Photovoltaic power generator

Abstract

To provide a photovoltaic power generator that can simply change a light collection / light-shielding condition or a power generation condition by light utilization or both of them.SOLUTION: A photovoltaic power generator has: a power generation part which generates power by receiving light; a first holding part which holds a first portion of the power generation part; and a second holding part which can hold a second portion of the power generation part, wherein the photovoltaic power generator can change a light collection / light-shielding condition or a power generation condition or both of them by cancelling holding of the second portion of the power generation part by the second holding part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a photovoltaic device. [Background technology]

[0002] Photovoltaic devices that generate electricity by receiving light are known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-97002 A Summary of the Invention [Problem to be solved by the invention]

[0004] It is desirable for the above-mentioned photovoltaic device to be able to easily change the light-gathering / shading conditions, the power generation conditions by utilizing light, or both.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a photovoltaic device that can easily change the light-gathering / light-blocking conditions, the power generation conditions by utilizing light, or both. [Means for solving the problem]

[0006] One aspect of the present invention is as follows.

[0007] [1] A power generation unit that receives light and generates electricity; a first holding portion that holds a first portion of the power generation portion; a second holding portion capable of holding a second portion of the power generating unit, A photovoltaic device in which the light-exposure / light-blocking conditions, the power generation conditions, or both can be changed by releasing the second portion of the power generation unit from the second holding unit.

[0008] [2] The photovoltaic device described in [1] can generate power in a second state different from the first state in which the second portion of the power generating unit is held by the second holding unit by releasing the holding of the second portion of the power generating unit by the second holding unit.

[0009] [3] The photovoltaic device according to [1] or [2], which is capable of generating electricity in a first state in which the second portion of the power generating unit is held by the second holding unit.

[0010] [4] The photovoltaic device according to any one of [1] to [3], wherein a second state in which the second holding part releases the holding of the second part of the power generation unit is a state in which the first holding part suspends the power generation unit.

[0011] [5] The photovoltaic device described in any one of [1] to [4], wherein a position of the second portion of the power generating unit 2 in a first state in which the second portion of the power generating unit is held by the second holding portion and a position of the second portion of the power generating unit 2 in a second state in which the second portion of the power generating unit is released from the second holding portion differ in the vertical direction or horizontal direction.

[0012] [6] The photovoltaic device described in any one of [1] to [5], wherein the power generating unit swings from a first state in which the second portion of the power generating unit is held by the second holding portion to a second state different from the first state in which the second portion of the power generating unit is held by the second holding portion by releasing the second holding portion from holding the second portion of the power generating unit.

[0013] [7] The photovoltaic device according to any one of [1] to [6], wherein the second holding portion is located below the first holding portion.

[0014] [8] The photovoltaic device according to any one of [1] to [7], wherein the second portion of the power generating section has a weight member.

[0015] [9] The photovoltaic device according to any one of [1] to [8], wherein the power generating section has light transmitting properties.

[0016]

[10] The photovoltaic device according to any one of [1] to [9], wherein the power generating section has flexibility.

[0017]

[11] The photovoltaic device according to any one of [1] to

[10] , wherein the power generating section is an organic thin-film solar cell.

[0018]

[12] the first portion of the power generating unit has a first rod-shaped member, The second portion of the power generating unit has a second rod-shaped member. The photovoltaic device according to any one of [1] to

[11] .

[0019]

[13] the second holding portion of the photovoltaic device is formed of a tension member, The photovoltaic device described in

[12] , wherein the power generating unit moves from the second state in which the second holding portion releases the second portion of the power generating unit to the first state in which the second portion of the power generating unit is held by the second holding portion by pulling the tension member.

[0020]

[14] The photovoltaic device described in

[13] , wherein the second holding portion of the photovoltaic device is composed of the tension member, a guide portion that guides the tension member, and a drive portion that moves the tension member.

[0021]

[15]

[13] or

[14] , and

[13] or

[14] , and the second photovoltaic device according to the present invention; a tension member that is bridged between the second rod-shaped member of the first photovoltaic device and the second rod-shaped member of the second photovoltaic device;

[0022]

[16]

[12] A first photovoltaic device according to the present invention;

[12] and the second photovoltaic device according to

[12] , the first rod-shaped member of the first photovoltaic device and the first rod-shaped member of the second photovoltaic device are connected to each other, A photovoltaic system in which the second rod-shaped member of the first photovoltaic device and the second rod-shaped member of the second photovoltaic device are connected to each other.

[0023]

[17]

[12] A first photovoltaic device according to the present invention;

[12] and the second photovoltaic device according to

[12] , the first rod-shaped member of the first photovoltaic device and the first rod-shaped member of the second photovoltaic device are connected to each other, A photovoltaic system in which the second rod-shaped member of the first photovoltaic device and the second rod-shaped member of the second photovoltaic device are separated from each other.

[0024]

[18]

[12] A first photovoltaic device according to the present invention;

[12] and the second photovoltaic device according to

[12] , the first rod-shaped member of the first photovoltaic device and the first rod-shaped member of the second photovoltaic device are separated from each other, A photovoltaic system in which the second rod-shaped member of the first photovoltaic device and the second rod-shaped member of the second photovoltaic device are connected to each other.

[0025]

[19] A photovoltaic device according to any one of [1] to

[14] or a photovoltaic system according to any one of

[15] to

[18] ; and an agricultural house, The agricultural photovoltaic system, wherein the agricultural greenhouse has the first holding portion.

[0026]

[20] The agricultural house has a roof, An agricultural photovoltaic system as described in

[19] , wherein the roof has the first holding portion for a given one of the photovoltaic devices and the second holding portion for the given one of the photovoltaic devices. Effect of the Invention

[0027] According to the present invention, it is possible to provide a photovoltaic device that can easily change the light-gathering / light-blocking conditions, the power generation conditions by utilizing light, or both. [Brief description of the drawings]

[0028] [Figure 1] 1 is a cross-sectional view showing an agricultural photovoltaic system having a photovoltaic power generation device according to one embodiment of the present invention. [Diagram 2] 2 is an external view partially showing the agricultural photovoltaic power generation system shown in FIG. 1 as viewed from the direction of arrow A. [Diagram 3] 3 is an external view showing another example of the agricultural photovoltaic power generation system shown in FIG. 2. FIG. [Figure 4] 3 is an external view showing another example of the agricultural photovoltaic power generation system shown in FIG. 2. FIG. [Diagram 5] 1. FIG. 4 is a cross-sectional view showing another example of the agricultural photovoltaic power generation system shown in FIG. [Figure 6] 1. FIG. 4 is a cross-sectional view showing another example of the agricultural photovoltaic power generation system shown in FIG. [Figure 7] 7 is an external view partially showing the agricultural photovoltaic power generation system shown in FIG. 6 as seen from the direction of arrow A. [Figure 8] 1. FIG. 4 is a cross-sectional view showing another example of the agricultural photovoltaic power generation system shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0030] As shown in Figures 1 and 2, in one embodiment of the present invention, a photovoltaic device 1 has a power generation section 2 that receives light and generates electricity, a first holding section 3 that holds a first portion 2a of the power generation section 2, and a second holding section 4 that can hold a second portion 2b of the power generation section 2, and by releasing the holding of the second portion 2b of the power generation section 2 by the second holding section 4, it is possible to change the light exposure / shading conditions, the power generation conditions, or both.

[0031] According to the above configuration, the light-gathering / shading conditions, the power generation conditions by light utilization, or both can be changed by a simple operation of holding or releasing the second part 2b of the power generation unit 2 by the second holding unit 4. Therefore, according to the above configuration, it is possible to realize a photovoltaic power generation device 1 in which the light-gathering / shading conditions, the power generation conditions by light utilization, or both can be easily changed according to the light demand, etc., taking into account the balance of coexistence with other life activities and social activities. The first holding unit 3 can be configured to hold the first part 2a of the power generation unit 2 by, for example, hanging. For example, the first holding unit 3 can be configured with a hook (not shown) on which the first part 2a of the power generation unit 2 can be hung. The first holding unit 3 may be configured to hold the first part 2a of the power generation unit 2 by a method other than hanging, and may be configured to hold the first part 2a of the power generation unit 2 by, for example, fixing. The second holding unit 4 can be configured to hold the second part 2b of the power generation unit 2 by, for example, hanging. For example, the second holding unit 4 can be configured with a hook (not shown) on which the second part 2b of the power generation unit 2 can be hung. The second holding part 4 may be configured to hold the second part 2b of the power generation part 2 by a method other than hooking, and may be configured, for example, by a tension member 9 such as a wire, rope, chain, belt or the like capable of supporting the second part 2b of the power generation part 2 (see, for example, Figure 8).

[0032] The photovoltaic device 1 can generate power in a second state (in this embodiment, a state shown by a two-dot chain line in FIG. 1) different from a first state (in this embodiment, a state shown by a solid line in FIG. 1) in which the second portion 2b of the power generating unit 2 is held by the second holding unit 4, by releasing the holding of the second portion 2b of the power generating unit 2 by the second holding unit 4. According to the above configuration, the power generation conditions can be changed by the simple operation of releasing the holding of the second portion 2b of the power generating unit 2 by the second holding unit 4.

[0033] The photovoltaic device 1 can generate power in the first state in which the second portion 2b of the power generation unit 2 is held by the second holding unit 4. According to the above configuration, the power generation conditions can be changed by the simple operation of having the second holding unit 4 hold the second portion 2b of the power generation unit 2.

[0034] The photovoltaic device 1 has a third holding part 6 capable of holding the second portion 2b of the power generation unit 2 of the photovoltaic device 1 in addition to the second holding part 4, and can be put into a third state (in this embodiment, a state shown by a dashed line in FIG. 1) in which the second portion 2b of the power generation unit 2 is held by the third holding part 6. The power generation unit 2 may be configured to be capable of generating power in the third state, or may be configured not to be capable of generating power in the third state.

[0035] The second state of the photovoltaic device 1 is a state in which the power generation unit 2 is suspended by the first holding unit 3, as shown by the two-dot chain line in Fig. 1. According to the above configuration, by releasing the second portion 2b of the power generation unit 2 from the second holding unit 4, the second portion 2b of the power generation unit 2 can be moved by its own weight, so that the second state can be easily achieved. Furthermore, when the device is configured to generate power in the second state, power can be generated in a suspended vertical state.

[0036] The position of the second portion 2b of the power generating unit 2 in the first state in which the second portion 2b of the power generating unit 2 is held by the second holding unit 4 differs in the vertical or horizontal direction from the position of the second portion 2b of the power generating unit 2 in the second state in which the second portion 2b of the power generating unit 2 is released from the second holding unit 4. With the above configuration, the angle or effective area of ​​the power generating unit 2 relative to light such as sunlight or artificial light from a lighting device installed below the power generating unit 2 can be efficiently changed, making it possible to efficiently change the lighting / shading conditions or the power generation conditions, or both.

[0037] The photovoltaic device 1 swings from a first state in which the second portion 2b of the power generation unit 2 is held by the second holding part 4 to a second state different from the first state in which the second portion 2b of the power generation unit 2 is held by the second holding part 4, by releasing the second holding part 4 from holding the second portion 2b of the power generation unit 2. With the above configuration, the position, attitude, and angle of the power generation unit 2 can be changed efficiently, so that the light-gathering / light-blocking conditions, the power generation conditions, or both can be changed efficiently.

[0038] The photovoltaic device 1 may be configured such that the first state is a state in which the first holding unit 3 suspends the power generating unit 2. With this configuration, a stable suspended state by the second holding unit 4 can be realized. In addition, by configuring the second state as a state in which the first holding unit 3 suspends the power generating unit 2 (i.e., a blind type), for example, as shown in FIG. 5, by releasing the holding of the second part 2b of the power generating unit 2 by the second holding unit 4, the second part 2b of the power generating unit 2 can be easily moved by its own weight until it reaches the second state (see the two-dot chain line in FIG. 5). Alternatively, for example, by configuring the power generating unit 2 as a winding type in which the power generating unit 2 is wound up by a biasing force such as a spring force installed in advance, by releasing the holding of the second part 2b of the power generating unit 2 by the second holding unit 4, the second part 2b of the power generating unit 2 can be easily moved upward by the biasing force until it reaches the second state.

[0039] In the photovoltaic device 1, the second holding part 4 is located below the first holding part 3. According to the above configuration, when moving the second part 2b of the power generation unit 2 between the first state and the second state, support by the first holding part 3 located above the second holding part 4 can be utilized, making the movement operation easy.

[0040] In the photovoltaic device 1, the second portion 2b of the power generating unit 2 has a weight member. This configuration makes it easier to stabilize the posture of the second state in which the holding by the second holding part 4 is released. In this embodiment, the weight member is made of a second rod-shaped member 2b1, which will be described later.

[0041] The photovoltaic device 1 may be configured so that the power generation unit 2 is translucent. This configuration makes it possible to effectively utilize the light transmitted through the power generation unit 2. In particular, when used in an agricultural greenhouse 5 described below, the transmitted light can be used for cultivation.

[0042] The photovoltaic device 1 may be configured so that the power generating unit 2 has flexibility. With this configuration, the power generating unit 2 can easily move between the first state and the second state by utilizing the flexibility.

[0043] The photovoltaic device 1 may be configured so that the power generation section 2 can generate power on both sides. With this configuration, the power generation efficiency can be improved.

[0044] In the photovoltaic device 1, the power generation unit 2 is an organic thin-film solar cell. According to the above configuration, the power generation unit 2 can easily move between the first state and the second state by utilizing the thin, light, and flexible nature of the organic thin-film solar cell. In addition, due to its lightness, it can be suspended with a simple structure. In addition, due to the translucency of the organic thin-film solar cell, the light transmitted through the power generation unit 2 can be effectively utilized. Furthermore, due to the nature of the organic thin-film solar cell that can generate power on both sides, the power generation efficiency can be improved. Note that the power generation unit 2 is not limited to an organic thin-film solar cell, and may be, for example, a solar cell of a single crystal silicon type, a polycrystalline silicon type, a microcrystalline silicon type, an amorphous silicon type, a thin-film silicon type, a hybrid type, a compound system using GaAs (gallium arsenide) (including multi-junction), CIS (copper, indium, selenium), CIGS (copper, indium, gallium, selenium), CdTe (cadmium telluride), etc., a dye-sensitized type, a perovskite type, a tandem type that combines these, or the like.

[0045] The photovoltaic device 1 can be electrically moved between the first state and the second state. According to the above configuration, the efficiency of the operation of moving the power generation unit 2 between the first state and the second state can be improved.

[0046] In the photovoltaic device 1, the second portion 2b of the power generation unit 2 can be electrically held or released by the second holding unit 4. With the above configuration, the operation of holding or releasing the second portion 2b of the power generation unit 2 can be made more efficient.

[0047] When electrifying the vehicle, programming can be implemented to operate according to timer settings or instructions from light detection sensors, as necessary. In addition, autonomous control programming using AI can be implemented.

[0048] In the photovoltaic device 1, the first rod-shaped member 2a1 of the power generation unit 2 has a hollow structure through which the wiring of the power generation unit 2 passes. According to the above configuration, the wiring for extracting the power generated by the power generation unit 2 can be arranged through the inside of the first rod-shaped member 2a1 held by the first holding unit 3, thereby realizing space-efficient wiring that does not get in the way when the power generation unit 2 is moved between the first state and the second state.

[0049] 2, in the photovoltaic device 1, the first portion 2a of the power generating unit 2 has a first rod-shaped member 2a1, and the second portion 2b of the power generating unit 2 has a second rod-shaped member 2b1. With the above configuration, the first rod-shaped member 2a1 and the second rod-shaped member 2b1 act as supports to stably maintain the shape of the power generating unit 2.

[0050] As shown in FIG. 2, the photovoltaic power generation system 7 has a first photovoltaic power generation device 1 and a second photovoltaic power generation device 1, and the first rod-shaped member 2a1 of the first photovoltaic power generation device 1 and the first rod-shaped member 2a1 of the second photovoltaic power generation device 1 are connected to each other, and the second rod-shaped member 2b1 of the first photovoltaic power generation device 1 and the second rod-shaped member 2b1 of the second photovoltaic power generation device 1 are connected to each other. According to the above configuration, a wide light receiving area can be formed by using a plurality of power generation units 2 as necessary. In addition, the first rod-shaped member 2a1 can support the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1 together. In addition, the second rod-shaped member 2b1 can move the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1 together between the first state and the second state. Therefore, a photovoltaic power generation system 7 with a wide light receiving area and good usability can be realized with a simple structure. In the example shown in Fig. 7, the photovoltaic power generation system 7 has a first photovoltaic power generation device 1 and a second photovoltaic power generation device 1, and the first rod-shaped member 2a1 of the first photovoltaic power generation device 1 and the first rod-shaped member 2a1 of the second photovoltaic power generation device 1 are connected to each other, and the second rod-shaped member 2b1 of the first photovoltaic power generation device 1 and the second rod-shaped member 2b1 of the second photovoltaic power generation device 1 are connected to each other. More specifically, in the example shown in Fig. 7, in addition to the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1, a third photovoltaic power generation device 1 is included, and the first rod-shaped member 2a1 of the first photovoltaic power generation device 1, the first rod-shaped member 2a1 of the second photovoltaic power generation device 1 and the first rod-shaped member 2a1 of the third photovoltaic power generation device 1 are connected to each other, and the second rod-shaped member 2b1 of the first photovoltaic power generation device 1, the second rod-shaped member 2b1 of the second photovoltaic power generation device 1 and the second rod-shaped member 2b1 of the third photovoltaic power generation device 1 are connected to each other, and the photovoltaic power generation system 7 has a configuration in which multiple sets of such configurations are included. The photovoltaic power generation system 7 is not limited to the 3-connected configuration as shown in FIG. 7 and may have any number of connections, may have a configuration having multiple sets of such configurations with any number of connections, or may have any combination of the group consisting of a 1-connected configuration, a 2-connected configuration, a 3-connected configuration, ..., and an n-connected configuration (where n is any natural number).

[0051] As shown in FIG. 3, the photovoltaic power generation system 7 may have a first photovoltaic power generation device 1 and a second photovoltaic power generation device 1, and the first rod-shaped member 2a1 of the first photovoltaic power generation device 1 and the first rod-shaped member 2a1 of the second photovoltaic power generation device 1 may be connected to each other, and the second rod-shaped member 2b1 of the first photovoltaic power generation device 1 and the second rod-shaped member 2b1 of the second photovoltaic power generation device 1 may be separated from each other. According to the above configuration, the first rod-shaped member 2a1 can support the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1 together. Furthermore, the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1 can generate power under different power generation conditions, as necessary. The relative positions of the second rod-shaped member 2b1 of the first photovoltaic power generation device 1 and the second rod-shaped member 2b1 of the second photovoltaic power generation device 1 may be the same or different in the vertical direction, the horizontal direction perpendicular to the second rod-shaped member 2b1, or both in the first state, the second state, or both.

[0052] 4, the photovoltaic power generation system 7 may have a first photovoltaic power generation device 1 and a second photovoltaic power generation device 1, and may be configured such that the first rod-shaped member 2a1 of the first photovoltaic power generation device 1 and the first rod-shaped member 2a1 of the second photovoltaic power generation device 1 are separated from each other, and the second rod-shaped member 2b1 of the first photovoltaic power generation device 1 and the second rod-shaped member 2b1 of the second photovoltaic power generation device 1 are connected to each other. According to the above configuration, the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1 can be moved together between the first state and the second state by the second rod-shaped member 2b1.

[0053] For example, as shown in FIG. 6, the photovoltaic power generation system 7 may have a first photovoltaic power generation device 1 and a second photovoltaic power generation device 1, and the first rod-shaped member 2a1 of the first photovoltaic power generation device 1 and the first rod-shaped member 2a1 of the second photovoltaic power generation device 1 may be separated from each other, and the second rod-shaped member 2b1 of the first photovoltaic power generation device 1 and the second rod-shaped member 2b1 of the second photovoltaic power generation device 1 may be separated from each other. According to the above configuration, a wide light receiving area can be formed by using a plurality of power generation units 2 as needed. Also, the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1 can generate power under different power generation conditions as needed. Also, the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1 can be separately arranged in appropriate positions according to the purpose. Therefore, a photovoltaic power generation system 7 that is easy to generate power under different power generation conditions with a wide light receiving area can be realized. 6, in addition to the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1, a third photovoltaic power generation device 1 is provided, and the first rod-shaped member 2a1 of the first photovoltaic power generation device 1, the first rod-shaped member 2a1 of the second photovoltaic power generation device 1, and the first rod-shaped member 2a1 of the third photovoltaic power generation device 1 are separated from each other, and the second rod-shaped member 2b1 of the first photovoltaic power generation device 1, the second rod-shaped member 2b1 of the second photovoltaic power generation device 1, and the second rod-shaped member 2b1 of the third photovoltaic power generation device 1 are separated from each other. The relative positions of the first rod-shaped member 2a1 of the first photovoltaic power generation device 1 and the first rod-shaped member 2a1 of the second photovoltaic power generation device 1 may be the same or different in the vertical direction, the horizontal direction perpendicular to the second rod-shaped member 2b1, or both. The relative positions of the second rod-shaped member 2b1 of the first photovoltaic device 1 and the second rod-shaped member 2b1 of the second photovoltaic device 1 may be the same or different in the vertical direction, the horizontal direction perpendicular to the second rod-shaped member 2b1, or both, in the first state, the second state, the third state, or any multiple states.

[0054] The photovoltaic power generation device 1 may be configured to use the tension member 9 as described above, for example, as shown in the example in Fig. 8. In this example, the second holding part 4 of the photovoltaic power generation device 1 is configured with the tension member 9, and the power generation unit 2 moves from a second state in which the second holding part 4 releases the second portion 2b of the power generation unit 2 to a first state in which the second holding part 4 holds the second portion 2b of the power generation unit 2. By pulling the tension member 9 and then releasing the pulling, the power generation unit can be easily moved between the first state and the second state.

[0055] Furthermore, in this example, the second holding unit 4 of the photovoltaic device 1 is composed of a tension member 9, a guide unit 10 that guides the tension member 9, and a drive unit 11 that moves the tension member 9. According to the above configuration, the tension member 9, the guide unit 10, and the drive unit 11 can more easily move the power generation unit between the first state and the second state.

[0056] In this example, the photovoltaic system 7 has a first photovoltaic power generation device 1 and a second photovoltaic power generation device 1, and the tension member 9 is stretched between the second rod-shaped member 2b1 of the first photovoltaic power generation device 1 and the second rod-shaped member 2b1 of the second photovoltaic power generation device 1. According to the above configuration, the tension member 9 can move the first photovoltaic power generation device 1 and the second photovoltaic power generation device 1 together between the first state and the second state. In the example shown in FIG. 8, the photovoltaic system 7 has three or more photovoltaic power generation devices 1, and the tension member 9 is stretched across the second rod-shaped members 2b1 of all the photovoltaic power generation devices 1.

[0057] Although not shown in the figure, the photovoltaic power generation device 1 may have a third holding part 6 in addition to the second holding part 4 composed of the above-mentioned tensile member 9, and the third holding part 6 is composed of the tensile member 9, and the power generation unit 2 may be configured to move from a second state in which the second part 2b of the power generation unit 2 is released from the holding of the second part 2b of the power generation unit 2 by the second holding part 4, to a third state in which the second part 2b of the power generation unit 2 is held by the third holding part 6, by pulling the tensile member 9.

[0058] As shown in Figs. 1 and 2, the agricultural photovoltaic system 8 includes a photovoltaic system 7 and an agricultural house 5, and the agricultural house 5 includes a first holding unit 3. According to the above configuration, the agricultural photovoltaic system 8 can be realized, which can easily change the power generation conditions according to the sunlight conditions suitable for growing agricultural crops in the agricultural house 5 (not only direct sunlight, but also reflected light by the ground, plants, or covering films, and artificial light used for the purpose of accelerating the photosynthetic effect and delaying the harvest time of short-day plants, etc.). In particular, between the first state and the second state, a daylighting effect can be obtained by moving the power generation unit 2 in a direction that does not block light, and a shading effect can be obtained by moving the power generation unit 2 in a direction that blocks light. The agricultural photovoltaic system 8 is not limited to a configuration including a photovoltaic system 7 and an agricultural house 5, and the agricultural house 5 includes a first holding unit 3, but may also include a photovoltaic device 1 and an agricultural house 5, and the agricultural house 5 includes a first holding unit 3.

[0059] In particular, in the second state in which the agricultural house 5 is suspended by its own weight, the power generating unit 2 in the agricultural house 5 reflects or absorbs the light entering from the outside (mainly sunlight), thereby effectively maintaining the room temperature in the agricultural house 5 at a high level. This can be said to mean that the power generating unit 2 installed in the agricultural house 5 also has the effect of trapping more light energy from the outside in the agricultural house 5. Compared to a case in which the power generating unit 2 is not present, it is expected to have the effect of trapping light energy in the agricultural house 5 that would otherwise pass from the outside of the agricultural house 5 through the agricultural house 5 and then escape outside the agricultural house 5. The light reflected by the power generating unit 2 reaches the crops, the ground, the covering film, etc., and is repeatedly reflected, absorbed, or transmitted. Most of the light energy absorbed by the power generating unit 2, other than that converted into electrical energy, is converted into thermal energy, and the light energy absorbed in the crops, the ground, the covering film, etc. is also converted into some kind of energy, including thermal energy. This will be helpful for agricultural activities that wish to raise the room temperature inside the agricultural greenhouse 5 in winter, and considering the current state of horticulture agriculture, where heating using fossil fuels is still widely used to raise room temperature, it is thought that this will also be an aid toward realizing a low-carbon society. On the other hand, if a rise in temperature inside the agricultural greenhouse 5 in summer or the like is undesirable, it is preferable to keep the power generation unit 2 in a position as close to the outside of the agricultural greenhouse 5 as possible, as in the first state, but it is more effective to provide a thermal insulation effect by temporarily removing the power generation unit 2 and placing it so as to cover the outside of the agricultural greenhouse 5, which is a more preferable state for suppressing a rise in room temperature inside the agricultural greenhouse 5.

[0060] In the agricultural photovoltaic system 8, the agricultural house 5 has a roof 5a, and the roof 5a has a first holding part 3 of a predetermined photovoltaic device 1 and a second holding part 4 of the predetermined photovoltaic device 1. According to the above configuration, it is possible to efficiently change the light-gathering / shading conditions or the power generation conditions, or both. The agricultural photovoltaic system 8 is not limited to a configuration in which the first holding part 3 is provided on the roof 5a of the agricultural house 5, and may be configured, for example, to be provided on a part of the agricultural house 5 other than the roof 5a. The agricultural photovoltaic system 8 is not limited to a configuration in which the agricultural house 5 has the first holding part 3, and may be configured, for example, with a support member such as a pillar installed inside or outside the agricultural house 5, or both. The agricultural photovoltaic system 8 is not limited to a configuration in which the second holding part 4 is provided on the roof 5a of the agricultural house 5, and may be configured, for example, to be provided on a part of the agricultural house 5 other than the roof 5a. The agricultural photovoltaic system 8 is not limited to a configuration in which the second holding part 4 is provided in the agricultural house 5, but may be configured, for example, with the above-mentioned tension member 9 (see Figure 8) or a support member such as a pillar installed inside the agricultural house 5, outside the agricultural house 5, or both.

[0061] In the agricultural photovoltaic system 8, the roof 5a of the agricultural greenhouse 5 has a first slope 5a1, the first slope 5a1 has a first holding part 3 of a predetermined photovoltaic device 1 and a second holding part 4 of the predetermined photovoltaic device 1, the second holding part 4 of the predetermined photovoltaic device 1 is located below the first holding part 3 of the predetermined photovoltaic device 1, and the power generation part 2 is arranged along the first slope 5a1 in the first state. With the above configuration, stable power generation in the first state can be realized.

[0062] In the agricultural photovoltaic system 8, the roof 5a of the agricultural house 5 has a first slope 5a1 and a second slope 5a2, the first slope 5a1 and the second slope 5a2 intersect to form a ridge 5a3, a first holding portion 3 of a specified photovoltaic device 1 is arranged along the ridge 5a3, the first slope 5a1 has a second holding portion 4 of the specified photovoltaic device 1, and the second slope 5a2 has a third holding portion 5a1 of the specified photovoltaic device 1 that can hold a second portion 2b of a power generation unit 2 of the specified photovoltaic device 1. The photovoltaic power generating device 1 has a first holding part 4 and a third holding part 6, and can generate power in a first state in which the second portion 2b of the power generating part 2 is held by the second holding part 4, and can generate power in a third state (see dashed line in FIG. 1 ) in which the second portion 2b of the power generating part 2 is held by the third holding part 6, and can generate power in a second state different from the first state and the third state even when the holding of the second portion 2b of the power generating part 2 by the second holding part 4 is released or when the holding of the second portion 2b of the power generating part 2 by the third holding part 6 is released. With the above configuration, the state can be changed among the first state, the second state, and the third state according to the sunlight conditions suitable for growing agricultural crops in the agricultural greenhouse 5, and the lighting / shading conditions or the power generating conditions, or both, can be easily changed.

[0063] In an agricultural photovoltaic system 8 in which the roof 5a of an agricultural greenhouse 5 has a first slope 5a1 and a second slope 5a2, the photovoltaic device 1 is arranged such that the power generation unit 2 is aligned along the first slope 5a1 in the first state, and is arranged such that the power generation unit 2 is aligned along the second slope 5a2 in the third state. With the above configuration, stable power generation can be achieved in both the first and third states.

[0064] 3, the agricultural photovoltaic system 8 may be configured such that the photovoltaic system 7 has a first photovoltaic device 1 and a second photovoltaic device 1, the first rod-shaped member 2a1 of the first photovoltaic device 1 and the first rod-shaped member 2a1 of the second photovoltaic device 1 are connected to each other, and the second rod-shaped member 2b1 of the first photovoltaic device 1 and the second rod-shaped member 2b1 of the second photovoltaic device 1 are separated from each other. According to the above configuration, by putting the multiple photovoltaic devices 1 into different states (for example, putting one into a first state and the other into a third state, etc.), it is possible to easily change the lighting / shading conditions or the power generation conditions, or both, according to the sunlight conditions suitable for the cultivation of agricultural crops in different areas of the agricultural greenhouse 5.

[0065] 6, the agricultural photovoltaic system 8 may be configured such that the photovoltaic system 7 has a first photovoltaic device 1 and a second photovoltaic device 1, the first rod-shaped member 2a1 of the first photovoltaic device 1 and the first rod-shaped member 2a1 of the second photovoltaic device 1 are separated from each other, and the second rod-shaped member 2b1 of the first photovoltaic device 1 and the second rod-shaped member 2b1 of the second photovoltaic device 1 are separated from each other. In this case, the first rod-shaped member 2a1 of the first photovoltaic device 1 and the first rod-shaped member 2a1 of the second photovoltaic device 1 may be arranged with a shift in position in the vertical direction, horizontal direction, or both, as necessary.

[0066] In order to realize the carbon-neutral society we should aim for, it is necessary to be strongly aware of not only the amount of carbon dioxide emitted during the use of industrial products, but also the amount of carbon dioxide emitted during production and disposal. In the various disclosures mentioned above, organic thin-film solar cells, which are expected to maximize the effect of reducing the environmental load, are made of many materials that have a low environmental load, and they consume little energy during production and disposal, so they are expected to be highly effective in reducing carbon dioxide emissions. Furthermore, it is recommended that biomass-derived materials such as abandoned bamboo forests be processed and used for the first rod-shaped member 2a1 and the second rod-shaped member 2b1 of the power generation unit 2 to contribute to decarbonization of society as a whole. The above disclosures focus on how to increase the amount of renewable energy introduced in human social activities and life activities, including agriculture, but are derived from the perspective that in order to actually get many people to use them, the product must be inexpensive, reasonable, and easy to use, both in terms of introduction and running costs. Specifically speaking in the agricultural field, from the perspective of food security, it is desirable to have a system that is based on agriculture rather than a system that is based on power generation. In agriculture, it is necessary to control the environment for living organisms, but because they are living organisms, the optimal conditions are derived from an extremely diverse range of factors. We do not deny the possibility of controlling these with more advanced automatic control or digital technology, but from the user's perspective, there is great value in analog control that uses something that is easier to install and change settings. The above disclosure was conceived in pursuit of that value, and we hope that the value provided by the above disclosure will bring innovation to agricultural power generation and be a big step towards achieving carbon neutrality.

[0067] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0068] 1 Photovoltaic device 2. Power Generation Division 2a Part 1 2a1 First rod-shaped member 2b 2nd part 2b1 Second rod-shaped member 3 1st holding part 4 Second holding part 5. Agricultural greenhouses 5a Roof 5a1 First Slope 5a2 2nd slope Building 5a3 6 Third holding part 7 Photovoltaic Systems 8. Agricultural photovoltaic system 9 Tensile members 10 Information Department 11 Drive unit

Claims

1. A power generation unit that generates electricity when it receives light, A first holding part that holds the first portion of the power generation unit, It has a second holding part that can hold the second portion of the power generation unit, By releasing the second holding part from the second portion of the power generation unit, the daylighting / shading conditions, the power generation conditions, or both can be changed. The power generation unit moves by swing from a first state in which the second portion of the power generation unit is held by the second holding portion, to a second state different from the first state in which the second portion of the power generation unit is held by the second holding portion, by releasing the second holding portion from the second holding portion of the power generation unit. The second holding portion is composed of a tension member, A photovoltaic power generation device wherein the power generation unit moves from a second state in which the second portion of the power generation unit is released from being held by the second holding portion, to a first state in which the second portion of the power generation unit is held by the second holding portion, by pulling the tension member.

2. The photovoltaic power generation device according to claim 1, wherein by releasing the second holding portion of the power generation portion from the second holding portion, power can be generated in a second state different from the first state in which the second holding portion of the power generation portion is held by the second holding portion.

3. The photovoltaic power generation device according to claim 1, wherein power can be generated in a first state in which the second portion of the power generation unit is held by the second holding portion.

4. The photovoltaic power generation device according to claim 1, wherein the second state in which the second holding part releases the holding of the second portion of the power generation unit is a state in which the first holding part suspends the power generation unit.

5. The photovoltaic power generation device according to claim 1, wherein the position of the second part of the power generation unit 2 in a first state in which the second part of the power generation unit is held by the second holding part and the position of the second part of the power generation unit 2 in a second state in which the holding part of the second part of the power generation unit is released are different in the vertical or horizontal direction.

6. The photovoltaic power generation device according to claim 1, wherein the second holding portion is located below the first holding portion.

7. The photoelectric power generation device according to claim 1, wherein the second portion of the power generation unit has a weight member.

8. The photovoltaic power generation device according to claim 1, wherein the power generation unit is translucent.

9. The photovoltaic power generation device according to claim 1, wherein the power generation unit is flexible.

10. The photovoltaic power generation apparatus according to claim 1, wherein the power generation unit is an organic thin-film solar cell.

11. The first portion of the power generation unit has a first rod-shaped member, The second portion of the power generation unit has a second rod-shaped member. The photovoltaic power generation device according to claim 1.

12. The photovoltaic power generation device according to claim 1, wherein the second holding portion of the photovoltaic power generation device comprises the tension member, a guide portion for guiding the tension member, and a drive portion for moving the tension member.

13. The first photovoltaic power generation device according to claim 11, The second photovoltaic power generation device according to claim 11, The tension member is spanned between the second rod-shaped member of the first photovoltaic power generation device and the second rod-shaped member of the second photovoltaic power generation device, in a photovoltaic power generation system.

14. The first photovoltaic power generation device according to claim 11, The second photovoltaic power generation device according to claim 11, The first rod-shaped member of the first photovoltaic power generation device and the first rod-shaped member of the second photovoltaic power generation device are connected to each other. A photovoltaic power generation system in which the second rod-shaped member of the first photovoltaic power generation device and the second rod-shaped member of the second photovoltaic power generation device are connected to each other.

15. The first photovoltaic power generation device according to claim 11, The second photovoltaic power generation device according to claim 11, The first rod-shaped member of the first photovoltaic power generation device and the first rod-shaped member of the second photovoltaic power generation device are connected to each other. A photovoltaic power generation system in which the second rod-shaped member of the first photovoltaic power generation device and the second rod-shaped member of the second photovoltaic power generation device are separated from each other.

16. The first photovoltaic power generation device according to claim 11, The second photovoltaic power generation device according to claim 11, The first rod-shaped member of the first photovoltaic power generation device and the first rod-shaped member of the second photovoltaic power generation device are separated from each other. A photovoltaic power generation system in which the second rod-shaped member of the first photovoltaic power generation device and the second rod-shaped member of the second photovoltaic power generation device are connected to each other.

17. A photovoltaic device according to claim 1 or a photovoltaic system according to claim 13, It has an agricultural greenhouse, The aforementioned agricultural greenhouse is an agricultural photovoltaic power generation system having the first holding part.

18. The aforementioned agricultural greenhouse has a roof, The agricultural photovoltaic power generation system according to claim 17, wherein the roof has a first holding portion of a predetermined photovoltaic power generation device and a second holding portion of the predetermined photovoltaic power generation device.

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