Photovoltaic module mounting structure and photovoltaic roofing system

Abstract

The present application discloses a photovoltaic module mounting structure and a photovoltaic roofing system. The photovoltaic module mounting structure comprises photovoltaic modules and connecting frames; each connecting frame comprises a first connecting portion and a second connecting portion arranged opposite to each other; the first connecting portions are bonded to the photovoltaic modules; the second connecting portions are bonded to roof panels in a roofing structure; each second connecting portion comprises two connecting sections; an opening is formed between every two connecting sections; the end of each connecting section close to the corresponding opening is connected to a bending portion extending towards the corresponding first connecting portion; the end of each connecting section away from the corresponding opening is connected to the corresponding first connecting portion by means of a side portion; and a clearance space extending to the corresponding opening is formed between the two bending portions in each connecting frame, and the clearance space in at least one connecting frame is used for accommodating a protrusion structure in the roofing structure. Embodiments of the present application can improve the wind uplift resistance of the photovoltaic roofing system comprising the photovoltaic module mounting structure.

Description

Photovoltaic module installation structure and photovoltaic roof system

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese Patent Application No. 202520110504.2, filed on January 16, 2025, entitled "Photovoltaic Module Installation Structure and Photovoltaic Roofing System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of photovoltaic technology, and in particular to a photovoltaic module installation structure and a photovoltaic roof system. Background Technology

[0004] In the implementation of photovoltaic power generation, in order to save installation space, photovoltaic modules are often installed on the roof.

[0005] In related technologies, the common method for installing photovoltaic modules on a roof is as follows: first, install a clamp on the roof, then install a guide rail on the clamp, and finally install the photovoltaic modules on the guide rail.

[0006] In the photovoltaic roof system formed by installing the aforementioned photovoltaic modules on the roof, the clamps are held in place on the roof. However, the clamps are prone to detaching from the roof, resulting in poor wind uplift resistance of the photovoltaic roof system.

[0007] Application content

[0008] This application provides a photovoltaic module installation structure and a photovoltaic roof system, which aims to at least solve the problem of poor wind uplift resistance of existing photovoltaic roof systems.

[0009] Some embodiments of this application provide a photovoltaic module mounting structure, including a photovoltaic module and a connecting frame. The connecting frame includes a first connecting part and a second connecting part disposed opposite to each other. The first connecting part is bonded to the photovoltaic module, and the second connecting part is used to bond to a roof panel in a roof structure.

[0010] The second connecting part includes two connecting segments, with an opening formed between the two connecting segments. The end of the connecting segment near the opening is connected to a bent portion extending toward the first connecting part, and the end of the connecting segment away from the opening is connected to the first connecting part through a side portion.

[0011] A clearance space extending to an opening is formed between two bends in the connecting frame. The clearance space in at least one connecting frame is used to accommodate a protruding structure in the roof structure. The protruding structure protrudes from the roof bonding surface in the roof panel for bonding with the second connecting part.

[0012] In some embodiments, a first protrusion is provided on the surface of the connecting segment opposite to the first connecting portion;

[0013] The connecting section is bonded to the roof bonding surface with adhesive, and the thickness of the adhesive between the connecting section and the roof bonding surface is greater than or equal to the height of the first protrusion.

[0014] In some embodiments, the size of the first protrusion is smaller than the width of the connecting segment along the width direction of the connecting frame;

[0015] The number of first protrusions provided on a connecting section is multiple. The multiple first protrusions are distributed in a scattered manner along the length direction of the connecting frame, or the first protrusions are strip-shaped and the length direction of the first protrusions is parallel to the length direction of the connecting frame.

[0016] In some embodiments, a second protrusion is provided on the first connecting portion, the second protrusion being used for positioning the side of the photovoltaic module;

[0017] The second protrusion, which is higher than the top surface of the first connection part, is also used to limit the side of the photovoltaic module.

[0018] In some embodiments, the first connecting portion has an adhesive groove, the opening of which faces away from the second connecting portion.

[0019] The second protrusion is located inside the adhesive groove.

[0020] In some embodiments, a connecting frame is bonded to multiple photovoltaic modules.

[0021] In some embodiments, the angle between the bent portion and the connecting segment is greater than 0° and less than 90°.

[0022] In some embodiments, the end of the bent portion away from the connecting section is connected with a folded edge;

[0023] The folded edge and the bent part are close to the surface of the connecting section.

[0024] In some embodiments, the end of the first connecting portion is connected to the side portion by a first fillet;

[0025] The radius of the first fillet is greater than or equal to 3 times the wall thickness of the first connecting part, and less than or equal to 6 times the wall thickness of the first connecting part.

[0026] In some embodiments, the connecting frame further includes a reinforcing rib, one end of which is connected to the first connecting portion and the other end of which is connected to the side portion.

[0027] Some embodiments of this application provide a photovoltaic roofing system, including a roof structure and the photovoltaic module mounting structure described above, wherein the roof structure includes roof panels.

[0028] In some embodiments, the roof panel has a roof bonding surface that is bonded to a connecting frame in the photovoltaic module mounting structure; the roof panel includes a base portion and a protrusion, and the roof bonding surface is the top plane of the protrusion, or the roof panel includes a base portion, and the roof bonding surface is the top plane of the base portion.

[0029] The roof structure includes at least one protruding structure protruding from the roof bonding surface; the protruding structure includes a seam structure in the roof panel and / or a corner portion of an angled intermediate protrusion in the roof panel protruding from the roof bonding surface; or, the roof structure also includes fasteners and roof purlins, the roof panel being connected to the roof purlins by fasteners, the protruding structure being the head of the fastener.

[0030] In some embodiments, the length direction of the connecting frame is parallel to the extension direction of the roof panel;

[0031] Along the extension direction of the roof panel, the connecting frame on a roof panel is a single strip, or the connecting frame is divided into multiple segments.

[0032] In this embodiment, the photovoltaic module is bonded to the roof panel via a connecting frame. The bonding between the connecting frame and the photovoltaic module and the roof panel is a surface bonding, which increases the bonding area between the connecting frame and the photovoltaic module and the roof panel, making it difficult for the photovoltaic module to detach from the connecting frame and for the connecting frame to detach from the roof panel. This improves the wind uplift resistance of the photovoltaic roof system including the photovoltaic module installation structure.

[0033] Furthermore, when the connecting frame only has an opening between the two connecting sections, the opening is sealed after the connecting frame is bonded to the roof panel. The connecting frame and the roof panel form a circumferentially closed cavity, which can improve the overall strength of the connecting frame and the roof panel, and further enhance the wind uplift resistance of the photovoltaic roof system including the photovoltaic module mounting structure. In addition, the addition of the bending section can enhance the strength of the connecting frame and reduce its deformation. Moreover, compared with the method of installing photovoltaic modules using components such as clamps, guide rails, pressure blocks, bolts, nuts, and washers, in this embodiment, the photovoltaic modules can be fixed using only the connecting frame and adhesive, resulting in a simple structure, fewer components, and lower cost.

[0034] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0035] Figure 1 is a schematic diagram of the photovoltaic module installation structure and roof structure provided in some embodiments of this application;

[0036] Figure 2 is a schematic diagram of the disassembly structure of the photovoltaic module installation structure and the roof structure provided in some embodiments of this application;

[0037] Figure 3 is a schematic diagram of the photovoltaic module installation structure and roof structure provided in some embodiments of this application;

[0038] Figure 4 is a schematic diagram of the photovoltaic module installation structure and roof structure provided in some embodiments of this application.

[0039] Figure 5 is a schematic diagram of the photovoltaic module installation structure and roof structure provided in some embodiments of this application;

[0040] Figure 6 is a schematic diagram of the photovoltaic module installation structure and roof structure provided in some embodiments of this application;

[0041] Figure 7 is a schematic diagram of the photovoltaic module installation structure and roof structure provided in some embodiments of this application.

[0042] Figure 8 is a schematic diagram of the photovoltaic module installation structure and roof structure provided in some embodiments of this application;

[0043] Figure 9 is a schematic diagram of the connecting frame in the photovoltaic module mounting structure provided in some embodiments of this application;

[0044] Figure 10 is a schematic diagram of the connecting frame in the photovoltaic module mounting structure provided in some embodiments of this application;

[0045] Figure 11 is a schematic diagram of the connecting frame in the photovoltaic module mounting structure provided in some embodiments of this application;

[0046] Figure 12 is a front perspective view of the connecting frame in the photovoltaic module mounting structure provided in some embodiments of this application;

[0047] Figure 13 is an enlarged view of point A in Figure 12;

[0048] Figure 14 is a schematic diagram of a partial flange in the connecting frame of a photovoltaic module mounting structure provided in some embodiments of this application;

[0049] Figure 15 is a three-dimensional back view of the connecting frame in the photovoltaic module mounting structure provided in some embodiments of this application;

[0050] Figure 16 is an enlarged view of point B in Figure 15;

[0051] Figure 17 is a schematic diagram of the structure of the roof panel in a photovoltaic roof system provided in some embodiments of this application;

[0052] Figure 18 is a perspective view of multiple roof panels in a photovoltaic roof system provided in some embodiments of this application;

[0053] Figure 19 is a perspective view of the roof panel and connecting frame in a photovoltaic roof system provided in some embodiments of this application;

[0054] Figure 20 is a perspective view of the roof panel, connecting frame and photovoltaic module in a photovoltaic roof system provided in some embodiments of this application;

[0055] Figure 21 is an enlarged view of point C in Figure 20.

[0056] Reference numerals: 1-Photovoltaic module, 2-Connecting frame, 201-First connecting part, 2011-Adhesive groove, 2012-Top surface, 202-Second connecting part, 2021-Connecting section, 203-Side part, 204-Bending part, 205-Opening, 206-First protrusion, 207-Second protrusion, 2071-Protrusion, 2072-Partial flange, 208-Folded edge, 209-First rounded corner, 210-Reinforcing rib, 211-Avoidance space, 3-Roof panel, 301-Bottom plate, 302-Protrusion, 3021-Semi-trapezoidal protrusion, 3022-Angled middle protrusion, 3023-Trapezoidal protrusion, 303-Seam locking structure, 304-Roof bonding surface, 4-Fastener, 5-Roof purlin, 6-Edge support, 7-Adhesive. Detailed Implementation

[0057] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0058] Referring to Figures 1 to 11, some embodiments of this application disclose a photovoltaic module mounting structure, including a photovoltaic module 1 and a connecting frame 2. The connecting frame 2 includes a first connecting portion 201 and a second connecting portion 202 disposed opposite to each other. The first connecting portion 201 is bonded to the photovoltaic module 1, and the second connecting portion 202 is used to bond to a roof panel 3 in a roof structure. The second connecting portion 202 includes two connecting segments 2021, with an opening 205 formed between the two connecting segments 2021. One end of the connecting segment 2021 near the opening 205 is connected to a bent portion 204 extending toward the first connecting portion 201, and the other end of the connecting segment 2021 away from the opening 205 is connected to the first connecting portion 201 through a side portion 203. An obstacle space 211 extending to the opening 205 is formed between the two bent portions 204 in the connecting frame 2. The obstacle space 211 in at least one connecting frame 2 is used to accommodate a protruding structure in the roof structure. The protruding structure protrudes from the roof bonding surface 304 in the roof panel 3 used for bonding with the second connecting portion 202.

[0059] In this embodiment, the photovoltaic module 1 is preferably a frameless photovoltaic module to prevent dust accumulation. The photovoltaic module 1 has opposing light-receiving and back-lighting surfaces. The light-receiving surface is the side of the photovoltaic module that absorbs sunlight, i.e., the front side of the photovoltaic module, and the back-lighting surface is the back side of the photovoltaic module. When the photovoltaic module 1 is a frameless photovoltaic module, the back-lighting surface of the photovoltaic module 1 is directly bonded to the connecting frame 2. The connecting frame 2 can be made of steel, aluminum alloy, fiber-reinforced composite materials, etc. The function of the connecting frame 2 is to provide an adhesive surface for the photovoltaic module 1. One connecting frame 2 can be bonded to multiple photovoltaic modules 1; for example, one connecting frame 2 can be bonded to 2, 3, 4, 5, etc., photovoltaic modules 1. In other embodiments, one connecting frame 2 can also be bonded to a single photovoltaic module 1.

[0060] Referring to Figure 18, the roof structure includes multiple roof panels 3, which are arranged along the width direction of the roof panels 3. When the connecting frame 2 is bonded to the roof panel 3, the width direction of the connecting frame 2 is parallel to the width direction of the roof panel 3. A connecting frame 2 can be bonded to two adjacent roof panels 3, or it can be bonded to a single roof panel 3.

[0061] The second connecting part 202 is specifically used to bond with the roof bonding surface 304 in the roof panel 3. The two connecting segments 2021 in the second connecting part 202 are respectively bonded to the two roof bonding surfaces 304, which are located on both sides of the protruding structure along the width direction of the roof panel 3. When a connecting frame 2 is bonded to two adjacent roof panels 3, the two roof bonding surfaces 304 are the surfaces on the two adjacent roof panels 3.

[0062] The bent portion 204 is angled to the connecting section 2021. The angle between the bent portion 204 and the connecting section 2021 can be a right angle or an acute angle. Along the height direction of the connecting frame 2, the height of the bent portion 204 is less than the height of the side portion 203. Preferably, the height of the bent portion 204 is less than half the height of the side portion 203.

[0063] The connecting frame 2 itself has a cavity extending along its length, and the opening 205 communicates with the cavity. Preferably, the connecting frame 2 has only one opening 205 located between two connecting sections 2021 to ensure the structural strength of the connecting frame 2. The clearance space 211 is specifically shown in the area indicated by the dashed box in Figure 9. The protruding structures in the roof structure are spaced apart along the width direction of the roof panel 3. This photovoltaic module mounting structure includes multiple connecting frames 2. Referring to Figures 1 to 7, when some connecting frames 2 are bonded to the roof panel 3, the clearance space 211 in the connecting frame 2 accommodates the protruding structures in the roof structure. Referring to Figure 8, when some connecting frames 2 are bonded to the roof panel 3, the clearance space 211 in the connecting frame 2 does not accommodate the protruding structures in the roof structure.

[0064] When the photovoltaic module 1 is fixed to the roof panel 3 via the connecting frame 2, the connecting frame 2 is first glued to the roof panel 3, and then the photovoltaic module 1 is glued to the first connecting part 201 in the connecting frame 2. When the connecting frame 2 is glued to the roof panel 3, the protruding structure extends through the opening 205 into the clearance space 211, thereby allowing the second connecting part 202 in the connecting frame 2 to be glued to the roof bonding surface 304 in the roof panel 3.

[0065] Photovoltaic module 1 is bonded to the first connecting part 201 via adhesive 7, and roof bonding surface 304 is bonded to connecting section 2021 via adhesive 7. When connecting frame 2 is bonded to roof panel 3, adhesive lines need to be applied to roof bonding surface 304 first. These lines can be applied continuously or in sections. When photovoltaic module 1 is bonded to connecting frame 2, adhesive lines need to be applied to the first connecting part 201 first. These lines can be applied continuously or in sections. Applying adhesive in sections reduces adhesive costs while ensuring bonding strength.

[0066] Before applying adhesive lines to the roof bonding surface 304, the surface should be cleaned first, and then a primer should be applied. The primer enhances the adhesion of the roof bonding surface 304, thereby strengthening the bond between the connecting frame 2 and the roof panel 3. It should be noted that for painted roof panels 3, the paint on the roof bonding surface 304 needs to be removed before cleaning, and touch-up painting should be applied to the roof panel 3 after the connecting frame 2 is bonded to it.

[0067] In related technologies, photovoltaic modules 1 are installed using components such as clamps, guide rails, pressure blocks, bolts, nuts, and washers. However, the clamps hold the modules on the roof surface, which can easily damage it. In this embodiment, the connecting frame 2 is only bonded to the roof panel 3 with adhesive 7, minimizing damage to the coating and substrate of the roof panel 3.

[0068] In related technologies, when photovoltaic modules 1 are installed using components such as clamps, guide rails, pressure blocks, bolts, nuts, and washers, the fixing points of photovoltaic modules 1 are distributed in a point-like manner, resulting in poor wind uplift resistance of the photovoltaic roof system. In related technologies, due to the presence of protruding structures, when photovoltaic modules 1 are directly bonded to the roof panel 3, the photovoltaic modules 1 make line contact with the protruding structures, making bonding difficult. Even when bonded, the bonding area between the photovoltaic modules 1 and the roof panel 3 is small. In this embodiment, the photovoltaic modules 1 are bonded to the roof panel 3 via a connecting frame 2. The bonding between the connecting frame 2 and the photovoltaic modules 1 and the roof panel 3 is a surface bonding, which increases the bonding area between the connecting frame 2 and the photovoltaic modules 1 and the roof panel 3. This makes it difficult for the photovoltaic modules 1 to detach from the connecting frame 2, and the connecting frame 2 to detach from the roof panel 3, thereby improving the wind uplift resistance of the photovoltaic roof system including this photovoltaic module installation structure.

[0069] Furthermore, when the connecting frame 2 only has an opening 205 located between the two connecting sections 2021, after the connecting frame 2 is bonded to the roof panel 3, the opening 205 is sealed, and the connecting frame 2 and the roof panel 3 form a circumferentially closed cavity. This enhances the overall strength of the connecting frame 2 and the roof panel 3, further improving the wind uplift resistance of the photovoltaic roof system, including the photovoltaic module installation structure. In addition, the bending portion 204 enhances the strength of the connecting frame 2 and reduces its deformation. Moreover, compared to installing photovoltaic modules using clamps, guide rails, pressure blocks, bolts, nuts, washers, and other components, in this embodiment, the photovoltaic module 1 can be fixed using the connecting frame 2 and adhesive 7. This method is simple in structure, has fewer components, lower cost, and higher construction efficiency.

[0070] When the connecting frame 2 is bonded to the roof panel 3, and the clearance space 211 in the connecting frame 2 accommodates the protruding structure in the roof structure, the protruding structure is located below the first connecting part 201 and between the two side parts 203. In this case, the connecting frame 2 can protect the protruding structure. When the connecting frame 2 is bonded to the roof panel 3, and the clearance space 211 in the connecting frame 2 accommodates the protruding structure in the roof structure, the connecting frame 2 can specifically enhance the strength of the area near the protruding structure in the roof structure.

[0071] In some embodiments, a first protrusion 206 is provided on the surface of the connecting segment 2021 facing away from the first connecting portion 201; the thickness of the adhesive 7 between the connecting segment 2021 and the roof bonding surface 304 is greater than or equal to the height of the first protrusion 206.

[0072] The first protrusion 206 can be a dotted structure, a block structure, a strip shape, etc. The first protrusion 206 can be bonded to the roof bonding surface 304 using adhesive 7. In this case, the thickness of the adhesive 7 between the connecting section 2021 and the roof bonding surface 304 is greater than the height of the first protrusion 206. In this embodiment, the first protrusion 206 ensures the thickness of the adhesive 7 between the connecting section 2021 and the roof bonding surface 304, thereby guaranteeing the bonding strength between the connecting frame 2 and the roof panel 3.

[0073] In some embodiments, the size of the first protrusion 206 is smaller than the width of the connecting segment 2021 along the width direction of the connecting frame 2. Referring to Figures 15 and 16, there are multiple first protrusions 206 provided on a connecting segment 2021. The multiple first protrusions 206 are distributed in a scattered manner along the length direction of the connecting frame 2. Alternatively, referring to Figure 10, the first protrusion 206 is strip-shaped, and the length direction of the first protrusion 206 is parallel to the length direction of the connecting frame 2.

[0074] The width direction of the connecting frame 2 can be seen in the direction indicated by arrow D in Figure 9, and the length direction of the connecting frame 2 can be seen in the direction indicated by arrow E in Figures 12, 15, and 19. When there are multiple first protrusions 206 provided on a connecting segment 2021, the first protrusions 206 are located at the middle of the connecting segment 2021 along its width direction. The cross-sectional shape of the first protrusion 206 can be circular, square, polygonal, etc., and the cross-section of the first protrusion 206 is also the section of the first protrusion 206 perpendicular to the height direction of the connecting frame 2. When multiple first protrusions 206 are distributed in a scattered manner along the length direction of the connecting frame 2, it is beneficial to reduce costs and ensure the bonding area between the connecting frame 2 and the roof panel 3.

[0075] When the first protrusion 206 is strip-shaped, the shape of the cross-section of the first protrusion 206 perpendicular to the length direction of the connecting frame 2 can be square, trapezoidal, arc-shaped, etc. The first protrusion 206 can be located at the end of the connecting section 2021. When the material of the connecting frame 2 is aluminum alloy or fiber-reinforced composite material, the connecting frame 2 is usually formed by pultrusion molding. When the first protrusion 206 is strip-shaped, it is beneficial for the connecting frame 2 to be pultruded.

[0076] In some embodiments, referring to Figures 3 to 4, 9 to 14, and 21, a second protrusion 207 is provided on the first connecting portion 201. The second protrusion 207 is used for positioning the side of the photovoltaic module 1. The second protrusion 207, which is higher than the top surface 2012 of the first connecting portion 201, is also used for limiting the side of the photovoltaic module 1.

[0077] When the second protrusion 207 functions as a positioning element, it is specifically used for positioning the photovoltaic module 1 along the side of the connecting frame 2 along its length. When the second protrusion 207 functions as a limiting element, it is specifically used for limiting the photovoltaic module 1 along the side of the connecting frame 2 along its length. Multiple second protrusions 207 can be provided on the first connecting portion 201, and these multiple second protrusions 207 are arranged at intervals along the length of the connecting frame 2, with the photovoltaic module 1 located between two adjacent second protrusions 207.

[0078] On the one hand, when the photovoltaic module 1 is bonded to the connecting frame 2, the second protrusion 207 serves to position the side of the photovoltaic module 1 to facilitate its installation. On the other hand, when the second protrusion 207 is higher than the top surface 2012 of the first connecting part 201, the second protrusion 207 also serves to limit the side of the photovoltaic module 1, thus preventing the photovoltaic module 1 from sliding down. Furthermore, when the second protrusion 207 is higher than the light-receiving surface of the photovoltaic module 1, the second protrusion 207 also serves to prevent lightning strikes.

[0079] As an example, each second protrusion 207 is a convex hull 2071, and the convex hull 2071 is provided on the bottom wall of the glue receiving groove 2011. The shape of the cross-section of the convex hull 2071 can be circular, square, polygonal, etc. The cross-section of the convex hull 2071 is also the section of the convex hull 2071 perpendicular to the height direction of the connecting frame 2. The convex hull 2071 shown in FIG. 3 is higher than the light-receiving surface of the photovoltaic module 1. At this time, the convex hull 2071 is used for positioning and limiting the photovoltaic module 1 and also functions as a lightning protection flashover connection.

[0080] As another example, referring to FIGS. 4 and 14, each second protrusion 207 is a partial flanging 2072. The glue receiving groove 2011 is surrounded by a glue receiving bottom plate and two glue receiving side plates. When forming the partial flanging 2072, a "C"-shaped seam can be first cut at the edge of a specific area of the glue receiving bottom plate to separate the specific area from the main body part, and then the specific area is folded upward to form the partial flanging 2072. After the partial flanging 2072 is formed, the specific area of the original glue receiving bottom plate becomes a notch, and the notch is preferably located below the photovoltaic module 1. The partial flanging 2072 shown in FIGS. 4 and 14 is higher than the light-receiving surface of the photovoltaic module 1. At this time, the partial flanging 2072 is used for positioning and limiting the photovoltaic module 1 and also functions as a lightning protection flashover connection.

[0081] In some embodiments, the first connecting portion 201 has a glue receiving groove 2011, and the notch of the glue receiving groove 2011 faces away from the second connecting portion 202; the second protrusion 207 is located in the glue receiving groove 2011.

[0082] Among them, the glue receiving groove 2011 is used to store the glue 7. Along the width direction of the connecting frame 2, the size of the second protrusion 207 is smaller than the width of the glue receiving groove 2011. Along the width direction of the connecting frame 2, the size of the second protrusion 207 is preferably less than half of the width of the glue receiving groove 2011. The glue receiving groove 2011 can store a certain thickness of glue 7, so as to ensure the thickness of the glue 7 bonding the photovoltaic module 1 and the connecting frame 2, and to ensure the bonding strength between the photovoltaic module 1 and the connecting frame 2.

[0083] In some embodiments, the roof panel 3 has a roof bonding surface 304 bonded to the connecting frame 2 in the photovoltaic module mounting structure; the roof panel 3 includes a bottom plate portion 301 and a convex portion 302, and the roof bonding surface 304 is the top plane of the convex portion 302, or the roof panel 3 includes a bottom plate portion 301, and the roof bonding surface 304 is the top plane of the bottom plate portion 301; the roof structure includes at least one protruding structure protruding from the roof bonding surface 304; the protruding structure includes the edge locking structure 303 in the roof panel 3 and / or the corner portion protruding from the roof bonding surface 304 in the intermediate convex portion 3022 of the angle purlin type in the roof panel 3; or, the roof structure further includes a fastener 4 and a roof purlin 5, and the roof panel 3 is connected to the roof purlin 5 through the fastener 4, and the protruding structure is the head of the fastener 4.

[0084] The protrusion 302 protrudes upward from the bottom plate 301, and is divided into a semi-trapezoidal protrusion 3021, an angled intermediate protrusion 3022, and a trapezoidal protrusion 3023. The roof panel 3 has locking edges 303 at both ends along its width direction, and adjacent roof panels 3 are interlocked by adjacent locking edges 303. The locking edge structure 303 can be a standing hook-shaped locking edge, a standing arc locking edge, etc. The locking edge structure 303 shown in Figures 1 to 4, Figure 17, and Figure 21 is a standing hook-shaped locking edge, and the locking edge structure 303 shown in Figure 6 is a standing arc locking edge.

[0085] Referring to Figures 1 and 17, the roof panel 3 includes a base plate 301, a semi-trapezoidal protrusion 3021, and a vertical hook-shaped locking edge. Two adjacent semi-trapezoidal protrusions 3021 of two adjacent roof panels 3 are joined to form a complete trapezoid. The roof structure also includes an edge support 6, which is adjacent to the roof purlins 5. The edge support 6 is a boat-shaped support, and a connecting piece is provided at the top of the edge support 6. The vertical hook-shaped locking edge is connected to the connecting piece of the edge support 6.

[0086] Referring to Figure 5, the roof panel 3 includes a sag-shaped intermediate protrusion 3022, which is located between the two ends of the roof panel 3 along its width direction. The sag-shaped intermediate protrusion 3022 includes a trapezoidal portion and a corner portion disposed at the top of the trapezoidal portion. The roof bonding surface 304 is the top plane of the trapezoidal portion in the sag-shaped intermediate protrusion 3022, and the corner portion can be quadrilateral.

[0087] Referring to Figure 6, when the locking structure 303 in the roof panel 3 is a vertical arc locking edge, the roof panel 3 includes a bottom plate portion 301 but does not include the protrusion 302. In this case, the roof bonding surface 304 is the top plane of the bottom plate portion 301. After the connecting frame 2 is bonded to the roof panel 3, the vertical arc locking edge extends into the connecting frame 2.

[0088] Referring to Figures 7 and 8, the roof panel 3 includes multiple trapezoidal protrusions 3023. Fasteners 4 penetrate the trapezoidal protrusions 3023 and connect to the roof purlins 5. The fasteners 4 can be self-tapping screws. In Figure 7, the connecting bracket 2 is bonded to the trapezoidal protrusion 3023 with the fastener 4. In Figure 8, the connecting bracket 2 is bonded to the trapezoidal protrusion 3023 without the fastener 4.

[0089] In this embodiment, a universal connecting frame 2 can be used for different types of roof structures. The structure of the universal connecting frame 2 can be the structure shown in Figure 9. The universal connecting frame 2 can be adapted to roof structures including different types of protruding structures.

[0090] In some embodiments, different connecting frames 2 can be used for different types of roof structures. For example, for a roof panel 3 including a standing hook-shaped locking edge, the connecting frame 2 shown in FIG11 can be used. In this case, the angle between the bent portion 204 of the connecting frame 2 and the connecting section 2021 is a right angle, and the locking edge structure 303 of the roof panel 3 is a standing hook-shaped locking edge. The two match each other, and the bent portion 204 of the connecting frame 2 can further strengthen the locking edge structure 303, increase the connection strength of the locking edge structure 303, and also provide protection against rain and hail for the locking edge structure 303. For a roof panel 3 including an angled middle protrusion 3022, the connecting frame 2 shown in FIG9 can be used, which can further increase the strength of the angled middle protrusion 3022.

[0091] In some embodiments, the angle between the bent portion 204 and the connecting segment 2021 is greater than 0° and less than 90°. The angle between the bent portion 204 and the connecting segment 2021 can be α as shown in FIG9, and the angle α between the bent portion 204 and the connecting segment 2021 can be 30°, 45°, 50°, 60°, 65°, 70°, etc.

[0092] The angle between the bent portion 204 and the connecting section 2021 is preferably similar to the angle between the bottom inclined edge of the corner of the angled intermediate protrusion 3022 and the roof bonding surface 304; for example, the angle difference can be less than or equal to 5°. Along the width direction of the connecting frame 2, the width of the opening 205 is less than the maximum width of the corner of the angled intermediate protrusion 3022. Referring to Figure 5, when the inclined bent portion 204 engages with the corner of the angled intermediate protrusion 3022, the wind uplift resistance of the photovoltaic roof system can be further improved.

[0093] In some embodiments, the angle between the bend 204 and the connecting segment 2021 is 90°. In this embodiment, the connecting frame 2 is adapted to a roof panel 3 including a standing hook-shaped locking edge. When the connecting frame 2 is bonded to the roof panel 3 including the standing hook-shaped locking edge, the standing hook-shaped locking edge is located between the two bends 204 and is adjacent to the bends 204. When the adhesive 7 between the connecting segment 2021 and the roof bonding surface 304 overflows into the bend 204, part of the bend 204 is bonded to the bottom of the standing hook-shaped locking edge through the adhesive 7, which can increase the bonding area between the connecting frame 2 and the roof panel 3 and improve the strength at the standing hook-shaped locking edge.

[0094] In some embodiments, the end of the bent portion 204 away from the connecting section 2021 is connected to a flange 208; the flange 208 is in contact with the surface of the bent portion 204 near the connecting section 2021. The flange 208 is smaller than the bent portion 204 along its extension direction. When the connecting frame 2 is made of steel, it is at risk of rusting. Rusting typically begins at the flange 208 and then proceeds downwards through the bent portion 204 to the connecting section 2021. In this embodiment, the flange 208 and the bent portion 204 extend the path of rust to the connecting section 2021, slowing down the rusting rate and thus extending the service life of the connecting frame 2.

[0095] In some embodiments, the end of the first connecting portion 201 is connected to the side portion 203 by a first fillet 209; the radius of the first fillet 209 is greater than or equal to 3 times the wall thickness of the first connecting portion 201, and less than or equal to 6 times the wall thickness of the first connecting portion 201.

[0096] Preferably, the radius of the first fillet 209 is greater than or equal to four times the wall thickness of the first connecting portion 201, and less than or equal to six times the wall thickness of the first connecting portion 201. The end of the connecting segment 2021 furthest from the bending portion 204 is connected to the side portion 203 via a second fillet, the radius of which is smaller than the radius of the first fillet. If the end of the first connecting portion 201 has no fillet, stress concentration in the photovoltaic module 1 will occur when the connecting frame 2 is tilted, easily causing the photovoltaic module 1 to break. In this embodiment, the end of the first connecting portion 201 is connected to the side portion 203 via the first fillet 209, and when the radius of the first fillet 209 is within the aforementioned range, the radius of the first fillet 209 is relatively large, which can prevent stress concentration in the photovoltaic module 1 caused by the tilt of the connecting frame 2.

[0097] In some embodiments, referring to FIG10, the connecting frame 2 further includes a reinforcing rib 210, one end of which is connected to the first connecting portion 201, and the other end of which is connected to the side portion 203.

[0098] When the connecting frame 2 is made of aluminum alloy or fiber-reinforced composite material, reinforcing ribs 210 can be provided. When the connecting frame 2 is made of steel, reinforcing ribs 210 are not required. The end of the reinforcing rib 210 away from the side 203 extends to the bottom of the adhesive receiving groove 2011. A connecting frame 2 can be provided with two reinforcing ribs 210, and the two reinforcing ribs 210 can be arranged symmetrically. By providing reinforcing ribs 210, the strength of the connecting frame 2 can be enhanced, and the reliability of the connecting frame 2 under conditions such as strong winds and typhoons can be improved.

[0099] This application discloses a photovoltaic roof system in some embodiments, including a roof structure and a photovoltaic module installation structure provided in some embodiments. The roof structure includes a roof panel 3.

[0100] Referring to Figure 20, a heat dissipation channel is formed between the photovoltaic module 1, two adjacent connecting frames 2, and the roof panel 3. This channel utilizes air convection to achieve ventilation and heat dissipation. The heat generated by the photovoltaic module 1 can be directly discharged through the channel, reducing its temperature and improving its power generation efficiency. The circumferentially closed nature of the heat dissipation channel further enhances the wind uplift resistance of the photovoltaic roof system.

[0101] In some embodiments, referring to FIG19, the length direction of the connecting frame 2 is parallel to the extension direction of the roof panel 3; along the extension direction of the roof panel 3, the connecting frame 2 is a single strip on a roof panel 3, or the connecting frame 2 is divided into multiple segments.

[0102] When the connecting frame 2 is a single piece, its length is less than or equal to the length of the roof panel 3, and one connecting frame 2 is bonded to multiple photovoltaic modules. When the connecting frame 2 is divided into multiple segments, each segment can be bonded to one photovoltaic module 1. When the connecting frame 2 is a single piece, its installation is simple. When the connecting frame 2 is a single piece, it helps to reduce costs.

[0103] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0104] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of protection of this application, and these forms are all within the protection scope of this application.

Claims

1. A photovoltaic module mounting structure, characterized in that, The system includes a photovoltaic module and a connecting frame. The connecting frame includes a first connecting part and a second connecting part disposed opposite to each other. The first connecting part is bonded to the photovoltaic module, and the second connecting part is used to bond to a roof panel in the roof structure. The second connecting portion includes two connecting segments, with an opening formed between the two connecting segments. One end of each connecting segment near the opening is connected to a bent portion extending toward the first connecting portion, and the other end of each connecting segment away from the opening is connected to the first connecting portion via a side portion. A clearance space extending to the opening is formed between the two bending portions in the connecting frame, and the clearance space in at least one of the connecting frames is used to accommodate a protruding structure in the roof structure, the protruding structure protruding from the roof bonding surface in the roof panel for bonding with the second connecting portion.

2. The photovoltaic module mounting structure according to claim 1, characterized in that, A first protrusion is provided on the surface of the connecting segment opposite to the first connecting part; The connecting segment is bonded to the roof bonding surface with adhesive, and the thickness of the adhesive between the connecting segment and the roof bonding surface is greater than or equal to the height of the first protrusion.

3. The photovoltaic module mounting structure according to claim 2, characterized in that, Along the width direction of the connecting frame, the size of the first protrusion is smaller than the width of the connecting segment; The number of first protrusions provided on the connecting segment is multiple, and the multiple first protrusions are distributed in a scattered manner along the length direction of the connecting frame, or the first protrusions are strip-shaped, and the length direction of the first protrusions is parallel to the length direction of the connecting frame.

4. The photovoltaic module mounting structure according to claim 1, characterized in that, The first connecting part is provided with a second protrusion, which is used for positioning the side of the photovoltaic module; The second protrusion, which is higher than the top surface of the first connecting part, is also used to limit the side of the photovoltaic module.

5. The photovoltaic module mounting structure according to claim 4, characterized in that, The first connecting part has an adhesive groove, and the opening of the adhesive groove is away from the second connecting part; The second protrusion is located within the adhesive groove.

6. The photovoltaic module mounting structure according to claim 1, characterized in that, The connecting frame is bonded to the plurality of photovoltaic modules.

7. The photovoltaic module mounting structure according to claim 1, characterized in that, The angle between the bent portion and the connecting segment is greater than 0° and less than 90°.

8. The photovoltaic module mounting structure according to claim 1, characterized in that, The end of the bent portion away from the connecting section is connected to a folded edge; The folded edge is in contact with the surface of the bent portion near the connecting section.

9. The photovoltaic module mounting structure according to claim 1, characterized in that, The end of the first connecting portion is connected to the side portion by a first rounded corner; The radius of the first fillet is greater than or equal to 3 times the wall thickness of the first connecting part, and less than or equal to 6 times the wall thickness of the first connecting part.

10. The photovoltaic module mounting structure according to claim 1, characterized in that, The connecting frame also includes a reinforcing rib, one end of which is connected to the first connecting portion, and the other end of which is connected to the side portion.

11. A photovoltaic roofing system, characterized in that, It includes a roof structure and a photovoltaic module mounting structure as described in any one of claims 1 to 10, wherein the roof structure includes roof panels.

12. The photovoltaic roofing system according to claim 11, characterized in that, The roof panel has a roof bonding surface that is bonded to the connecting frame in the photovoltaic module mounting structure; the roof panel includes a bottom plate portion and a protrusion portion, and the roof bonding surface is the top plane of the protrusion portion, or the roof panel includes a bottom plate portion, and the roof bonding surface is the top plane of the bottom plate portion; The roof structure includes at least one protruding structure that protrudes from the roof bonding surface; The protruding structure includes a locking structure in the roof panel and / or a corner portion of the angled convex middle portion of the roof panel that protrudes from the roof bonding surface; or, the roof structure further includes fasteners and roof purlins, the roof panel being connected to the roof purlins via the fasteners, and the protruding structure being the head of the fasteners.

13. The photovoltaic roofing system according to claim 11, characterized in that, The length direction of the connecting frame is parallel to the extension direction of the roof panel; Along the extension direction of the roof panel, on one of the roof panels, the connecting frame is a single piece, or the connecting frame is divided into multiple segments.

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