Curtain wall

Abstract

To reduce the radiation of a sunlight to a window panel and efficiently generate electric power from the sunlight on an outdoor side of the window panel of a curtain wall.SOLUTION: A curtain wall 1 comprises: a second panel 5B which is a window panel; and a fin 21 which is disposed on the outdoor side of the second panel 5B and shields a sunlight. The fin 21 has a solar battery panel 23 provided on a receiving surface part 22 for receiving the sunlight.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a curtain wall that reduces sunlight irradiation.

Background Art

[0002] In a curtain wall, sunlight irradiates the window panel and penetrates the window panel indoors. Therefore, measures against indoor solar radiation may be required. Conventionally, a solar cell blind having a plurality of slats provided with solar cells and disposed on the indoor side of the glass panel of the curtain wall is known (see Patent Document 1).

[0003] In the conventional solar cell blind described in Patent Document 1, sunlight is blocked by a plurality of slats aligned in the closed position. In addition, while dealing with indoor solar radiation by a plurality of slats, power generation is also possible by the solar cells of each slat. However, in the conventional solar cell blind, although sunlight irradiation can be reduced, since a plurality of slats are disposed on the indoor side with respect to the glass panel, there may be a dead space in the indoor space of the building, and there is also a concern that a person may collide with the slat provided with the solar cell. In addition, there is also a possibility that the power generation efficiency of the solar cell is affected by sunlight transmitted through various glass panels (for example, Low-E double glazing panels).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made in view of the above-described conventional problems, and an object thereof is to efficiently generate electricity using sunlight while reducing the irradiation of sunlight on a window panel on the outdoor side of a curtain wall.

Means for Solving the Problems

[0006] The present invention is a curtain wall including a window panel, comprising fins that are arranged at a position outside the window panel and block sunlight, wherein the fins have solar cell panels provided on a light-receiving surface for receiving sunlight.

Effects of the Invention

[0007] According to the present invention, it is possible to efficiently generate electricity using sunlight while reducing the irradiation of sunlight on the window panel on the outdoor side of the curtain wall.

Brief Description of the Drawings

[0008]

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MODE FOR CARRYING OUT THE INVENTION

[0009] An embodiment of the curtain wall of the present invention will be described with reference to the drawings. The curtain wall of the present embodiment is installed on the outer wall of a building and constitutes part of the solar power generation system of the building. The solar power generation system is installed together with the curtain wall and generates electricity by sunlight in the curtain wall. In addition, the curtain wall is an outer wall of the building and is installed between the indoor (inside) and outdoor (outside) of the building to form the outer wall of the building. Hereinafter, a plurality of embodiments of the curtain wall will be described in order.

[0010] (First Embodiment) FIG. 1 is a front view showing the curtain wall 1 of the first embodiment, showing a part of the curtain wall 1 installed in the building 10 as viewed from the outdoor side. FIG. 2 is a cross-sectional view showing the curtain wall 1 of the first embodiment, showing the curtain wall 1 cut along a plane including the left-right direction S and the indoor-outdoor direction T. FIG. 3 is a longitudinal sectional view showing the curtain wall 1 of the first embodiment, showing the curtain wall 1 cut along a plane including the up-down direction R and the indoor-outdoor direction T and a part of the building 10.

[0011] When the curtain wall 1 installed in the building 10 is viewed from the front, the up-down direction is the up-down direction R, and the left-right direction is the left-right direction S. In FIG. 1, the up-down direction R is the vertical direction, and the left-right direction S is the horizontal direction. The indoor-outdoor direction T is the indoor-outdoor direction (indoor-outdoor direction) in the curtain wall 1 installed in the building 10. Further, the indoor-outdoor direction T is the front-rear direction (depth direction) and the thickness direction of the curtain wall 1 when the curtain wall 1 installed in the building 10 is viewed from the front, and in FIG. 1, it is the horizontal direction orthogonal to the left-right direction S. Thus, the directions related to the curtain wall 1 are specified in the state of being installed in the building 10. Also, the indoor side and the outdoor side with respect to the curtain wall 1 are the indoor side and the outdoor side in the state of being installed in the building 10.

[0012] As shown in the figure, the building 10 includes a curtain wall 1, an outer wall 11, a building body 12, a boundary portion 13 between the upper and lower floors of the building 10, and a floor portion 14 of each floor of the building 10. The building body 12, the boundary portion 13, and the floor portion 14 of the building 10 are located on the indoor side of the curtain wall 1. The building body 12 is an attachment body to which the curtain wall 1 is attached. The boundary portion 13 is a portion located at the boundary between the upper floor and the lower floor of the building 10, and is located between the floor portion 14 of the upper floor and the floor portion 14 of the lower floor. The floor portion 14 is a usable portion inside the building 10 and is located between the upper and lower boundary portions 13.

[0013] The curtain wall 1 is installed at a location on the outer wall 11 of the building 10 and constitutes the outer wall 11 of the building 10. Also, the curtain wall 1 is disposed on the outdoor side of the building body 12 of the building 10 and is attached to the building body 12 of the building 10. In that state, the curtain wall 1 is located between the boundary portion 13 of the building 10 and the outdoor space 15, and between the floor portion 14 of the building 10 and the outdoor space 15, and is in contact with the outside air. The outdoor space 15 is the outdoor space of the building 10 and the curtain wall 1, and the outside air is the air in the outdoor space 15.

[0014] The curtain wall 1 includes adjacent spandrel portions 1A and vision portions 1B in the vertical direction R. The spandrel portions 1A and the vision portions 1B are alternately provided on the curtain wall 1 in the vertical direction R and are arranged side by side in the left-right direction S respectively. The spandrel portion 1A is the waist portion located on the outdoor side of the boundary portion 13 of the building 10, and the vision portion 1B is the window portion located on the outdoor side of the floor portion 14 of the building 10.

[0015] The spandrel portion 1A is located between the boundary portion 13 of the building 10 (the indoor space 13A of the boundary portion 13) and the outdoor space 15 in the indoor-outdoor direction T and faces the boundary portion 13. The vision portion 1B is located between the floor portion 14 of the building 10 (the indoor space 14A of the floor portion 14) and the outdoor space 15 in the indoor-outdoor direction T and faces the floor portion 14. Thus, the curtain wall 1 is installed between the outdoor space 15 and the indoor space 13A of the boundary portion 13 of the building 10 by the spandrel portion 1A, and is installed between the outdoor space 15 and the indoor space 14A of the floor portion 14 of the building 10 by the vision portion 1B.

[0016] The curtain wall 1 includes a plurality of mullions 2 attached to the building body 12 of the building 10, a plurality of transoms 3 attached to the mullions 2, a plurality of openings 4A, 4B (the first opening 4A, the second opening 4B) formed by the mullions 2 and the transoms 3, and a plurality of panels 5A, 5B (the first panel 5A, the second panel 5B) arranged in the openings 4A, 4B. The first opening 4A is formed in the spandrel part 1A, and the second opening 4B is formed in the vision part 1B. The openings 4A, 4B are formed side by side in the vertical direction R and the horizontal direction S.

[0017] The panels 5A, 5B are transparent panel materials (face materials) and are held by the mullions 2 and the transoms 3. Also, the panels 5A, 5B are square glass panels (for example, sheet glass, laminated glass, or composite glass), and are fixed panels, which are fixed to the square openings 4A, 4B to close the openings 4A, 4B. The first panel 5A is provided in the spandrel part 1A and is arranged in the first opening 4A of the spandrel part 1A. The second panel 5B is a window panel provided in the vision part 1B and is arranged in the second opening 4B of the vision part 1B. The plurality of panels 5A, 5B are arranged side by side in the vertical direction R and the horizontal direction S.

[0018] The mullions 2 and the transoms 3 are forming materials for forming the openings 4A, 4B, and each consists of a metal (for example, aluminum alloy) profile (extruded profile) formed by extrusion molding. Also, the mullion 2 is a vertical member extending in the vertical direction (vertical direction R) and is located on the left and right side portions of the openings 4A, 4B. The transom 3 is a horizontal member extending in the horizontal direction (horizontal direction S) and is located at the upper and lower portions of the openings 4A, 4B. The openings 4A, 4B are respectively surrounded by the upper and lower transoms 3 and the left and right mullions 2. The longitudinal direction of the mullion 2 is the vertical direction R, and the longitudinal direction of the transom 3 is the horizontal direction S.

[0019] The mullions 2 are installed at intervals in the left - right direction S, arranged on the outdoor side of the building body 12 of the building 10, and attached to the building body 12 of the building 10. A plurality of mullions 2 are spaced apart from each other in the left - right direction S with openings 4A, 4B therebetween, and are arranged in sequence in the left - right direction S on the outer wall 11 of the building 10. The transoms 3 are arranged respectively between the mullions 2 adjacent to each other in the left - right direction S, spanned between the left and right mullions 2, and the left and right ends are connected to the left and right mullions 2. Between the mullions 2 adjacent to each other in the left - right direction S, the transoms 3 are arranged at intervals in the up - down direction R and attached to the left and right mullions 2. A plurality of transoms 3 are spaced apart from each other in the up - down direction R with openings 4A, 4B therebetween, and are arranged in sequence in the up - down direction R on the outer wall 11 of the building 10.

[0020] The plurality of mullions 2 and the plurality of transoms 3 are combined in a grid (frame) shape to form a plurality of square - shaped openings 4A, 4B. The plurality of openings 4A, 4B are formed on both the left and right sides of the mullions 2 in the left - right direction S, and are formed on both the upper and lower sides of the transoms 3 in the up - down direction R. Also, the plurality of panels 5A, 5B are arranged on both the left and right sides of the mullions 2 in the left - right direction S, and are arranged on both the upper and lower sides of the transoms 3 in the up - down direction R. The mullions 2 are located between the left and right openings 4A, 4B and between the left and right panels 5A, 5B, and the transoms 3 are located between the upper and lower openings 4A, 4B and between the upper and lower panels 5A, 5B.

[0021] The curtain wall 1 is provided with louvers 20 at locations facing the outdoor space 15. The louvers 20 are horizontal louvers extending in the horizontal direction and have a plurality of fins 21 which are light - shielding materials for blocking sunlight. The louvers 20 and the fins 21 are arranged at positions outside the mullions 2, transoms 3, openings 4A, 4B, and panels 5A, 5B. The fins 21 are made of a metal profile (extruded profile) (for example, made of an aluminum alloy) formed by extrusion molding. The fins 21 are horizontal fins extending in the horizontal direction and project toward the outdoor side of the curtain wall 1. The louvers 20 are blocked from sunlight by the fins 21.

[0022] Here, the louver 20 has three rows of fins 21 arranged at intervals in the vertical direction R, and the louver 20 and the fins 21 are provided at the upper part of the vision part 1B of the curtain wall 1. The plurality of fins 21 are spaced apart from each other in the vertical direction R and arranged side by side in the horizontal direction S. The fin 21 is a louver blade (vane) constituting the louver 20 and is arranged at a position outside the house compared to the second panel 5B which is a window panel. The fin 21 blocks a part of the sunlight irradiated toward the second panel 5B outside the house and reduces the solar radiation at the floor part 14 which is a location inside the second panel 5B.

[0023] The fin 21 has a light-receiving surface part 22 that receives sunlight and a solar cell panel 23 (solar panel) provided on the light-receiving surface part 22. The light-receiving surface part 22 is the irradiated surface part of the fin 21 irradiated with sunlight, and the solar cell panel 23 is provided on at least a part (the whole or a part) of the light-receiving surface part 22. Here, the light-receiving surface part 22 is the upper surface part of the fin 21, and the light-receiving surface part 22 and the solar cell panel 23 are arranged upward. The solar cell panel 23 is provided on the upper side of the fin 21 and is irradiated with sunlight.

[0024] The fin 21 blocks the sunlight heading toward the second panel 5B by receiving sunlight through the light-receiving surface part 22 and the solar cell panel 23. The solar cell panel 23 is a power generation device (solar power generation panel) that generates electricity by receiving sunlight, and converts solar energy into electric energy to generate electricity. Also, the solar cell panel 23 is a film-type solar cell panel (solar cell film) or a coating-type solar cell panel, and is made of, for example, a perovskite solar cell.

[0025] FIG. 4 is a longitudinal sectional view showing the curtain wall 1 of the first embodiment, and shows the fins 21 whose postures have changed with respect to the fins 21 of the curtain wall 1 shown in FIG. 3. As shown in FIGS. 3 and 4, the fin 21 is rotatable, and by rotation, the orientation of the receiving surface portion 22 and the solar cell panel 23 can be changed. In FIG. 3, the fin 21 protrudes horizontally toward the outdoor side, and the fin 21, the receiving surface portion 22, and the solar cell panel 23 are arranged along the horizontal direction (the indoor-outdoor direction T). In FIG. 4, the fin 21 protrudes obliquely downward toward the outdoor side with respect to the horizontal direction, and the fin 21, the receiving surface portion 22, and the solar cell panel 23 are arranged to be inclined obliquely downward toward the outdoor side with respect to the horizontal direction.

[0026] The position of the sun is represented by altitude (elevation angle) and azimuth (azimuth angle), and the altitude and azimuth of the sun gradually change over time. In contrast, the fin 21 rotates to a position (posture) that blocks sunlight in response to a change in altitude or azimuth representing the position of the sun, thereby changing the orientation of the receiving surface portion 22 and the solar cell panel 23. The fin 21 gradually rotates, blocking sunlight while gradually changing the orientation of the solar cell panel 23 to generate electricity by the solar cell panel 23.

[0027] FIG. 5 is a longitudinal sectional view showing the curtain wall 1 of the first embodiment cut along the line X1-X1 in FIG. 1, and the rotated fin 21 with respect to the fin 21 shown by the solid line is shown by the two-dot chain line. FIG. 6 is a cross-sectional view showing the curtain wall 1 of the first embodiment cut along the line X2-X2 in FIG. 1, and shows two fins 21 adjacent to each other in the left-right direction S. FIG. 7 is a cross-sectional view showing the curtain wall 1 of the first embodiment cut along the line X3-X3 in FIG. 1, and FIG. 8 is a longitudinal sectional view showing the location of the stile 2 in the curtain wall 1 of the first embodiment cut along the line X4-X4 in FIG. 7.

[0028] As shown in the figure, the fins 21 extend along the left - right direction S on the outdoor side of the location between the left and right uprights 2 adjacent to each other in the left - right direction S, and are connected to each of the left and right uprights 2 and span across the left and right uprights 2. The left and right fins 21 are adjacent to each other in the left - right direction S with a gap between their ends on the outdoor side of the uprights 2. The uprights 2 protrude to a position on the outdoor side of the panels 5A and 5B and are arranged on the indoor side of the ends of the left and right fins 21 adjacent to each other in the left - right direction S. The solar cell panel 23 is provided on the outdoor - side portion of the receiving surface 22 of the fin 21 and extends in the longitudinal direction (left - right direction S) of the fin 21 between the two ends on both sides in the longitudinal direction of the fin 21. Here, the solar cell panel 23 is a deformable film - type solar cell panel or a coating - type solar cell panel, and is deformed according to the shape of the receiving surface 22 of the fin 21 and is attached to the receiving surface 22.

[0029] The upright 2 has two hollow portions 2A and 2B (first hollow portion 2A, second hollow portion 2B) located on the outdoor side of the panels 5A and 5B and two left - right guide portions 2C. The hollow portions 2A and 2B are outdoor - side hollow portions of the upright 2, are formed in a hollow shape, and extend in the longitudinal direction of the upright 2. The first hollow portion 2A is located on the outdoor side of the panels 5A and 5B, and the second hollow portion 2B is located on the outdoor side of the first hollow portion 2A. The guide portion 2C is a groove portion (guide groove) formed in a groove shape (concave shape) and extends in the longitudinal direction of the upright 2. Also, the guide portion 2C is located on the outdoor side of the first hollow portion 2A and on both the left and right sides of the second hollow portion 2B, and is open toward the side in the left - right direction S of the upright 2.

[0030] The curtain wall 1 has a support 30 that rotatably supports the fins 21, and a rotating device 40 that rotates the fins 21. The support 30 connects the fins 21 to the mullion 2 or the blind 3 in a state where the fins 21 are rotatably supported. Here, the support 30 is fixed to the mullion 2 and connects the fins 21 to the mullion 2 (see Fig. 6). The support 30 protrudes from the mullion 2 to the outdoor side and is arranged between the left and right fins 21. The left and right fins 21 are attached to a common support 30 located between them and are supported by the common support 30. Also, the fins 21 are arranged between the left and right supports 30 and are rotatably attached to the left and right supports 30. Both ends of the fins 21 are rotatably supported by the support 30 respectively.

[0031] The support 30 has a fixing member 31 fixed to the mullion 2, a shaft member 32 protruding left and right from the fixing member 31, and a bearing 33 fixed to the fin 21. The shaft member 32 is a horizontal shaft member extending in the lateral direction and is attached to the bearing 33. The fin 21 is rotatably supported by the shaft member 32 via the bearing 33 and rotates about the shaft member 32. The rotation axis of the fin 21 is the rotation center (axis center) of the fin 21 and extends in the lateral direction (here, the left - right direction S) passing through the center of the shaft member 32. The fin 21 is rotatably supported by the support 30 about a rotation axis (horizontal axis) extending in the lateral direction so as to be able to rotate up and down.

[0032] The rotating device 40 has a motor 41 as a drive source, a conversion mechanism 42 that converts the rotational motion of the motor 41 into linear motion, two moving members 43 that are movable in the longitudinal direction of the mullion 2, a mounting member 44 to which the two moving members 43 are attached, and a connecting member 45 provided on the fin 21. The motor 41 is an electric motor (for example, a stepping motor) operated by electricity, is housed inside the mullion 2 (here, inside the first hollow portion 2A), and is attached to the mullion 2. The conversion mechanism 42 is housed inside the mullion 2 (here, inside the second hollow portion 2B) and moves the moving member 43 in conjunction with the rotation of the motor 41.

[0033] The conversion mechanism 42 is a rack-and-pinion mechanism, which has a pinion 42A (gear) attached to the rotating shaft of the motor 41 and a rack 42B (plate-shaped gear) meshing with the pinion 42A. The rack 42B extends in the longitudinal direction of the vertical column 2, is attached to the attachment member 44, and is connected to the moving member 43 via the attachment member 44. When the pinion 42A rotates by the motor 41, the rack 42B moves in the longitudinal direction of the vertical column 2 in conjunction with the rotation of the pinion 42A. The conversion mechanism 42 causes the rack 42B, the attachment member 44, and the moving member 43 to move in the longitudinal direction of the vertical column 2 in conjunction with the rotation of the motor 41 by the pinion 42A.

[0034] The moving member 43 is a movable member that moves by sliding and extends in the longitudinal direction of the vertical column 2. Further, the moving member 43 is disposed on each of the left and right guide portions 2C of the vertical column 2 and slides along the guide portion 2C. The two moving members 43 are each guided in the longitudinal direction of the vertical column 2 by the guide portion 2C and move in the longitudinal direction of the vertical column 2 together with the attachment member 44 and the rack 42B. The attachment member 44 is disposed from the inside of the second hollow portion 2B to the guide portion 2C through the through hole formed in the vertical column 2 and moves in the longitudinal direction of the vertical column 2 within the through hole.

[0035] The moving member 43 and the connecting member 45 are located on the indoor side of the fin 21. The connecting member 45 is a bracket fixed to the fin 21, protrudes indoors from the fin 21 toward the moving member 43, and extends from the fin 21 to the moving member 43. The connecting member 45 connects the fin 21 to the moving member 43 and rotates together with the fin 21. One of the left and right fins 21 is connected to one of the two moving members 43, and the other of the left and right fins 21 is connected to the other of the two moving members 43. The moving member 43 rotates the connecting member 45, and the connecting member 45 rotates the fin 21. The fin 21 rotates integrally with the connecting member 45 in conjunction with the movement of the moving member 43.

[0036] The moving member 43 has a connecting protrusion 43A that connects the connecting member 45 to the moving member 43. The connecting protrusion 43A rotates the connecting member 45 together with the fin 21. The connecting member 45 has an elongated hole portion 45A to which the connecting protrusion 43A is movably connected. The connecting protrusion 43A is movably disposed inside the elongated hole portion 45A and is connected to the elongated hole portion 45A so that its position inside the elongated hole portion 45A can be changed. When the moving member 43 moves in the longitudinal direction of the side post 2, the connecting protrusion 43A moves in the longitudinal direction of the side post 2 together with the moving member 43, and while changing its position inside the elongated hole portion 45A in the longitudinal direction of the elongated hole portion 45A, rotates the connecting member 45 and the fin 21.

[0037] The rotation device 40 rotates the pinion 42A in one direction and the other direction by the motor 41, and moves the rack 42B, the mounting member 44, the moving member 43, and the connecting protrusion 43A to one side and the other side (upper side and lower side) in the longitudinal direction of the side post 2. The connecting protrusion 43A rotates the connecting member 45 and the fin 21 up and down. The conversion mechanism 42 (pinion 42A, rack 42B), the mounting member 44, the moving member 43, the connecting protrusion 43A, and the connecting member 45 constitute a transmission mechanism that transmits the driving force of the motor 41 to the fin 21 to rotate the fin 21. The rotation device 40 rotates the fin 21 supported by the support 30 by the motor 41 and the transmission mechanism, and changes the orientation of the receiving surface portion 22 of the fin 21 and the solar cell panel 23.

[0038] FIG. 9 is a block diagram showing the configuration of a solar power generation system including the curtain wall 1 of the first embodiment. As shown in the figure, the electricity generated by the solar cell panel 23 of the fin 21 is sent to the storage battery 51 via the power conditioner 50 and stored in the storage battery 51. The power conditioner 50 is a hybrid type power conditioner and sends the DC electric current generated by the solar cell panel 23 to the storage battery 51. The electricity stored in the storage battery 51 is supplied to the distribution board 52 and the motor 41 of the rotating device 40 via the power conditioner 50. The electricity supplied from the storage battery 51 is a DC current, which is converted from DC to AC by the power conditioner 50 and supplied to the motor 41 and the facilities of the building 10 that use electricity via the distribution board 52.

[0039] The rotating device 40 including the motor 41 operates by the electricity (power) supplied from the storage battery 51 to rotate the fin 21. The control device 53 is connected to the rotating device 40 and controls the rotating device 40. At this time, the control device 53 controls the motor 41 of the rotating device 40 to rotate the motor 41. The motor 41 rotates by the electricity supplied from the storage battery 51. The control device 53 controls the rotating device 40 to rotate the fin 21 by the rotating device 40, and while blocking the sunlight with the fin 21, makes the orientation of the receiving surface portion 22 of the fin 21 and the solar cell panel 23 follow the altitude or azimuth of the sun representing the position of the sun and change. Thereby, the orientation of the solar cell panel 23 changes to the orientation corresponding to the altitude or azimuth of the sun, and the solar cell panel 23 is oriented in the direction corresponding to the altitude or azimuth of the sun.

[0040] In this way, the control device 53 makes the receiving surface portion 22 of the fin 21 and the solar cell panel 23 rotate following the change in the altitude or azimuth of the sun, and changes the orientation of the receiving surface portion 22 of the fin 21 and the solar cell panel 23. The position where the fin 21 is rotated is a position where sunlight can be blocked and a position where sunlight irradiates the solar cell panel 23 (a position where power generation by the solar cell panel 23 is possible), and is set so that the power generation efficiency by the solar cell panel 23 becomes higher. By the rotation of the fin 21, the orientation of the solar cell panel 23 changes to the orientation corresponding to the altitude or azimuth of the sun, and the solar cell panel 23 is oriented in the direction where sunlight irradiates.

[0041] A sunlight sensor 54 is connected to the control device 53. The sunlight sensor 54 is a detector that detects the altitude and azimuth representing the position of the sun. For example, it is installed on the fin 21, the gable 2, the blank 3, or the building 10, and transmits the detection results of the altitude and azimuth of the sun to the control device 53. The control device 53 receives the detection results of the altitude and azimuth of the sun from the sunlight sensor 54 and acquires the data of the altitude and azimuth of the sun. Based on the altitude or azimuth of the sun detected by the sunlight sensor 54, the control device 53 controls the rotating device 40 (motor 41) to rotate the fin 21 by the rotating device 40, and changes the orientation of the solar cell panel 23 to follow the altitude or azimuth of the sun detected by the sunlight sensor 54.

[0042] Here, the sunlight sensor 54 is installed on the rooftop portion of the building 10. Also, based on the altitude of the sun, the control device 53 controls the rotating device 40 to rotate the fin 21 by the rotating device 40, and changes the orientation of the solar cell panel 23 to follow the altitude of the sun. The rotating device 40 is controlled by the control device 53 to rotate the fin 21 up and down, and changes the orientation of the solar cell panel 23 to follow the altitude of the sun and change up and down. By the rotating device 40, the fin 21 rotates upward following the increase in the altitude of the sun, and the orientation of the solar cell panel 23 changes upward following the rotation of the fin 21 as the altitude of the sun increases. Also, by the rotating device 40, the fin 21 rotates downward following the decrease in the altitude of the sun, and the orientation of the solar cell panel 23 changes downward following the rotation of the fin 21 as the altitude of the sun decreases.

[0043] In the curtain wall 1 of the first embodiment described above, on the outdoor side of the second panel 5B which is the window panel of the curtain wall 1, the fins 21 reduce the irradiation of sunlight on the second panel 5B, and the solar cell panel 23 of the fins 21 receives sunlight, enabling efficient power generation by sunlight. Also, the fins 21 are rotated to change the orientation of the solar cell panel 23 to follow (here, follow) the altitude or azimuth of the sun (in this case, follow the altitude of the sun), improving the power generation efficiency of the solar cell panel 23 by sunlight. By making the orientation of the solar cell panel 23 follow either the altitude or azimuth of the sun, it is possible to suppress the complexity of the structure of the support 30 and the rotating device 40 of the fins 21, and easily make the orientation of the solar cell panel 23 follow the altitude or azimuth of the sun.

[0044] By using the sunlight sensor 54, based on the detection result of the altitude or azimuth of the sun by the sunlight sensor 54, the orientation of the solar cell panel 23 can be accurately made to follow the altitude or azimuth of the sun. In the fins 21 that rotate up and down, corresponding to the change in the altitude of the sun, while the fins 21 block sunlight, the solar cell panel 23 can efficiently generate electricity. The film-type solar cell panel 23 or the coating-type solar cell panel 23 is mounted on the receiving surface portion 22 of the fins 21, and the solar cell panel 23 can be deformed according to the shape of the receiving surface portion 22 of the fins 21, easily providing the solar cell panel 23 on the receiving surface portion 22 of the fins 21.

[0045] Note that the solar cell panel 23 is not limited to a film-type solar cell panel or a coating-type solar cell panel, and may be other solar cell panels (for example, plate-shaped solar cell panels). The control device 53 may be provided inside the curtain wall 1 (for example, around the motor 41), or may be provided indoors in the building 10 (for example, at the boundary portion 13, the floor portion 14) as a part of the curtain wall 1.

[0046] Next, the curtain wall 1 of another embodiment will be described. Regarding the curtain wall 1 of another embodiment, the description of the same matters as those of the curtain wall 1 of the first embodiment will be omitted, and mainly the matters different from those of the curtain wall 1 of the first embodiment will be described. Also, for the curtain wall 1 of another embodiment, the components corresponding to the components of the curtain wall 1 of the first embodiment will be given the same names as those of the components of the curtain wall 1 of the first embodiment.

[0047] (Second Embodiment) FIG. 10 is a block diagram showing the configuration of a photovoltaic power generation system including the curtain wall 1 of the second embodiment. As shown in the figure, in the curtain wall 1 of the second embodiment, the sunlight sensor 54 is not connected to the control device 53. The control device 53 controls the rotating device 40 based on the data of the altitude or azimuth of the sun corresponding to the date and time (date and time), and rotates the fin 21 by the rotating device 40, so that the orientation of the solar cell panel 23 follows and changes according to the altitude or azimuth of the sun based on the data of the altitude or azimuth of the sun.

[0048] The data of the altitude or azimuth of the sun is data indicating the altitude or azimuth of the sun that changes corresponding to the date and time, and is preset and stored in the storage unit of the control device 53. The control device 53 acquires the data of the altitude or azimuth of the sun from the storage unit. The control device 53 controls the rotating device 40 (motor 41) based on the altitude or azimuth of the sun indicated by the acquired data, and rotates the fin 21 by the rotating device 40, so that the orientation of the solar cell panel 23 follows and changes according to the altitude or azimuth of the sun indicated by the acquired data.

[0049] In the curtain wall 1 of the second embodiment, based on the data of the altitude or azimuth of the sun corresponding to the date and time, the orientation of the solar cell panel 23 can accurately follow the altitude or azimuth of the sun. Note that the data of the altitude or azimuth of the sun may be data calculated by a calculation formula for calculating the altitude or azimuth of the sun from the date and time. In this case, the control device 53 calculates the altitude or azimuth of the sun from the date and time by the calculation formula and acquires the data of the altitude or azimuth of the sun.

[0050] (Third Embodiment) FIG. 11 is a front view showing the curtain wall 1 of the third embodiment, showing a part of the curtain wall 1 installed in the building 10 as viewed from the outdoor side. FIG. 12 is a cross-sectional view showing the curtain wall 1 of the third embodiment, showing the curtain wall 1 cut along a plane including the left-right direction S and the indoor-outdoor direction T. FIG. 13 is a longitudinal sectional view showing the curtain wall 1 of the third embodiment, showing the curtain wall 1 cut along a plane including the up-down direction R and the indoor-outdoor direction T and a part of the building 10.

[0051] As shown in the drawings, in the curtain wall 1 of the third embodiment, the louver 60 is a vertical louver extending in the vertical direction, and the plurality of fins 61 of the louver 60 are vertical fins extending in the vertical direction. The louver 60 has a plurality of rows of fins 61 arranged at intervals in the left-right direction S, and the louver 60 and the fins 61 are provided in the vision part 1B and the spandrel part 1A of the curtain wall 1. The plurality of fins 61 are spaced apart from each other in the left-right direction S and arranged side by side in the up-down direction R. The receiving surface part 62 of the fin 61 is the left and right side surface parts of the fin 61, and the solar cell panels 63 are provided on each of the left and right receiving surface parts 62. The left and right solar cell panels 63 are provided on the left and right lateral sides of the fin 61, and the left and right receiving surface parts 62 and the solar cell panels 63 are arranged facing the left and right sides of the fin 61.

[0052] FIG. 14 is a cross-sectional view showing the curtain wall 1 of the third embodiment, showing the fins 61 whose postures have changed with respect to the fins 61 of the curtain wall 1 shown in FIG. 12. As shown in FIGS. 12 and 14, the fin 61 is rotatable left and right, and by rotation, the directions of the receiving surface portion 62 and the solar cell panel 63 can be changed left and right. In FIG. 12, the fin 61 projects outward from the outside of the room in the indoor-outdoor direction T, and the fin 61, the receiving surface portion 62, and the solar cell panel 63 are arranged along the indoor-outdoor direction T. In FIG. 14, the fin 61 projects obliquely in the left-right direction S toward the outside of the room with respect to the indoor-outdoor direction T, and the fin 61, the receiving surface portion 62, and the solar cell panel 63 are arranged obliquely in the left-right direction S toward the outside of the room with respect to the indoor-outdoor direction T.

[0053] FIG. 15 is a cross-sectional view showing the curtain wall 1 of the third embodiment cut along the line X5-X5 of FIG. 11, and the fin 61 rotated with respect to the fin 61 shown by the solid line is shown by the two-dot chain line. FIG. 16 is a longitudinal sectional view showing the curtain wall 1 of the third embodiment cut along the line X6-X6 of FIG. 11, and shows two fins 61 adjacent to each other in the vertical direction R. FIG. 17 is a longitudinal sectional view showing the curtain wall 1 of the third embodiment cut along the line X7-X7 of FIG. 11, and FIG. 18 is a longitudinal sectional view showing a portion of the third eye in the curtain wall 1 of the third embodiment cut along the line X8-X8 of FIG. 17.

[0054] As shown in the drawing, the fin 61 extends along the vertical direction R on the outdoor side at a position between the third blind at the upper part of the spandrel portion 1A and the third blind at the lower part of the vision portion 1B, and is connected to each of the upper and lower third blinds and spans across the upper and lower third blinds. The upper and lower fins 61 are adjacent to each other in the vertical direction R with a gap between their ends on the outdoor side of the third blind. The third blind projects to a position outside the panels 5A and 5B and is arranged on the indoor side of the ends of the upper and lower fins 61 adjacent to each other in the vertical direction R. The solar cell panel 63 extends in the longitudinal direction of the fin 61 between the ends on both sides in the longitudinal direction (vertical direction R) of the fin 61.

[0055] The blind 3 has two hollow portions 3A and 3B (first hollow portion 3A, second hollow portion 3B) located on the outdoor side of the panels 5A and 5B, and two guide portions 3C, one above and one below. The hollow portions 3A and 3B are the outdoor hollow portions of the blind 3 and extend in the longitudinal direction of the blind 3. The guide portions 3C extend in the longitudinal direction of the blind 3, are located on both the upper and lower sides of the second hollow portion 3B, and are open towards the upper and lower sides of the blind 3 respectively.

[0056] The support 70 is fixed to the blind 3 and connects the fins 61 to the blind 3 (see Fig. 16). The support 70 protrudes from the blind 3 towards the outdoor side and is arranged between the upper and lower fins 61. The upper and lower fins 61 are attached to a common support 70 located between them and are supported by the common support 70. Also, the fins 61 are arranged between the upper and lower supports 70 and are rotatably attached to the upper and lower supports 70. The support 70 has a fixing member 71 fixed to the blind 3, a shaft member 72 protruding vertically from the fixing member 71, and a bearing 73 fixed to the fin 61. The shaft member 72 is a vertical shaft member extending in the vertical direction. The rotation axis of the fin 61 extends in the vertical direction (here, the vertical direction R) passing through the center of the shaft member 72. The fin 61 is supported by the support 70 so as to be rotatable left and right about a rotation axis (vertical axis) extending in the vertical direction.

[0057] The rotation device 80 has a motor 81, a conversion mechanism 82, two moving members 83 movable in the longitudinal direction of the blind 3, a mounting member 84 to which the two moving members 83 are attached, and a connecting member 85 provided on the fin 61. The motor 81 is housed inside the blind 3 (here, inside the first hollow portion 3A) and is attached to the blind 3. The conversion mechanism 82 is housed inside the blind 3 (here, inside the second hollow portion 3B). The pinion 82A of the conversion mechanism 82 is attached to the rotation axis of the motor 81. The rack 82B of the conversion mechanism 82 extends in the longitudinal direction of the blind 3 and moves in the longitudinal direction of the blind 3 in conjunction with the rotation of the pinion 82A. The conversion mechanism 82 causes the rack 82B, the mounting member 84, and the moving members 83 to move in the longitudinal direction of the blind 3 in conjunction with the rotation of the motor 81 by the pinion 82A.

[0058] The moving member 83 extends in the longitudinal direction of the blind 3 and is disposed on each of the upper and lower guide portions 3C of the blind 3, and slides along the guide portion 3C. The two moving members 83 are respectively guided in the longitudinal direction of the blind 3 by the guide portion 3C, and together with the mounting member 84 and the rack 82B, move in the longitudinal direction of the blind 3. The mounting member 84 is disposed from the inside of the second hollow portion 3B to the guide portion 3C through the through hole formed in the blind 3, and moves in the longitudinal direction of the blind 3 within the through hole.

[0059] The upper fin 61 of the upper and lower fins 61 is connected to the upper moving member 83 of the upper and lower moving members 83, and the lower fin 61 of the upper and lower fins 61 is connected to the lower moving member 83 of the upper and lower moving members 83. The connecting protrusion 83A of the moving member 83 is connected to the long hole portion 85A of the connecting member 85. When the moving member 83 moves in the longitudinal direction of the blind 3, the connecting protrusion 83A moves in the longitudinal direction of the blind 3 together with the moving member 83, and rotates the connecting member 85 and the fin 61. The rotating device 80 rotates the pinion 82A in one direction and the other direction by the motor 81, and moves the rack 82B, the mounting member 84, the moving member 83, and the connecting protrusion 83A to one side and the other side (left side and right side) in the longitudinal direction of the blind 3, and rotates the connecting member 85 and the fin 61 left and right by the connecting protrusion 83A.

[0060] The rotating device 80 is controlled in the same manner as the rotating device 40 in the first embodiment by the control device 53 (see FIG. 9) in the curtain wall 1 of the first embodiment, or is controlled in the same manner as the rotating device 40 in the second embodiment by the control device 53 (see FIG. 10) in the curtain wall 1 of the second embodiment. Further, the control device 53 controls the rotating device 80 based on the azimuth of the sun, rotates the fin 61 by the rotating device 80, and changes the orientation of the solar cell panel 63 to follow the azimuth of the sun. The rotating device 80 is controlled by the control device 53 to rotate the fin 61 left and right, and changes the orientation of the solar cell panel 63 to follow the azimuth of the sun and change left and right.

[0061] The azimuth of the sun changes from one side to the other side in the left - right direction S with respect to the fin 61. While the azimuth of the sun is located on one side in the left - right direction S with respect to the fin 61, the rotating device 80 arranges the solar cell panel 63 on one side in the left - right direction S among the left and right solar cell panels 63 of the fin 61 facing the sun. In this state, by the rotating device 80, the fin 61 rotates toward the other side in the left - right direction S following the change of the azimuth of the sun toward the other side in the left - right direction S, and the orientation of the solar cell panel 63 on one side changes toward the other side in the left - right direction S following the change of the azimuth of the sun toward the other side in the left - right direction S accompanying the rotation of the fin 61.

[0062] While the azimuth of the sun is located on the other side in the left - right direction S with respect to the fin 61, the rotating device 80 arranges the solar cell panel 63 on the other side in the left - right direction S among the left and right solar cell panels 63 of the fin 61 facing the sun. In this state, by the rotating device 80, the fin 61 rotates toward the other side in the left - right direction S following the change of the azimuth of the sun toward the other side in the left - right direction S, and the orientation of the solar cell panel 63 on the other side changes toward the other side in the left - right direction S following the change of the azimuth of the sun toward the other side in the left - right direction S accompanying the rotation of the fin 61. In the curtain wall 1 of the third embodiment, corresponding to the change in the azimuth of the sun, while the fin 61 blocks sunlight, the solar cell panel 63 can generate electricity efficiently.

[0063] In the curtain wall 1 of the first embodiment, the fin 21 is supported by the support 30, and in the curtain wall 1 of the second embodiment, the fin 61 is supported by the support 70. In contrast, the fins 21 and 61 are not limited to being supported by the supports 30 and 70 respectively, and may be rotatably supported by other supports. For example, the fins 21 and 61 may be connected to the mullion 2 or the transom 3, and the mullion 2 or the transom 3 may rotatably support the fins 21 and 61. In this case, the mullion 2 or the transom 3 serves as the support for supporting the fins 21 and 61.

[0064] The present invention is not limited to the curtain wall 1 provided with the fin 2 and the blind 3, and can also be applied to other curtain walls (such as a curtain wall provided with a plurality of curtain wall units). For example, a curtain wall provided with a plurality of curtain wall units includes an upper frame, a lower frame, and a pair of vertical frames provided on the frame of the curtain wall unit. The upper frame and the lower frame are horizontal members, and the pair of vertical frames are vertical members. The fins 21 and 61 are connected to the vertical or horizontal members of the curtain wall unit.

[0065] As described above, in the present embodiment, the curtain walls described in the following (1) to (7) are disclosed.

[0066] (1) A curtain wall provided with a window panel, comprising fins arranged on the outdoor side of the window panel to block sunlight, wherein the fins have solar cell panels provided on the light-receiving surfaces that receive sunlight. In the curtain wall described in (1), on the outdoor side of the window panel of the curtain wall, while reducing the irradiation of sunlight on the window panel, it is possible to efficiently generate electricity by sunlight.

[0067] (2) In the curtain wall described in (1), a support for rotatably supporting the fins, a rotating device for rotating the fins, a control device for controlling the rotating device to rotate the fins so that the orientation of the solar cell panels follows the altitude or azimuth of the sun and changes, and a curtain wall provided therewith. In the curtain wall described in (2), the power generation efficiency of the solar cell panels by sunlight can be improved.

[0068] (3) In the curtain wall described in (2), The control device is a curtain wall that controls the rotating device to rotate the fins based on the altitude or azimuth of the sun detected by a sunlight sensor. In the curtain wall described in (3), based on the detection result of the altitude or azimuth of the sun by the sunlight sensor, the orientation of the solar panel can accurately follow the altitude or azimuth of the sun.

[0069] (4) In the curtain wall described in (2), The control device is a curtain wall that controls the rotating device to rotate the fins based on data of the altitude or azimuth of the sun corresponding to the date and time. In the curtain wall described in (4), based on the data of the altitude or azimuth of the sun corresponding to the date and time, the orientation of the solar panel can accurately follow the altitude or azimuth of the sun.

[0070] (5) In the curtain wall described in any one of (2) to (4), The fin is supported by the support so as to be rotatable up and down about a rotation axis extending in the horizontal direction. The control device is a curtain wall that causes the orientation of the solar panel to follow and change with the altitude of the sun. In the curtain wall described in (5), corresponding to the change in the altitude of the sun, while blocking sunlight with the fins, the solar panel can efficiently generate electricity.

[0071] (6) In the curtain wall described in any one of (2) to (4), The fin is supported by the support so as to be rotatable left and right about a rotation axis extending in the vertical direction. The control device is a curtain wall that causes the orientation of the solar panel to follow and change with the azimuth of the sun. In the curtain wall described in (6), corresponding to the change in the azimuth of the sun, while blocking sunlight with the fins, the solar panel can efficiently generate electricity.

[0072] (7) In the curtain wall according to any one of (1) to (6), the solar cell panel is a film-type solar cell panel or a coating-type solar cell panel mounted on the receiving surface portion, and the curtain wall is such. In the curtain wall according to (7), the solar cell panel can be easily provided on the receiving surface portion of the fin.

Explanation of reference numerals

[0073] 1 ··· Curtain wall, 1A ··· Spandrel part, 1B ··· Vision part, 2 ··· Side post, 2A ··· First hollow part, 2B ··· Second hollow part, 2C ··· Guide part, 3 ··· Blind, 3A ··· First hollow part, 3B ··· Second hollow part, 3C ··· Guide part, 4A ··· First opening, 4B ··· Second opening, 5A ··· First panel, 5B ··· Second panel, 10 ··· Building, 11 ··· Outer wall, 12 ··· Body, 13 ··· Boundary part, 13A ··· Indoor space, 14 ··· Floor part, 14A ··· Indoor space, 15 ··· Outdoor space, 20 ··· Louver, 21 ··· Fin, 22 ··· Receiving surface part, 23 ··· Solar cell panel, 30 ··· Support, 31 ··· Fixing material, 32 ··· Shaft material, 33 ··· Bearing, 40 ··· Rotating device, 41 ··· Motor, 42 ··· Conversion mechanism, 42A ··· Pinion, 42B ··· Rack, 43 ··· Moving material, 43A ··· Connecting protrusion, 44 ··· Mounting material, 45 ··· Connecting material, 45A ··· Long hole part, 50 ··· Power conditioner, 51 ··· Storage battery, 52 ··· Distribution board, 53 ··· Control device, 54 ··· Solar sensor, 60 ··· Louver, 61 ··· Fin, 62 ··· Receiving surface part, 63 ··· Solar cell panel, 70 ··· Support, 71 ··· Fixing material, 72 ··· Shaft material, 73 ··· Bearing, 80 ··· Rotating device, 81 ··· Motor, 82 ··· Conversion mechanism, 82A ··· Pinion, 82B ··· Rack, 83 ··· Moving material, 83A ··· Connecting protrusion, 84 ··· Mounting material, 85 ··· Connecting material, 85A ··· Long hole part, R ··· Vertical direction, S ··· Horizontal direction, T ··· Inside / outside direction of the building.

Claims

1. A curtain wall provided with a window panel, comprising fins arranged on the outdoor side of the window panel to block sunlight, wherein the fins have solar cell panels provided on the light-receiving surfaces receiving sunlight.

2. The curtain wall according to claim 1, comprising a support for rotatably supporting the fins, a rotating device for rotating the fins, and a control device for controlling the rotating device to rotate the fins so that the orientation of the solar cell panels follows and changes with the altitude or azimuth of the sun. The curtain wall is provided with the above components.

3. The curtain wall according to claim 2, wherein the control device controls the rotating device to rotate the fins based on the altitude or azimuth of the sun detected by a sunlight sensor.

4. The curtain wall according to claim 2, wherein the control device controls the rotating device to rotate the fins based on data of the altitude or azimuth of the sun corresponding to the date and time.

5. In the curtain wall according to any one of claims 2 to 4, the fins are rotatably supported vertically by the support about a rotation axis extending in the lateral direction, and the control device changes the orientation of the solar cell panels to follow the altitude of the sun.

6. In the curtain wall according to any one of claims 2 to 4, the fins are rotatably supported horizontally by the support about a rotation axis extending in the longitudinal direction, and the control device changes the orientation of the solar cell panels to follow the azimuth of the sun.

7. In the curtain wall according to any one of claims 1 to 4, the solar cell panels are film-type solar cell panels or coating-type solar cell panels mounted on the light-receiving surfaces.

Images