shown in FIG. 5, the switching mechanism 31 includes the first to fourth input terminals 32 ₁ to 32 ₁ .
And an electrode plate 34 having a 32 ₄ fan electrodes 35 ₁ to 35 ₄ connected to. The switching mechanism 31, a rotating member can be rotated relative to the electrode plate 34 (not shown), and, with respect to the rotation member so as to move each fan-shaped electrodes 35 ₁ to 35 ₄ on with the rotation of the rotary member And an electrode 36 attached thereto. Although not explicitly shown in FIG. 5, the electrode 36 has a shape that does not contact the two adjacent fan-shaped electrodes 35 at the same time.

  Furthermore, the switching mechanism 31 includes a reduction gear (not shown) that rotates the rotating member at a speed k (<1) times the rotational speed of the winding pipe 30. The switching mechanism 31 is manufactured by determining the reduction ratio of the reduction gear, the shape of each fan-shaped electrode 35, and the like so as to satisfy the following conditions.

· If the screen 10 is completely drawn out from the winding pipe 30, the electrode 36 is positioned at the position P4 (the electrode 36 is in contact with the fan-shaped electrode 35 _4).
When the portion of the screen 10 on which the solar cell module 20a is disposed starts to be wound around the winding pipe 30, the electrode 36 is positioned at the position P3 (the electrode that contacts the electrode 36 becomes the fan-shaped electrode 35 ₃ change).
When portions solar cell module 20b is arranged in the screen 10 started being taken up on the take-up pipe 30, the electrode 36 is positioned at the position P2 (electrodes in contact with the electrode 36, the fan-shaped electrodes 35 ₂ change).
When portions solar cell module 20c is disposed in screen 10 started being taken up on the take-up pipe 30, the electrode 36 is located at the position P1 (the electrode in contact with the electrode 36, the fan-shaped electrodes 35 ₁ change).
When the portion of the screen 10 where the solar cell module 20d is disposed starts to be wound around the winding pipe 30, the electrode 36 is positioned at the position P0 (the electrode 36 is not in contact with any fan-shaped electrode 35) Becomes).

  Although it is considered to be clear from the above description, here, the function of the roll screen device 1 according to the present embodiment will be described with reference to FIG.

Rolling screen device 1, when the screen 10 is completely drawn out from the winding pipe 30, (see FIG. 5) electrode 36 of the switching mechanism 31 is located at a position P4 / fan electrodes 35 ₄ and the contacting device It is. The electrode 36 is connected to one main output terminal 51 via a rotary connector 37, the fan-shaped electrodes 35 _4, other three solar cell modules 2
0 series the connected solar cell module 20a + terminal 26Ap (see FIG. 4), is connected a fourth input terminal 32 ₄ through.

  The negative terminal 26 dp (see FIG. 4) of the solar cell module 20 d connected in series with the other three solar cell modules 20 is connected to the other main output terminal 51 via the rotary connector 37.

  Therefore, when the screen 10 is completely pulled out from the winding pipe 30, as schematically shown in FIG. 6A from the pair of main output terminals 51 of the roll screen device 1, the solar cell module 20a. The sum of the output voltages of ˜20d is output. Here, the screen 10 being completely drawn out from the winding pipe 30 means that 70% or more of the area of the solar cell module 20 is drawn out. Preferably, it is 80% or more, more preferably 90% or more.

Further, if a portion of the screen 10 is no longer shielded from wound into sunlight only to the solar cell module 20a, the electrode 36 of the switching mechanism 31 is in contact with the fan-shaped electrode 35 _3. The positive electrode 26 bp of the solar cell module 20b is connected to the fan-shaped electrode 35 ₃ .

  Therefore, in this case, the sum of the output voltages of the solar cell modules 20d to 20d is output from the pair of main output terminals 51 of the roll screen device 1 as schematically shown in FIG. Become. Further, the solar cell module 20a that is not exposed to sunlight (taken up by the take-up pipe 30) takes a state in which no current flows (a state in which one terminal is open).

In addition, when most of the screen 10 (about 3/4 of the upper end side) is wound and only the solar cell module 20d is exposed to sunlight, the electrode 36 in the switching mechanism 31 is a solar cell. module 20d + terminal 26dp is in contact with the fan-shaped electrode 35 ₁ is connected.

  Accordingly, in this case, the output voltage of the solar cell module 20d is output from the pair of main output terminals 51 of the roll screen device 1 as schematically shown in FIG. In addition, each of the other solar cell modules 20 that are not exposed to sunlight (taken up by the take-up pipe 30) takes a state in which no current flows.

  In this way, the roll screen device 1 is controlled so that each solar cell module 20, all or part of which is wound around the winding pipe 30, does not flow current, and each other solar cell. The sum of the output voltages of the module 20 is configured to be output from the main output terminal 51.

  Therefore, this roll screen device 1 is a device that can be used in a form that does not cause the above-described problems caused by current flowing through each solar cell module that is not exposed to sunlight.

  In the roll screen device 1 of the present invention, it is preferable from the viewpoint of power generation efficiency to increase the installation area of the solar cell module as much as possible. A method for increasing the installation area of the solar cell module as much as possible is not particularly limited, but a method for installing the solar cell module as large as possible with respect to the screen 10 or the roll screen device 1 from the end of the screen 10 is possible. A method of shortening the length of the end portion is mentioned. In order to shorten the length of the end portion of the roll screen device 1 from the end portion of the screen 10, a method of reducing the connection mechanism 40 can be mentioned. The length from the end of the screen 10 to the end of the roll screen device 1 is preferably 80 mm or less, more preferably 60 mm or less, more preferably 40 mm or less, and particularly preferably 30 mm or less. By shortening the length of the end portion of the roll screen device 1 from the end portion of the screen 10, not only securing the power generation area, but also when a plurality of roll screen devices 1 are installed, the interval between the roll screen devices can be reduced. And can improve the light shielding property.

  Finally, an example of materials that can be used for manufacturing the screen 10 and an example of a method for manufacturing the screen 10 will be described.

[Solar cell 11]
The solar battery cell 11 only needs to have a certain degree of flexibility (it is difficult to break even when bending stress is repeatedly applied). Therefore, as the solar battery cell 11, an amorphous silicon solar battery cell, an organic solar battery cell, a compound semiconductor solar battery cell, or the like can be used.

Amorphous silicon solar cells have the advantage that they can sufficiently absorb sunlight even with a thin film having a thickness of about 1 μm. Amorphous silicon is an amorphous material with high resistance to bending. Therefore, if an amorphous silicon solar battery cell is employed as the solar battery cell 11, the thin and light screen 10 is less likely to cause destruction / performance deterioration of the solar battery cell 11 due to winding on the winding pipe 30. Can be realized.

Moreover, an organic solar cell can also be used as the solar cell 11. Here, the organic solar battery cell is a solar battery cell in which an organic semiconductor is used for the light absorption layer (photoelectric conversion layer). In addition, as an organic semiconductor which can be used as a constituent element of an organic solar battery cell, for example, naphthalene (or perylene) tetracarboxylic acid diimide, fullerene (C ₆₀ ) and derivatives thereof are known. In addition, for example, conjugated polymers such as polythiophene, polyfluorene, polythienylene vinylene, polyacetylene, polyaniline; and polymer semiconductors such as alkyl-substituted oligothiophene are also known.

Moreover, a compound semiconductor solar cell can also be used as the solar cell 11. Among compound semiconductor solar cells, I-III-VI group ₂ semiconductor (chalcopyrite) solar cells capable of obtaining high photoelectric conversion efficiency are preferable, and Cu-III- using Cu as the group I element is particularly preferable. VI Group ₂ semiconductor solar cells are preferred. Here, the Cu-III-VI group ₂ semiconductor solar cell is a solar cell having a Cu-III-VI group ₂ semiconductor as a constituent material. The Cu-III-VI group ₂ semiconductor is a semiconductor made of a compound containing Cu, a group III element, and a group VI element in a ratio of 1: 1: 2. Examples of the Cu-III-VI ₂ group semiconductor include CuInSe ₂ , CuGaSe ₂ , Cu (In _1-x Ga _x ) Se ₂ , CuInS ₂ , CuGaS ₂ , Cu (In _1-x Ga _x ) S ₂ , CuInTe _2. CuGaTe ₂ and Cu (In _1-x Ga _x ) Te ₂ .

The constituent material of the compound semiconductor solar cell used as the solar cell 11 may be a mixture of two or more of these. In addition, as a compound semiconductor solar cell, a CIS solar cell and a CIGS solar cell are particularly preferable. Here, the CIS solar cell is a solar cell having a CIS semiconductor as a constituent material, and the CIS semiconductor is CuIn (Se _1-y S _y ) ₂ [0 ≦ y ≦ 1]. That is. That is, CIS
The system semiconductor is CuInSe ₂ , CuInS ₂ , or those in a mixed state.

In addition, the CIGS-based solar cells is that of the solar cell having a CIGS semiconductor as a constituent material, a CIGS-based _{semiconductor, Cu (In 1-x Ga} x) (Se 1-y S y) 2 [
0 <x <1, 0 ≦ y ≦ 1]. In addition, Cu (In _1-x Ga _x ) Se ₂ is usually
It is a mixed crystal of CuInSe ₂ and CuGaSe ₂ . Also, the range of x is usually greater than 0, preferably greater than 0.05, more preferably greater than 0.1, and usually less than 0.8, preferably less than 0.5, more preferably 0. Less than 4.

[Weather-resistant protective film 12]
The weather-resistant protective film 12 is a film for protecting the solar battery cell 11 from weather changes. Some constituent elements of the solar battery cell 11 are deteriorated due to temperature change, humidity change, natural light, erosion caused by wind and rain, and the like. Therefore, it is desirable to prevent the power generation capacity from deteriorating by covering the solar cells 11 with the weather-resistant protective film 12 to protect the solar cells 11 from weather changes.

  Since the weather-resistant protective film 12 is located on the outermost layer of the screen 10, the surface covering material of the screen 10 (solar cell 11) such as weather resistance, heat resistance, transparency, water repellency, stain resistance, mechanical strength, etc. It is preferable to have a property suitable for the above and to maintain it for a long period of time in outdoor exposure.

  The screen 10 is preferably one that can be compactly wound. Therefore, the weather-resistant protective film 12 is preferably thin. Usually, it is 10 μm or more, preferably 15 μm or more, more preferably 20 μm or more, and is usually 200 μm or less, preferably 180 μm or less, more preferably 150 μm or less, and further preferably 100 μm or less. When the weather-resistant protective film 12 is thinned, the flexibility is increased, so that the film can be easily wound. However, it is not preferable that the weather-resistant protective film 12 is too thin. This is because if the weather-resistant protective film 12 is too thin, the weather resistance cannot be ensured.

  Moreover, from the viewpoint that the weather-resistant protective film 12 does not hinder the light absorption of the solar battery cell 11, a film that transmits visible light is preferable. For example, the visible light (wavelength 360 to 830 nm) light transmittance of the weather-resistant protective film 12 is preferably 80% or more, more preferably 90% or more, and particularly preferably 95%.

  Furthermore, since the screen 10 is often heated by receiving light, the weather-resistant protective film 12 preferably has heat resistance. From this viewpoint, the melting point of the constituent material of the weather-resistant protective film 12 is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 350 ° C. or lower, preferably 320 ° C. or lower. Preferably it is 300 degrees C or less. By increasing the melting point, it is possible to reduce the possibility that the weather-resistant protective film 12 is melted and deteriorated when the screen 10 is used.

  The material which comprises the weather-resistant protective film 12 is arbitrary if it can protect the photovoltaic cell 11 from a weather change.

  In addition, the weather-resistant layer is provided with functions such as ultraviolet ray blocking, heat ray blocking, antifouling property, antifogging property, abrasion resistance, conductivity, antireflection, antiglare property, light diffusion, light scattering, wavelength conversion property, etc. May be. In particular, since the screen 10 is exposed to strong ultraviolet rays from sunlight, the weather resistant layer may have an ultraviolet blocking function. The UV blocking function can be achieved by laminating a layer having an UV blocking function on the weather resistant layer by coating film formation, etc., or by dissolving and dispersing a material that exhibits the UV blocking function. Can be applied to the weathering layer.

  In addition, the weather-resistant protective film 12 may be formed with 1 type of material, and may be formed with 2 or more types of materials. Moreover, although the weather-resistant protective film 12 may be formed with the single layer film, the laminated | multilayer film provided with the film of two or more layers may be sufficient as it.

  Further, the weatherproof protective film 12 may be subjected to surface treatment such as corona treatment or plasma treatment in order to improve adhesion with other films.

  The weatherproof protective film 12 is preferably provided on the outer side of the screen 10 as much as possible. This is because more components of the screen 10 can be protected. Therefore, it is preferable to provide the weather-resistant protective film 12 on the outermost surface of the screen 10.

  Furthermore, in order to eliminate the possibility that the surface of the screen base material 25 where the solar battery cells 11 are not provided (inside the room) and the surface side of the weather-resistant protective film 12 are bonded in the wound state. You may emboss the surface of the weather-resistant protective film 12. The embossing of the surface of the screen 10 is also effective for making the screen 10 not dazzling when viewed from the outside.

[Encapsulant 13a]
The sealing material 13 a is a film that reinforces the solar battery cell 11. Since the solar cells 11 are thin, the strength is usually weak, and thus the strength of the screen 10 tends to be weak. However, the strength can be kept high by the sealing material 13a.

  In order to allow the screen 10 to be wound compactly, the sealing material 13a is preferably thin. Usually, it is 50 μm or more, preferably 100 μm or more, more preferably 150 μm or more, and usually 500 μm or less, preferably 450 μm or less, more preferably 400 μm or less. Thinning increases flexibility and makes winding easier. However, if it is too thin, strength is not ensured, which is not preferable.

  Further, the sealing material 13a preferably has high strength from the viewpoint of maintaining the strength of the screen 10. The specific strength is related to the strength of the weatherproof protective film 12 other than the sealing material 13a and the strength of the back sheet 14, and is difficult to define unconditionally. It is desirable to have adhesiveness and strength so that peeling or deformation does not occur in each part of the screen 10 even if it is wound or stretched around 30.

  In addition, the sealing material 13a is preferably one that transmits visible light from the viewpoint of not preventing the solar cell 11 from absorbing light. For example, the transmittance of visible light (wavelength 360 to 830 nm) of the sealing material 13a is usually 60% or more, preferably 70% or more, more preferably 75% or more, still more preferably 80% or more, and particularly preferably. It is 85% or more, particularly preferably 90% or more, particularly preferably 95% or more, and particularly preferably 97% or more. This is to convert more sunlight into electrical energy.

  Furthermore, since the screen 10 is often heated by receiving light, it is preferable that the sealing material 13a also has heat resistance. From this viewpoint, the melting point of the constituent material of the sealing material 13a is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 350 ° C. or lower, preferably 320 ° C. or lower, more preferably. Is 300 ° C. or lower. By increasing the melting point, the possibility that the sealing material 13a is melted and deteriorated when the roll screen device 1 is used can be reduced.

[Encapsulant 13b]
The sealing material 13b is a film similar to the sealing material 13a described above, and the same material as the sealing material 13a can be used in the same manner except that the arrangement position is different. The thickness is the same as that of the sealing material 13a. Moreover, since the constituent member on the back side of the solar battery cell 11 does not necessarily need to transmit visible light, the sealing material 13b may be one that does not transmit visible light.

[Backsheet 14]
The back sheet 14 is preferably thin so that the screen 10 can be compactly wound. It is usually 10 μm or more, preferably 15 μm or more, more preferably 20 μm or more, and is usually 200 μm or less, preferably 180 μm or less, more preferably 150 μm or less. Thinning tends to increase flexibility and facilitates winding, but too thin is not preferable because weather resistance is not ensured.

  The back sheet 14 is the same film as the weather-resistant protective film 12 described above, and the same film as the weather-resistant protective film 12 can be used in the same manner except that the arrangement position is different. Moreover, since the constituent member on the back side of the solar battery cell 11 does not necessarily need to transmit visible light, a member that does not transmit visible light can be used. For this reason, as the back sheet | seat 14, what is demonstrated below can also be used.

  For example, polyethylene resin, polypropylene resin, cyclic polyolefin resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyvinyl chloride resin, fluorine Resins, poly (meth) acrylic resins, polycarbonate resins, polyester resins such as polyethylene terephthalate or polyethylene naphthalate, polyamide resins such as various nylons, polyimide resins, polyamideimide resins, polyarylphthalate resins Sheet of various resins such as silicone resin, polysulfone resin, polyphenylene sulfide resin, polyethersulfone resin, polyurethane resin, acetal resin, cellulose resin, etc. It is possible to use.

  Among these resin sheets, it is preferable to use a fluorine resin, a cyclic polyolefin resin, a polycarbonate resin, a poly (meth) acrylic resin, a polyamide resin, or a polyester resin sheet. Specific examples of the fluorine resin include polytetrafluoroethylene (PTFE), 4-fluorinated ethylene-perchloroalkoxy copolymer (PFA), 4-fluorinated ethylene-6-fluorinated propylene copolymer (FEP). , 2-ethylene-4-fluoroethylene copolymer (ETFE), poly-3-fluoroethylene chloride (PCTFE), polyvinylidene fluoride (PVDF), and polyvinyl fluoride (PVF). In addition, these may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.

[Sealant 15]
In order to seal the edges of the weatherproof protective film 12, the sealing materials 13a and 13b, and the back sheet 14 described above, the sealing material 15 may be used. Since the screen 10 is often heated by receiving light, it is preferable that the sealing material 15 also has heat resistance. From this viewpoint, the melting point of the constituent material of the sealing material 15 is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 250 ° C. or lower, preferably 200 ° C. or lower, more preferably. 180 ° C. or lower. If the melting point is too low, the sealing material 15 may melt when the thin film solar cell 100 is used.

  Examples of the material constituting the sealing material 15 include polymers such as a fluorine resin, a silicone resin, and an acrylic resin. Note that the sealing material 15 may be formed of one kind of material or two or more kinds of materials.

  The sealing material 15 is provided at a position where each film other than the weather-resistant protective film 12 and the back sheet 14 of the screen 10 can be sealed. Thereby, the space surrounded by the sealing material 15 can be sealed, and moisture and oxygen can be prevented from entering the space.

  The sealing material 15 can be formed by various methods. For example, it can be formed by injecting the constituent material of the sealing material 15 between the weather-resistant protective film 12 and the back sheet 14.

[Screen base material 25]
In order to be able to wind up the screen 10 in a compact manner, the screen substrate 25 is preferably thin. Usually, it is 0.1 mm or more, preferably 0.15 mm or more, more preferably 0.2 mm or more, and usually 2 mm or less, preferably 1.5 mm or less, more preferably 1 mm or less. Thinning tends to increase flexibility and facilitates winding, but too thin is not preferable because strength is not ensured.

The material of the screen base material 25 may be a natural material such as Japanese paper, cotton or hemp, in addition to those made from a resin such as polypropylene or polyester. A polyester / cotton blend may also be used. The screen base material 25 may have a high light-shielding property or may have a low light-shielding property (so-called translucency). Further, the screen substrate 25 may have a heat shielding property.

  The screen substrate 25 may have any number of colors, and white, beige, brown, blue, green, and the like are preferably used from the viewpoint of design. Moreover, in order to improve designability, you may give a desired pattern especially indoor side. Furthermore, in order to eliminate the possibility that the surface of the screen base material 25 on which the solar battery cells 11 are not provided (inside the room) and the surface side of the weather-resistant protective film 12 are adhered in the wound state. The surface of the screen base 25 on the indoor side can be embossed.

[UV cut film 16]
The ultraviolet cut film 16 is a film that prevents transmission of ultraviolet rays. Since some components of the screen 10 are deteriorated by ultraviolet rays, the ultraviolet cut film 16 may be used.

  Since the screen 10 is desired to be compact in the wound state, the ultraviolet cut film 16 is preferably thin. Usually, it is 5 μm or more, preferably 10 μm or more, more preferably 15 μm or more, and is usually 200 μm or less, preferably 180 μm or less, more preferably 150 μm or less. Increasing the thickness tends to increase the absorption of ultraviolet rays, but if it is too thick, compactness cannot be secured.

  The degree of the ability to suppress the transmission of ultraviolet rays required for the ultraviolet cut film 16 is such that the transmittance of ultraviolet rays (for example, wavelength 300 nm) is preferably 50% or less, more preferably 30% or less, and particularly preferably. 10% or less.

  Moreover, the ultraviolet cut film 16 is preferably one that transmits visible light from the viewpoint of not preventing the light absorption of the solar battery cell 11. For example, the transmittance of visible light (wavelength 360 to 830 nm) is preferably 80% or more, more preferably 90% or more, and particularly preferably 95%.

  Furthermore, since the screen 10 is often heated by receiving light, the ultraviolet cut film 16 preferably has heat resistance. From this viewpoint, the melting point of the constituent material of the ultraviolet cut film 16 is usually 100 ° C. or higher, preferably 120 ° C. or higher, more preferably 130 ° C. or higher, and usually 350 ° C. or lower, preferably 320 ° C. or lower, more preferably. Is 300 ° C. or lower. If the melting point is too low, the ultraviolet cut film 16 may melt when the thin film solar cell 100 is used.

  Moreover, the ultraviolet-ray cut film 16 has a high softness | flexibility, its adhesiveness with an adjacent film is favorable, and what can cut water vapor | steam and oxygen is preferable.

  The material constituting the ultraviolet cut film 16 is arbitrary as long as it can weaken the intensity of ultraviolet rays. Examples of the material include films formed by blending an ultraviolet absorber with an epoxy, acrylic, urethane, or ester resin.

As the ultraviolet absorber, for example, a salicylic acid-based, benzophenone-based, benzotriazole-based, or cyanoacrylate-based one can be used. Of these, benzophenone and benzotriazole are preferable. Examples of this include various aromatic organic compounds such as benzophenone and benzotriazole. The ultraviolet absorber may be formed of one kind of compound or may be formed of two or more kinds of compounds. Moreover, you may use the film which formed the layer which disperse | distributed or melt | dissolved the ultraviolet absorber in resin on the base film. Or the film which formed the ultraviolet absorption layer on the base film can also be used. Such a film can be produced, for example, by applying a coating solution containing an ultraviolet absorber on a substrate film and drying it.

  Although the material of a base film is not specifically limited, For example, polyester is mentioned at the point from which the balance of heat resistance and a softness | flexibility is obtained.

  The ultraviolet cut film 16 may be formed of a single layer film, but may be a laminated film composed of two or more layers.

[Method for Manufacturing Screen 10]
Portions other than the screen substrate 25 of the screen 10 (hereinafter referred to as a solar cell portion) can be manufactured by various methods. For example, the solar cell unit of the type shown in FIG. 3 is generally composed of a plurality of solar cells 11 connected in series or in parallel between the weather-resistant protective film 12 and the back sheet 14 together with the sealing materials 13a and 13b. It can manufacture by laminating with a typical vacuum laminating apparatus. Also, the solar cell portion of the type shown in FIG. 4 can be manufactured by simultaneously laminating the ultraviolet cut film 16 or laminating several films at the time of laminating as described above.

  At this time, the heating temperature is usually 130 ° C. or higher, preferably 140 ° C. or higher, and is usually 180 ° C. or lower, preferably 170 ° C. or lower. The heating time is usually 10 minutes or longer, preferably 20 minutes or longer, usually 100 minutes or shorter, preferably 90 minutes or shorter. The pressure is usually 0.001 MPa or more, preferably 0.01 MPa or more, and usually 0.2 MPa or less, preferably 0.1 MPa or less. By making the pressure within this range, sealing can be performed reliably, and the sealing materials 13a and 13b from the end portions can be prevented from protruding and film thickness reduction due to over-pressurization, thereby ensuring dimensional stability.

  Examples of the fixing method between the screen base material 25 and the solar cell unit include a method using an adhesive and a sewing method.

  In order to eliminate the possibility that the surface of the screen substrate 25 on the side where the thin-film solar cell is not mounted (inside the room) and the surface side of the weather-resistant protective film 12 in the wound state are eliminated. You may emboss the surface of the indoor side.

<< Second Embodiment >>
Hereinafter, the configuration of the roll screen device 2 according to the second embodiment of the present invention will be described with reference to FIGS. 7 and 8. In addition, below, the detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol about the component essentially the same as the roll screen apparatus 1 of the roll screen apparatus 2. FIG.

  The roll screen device 2 according to the present embodiment is also a kind of pull cord type (spring type) roll screen, like the roll screen device 1. As shown in FIG. 7, the roll screen apparatus 2 includes a screen 10 ′, a winding pipe 30, a support portion 40, and the like.

Similarly to the screen 10, the screen 10 ′ is a member in which four solar cell modules 20 a to 20 d are arranged side by side in the length direction of the screen base 25 (screen 10 ′) on the screen base 25. However, the connection form between the solar cell modules 20a to 20d in the screen 10 ′ is different from that of the screen 10, and the screen 10 ′ has a pair of electric wires 28 (for extracting the output of each solar cell module 20). 28a ~
28d) is provided.

  The support unit 50 of the roll screen device 2 is provided with an output control unit 70 having a pair of main output terminals 51 and a rotary encoder 64 for detecting the rotation angle of the winding pipe 30.

  An 8-pole rotary connector 62 is provided in the winding pipe 30 of the roll screen device 2 instead of the switching mechanism 31 and the rotary connector 37. The eight input terminals of the rotary connector 62 are respectively connected to a total of eight wires of the wire pairs 28 a to 28 d, and each output terminal of the rotary connector 62 is connected to the output control unit 70.

  The output control unit 70 is a unit that synthesizes the outputs of the solar cell modules 20 and outputs them from a pair of main output terminals 51p and 51m.

  FIG. 8 shows a schematic configuration of the output control unit 70. In FIG. 8 and the following description, the input terminal 71xp (x = a to d) is connected to the + terminal of the solar cell module 20x through the wire pair 28x, the rotary connector 62, and the like. It is a terminal. Similarly, the input terminal 71xm is a terminal connected to the negative terminal of the solar cell module 20x through the electric wire pair 28x, the rotary connector 62, and the like.

  As illustrated, the output control unit 70 includes a switch 72 provided between each input terminal 71xp and the main output terminal 51p, and a switch 72 provided between each input terminal 71xm and the main output terminal 51m. . The output controller 70 is provided between the input terminal 71ap and the input terminal 71bm, the switch 72 provided between the input terminal 71bp and the input terminal 71cm, and the input terminal 71cp and the input terminal 71am. A switch 72 is provided.

  Further, the output control unit 70 includes a microcontroller 75, a mode setting switch 76, each unit of the output control unit 70, and a battery (not shown) that functions as a power source for the rotary encoder 64.

  The mode setting switch 76 included in the output control unit 70 is a dip switch for setting whether the operation mode of the output control unit 70 is a series connection mode or a parallel connection mode. Each switch 72 is a switch controlled by the microcontroller 75 for turning on / off the electrical connection between the terminals.

  Based on information from the rotary encoder 64 (rotation angle of the take-up pipe 30), the microcontroller 75 controls each switch 72 with ON / OFF control according to the operation mode (state of the mode setting switch 76). This is a unit to perform (so-called one-chip microcomputer).

  The microcontroller 75 is programmed to perform the following control.

  When the operation mode is the serial connection mode, the microcontroller 75 prevents the current from flowing into each solar cell module 20 that is all or part of which is wound around the winding pipe 30 and the other solar cells. Each switch 72 is controlled so that the sum of the output voltages of the module 20 is output from the main output terminals 51p and 51m.

Further, when the operation mode is the serial connection mode, the microcontroller 75 prevents the current from flowing into each solar cell module 20 that is all or partly wound around the winding pipe 30 and the other each. The sum of the output currents of the solar cell modules 20 is output from the main output terminals 51p and 51m (so that the outputs of the other solar cell modules 20 are input to the main output terminals 51p and 51m in parallel. ), Each switch 72 is controlled.

  As is clear from the above description, the roll screen device 2 according to the present embodiment also has a configuration in which no current flows through each solar cell module 20 that is not exposed to sunlight.

  Accordingly, the roll screen device 2 is also a device that can be used in a manner that does not cause the above-described problems caused by current flowing in each solar cell module that is not exposed to sunlight, as with the roll screen device 1. Will be.

<Deformation>
The roll screen devices 1 and 2 described above can be variously modified. For example, the roll screen device 2 is used as an output control unit 70 to mechanically turn on / off the connection between various terminals (a device that needs to be energized to operate, turn on / off the connection between various terminals) Can be transformed into a device having a unit that does not include Further, the roll screen device 2 can be transformed into a device that operates only in the parallel connection mode.

  The roll screen device 2 can be transformed into a device that does not include the output control unit 70 (a device that has a plurality of pairs of main output terminals and is used by being connected to a power conditioner or the like).

  Further, the roll screen devices 1 and 2 have a specific configuration (the number of the solar cell modules 20 disposed on the screen base material 25, the configuration of the switching mechanism 31 and the configuration of the output control unit 70). It is a matter of course that the apparatus may be modified into different devices.

DESCRIPTION OF SYMBOLS 1, 2 Roll screen apparatus 10, 10 'Screen 20 (20a, 20c, 20b, 20d) Solar cell module 11 Solar cell 12 Weatherproof protective film 13b, 13a Sealing material 14 Back sheet 15 Sealing material 16 Ultraviolet cut film 25 Screen base material 26 Terminal 28 Wire pair 30 Winding pipe 31 Switching mechanism 32, 71 Input terminal 33 Output terminal 34 Electrode plate 35 Fan-shaped electrode 36 Electrode 37, 62 Rotary connector 40 Support part 50 Output terminal part 51, 51p, 51m Main output Terminal 64 Rotary encoder 70 Output controller 72 Switch 75 Microcontroller 76 Mode setting switch

Claims (4)

A winding pipe;
A support portion for rotatably supporting the winding pipe;
A pair of main output terminals fixed to the support;
A screen having a plurality of solar cell modules disposed on one surface, one end of which is wound on the winding pipe so that the winding pipe can be unwound and unwound from the winding pipe. A screen coupled to the
A current is supplied to each solar cell module in which all or part of the plurality of solar cell modules are arranged in a non-exposed region of the screen that is a region wound around the winding pipe. An output means for combining the output of each of the other solar cell modules and outputting from the pair of main output terminals,
A roll screen device comprising: The output means includes
The roll screen device according to claim 1, wherein a sum of output voltages of the other solar cell modules is output from the pair of main output terminals. The output means includes
By electrically changing the electrical connection path between the pair of main output terminals and the output terminals of the plurality of solar cell modules according to the rotation angle of the winding pipe, all the parts in the non-exposed region Alternatively, a state in which no current flows is formed in each solar cell module in which some parts are arranged, and the outputs of the other solar cell modules are combined and output from the pair of main output terminals. The roll screen apparatus according to claim 1 or 2. A winding pipe;
A support portion for rotatably supporting the winding pipe;
A screen in which N (≧ 2) solar cell modules are arranged on one surface, and one end of the screen is capable of being wound around the winding pipe and unwinding from the winding pipe. A screen connected to the winding pipe;
N pairs of output extraction terminals fixed to the support portion, each of which is electrically connected to a pair of output terminals of different solar cell modules among the N solar cell modules. N pairs of output extraction terminals;
A roll screen device comprising:

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