Roof photovoltaic system and its frame connecting structure

Abstract

The application relates to a roof photovoltaic system and a frame connecting structure thereof. The frame connecting structure comprises a first connecting piece and a second connecting piece, the first connecting piece is fixedly connected with a first frame in a first area, the second connecting piece is connected with a second frame, the second connecting piece is connected with the first connecting piece in a second area, and the first area and the second area at least partially overlap in the thickness direction of a laminated piece. The first area and the second area at least partially overlap in the thickness direction of the laminated piece, that is, the distance between the first area and the second area in the extension direction of the laminated piece can be reduced, that is, the torque borne by the second frame on the second photovoltaic tile is reduced by reducing the force arm, so that the risk of sealant tearing failure between the second frame and the laminated piece is reduced, the risk of water leakage is reduced, and glass sliding is prevented.

Description

Technical Field

[0001] This application relates to the field of building photovoltaic technology, and in particular to rooftop photovoltaic systems and their frame connection structures. Background Technology

[0002] With the development of the photovoltaic industry, large-scale ground-mounted power stations are becoming increasingly common, while prime land resources for photovoltaic power station construction are becoming increasingly scarce. Furthermore, with the promotion of green building in recent years, various regions have introduced BIPV subsidies, making rooftop power stations increasingly popular. BIPV, or Building Integrated Photovoltaics, involves designing, constructing, and putting into use the building simultaneously with it. The rooftop power station becomes an integral part of the building, making it less likely to damage the roof's waterproofing, insulation, and heat insulation structures.

[0003] In related technologies, the frame of photovoltaic tiles is connected to the tile strips using connectors. However, the distance between the connection point between the frame and the connector and the glass groove of the frame is relatively large. When subjected to negative wind loads, the frame is severely torn, easily tearing the frame sealant and causing water leakage. Furthermore, because the laminate is only glued to the frame with sealant, if the frame sealant fails, the laminate and the frame will detach, posing safety risks such as glass slippage. Utility Model Content

[0004] Therefore, it is necessary to provide a roof photovoltaic system and its frame connection structure to address the problem that the sealant of the second frame is easily torn.

[0005] A frame connection structure is provided for connecting two adjacent photovoltaic tiles whose ends overlap each other. The two adjacent photovoltaic tiles include a first photovoltaic tile disposed at the bottom and a second photovoltaic tile whose ends overlap the first photovoltaic tile. Each photovoltaic tile includes a laminate and a first frame and a second frame disposed at both ends of the laminate. The second frame of the second photovoltaic tile is located on the first frame of the first photovoltaic tile.

[0006] The border connection structure includes:

[0007] The first connector is used to be fixedly connected to one end of the second photovoltaic tile near the second frame in a first region;

[0008] A second connector is used to fix it to the roof. The second connector is connected to the first connector in a second region, and the first region and the second region at least partially overlap in the thickness direction of the laminate.

[0009] In one embodiment, the first connector includes an adhesive segment that is bonded to the back surface of the laminate of the second photovoltaic tile.

[0010] In one embodiment, the first connector includes a first hook segment, which is spaced at the bottom of the adhesive segment and hooks with the second connector along the extension direction of the laminate.

[0011] In one embodiment, the first connector includes an extension section and a second hook section connected in sequence, the second hook section being located at the end of the extension section away from the adhesive section, and the second hook section being hooked to the second frame of the second photovoltaic tile along the thickness direction of the laminate.

[0012] In one embodiment, the end of the adhesive segment away from the extension segment is connected to a first hook segment that extends in a direction from the adhesive segment to the extension segment.

[0013] In one embodiment, the second connector includes a hook portion, an mounting portion, and a fixing portion arranged sequentially along the thickness direction of the laminate. The hook portion hooks onto the first connector, the mounting portion is used for overlapping the first frame, and the fixing portion is used for fixing to the roof.

[0014] In one embodiment, the mounting portion has an opening facing the first photovoltaic tile, and the depth of the clearance groove along the extension direction of the laminate is greater than the length of the hook portion along the extension direction of the laminate. The clearance groove is used to provide installation and removal space for the first photovoltaic tile.

[0015] A rooftop photovoltaic system includes a plurality of photovoltaic tiles that are sequentially overlapped along the slope of the roof. Any two adjacent photovoltaic tiles include a first photovoltaic tile disposed at the bottom and a second photovoltaic tile that overlaps the first photovoltaic tile at the end. Each photovoltaic tile includes a laminate and a first frame and a second frame disposed at both ends of the laminate. The second frame of the second photovoltaic tile is located on the first frame of the first photovoltaic tile.

[0016] The second frame is fixed to the roof via the frame connection structure described above.

[0017] In one embodiment, a U-shaped groove is provided on the first frame, and the laminate is embedded in the U-shaped groove and bonded to the U-shaped groove.

[0018] In one embodiment, the second frame includes a bottom wall, a side wall, and a top wall connected in sequence, the top wall being located on the side opposite to the bottom wall, the laminate being located on the bottom wall, and the top wall being located outside the side of the laminate.

[0019] In one embodiment, a sealing strip is provided at the bottom of the second frame, and one end of the sealing strip away from the second frame abuts against the laminate of the first photovoltaic tile.

[0020] In the aforementioned roof photovoltaic system and its frame connection structure, the fixed area (first area) where the first connector is fixedly connected to the second photovoltaic tile near the second frame and the connection area (second area) where the first connector is connected to the second connector at least partially overlap in the thickness direction of the laminate. This reduces the distance between the first area and the second area in the extension direction of the laminate, thereby reducing the torque on the second frame of the second photovoltaic tile by reducing the lever arm. This reduces the risk of sealant tearing failure between the second frame and the laminate, reduces the risk of water leakage, and prevents the glass from slipping. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a rooftop photovoltaic system in one embodiment.

[0022] Figure 2 This is a schematic diagram of the structure in one embodiment where the frame connection structure connects the first photovoltaic tile and the second photovoltaic tile.

[0023] Attached reference numerals: 10. Roof; 11. Batten;

[0024] 100. First connector; 110. Adhesive section; 120. First hook section; 130. Extension section; 140. Extension section; 130. Second hook section;

[0025] 200. Second connector; 210. Hook connection; 220. Mounting part; 221. Clearance groove; 230. Fixing part;

[0026] 300, photovoltaic tile; 310, first photovoltaic tile; 320, second photovoltaic tile; 330, first frame; 331, U-shaped groove; 340, laminate; 350, second frame; 351, bottom wall; 352, side wall; 353, top wall. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] The installation of photovoltaic tiles on the roof is often achieved by end-overlapping installation. Specifically, the roof is set at an angle, and along the angle of the roof, there are tile strips spaced apart on the roof. Two adjacent photovoltaic tiles include a first photovoltaic tile set at the bottom and a second photovoltaic tile that overlaps the first photovoltaic tile at the end. Each photovoltaic tile includes a laminate and a first frame and a second frame respectively set at both ends of the laminate. The second frame of the second photovoltaic tile is located on the first frame of the first photovoltaic tile. During installation, the second frame is first hooked to the connector using hooks, and then the connector is fixed to the corresponding tile strip.

[0034] In related technologies, when there is a significant eccentricity between the connection point of the connector and the hook and the glass groove of the second frame, it means that there is a significant distance difference between the point of force application (the connection point) and the center of force equilibrium of the second frame (the glass groove). This distance is the lever arm. When subjected to a negative wind load, the wind load will act on the second frame through the laminate. At this time, the connection point will exert a resistance force on the second frame to balance the wind load. Due to the significant eccentricity between the two, the point of application of the resistance force and the point of force application of the wind load are not on the same straight line, which will form a moment around the center of force. The greater the eccentricity, the longer the lever arm, and the greater the torque generated under the same negative wind load. The second frame will also bear a more severe torsional force, which will make the sealant of the glass groove prone to tearing, causing water leakage.

[0035] See Figure 1 and Figure 2An embodiment of this application provides a frame connection structure for connecting two adjacent photovoltaic tiles 300 whose ends overlap. The two adjacent photovoltaic tiles 300 include a first photovoltaic tile 310 disposed at the bottom and a second photovoltaic tile 320 whose ends overlap the first photovoltaic tile 310. Each photovoltaic tile 300 includes a laminate 340 and a first frame 330 and a second frame 350 disposed at both ends of the laminate 340. The second frame 350 of the second photovoltaic tile 320 is located on the first frame 330 of the first photovoltaic tile 310. The frame connection structure includes a first connector 100 and a second connector 200. The first connector 100 is fixedly connected to one end of the second photovoltaic tile 320 near the second frame 350 in a first region. The second connector 200 is fixed to the roof and is connected to the first connector 100 in a second region. The first region and the second region at least partially overlap in the thickness direction of the laminate 340.

[0036] In this embodiment, the first connector 100 is fixedly connected to the end of the second photovoltaic tile 320 near the second frame 350. The first connector 100 is connected to the second connector 200, which is fixed to the roof. That is, the end of the second photovoltaic tile 320 near the first frame 330 can be connected to the roof sequentially via the first connector 100 and the second connector 200. Since the second frame 350 is located on the lower side of the corresponding photovoltaic tile 300 and presses against the first frame 330, fixing the second frame 350 to the roof is sufficient to fix the entire photovoltaic tile to the roof, making the connection method simple.

[0037] The fixed area (first region) where the first connector 100 is fixedly connected to the side of the second photovoltaic tile 320 near the second frame 350 and the connection area (second region) where the first connector 100 is connected to the second connector 200 overlap at least partially in the thickness direction of the laminate 340. This reduces the distance between the first region and the second region in the extension direction of the laminate. In other words, by reducing the lever arm, the torque on the second frame 350 on the second photovoltaic tile 320 is reduced, thereby reducing the risk of sealant tearing failure between the second frame 350 and the laminate 340, reducing the risk of water leakage, and preventing the glass from slipping.

[0038] In some embodiments, the first connector 100 includes an adhesive section 110, which is bonded to the backlight surface of the laminate 340 of the second photovoltaic tile 320. The adhesive method is simple and enables rapid connection between the first connector 100 and the backlight surface of the laminate 340.

[0039] Specifically, the first connector 100 is bonded to the back surface of the laminate 340 using structural adhesive. The adhesive strength of the structural adhesive is greater than that of the sealant, and the structural adhesive can be used to bear structural stress for a long time, thereby reducing the risk of structural adhesive tearing.

[0040] For example, the adhesive section 110 is provided with baffles on both sides along the extension direction of the laminate 340, so that the baffles and the adhesive section 110 form a groove to accommodate the structural adhesive, ensure the amount of structural adhesive used, and avoid waste of structural adhesive.

[0041] In some embodiments, the first connector 100 includes a first hook segment 120, which is spaced at the bottom of the adhesive segment 110, and the first hook segment 120 is hooked to the second connector 200 along the extension direction of the laminate 340.

[0042] In this embodiment, the first hook segment 120 is spaced at the bottom of the adhesive segment 110 so that the first hook segment 120 and the adhesive segment 110 overlap in the thickness direction of the laminate 340, that is, the first region overlaps with the second region, with no eccentric force or a small eccentric force, thereby reducing the risk of the sealant tearing at the glass groove of the second frame 350.

[0043] In some embodiments, one end of the adhesive segment 110 away from the extension segment 140 is connected to the first hook segment 120, which extends in a direction from the adhesive segment 110 to the extension segment 140.

[0044] In this embodiment, the photovoltaic tile 300 is used to be laid on the sloping roof 10. For the same photovoltaic tile 300, the second frame 350 is located at the lower end of the corresponding laminate 340, and the first end is located at the higher end of the corresponding laminate 340. At this time, the first hook segment 120 extends along the direction from the adhesive segment 110 to the extension segment 140, that is, the first hook segment 120 extends towards the lower side. This arrangement causes the first hook segment 120 to tend to slide towards the lower side when it is hooked onto the second connector 200, because the photovoltaic tile 300 is laid on the sloping roof 10, it will be subjected to a component of gravity that is inclined downward along the roof 10. The first hook section 120 extends towards the lower side, and its hook part 210 can fit tightly with the second connector 200. The second connector 200 will generate a reverse blocking force on the first hook section 120, thereby effectively preventing the first hook section 120 from disengaging.

[0045] In some embodiments, the first connector 100 includes an extension 140 and a second hook section 130 connected in sequence. The second hook section 130 is located at the end of the extension 140 away from the adhesive section 110. The second hook section 130 is hooked to the second frame 350 of the second photovoltaic tile 320 along the thickness direction of the laminate 340.

[0046] In this embodiment, the extension segment 140 serves to maintain a distance between the first hook segment 120 and the second hook segment 130, providing sufficient space for the hooking of the second connecting segment and the first hook segment 120, ensuring that they can hook smoothly. The first hook segment 120 hooks with the second frame 350 of the second photovoltaic tile 320 along the thickness direction of the laminate 340. This thickness-direction hooking method further restricts the relative displacement of the two in the planar direction. Combined with the design of the first hook segment 120 extending to the lower side, multiple constraints are formed, significantly improving the stability of the connection structure.

[0047] Furthermore, the second hook section 130 and the second frame 350 are designed separately, so the force will not be transmitted to the second frame 350 and will not affect the sealing effect of the sealant in the glass groove of the second frame 350. The force transmission path is clear, and the structural adhesive and sealant each perform their respective functions, which is a reasonable design.

[0048] For example, the bottom of the second frame 350 is provided with a protrusion, and the first hook section 120 is bent to form an upward-facing U-shaped groove. The protrusion extends into the U-shaped groove, thereby hooking the first hook section 120 with the second frame 350 of the second photovoltaic tile 320 along the thickness direction of the laminate 340.

[0049] Of course, in other embodiments, the extension section 140 can be omitted, and a first hook section 120 can be provided at one end of the adhesive section 110 and a second hook section 130 can be provided at the other end. This can increase the bonding length between the adhesive section 110 and the laminate 340 and increase the connection strength to the laminate 340.

[0050] In some embodiments, the second connector 200 includes a hook portion 210, a mounting portion 220 and a fixing portion 230 arranged sequentially along the thickness direction of the laminate 340. The hook portion 210 hooks with the first connector 100, the first frame 330 is used to overlap the mounting portion 220, and the fixing portion 230 is used to fix to the roof 10.

[0051] In this embodiment, the hook portion 210 extends in the opposite direction to the first hook section 120, so that the first connector 100 and the second connector 200 are hooked to the first hook section 120 through the hook portion 210. This reverse extension design allows the hook portion 210 and the first hook section 120 to form an "interlocking" structure. When the two are hooked, they can restrain each other from opposite directions, greatly reducing the possibility of disengagement due to external impact or long-term use, and significantly improving the reliability of the connection. At the same time, the fixing portion 230 is fixedly connected to the tile strip 11 by self-tapping screws. This connection method is not only easy to operate and improves installation efficiency, but also the self-tapping screws can provide strong fastening force to ensure that the connection between the second connector 200 and the tile strip 11 is firm, effectively resisting the displacement tendency of the photovoltaic tile 300 under its own weight, wind force and other loads, further ensuring the structural stability of the entire photovoltaic tile 300 laying system.

[0052] The hook portion 210, mounting portion 220, and fixing portion 230 are arranged sequentially along the thickness direction of the laminate 340. This arrangement allows force to be transmitted in an orderly manner along the thickness direction of the laminate 340. After the hook portion 210 hooks with the first connector 100 to receive force, the force can be transmitted sequentially through the mounting portion 220 to the fixing portion 230, and then from the fixing portion 230 to the roof 10. This makes the force transmission path more direct and smooth, reduces force loss and offset during transmission, and avoids excessive local force concentration.

[0053] Furthermore, the mounting part 220 has an opening facing the first photovoltaic tile 310, and the depth of the clearance groove 221 along the extension direction of the laminate 340 is greater than the length of the hook part 210 along the extension direction of the laminate 340. The clearance groove 221 is used to provide installation and disassembly space for the first photovoltaic tile 310.

[0054] For example, when disassembling the photovoltaic tile 300, the second photovoltaic tile 320 is pushed to tilt upwards, causing the first frame 330 of the second photovoltaic tile 320 to move towards the side closer to the bottom of the groove, thereby allowing the first hook section 120 and the hook part 210 to quickly disengage. The first frame 330 overlaps the side of the second connector 200 near the groove opening, that is, the space between the overlapping position of the first frame 330 and the bottom of the clearance groove 221, so that the first frame 330 of the second photovoltaic tile 320 can move towards the side closer to the bottom of the groove.

[0055] One embodiment of this application also discloses a roof photovoltaic system, which includes a plurality of photovoltaic tiles 300 sequentially overlapping along the slope direction of the roof. Any two adjacent photovoltaic tiles 300 include a first photovoltaic tile 310 disposed at the bottom and a second photovoltaic tile 320 whose ends overlap the first photovoltaic tile 310. Each photovoltaic tile 300 includes a laminate 340 and a first frame 330 and a second frame 350 disposed at both ends of the laminate 340. The second frame 350 of the second photovoltaic tile 320 is located on the first frame 330 of the first photovoltaic tile 310. The second frame 350 is fixed to the roof by the aforementioned frame connection structure.

[0056] In this embodiment, multiple photovoltaic tiles 300 are overlapped sequentially along the slope of the roof. This orderly overlapping method effectively blocks the gaps between the photovoltaic tiles 300, further enhancing the waterproof effect of the system and preventing rainwater from seeping into the roof through the connection points between the photovoltaic tiles 300, thus protecting the roof structure from rainwater erosion.

[0057] In some embodiments, a U-shaped groove 331 is provided on the first frame 330, and the laminate 340 is embedded in the U-shaped groove 331 and bonded to the U-shaped groove 331.

[0058] In this embodiment, firstly, the U-shaped groove structure allows the laminate 340 to stably transfer force to the upper and lower walls of the groove opening when subjected to positive and negative wind loads. This force transfer method is more balanced, avoiding excessive local stress that could damage the frame or laminate 340, thus enhancing the overall structural load-bearing capacity of the photovoltaic tile 300 and making the system more stable when facing different wind directions and forces. Secondly, the laminate 340 is embedded in the U-shaped groove and bonded to the groove opening with sealant, forming a reliable waterproof line. The U-shaped groove has good sealing properties, effectively preventing rainwater infiltration. Combined with the sealing effect of the sealant, it further improves the waterproof effect at the connection between the first frame 330 and the laminate 340, reducing the risk of roof damage caused by water leakage.

[0059] In some embodiments, the second frame 350 includes a bottom wall 351, a side wall 352 and an upper wall 353 connected in sequence. The upper wall 353 is located on the side opposite to the bottom wall 351. The laminate 340 is located on the bottom wall 351 and the upper wall 353 is located outside the side of the laminate 340.

[0060] In this embodiment, the upper wall 353 is located outside the side of the laminate 340, which can avoid shading the top of the laminate 340 and improve the light conversion efficiency of the photovoltaic module. When the laminate 340 is subjected to a positive wind load, the negative wind load is borne by the bottom wall 351; when the laminate 340 is subjected to a negative wind load, the negative wind load is borne by the adhesive part and the first hook part.

[0061] The bottom wall 351, side wall 352 and top wall 353 are used to form a semi-enclosed space outside the side of the laminate 340. When the sealant is filled, the sealant cannot be discharged from the top and can only flow downward, thus ensuring that the sealant can fill the entire cavity.

[0062] In addition, the side wall 352 and the bottom wall 351 are set at an acute angle to reduce the width of the upper wall 353, that is, to reduce the width of the frame and improve the overall aesthetics of the photovoltaic tile 300.

[0063] In some embodiments, a sealing strip is provided at the bottom of the second frame 350, and one end of the sealing strip away from the second frame 350 abuts against the laminate 340 of the first photovoltaic tile 310.

[0064] In this embodiment, a T-shaped groove is provided at the bottom of the second frame 350. One end of the sealing strip is fitted into the T-shaped groove structure to be embedded in the T-shaped groove. The other end of the sealing strip is bonded to the laminate 340 of the first photovoltaic tile 310 to achieve waterproofing.

[0065] In some embodiments, the bottom wall 351 of both the first frame 330 and the second frame 350 is provided with a corner code cavity. The corner code cavity of the first frame 330, the first connector 100, part of the second connector 200 and the laminate 340 of the first photovoltaic tile 310 are arranged in a rectangular frame to increase the stability of the second frame 350.

[0066] In some embodiments, each laminate 340 is connected to the roofing strip 11 at both ends along its length via a first connector 100 and a second connector 200, respectively. That is, the length of the first connector 100 is less than the length of the laminate 340, and the connection is only made at both ends, which can reduce material consumption.

[0067] The extension direction of the laminate 340 can be considered as the width direction of the laminate 340.

[0068] 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.

[0069] The embodiments described above are merely illustrative of 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 frame connection structure, characterized in that, The frame connection structure is used to connect two adjacent photovoltaic tiles whose ends overlap each other. The two adjacent photovoltaic tiles include a first photovoltaic tile disposed at the bottom and a second photovoltaic tile whose ends overlap the first photovoltaic tile. Each photovoltaic tile includes a laminate and a first frame and a second frame disposed at both ends of the laminate. The second frame of the second photovoltaic tile overlaps the first frame of the first photovoltaic tile. The border connection structure includes: The first connector is used to be fixedly connected to one end of the second photovoltaic tile near the second frame in a first region; A second connector is used to fix it to the roof. The second connector is connected to the first connector in a second region, and the first region and the second region at least partially overlap in the thickness direction of the laminate.

2. The frame connection structure according to claim 1, characterized in that, The first connector includes an adhesive section, which is bonded to the back surface of the laminate of the second photovoltaic tile.

3. The frame connection structure according to claim 2, characterized in that, The first connector includes a first hook segment, which is spaced at the bottom of the adhesive segment and hooks with the second connector along the extension direction of the laminate.

4. The frame connection structure according to claim 2, characterized in that, The first connector includes an extension section and a second hook section connected in sequence. The second hook section is located at the end of the extension section away from the adhesive section. The second hook section is hooked to the second frame of the second photovoltaic tile along the thickness direction of the laminate.

5. The frame connection structure according to claim 4, characterized in that, The end of the adhesive segment away from the extension segment is connected to the first hook segment, which extends in the direction from the adhesive segment to the extension segment.

6. The frame connection structure according to claim 1, characterized in that, The second connector includes a hook portion, an mounting portion, and a fixing portion arranged sequentially along the thickness direction of the laminate. The hook portion hooks with the first connector, the mounting portion is used for overlapping the first frame, and the fixing portion is used for fixing to the roof.

7. The frame connection structure according to claim 6, characterized in that, The mounting portion has an opening facing the first photovoltaic tile, and the depth of the clearance groove along the extension direction of the laminate is greater than the length of the hook portion along the extension direction of the laminate. The clearance groove is used to provide installation and disassembly space for the first photovoltaic tile.

8. A rooftop photovoltaic system, characterized in that, The roof photovoltaic system includes multiple photovoltaic tiles that are sequentially overlapped along the slope of the roof. Any two adjacent photovoltaic tiles include a first photovoltaic tile set at the bottom and a second photovoltaic tile that overlaps the first photovoltaic tile at the end. Each photovoltaic tile includes a laminate and a first frame and a second frame respectively set at both ends of the laminate. The second frame of the second photovoltaic tile is located on the first frame of the first photovoltaic tile. The second frame is fixed to the roof by the frame connection structure as described in any one of claims 1-7.

9. A rooftop photovoltaic system according to claim 8, characterized in that, A U-shaped groove is provided on the first frame, and the laminate is embedded in the U-shaped groove and bonded to the U-shaped groove.

10. A rooftop photovoltaic system according to claim 8, characterized in that, The second frame includes a bottom wall, a side wall, and a top wall connected in sequence. The top wall is located on the side opposite to the bottom wall. The laminate is located on the bottom wall, and the top wall is located outside the side of the laminate.

11. A rooftop photovoltaic system according to claim 8, characterized in that, A sealing strip is provided at the bottom of the second frame, and the end of the sealing strip away from the second frame abuts against the laminate of the first photovoltaic tile.

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