Fabricated BIPV photovoltaic roof system

Abstract

The utility model discloses an assembly type building integrated photovoltaics (BIPV) photovoltaic roof system which connects a plurality of photovoltaic assemblies with frames and comprises a longitudinal water guide structure and a transverse water guide structure, the longitudinal water guide structure comprises a longitudinal water guide groove, a fixing piece, a fixing assembly and a longitudinal water guide groove gland, the longitudinal water guide groove is fixed with the frames of the photovoltaic assemblies through bolts, and the transverse water guide structure is fixed with the longitudinal water guide groove gland through bolts. A middle arm is arranged below the photovoltaic panel between the longitudinal water guiding grooves, the end portions of the longitudinal water guiding grooves are provided with connecting suites, and the longitudinal water guiding grooves and the transverse water guiding grooves form an internal water guiding network. According to the roof system, the photovoltaic modules with the frames are mutually connected, multiple waterproof structures are arranged at the connecting positions, meanwhile, the transverse and longitudinal water guide structure networks are arranged at the bottom end in parallel, and the sealing positions are prevented from making contact with water; meanwhile, leakage water or condensate water is guaranteed to be discharged organized, a layer of integral water guide structure is additionally arranged, a very small amount of permeated water drops can be guided by the metal structure to the transverse and longitudinal water guide grooves to be discharged to a roof eave gutter, and the problem of water seepage of a traditional photovoltaic module is avoided.

Description

Technical Field

[0001] This utility model relates to the field of building-integrated photovoltaics (BIPV) technology, specifically to a prefabricated BIPV photovoltaic roofing system. Background Technology

[0002] BIPV roof waterproofing differs fundamentally from metal roof and concrete waterproofing. The latter involves overall surface waterproofing, while BIPV waterproofing, similar to a glass skylight, focuses on waterproofing and drainage at the horizontal and vertical joints between panels. For the design of all the necessary details of sealing and drainage for achieving a high-performance BIPV roof, the core issue is understanding the relationship between "blocking" and "draining."

[0003] Traditional photovoltaic (PV) module roofing primarily relies on "sealing," meaning that sealing the external joints between components prevents water ingress. This assembly system provides some degree of sealing between glass panels and between glass panels and support rods, both externally and internally. However, it often neglects the importance of waterproofing the internal joints of the components. This method has various intractable drawbacks. For example, the external sealing material is exposed to the outdoors, and the sealant is subject to UV radiation, thermal stress, contaminants, and poor construction quality, making it difficult to achieve the desired sealing effect. Furthermore, while emphasizing internal sealing, the drainage of leaks and condensation within the structure is often overlooked. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a prefabricated BIPV photovoltaic roof system that connects multiple photovoltaic modules with frames to each other. It includes a longitudinal water guiding structure and a transverse water guiding structure. The longitudinal water guiding structure includes a longitudinal water guiding channel, a fixing component, a fixing component, and a longitudinal water guiding channel cover. The longitudinal water guiding channel is fixed to the frame of the photovoltaic module with bolts. A center support is provided under the photovoltaic panel between the longitudinal water guiding channels, and a connecting kit is provided at the end of the longitudinal water guiding channel.

[0005] Preferably, the longitudinal water guide channel has grooves on both sides of its bottom end, and the longitudinal water guide channel and the transverse water guide channel form an internal water guiding network.

[0006] Preferably, the top of the longitudinal water guide channel is provided with a groove for connecting and fixing the fixing component to the longitudinal water guide channel;

[0007] The longitudinal water guide channel has channels at both ends for connecting fasteners, which fix the longitudinal water guide channel to the purlin.

[0008] Preferably, the fastener has a slot and a fixing end. The slot is used to engage with the outside of the groove wall, and the fixing end has a through hole.

[0009] Preferably, the fixing component includes a pressure block, a locking block, and an internal hex screw;

[0010] The pressure block has a through hole in the middle corresponding to the internal hexagon screw, and the two ends of the pressure block have protrusions corresponding to the longitudinal water guide groove cover, which are used to snap the longitudinal water guide groove cover.

[0011] The card block has a slot for engaging with the groove, and a threaded hole at the upper end for connecting an internal hex screw.

[0012] Preferably, the fixing component includes a top block, a first slide rail, and a second slide rail;

[0013] The top block has a through hole in the middle, and the first slide rail and the second slide rail are fastened together. The second slide rail is provided with a mounting block.

[0014] Preferably, the longitudinal water guide groove cover has fixing grooves on both sides, and water-stop strips are installed in the fixing grooves;

[0015] The purlin has support protrusions at both ends, and the two ends of the purlin are used to support the insulation board.

[0016] Preferably, the transverse water guiding structure includes a transverse water guiding channel and a transverse connector, wherein the transverse connector is disposed between the transverse connections of the two photovoltaic modules;

[0017] The transverse water guide channel is located at the lower end of the transverse connector. Both ends of the transverse water guide channel are set at the upper end of the side groove of the longitudinal water guide channel, and the longitudinal water guide channel supports the transverse water guide channel.

[0018] Preferably, the middle section of the support has a bent portion.

[0019] Preferably, the connection kit includes a first kit, a second kit, and a third kit;

[0020] The first kit covers the upper end face of the longitudinal water guide channel, the second kit covers the lower end face of the longitudinal water guide channel, and the third kit covers the outside of the first kit and the second kit.

[0021] The technical effects and advantages of this utility model are as follows:

[0022] This roofing system consists of interconnected photovoltaic modules with frames. Multiple waterproof structures are installed at the connection points, while a horizontal and vertical water-guiding network is set at the bottom to minimize contact between the seals and water, while ensuring that leaks or condensation are drained in an organized manner. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the longitudinal water guiding structure in the prefabricated BIPV photovoltaic roof system provided in this application embodiment. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the longitudinal water guiding structure in the prefabricated BIPV photovoltaic roof system provided in this application embodiment. Figure 2 ;

[0025] Figure 3 This is a schematic diagram of the connection structure of the purlins in the prefabricated BIPV photovoltaic roofing system provided in the embodiments of this application;

[0026] Figure 4 This is a schematic diagram of the horizontal water guiding structure in the prefabricated BIPV photovoltaic roof system provided in the embodiments of this application;

[0027] Figure 5 This is a schematic diagram of the longitudinal water channel in the prefabricated BIPV photovoltaic roof system provided in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the longitudinal water channel in the prefabricated BIPV photovoltaic roof system provided in the embodiments of this application;

[0029] Figure 7 This is a structural schematic diagram of the fixing components in the prefabricated BIPV photovoltaic roofing system provided in the embodiments of this application;

[0030] Figure 8 This is a schematic diagram of the structure of the fixed components in the prefabricated BIPV photovoltaic roof system provided in the embodiments of this application;

[0031] Figure 9 This is a schematic diagram of the structure of the longitudinal water channel cover in the prefabricated BIPV photovoltaic roof system provided in the embodiments of this application;

[0032] Figure 10 This is a structural schematic diagram of the purlin in the prefabricated BIPV photovoltaic roofing system provided in the embodiments of this application;

[0033] Figure 11 This is a structural schematic diagram of the horizontal connector in the prefabricated BIPV photovoltaic roof system provided in the embodiments of this application;

[0034] Figure 12 This is a schematic diagram of the structure of the supporting structure in the prefabricated BIPV photovoltaic roof system provided in the embodiments of this application;

[0035] Figure 13 This is a schematic diagram of the longitudinal water guiding structure in the prefabricated BIPV photovoltaic roof system provided in this application embodiment. Figure 3 ;

[0036] Figure 14This is a structural schematic diagram of the connector in the prefabricated BIPV photovoltaic roof system provided in the embodiments of this application.

[0037] In the diagram: 100, photovoltaic module; 200, longitudinal water guide channel; 210, groove; 220, trench; 230, channel wall; 300, fastener; 310, slot; 320, fixing end; 400, fixing component; 410, pressure block; 420, locking block; 430, hex socket screw; 440, top block; 450, first slide rail; 460, second slide rail; 470, mounting block; 500, longitudinal... Guide water channel cover; 510, fixing groove; 520, water-stop strip; 600, purlin; 610, support protrusion; 700, insulation board; 800, transverse water channel; 900, transverse connector; 910, first water-blocking strip; 920, second water-blocking strip; 1000, central support; 1100, connector; 1110, first kit; 1120, second kit; 1130, third kit. Detailed Implementation

[0038] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0039] Please see Figures 1-4 This embodiment provides a prefabricated BIPV photovoltaic roof system. The roof system connects multiple photovoltaic modules 100 with frames to each other. At the connection points of the multiple photovoltaic modules 100, multiple waterproof structures are set, and a horizontal and vertical water guiding structure network is set in parallel at the bottom. Compared with the single-layer water guiding structure of traditional photovoltaic modules, a very small amount of water droplets that seep in will be guided by the metal structure to the horizontal and vertical water guiding channels and discharged into the roof eaves gutter, thereby avoiding the water seepage problem of the top of traditional photovoltaic modules.

[0040] Specifically, it includes a longitudinal water guide channel 200, a transverse water guide channel 800, a transverse connector 900 between photovoltaic modules 100, a fixing component 400 fixed between photovoltaic modules 100, and a longitudinal water guide channel cover 500, which are fixed with T-screws and hexagonal screws.

[0041] Furthermore, the longitudinal water guiding structure includes a longitudinal water guiding channel 200, a fixing component 300, a fixing assembly 400, and a longitudinal water guiding channel cover 500. The longitudinal water guiding channel 200 is fixed to the frame of the photovoltaic module 100 with bolts, and together with the longitudinal water guiding channel cover 500, a seamless metal surface waterproofing is formed. The longitudinal water guiding channel cover 500, made of aluminum alloy, and the frame of the photovoltaic module 100 form a metal surface waterproofing, which can drain most of the rainwater.

[0042] See Figures 5-6 As shown, grooves 210 are provided on both sides of the bottom end of the longitudinal water guide channel 200. The longitudinal water guide channel 200 and the transverse water guide channel 800 form an internal water guiding network, which guides a very small amount of seepage water and condensate water into the roof eaves gutter drainage through the overall water guiding system.

[0043] Furthermore, the top of the longitudinal water guide channel 200 is provided with a groove 220 for connecting the fixing component 400 and fixing the fixing component 400 to the longitudinal water guide channel 200. The two ends of the longitudinal water guide channel 200 are provided with channel walls 230 for connecting the fixing component 300 and fixing the longitudinal water guide channel 200 to the purlin 600 through the fixing component 300.

[0044] Please continue reading Figure 5 The groove 220 at the top of the longitudinal water guide channel 200 can be rectangular, elliptical, embedded, or flat-top, which can be adapted to the fixing components 400 of different shapes and combinations to fix the photovoltaic module 100.

[0045] For example, see Figure 6 The groove 220 at the top of the longitudinal water guide channel 200 can be open or closed, and can be set to be hollow or solid according to installation requirements, so as to adapt to different installation schemes while ensuring effective support strength.

[0046] See Figure 7 As shown, the fastener 300 is provided with a slot 310 and a fixing end 320. The slot 310 is used to snap onto the outside of the groove wall 230, and the fixing end 320 has a through hole for installing a T-screw.

[0047] In practice, the slot 310 is snapped onto the wall 230 of the channel, and the fixed end 320 is fixed to the purlin 600 with a T-screw, thereby fixing the longitudinal water guide channel 200.

[0048] Furthermore, the connection between the slot 310 and the fixing end 320 of the fastener 300 can be bent, and mounting holes or mounting grooves can be provided according to installation requirements. This can effectively increase the contact area between the fastener 300 and the longitudinal water guide channel 200, making the longitudinal water guide channel 200 more stable and less prone to deformation.

[0049] See Figure 8 As shown, the fixing component 400 includes a pressure block 410, a locking block 420, and an internal hex screw 430. The pressure block 410 is used to press the photovoltaic module 100. The middle of the pressure block 410 has a through hole corresponding to the internal hex screw 430. Both ends of the pressure block 410 have protrusions corresponding to the longitudinal water guide channel cover 500 for locking the longitudinal water guide channel cover 500. The locking block 420 has a locking groove for locking onto the groove 220. The upper end of the locking block 420 has a threaded hole for connecting the internal hex screw 430.

[0050] In practice, the locking block 420 is fitted onto the groove 220, and the hexagonal screw 430 passes through the through hole of the pressure block 410 and is screwed into the threaded hole of the locking block 420. The two ends of the pressure block 410 press the frames of the two photovoltaic modules 100 respectively, and then the hexagonal screw 430 is tightened. The photovoltaic module 100 is fixed by the pressure block 410 and the locking block 420.

[0051] Please continue reading. Figure 8 Another embodiment of the fixing component 400 includes a top block 440, a first slide rail 450, and a second slide rail 460.

[0052] The top block 400 has a through hole in its center, and the first slide rail 450 and the second slide rail 460 are fastened together, with the second slide rail 460 equipped with a mounting block 470. During installation, this combined bolt structure allows for flexible sliding and adjustment of the position. Compared to a bolt structure consisting of a pressure block 410, a locking block 420, and an internal hexagonal screw 430, it can be installed later, eliminating the need for pre-calculation and pre-placement, thus effectively improving installation speed and accuracy.

[0053] See Figure 9 As shown, the longitudinal water guide trough cover 500 has fixing grooves 510 on both sides. The fixing grooves 510 are equipped with water-stop strips 520. The water-stop strips 520 are made of 2.0mm thick EPDM rubber waterproof strips to form a flexible waterproof strip. This can block a small amount of water from seeping in, forming a flexible waterproof layer. At the same time, the waterproof strip can also prevent deformation and displacement between the photovoltaic modules 100 caused by thermal expansion and contraction, thus avoiding damage to the overall waterproof structure.

[0054] In practice, a layer of waterproof silicone structural adhesive is applied between the longitudinal water guide channel cover 500 and the frame of the photovoltaic module 100, so that a completely sealed structure is formed between the longitudinal water guide channel cover 500 and the frame of the photovoltaic module 100, forming a waterproof layer. At the same time, the sealing coverage of the silicone adhesive prevents the water-stop strip 520 from being exposed to direct sunlight, eliminating the risk of strip aging.

[0055] See Figure 10 and Figure 13As shown, the purlin 600 is designed in a "channel" shape. Support protrusions 610 are provided at both ends of the purlin 600. The two ends of the purlin 600 are used to support the insulation board 700. The insulation board 700 is placed on the support protrusions 610 of the purlin 600 in a floating manner and then fixed by angle brackets.

[0056] Specifically, the insulation board 700 does not need to bear the load. The interior of the insulation board 700 is designed with a cavity type, bubble type, or honeycomb type intermediate structure, which has the characteristics of high cost performance, good heat insulation performance, good waterproof performance, and light weight. It can effectively improve the roof insulation performance and leave enough space between the insulation board and the photovoltaic panel for air flow and heat dissipation.

[0057] Refer to Figure 11 As shown, the transverse water guiding structure includes a transverse water guiding groove 800 and a transverse connecting member 900. The transverse connecting member 900 is arranged between the transverse connections of two photovoltaic modules 100. The transverse connecting member 900 is a special-shaped aluminum alloy transverse connecting member with a thickness of 1.0 mm. The two sides and the top cover of the transverse connecting member 900 are closely fitted with the frame of the photovoltaic module 100 to form a waterproof layer.

[0058] The transverse water guiding groove 800 is located at the lower end of the transverse connecting member 900. The transverse water guiding groove 800 is located at the upper end of the longitudinal water guiding groove 200. Both ends of the transverse water guiding groove 800 are arranged at the upper ends of the side grooves 210 of the longitudinal water guiding groove 200. The transverse water guiding groove 800 and the longitudinal water guiding groove 200 form an internal water guiding network, and a very small amount of infiltrated water and condensate are introduced into the roof gutter for drainage through the overall water guiding system.

[0059] The overlapping extension part of the transverse water guiding groove 800 can promote the drainage of the transverse water guiding groove 800 to the longitudinal water guiding groove 200. The longitudinal water guiding groove cover 500 on the surface of the photovoltaic module 100 and the colloids on both sides penetrate and cover the transverse and longitudinal joints, making the surface drainage structure more reliable.

[0060] Specifically, refer to Figure 11 [[ID=​​Furthermore, the first water-blocking strip 910 and the second water-blocking strip 920 are 2.0mm thick EPDM rubber waterproof strips, forming a flexible waterproof layer that can block a small amount of seeping water.

[0062] Please continue reading. Figure 11 In another embodiment of the transverse connector 900, the first water-blocking strip 910 and the second water-blocking strip 920 on both sides of the transverse connector 900 are symmetrically arranged and are semi-circular, which can effectively prevent the upper photovoltaic roof from forming asymmetrical compression on the lower photovoltaic roof, thereby solving the problem of water leakage caused by one side of the transverse connector lifting up.

[0063] See Figure 12 A central support 1000 is also installed below the photovoltaic panels between the longitudinal water guide channels 200. The addition of the central support 1000 structure can provide stronger support for the middle of the photovoltaic panels, while also hiding the photovoltaic cables, thus protecting the cable life and ensuring the simple and beautiful bottom of the photovoltaic roof.

[0064] For details, please refer to Figure 12 The middle section of the support 1000 has a bending section 1010. The bending section 1010 can be bent inward to form a trapezoid, or it can be bent outward symmetrically with corrugated protrusions.

[0065] See Figure 14 When the photovoltaic panel is long, the length of the longitudinal water channel cannot meet the requirements. Therefore, a connecting kit 1100 needs to be installed at the end of the longitudinal water channel 200 to ensure the sealing of the end connection.

[0066] The connecting kit 1100 includes a first kit 1110, a second kit 1120 and a third kit 1130: the first kit 1110 covers the upper end face of the longitudinal water guide channel 200, the second kit 1120 covers the lower end face of the longitudinal water guide channel 200, and the third kit 1130 covers the outside of the first kit 1110 and the second kit 1120.

[0067] Working principle: After installing the steel structure, install the "U"-shaped purlins 600 in the direction perpendicular to the roof water flow, then install the longitudinal water guide channels 200 in the direction parallel to the roof water flow, and install the center support 1000 between the longitudinal water guide channels 200. Then install the ridge plate in the middle, then lay the photovoltaic panels flat on both sides of the ridge plate, then install the fixing components 400, then install the transverse connectors 900, and then repeat the above steps to install the remaining photovoltaic panels.

[0068] This roofing system consists of interconnected photovoltaic modules with frames. Multiple waterproofing structures are installed at the joints, while a network of horizontal and vertical water-guiding structures is arranged parallel to the bottom to minimize contact between the seals and water. This ensures that leaks or condensation are systematically drained. Compared to traditional photovoltaic modules, this system has an additional layer of integrated water-guiding structure. Even a small amount of water that seeps in is guided by the metal structure to the horizontal and vertical water channels and discharged into the roof gutters, thus avoiding the water leakage problems common with traditional photovoltaic modules.

[0069] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A prefabricated BIPV photovoltaic roofing system, comprising interconnecting multiple photovoltaic modules (100) with attached frames, characterized in that, It includes a longitudinal water guiding structure and a transverse water guiding structure. The longitudinal water guiding structure includes a longitudinal water guiding channel (200), a fixing member (300), a fixing component (400), and a longitudinal water guiding channel cover (500). The longitudinal water guiding channel (200) is fixed to the frame of the photovoltaic module (100) by bolts. A center support (1000) is provided below the photovoltaic panel between the longitudinal water guiding channels (200). A connecting kit (1100) is provided at the end of the longitudinal water guiding channel (200).

2. The prefabricated BIPV photovoltaic roofing system according to claim 1, characterized in that, The longitudinal water guide channel (200) has grooves (210) on both sides of its bottom end, and the longitudinal water guide channel (200) and the transverse water guide channel (800) form an internal water guiding network.

3. The prefabricated BIPV photovoltaic roofing system according to claim 2, characterized in that, The top of the longitudinal water guide channel (200) is provided with a groove (220) for connecting the fixing component (400) and fixing the fixing component (400) to the longitudinal water guide channel (200); The longitudinal water guide channel (200) has channel walls (230) at both ends for connecting fasteners (300), and the longitudinal water guide channel (200) is fixed to the purlin (600) by the fasteners (300).

4. The prefabricated BIPV photovoltaic roofing system according to claim 3, characterized in that, The fastener (300) is provided with a slot (310) and a fixing end (320). The slot (310) is used to engage with the outside of the groove wall (230), and the fixing end (320) is provided with a through hole.

5. A prefabricated BIPV photovoltaic roofing system according to claim 4, characterized in that, The fixing component (400) includes a pressure block (410), a locking block (420), and an internal hex screw (430); The pressure block (410) has a through hole in the middle corresponding to the internal hexagon screw (430), and the two ends of the pressure block (410) have protrusions corresponding to the longitudinal water guide groove cover (500) for snapping into the longitudinal water guide groove cover (500). The card block (420) has a card slot for engaging with the groove (220), and the upper end of the card block (420) has a threaded hole for connecting an internal hex screw (430).

6. A prefabricated BIPV photovoltaic roofing system according to claim 1, characterized in that, The fixing component (400) includes a top block (440), a first slide rail (450), and a second slide rail (460); The top block (440) has a corresponding through hole in the middle, the first slide rail (450) and the second slide rail (460) are fastened together, and the second slide rail (460) is provided with a mounting block (470).

7. A prefabricated BIPV photovoltaic roofing system according to claim 5, characterized in that, The longitudinal water guide groove cover (500) has a fixing groove (510) at both ends, and a water-stop strip (520) is provided in the fixing groove (510); the purlin (600) has a support protrusion (610) at both ends, and the two ends of the purlin (600) are used to support the insulation board (700).

8. A prefabricated BIPV photovoltaic roofing system according to claim 1, characterized in that, The lateral water guiding structure includes a lateral water guiding channel (800) and a lateral connector (900), with the lateral connector (900) disposed between the two photovoltaic modules (100) in a lateral connection. The transverse water guide groove (800) is located at the lower end of the transverse connector (900). The two ends of the transverse water guide groove (800) are set at the upper end of the side groove (210) of the longitudinal water guide groove (200), and the longitudinal water guide groove (200) supports the transverse water guide groove (800).

9. A prefabricated BIPV photovoltaic roofing system according to claim 1, characterized in that, The middle section (1000) is provided with a bending section (1010).

10. A prefabricated BIPV photovoltaic roofing system according to claim 1, characterized in that, The connection kit (1100) includes a first kit (1110), a second kit (1120), and a third kit (1130); The first kit (1110) covers the upper end face of the longitudinal water guide channel (200), the second kit (1120) covers the lower end face of the longitudinal water guide channel (200), and the third kit (1130) covers the outside of the first kit (1110) and the second kit (1120).

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