Photovoltaic curtain wall

Abstract

The invention relates to the technical field of photovoltaic curtain walls, and discloses a photovoltaic curtain wall which comprises a supporting piece arranged outside a building outer wall and a curtain wall body installed on the supporting piece, the whole curtain wall body is obliquely arranged, the bottom of the curtain wall body inclines towards one side of the building outer wall, and the curtain wall body comprises a plurality of photovoltaic panels and a plurality of pieces of tempered glass. The photovoltaic panels are obliquely arranged at equal intervals in the height direction, the photovoltaic panels are parallel to one another, a piece of tempered glass is fixed between every two adjacent photovoltaic panels, the photovoltaic panels and the tempered glass form a broken-line-shaped structure, after sunlight irradiates the photovoltaic panels, part of light can be absorbed and converted into electric energy, and the electric energy is converted into electric energy. And the residual light passes through the toughened glass through diffuse reflection to enter a room, so that the cost can be reduced, the power generation efficiency can be ensured, and indoor lighting can be considered at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic curtain walls, and in particular to a photovoltaic curtain wall. Background Art

[0002] Curtain wall is the outer wall of the building, which is non-load-bearing and is hung like a curtain, so it is also called "curtain wall". It is a lightweight wall with decorative effect commonly used in modern large and high-rise buildings. It is composed of panels and supporting structure systems, and can have a certain displacement ability relative to the main structure or a certain deformation ability itself, and is an external protective structure or decorative structure of the building that does not bear the effects of the main structure.

[0003] like Figure 1 As shown, most of the existing common photovoltaic curtain walls are at an angle of 90° to the ground and are fixedly installed outside the exterior wall of the building. This type of photovoltaic curtain wall has the problem of low light energy utilization rate; for example, a hidden frame photovoltaic glass curtain wall disclosed in Chinese patent CN110748059A has the problem that the angle cannot be adjusted and cannot form an angle of 90° or close to 90 degrees with the sunlight, and cannot maximize the use of sunlight.

[0004] At present, some photovoltaic curtain wall structures with adjustable angles have also appeared, such as Figure 2 As shown in the figure, the installation angle of the photovoltaic curtain wall is adjustable. By adjusting the angle of the photovoltaic curtain wall, the angle of the photovoltaic panel can be adjusted according to the trajectory of the sun. For example, Chinese patent CN102684557A discloses a solar photovoltaic power generation device for exterior walls, but this type of photovoltaic curtain wall has the problem of high cost of use. Generally speaking, the cost of a photovoltaic curtain wall with a variable angle and tracking sunlight may be around 1,500 to 3,500 yuan per square meter. If it is a small project with relatively low requirements for accuracy and performance, the cost may be close to 1,500 yuan per square meter; while for large projects used in high-end buildings and with high requirements for tracking accuracy, power generation efficiency, etc., the cost may exceed 3,500 yuan per square meter, or even higher, and the above-mentioned photovoltaic panels installed behind the glass curtain wall will also affect indoor lighting.

[0005] Therefore, there is a need for a photovoltaic curtain wall that is low in cost and can take into account the efficiency of sunlight utilization. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a photovoltaic curtain wall, which can reduce costs while ensuring power generation efficiency and taking into account indoor lighting.

[0007] The present invention provides a photovoltaic curtain wall, comprising: a support member disposed outside the building exterior wall and a curtain wall body mounted on the support member. The curtain wall body is disposed obliquely as a whole, and the bottom of the curtain wall body inclines towards the building exterior wall side. The curtain wall body includes a plurality of photovoltaic panels and a plurality of toughened glasses. The plurality of photovoltaic panels are disposed obliquely at equal intervals in the height direction, and the plurality of photovoltaic panels are parallel to each other. A toughened glass is fixed between two adjacent photovoltaic panels. The photovoltaic panel and the toughened glass form a zigzag structure. After sunlight irradiates on the photovoltaic panel, part of the light will be absorbed and converted into electric energy, and the remaining light will enter the room through the toughened glass by diffuse reflection.

[0008] Optionally, the included angle between the curtain wall body and the horizontal plane is 72°.

[0009] Optionally, a keel is installed at the top of the curtain wall body, and the keel is connected to the support member by a stay cable to tow the curtain wall body.

[0010] Optionally, an outdoor air inlet is provided at the bottom of the glass cover plate of the photovoltaic panel, an outdoor air outlet is provided at the top of the glass cover plate of the photovoltaic panel, and an inclined plate is installed obliquely in the internal cavity of the photovoltaic panel. The included angle between the inclined plate and the glass cover plate is an acute angle, and the bottom of the inclined plate is close to the outdoor air inlet.

[0011] Optionally, a first indoor ventilation opening is formed at a position corresponding to the outdoor air inlet at the bottom of the back plate of the photovoltaic panel, and a second indoor ventilation opening is formed at a position corresponding to the outdoor air outlet at the top of the back plate of the photovoltaic panel.

[0012] Optionally, louvers are installed at the outdoor air inlet, the outdoor air outlet, the first indoor ventilation opening and the second indoor ventilation opening. A temperature sensor is installed in the building interior. When it is monitored that the indoor temperature exceeds the threshold value, each louver is opened.

[0013] Optionally, the louver is connected with a towing rod, the towing rod is connected with a driving assembly, and the driving assembly drives the towing rod to move along the inclined direction of the photovoltaic panel, thereby driving the louver to open and close.

[0014] Optionally, both the light transmittance and the photoelectric conversion rate of the photovoltaic panel are 20%.

[0015] Optionally, the photovoltaic panel and the toughened glass are fixedly connected by a connecting member, and the toughened glass is a hollow toughened glass.

[0016] Optionally, the support member includes a plurality of I-beams, and the plurality of I-beams are arranged at intervals outside the building exterior wall.

[0017] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0018] A photovoltaic curtain wall provided by the present invention simplifies the structure of the curtain wall and reduces the later maintenance difficulty by installing a support member outside the building exterior wall so that the curtain wall body can be integrally inclined. Compared with a photovoltaic curtain wall with an adjustable installation angle, the power generation efficiency is comparable. By alternately connecting multiple photovoltaic panels and tempered glass to form a zigzag curtain wall structure, the photovoltaic panels are inclined upward. After sunlight shines on the photovoltaic panels, part of the light is absorbed and converted into electric energy, and the remaining light enters the room through the tempered glass by diffuse reflection. This design not only ensures the efficient utilization of solar energy but also improves the natural lighting level in the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 6 is a schematic structural diagram of a fixedly installed photovoltaic curtain wall in the prior art;

[0020] Figure 2 FIG. 10 is a schematic structural diagram of a photovoltaic curtain wall with an adjustable installation angle in the prior art;

[0021] Figure 3 FIG. 14 is a schematic structural diagram of a photovoltaic curtain wall provided by an embodiment of the present invention from a first perspective;

[0022] Figure 4 FIG. 18 is a schematic structural diagram of a photovoltaic curtain wall provided by an embodiment of the present invention from a second perspective;

[0023] Figure 5 FIG. 22 is a partial schematic structural diagram of a photovoltaic curtain wall provided by an embodiment of the present invention.

[0024] DESCRIPTION OF THE REFERENCE NUMERALS:

[0025] 1, stay cable; 2, keel; 3, photovoltaic panel; 4, connecting member; 5, tempered glass; 6, floor slab; 7, floor; 8, support member; 9, internal cavity; 10, inclined plate; 11, outdoor air inlet; 12, outdoor air outlet; 13, first indoor ventilation opening; 14, towing rod; 15, second indoor ventilation opening; 16, drive assembly; 17, louver; 18, glass cover plate; 19, back plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following describes in detail a specific embodiment of the present invention with reference to the drawings. It should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0028] Existing fixed photovoltaic curtain walls have the problem of low light energy utilization rate, and angle-adjustable photovoltaic curtain walls have the problem of too high construction cost.

[0029] Based on the above problems existing in the existing photovoltaic curtain walls, for this reason, the embodiments of the present invention provide a photovoltaic curtain wall, which can ensure the power generation efficiency while reducing the cost, and can also take into account indoor lighting while reducing the cost.

[0030] At least one embodiment of the present invention provides a photovoltaic curtain wall, including: a support member disposed outside the building exterior wall and a curtain wall body installed on the support member. The curtain wall body is integrally inclined, and the bottom of the curtain wall body is inclined toward the building exterior wall side. The curtain wall body includes a plurality of photovoltaic panels and a plurality of tempered glasses. The plurality of photovoltaic panels are inclined and arranged at equal intervals in the height direction, and the plurality of photovoltaic panels are parallel to each other. A tempered glass is fixed between two adjacent photovoltaic panels. The photovoltaic panel and the tempered glass form a zigzag structure. After sunlight shines on the photovoltaic panel, part of the light will be absorbed and converted into electric energy, and the remaining light will enter the room through the tempered glass by diffuse reflection.

[0031] In the photovoltaic curtain wall provided by the above embodiment of the present invention, by installing a support member outside the building exterior wall, the curtain wall body can be integrally inclined, reducing the cost, and by alternately connecting a plurality of photovoltaic panels and tempered glasses to form a zigzag curtain wall structure, the photovoltaic panels are inclined upward. After sunlight shines on the photovoltaic panels, part of the light will be absorbed and converted into electric energy, and the remaining light will enter the room through the tempered glass by diffuse reflection.

[0032] The present invention will be described below through several specific embodiments. To keep the description clear and concise for the following embodiments of the present invention, the detailed descriptions of known functions and known components may be omitted. When any component of the embodiments of the present invention appears in more than one drawing, the component may be denoted by the same reference numeral in each drawing.

[0033] Refer to Figure 3 and Figure 4 , Figure 3A schematic structural view of a photovoltaic curtain wall from a first perspective provided by an embodiment of the present invention Figure 4 A schematic structural view of a photovoltaic curtain wall from a second perspective provided by an embodiment of the present invention, as Figure 3 and Figure 4 shown, an embodiment of the present invention provides a photovoltaic curtain wall, including: a support member 8 disposed outside the building exterior wall and a curtain wall body installed on the support member 8. The support member 8 is located outside the building exterior wall and serves as the main load-bearing structure of the curtain wall. Usually, high-strength steel or aluminum alloy is used to ensure stability and durability. The design of the support member 8 simplifies the overall structure, avoids a complex installation angle adjustment mechanism, and reduces the construction difficulty and cost. The curtain wall body is integrally inclined, and the bottom of the curtain wall body is inclined towards the building exterior wall side. The overall inclined design with the bottom inclined towards the building exterior wall side not only conforms to architectural aesthetics but also optimizes the sunlight reception angle. The curtain wall body includes multiple photovoltaic panels 3 and multiple toughened glasses 5. The multiple photovoltaic panels 3 are arranged at equal intervals and inclined along the height direction. The multiple photovoltaic panels 3 are parallel to each other to ensure that each photovoltaic panel 3 can efficiently receive sunlight. A toughened glass 5 is fixed between two adjacent photovoltaic panels 3. The photovoltaic panel 3 and the toughened glass 5 form a zigzag structure, forming a unique zigzag structure. The photovoltaic panel 3 is inclined upward to ensure that each photovoltaic panel 3 can receive sunlight at the best angle and maximize the power generation efficiency. The zigzag structure gives the building a modern and technological sense. After sunlight shines on the photovoltaic panel 3, part of the light is absorbed and converted into electrical energy, and the remaining light enters the room through the toughened glass 5 through diffuse reflection.

[0034] The photovoltaic curtain wall provided by the present invention simplifies the structure of the curtain wall by installing a support member outside the building exterior wall, enabling the curtain wall body to be integrally inclined. Compared with a photovoltaic curtain wall with adjustable installation angles, the maintenance difficulty in the later stage is reduced, and the power generation efficiency is almost the same. By alternately connecting multiple photovoltaic panels and toughened glasses to form a zigzag curtain wall structure, the photovoltaic panels are inclined upward. After sunlight shines on the photovoltaic panels, part of the light is absorbed and converted into electrical energy, and the remaining light enters the room through the toughened glass through diffuse reflection. This design not only ensures the efficient utilization of solar energy but also improves the natural lighting level in the room.

[0035] Specifically, the included angle between the curtain wall body and the horizontal plane is 72°. Compared with a curtain wall with adjustable angles, the cost is reduced, the maintenance difficulty in the later stage is reduced, and the power generation efficiency is almost the same.

[0036] Refer to again Figure 4, considering that for some buildings with relatively high single - floor heights, relying solely on the support member 8 to support the curtain wall, due to the overall inclination of the curtain wall, the upper part of the curtain wall may be separated from the support member 8. Of course, if the width of the support member is large enough, this problem can also be solved, but that will result in a heavier structure and is not conducive to installation. In this embodiment, a keel 2 is installed at the top of the curtain wall, and the keel 2 is connected to the support member 8 through a stay cable 1 to tow the curtain wall.

[0037] Under high - temperature conditions in summer, there is also a problem that the power generation efficiency of the photovoltaic panel is affected due to excessive temperature.

[0038] Therefore, the embodiment of the present invention provides an improvement method.

[0039] Reference Figure 5 , Figure 5 is a partial structural schematic diagram of a photovoltaic curtain wall provided by the embodiment of the present invention. As Figure 5 shown, at the bottom of the glass cover plate 18 of the photovoltaic panel 3, there is an outdoor air inlet 11, and at the top of the glass cover plate 18 of the photovoltaic panel 3, there is an outdoor air outlet 12. An inclined plate 10 is installed obliquely in the internal cavity 9 of the photovoltaic panel 3. The included angle between the inclined plate 10 and the glass cover plate 18 is an acute angle, and the bottom of the inclined plate 10 is close to the outdoor air inlet 11.

[0040] The bottom of the glass cover plate 18 of the photovoltaic panel 3 and the outdoor air inlet 11, as well as the outdoor air outlet 12 provided at the top of the glass cover plate 18 of the photovoltaic panel 3, can directly exchange air with the outside. By adding an inclined partition 10 in the internal cavity 9 of the photovoltaic panel 3, the internal cavity 9 can be used for ventilation and heat dissipation. Since the distance between the partition 10 and the photovoltaic panel 3 gradually decreases, through the Venturi effect, the wind speed gradually increases. Secondly, when the photovoltaic panel 3 operates, it generates heat to heat the air in the internal cavity 9, and the hot air rises due to heat, further intensifying the wind speed by the chimney effect. The hot air climbs along the internal cavity 9 and is discharged to the outside at the top outdoor air outlet 12, thus facilitating ventilation and heat exchange and reducing the influence of excessive temperature on the photovoltaic power generation efficiency.

[0041] Specifically, at the position corresponding to the outdoor air inlet 11 at the bottom of the back plate 19 of the photovoltaic panel 3, a first indoor ventilation opening 13 is opened, and at the position corresponding to the outdoor air outlet 12 at the top of the back plate 19 of the photovoltaic panel 3, a second indoor ventilation opening 15 is opened. In this way, the outdoor air inlet 11, the outdoor air outlet 12, and the indoor can also directly exchange air through the first indoor ventilation opening 13 and the second indoor ventilation opening 15.

[0042] To facilitate the regulation of the indoor temperature, louvers 17 are installed at the outdoor air inlet 11, the outdoor air outlet 12, the first indoor ventilation opening 13, and the second indoor ventilation opening 15. A temperature sensor is installed in the building interior. When it is detected that the indoor temperature exceeds the threshold value, each louver 17 is opened.

[0043] In this embodiment, the louver 17 is connected to a traction rod 14, and the traction rod 14 is connected to a drive assembly 16. The drive assembly 16 drives the traction rod 14 to move along the inclination direction of the photovoltaic panel 3, thereby driving the louver 17 to open and close. In this embodiment, the louver 17 is tightly connected to the traction rod 14 through the connection points at its ends, and the traction rod 14 is further connected to the drive assembly 16 to form a complete linkage system. When the drive assembly 16 is activated, it generates power through the internal mechanical structure, causing the traction rod 14 to move along the inclination direction of the photovoltaic panel 3. Due to the direct connection between the traction rod 14 and the louver 17, the movement of the traction rod 14 directly acts on the louver 17, thereby driving the louver 17 to perform the opening and closing actions according to a predetermined trajectory. It should be understood that the structural composition of the drive assembly may include: a drive motor: The drive motor is the core component of the drive assembly, responsible for converting electrical energy into mechanical energy to drive the traction rod 14 to drive the louver 17 to open and close. The type of motor can be a DC motor, a stepper motor, or an AC motor, and the specific selection depends on the control requirements and costs of the system; a motor controller: The motor controller is used to precisely control the rotation speed, torque, and rotation direction of the motor. It adjusts the output of the motor by receiving external signals (such as light intensity, time, etc.) to ensure that the opening and closing angles of the louver 17 meet the preset requirements; a transmission mechanism: The transmission mechanism is used to convert the rotational motion of the motor into a linear motion to drive the traction rod 14 to move along the inclination direction of the photovoltaic panel 3. Common transmission methods include gear and rack transmission, belt transmission, or ball screw transmission; a sensor (optional): To achieve more intelligent control, the drive assembly 16 can integrate sensors, such as a light intensity sensor, to sense the external light intensity and thereby automatically adjust the opening and closing angles of the louver; a power supply module: The power supply module provides stable power supply for the drive assembly. It can include a DC / DC converter, an energy storage unit (such as a battery), or be directly powered from the photovoltaic panel; a control module: The control module is integrated in the motor controller and is used to receive external signals and process logical instructions, and finally output control signals to the motor. Through the coordinated work of these components, the drive assembly 16 can efficiently control the opening and closing of the louver 17, realize the automatic adjustment of the shading angle of the photovoltaic panel 3, optimize the power generation efficiency, and protect the photovoltaic panel.

[0044] Specifically, when the drive assembly 16 applies power in one direction, the traction rod 14 will move forward along the inclination direction of the photovoltaic panel 3. At this time, the louver 17 will gradually unfold, increasing its shielding area; when the drive assembly 16 changes the direction of power, the traction rod 14 will move in the reverse direction, and the louver 17 will gradually close, reducing the shielding area. In this way, the opening and closing actions of the louver 17 can be precisely controlled according to actual needs, thereby realizing the adjustment of light intensity, optimizing the power generation efficiency of the photovoltaic panel 3, and at the same time protecting the photovoltaic panel 3 from direct sunlight or other adverse environmental factors to a certain extent.

[0045] In this embodiment, the light transmittance and the photoelectric conversion rate of the photovoltaic panel 3 are both 20%, which can not only allow part of the sunlight to penetrate to illuminate the interior, but also effectively absorb the sunlight for power generation.

[0046] Refer again to Figure 5 , the photovoltaic panel 3 and the toughened glass 5 are fixedly connected through the connecting member 4, and the whole is modularly designed, which is convenient for installation and transportation, further reducing the installation cost. Moreover, the toughened glass 5 is hollow toughened glass, which improves the heat insulation performance. At the same time, the surface of the toughened glass 5 is specially treated, which can effectively reduce reflection and glare, making the light entering the interior softer and more uniform.

[0047] Optionally, the support member 8 includes a plurality of I-beams, and the plurality of I-beams are arranged at intervals outside the building exterior wall.

[0048] In this embodiment, a plurality of I-beams are evenly arranged along the building exterior wall, a floor 7 is laid on the floor slab 6, and the I-beams are located outside the floor slab 6 and the floor 7.

[0049] The above are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A photovoltaic curtain wall, characterized in that: include: A support member (8) arranged outside the building exterior wall and a curtain wall body installed on the support member (8), wherein the curtain wall body is arranged tilted as a whole, and the bottom of the curtain wall body is tilted toward one side of the building exterior wall; The curtain wall comprises a plurality of photovoltaic panels (3) and a plurality of tempered glasses (5), wherein the plurality of photovoltaic panels (3) are arranged at equal intervals and tilted in a height direction, the plurality of photovoltaic panels (3) are parallel to each other, a tempered glass (5) is fixed between two adjacent photovoltaic panels (3), and the photovoltaic panels (3) and the tempered glass (5) form a broken line structure; When sunlight irradiates the photovoltaic panel (3), part of the light will be absorbed and converted into electrical energy, while the remaining light will pass through the tempered glass (5) and enter the room through diffuse reflection.

2. The photovoltaic curtain wall according to claim 1, characterized in that: The angle between the curtain wall and the horizontal plane is 72°.

3. The photovoltaic curtain wall according to claim 1, characterized in that: A keel (2) is installed on the top of the curtain wall body, and the keel (2) is connected to the support member (8) via an inclined cable (1) to pull the curtain wall body.

4. The photovoltaic curtain wall according to claim 1, characterized in that: The bottom of the glass cover plate (18) of the photovoltaic panel (3) is provided with an outdoor air inlet (11), and the top of the glass cover plate (18) of the photovoltaic panel (3) is provided with an outdoor air outlet (12). An inclined plate (10) is obliquely installed in the internal chamber (9) of the photovoltaic panel (3), and the angle between the inclined plate (10) and the glass cover plate (18) is an acute angle. The bottom of the inclined plate (10) is close to the outdoor air inlet (11).

5. The photovoltaic curtain wall according to claim 4, characterized in that: A first indoor vent (13) is provided at a position corresponding to the outdoor air inlet (11) at the bottom of the back plate (19) of the photovoltaic panel (3), and a second indoor vent (15) is provided at a position corresponding to the outdoor air outlet (12) at the top of the back plate (19) of the photovoltaic panel (3).

6. The photovoltaic curtain wall according to claim 5, characterized in that: The outdoor air inlet (11), the outdoor air outlet (12), the first indoor ventilation opening (13) and the second indoor ventilation opening (15) are all equipped with shutters (17). A temperature sensor is installed indoors in the building. When the indoor temperature exceeds a threshold value, the shutters (17) are opened.

7. The photovoltaic curtain wall according to claim 6, characterized in that: The shutter (17) is connected to a traction rod (14), and the traction rod (14) is connected to a driving assembly (16). The driving assembly (16) drives the traction rod (14) to move along the tilting direction of the photovoltaic panel (3), thereby driving the shutter (17) to open and close.

8. The photovoltaic curtain wall according to claim 1, characterized in that: The light transmittance and photoelectric conversion efficiency of the photovoltaic panel (3) are both 20%.

9. The photovoltaic curtain wall according to claim 1, characterized in that: The photovoltaic panel (3) and the tempered glass (5) are fixedly connected via a connecting piece (4), and the tempered glass (5) is a hollow tempered glass.

10. The photovoltaic curtain wall according to claim 1, characterized in that: The support member (8) comprises a plurality of I-beams, and the plurality of I-beams are arranged at intervals outside the exterior wall of the building.

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