A building integrated photovoltaic system

Abstract

The application relates to a building integrated photovoltaic system, which comprises a truss, photovoltaic units and a controller, the truss is fixedly connected to the outer facade of a building, the photovoltaic units comprise transparent units and light-blocking units, each photovoltaic unit comprises an assembly frame connected to the truss, the light-blocking unit further comprises a first photovoltaic assembly in the form of a plate embeddedly connected to the assembly frame. The transparent unit further comprises photovoltaic glass embeddedly connected to the assembly frame and a sunshade mechanism. The sunshade mechanism comprises an adjusting assembly and a second photovoltaic assembly rotatably connected to the adjusting assembly, the height of the adjusting assembly is greater than the maximum height of the assembly frame, one end of the second photovoltaic assembly is rotatably connected to the adjusting assembly and can be controllably rotated around the adjusting assembly to block part of sunlight from shining on the photovoltaic glass, and the controller is electrically connected to the first photovoltaic assembly and the second photovoltaic assembly. By combining the transparent units and the light-blocking units and combining the photovoltaic glass and the light-blocking second photovoltaic assembly, the power generation capacity is improved.

Description

Technical Field

[0001] This invention relates to the field of building-integrated photovoltaics (BIPV), and particularly to a BIPV system. Background Technology

[0002] Building-integrated photovoltaics (BIPV) technology combines solar power generation products with buildings, using photovoltaic modules to cover the building's facade, thereby converting excess solar energy into electrical energy. It is green, efficient, and occupies very little space, helping to improve energy utilization.

[0003] When designing and installing building-integrated photovoltaic (BIPV) systems on the exterior facade of a building, the entire structure is usually designed with the same structure. However, because buildings require natural lighting inside, BIPV systems typically need to be installed away from windows and only on the wall surface, which can lead to lower power generation from the BIPV system. Summary of the Invention

[0004] The purpose of this invention is to provide a building-integrated photovoltaic system with high power generation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A building-integrated photovoltaic (BIPV) system includes a truss, several photovoltaic units, and a controller. The truss is fixedly connected to the building facade. The photovoltaic units include two types: transparent units and light-blocking units. Each photovoltaic unit includes a component frame connected to the truss. The component frame is frame-shaped. The light-blocking unit also includes a first photovoltaic module fitted into the component frame. The first photovoltaic module is plate-shaped and conforms to the component frame. The transparent unit also includes photovoltaic glass fitted into and conforms to the component frame. A shading mechanism includes an adjustment component and a second photovoltaic module rotatably connected to the adjustment component. The height of the adjustment component is greater than the maximum height of the component frame. One end of the second photovoltaic module is rotatably connected to the adjustment component and can be controllably rotated around the adjustment component to block some sunlight from shining on the photovoltaic glass. The controller is electrically connected to both the first and second photovoltaic modules.

[0007] Optionally, each of the transparent units and the light-blocking units includes a ventilation mechanism. The component frame has a first horizontal frame and a second horizontal frame, with the second horizontal frame being higher than the first horizontal frame. A plurality of first ventilation openings connecting the inner and outer sides of the component frame are formed on the first horizontal frame, and a plurality of second ventilation openings connecting the inner and outer sides of the component frame are formed on the second horizontal frame. Gas passages are formed on the surfaces of the first photovoltaic module and the photovoltaic glass closest to the building facade, and these gas passages connect the first ventilation openings and the second ventilation openings. The adjustment component includes a support frame and a rotation shaft connected to the truss, and the support frame is hollow. The tubular structure has a rotating opening on its side away from the building facade for the second photovoltaic module to pass through, and several third ventilation openings on its side away from the module frame for connecting to the first ventilation opening of another photovoltaic unit located above it. The rotating shaft is located inside the support frame, and the second photovoltaic module is rotatably connected to the rotating shaft and has a gap between it and the third ventilation openings. The light-blocking unit includes the support frame, which is higher than the module frame. Each ventilation mechanism is located between the module frame and the support frame, connects to the second ventilation opening, and is isolated from the third ventilation opening of the same photovoltaic unit.

[0008] Optionally, the transparent unit further includes low-emissivity glass, which is fitted and connected within the component frame and cooperates with the component frame, and is disposed on the side of the photovoltaic glass near the building facade;

[0009] The light-blocking unit also includes an insulation board, which is embedded in and cooperates with the component frame, and is located on the side of the first photovoltaic module near the building facade.

[0010] Optionally, there is a gap between the low-emissivity glass and the photovoltaic glass, which together with the component frame form the gas passage;

[0011] The insulation board forms several ventilation slots on the surface of the first photovoltaic module, and the ventilation slots and the first photovoltaic module together form the gas passage.

[0012] Optionally, the ventilation mechanism includes a connection portion and a louvered blind connected between the component frame and the support frame of the same photovoltaic unit. The connection portion is adjacent to the edge of the component frame near the building facade, and the louvered blind is adjacent to the edge of the component frame away from the building facade. The louvered blind can be opened or closed in a controllable manner.

[0013] Optionally, the module frame, the connecting part, and the support frame of the same photovoltaic unit are integrally constructed, and the two sides of the module frame, the connecting part, and the support frame are flush in the horizontal direction.

[0014] Optionally, the venetian blind is an electric venetian blind and is electrically connected to the controller.

[0015] Optionally, the building-integrated photovoltaic system further includes a wind pressure sensor, which is disposed on the side of the support frame away from the building facade and above the rotating opening.

[0016] Optionally, the rotating opening of the support frame extends laterally through the support frame, and a first adhesive strip and a second adhesive strip extending toward the inside of the support frame are connected at the vertical edge of the rotating opening. Both the first adhesive strip and the second adhesive strip are flexible structures. The height of the first adhesive strip is higher than that of the second adhesive strip, and the end of the second adhesive strip away from the rotating opening is inclined upwards.

[0017] Optionally, the adjustment component further includes a rotary motor electrically connected to the controller, which drives the second photovoltaic module to rotate controllably around the rotation axis.

[0018] The beneficial effects of this invention are as follows: It provides both transparent and colored modules to meet different lighting needs of buildings. The colored module, constructed with an opaque first photovoltaic module, has a high photoelectric conversion efficiency. The transparent module, constructed with photovoltaic glass, not only provides lighting but also converts solar energy into electrical energy. The installation of a shading mechanism with photoelectric conversion capabilities achieves multiple goals: glare prevention, energy saving for air conditioning, and increased overall building photovoltaic power generation. The modular design of the building-integrated photovoltaic system allows for the standardized production of multiple transparent and colored modules, which are then easily assembled at the construction site to form the building-integrated photovoltaic system. Improving the quality of each unit enhances the overall quality of the building-integrated photovoltaic system, while reducing transportation and construction difficulties, increasing construction efficiency, and lowering production costs.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the building-integrated photovoltaic system shown in Embodiment 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the transparent unit and part of the truss shown in Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the component frame and internal structure of the transparent unit shown in Embodiment 1 of the present invention;

[0023] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 5 This is a schematic diagram of the component frame and internal structure of the light-blocking unit shown in Embodiment 1 of the present invention.

[0025] Legend: 1-truss, 2-transparent unit, 21-component frame, 211-first horizontal frame, 212-first vent, 213-second horizontal frame, 214-second vent, 22-photovoltaic glass, 23-low-emissivity glass, 24-shading mechanism, 25-adjustment component, 251-support frame, 252-rotating opening, 253-third vent, 254-rotating shaft, 255-first extension, 256-second extension, 257-first adhesive strip, 258-second adhesive strip, 26-second photovoltaic module, 27-ventilation mechanism, 271-connecting part, 272-vested blind, 28-wind pressure sensor, 29-lighting module, 3-light blocking unit, 31-first photovoltaic module, 32-insulation board, 321-ventilation slot. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] This invention application protects a building-integrated photovoltaic (BIPV) system, including a truss 1, several photovoltaic units, and a controller. The truss 1 is fixedly connected to the exterior facade of the building. The photovoltaic units include two types: transparent units 2 and light-blocking units 3. Each photovoltaic unit includes a component frame 21 connected to the truss 1. The component frame 21 is frame-shaped. The light-blocking unit 3 also includes a first photovoltaic module 31 fitted and connected within the component frame 21. The first photovoltaic module 31 is plate-shaped and its shape matches the component frame 21. The transparent unit 2 also includes a photovoltaic glass 22 fitted and connected within the component frame 21 and matching the component frame 21. The shading mechanism 24 includes an adjustment component 25 and a second photovoltaic module 26 rotatably connected to the adjustment component 25. The height of the adjustment component 25 is greater than the maximum height of the component frame 21. One end of the second photovoltaic module 26 is rotatably connected to the adjustment component 25 and can be controllably rotated around the adjustment component 25 to block some sunlight from shining on the photovoltaic glass 22. The controller is electrically connected to both the first photovoltaic module 31 and the second photovoltaic module 26.

[0031] Two types of modules, transparent and colored, are used to meet different lighting needs of buildings. The colored module is constructed using an opaque first photovoltaic module 31, which has a high photoelectric conversion efficiency. The transparent module is constructed using photovoltaic glass 22, enabling it to convert solar energy into electrical energy. A second photovoltaic module 26 with photoelectric conversion capability is used to block and convert solar energy before it reaches the transparent module, helping to increase the power generation of the building-integrated photovoltaic system (BIPV). The BIPV system is modularly designed, with standardized production of multiple transparent and colored modules. These modules are then easily assembled at the construction site to form the BIPV system. By improving the quality of each unit, the overall quality of the BIPV system is improved, while transportation and construction difficulties are reduced, construction efficiency is increased, and production costs are lowered. Furthermore, modular construction offers high flexibility and can accommodate various architectural design requirements.

[0032] In some embodiments, each transparent unit 2 and light-blocking unit 3 includes a ventilation mechanism 27. The component frame 21 has a first horizontal frame 211 and a second horizontal frame 213, and the height of the second horizontal frame 213 is higher than that of the first horizontal frame 211. A plurality of first ventilation openings 212 connecting the inner and outer sides of the component frame 21 are formed on the first horizontal frame 211, and a plurality of second ventilation openings 214 connecting the inner and outer sides of the component frame 21 are formed on the second horizontal frame 213. Gas passages are formed on the surface of the first photovoltaic module 31 and the photovoltaic glass 22 near the building facade. The gas passages are used to connect the first ventilation openings 212 and the second ventilation openings 214. The adjustment component 25 includes a support frame 251 connected to the truss 1 and a rotation shaft 254. 251 is constructed as a hollow tubular structure, with a rotating opening 252 formed on its side away from the building facade for the second photovoltaic module 26 to pass through, and several third ventilation openings 253 formed on its side away from the module frame 21 for connecting to the first ventilation opening 212 of another photovoltaic unit located above it. The rotating shaft 254 is located inside the support frame 251, and the second photovoltaic module 26 is rotatably connected to the rotating shaft 254 and has a gap between it and the third ventilation openings 253. The light-blocking unit 3 includes a support frame 251 with a height higher than the module frame 21. Each ventilation mechanism 27 is located between the module frame 21 and the support frame 251, connected to the second ventilation opening 214, and isolated from the third ventilation opening 253 of the same photovoltaic unit.

[0033] Gas can pass through the interior of the component frame 21 via the first vent 212, the gas passage, and the second vent 214. Hot air rises continuously under thermal pressure, forming an airflow. It enters the support frame 251 of the lower photovoltaic unit through the rotating opening 252, then enters the first vent 212 of the upper photovoltaic unit through the third vent 253 of the support frame 251, and exits through the second vent 214 and then through the ventilation mechanism 27. This achieves ventilation for the building-integrated photovoltaic system, facilitating heat transfer to prevent overheating of the first photovoltaic module 31 or photovoltaic glass 22, thereby improving the lifespan of the building-integrated photovoltaic system and reducing safety risks. When the lower component is a transparent component, i.e., with a downward-sloping second photovoltaic module 26, the second photovoltaic module 26 can act as a guide, helping to promote gas flow. In addition, this structure also facilitates drainage of the system.

[0034] In some embodiments, the transparent unit 2 further includes low-emissivity glass 23, which is fitted and connected within the component frame 21 and cooperates with the component frame 21, and is disposed on the side of the photovoltaic glass 22 near the building facade;

[0035] The light-blocking unit 3 also includes an insulation board 32, which is fitted and connected inside the component frame 21 and cooperates with the component frame 21, and is located on the side of the first photovoltaic module 31 near the building facade.

[0036] By incorporating low-emissivity glass 23 and insulation board 32, the thermal insulation capabilities of both transparent and colored modules are improved, thereby providing thermal insulation and sound insulation for the interior of the building.

[0037] In some embodiments, there is a gap between the low-emissivity glass 23 and the photovoltaic glass 22, which together with the component frame 21 form a gas passage.

[0038] Several ventilation slots 321 are formed on the surface of the insulation board 32 near the first photovoltaic module 31. The ventilation slots 321 and the first photovoltaic module 31 together form a gas passage.

[0039] In some embodiments, the ventilation mechanism 27 includes a connection portion 271 and a venetian blind 272 connected between the component frame 21 and the support frame 251 of the same photovoltaic unit. The connection portion 271 is adjacent to the edge of the component frame 21 near the building facade, and the venetian blind 272 is adjacent to the edge of the component frame 21 away from the building facade. The venetian blind 272 can be opened or closed in a controllable manner.

[0040] When the outside temperature is high, such as in summer, the venetian blinds 272 are opened to connect the internal and external environments of the building-integrated photovoltaic system, thereby facilitating heat dissipation and preventing heat buildup inside the module frame 21, which could damage the first photovoltaic module 31 or the photovoltaic glass 22. When the outside temperature is low, such as in winter, the venetian blinds 272 are closed. At this time, air circulation is obstructed, and heat is difficult to dissipate with the airflow, thus preventing it from accumulating inside the module frame 21, which helps improve the overall thermal insulation performance of the building.

[0041] In some embodiments, the module frame 21, connecting portion 271, and support frame 251 of the same photovoltaic unit are integrally constructed, and the two side edges of the module frame 21, connecting portion 271, and support frame 251 are flush in the horizontal direction. Integrating the frame structure of the same photovoltaic unit helps to improve the overall strength of each module.

[0042] In some embodiments, the Venetian blind 272 is an electric Venetian blind, electrically connected to the controller for easy adjustment.

[0043] In some embodiments, the building-integrated photovoltaic system further includes a wind pressure sensor 28, which is disposed on the side of the support frame 251 away from the building facade and above the rotating opening 252. The wind pressure sensor 28 senses the wind pressure experienced by the building-integrated photovoltaic system. When the wind pressure is too high, adjusting and reducing the angle between the shading component and the photovoltaic glass 22 helps to improve wind resistance.

[0044] In some embodiments, the rotation opening 252 of the support frame 251 extends laterally through the support frame 251. A first adhesive strip 257 and a second adhesive strip 258 extending towards the inside of the support frame 251 are connected to the vertical edge of the rotation opening 252. Both the first adhesive strip 257 and the second adhesive strip 258 are flexible structures. The height of the first adhesive strip 257 is higher than that of the second adhesive strip 258, and the end of the second adhesive strip 258 away from the rotation opening 252 is inclined upwards. The flexible first adhesive strip 257 and the second adhesive strip 258 act as a buffer, preventing the second photovoltaic module 26 from directly impacting the rigid support member, thus helping to protect the second photovoltaic module 26.

[0045] In some embodiments, the adjustment component 25 further includes a rotary motor electrically connected to the controller, which drives the second photovoltaic module 26 to rotate controllably around the rotation axis 254, so as to adjust the tilt angle of the second photovoltaic module 26 as needed, thereby adjusting the corresponding indoor lighting conditions of the building.

[0046] Please refer to the following examples for details.

[0047] Example 1:

[0048] Please see Figure 1 and Figure 2 The building-integrated photovoltaic (BIPV) system shown in a preferred embodiment of this application includes a truss 1, multiple arrayed photovoltaic (PV) units, and a controller. Multiple vertically extending trusses 1 are evenly arranged horizontally and fixedly connected to the building facade. Multiple vertically arranged and interconnected PV units form a column, and two horizontally arranged and interconnected columns of PV units connect adjacent trusses 1, ensuring that each PV unit is directly connected to a single truss 1, thereby guaranteeing the overall strength of the BIPV system. The PV units include two types: transparent units 2 and light-blocking units 3. Both transparent units 2 and light-blocking units 3 include a frame structure integrally formed by a component frame 21, a connecting portion 271, and a support frame 251. The frame structure is rectangular, with the horizontally positioned support frame 251 located above the rectangular component frame 21. The connecting portion 271 connects the support frame 251 and the component frame 21, and the sides of all three near the building facade are flush with each other. The transparent unit 2 and the light-blocking unit 3 are built with the same frame structure and connected to the truss 1 for modular construction. This allows for flexible assembly of different types of photovoltaic units to adapt to different building appearance designs. It also reduces the difficulty of production and installation of photovoltaic units, thereby reducing the production cost of the building-integrated photovoltaic system and improving the construction efficiency.

[0049] Please see Figure 3The component frame 21 is constructed as a closed rectangle enclosed by rectangular tubes, including a first horizontal frame 211 and a second horizontal frame 213 extending horizontally, with the second horizontal frame 213 being higher than the first horizontal frame 211. The first horizontal frame 211 has a plurality of rectangular through-holes evenly arranged vertically, named first vents 212. The second horizontal frame 213 has a plurality of second vents 214 with the same structure as the first vents 212, corresponding to the positions of the first vents 212. When the photovoltaic unit is a transparent unit 2, the photovoltaic glass 22, shaped to fit the component frame 21, is embedded and connected inside the component frame 21, adjacent to the edge of the component frame 21 away from the building facade. Multiple layers of stacked low-emissivity glass 23 are embedded and connected inside the component frame 21, located on the side of the photovoltaic glass 22 closest to the building facade. The photovoltaic glass 22 and the low-emissivity glass 23 are separated to form cavities, thereby creating a gas passage connecting the first vents 212 and the second vents 214. The low-emissivity glass 23 with its multi-layered structure helps improve the building's thermal insulation performance. The photovoltaic glass 22 is electrically connected to a controller to convert the received light energy into electrical energy.

[0050] Please see Figure 2 and Figure 4The transparent unit 2 also includes a shading mechanism 24, which includes an adjustment component 25 and a second photovoltaic module 26 connected to the adjustment component 25. The adjustment component 25 includes the aforementioned support frame 251, a rotating shaft 254 connected to the support frame 251, and a rotating motor. The support frame 251 is a hollow rectangular tube with a third ventilation opening 253 at its top corresponding to the first ventilation opening 212, and a horizontally extending, elongated rotating opening 252 at the center of its side away from the building facade. The rotating opening 252 extends horizontally through the support frame 251, connecting the inner and outer sides of the support frame 251. The rotating shaft 254 is horizontally positioned inside the support frame 251 and fixedly connected to the side of the support frame 251 opposite to the rotating opening 252, with a height slightly higher than the upper edge of the rotating opening 252. The second photovoltaic module 26 is a rectangular plate with its two horizontal edges flush with the support frame 251, and one end rotatably connected to the rotating shaft 254. The second photovoltaic module 26 is an opaque photovoltaic structure. Its side away from the module frame 21 converts received light energy into electrical energy and is electrically connected to the controller. Due to the relative spatial position of the rotating shaft 254 and the rotating opening 252, the second photovoltaic module 26 maintains a downward tilt with a fixed adjustable tilt angle. This causes the second photovoltaic module 26 to block some of the light that would otherwise illuminate the photovoltaic glass 22, converting it into electrical energy. The photovoltaic glass 22 then converts some of the received light energy into electrical energy, significantly reducing the light intensity transmitted through the low-emissivity glass 23 and converting the blocked light energy into electrical energy, thus obtaining more electrical energy while ensuring sufficient light intake. A rotary motor is connected between the second photovoltaic module 26 and the rotating shaft 254 and is electrically connected to the controller for controllably adjusting the tilt angle of the second photovoltaic module 26.

[0051] The upper and lower edges of the rotating opening 252 extend inward toward the support frame 251, forming a first extension 255 at the top and a second extension 256 at the bottom, respectively. Both the first extension 255 and the second extension 256 are inclined upward toward the inner side of the rotating opening 252. A long strip of first adhesive 257 is attached to the side of the first extension 255 near the second extension 256, and a long strip of second adhesive 258 is attached to the side of the second extension 256 near the first extension 255. Both the first adhesive strip 257 and the second adhesive strip 258 are flexible structures with good elasticity. When the second photovoltaic module 26 comes into contact with the upper and lower edges of the rotating opening 252, it is parallel to and in close contact with the first extension 255 and the second extension 256, respectively. The first adhesive strip 257 and the second adhesive strip 258 help reduce the impact of the collision and prevent damage to the second photovoltaic module 26.

[0052] The transparent unit 2 also includes a ventilation mechanism 27, which includes the aforementioned connecting portion 271 and a venetian blind 272. The venetian blind 272 is connected between the component frame 21 and the support frame 251, and is located near the edge of the component frame 21 away from the building facade, so that a chamber communicating with the second ventilation opening 214 is formed between the connecting portion 271 and the venetian blind 272. In this embodiment, the venetian blind 272 is an electric venetian blind, electrically connected to a controller and controllably opened and closed. Since a third ventilation opening 253 is provided at the top of the support frame 251, the interior of the photovoltaic unit's support frame 251 can be connected to the ventilation mechanism 27 of the upper photovoltaic unit through the third ventilation opening 253, and the first ventilation opening 212 and the second ventilation opening 214 of another photovoltaic unit above it.

[0053] When the outside temperature is high, such as in summer, opening the venetian blinds 272 allows hot air to flow upwards under the influence of wind and thermal pressure. After entering the support frame 251 of the lower photovoltaic unit, the air flows sequentially through the third vent 253, the first vent 212, and the second vent 214, exiting through the open venetian blinds 272. This helps dissipate heat and prevents heat buildup inside the module frame 21, which would reduce the photoelectric conversion efficiency of the photovoltaic glass 22 and consequently decrease the discharge rate. When the outside temperature is low, such as in winter, closing the venetian blinds 272 obstructs airflow, making it difficult for heat to dissipate with the airflow and causing it to accumulate inside the module frame 21. This helps improve the overall thermal insulation performance of the building. The aforementioned pathways can also be used for liquid drainage, aiding in the drainage of the building-integrated photovoltaic system. When the lower photovoltaic unit is a transparent unit, the second photovoltaic module 26 acts as a guide.

[0054] The transparent unit 2 in this embodiment also includes a wind pressure sensor 28. The wind pressure sensor 28 is installed on the side of the support frame 251 away from the building facade and is located above the rotating opening 252, and is electrically connected to the controller. When excessive wind pressure is sensed, the controller controls the second photovoltaic module 26 to rotate towards the photovoltaic glass 22, and the venetian blind 272 closes. This prevents damage to the second photovoltaic module 26, reduces the direct impact on the photovoltaic glass 22, and also prevents damage to the venetian blind 272 and the building-integrated photovoltaic system due to excessive internal wind pressure, thus helping to improve the wind resistance of the building-integrated photovoltaic system.

[0055] The transparent unit 2 in this embodiment also includes a lighting module 29. The lighting module 29 is a long strip of floodlight tube, installed inside the support frame 251 and horizontally positioned above the rotating shaft 254 and electrically connected to the controller. This integrated design not only provides floodlighting at night but also optimizes the wiring layout, ensuring the visual integrity of the building facade.

[0056] In this embodiment, the second photovoltaic module 26 and the photovoltaic glass 22 are both adjacent to the ventilation mechanism 27 vertically, and the rotary motor, wind pressure sensor 28 and lighting module 29 that need to be wired and electrically connected to the controller are all adjacent to the ventilation mechanism 27, realizing the integrated design of equipment and pipelines, which facilitates unified maintenance and wiring, and saves pipeline materials.

[0057] Please see Figure 1 and Figure 5 The only difference between the light-blocking unit 3 and the transparent unit 2 is that the light-blocking unit 3 does not have a rotating shaft 254 and a second photovoltaic module 26, and the internal structure of the module frame 21 is different. When the photovoltaic unit is the light-blocking unit 3, the first photovoltaic module 31, which is shaped to fit the module frame 21, is embedded and connected inside the module frame 21, and is located near the edge of the module frame 21 away from the building facade. The insulation board 32 is embedded and connected inside the module frame 21, and is located on the side of the first photovoltaic module 31 closer to the building facade. Multiple rectangular ventilation slots 321 are formed on the insulation board 32. The ventilation slots 321 extend vertically and penetrate the insulation board 32, and are used to connect the oppositely arranged first ventilation opening 212 and second ventilation opening 214 to form a gas passage.

[0058] In this embodiment, the building-integrated photovoltaic system also includes multiple displays electrically connected to the controller. Each display corresponds one-to-one with each transparent unit 2 and is installed in the building interior corresponding to each transparent unit 2. In this embodiment, the tilt angle of the second photovoltaic module 26 varies seasonally and is adjusted regularly according to different seasons. It can also be actively adjusted by the displays installed in the building interior to meet the lighting requirements. In other embodiments, other sensors can be set up to adjust the tilt angle of the second photovoltaic module 26 according to different conditions.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A building-integrated photovoltaic system, characterized in that, The system includes a truss (1), several photovoltaic units, and a controller. The truss (1) is fixedly connected to the exterior facade of the building. The photovoltaic units include two types: transparent units (2) and light-blocking units (3). Each photovoltaic unit includes a component frame (21) connected to the truss (1). The component frame (21) is frame-shaped. The light-blocking unit (3) also includes a first photovoltaic module (31) fitted into the component frame (21). The first photovoltaic module (31) is plate-shaped and its shape matches the component frame (21). The transparent unit (2) also includes a component fitted into the component frame (21) and its shape matches the component frame (21). The photovoltaic glass (22) of the component frame (21) and the shading mechanism (24) include an adjustment component (25) and a second photovoltaic module (26) rotatably connected to the adjustment component (25). The height of the adjustment component (25) is greater than the maximum height of the component frame (21). One end of the second photovoltaic module (26) is rotatably connected to the adjustment component (25) and can be controllably rotated around the adjustment component (25) to block part of the sunlight from shining on the photovoltaic glass (22). The controller is electrically connected to both the first photovoltaic module (31) and the second photovoltaic module (26). Each of the transparent units (2) and the light-blocking units (3) includes a ventilation mechanism (27). The component frame (21) has a first horizontal frame (211) and a second horizontal frame (213), and the height of the second horizontal frame (213) is higher than that of the first horizontal frame (211). A plurality of first ventilation openings (212) connecting the inner and outer sides of the component frame (21) are formed on the first horizontal frame (211), and a plurality of second ventilation openings (214) connecting the inner and outer sides of the component frame (21) are formed on the second horizontal frame (213). Gas passages are formed on the surface of the first photovoltaic module (31) and the photovoltaic glass (22) near the building facade. The gas passages are used to connect the first ventilation openings (212) and the second ventilation openings (214). The adjustment component (25) includes a support frame (251) and a rotating shaft (254) connected to the truss (1). The support frame (251) 51) Constructed as a hollow tubular structure, with a rotating opening (252) formed on the side away from the building facade for the second photovoltaic module (26) to pass through, and a plurality of third ventilation openings (253) formed on the side away from the module frame (21) for connecting to the first ventilation opening (212) of another photovoltaic unit located above it. The rotating shaft (254) is located inside the support frame (251), and the second photovoltaic module (26) is rotatably connected to the rotating shaft (254) and has a gap with the third ventilation opening (253). The light-blocking unit (3) includes the support frame (251) which is higher than the module frame (21). Each ventilation mechanism (27) is located between the module frame (21) and the support frame (251), connected to the second ventilation opening (214), and isolated from the third ventilation opening (253) of the same photovoltaic unit. The transparent unit (2) also includes low-emissivity glass (23), which is fitted and connected within the component frame (21) and cooperates with the component frame (21), and is disposed on the side of the photovoltaic glass (22) near the building facade; The light-blocking unit (3) also includes a heat insulation board (32), which is fitted and connected inside the component frame (21) and cooperates with the component frame (21), and is located on the side of the first photovoltaic module (31) near the building facade; There is a gap between the low-emissivity glass (23) and the photovoltaic glass (22), which together with the component frame (21) form the gas passage; The insulation board (32) forms several ventilation grooves (321) on the surface near the first photovoltaic module (31), and the ventilation grooves (321) and the first photovoltaic module (31) together form the gas passage.

2. The building-integrated photovoltaic system as described in claim 1, characterized in that, The ventilation mechanism (27) includes a connection (271) and a venetian blind (272) connected between the component frame (21) and the support frame (251) of the same photovoltaic unit. The connection (271) is adjacent to the component frame (21) near the edge of the building facade, and the venetian blind (272) is adjacent to the component frame (21) away from the edge of the building facade. The venetian blind (272) can be opened or closed in a controllable manner.

3. The building-integrated photovoltaic system as described in claim 2, characterized in that, The module frame (21), the connecting part (271) and the support frame (251) of the same photovoltaic unit are integrally constructed, and the two sides of the module frame (21), the connecting part (271) and the support frame (251) are flush in the horizontal direction.

4. The building-integrated photovoltaic system as described in claim 2, characterized in that, The venetian blind (272) is an electric venetian blind and is electrically connected to the controller.

5. The building-integrated photovoltaic system as described in claim 1, characterized in that, It also includes a wind pressure sensor (28), which is disposed on the side of the support frame (251) away from the building facade and above the rotating opening (252).

6. The building-integrated photovoltaic system as described in claim 1, characterized in that, The rotating opening (252) of the support frame (251) extends horizontally through the support frame (251). A first adhesive strip (257) and a second adhesive strip (258) extending toward the inside of the support frame (251) are connected at the edge of the rotating opening (252) in the vertical direction. Both the first adhesive strip (257) and the second adhesive strip (258) are flexible structures. The height of the first adhesive strip (257) is higher than that of the second adhesive strip (258), and the end of the second adhesive strip (258) away from the rotating opening (252) is inclined upwards.

7. The building-integrated photovoltaic system as described in claim 1, characterized in that, The adjustment component (25) also includes a rotary motor, which is electrically connected to the controller and drives the second photovoltaic module (26) to rotate controllably around the rotation axis (254).

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