Photovoltaic support unit and photovoltaic hybrid system

Abstract

The application relates to a photovoltaic support unit and a photovoltaic fusion system. The photovoltaic support unit comprises a plurality of support purlins and a plurality of joint pieces. The support purlin comprises a first support structure and a second support structure. The first support structure is used for being fixed to a roof. The first support structure has a containing cavity. The second support structure is arranged in the containing cavity and is used for bearing a photovoltaic module in pressure block pressure joint cooperation. The second support structure is configured to form a first drainage channel in communication with the outside. The first drainage channel is used for accommodating a locking piece of the locking pressure block. Two adjacent support purlins are spliced through the joint piece, so that two adjacent first drainage channels are communicated. The photovoltaic support unit of the application not only simplifies the installation and fixing process of the photovoltaic module, improves the construction efficiency, but also optimizes the drainage effect and avoids the water seepage problem.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a photovoltaic support unit and a photovoltaic fusion system. Background Technology

[0002] With the development of building-integrated photovoltaic (BIPV) technology, lightweight BIPV systems that integrate aesthetic photovoltaic modules into sloping roofs have emerged. These systems have dual functions of power generation and building envelope, effectively utilizing roof space and enhancing aesthetics, thereby promoting the development of related support structures and drainage methods.

[0003] In related technologies, a combination of water-guiding channels and supporting structures is typically used to fix and drain photovoltaic modules. For example, longitudinal and transverse water-guiding channels are set up, along with pressure blocks and sealing structures, to divert water accumulated between the module gaps. However, the above method is cumbersome to construct, inefficient, structurally complex, and costly; at the same time, the drainage path is not smooth, especially at the junction of the photovoltaic modules and the roof tiles, which is prone to water accumulation and leakage, affecting waterproofing performance. Utility Model Content

[0004] Therefore, it is necessary to provide a photovoltaic support unit and a photovoltaic integration system to address the problems of cumbersome fixing procedures and poor drainage paths for rooftop photovoltaic modules.

[0005] This application provides a photovoltaic support unit, the photovoltaic support unit comprising:

[0006] Multiple supporting purlins, each supporting purlin including a first supporting structure and a second supporting structure, the first supporting structure being fixed to the roof and having a receiving cavity; the second supporting structure being disposed within the receiving cavity and being used to support photovoltaic modules that are pressed and fitted with a pressure block, the second supporting structure forming a first drainage channel communicating with the outside, the first drainage channel being used to accommodate a locking element for locking the pressure block;

[0007] Multiple connectors are used to connect adjacent support purlins so that adjacent first drainage channels are connected.

[0008] In one embodiment, the connector has a plug-in interface that engages with the support purlin.

[0009] The connector has a first overlapping portion on its plug-in interface extending in a first direction. The upper surface of the first overlapping portion is in contact with the bottom surface of the adjacent support purlin, and the inner wall of the drainage channel of the support purlin is flush with the inner wall of the plug-in interface. The first direction is the upward direction along the roof slope.

[0010] In one embodiment, the connector has a second overlapping portion on the plug-in interface extending in a second direction. The lower surface of the second overlapping portion is in contact with the top surface of the adjacent support purlin, and the inner wall of the drainage channel of the support purlin is flush with the inner wall of the plug-in interface. The second direction is the direction downward along the roof slope.

[0011] In one embodiment, with the bottom of the connector as the reference plane, the height of the overlapping plane of the second overlapping portion is higher than the height of the overlapping plane of the first overlapping portion.

[0012] In one embodiment, the connector has a plug-in interface that engages with the support purlin.

[0013] The connector has a third overlapping portion on the plug-in interface extending along a third direction. The upper surface of the third overlapping portion is in contact with the bottom surface of the adjacent support purlin, and the inner wall of the drainage channel of the support purlin is flush with the inner wall of the plug-in interface. The third direction is parallel to the ridge direction and perpendicular to the roof slope direction.

[0014] In one embodiment, the connector is cross-shaped or T-shaped.

[0015] In one embodiment, the second support structure includes a support plate and a mounting member connected to each other. The support plate is used to support a photovoltaic module that is pressed and engaged with the pressure block, and the mounting member is used to accommodate a locking member that locks the pressure block. The mounting member encloses a first drainage channel that communicates with the outside.

[0016] In one embodiment, the first drainage channel includes a mating channel and a locking groove. The locking groove is used to accommodate the locking member. The dimension of the mating channel along the fourth direction is smaller than the dimension of the locking groove along the fourth direction, so that a stepped surface is formed at the connection between the mating channel and the locking groove. The stepped surface is used to restrict the locking member from disengaging from the locking groove. The fourth direction is the splicing direction of two adjacent photovoltaic modules.

[0017] In one embodiment, the outer wall of the second support structure and the cavity wall of the accommodating cavity form a second drainage channel.

[0018] This application also provides a photovoltaic integration system, including photovoltaic modules and photovoltaic support units as described in any of the above claims, with multiple support purlins installed on the roof and spliced ​​together by the connectors, the pressure block pressing against the photovoltaic modules and connected to the second support structure by the locking member.

[0019] The aforementioned photovoltaic support unit provides a stable installation foundation for the overall structure by fixing the first support structure of the supporting purlins to the roof. A second support structure is installed within the cavity of the first support structure, supporting the photovoltaic modules. The first drainage channel formed by the second support structure can accommodate locking components. The first drainage channel, locking components, and pressure blocks cooperate to fix the photovoltaic modules. The first drainage channel formed by the second support structure not only accommodates the locking components but also drains water accumulated around the photovoltaic modules. Simultaneously, adjacent supporting purlins are spliced ​​together with connectors, connecting adjacent first drainage channels to form a crisscrossing drainage network, ensuring rapid and smooth drainage of accumulated water. This photovoltaic support unit not only simplifies the installation and fixing process of photovoltaic modules and improves construction efficiency but also optimizes drainage, preventing water leakage problems. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the photovoltaic support unit provided in the embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the cross-shaped connector provided in an embodiment of this application.

[0022] Figure 3 for Figure 2 Sectional view at AA.

[0023] Figure 4 for Figure 2 Sectional view at BB.

[0024] Figure 5 This is a structural schematic diagram of a T-shaped connector provided in an embodiment of this application.

[0025] Figure 6 This is a schematic diagram of the structure of the supporting purlin provided in Embodiment 1 of this application.

[0026] Figure 7 for Figure 1 A magnified view of a portion at point A.

[0027] Figure 8 This is a schematic diagram of the structure of the supporting purlin provided in Embodiment 2 of this application.

[0028] Figure 9 This is a first-view structural schematic diagram of the supporting purlin provided in Embodiment 3 of this application.

[0029] Figure 10 This is a second-view structural schematic diagram of the supporting purlin provided in Embodiment 3 of this application.

[0030] Figure 11 This is a schematic diagram of the structure of two adjacent photovoltaic modules spliced ​​together by pressure blocks, as provided in Embodiment 3 of this application.

[0031] Figure label:

[0032] 100. Photovoltaic module; 110. Laminated component; 120. Frame;

[0033] 200. Pressed block;

[0034] 300. Locking component; 310. Screw; 320. Nut;

[0035] 400. Support purlins;

[0036] 410. First supporting structure; 411. Side plate; 412. Base plate; 413. Accommodating cavity; 414. First limiting plate;

[0037] 420. Second support structure; 421. Support plate; 422. Mating channel; 423. Locking groove; 424. Connecting hole;

[0038] 700. Connector; 710. First lap joint; 720. Second lap joint; 730. Third lap joint. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] This application provides a photovoltaic support unit, such as Figures 1 to 11As shown, the photovoltaic support unit includes multiple support purlins 400 and multiple connectors 700. Each support purlin 400 includes a first support structure 410 and a second support structure 420. The first support structure 410 is used to fix to the roof and has a receiving cavity 413. The second support structure 420 is disposed in the receiving cavity 413 and is used to support the photovoltaic module 100 that is pressed and matched with the pressure block 200. The second support structure 420 forms a first drainage channel that communicates with the outside. The first drainage channel is used to accommodate the locking member 300 that locks the pressure block 200. Adjacent support purlins 400 are spliced ​​together by connectors 700 so that adjacent first drainage channels are connected.

[0046] The aforementioned photovoltaic support unit provides a stable installation foundation for the overall structure by fixing the first support structure 410 of the supporting purlin 400 to the roof. A second support structure 420 is installed within the accommodating cavity 413 of the first support structure 410. The second support structure 420 supports the photovoltaic module 100, and the first drainage channel formed by the second support structure 420 can accommodate the locking member 300. The first drainage channel, locking member 300, and pressure block 200 cooperate with each other to fix the photovoltaic module 100. The first drainage channel formed by the second support structure 420 not only accommodates the locking member 300 but also drains water accumulated around the photovoltaic module 100. Simultaneously, adjacent supporting purlins 400 are spliced ​​together by connectors 700, connecting adjacent first drainage channels to form a crisscrossing drainage network, ensuring rapid and smooth drainage of accumulated water. The photovoltaic support unit of this application not only simplifies the installation and fixing process of the photovoltaic module 100 and improves construction efficiency but also optimizes drainage effects and avoids water leakage problems.

[0047] In one embodiment, such as Figures 1 to 3 As shown, the connector 700 has a plug-in interface that engages with the support purlin 400; the plug-in interface of the connector 700 extending in a first direction is provided with a first overlapping portion 710, the upper surface of the first overlapping portion 710 is in contact with the bottom surface of the adjacent support purlin 400, and the inner wall of the drainage channel of the support purlin 400 is flush with the inner wall of the plug-in interface, the first direction being the upward direction along the roof slope. The connector 700's plug-in interface engages with the support purlin 400, enabling rapid splicing of adjacent support purlins 400. A first overlapping portion 710 is provided on the plug-in interface extending along the first direction, allowing the first overlapping portion 710 to fit against the bottom surface of the adjacent support purlin 400. This not only enhances the connection stability and sealing between the support purlin 400 and the connector 700, preventing rainwater leakage from the connection point, but also ensures that the inner wall of the drainage channel of the support purlin 400 is flush with the inner wall of the plug-in interface, guaranteeing smooth flow of the first drainage channel and preventing obstruction of the drainage path, further improving the drainage performance of the photovoltaic support unit.

[0048] In one embodiment, such as Figures 1 to 3 As shown, the connector 700 has a second overlapping portion 720 on its insertion interface extending in the second direction. The lower surface of the second overlapping portion 720 is in contact with the top surface of the adjacent supporting purlin 400, and the inner wall of the drainage channel of the supporting purlin 400 is flush with the inner wall of the insertion interface. The second direction is downward along the roof slope. The second overlapping portion 720 on the insertion interface of the connector 700 extending in the second direction, with its lower surface in contact with the top surface of the adjacent supporting purlin 400, enhances the stability of the connection between the supporting purlin 400 and the connector 700 in the second direction and reduces connection gaps. Simultaneously, the inner wall of the drainage channel of the supporting purlin 400 is flush with the inner wall of the insertion interface, ensuring smooth communication between the first drainage channel of the supporting purlin 400 spliced ​​in the second direction and the connector 700. This prevents protrusions or depressions from obstructing drainage, allowing accumulated water to flow quickly out along the first drainage channel in the second direction. Furthermore, the combination of the first overlapping part 710 and the second overlapping part 720 further enhances the drainage effect of the photovoltaic support unit.

[0049] In one embodiment, such as Figures 1 to 3 As shown, with the bottom of the connector 700 as the reference plane, the height of the overlapping plane of the second overlapping part 720 is higher than the height of the overlapping plane of the first overlapping part 710. Using the bottom of the connector 700 as a reference plane, the height of the overlapping plane of the second overlapping part 720 is higher than that of the overlapping plane of the first overlapping part 710. This height difference is adapted to the roof slope characteristics in the first direction (upward along the roof slope) and the second direction (downward along the roof slope). Combined with the connection relationship that the lower surface of the second overlapping part 720 is attached to the top surface of the adjacent supporting purlin 400 and the upper surface of the first overlapping part 710 is attached to the bottom surface of the adjacent supporting purlin 400, it not only ensures the stable connection between the supporting purlin 400 and the connector 700 in different directions along the roof slope, avoiding displacement or loosening of the supporting purlin 400 at the splice due to the roof slope, but also further optimizes the drainage path by utilizing the height difference, so that the accumulated water flowing down the roof slope can be discharged more smoothly through the first drainage channel corresponding to the second direction.

[0050] In one embodiment, such as Figures 1 to 4As shown, the connector 700 has a plug-in interface that engages with the support purlin 400; the connector 700 has a third overlapping portion 730 on the plug-in interface extending in a third direction, the upper surface of the third overlapping portion 730 is in contact with the bottom surface of the adjacent support purlin 400, and the inner wall of the drainage channel of the support purlin 400 is flush with the inner wall of the plug-in interface, the third direction is parallel to the ridge direction and perpendicular to the roof slope direction. By providing a third overlapping portion 730 on the plug-in interface extending along the third direction, and having the third overlapping portion 730 fitting against the bottom surface of the adjacent supporting purlin 400, not only can the stability of the connection between the supporting purlin 400 and the connector 700 in the third direction (parallel to the ridge direction and perpendicular to the roof slope direction) be enhanced, reducing connection gaps, improving the sealing of the connection, and preventing rainwater from seeping in from the splicing gaps in the third direction; moreover, the inner wall of the drainage channel of the supporting purlin 400 is flush with the inner wall of the plug-in interface, ensuring that the first drainage channel of the supporting purlin 400 spliced ​​along the third direction can be smoothly connected, avoiding the structure that obstructs drainage due to splicing, and allowing accumulated water to flow smoothly along the first drainage channel in the third direction.

[0051] This application uses connectors 700 to splice multiple supporting purlins 400, thereby connecting the multiple first drainage channels of the multiple supporting purlins 400 to form a multi-directional drainage network. Furthermore, the first overlapping portion 710, the second overlapping portion 720, and the third overlapping portion 730 of this application cooperate to further optimize the drainage effect of the photovoltaic support unit, ensuring that water accumulation and leakage problems do not occur on the roof in any direction.

[0052] In this embodiment, as Figures 1 to 5 As shown, the connector 700 is either cross-shaped or T-shaped. By setting the connector 700 to either a cross-shaped or T-shaped configuration, the cross-shaped connector 700 can simultaneously support the purlin 400 in the first, second, and third directions. The T-shaped connector 700 can meet the splicing requirements of supporting the purlin 400 in two different directions. Both shapes of the connector 700 can adapt to splicing scenarios at different locations within a photovoltaic support unit. Furthermore, regardless of whether it is cross-shaped or T-shaped, its insertion interface maintains a structure flush with the inner wall of the drainage channel of the supporting purlin 400, and the fit between the overlapping part and the supporting purlin 400 is not affected by the shape, ensuring smooth connectivity of the first drainage channel in all directions.

[0053] Specifically, such as Figure 1 As shown, in the photovoltaic support unit of this application, the edge area adopts a T-shaped connector 700 to realize the splicing of the purlins 400 in two directions, which is adapted to the structural requirements at the edge; while the middle area adopts a cross-shaped connector, which can realize the splicing of the purlins 400 in four directions at the same time, so that the horizontal and vertical purlins form a complete grid.

[0054] In one embodiment, such as Figures 6 to 11 As shown, the supporting purlin 400 includes a first supporting structure 410 and a second supporting structure 420. The first supporting structure 410 is used to fix to the roof and has a receiving cavity 413. The second supporting structure 420 is disposed in the receiving cavity 413 and includes a supporting plate 421 and a mounting component connected to each other. The supporting plate 421 is used to support the photovoltaic module 100 that is pressed and matched with the pressure block 200. The mounting component is used to accommodate the locking component 300 of the pressure block 200. The mounting component forms a first drainage channel that communicates with the outside. The outer wall of the second supporting structure 420 and the cavity wall of the receiving cavity 413 form a second drainage channel.

[0055] The aforementioned supporting purlin 400 provides an installation foundation for the entire supporting purlin 400 by fixing the first supporting structure 410 to the roof. The second supporting structure 420 is located within the receiving cavity 413, and the receiving cavity 413 of the first supporting structure 410 provides a stable installation carrier and protective space for the second supporting structure 420. The supporting plate 421 of the second supporting structure 420 can directly support the frame 120 of the photovoltaic module 100, providing support and positioning for the photovoltaic module 100. The mounting component can accommodate the locking component 300 of the locking block 200, ensuring the stability of the pressing and fixing of the block 200 and the photovoltaic module 100. At the same time, the first drainage channel formed by the mounting component can quickly drain water around the photovoltaic module 100 and in the gaps, avoiding water residue. The second drainage channel formed by the outer wall of the second supporting structure 420 and the cavity wall of the receiving cavity 413 further expands the drainage path and improves the overall drainage capacity. The supporting purlin 400 of this application solves the problems of low construction efficiency and poor waterproof performance caused by the separate design of traditional supporting structure and water channel. While fixing the photovoltaic module 100, it ensures the drainage effect, and there is no need to install an additional water channel, which simplifies the installation steps and improves construction efficiency.

[0056] It should be noted that, as Figure 11 As shown, the photovoltaic module 100 includes a laminate 110 and a frame 120, with the frame 120 fitted onto the laminate 110. The locking member 300 includes a screw 310 and a nut 320, with the nut 320 located within a locking groove 423. A pressure block 200 presses against the top surface of the frame 120. The screw 310 passes sequentially through the pressure block 200 and the mating channel 422, extending into the locking groove 423 and threadedly connecting to the nut 320, thereby fixing the frame 120 assembly onto the support purlin 400.

[0057] Specifically, such as Figures 6 to 11As shown, the mounting component includes a mounting section and two vertical arms. The mounting section has a locking groove 423. The two vertical arms are arranged at intervals along a fourth direction, which is the splicing direction of two adjacent photovoltaic modules 100. The vertical arms are located at the opening of the locking groove 423 and connected to the groove wall of the locking groove 423. By setting the two vertical arms, the two vertical arms form a mating channel 422, and the space inside the locking groove 423 is connected to the outside through the mating channel 422.

[0058] In one embodiment, such as Figures 6 to 11 As shown, the first drainage channel includes a mating channel 422 and a locking groove 423. The locking groove 423 is used to accommodate the locking member 300. The dimension of the mating channel 422 along the fourth direction is smaller than the dimension of the locking groove 423 along the fourth direction, so that a stepped surface is formed at the connection between the mating channel 422 and the locking groove 423. The stepped surface is used to abut against the nut 320 of the locking member 300 to restrict the locking member 300 from disengaging from the locking groove 423. The fourth direction is the splicing direction of two adjacent photovoltaic modules 100. By limiting the dimension of the mating channel 422 along the fourth direction to be smaller than the dimension of the locking groove 423 along the fourth direction, a stepped surface is formed at the connection between the mating channel 422 and the locking groove 423. The stepped surface can directly abut against the nut 320 housed in the locking groove 423. The physical limiting structure formed by the size difference restricts the nut 320 from disengaging in the direction away from the locking groove 423, thus preventing the locking component 300 from accidentally disengaging when the photovoltaic module 100 is installed, used, or subjected to external forces (such as vibration or wind).

[0059] In one embodiment, such as Figures 6 to 11 As shown, one end of the mating channel 422, away from the locking groove 423, extends along the fourth direction towards the cavity wall near the receiving cavity 413 to form a support plate 421. By extending the mating channel 422 away from the locking groove 423 to form the support plate 421, the support plate 421 and the mating channel 422 form an integrated structure. This eliminates the need for a separate support plate 421 and its assembly, simplifying the overall structural processing and assembly process of the second support structure 420 and reducing the difficulty of component processing and assembly errors.

[0060] It should be noted that the mounting component of the second support structure 420 includes two vertical arms. The vertical arms extend along the fourth direction toward the side of the cavity wall near the receiving cavity 413 to form a support plate 421. The two vertical arms extend to form two support plates 421, which are located on both sides of the mating channel 422 along the fourth direction.

[0061] In one embodiment, such as Figures 6 to 11As shown, a connecting hole 424 is provided on the support plate 421 to connect the first drainage channel and the receiving cavity 413; and / or, a connecting hole 424 is provided on the channel wall (vertical arm of the mounting member) of the mating channel 422 to connect the first drainage channel and the receiving cavity 413; and / or, a connecting hole 424 is provided on the groove wall (mounting part of the mounting member) of the locking groove 423 to connect the first drainage channel and the receiving cavity 413. By providing connecting holes 424 on the support plate 421, and / or the channel wall of the mating channel 422, and / or the groove wall of the locking groove 423, the connecting holes 424 serve as water flow guidance paths, quickly guiding the accumulated water inside the second support structure 420 (inside the first drainage channel) into the receiving cavity 413.

[0062] Moreover, setting the connecting hole 424 does not require significant adjustments to the core structure of the first support structure 410 and the second support structure 420. Without affecting the load-bearing and fixing function of the support purlin 400 for the photovoltaic module 100 or damaging the original drainage channel foundation, the overall drainage efficiency can be improved through a simple hole structure.

[0063] In one embodiment, such as Figures 6 to 11 As shown, the connecting hole 424 is located on one of the side walls of the second support structure 420 arranged along the fourth direction, which is the splicing direction of two adjacent photovoltaic modules 100. The fourth direction, as the splicing direction of adjacent photovoltaic modules 100, is a key area where water easily accumulates. By centrally setting the connecting holes 424 on the side walls arranged along the fourth direction, the water flowing down from the splicing point of the modules can be directly guided, allowing the water to quickly enter the receiving cavity 413 through the connecting hole 424 along the splicing direction, thus preventing water from stagnating between the side wall of the second support structure 420 and the frame 120 of the photovoltaic module 100.

[0064] It should be noted that one of the side walls of the second support structure 420 arranged along the fourth direction includes a support plate 421, a channel wall of the mating channel 422, and a portion of the groove wall of the locking groove 423.

[0065] In one embodiment, such as Figures 6 to 11As shown, the first support structure 410 includes two opposing side plates 411 and a bottom plate 412 connecting the two side plates 411. The bottom plate 412 and the two side plates 411 enclose a cavity 413. The enclosure structure of the two opposing side plates 411 and the bottom plate 412 provides a regular space with a certain load-bearing strength for the cavity 413, ensuring that the second support structure 420 can obtain stable support and positioning when placed in the cavity 413, and preventing the second support structure 420 from shifting or shaking when bearing the weight of the photovoltaic module 100 or under external force. Moreover, the cavity 413 formed by the side plates 411 and the bottom plate 412 has an intact cavity wall structure, which can better cooperate with the second support structure 420 to form a second drainage channel. When water enters the cavity 413, the intact cavity wall can guide the water to drain smoothly along the length of the cavity 413, reducing the retention of water in the cavity 413.

[0066] In one embodiment, such as Figures 8 to 11 As shown, the first support structure 410 also includes a first limiting plate 414, which is located at the end of the side plate 411 away from the bottom plate 412. By setting the first limiting plate 414, which is located at the end of the side plate 411 away from the bottom plate 412, a lateral limiting structure can be formed at the top of the first support structure 410. When the second support structure 420 is located in the accommodating cavity 413, the first limiting plate 414 can block the second support structure 420, preventing the second support structure 420 from being dislodged from the accommodating cavity 413 due to external forces (such as the thrust or wind force during the installation of the photovoltaic module 100) during installation and use.

[0067] In this first embodiment, as Figure 6 As shown, the first support structure 410 includes a side plate 411 and a bottom plate 412.

[0068] In this second embodiment, as Figure 8 As shown, the first support structure 410 includes a side plate 411, a bottom plate 412, and a first limiting plate 414. The first limiting plate 414 is parallel to the fourth direction and extends towards the center line of the support purlin 400.

[0069] In this third embodiment, as Figure 9 and Figure 10 As shown, the first support structure 410 includes a side plate 411, a bottom plate 412, and two first limiting plates 414. Each side plate 411 is connected to a corresponding first limiting plate 414, and the first limiting plate 414 is located at the end of the side plate 411 away from the bottom plate 412.

[0070] In one embodiment, the second support structure 420 further includes a second limiting plate disposed between the first limiting plate 414 and the support plate 421. The second limiting plate is connected to one end of the support plate 421 opposite to the mating channel 422. By providing the second limiting plate, the second limiting plate can also form a lateral limiting structure. When the second support structure 420 disengages from the receiving cavity 413, the second limiting plate and the first limiting plate 414 abut against each other, increasing the contact area between the first support structure 410 and the second support structure 420, and increasing the blocking force.

[0071] Similarly, in one embodiment, there may be one second limiting plate, and in other embodiments, there may be two second limiting plates, with the two second limiting plates and the two support plates 421 connected accordingly.

[0072] In one embodiment, the length of the second support structure 420 is not less than the length of the first support structure 410. The second support structure 420, with a length not less than that of the first support structure 410, can fully cover or exceed the length of the receiving cavity 413 of the first support structure 410, ensuring that within the roof area fixed by the first support structure 410, the support plate 421 of the second support structure 420 can provide full load support for the frame 120 of the photovoltaic module 100. Simultaneously, the length design allows the mating channel 422 and locking groove 423 of the second support structure 420 to match the first support structure 410 in the length direction, enabling the first drainage channel to be fully distributed along the length of the first support structure 410. This ensures that water accumulated around and in gaps around the photovoltaic module 100 can be smoothly drained along the entire length of the first drainage channel, without any drainage blind spots.

[0073] In one embodiment, the length of the second support structure 420 is less than the length of the first support structure 410. Multiple second support structures 420 are disposed within the receiving cavity 413 of the first support structure 410 and are spaced apart along the length of the receiving cavity 413. The shortened length and spaced arrangement of the second support structures 420 reduce the material usage of the second support structures 420 while ensuring their supporting function, thereby lowering the overall production cost and weight of the support purlin 400 and reducing the load on the roof.

[0074] This application also provides a photovoltaic (PV) integration system, including PV modules and a PV support unit as described above. Multiple support purlins are installed on the roof and spliced ​​together via connectors 700. A clamping block is pressed onto the PV modules and connected to a second support structure via locking components. The PV support unit is installed on the roof, and the PV modules are connected to the support purlins via clamping blocks. The PV support unit can quickly drain rainwater from the surface of the PV modules, preventing damage to the PV modules from roof water accumulation.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A photovoltaic support unit, characterized in that, The photovoltaic support unit includes: Multiple support purlins (400) are provided, each purlin (400) including a first support structure (410) and a second support structure (420). The first support structure (410) is fixed to the roof and has a receiving cavity (413). The second support structure (420) is located in the receiving cavity (413) and is used to support the photovoltaic module (100) that is pressed and matched with the pressure block (200). The second support structure (420) forms a first drainage channel that communicates with the outside. The first drainage channel is used to accommodate a locking member (300) that locks the pressure block (200). Multiple connectors (700) are used to splice adjacent support purlins (400) to connect adjacent first drainage channels.

2. The photovoltaic support unit according to claim 1, characterized in that, The connector (700) has a plug-in interface that engages with the support purlin (400); The connector (700) has a first overlapping portion (710) on its plug-in interface extending along a first direction. The upper surface of the first overlapping portion (710) is in contact with the bottom surface of the adjacent support purlin (400), and the inner wall of the drainage channel of the support purlin (400) is flush with the inner wall of the plug-in interface. The first direction is the direction upward along the roof slope.

3. The photovoltaic support unit according to claim 2, characterized in that, The connector (700) has a second overlapping portion (720) on its plug-in interface extending in the second direction. The lower surface of the second overlapping portion (720) is in contact with the top surface of the adjacent support purlin (400), and the inner wall of the drainage channel of the support purlin (400) is flush with the inner wall of the plug-in interface. The second direction is the direction downward along the roof slope.

4. The photovoltaic support unit according to claim 3, characterized in that, With the bottom of the connector (700) as the reference plane, the height of the overlapping plane of the second overlapping part (720) is higher than the height of the overlapping plane of the first overlapping part (710).

5. The photovoltaic support unit according to claim 1, characterized in that, The connector (700) has a plug-in interface that engages with the support purlin (400); The connector (700) has a third overlapping portion (730) on the plug-in interface extending along a third direction. The upper surface of the third overlapping portion (730) is in contact with the bottom surface of the adjacent support purlin (400), and the inner wall of the drainage channel of the support purlin (400) is flush with the inner wall of the plug-in interface. The third direction is parallel to the ridge direction and perpendicular to the roof slope direction.

6. The photovoltaic support unit according to any one of claims 2-5, characterized in that, The connector (700) is cross-shaped or T-shaped.

7. The photovoltaic support unit according to claim 1, characterized in that, The second support structure (420) includes a support plate (421) and a mounting component connected to each other. The support plate (421) is used to support the photovoltaic module (100) that is pressed and fitted with the pressure block (200). The mounting component is used to accommodate the locking component (300) that locks the pressure block (200). The mounting component forms a first drainage channel that communicates with the outside.

8. The photovoltaic support unit according to claim 7, characterized in that, The first drainage channel includes a mating channel (422) and a locking groove (423). The locking groove (423) is used to accommodate the locking member (300). The dimension of the mating channel (422) along the fourth direction is smaller than the dimension of the locking groove (423) along the fourth direction, so that a stepped surface is formed at the connection between the mating channel (422) and the locking groove (423). The stepped surface is used to restrict the locking member (300) from disengaging from the locking groove (423). The fourth direction is the splicing direction of two adjacent photovoltaic modules (100).

9. The photovoltaic support unit according to claim 8, characterized in that, The outer wall of the second support structure (420) and the cavity wall of the accommodating cavity (413) form a second drainage channel.

10. A photovoltaic integrated system, characterized in that, The system includes a photovoltaic module (100) and a photovoltaic support unit as described in any one of claims 1-9. Multiple support purlins (400) are provided on the roof and spliced ​​together by the connector (700). The pressure block (200) is pressed onto the photovoltaic module (100) and connected to the second support structure (420) by the locking member (300).

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