A photovoltaic building integrated cooling device

Abstract

The application discloses a photovoltaic building integrated cooling equipment in the field of photovoltaic technology, which comprises a photovoltaic module and a spraying assembly, and further comprises guide rails symmetrically arranged on both sides of the photovoltaic module, a water collecting assembly is arranged across the surface of the photovoltaic module and comprises a water collecting baffle and a water guide pipe connected to the end of the water collecting baffle, and the water guide pipe is rotationally connected with the guide rail; a driving assembly is installed on the guide rail and used for driving the water guide pipe to rotate and switch between a storage mode and an interception mode; a spraying assembly is communicatively arranged at the end of the water guide pipe, water accumulated in the water collecting baffle is transported to the spraying assembly through the water guide pipe under the action of a gravity head, and is converted into dispersed mist droplets to be sprayed to the surrounding area of the photovoltaic module, and the application solves the problems of low functional integration, insufficient utilization of cooling water and easy leakage of roof water seepage of the existing photovoltaic cooling equipment, and simultaneously, the problems of difficult consideration of the efficiency improvement of the photovoltaic module and the environmental cooling of the roof of the building.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and in particular to a building-integrated photovoltaic cooling device. Background Technology

[0002] Building-integrated photovoltaics (BIPV) is a crucial pathway to achieving green building and energy transition. In practical applications, the power generation efficiency of photovoltaic modules is closely related to operating temperature; typically, the output power of photovoltaic cells decreases significantly as temperature rises. Furthermore, the building roof, as the primary load-bearing surface for photovoltaic panels, not only affects the power generation efficiency of the panels but also directly impacts indoor air conditioning energy consumption. Therefore, when installing photovoltaic systems on building roofs, how to integrate methods to cool photovoltaic modules and simultaneously improve the microclimate environment of the building roof has become key to enhancing the overall benefits of BIPV systems.

[0003] However, existing photovoltaic cooling technologies have many drawbacks in practical applications. First, traditional spray cooling methods often use high-flow-rate water for direct flushing. While this can achieve a cooling effect, it easily leads to large-area water accumulation on building roofs, wasting water resources and increasing the risk of roof structure leaks. Second, existing equipment often has limited functionality, and cleaning and cooling systems are usually incompatible, resulting in complex installation and high maintenance costs. Finally, existing cooling systems do not fully utilize the treated water, leading to rapid and uneven water loss, making it difficult to effectively cool the overall environment of the building roof. Therefore, those skilled in the art have developed a building-integrated photovoltaic (BIPV) cooling device to address the problems mentioned in the background. Summary of the Invention

[0004] The purpose of this invention is to address the problems of low functional integration, insufficient cooling water utilization, and easy roof water accumulation and leakage in existing photovoltaic cooling equipment, while also making it difficult to simultaneously improve the efficiency of photovoltaic modules and cool the building roof environment. Therefore, this invention proposes a photovoltaic building integrated cooling equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a building-integrated photovoltaic (BIPV) cooling device, comprising a photovoltaic module and a spraying assembly installed on top of the photovoltaic module, and further comprising: Guide rails are symmetrically arranged on both sides of the photovoltaic module; A water collection component is disposed across the surface of the photovoltaic module, including a water collection baffle and a water guide pipe connected to the end of the water collection baffle, the water guide pipe being rotatably connected to a guide rail; A drive component, mounted on the guide rail, is used to drive the water guide pipe to rotate and switch the water collection baffle between the collection mode and the interception mode. A spray assembly is connected to the end of the water guide pipe. The water flow accumulated in the water collection baffle is transported to the spray assembly through the water guide pipe under the action of gravity pressure head, and is converted into diffused mist droplets and sprayed to the area around the photovoltaic module.

[0006] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling equipment: The water collection baffle includes a first baffle and a second baffle. The outer ends of the first baffle and the second baffle are each connected to a set of water guide pipes, and their inner free ends abut against each other on the top surface of the photovoltaic module to jointly form a complete water collection chamber spanning the surface of the photovoltaic module.

[0007] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling equipment: The first baffle has a shallow groove cross-section, and the second baffle has a deep groove cross-section. In the interception mode, the inner free end of the first baffle is nested inside the inner free end of the second baffle to form an overlapping section in which the grooves envelop each other.

[0008] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling equipment: The second baffle is connected to the water guide pipe at one end, which is the output end. The end of the water guide pipe at the output end is equipped with a spray assembly. The first baffle is connected to the water guide pipe at one end, which is the closed end. The end of the water guide pipe or the first baffle at the closed end is in a blocked state.

[0009] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling equipment: The second baffle has a horizontally extending partition strip in its water collection chamber, which divides the space inside the second baffle into a water-facing space and a water-returning space. The water-facing side of the partition strip is equipped with a filter strip, and the water guide pipe is connected to the water-returning space.

[0010] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling equipment: Both the first and second baffles have scrapers on the side facing the photovoltaic module surface that abut against them.

[0011] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling equipment: The overflow edge of the first baffle is flush with the overflow edge of the second baffle.

[0012] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling device: The drive assembly includes a drive component fixedly mounted on the top of the photovoltaic module and a driven wheel mounted on the bottom of the photovoltaic module. The output end of the drive component is connected to the driven wheel via a transmission belt, and the transmission belt is provided with a connecting component for driving the water pipe to rotate synchronously.

[0013] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling equipment: The connector includes a slider that is slidably mounted on a guide rail. The slider is fixedly connected to a transmission belt. A roller is provided at the bottom of the slider. A rotating rod is fixed on the water guide pipe. A limiting groove is provided on the rotating rod for the roller to be inserted and reciprocate.

[0014] As a further description of the aforementioned building-integrated photovoltaic (BIPV) cooling equipment: The spray assembly includes a branch air pipe fixedly installed at the bottom of the guide rail, with multiple sets of atomizing nozzles connected to the branch air pipe. The atomizing nozzles are connected to the water guide pipe at the end of the second baffle, and the branch air pipe is also connected to the main air supply pipe.

[0015] In summary, due to the adoption of the above-mentioned photovoltaic building-integrated cooling device, the beneficial effects of this invention are: By combining water collection baffles with drive components, the cooling water source on the photovoltaic panel surface can be selectively intercepted and diverted. Multiple sets of parallel water collection baffles on the top of the photovoltaic panel allow the same water source to first overflow from the top to form a uniformly covered cooling liquid curtain to cool the photovoltaic panel surface, and then be transformed into diffused mist droplets through conduits to cool the surrounding microenvironment. The extremely fine mist droplets have a larger specific surface area and evaporate very quickly in the air. Compared with the direct loss of water by traditional spraying, the water source is utilized in two stages, which can not only improve the overall cooling effect of photovoltaic building integrated facilities, but also avoid the large amount of water accumulating on the top of the building after use, causing building leakage. Moreover, there is no need to install additional water pumps or other power equipment. The directional delivery and atomization spraying of water can be achieved by relying on gravity pressure head, which effectively reduces the operating energy consumption and maintenance costs of the equipment. Furthermore, the drive component can drive the water collection baffle to perform a fan-shaped reciprocating motion. At the beginning of the equipment startup, the baffle, together with the water flow falling from the top spray component, produces a physical sweeping effect similar to a windshield wiper. Utilizing the initial water flow impact and the disturbance at the edge of the baffle, it can quickly loosen and wash away the dried dust, bird droppings, or contaminants accumulated on the surface of the photovoltaic panel. The reciprocating motion allows the cooling water to cover the entire panel surface in a short time, avoiding the thermal stress impact that may occur when the dry, high-temperature glass comes into direct contact with the still, cold water flow. After the water supply stops, the drive component controls the baffle to perform a fan-shaped reciprocating motion again, forcibly guiding large droplets or accumulated water remaining on the surface of the photovoltaic panel, preventing them from leaving mineral scale after natural evaporation. The convex lens focusing effect of the residual water droplets under sunlight is also eliminated. In the long run, this also helps to maintain the cleanliness and light transmittance of the panel surface, improving the power generation efficiency and service life of the photovoltaic structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the present invention; Figure 3 This is a first schematic diagram of the structure of the water collection component, the driving component, and the spray component of the present invention; Figure 4 This is a second schematic diagram of the structure of the water collection component, driving component, and spray component of the present invention; Figure 5 This is a first cross-sectional view of the water collection component structure of the present invention; Figure 6 This is a second cross-sectional view of the water collection component structure of the present invention; Figure 7 for Figure 4 Enlarged view of the A-structure in the middle; Figure 8 for Figure 5 Enlarged view of the B structure.

[0017] Legend: 10. Photovoltaic modules; 11. Spraying modules; 12. Guide rails; 13. Separators; 14. Filter strips; 15. Scrapers; 16. Limiting grooves; 17. Water-facing side space; 18. Water-returning side space; 20. Water collection assembly; 201. Water collection baffle; 2011. First baffle; 2012. Second baffle; 202. Water guide pipe; 30. Drive assembly; 301. Drive component; 302. Driven wheel; 303. Transmission belt; 304. Connector; 3041. Slider; 3042. Roller; 3043. Rotating rod; 40. Spray assembly; 401. Branch air pipe; 402. Atomizing nozzle; 403. Main gas supply pipe. Detailed Implementation

[0018] The following will describe a photovoltaic building-integrated cooling device according to the embodiments of the present invention clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0019] like Figures 1-8 As shown, the present invention provides a building-integrated photovoltaic (BIPV) cooling device, comprising a photovoltaic module 10 and a spraying assembly 11 installed on top of the photovoltaic module 10, as shown. Figure 1The photovoltaic module 10 shown has a width direction that is horizontal and a length direction that is vertical. The length direction of the photovoltaic module 10 is also its tilt direction. The cooling device also includes structures such as guide rail 12, water collection component 20, drive component 30 and spray component 40. The guide rail 12 is symmetrically arranged on both sides of the photovoltaic module 10. Multiple sets of water collection components 20 are arranged across the surface of the photovoltaic module 10. Each water collection component 20 includes a water collection baffle 201 and a water guide pipe 202 connected to the end of the water collection baffle 201. The water guide pipe 202 is rotatably connected to the guide rail 12. The drive component 30 is installed on the guide rail 12 and is used to drive the water guide pipe 202 to rotate and switch the water collection baffle 201 between the collection mode and the interception mode. The spray component 40 is connected to the end of the water guide pipe 202. The water flow accumulated in the water collection baffle 201 is transported to the spray component 40 through the water guide pipe 202 under the action of gravity pressure head, and is converted into diffused mist droplets and sprayed to the surrounding area of ​​the photovoltaic module 10.

[0020] The water collection baffle 201 can be composed of a linear overflow weir and a base drain outlet. The linear overflow weir is formed by the top overflow edge of the water collection baffle 201 facing the downward slope of the photovoltaic module 10. When the liquid level accumulated in the water collection baffle 201 reaches the threshold, the liquid overflows along the linear overflow weir to form a uniformly covered cooling liquid curtain on the surface of the photovoltaic module 10 below. The base drain outlet is opened below the water collection chamber and is connected to the water guide pipe 202. The flow capacity of the base drain outlet is less than the water inlet load of the water collection chamber to maintain the water collection chamber in a full overflow state and guide part of the liquid flow to be discharged directionally through the water guide pipe 202.

[0021] When the drive component 30 is activated, it moves along the guide rail 12, which can drive the water pipe 202 and the water collection baffle 201 to rotate. The water collection baffle 201 rotates to fit or approach the light-receiving surface of the photovoltaic module 10, which can intercept the cooling water sprayed down from the top spray component 11. When cooling is not required or the surface needs to be cleaned, the water collection baffle 201 rotates to avoid the side of the photovoltaic module 10, which can prevent the photovoltaic module 10 from being blocked during daily use.

[0022] Each layer of water collection components 20 can divide the water flow into two parts for treatment. When the water level in the chamber of the water collection baffle 201 reaches the threshold, the water flows out evenly from the top edge of the water collection baffle 201. Due to gravity and the water distribution effect of the baffle, the overflowing water flows out in a uniform and continuous cooling liquid curtain in the downward slope direction of the photovoltaic panel. This helps to avoid overheating areas caused by the lack of coverage in local water flow in ordinary spraying. The water accumulated at the bottom of the inner cavity of the water collection baffle 201 enters the water guide pipe 202 through the base drain port. Utilizing the height difference between the water collection position and the end spray component 40, the water flow is transformed into diffused droplets at the end through the spray component 40. These droplets evaporate rapidly in the air around the photovoltaic module 10, absorbing ambient heat and reducing the micro-environmental temperature of the photovoltaic building from the outside. The same water source first cools the surface of the photovoltaic panel through overflow, and then is transported through the conduit to cool the surrounding environment. Compared with the direct loss after traditional spraying, this can not only improve the cooling effect of the photovoltaic building integrated facility, but also avoid the large accumulation of water on the top of the building after use, which can cause building leakage.

[0023] In one embodiment, such as Figures 1-6 As shown, the water collection baffle 201 can be a split structure, including a first baffle 2011 and a second baffle 2012. The outer ends of the first baffle 2011 and the second baffle 2012 are each connected to a set of water guide pipes 202. Their inner free ends abut against each other on the top surface of the photovoltaic module 10 to jointly form a complete water collection chamber spanning the surface of the photovoltaic module 10. The first baffle 2011 and the second baffle 2012 extend from both sides of the photovoltaic module 10 towards the center. When the driving component 30 drives the water guide pipes 202 to rotate to the interception mode, the inner free ends of the two baffles meet at the center line of the photovoltaic panel, thus forming a complete interception line spanning the width of the photovoltaic panel. Setting two sets of baffles across the photovoltaic panel avoids deformation due to the long overhang length of the baffles over a long period. The overflow edge of the first baffle 2011 and the overflow edge of the second baffle 2012 are flush to ensure that the linear overflow weir remains horizontal, thereby ensuring the uniformity of the cooling liquid curtain.

[0024] Correspondingly, the first baffle 2011 has a shallow groove cross-section, and the second baffle 2012 has a deep groove cross-section. In the interception mode, the inner free end of the first baffle 2011 is nested within the inner free end of the second baffle 2012 to form an overlapping section that envelops each other. The first baffle 2011 and the second baffle 2012 have a height difference in size. When the drive component 30 controls them to rotate in opposite directions to the interception mode, the end of the shallow groove snaps into the opening of the deep groove, and the overlapping section that envelops each other forms a local double-layer groove structure. Setting an overlapping section of a certain length allows the first baffle 2011 and the second baffle 2012 to fully cover the photovoltaic panel when rotating.

[0025] At the initial startup of the cooling system, the baffle does not immediately enter a static interception mode. Instead, it is driven by the drive component 30 to perform a fan-shaped reciprocating motion at a certain angle. At this time, the water flow falling from the top spray component 11, combined with the mechanical swing of the baffle, produces a physical sweeping effect similar to that of a windshield wiper. Utilizing the initial water flow impact and the disturbance at the edge of the baffle, the dried dust, bird droppings, or contaminants accumulated on the surface of the photovoltaic panel can be quickly loosened and washed away. Furthermore, the reciprocating motion allows the cooling water to cover the entire panel surface in a short time, avoiding the thermal stress impact that may occur when the dry, high-temperature glass comes into direct contact with the static, cold water flow. Both the first baffle 2011 and the second baffle 2012 have scraper strips 15 on the side facing the surface of the photovoltaic module 10. The scraper strips 15 facilitate better cleaning of the photovoltaic panel surface and can be made of materials such as rubber or silicone.

[0026] During the storage phase after water supply is stopped, the drive component 30 can control the baffle to perform a fan-shaped reciprocating motion again, which facilitates the forced diversion of large droplets or accumulated water remaining on the surface of the photovoltaic panel, preventing the natural evaporation of water and the leaving of mineral scale. In addition, the residual water droplets also have a certain convex lens effect under sunlight, which will produce local focusing and cause micro hot spots. By cleaning through reciprocating rotation, the cleanliness and light transmittance of the panel surface are maintained, which is also beneficial to improving the power generation efficiency of the photovoltaic structure in the long run.

[0027] Based on the above embodiments, such as Figures 3-8 As shown, the second baffle 2012 has one end connected to the water pipe 202 as the output end, and the end of the water pipe 202 at the output end is equipped with a spray assembly 40. The first baffle 2011 has one end connected to the water pipe 202 as the closed end, and the end of the water pipe 202 or the first baffle 2011 at the closed end is in a blocked state. The photovoltaic module 10 uses a single-sided atomization of water flow. When multiple photovoltaic arrays are installed side by side on a large scale, it avoids collisions between the guide rails 12, water pipes and nozzles between adjacent photovoltaic panels in narrow gaps, which helps to reduce the difficulty of installation. The concentration of nozzles on both sides will cause the local water mist density in adjacent areas to be too high, which can easily cause electronic components to become damp or the bracket to rust faster. The single-sided distribution makes the water mist diffusion more uniform, effectively reducing the risk of microenvironment erosion to the building structure.

[0028] The water collection chamber of the second baffle 2012 is provided with a horizontally extending partition 13, which divides the space inside the second baffle 2012 into a water-facing space 17 and a water-returning space 18. A filter strip 14 is provided on the water-facing side of the partition 13, and the water guide pipe 202 is connected to the water-returning space 18. The partition 13 divides the deep groove-shaped second baffle 2012 horizontally. The water-facing space 17 serves as the primary filtration area, where the cooling water sprayed from the top first falls into the water, directly facing dust, fallen leaves, or impurities in the outdoor environment. The water-returning space 18 serves as the clean water storage area, and it is directly connected to the water guide pipe 202 to provide a clean water source for the downstream spray assembly 40. The filter strip 14 is further installed on the partition strip 13. When the water level in the water-facing space 17 rises, the water flow must pass through the micropores or grid of the filter strip 14 to enter the back water-facing space 18. This can effectively filter dirty water and prevent the spray assembly 40 below from becoming clogged. The filter strip 14 can be made of materials such as sponge with good water permeability.

[0029] In one embodiment, such as Figures 1-7 As shown, specifically, the drive assembly 30 includes a drive member 301 fixedly mounted on the top of the photovoltaic module 10 and a driven wheel 302 mounted on the bottom of the photovoltaic module 10. The output end of the drive member 301 is connected to the driven wheel 302 via a transmission belt 303. The transmission belt 303 is provided with a connector 304 for driving the water guide pipe 202 to rotate synchronously. The connector 304 includes a slider 3041 slidably mounted on the guide rail 12. The slider 3041 is fixedly connected to the transmission belt 303. The bottom of the slider 3041 is provided with a roller 3042. A rotating rod 3043 is fixed on the water guide pipe 202. The rotating rod 3043 is provided with a limiting groove 16 for the roller 3042 to be inserted and reciprocated.

[0030] The driving component 301 can be a stepper motor or a waterproof motor with an output drive wheel. The driving component 301 drives the transmission belt 303 to rotate, and the transmission belt 303 drives the slider 3041, which is fixedly connected to it, to slide smoothly along the guide rail 12. The roller 3042 at the bottom of the slider 3041 moves accordingly. The roller 3042 is embedded in the limiting groove 16 of the rotating rod 3043. When the roller 3042 slides linearly with the slider 3041, since the rotating rod 3043 rotates with the central axis of the water guide pipe 202 as the fulcrum, the sliding of the roller 3042 in the limiting groove 16 can actuate the rotating rod 3043 to rotate, thereby driving the entire water collecting baffle 201 to switch between the collection mode and the interception mode. By controlling the driving component 301 to frequently change the rotation direction, the slider 3041 can drive the roller 3042 to roll back and forth in the limiting groove 16, realizing the aforementioned fan-shaped surface reciprocating rotation cleaning function.

[0031] In one embodiment, such as Figures 1-7As shown, specifically, the spray assembly 40 includes a branch air pipe 401 fixedly installed at the bottom of the guide rail 12. Multiple atomizing nozzles 402 are connected to the branch air pipe 401. The atomizing nozzles 402 are connected to the water guide pipe 202 at the end of the second baffle 2012. The branch air pipe 401 is also connected to a main gas supply pipe 403. The atomizing nozzles 402 simultaneously receive two media: liquid from the water guide pipe 202 of the second baffle 2012, which uses gravity to deliver cooling water; and gas from the main gas supply pipe 403 and the high-pressure air from the branch air pipe 401. Inside or at the outlet of the atomizing nozzles 402, the high-speed airflow collides with the cooling water flow. The high-kinetic-energy airflow breaks the droplets into smaller particles. The airflow not only acts as a breaker but also serves as a carrier, providing initial momentum to the atomized droplets, enabling them to be sprayed to a more distant peripheral area from the photovoltaic module 10.

[0032] The extremely fine droplets have a larger specific surface area and evaporate very quickly in the air. This not only rapidly reduces the micro-environmental temperature around the photovoltaic module 10, but also effectively avoids the risk of mold or leakage caused by moisture on the building surface because the droplets evaporate completely before they reach the building surface.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technology of the present invention and the inventive concept of the photovoltaic building integrated cooling device, should be covered within the scope of protection of the present invention.

Claims

1. A building-integrated photovoltaic (BIPV) cooling device, comprising a photovoltaic module (10) and a spraying assembly (11) installed on top of the photovoltaic module (10), characterized in that, Also includes: Guide rails (12) are symmetrically arranged on both sides of the photovoltaic module (10); A water collection component (20) is disposed across the surface of the photovoltaic module (10), including a water collection baffle (201) and a water guide pipe (202) connected to the end of the water collection baffle (201), wherein the water guide pipe (202) is rotatably connected to the guide rail (12); The drive assembly (30) is mounted on the guide rail (12) and is used to drive the water pipe (202) to rotate and switch the water collection baffle (201) between the collection mode and the interception mode. The spray assembly (40) is connected to the end of the water guide pipe (202). The water flow accumulated in the water collection baffle (201) is transported to the spray assembly (40) through the water guide pipe (202) under the action of gravity pressure head, and is converted into diffused mist droplets and sprayed to the surrounding area of ​​the photovoltaic module (10).

2. The photovoltaic building-integrated cooling device according to claim 1, characterized in that: The water collection baffle (201) includes a first baffle (2011) and a second baffle (2012). The outer ends of the first baffle (2011) and the second baffle (2012) are each connected to a set of water guide pipes (202), and their inner free ends abut against each other on the top surface of the photovoltaic module (10) to jointly form a complete water collection chamber spanning the surface of the photovoltaic module (10).

3. The photovoltaic building-integrated cooling device according to claim 2, characterized in that: The first baffle (2011) has a shallow groove in cross-section, and the second baffle (2012) has a deep groove in cross-section. In the interception mode, the inner free end of the first baffle (2011) is nested inside the inner free end of the second baffle (2012) to form an overlapping section in which the grooves envelop each other.

4. The photovoltaic building-integrated cooling device according to claim 3, characterized in that: The second baffle (2012) is connected to the water pipe (202) at one end as the output end. The end of the water pipe (202) at the output end is provided with a spray assembly (40). The first baffle (2011) is connected to the water pipe (202) at one end as the closed end. The end of the water pipe (202) or the first baffle (2011) at the closed end is in a blocked state.

5. The building-integrated photovoltaic cooling device according to claim 4, characterized in that: The second baffle (2012) has a horizontally extending partition (13) in the water collection chamber. The partition (13) divides the space inside the second baffle (2012) into a water-facing space (17) and a water-returning space (18). The water-facing side of the partition (13) is provided with a filter strip (14), and the water guide pipe (202) is connected to the water-returning space (18).

6. The photovoltaic building-integrated cooling device according to claim 4, characterized in that: Both the first baffle (2011) and the second baffle (2012) have scraper strips (15) that abut against the side of the photovoltaic module (10).

7. The building-integrated photovoltaic cooling device according to claim 4, characterized in that: The overflow edge of the first baffle (2011) is flush with the overflow edge of the second baffle (2012).

8. The photovoltaic building-integrated cooling device according to claim 2, characterized in that: The drive assembly (30) includes a drive member (301) fixedly disposed on the top of the photovoltaic module (10) and a driven wheel (302) installed on the bottom of the photovoltaic module (10). The output end of the drive member (301) is connected to the driven wheel (302) through a transmission belt (303). The transmission belt (303) is provided with a connector (304) for driving the water pipe (202) to rotate synchronously.

9. The photovoltaic building-integrated cooling device according to claim 8, characterized in that: The connector (304) includes a slider (3041) slidably mounted on the guide rail (12). The slider (3041) is fixedly connected to the transmission belt (303). The bottom of the slider (3041) is provided with a roller (3042). A rotating rod (3043) is fixed on the water guide pipe (202). The rotating rod (3043) is provided with a limiting groove (16) for the roller (3042) to be inserted and reciprocated.

10. The photovoltaic building-integrated cooling device according to claim 4, characterized in that: The spray assembly (40) includes a branch air pipe (401) fixedly installed at the bottom of the guide rail (12). Multiple sets of atomizing nozzles (402) are connected to the branch air pipe (401). The atomizing nozzles (402) are connected to the water guide pipe (202) at the end of the second baffle (2012). The branch air pipe (401) is also connected to the main air supply pipe (403).

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