Waterproof BIPV photovoltaic power generation device

Abstract

The application discloses a waterproof type BI PV photovoltaic power generation device, which comprises a photovoltaic assembly and a frame profile, the photovoltaic assembly comprises a photovoltaic unit and the frame profile, the frame profile is provided with an assembly through groove and a cavity, the assembly through groove is in sealing connection with the photovoltaic unit, and an inner bottom wall of the assembly through groove is in communication with the cavity and is provided with a gas permeation gap; the device is provided with an air charging device and an exhaust pipe, the exhaust pipe is in communication with the cavity and is connected with a one-way valve, and the air charging device is used for inputting dry gas into the cavity so as to discharge the water vapor entering the gas permeation gap through the exhaust pipe. The waterproof type BI PV photovoltaic power generation device transports dry air into the gas permeation gap from the cavity through the air charging device, reduces the water vapor amount in the gas permeation gap while discharging the water vapor from the exhaust pipe, prevents the water vapor from invading the inside from the circumferential outer edge of the photovoltaic unit, and thus, the normal and stable operation of the photovoltaic assembly is ensured, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of BIPV photovoltaic module technology, and in particular to a waterproof BIPV photovoltaic power generation device. Background Technology

[0002] In recent years, with the rapid development of the photovoltaic industry, more and more photovoltaic modules are being integrated into buildings, forming building-integrated photovoltaics (BIPV). BIPV is the integration and combination of photovoltaic arrays with buildings. Currently, common BIPV technology applications include photovoltaic roof tiles, photovoltaic curtain walls, photovoltaic skylights, and photovoltaic railings.

[0003] To ensure the normal operation of BIPV photovoltaic modules, the four sides of the photovoltaic unit are typically sealed with sealants such as rubber and silicone when encapsulated by frame profiles. However, after long-term operation, due to thermal expansion and contraction, moisture in the air can still penetrate the sealant and enter the cell layer from all four sides of the photovoltaic module, affecting the normal power generation and lifespan of the photovoltaic module. Furthermore, the large length of the frame profiles increases the overall weight of the photovoltaic module, making it difficult to handle and install, and increasing the load on the building roof after installation. In addition, the installation of photovoltaic modules typically involves bolting each module individually onto the bracket, a cumbersome process that increases the installation burden on workers and reduces construction efficiency.

[0004] Therefore, it is necessary to improve the existing waterproof BIPV photovoltaic power generation devices. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects in the prior art and provide a waterproof BIPV photovoltaic power generation device that extends service life, ensures normal photovoltaic power generation, reduces weight, facilitates transportation, and improves installation and construction efficiency.

[0006] To achieve the above-mentioned technical effects, the technical solution of the present invention is: a waterproof BIPV photovoltaic power generation device, comprising: A photovoltaic module, which is installed on the top of a building, includes a photovoltaic unit and a frame profile surrounding the photovoltaic unit and connected end to end. The frame profile has an assembly slot and a cavity that extend along its own length. The two inner sidewalls of the assembly slot are respectively sealed to the light-receiving surface and the back-lighting surface of the photovoltaic unit. The inner bottom wall has a breathable gap with the photovoltaic unit that communicates with the cavity. An inflation device and an exhaust pipe are provided. The exhaust pipe is connected to the cavity and is equipped with a one-way valve facing away from the cavity. The inflation device is used to input dry gas into the cavity to discharge water vapor that has entered the venting gap through the exhaust pipe.

[0007] Preferably, in order to facilitate the installation of a larger number of photovoltaic modules on the top of the building and to facilitate the connection between the cavity and the ventilation gap, the cavity is located below the assembly slot, and the frame profile is provided with ventilation holes, the top end of the ventilation holes extending to the top surface of the frame profile and the bottom end extending to the side of the cavity adjacent to the assembly slot.

[0008] Preferably, in order to reduce the weight of the frame profile and facilitate the connection of two adjacent photovoltaic modules, multiple vent holes are provided along the length direction of the frame profile, and a casting recess is provided on the top surface of the frame profile that communicates with the vent holes; at least two photovoltaic modules are provided, and they are sequentially attached and connected along the length direction of one of the frame profiles, and the casting recess is used to inject adhesive that can be cured to form an adhesive sheet to connect adjacent photovoltaic modules.

[0009] Preferably, in order to further reduce the number of photovoltaic modules, the two cavities corresponding to the two frame profiles that are in contact with each other in two adjacent photovoltaic modules have openings and the openings are arranged facing each other.

[0010] Preferably, in order to strengthen the connection between two adjacent photovoltaic modules, the casting recess includes a first recess extending along the length direction of the frame profile and a second recess distributed along the length direction of the first recess and corresponding to and communicating with the vent holes. One side of the first recess extends to the side of the frame profile away from the photovoltaic unit, and one end of the second recess communicates with the first recess and its size is smaller than the size of the other end of the second recess.

[0011] Preferably, in order to facilitate the connection of two adjacent frame profiles in the photovoltaic module while the cavities of the two frame profiles are connected, the two adjacent frame profiles in the photovoltaic module are fixedly connected by corner brackets. The two ends of the corner brackets are respectively sealed to the circumferential inner walls of the cavities of the two adjacent frame profiles. The corner brackets are hollow corner brackets to connect the cavities of the two adjacent frame profiles.

[0012] Preferably, in order to reinforce the connection between two adjacent photovoltaic modules, the two adjacent photovoltaic modules are also connected by a connector, the connector including a connecting plate and two connector tubes, the corner bracket and the frame profile are respectively provided with a first socket and a second socket for sealing insertion of one of the connector tubes, and the connecting plate is connected to the frame profile by a first bolt.

[0013] Preferably, in order to achieve the scalability of the photovoltaic power generation device, a sealing plug is detachably connected to the end of the connector away from the photovoltaic unit.

[0014] Preferably, in order to ensure that there is a breathable gap between the photovoltaic unit and the inner bottom wall of the assembly channel while reducing the possibility of moisture intrusion into the battery layer, positioning protrusions are provided on the two inner sidewalls facing each other in the assembly channel. The photovoltaic unit includes a battery layer, and a film layer and a glass sheet are stacked on both sides of the battery layer in sequence. The plane on which the film layer and the glass layer are in contact is located between the gaps of the positioning protrusions, and the glass sheet abuts against the positioning protrusions.

[0015] Preferably, in order to facilitate the detection of water vapor concentration in the air gap, at least one of the frame profiles of the photovoltaic module is provided with a humidity sensor in the cavity or assembly slot.

[0016] In summary, compared with the prior art, the waterproof BIPV photovoltaic power generation device of the present invention delivers dry air from the cavity to the vent gap through the air-filling device. This allows water vapor to be discharged from the exhaust pipe while reducing the amount of water vapor in the vent gap, preventing water vapor from invading the interior from the circumferential outer edge of the photovoltaic unit. In this way, the normal and stable operation of the photovoltaic module is guaranteed, and its service life is extended. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 An explosion diagram; Figure 3 This is a schematic diagram of the structure of one of the photovoltaic modules of the present invention; Figure 4 yes Figure 3 An explosion diagram; Figure 5 yes Figure 4 Enlarged view of part A; Figure 6 yes Figure 3 A schematic diagram of the cross-sectional structure; Figure 7 yes Figure 6 Enlarged view of part B; Figure 8 This is a schematic diagram of the structure of another photovoltaic module of the present invention; Figure 9 yes Figure 8 The front view; Figure 10 yes Figure 9 AA-direction cross section; Figure 11 This is a structural diagram of the frame profile in a photovoltaic module; Figure 12 This is a structural diagram of another frame profile in a photovoltaic module; Figure 13 yes Figure 12The front view; Figure 14 This is a schematic diagram of the corner code structure; Figure 15 This is a structural diagram of the corner code from another perspective; Figure 16 This is an exploded view of the assembled components; Figure 17 yes Figure 16 An illustration of the explosion from another perspective; Figure 18 This is a partial structural diagram of the inflation device; Figure 19 yes Figure 18 An explosion diagram; Figure 20 yes Figure 19 A bottom view; Figure 21 yes Figure 20 BB-direction cross-section; In the diagram: 1. Photovoltaic unit; 11. Battery layer; 12. Encapsulant layer; 13. Glass sheet; 2. Frame profile; 21. Assembly slot; 22. Cavity; 23. Vent hole; 24. Casting recess; 241. First recess; 242. Second recess; 25. Second socket; 26. Positioning protrusion; 27. Humidity sensor; 28. Sealing plate; 3. Inflation device; 31. Air pump; 32. Drying drum; 321. Inner protrusion 322. Ring; 323. Connecting pipe; 324. Valve; 325. Inlet pipe; 36. Bucket lid; 37. Second bolt; 38. Nut; 39. Frame; 30. Hygrometer; 41. Inlet pipe; 52. Outlet pipe; 63. One-way valve; 54. Angle bracket; 55. First socket; 66. Connecting piece; 67. Connecting plate; 68. Connecting pipe; 69. Connecting hole; 60. Sealing plug; 61. First bolt; 72. Rubber plate; 83. Sealing strip. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0019] like Figures 1-21 As shown, the waterproof BIPV photovoltaic power generation device of the present invention includes: A photovoltaic module is installed on the top of a building and includes a photovoltaic unit 1 and a frame profile 2 that surrounds the photovoltaic unit 1 and is connected end to end. The frame profile 2 has an assembly slot 21 and a cavity 22 that extend along its own length. The two inner sidewalls of the assembly slot 21 are respectively sealed to the light-receiving surface and the back-lighting surface of the photovoltaic unit 1. The inner bottom wall has a breathable gap with the photovoltaic unit 1 that communicates with the cavity 22. The inflation device 3 and the exhaust pipe 4 are connected to the cavity 22 and are connected to a one-way valve 41 facing away from the cavity 22. The inflation device 3 is used to input dry gas into the cavity 22 so that the water vapor that enters the air gap can be discharged through the exhaust pipe 4.

[0020] In this invention, the photovoltaic modules are mainly installed on the top of the building for photovoltaic power generation. The inflation device 3 and the exhaust pipe 4 can be installed inside or outside the building as needed. Unlike the prior art, there is a ventilation gap between the inner bottom wall of the mounting groove 21 of the frame profile 2 and the photovoltaic unit 1, and the ventilation gap is connected to the cavity 22. Therefore, after water vapor enters the ventilation gap, the inflation device 3 can input dry gas into the cavity 22, so that the dry gas fills the ventilation gap and drives the water vapor out from the exhaust pipe 4, preventing water vapor from entering the photovoltaic unit 1 from the side. In this way, the normal photovoltaic power generation operation of the photovoltaic unit 1 is guaranteed and the service life is extended.

[0021] The specific structure of photovoltaic unit 1 is as follows: Figure 4 and Figure 7 As shown, the photovoltaic unit 1 includes a battery layer 11, on both sides of which a film layer 12 and a glass sheet 13 are stacked sequentially. That is, the photovoltaic unit 1 is formed by a five-layer structure, and the battery layer 11 is used to receive sunlight for photovoltaic power generation.

[0022] To create a gap between the photovoltaic unit 1 and the inner bottom wall of the assembly channel 21, positioning protrusions 26 are provided on the two inner sidewalls facing each other in the assembly channel 21. During assembly, sealing strips 8 of the same length and flush at the ends are fixed on the two inner sidewalls facing each other in the assembly channel 21. The sealing strips 8 are preferably rubber strips. The sides of the two glass sheets 13 away from the battery layer 11 abut against the sealing strips 8 to ensure a sealed connection between the photovoltaic unit 1 and the inner sidewall of the assembly channel 21. The glass sheets 13 abut against the positioning protrusions 26, creating a breathable gap between the sidewall of the photovoltaic unit 1 and the inner bottom wall of the assembly channel 21. Figure 7 As shown. The plane where the adhesive film layer 12 is in contact with the glass layer is located between the gaps of the positioning protrusions 26, thereby increasing the gap between the two positioning protrusions 26 to facilitate the entry of water vapor into the cavity 22. This avoids the positioning protrusions 26 being too large, which would cause water vapor to enter between the glass sheet 13 and the adhesive film layer 12. When water vapor passes through the sealing strip 8, it can enter the cavity 22 through the venting gap, allowing the water vapor to diffuse and reducing the amount of water vapor intruding into the battery layer 11. After the drying gas is introduced through the inflation device 3, the dryness of the cavity 22 and the venting gap can be guaranteed, thus ensuring the normal and stable operation of the photovoltaic module and extending its service life.

[0023] A further improvement is that the cavity 22 is located below the assembly slot 21, and the frame profile 2 is provided with a vent hole 23. The top end of the vent hole 23 extends to the top surface of the frame profile 2, and the bottom end extends to the side of the cavity 22 adjacent to the assembly slot 21.

[0024] The frame profile 2 is made of aluminum profile, which is plastically formed and has a certain profile and size. This allows the aluminum profile to have an assembly slot 21 and a cavity 22. The aluminum profile is cut into several segments, and then holes are drilled into the top surface of each segment to create ventilation holes 23. These ventilation holes 23 extend downwards from the top surface of the aluminum profile into the cavity 22, ensuring that after assembly with the photovoltaic unit 1, the ventilation gap between the frame profile 2 and the photovoltaic unit 1 remains connected through the lower part of the ventilation holes 23. To avoid the frame profile 2 becoming too wide and occupying too much installation area, the ventilation holes 23 are positioned adjacent to the side of the frame profile 2 furthest from the photovoltaic unit 1.

[0025] A further improvement is that multiple ventilation holes 23 are provided along the length of the frame profile 2, and a casting recess 24 communicating with the ventilation holes 23 is provided on the top surface of the frame profile 2.

[0026] In this invention, the vent holes 23 are evenly distributed along the length of the frame profile 2, and the top surface of the frame profile 2 is provided with casting recesses 24 communicating with the vent holes 23. The diameter of the vent holes 23 is 0-2mm. By adopting the above structure and providing the casting recesses 24 and multiple vent holes 23, the weight of the frame profile 2 can be reduced, facilitating the installation and handling of the frame profile 2 and reducing the burden on workers. After the photovoltaic module is installed on the roof of the building, a viscous adhesive is injected into the casting recesses 24. The adhesive cures and fills the casting recesses 24 while simultaneously blocking the top surface of the vent holes 23, preventing water from entering the top of the vent holes 23.

[0027] There are several options for adhesives. For example, fast-curing epoxy adhesives are two-component epoxy adhesives with low viscosity, rapid curing, and excellent water resistance. Polyurethane adhesives can also be used; these are one-component polyurethane adhesives with excellent bonding and water resistance, rapid curing, and are not prone to leakage through small holes. Additionally, silicone adhesives can be used. Silicone adhesives are one-component silicone adhesives with excellent temperature resistance and water resistance, rapid curing, and are not prone to leakage through small holes. They are also suitable for bonding metal materials, making them suitable for casting into the casting recesses 24 of aluminum profiles.

[0028] A further improvement is that at least two photovoltaic modules are provided, and they are sequentially attached and connected along the length of one of the frame profiles 2. The casting recess 24 is used to inject adhesive that can be cured to form an adhesive sheet 7 to connect adjacent photovoltaic modules.

[0029] In this invention, the number of photovoltaic modules is three, but it can also be two or more. The three photovoltaic modules are distributed along their width and connected in sequence. Alternatively, the photovoltaic modules can be distributed along their length and connected in sequence.

[0030] When two adjacent photovoltaic modules are bonded together, the two casting recesses 24 on the top surface of the two frame profiles 2 of the two photovoltaic modules are interconnected, so that after the curable adhesive is injected into the two casting recesses 24, the adhesive plate 7 is formed after the material is added and cured. This allows the two adjacent photovoltaic modules to be fixedly connected.

[0031] A further improvement is that the casting recess 24 includes a first recess 241 extending along the length of the frame profile 2 and a second recess 242 distributed along the length of the first recess 241 and correspondingly connected to the vent holes 23. One side of the first recess 241 extends to the side of the frame profile 2 away from the photovoltaic unit 1, and one end of the second recess 242 is connected to the first recess 241 and its size is smaller than the size of the other end of the second recess 242.

[0032] Specifically, the projection of the second recess 242 on the horizontal plane has a cap-shaped structure. When two adjacent photovoltaic modules are close together, the first recess 241 on the top surface of the two mating frame profiles 2 are directly connected. After the adhesive is injected, the resulting adhesive plate 7 is as follows: Figure 2 As shown, the adhesive plate 7 fills the casting recess 24 of the two adjacent frame profiles 2, so that the cured adhesive plate 7 mainly includes a straight strip and multiple connecting strips. The straight strip is filled between the two first recesses 241, and the connecting strips are dumbbell-shaped and distributed at intervals along the length of the straight strip, which firmly connects the two adjacent frame profiles 2, and then connects the two adjacent photovoltaic modules.

[0033] Therefore, when installing the photovoltaic power generation device of the present invention using the above structure, only the frame profile 2 of one photovoltaic module needs to be fixedly installed on the top of the building, and then the other photovoltaic modules are spliced ​​together in sequence. Curable adhesive is injected into the casting recess 24, thereby fixing two adjacent photovoltaic modules together. In this way, multiple photovoltaic modules can be fixedly connected in sequence. Compared with fixing photovoltaic modules one by one with bolts, the fixing method of the present invention can greatly reduce the workload of installation workers, reduce their workload, and improve construction efficiency.

[0034] A further improvement is that the two cavities 22 corresponding to the two frame profiles 2 that are attached to each other in two adjacent photovoltaic modules have openings and the openings are set facing each other.

[0035] Specifically, such as Figures 2-7 , Figure 10 and Figure 11As shown, the two frame profiles 2 connected in two adjacent photovoltaic modules each have an opening in their corresponding cavities 22, which face away from the photovoltaic unit 1 they are connected to. This makes the cavity 22 a groove-shaped structure facing away from the photovoltaic unit 1. When the two photovoltaic modules are connected, the two cavities 22 are directly connected. Therefore, there are a total of eight air gaps in the two photovoltaic modules that are interconnected. During dehumidification, dry gas is injected into the cavity 22 of one of the frame profiles 2. After continuous injection of dry gas, water vapor can be discharged from the exhaust pipe 4, preventing water vapor from entering the battery layer 11. This ensures the normal and stable operation of the photovoltaic module. Moreover, by adopting the above structure, the amount of production material used in the frame profiles 2 of the photovoltaic module can be reduced. While reducing the amount of production material to reduce production costs, the weight of the frame profiles 2 and the photovoltaic module is also reduced, which facilitates transportation and installation, reduces the assembly burden on workers, and is conducive to rapid construction and installation.

[0036] A further improvement is that in the photovoltaic module, two adjacent frame profiles 2 are fixedly connected by corner brackets 5. The two ends of the corner brackets 5 are respectively sealed to the circumferential inner wall of the cavity 22 of the two adjacent frame profiles 2. The corner brackets 5 are hollow corner brackets 5 to connect the cavity 22 of the two adjacent frame profiles 2.

[0037] The specific structure of corner code 5 is as follows Figure 14 and Figure 15 As shown, the corner bracket 5 is an L-shaped hollow tubular structure with square tubes at both ends, which are respectively sealed to the circumferential inner walls of the cavities 22 of the two adjacent frame profiles 2. In this way, the cavities 22 of the two adjacent frame profiles 2 are connected through the corner bracket 5. Moreover, the hollow structure of the corner bracket 5 reduces its own weight and the amount of production materials used, reduces production costs, and facilitates handling and assembly.

[0038] A further improvement is that two adjacent photovoltaic modules are connected by a connector 6, which includes a connecting plate 61 and two connector tubes 62. The corner bracket 5 and the frame profile 2 are respectively provided with a first socket 51 and a second socket 25 for one of the connector tubes 62 to be sealed and inserted. The connecting plate 61 is connected to the frame profile 2 by a first bolt 64.

[0039] The specific structure of connector 6 is as follows Figure 16 and Figure 17 As shown, the connection structure between connector 6 and the photovoltaic module is as follows: Figure 1 and Figure 2As shown, in order to ensure the surface flatness of the photovoltaic power generation device, the shorter frame profile 2 in the photovoltaic module has notches at both ends on the side away from the photovoltaic unit 1. The depth of the notches is the same as the thickness of the connecting plate 61, and the length of the notches is half the length of the connecting plate 61. When the two photovoltaic modules are attached and connected, the notches merge into a shape that matches the connecting plate 61. A second insertion port 25 is also provided at the bottom of the notches.

[0040] The corner bracket 5 has a first socket 51 on each of its two square tubes, which makes it convenient for the two square tubes of the corner bracket 5 to be connected to the cavities 22 of the two adjacent frame profiles 2 in any way. After connection, the first socket 51 on the corner bracket 5 is aligned with the second socket 25.

[0041] Based on the above structure, after the two photovoltaic modules are attached and connected, the two insertion pipes 62 on the plug 6 are inserted sequentially through the second insertion port 25 on their respective frame profile 2 and the first insertion port 51 on the corner bracket 5, and extended into the cavity 22. Then, the first bolts 64 are screwed into both ends of the connecting plate 61 to firmly install the connecting plate 61 on the frame profile 2, thereby strengthening the connection between the two adjacent photovoltaic modules.

[0042] Each of the two insertion tubes 62 has a connecting hole 621 extending into its respective cavity on the side facing away from each other, so that after one of the insertion tubes 62 of the connector 6 is inserted into one of the square tubes of the corner bracket 5, the cavities of the two square tubes remain connected, so as to ensure that the cavities 22 of two adjacent frame profiles 2 in the same photovoltaic module are connected to each other.

[0043] A further improvement is that a sealing plug 63 is detachably connected to the end of the connector 62 away from the photovoltaic unit 1.

[0044] Specifically, the insertion pipe 62 is threadedly connected to the sealing plug 63. This structure allows the photovoltaic power generation device to be flexibly expanded according to the specific conditions of the installation scenario. Specifically, this photovoltaic power generation device has one row of photovoltaic modules, with three modules per row. When installing two or more rows of photovoltaic modules, the sealing plug 63 on the insertion pipe 62 of the photovoltaic modules in adjacent rows can be unscrewed, allowing the insertion pipes 62 of each row to connect. The inflation device 3 can then inject dry gas into the vent gaps in the photovoltaic modules in adjacent rows through the connected insertion pipes 62 to expel moisture and prevent moisture intrusion, thus ensuring the normal and stable operation of the photovoltaic modules.

[0045] To ensure a tight fit between adjacent rows of photovoltaic modules, one side of the connector 6 is flush with the side of the shorter frame profile 2 facing away from the photovoltaic unit 1. In the connector 6, the insertion tube 62 and the sealing plug 63 are located on the inner side of the frame profile 2 facing away from the photovoltaic unit 1, i.e., the side closest to the photovoltaic unit 1. Thus, when adjacent rows of photovoltaic modules are connected, a tight fit can be achieved, ensuring that the recesses 24 cast on adjacent and mating frame profiles 2 in adjacent rows are aligned and interconnected, thereby fixing the photovoltaic modules in adjacent rows together.

[0046] In the photovoltaic module at the end position of the present invention, the shorter frame profile 2 has a notch at the end away from the adjacent photovoltaic module connected to a matching sealing plate 28. The sealing plate 28 is fixedly connected to the frame profile 2 and the corner bracket 5 by a first bolt 64.

[0047] A further improvement is that, in the photovoltaic module, at least one of the frame profiles 2 has a humidity sensor 27 installed in its cavity 22 or assembly slot 21.

[0048] Specifically, humidity sensors 27 are installed in the cavities 22 of the two shorter frame profiles 2. The humidity sensors 27 detect the humidity in the cavities 22, thereby determining the amount of water vapor in the air gap. When the amount of water vapor is too high, the air filling device 3 is activated to deliver dry gas into the cavities 22 of each photovoltaic module, and the water vapor is discharged from the exhaust pipe 4, thereby greatly reducing the amount of water vapor and preventing water vapor from entering the battery layer 11. In this way, the safe and stable operation of the photovoltaic module is guaranteed and the service life is extended.

[0049] In order to inject dry gas into the cavity 22 of the frame profile 2, the inflation device 3 of the present invention is structured as follows: Figure 2 , Figures 18-21 As shown, the inflation device 3 includes an air pump 31. The output end of the air pump 31 is connected to the cavity 22 of one of the frame profiles 2 of the photovoltaic module located at the end of the photovoltaic device and away from the exhaust pipe 4 via an inflation pipe 38. The output end is connected to a drying component, which is used to absorb moisture in the air passing through the air pump 31, so that the air pump 31 outputs dry air.

[0050] The drying assembly includes a drying barrel 32 with an open top. An air inlet pipe 324 is provided on the lower part of one side of the drying barrel 32, and a connecting pipe 322 is provided on the upper part of the other side. A valve 323 is provided on the connecting pipe 322, and the connecting pipe 322 is connected to the input end of the air pump 31. A flange is provided on the outer circumferential edge of the top of the drying barrel 32, and a barrel cover 33 is provided above the flange to cover the drying barrel 32. The barrel cover 33 and the flange are detachably fixedly connected by a second bolt 34 and a nut 35 threaded together. A drying unit is provided inside the drying barrel 32. The drying unit divides the inner cavity formed by the drying barrel 32 and the barrel cover 33 into an air inlet chamber and an air outlet chamber. The air inlet chamber is connected to the air inlet pipe 324, and the air outlet chamber is connected to the connecting pipe 322.

[0051] Specifically, the drying unit includes a mesh frame 36, which is used to hold a desiccant, preferably silica gel desiccant, molecular sieve, etc. An inner convex ring 321 is provided on the coaxial center line of the circumferential inner wall of the drying barrel 32. The circumferential outer edge of the mesh frame 36 is sealed to the circumferential inner wall of the inner convex ring 321, and the top abuts against the barrel cover 33. An outward flange is provided on the mesh frame 36, which fits against the top surface of the inner convex ring 321.

[0052] With the above structure, when it is necessary to fill the cavity 22 of the frame profile 2 with dry gas to squeeze out the water vapor, the valve 323 is opened and the air pump 31 is started, so that the outside air enters the air inlet chamber of the drying barrel 32 through the air inlet pipe 324, and comes into contact with the desiccant through the mesh frame 36. The desiccant absorbs the moisture in the air, thereby drying the gas. The dry gas is discharged from the air outlet chamber through the connecting pipe 322, and then enters the cavity 22 of the frame profile 2 through the air pump 31 and the air filling pipe 38 in sequence to squeeze out the water vapor and prevent the water vapor from entering the battery layer 11.

[0053] A hygrometer 37 is also installed in the air outlet chamber. The hygrometer 37 is fixedly connected to the mesh frame 36. The hygrometer 37 detects the release of moisture from the desiccant contained in the mesh frame 36. If the humidity meter 37 detects low air humidity, it indicates that the desiccant has a certain drying capacity and can continue to be used to dry the gas introduced into the drying barrel 32. If the humidity meter 37 detects high air humidity, it indicates that the desiccant has been saturated and no longer has a drying capacity. At this time, unscrew the second bolt 34, remove the barrel cover 33, take out the mesh frame 36, replace the desiccant in the mesh frame 36, and then put the mesh frame 36 back into the drying barrel 32. After closing the barrel cover 33, tighten it with the second bolt 34 and nut 35. The inflation device 3 can then be put back into use. In this way, the inflation device 3 can be used continuously to fill the cavity 22 and the vent gap of the photovoltaic module frame profile 2 with dry gas for a long time, so as to squeeze out the moisture through the exhaust pipe 4, ensuring that the battery layer 11 in the photovoltaic unit 1 operates in a dry environment, extending its service life and achieving safe and stable power generation.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A waterproof BIPV photovoltaic power generation device, characterized in that, include: A photovoltaic module, which is installed on the top of a building, includes a photovoltaic unit (1) and a frame profile (2) surrounding the photovoltaic unit (1) and connected end to end. The frame profile (2) has an assembly slot (21) and a cavity (22) extending along its own length. The two inner sidewalls of the assembly slot (21) are respectively sealed to the light-receiving surface and the back-lighting surface of the photovoltaic unit (1). The inner bottom wall has a breathable gap with the photovoltaic unit (1) that communicates with the cavity (22). An inflation device (3) and an exhaust pipe (4) are provided. The exhaust pipe (4) is connected to the cavity (22) and is connected to a one-way valve (41) facing away from the cavity (22). The inflation device (3) is used to input dry gas into the cavity (22) to discharge the water vapor that has entered the air gap through the exhaust pipe (4). The cavity (22) is located below the assembly slot (21), and the frame profile (2) is provided with a ventilation hole (23). The top end of the ventilation hole (23) extends to the top surface of the frame profile (2), and the bottom end extends to the side of the cavity (22) adjacent to the assembly slot (21). The ventilation holes (23) are provided in multiple ways along the length of the frame profile (2), and the top surface of the frame profile (2) is provided with a casting recess (24) that communicates with the ventilation holes (23); at least two photovoltaic modules are provided, and they are sequentially attached and connected along the length of one of the frame profiles (2), and the casting recess (24) is used to inject adhesive that can be cured to form a glue plate (7) to connect adjacent photovoltaic modules; The casting recess (24) includes a first recess (241) extending along the length of the frame profile (2) and a second recess (242) distributed along the length of the first recess (241) and corresponding to and connected with the ventilation holes (23). One side of the first recess (241) extends to the side of the frame profile (2) away from the photovoltaic unit (1). One end of the second recess (242) is connected to the first recess (241) and its size is smaller than the size of the other end of the second recess (242).

2. The waterproof BIPV photovoltaic power generation device according to claim 1, characterized in that: The two cavities (22) corresponding to the two frame profiles (2) that are attached to each other in two adjacent photovoltaic modules have openings and the openings are set facing each other.

3. The waterproof BIPV photovoltaic power generation device according to claim 1, characterized in that: In the photovoltaic module, two adjacent frame profiles (2) are fixedly connected by corner brackets (5). The two ends of the corner brackets (5) are respectively sealed to the circumferential inner wall of the cavity (22) of the two adjacent frame profiles (2). The corner brackets (5) are hollow corner brackets (5) to connect the cavities (22) of the two adjacent frame profiles (2).

4. The waterproof BIPV photovoltaic power generation device according to claim 3, characterized in that: Two adjacent photovoltaic modules are also connected by a connector (6), which includes a connecting plate (61) and two connectors (62). The corner bracket (5) and the frame profile (2) are respectively provided with a first socket (51) and a second socket (25) for sealing insertion of one of the connectors (62). The connecting plate (61) is connected to the frame profile (2) by a first bolt (64).

5. The waterproof BIPV photovoltaic power generation device according to claim 4, characterized in that: The end of the connector (62) away from the photovoltaic unit (1) is detachably connected to a sealing plug (63).

6. The waterproof BIPV photovoltaic power generation device according to claim 1, characterized in that: The two inner sidewalls opposite the assembly slot (21) are provided with positioning protrusions (26). The photovoltaic unit (1) includes a battery layer (11). Both sides of the battery layer (11) are sequentially stacked with an adhesive film layer (12) and a glass sheet (13). The plane on the side of the adhesive film layer (12) that is in contact with the glass layer is located between the gaps of the positioning protrusions (26). The glass sheet (13) abuts against the positioning protrusions (26).

7. The waterproof BIPV photovoltaic power generation device according to claim 1, characterized in that: In the photovoltaic module, at least one of the frame profiles (2) has a humidity sensor (27) installed in the cavity (22) or assembly slot (21).

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